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International Journal of Trend in Scientific Research and Development (IJTSRD)
Volume 5 Issue 4, May-June 2021 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470
@ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1560
Solar Irradiation Prediction using back
Propagation and Artificial Neural Network
Harendra Kumar Verma1, Ashish Bhargava2
1Research Scholar, 2Professor,
1,2Bhabha Engineering Research Institute, Bhopal, Madhya Pradesh, India
ABSTRACT
Solar Energy is one of most promising potential renewable sources of energy.
But among all the conventional sources of renewable energy, its nature is
quite unpredictable owing to the fact that the solar irradiation keeps on
changing and fluctuating. This leads to uncertainty in ascertaining the exact
measure of solar power that can be harnessed. Hence forth, a solarirradiation
model based on solar irradiationusingANN shall aidinpreliminaryestimation
of the measure of solar power energy that is available for usage incorporating
the load dispatch and grid. This proposed work of study puts forward an
Artificial Intelligence based model of a Solar Irradiation Forecasting
implemented by Artificial Neural Networks (ANN). ANN is utilized accredited
to its adaptive, data driven and nonlinear nature that exhibits high efficacy in
forecasting domains. An endeavor has been also made for solar irradiation
forecast using the ANN along with Levenberg Marquardt (LM) algorithm. The
primary reason for using the Levenberg Marquardtalgorithmisthefactthatis
an extremely effective algorithm employing back propagation. The attributes
of the algorithm are high stability and speed which yields lesser number of
iterations and relatively less magnitude of errors.
The evaluation of the proposed system needs to be done on performance
specific parameters which in this case are chosen as Mean Absolute
Percentage Error (MAPE) and Regression. Mean absolute percentage error
indicates the amount of errors present in the prediction which is to say the
deviation between the actual targetsandpredictedoutput.Anotherparameter
which validates the mean absolute percentage error is theregression whichis
a graphical representation of discrete values in the target set and the
predicted output. Additional analysis mechanisms such as training states has
been also presented which depicts how the mean square error plummets as
the number of iterations increase. The variation of mean square error can be
seen in training, testing and validation phases. The neural network topology
used is 1-20-1 indicating one neuron in the input layer, 20 neurons in the
hidden layer and 1 neuron in the output layer respectively. It has been shown
that the proposed methodology attains a very goodaccuracyofapproximately
97.74% with the error rate amounting to a meager 2.76%. This model serves
to be a robust mechanism and shows good performance. The low error and
high accuracy can be attributed to the efficacy of back propagationinArtificial
Neural Networks. A comparativeanalysisisalsopresentedwithcontemporary
work that attains an error of 30%, proving the fact that the proposed system
outperforms the contemporary techniques.
KEYWORDS: Renewable energy; artificial neural network; artificial intelligence;
survey
How to cite this paper: Harendra Kumar
Verma | Ashish Bhargava "Solar
Irradiation Prediction using back
Propagation and Artificial Neural
Network" Published
in International
Journal of Trend in
Scientific Research
and Development
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6470, Volume-5 |
Issue-4, June 2021,
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1. INTRODUCTION
Solar power is one of the most reliable renewable sources of
energy and holds strong potential for harnessing energy
from it. If used in an effective method, it can aid in meeting
high energy requirements in today high energy demanding
economy. But one of the flipsides to the solar power energy
is its uncertainty of the measure of energy that can be
actually obtained. Among all the renewable resources of
energy, like wind energy, geo thermal energy and tidal
energy, the energy from solar power is subjectedtothemost
fluctuations and variations as the solar irradiation keeps on
changing and varying with time owing to various reasons
related to natural phenomenon. This causes the amount of
energy that can be harnessed at a given time asnon
determinable. If this unsure system is utilized to harnessthe
energy of solar power, it can render to be very infeasibleand
inappropriate in terms of power quality, system stability,
power frequency and other voltageandpowerrelatedissues
may arise. The fluctuations and varyingsolarirradiancemay
subject the system to unstable results. The grid power, load
dispatch would also get impacted.
IJTSRD43673
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@ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1561
Therefore to solve this problem and make solar irradiation
energy harnessing a reliable resource, the concept of solar
irradiation forecasting plays a crucial role. The initial
forecasting of solar irradiation shall resolve this for a good
and proper solar power generation for the grid system. As
the measure of solar irradiation powerdependsonthemean
daily solar irradiance, solar irradiation forecasting
methodology shall aid us in attaining our objective
efficiently.
A number of diverse and broad ranges of concepts can
utilized in this regard to forecast solar irradiation power.
These methods are categorized according to their groups as
in whether they are physical or statistical in nature of
approach of forecasting. The conventional methods are
employed are mainlybasedonnumerical weather prediction
method where it is taken as the input for the forecast. But
today the efficiency of Artificial Neuron Networks is
undisputable. ANN possesses high capability to figure out
non linear relations and connectionsamongtheinputoutput
domains. So in this proposed work, Artificial Neural
Networks has been chosen as the most effective method for
the solar irradiation forecasting. It has been implemented in
the MATLAB environment.
This proposed study of work very clearly shows and
illustrates the solar irradiation forecasting model and its
analysis and study based on the ANN with three distinct
algorithms implemented. Endeavour has been made to
forecast the wind speed using ANN along with Levenberg-
Marquard (LM) algorithm. The results have been assesses
according to the convergence speed relating to the Mean
Absolute Error (MAE), Mean Square Error (MSE) and Mean
Absolute Error (MAPE).
2. Literature Review:
Literature Survey outlines the past researchworksthathave
been carried in this context of work. These are essential as
they give an over view about the past works done and
problems that have been resolved and the areas that have
scope for future improvement.
L.SaadSaoud et al. in 2016 [1] put forth a techniquetodesign
a wavelet neural network for the prediction of solar
irradiation. In the paper, a fully complex valued wavelet
neural network was designed wherein the Neural Network
architecture’s mechanism was such that the activation
function could compute the wavelet transform of the
previous data once the neural network was trained by the
training data. Moreover it was shown that the system used
fully complex values of weights pertaining to the waveletco-
efficients which would affect the weight while training the
neural network architecture. Itwasshownthattheproposed
technique was able to achieve an accuracy of around 94.8%.
Vishal Sharma et al. in 2016 [3] presented an idea of using
solar irradiance prediction to gauge the output of solar PV
systems. The technique used a mixed wavelet neural
network for the prediction of solar irradiance prediction.
The proposed system utilized the inherent signal
compression property of the wavelet transform to predict
data which was highly non- stationary with a lot of
information content because of the randomness of the data
set. The design used a Morlet-Mexican hat wavelet function
as the activation function of the designed neural network.
The mean square error for one hour prediction was 17.82%,
thus an accuracy of 82.18%. TarlochanKaur in 2016[6]gave
a research that consisted development of five different ANN
models for short-term wind speed forecasting. In this work
of study, they employed train BR and train LM algorithm for
the training purposes. These 5 different approaches were
used to bring the best performance metric out of each one of
them. These models varied on the basis of number of
neurons and number of iterations. Following the training it
was found that the optimal metric for the configuration was
of 4 input neurons, 19 hidden layer neurons and 1 output
layer neuron. As there was no data pre processing
implemented, the system exhibited 70% accuracy with30%
error metrics. M. Rajendra et al. in 2015 [14] discuss the
numerical simulation of the multiple crack identificationofa
cantilever beam with zero noise and with 5% Gaussian
random noise addition to the input patterns was evaluated
with ICRBF neural network in comparison with IRBF, CRBF
and RBF neural networks in frequency domain. LHS
technique was used to sample the different levels of crack
depth and their location as output patterns in the designed
search space; and FFCs and DSIs as input patterns were
simulated numerically from finite element analysis (FEA) to
train the neural networks.M. Sivachitra et al. in 2015 [15]
developed meta-cognitive fully complex-valued functional
link network (Mc-FCFLN) for solving real valued classi-
fication problems has been presented. The Mc-FCFLN is a
network without hidden layers. The neurons in the input
layer ofMc-FCFLN employ a polynomial expansion for
introducing the nonlinearity. Moreover, the neurons in the
output layer are linear. The weight between the input and
the output layer is estimated using recursive algorithm. The
experimental studies on the various benchmark data sets
show that the Mc-FCFLN outperforms FCFLN classifier. The
performance study in comparison with FCFLN clearly
indicates that the proposed classifier has a better
classification ability. ManjeevanSeera et al. in 2015 [19]has
been described a modified FMM network for data clustering.
Before evaluating the usefulness of MFMM, a number of
clustering methods are first reviewed. Useful modifications
pertaining to FMM an efficient clustering method have been
proposed. These include procedures for computing the
cluster centroids. A number of benchmark data sets have
been used to evaluate the evolution patterns of the cluster
structures of MFMM, and to compare the MFMM
performances with those reported in the literature. TheCCC
results of MFMM obtained from the benchmark studies are
better than those from other existing clustering methods.
Min-Yuan Cheng et al. in 2014 [23]constructed using
simulation data is a major limitation of EMARS. EMARS thus
should be tested more widelyusingactual datasetsandother
real problems in the field of building energy performance.
Nevertheless, the collecting and processing data newly
actual datasets are of great effortsandtimeconsuming.They
would like to consider this to be promising future research
directions. Jujie Wang et al. in 2014 [24]proposed a novel
EMD–ENN approach, which combines empirical mode
decomposition (EMD) and the Elman neural network (ENN),
is to forecast wind speed. First, the original wind speed
datasets are decomposed into a collection of IMFs and a
residue by EMD, which are relatively stationary sub-series
and can be readily modeled. Second, both the IMF
components and the residue are used to establish the
corresponding ENN models. Anirudh S. Shekhawat in 2014
[7]gave a paper that stated about wind speed forecasting
methods implementing two back propagation algorithms
both of which use the LM algorithm. Those two methods are
NAR NAR (NonlinearAutoRegression)andNARX(Nonlinear
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Auto Regression with Exogenous input). After
implementation, the author concluded that NARX was more
effective than NAR. Both the pre processing methods
delivered good performance using the LM algorithm.Zibo
Dong et al. in 2013 [33]proposed ESSS model. Compared
with other popular statistical timeseriesmodelslikeARIMA,
LES, SES and RW, the ESSS model has better forecasting
accuracy for the forecasting horizon from 5 to 20 min. The
forecasting interval produced by theESSSmodel canachieve
90% accuracy. Moreover, our novel formulation of Fourier
trend model also outperforms other trend models.
3.Objective: The principle aim of this proposed study of
work is to find the capacity of the artificial neural networks
to figure out the most result oriented weights to gauge
power generated from forecasting of solar irradiation. The
records of past collection of data are used for this purpose.
The most efficient and fruitful model is to found that shall
provide optimum results. The outcomes form the effective
system of models are matched and compared with liner
systems of model to evaluate the effectiveness of the
Artificial Neural Networks to acquire the non linearity traits
of the input domain values.
3. Methodology:
Artificial Neural Networks (ANN) is the term used for
systems which try to work the way human brain works.
Means system try to perform certain task the way humans
do.Normally computers do any work the way it is instructed
in the form of code, but it does not have the capability of
completing works which it was never taught of. But if we
consider a human brain, it has self-learning capability which
makes it perform much process which it has been neither
performed nor taught. So, ANN basically tries to inherit this
capability of human brain to self-train itself for tasks which
are never been performed by it that too very efficiently.
Human brain’s structure consists of neurons which are
interconnected with each other and there by forming a very
large network which is well connected thereby helps in
performing very complex task like voice and image
recognition very easily. The same task when performed
using normal computer won’t give accurate result. Hence
ANN mimics neurons structure of human brain to discover
link between input and targets. Neurons have this ability to
save previous experimental data.
Fig 1 Biological Model of Neuron
The speed of human brain is several thousand time faster than traditional computer because in brain unlike traditional
computer as whole information is not passed from neuron to neuron they are rather encoded in the neuron network. This is
reason why neural network is also named as connectionism.
The dendrites are the branches that are linked to the cell body and stretched in space around the cell body to receive signals
from neighboring neurons. The axon works as a transmitteroftheneuron.Itsendssignalstoneighboring neurons. Thesynapse
or synaptic terminal are the connection between the axon of one neuronandthedendritesofneighboring neutron, whichisthe
communication link in between the two neurons.
Electrochemical signals are communicated from the synapse. When the total signal received by a neuron is more than the
synapse threshold, it causes the neuron to fire i.e., send an electrochemical signal toneighboring neurons.Itisassumedthatthe
change in the strength of the synaptic connection is the basis of human memory [20]. This change is developed in ANN in the
form of weights between neurons.
Fig 2 Mathematical equivalent of Neuron
In order to perform any type of action in our body, different parts of the body (sense organs)sendsignalswhichtravel through
other parts and reach the brain neuron’s where the neuron processes it and generates the required output signal. It should be
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noted though that the output of a neuron may also be fed to another neuron. A collection of such neurons is called a neural
network. The transformation of the biological model of neuron into a mathematical model is shown in the figure 2. “x” are
different inputs which are weighted by a weight corresponding to a path that the signal travels. Theneuronisthenexpectedto
add an effect in the form of an activation function and the complete signal then goes through a transformation S which
produces the output of the neural network. Consider a signal s1 travelling through a path p1 from dendrites with weight 1to
the neuron. Then the value of signal reaching the neuron will be s1. 1.If thereare“n”suchsignalstravellingthroughndifferent
paths with weights ranging from 1 to and the neuron has an internal firing threshold value of θn, then the total activation
function of the neuron is given by:
n
= �Xi .Wi+ θ (1)
i=1
Here Xi represents the signals arriving through various paths, Wi represents theweight correspondingtothevariouspathsand
θ is the bias. The entire mathematical model of the neuron or the neural network can be visualized pictorially or the pictorial
model can be mathematically modeled. The design of the neural network can be modeled mathematically and the more
complex the neural design, more is the complexity of the tasks that can be accomplished by the neural network. The above
concept can be visualized by the following diagram:
Fig 3 The mathematical formulation of the neural model
The soul of the above model lies in the fact that the system so developed tries to mimic the working of human brain intermsof
the following:
1. It works in a complex parallel computation manner
2. High speed of performance due to the parallel architecture.
It learning and adapt according to the modified link weights.
Work on ANN has been inspired right from its inception by theacknowledgementthatthehuman braincomputesinanentirely
different way from the conventional digital computer.
ANN has an astonishing ability to find a relationship between completely non-linear data’s which can be implemented
successfully to detect trends and thus find the pattern followed by our targets which is impossible for human brains to notice.
ANN poses great ability to train itself based on the data provided to it forinitial training. Ithasthetendencyofself-organization
during learning period and it can perform during real time operation.
Fig 4 The mathematical formulation of the neural model
The soul of the above model lies in the fact that the system so developed tries to mimic the working of human brain intermsof
the following:
1) It works in a complex parallel computation manner
2) High speed of performance due to the parallel architecture.
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It learning and adapt according to the modified link weights
Work on ANN has been inspired right from its inception by theacknowledgementthatthehuman braincomputesinanentirely
different way from the conventional digital computer.
ANN has an astonishing ability to find a relationship between completely non-linear data’s which can be implemented
successfully to detect trends and thus find the pattern followed by our targets which is impossible for human brains to notice.
ANN poses great ability to train itself based on the data provided to it forinitial training. Ithasthetendencyofself-organization
during learning period and it can perform during real time operation.
Figure 4.shows the working ANN model implemented for presentstudy.Totheneuronsoftheinputlayerofthisnetwork,input
signals are fed. This input layers neurons are linked to all the neurons of hidden layer. All these links has some associated
weights, whose value depends upon input signal’s state. Our aim is to find the optimum values of these weights.Theactivation
function of hidden layer neurons is the main factor in deciding values of weights. Hidden layers neuronsarefurther connected
to output layer neurons. The weights of this connection between hidden and output layer is also need to be optimized with
prior weights.
4. Results And Discussions:
The results are based on the performance metrics utiized in the proposed work.Respectiveperformanceanalysisandplotsand
graphs of results have also been illustrated to provide a clear picture. The best state thatgivestheoptimimresulthasalsobeen
stated.
The tool Matrix Laboratory (MATLAB R2017a) has been used to carry out this proposed work based using the Levenberg
Marquardt back propagation algorithm. The following section presents and exemplifies the results.
Figure 5 Visualization of Designed Neural Network for LM Training.
In this image, the neural network system can be observed that is set on the LM algorithm. Various layers can be seen to be
connected and related. W is the value for branch weight for connection and bias value is denoted by b. Weights is further
classified as Input weights: weights among the input layer and hidden layer and Layer Weights: that are the weights situated
between concealed layer and neurons of output layer.
Figure 6 Comparison between the predicted and actual solar irradiation employing the proposed model using LM
training.
The figures given above show the prediction system model for solar irradiation. A combined and superimposed analysis of
actual and predicted solar irradiation has been shown in figure 6. It can be seen that the proposed system achieves a Mean
Absolute Percentage Error (MAPE) or MAE% of just 2.76%. Figure 6.gives the plot diagram of performance.Thisis depictedas
the function of performance and measure of repetitions. After 30 epochs the optimally best performance is found. The
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validating process entails supervision for validity and scope of subsequent increase in performance. If no such further
possibility of betterment is conducive, it is not trained anymore and stopped. The outcomes are put forth for comparative
analysis.
Figure 7 Computed MSE value using the proposed LM trained Neural Network
Figure 8 Regression plot during training, testing & validation for Proposed for Bayesian LM training algorithm
The measure of correlation amongst the output metrics are done bytheR whichisthe Regressionvalue. WhenR is1,itsignifies
a relation that is quite close and R as 0 conveys the relation to be loose and random. It can be seen from figure 5.4 that the
overall regression of the proposed system is 0.948 which is prettycloseto1,therebyrenderingvalidationforthehighaccuracy
achieved. The captured image of the training procedure has been shown as the neural network screen shot from MATLAB
implementation in the Figure. 8. As follows-
Figure 9 The training phase using the NN Tool
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The following points can be noted about the designed ANN architecture.
1) There are 20 neurons in the hidden layer. The number of neurons in the hidden layer decides the efficacy with which
the neural network can analyze a problem. The more the number of neurons in the hidden layer, more is the system’s
computational caliber but the system complexity increases.
The training algorithm used in the proposed system is the Levenberg-Marquardt back propagation algorithm. It is bothstable
and fast thereby rendering accuracy and low time complexity to the proposed system. The number of validation checks is 6
which indicates the fact that the ANN architecture checks for any changes in the state of errors for 6 times before it ends
training and starts testing.
Figure 10 MAPE comparison with base paper
Figure 11 Accuracy comparison with base paper
5. Conclusion:
So in the given work, it has been tried to predict solar
irradiation using Back Propagation in Artificial Neural
Networks. The Levenberg-Marquardt back propagation
algorithm has been used for the proposed approach. The
number of neurons taken for the design is twenty though it
can be varied. The proposed system attains an accuracy of
97.84% and a mean absolute percentage error (MAPE) of
2.76%. The following additional concluding points can be
inferred.
1) Here the data collected in quantitythatcanalsobetermed
as mining of data shows exhaustive trait.
2) The Levenberg-Marquardt (LM) Algorithm has also been
used to test and train the ANN. This happens to be an
efficient method that offers stable forecasting and also
converges fast.
It has been shown that the proposed technique achieves
lesser errors and higher accuracy compared to
contemporary techniques. The low error or high accuracy
values can be validated using the regression of the proposed
system which is 0.948 (approx).
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Solar Irradiation Prediction using back Propagation and Artificial Neural Network

  • 1. International Journal of Trend in Scientific Research and Development (IJTSRD) Volume 5 Issue 4, May-June 2021 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1560 Solar Irradiation Prediction using back Propagation and Artificial Neural Network Harendra Kumar Verma1, Ashish Bhargava2 1Research Scholar, 2Professor, 1,2Bhabha Engineering Research Institute, Bhopal, Madhya Pradesh, India ABSTRACT Solar Energy is one of most promising potential renewable sources of energy. But among all the conventional sources of renewable energy, its nature is quite unpredictable owing to the fact that the solar irradiation keeps on changing and fluctuating. This leads to uncertainty in ascertaining the exact measure of solar power that can be harnessed. Hence forth, a solarirradiation model based on solar irradiationusingANN shall aidinpreliminaryestimation of the measure of solar power energy that is available for usage incorporating the load dispatch and grid. This proposed work of study puts forward an Artificial Intelligence based model of a Solar Irradiation Forecasting implemented by Artificial Neural Networks (ANN). ANN is utilized accredited to its adaptive, data driven and nonlinear nature that exhibits high efficacy in forecasting domains. An endeavor has been also made for solar irradiation forecast using the ANN along with Levenberg Marquardt (LM) algorithm. The primary reason for using the Levenberg Marquardtalgorithmisthefactthatis an extremely effective algorithm employing back propagation. The attributes of the algorithm are high stability and speed which yields lesser number of iterations and relatively less magnitude of errors. The evaluation of the proposed system needs to be done on performance specific parameters which in this case are chosen as Mean Absolute Percentage Error (MAPE) and Regression. Mean absolute percentage error indicates the amount of errors present in the prediction which is to say the deviation between the actual targetsandpredictedoutput.Anotherparameter which validates the mean absolute percentage error is theregression whichis a graphical representation of discrete values in the target set and the predicted output. Additional analysis mechanisms such as training states has been also presented which depicts how the mean square error plummets as the number of iterations increase. The variation of mean square error can be seen in training, testing and validation phases. The neural network topology used is 1-20-1 indicating one neuron in the input layer, 20 neurons in the hidden layer and 1 neuron in the output layer respectively. It has been shown that the proposed methodology attains a very goodaccuracyofapproximately 97.74% with the error rate amounting to a meager 2.76%. This model serves to be a robust mechanism and shows good performance. The low error and high accuracy can be attributed to the efficacy of back propagationinArtificial Neural Networks. A comparativeanalysisisalsopresentedwithcontemporary work that attains an error of 30%, proving the fact that the proposed system outperforms the contemporary techniques. KEYWORDS: Renewable energy; artificial neural network; artificial intelligence; survey How to cite this paper: Harendra Kumar Verma | Ashish Bhargava "Solar Irradiation Prediction using back Propagation and Artificial Neural Network" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456- 6470, Volume-5 | Issue-4, June 2021, pp.1560-1567, URL: www.ijtsrd.com/papers/ijtsrd43673.pdf Copyright © 2021 by author (s) and International Journal ofTrendinScientific Research and Development Journal. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0) (http: //creativecommons.org/licenses/by/4.0) 1. INTRODUCTION Solar power is one of the most reliable renewable sources of energy and holds strong potential for harnessing energy from it. If used in an effective method, it can aid in meeting high energy requirements in today high energy demanding economy. But one of the flipsides to the solar power energy is its uncertainty of the measure of energy that can be actually obtained. Among all the renewable resources of energy, like wind energy, geo thermal energy and tidal energy, the energy from solar power is subjectedtothemost fluctuations and variations as the solar irradiation keeps on changing and varying with time owing to various reasons related to natural phenomenon. This causes the amount of energy that can be harnessed at a given time asnon determinable. If this unsure system is utilized to harnessthe energy of solar power, it can render to be very infeasibleand inappropriate in terms of power quality, system stability, power frequency and other voltageandpowerrelatedissues may arise. The fluctuations and varyingsolarirradiancemay subject the system to unstable results. The grid power, load dispatch would also get impacted. IJTSRD43673
  • 2. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1561 Therefore to solve this problem and make solar irradiation energy harnessing a reliable resource, the concept of solar irradiation forecasting plays a crucial role. The initial forecasting of solar irradiation shall resolve this for a good and proper solar power generation for the grid system. As the measure of solar irradiation powerdependsonthemean daily solar irradiance, solar irradiation forecasting methodology shall aid us in attaining our objective efficiently. A number of diverse and broad ranges of concepts can utilized in this regard to forecast solar irradiation power. These methods are categorized according to their groups as in whether they are physical or statistical in nature of approach of forecasting. The conventional methods are employed are mainlybasedonnumerical weather prediction method where it is taken as the input for the forecast. But today the efficiency of Artificial Neuron Networks is undisputable. ANN possesses high capability to figure out non linear relations and connectionsamongtheinputoutput domains. So in this proposed work, Artificial Neural Networks has been chosen as the most effective method for the solar irradiation forecasting. It has been implemented in the MATLAB environment. This proposed study of work very clearly shows and illustrates the solar irradiation forecasting model and its analysis and study based on the ANN with three distinct algorithms implemented. Endeavour has been made to forecast the wind speed using ANN along with Levenberg- Marquard (LM) algorithm. The results have been assesses according to the convergence speed relating to the Mean Absolute Error (MAE), Mean Square Error (MSE) and Mean Absolute Error (MAPE). 2. Literature Review: Literature Survey outlines the past researchworksthathave been carried in this context of work. These are essential as they give an over view about the past works done and problems that have been resolved and the areas that have scope for future improvement. L.SaadSaoud et al. in 2016 [1] put forth a techniquetodesign a wavelet neural network for the prediction of solar irradiation. In the paper, a fully complex valued wavelet neural network was designed wherein the Neural Network architecture’s mechanism was such that the activation function could compute the wavelet transform of the previous data once the neural network was trained by the training data. Moreover it was shown that the system used fully complex values of weights pertaining to the waveletco- efficients which would affect the weight while training the neural network architecture. Itwasshownthattheproposed technique was able to achieve an accuracy of around 94.8%. Vishal Sharma et al. in 2016 [3] presented an idea of using solar irradiance prediction to gauge the output of solar PV systems. The technique used a mixed wavelet neural network for the prediction of solar irradiance prediction. The proposed system utilized the inherent signal compression property of the wavelet transform to predict data which was highly non- stationary with a lot of information content because of the randomness of the data set. The design used a Morlet-Mexican hat wavelet function as the activation function of the designed neural network. The mean square error for one hour prediction was 17.82%, thus an accuracy of 82.18%. TarlochanKaur in 2016[6]gave a research that consisted development of five different ANN models for short-term wind speed forecasting. In this work of study, they employed train BR and train LM algorithm for the training purposes. These 5 different approaches were used to bring the best performance metric out of each one of them. These models varied on the basis of number of neurons and number of iterations. Following the training it was found that the optimal metric for the configuration was of 4 input neurons, 19 hidden layer neurons and 1 output layer neuron. As there was no data pre processing implemented, the system exhibited 70% accuracy with30% error metrics. M. Rajendra et al. in 2015 [14] discuss the numerical simulation of the multiple crack identificationofa cantilever beam with zero noise and with 5% Gaussian random noise addition to the input patterns was evaluated with ICRBF neural network in comparison with IRBF, CRBF and RBF neural networks in frequency domain. LHS technique was used to sample the different levels of crack depth and their location as output patterns in the designed search space; and FFCs and DSIs as input patterns were simulated numerically from finite element analysis (FEA) to train the neural networks.M. Sivachitra et al. in 2015 [15] developed meta-cognitive fully complex-valued functional link network (Mc-FCFLN) for solving real valued classi- fication problems has been presented. The Mc-FCFLN is a network without hidden layers. The neurons in the input layer ofMc-FCFLN employ a polynomial expansion for introducing the nonlinearity. Moreover, the neurons in the output layer are linear. The weight between the input and the output layer is estimated using recursive algorithm. The experimental studies on the various benchmark data sets show that the Mc-FCFLN outperforms FCFLN classifier. The performance study in comparison with FCFLN clearly indicates that the proposed classifier has a better classification ability. ManjeevanSeera et al. in 2015 [19]has been described a modified FMM network for data clustering. Before evaluating the usefulness of MFMM, a number of clustering methods are first reviewed. Useful modifications pertaining to FMM an efficient clustering method have been proposed. These include procedures for computing the cluster centroids. A number of benchmark data sets have been used to evaluate the evolution patterns of the cluster structures of MFMM, and to compare the MFMM performances with those reported in the literature. TheCCC results of MFMM obtained from the benchmark studies are better than those from other existing clustering methods. Min-Yuan Cheng et al. in 2014 [23]constructed using simulation data is a major limitation of EMARS. EMARS thus should be tested more widelyusingactual datasetsandother real problems in the field of building energy performance. Nevertheless, the collecting and processing data newly actual datasets are of great effortsandtimeconsuming.They would like to consider this to be promising future research directions. Jujie Wang et al. in 2014 [24]proposed a novel EMD–ENN approach, which combines empirical mode decomposition (EMD) and the Elman neural network (ENN), is to forecast wind speed. First, the original wind speed datasets are decomposed into a collection of IMFs and a residue by EMD, which are relatively stationary sub-series and can be readily modeled. Second, both the IMF components and the residue are used to establish the corresponding ENN models. Anirudh S. Shekhawat in 2014 [7]gave a paper that stated about wind speed forecasting methods implementing two back propagation algorithms both of which use the LM algorithm. Those two methods are NAR NAR (NonlinearAutoRegression)andNARX(Nonlinear
  • 3. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1562 Auto Regression with Exogenous input). After implementation, the author concluded that NARX was more effective than NAR. Both the pre processing methods delivered good performance using the LM algorithm.Zibo Dong et al. in 2013 [33]proposed ESSS model. Compared with other popular statistical timeseriesmodelslikeARIMA, LES, SES and RW, the ESSS model has better forecasting accuracy for the forecasting horizon from 5 to 20 min. The forecasting interval produced by theESSSmodel canachieve 90% accuracy. Moreover, our novel formulation of Fourier trend model also outperforms other trend models. 3.Objective: The principle aim of this proposed study of work is to find the capacity of the artificial neural networks to figure out the most result oriented weights to gauge power generated from forecasting of solar irradiation. The records of past collection of data are used for this purpose. The most efficient and fruitful model is to found that shall provide optimum results. The outcomes form the effective system of models are matched and compared with liner systems of model to evaluate the effectiveness of the Artificial Neural Networks to acquire the non linearity traits of the input domain values. 3. Methodology: Artificial Neural Networks (ANN) is the term used for systems which try to work the way human brain works. Means system try to perform certain task the way humans do.Normally computers do any work the way it is instructed in the form of code, but it does not have the capability of completing works which it was never taught of. But if we consider a human brain, it has self-learning capability which makes it perform much process which it has been neither performed nor taught. So, ANN basically tries to inherit this capability of human brain to self-train itself for tasks which are never been performed by it that too very efficiently. Human brain’s structure consists of neurons which are interconnected with each other and there by forming a very large network which is well connected thereby helps in performing very complex task like voice and image recognition very easily. The same task when performed using normal computer won’t give accurate result. Hence ANN mimics neurons structure of human brain to discover link between input and targets. Neurons have this ability to save previous experimental data. Fig 1 Biological Model of Neuron The speed of human brain is several thousand time faster than traditional computer because in brain unlike traditional computer as whole information is not passed from neuron to neuron they are rather encoded in the neuron network. This is reason why neural network is also named as connectionism. The dendrites are the branches that are linked to the cell body and stretched in space around the cell body to receive signals from neighboring neurons. The axon works as a transmitteroftheneuron.Itsendssignalstoneighboring neurons. Thesynapse or synaptic terminal are the connection between the axon of one neuronandthedendritesofneighboring neutron, whichisthe communication link in between the two neurons. Electrochemical signals are communicated from the synapse. When the total signal received by a neuron is more than the synapse threshold, it causes the neuron to fire i.e., send an electrochemical signal toneighboring neurons.Itisassumedthatthe change in the strength of the synaptic connection is the basis of human memory [20]. This change is developed in ANN in the form of weights between neurons. Fig 2 Mathematical equivalent of Neuron In order to perform any type of action in our body, different parts of the body (sense organs)sendsignalswhichtravel through other parts and reach the brain neuron’s where the neuron processes it and generates the required output signal. It should be
  • 4. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1563 noted though that the output of a neuron may also be fed to another neuron. A collection of such neurons is called a neural network. The transformation of the biological model of neuron into a mathematical model is shown in the figure 2. “x” are different inputs which are weighted by a weight corresponding to a path that the signal travels. Theneuronisthenexpectedto add an effect in the form of an activation function and the complete signal then goes through a transformation S which produces the output of the neural network. Consider a signal s1 travelling through a path p1 from dendrites with weight 1to the neuron. Then the value of signal reaching the neuron will be s1. 1.If thereare“n”suchsignalstravellingthroughndifferent paths with weights ranging from 1 to and the neuron has an internal firing threshold value of θn, then the total activation function of the neuron is given by: n = �Xi .Wi+ θ (1) i=1 Here Xi represents the signals arriving through various paths, Wi represents theweight correspondingtothevariouspathsand θ is the bias. The entire mathematical model of the neuron or the neural network can be visualized pictorially or the pictorial model can be mathematically modeled. The design of the neural network can be modeled mathematically and the more complex the neural design, more is the complexity of the tasks that can be accomplished by the neural network. The above concept can be visualized by the following diagram: Fig 3 The mathematical formulation of the neural model The soul of the above model lies in the fact that the system so developed tries to mimic the working of human brain intermsof the following: 1. It works in a complex parallel computation manner 2. High speed of performance due to the parallel architecture. It learning and adapt according to the modified link weights. Work on ANN has been inspired right from its inception by theacknowledgementthatthehuman braincomputesinanentirely different way from the conventional digital computer. ANN has an astonishing ability to find a relationship between completely non-linear data’s which can be implemented successfully to detect trends and thus find the pattern followed by our targets which is impossible for human brains to notice. ANN poses great ability to train itself based on the data provided to it forinitial training. Ithasthetendencyofself-organization during learning period and it can perform during real time operation. Fig 4 The mathematical formulation of the neural model The soul of the above model lies in the fact that the system so developed tries to mimic the working of human brain intermsof the following: 1) It works in a complex parallel computation manner 2) High speed of performance due to the parallel architecture.
  • 5. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1564 It learning and adapt according to the modified link weights Work on ANN has been inspired right from its inception by theacknowledgementthatthehuman braincomputesinanentirely different way from the conventional digital computer. ANN has an astonishing ability to find a relationship between completely non-linear data’s which can be implemented successfully to detect trends and thus find the pattern followed by our targets which is impossible for human brains to notice. ANN poses great ability to train itself based on the data provided to it forinitial training. Ithasthetendencyofself-organization during learning period and it can perform during real time operation. Figure 4.shows the working ANN model implemented for presentstudy.Totheneuronsoftheinputlayerofthisnetwork,input signals are fed. This input layers neurons are linked to all the neurons of hidden layer. All these links has some associated weights, whose value depends upon input signal’s state. Our aim is to find the optimum values of these weights.Theactivation function of hidden layer neurons is the main factor in deciding values of weights. Hidden layers neuronsarefurther connected to output layer neurons. The weights of this connection between hidden and output layer is also need to be optimized with prior weights. 4. Results And Discussions: The results are based on the performance metrics utiized in the proposed work.Respectiveperformanceanalysisandplotsand graphs of results have also been illustrated to provide a clear picture. The best state thatgivestheoptimimresulthasalsobeen stated. The tool Matrix Laboratory (MATLAB R2017a) has been used to carry out this proposed work based using the Levenberg Marquardt back propagation algorithm. The following section presents and exemplifies the results. Figure 5 Visualization of Designed Neural Network for LM Training. In this image, the neural network system can be observed that is set on the LM algorithm. Various layers can be seen to be connected and related. W is the value for branch weight for connection and bias value is denoted by b. Weights is further classified as Input weights: weights among the input layer and hidden layer and Layer Weights: that are the weights situated between concealed layer and neurons of output layer. Figure 6 Comparison between the predicted and actual solar irradiation employing the proposed model using LM training. The figures given above show the prediction system model for solar irradiation. A combined and superimposed analysis of actual and predicted solar irradiation has been shown in figure 6. It can be seen that the proposed system achieves a Mean Absolute Percentage Error (MAPE) or MAE% of just 2.76%. Figure 6.gives the plot diagram of performance.Thisis depictedas the function of performance and measure of repetitions. After 30 epochs the optimally best performance is found. The
  • 6. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1565 validating process entails supervision for validity and scope of subsequent increase in performance. If no such further possibility of betterment is conducive, it is not trained anymore and stopped. The outcomes are put forth for comparative analysis. Figure 7 Computed MSE value using the proposed LM trained Neural Network Figure 8 Regression plot during training, testing & validation for Proposed for Bayesian LM training algorithm The measure of correlation amongst the output metrics are done bytheR whichisthe Regressionvalue. WhenR is1,itsignifies a relation that is quite close and R as 0 conveys the relation to be loose and random. It can be seen from figure 5.4 that the overall regression of the proposed system is 0.948 which is prettycloseto1,therebyrenderingvalidationforthehighaccuracy achieved. The captured image of the training procedure has been shown as the neural network screen shot from MATLAB implementation in the Figure. 8. As follows- Figure 9 The training phase using the NN Tool
  • 7. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 @ IJTSRD | Unique Paper ID – IJTSRD43673 | Volume – 5 | Issue – 4 | May-June 2021 Page 1566 The following points can be noted about the designed ANN architecture. 1) There are 20 neurons in the hidden layer. The number of neurons in the hidden layer decides the efficacy with which the neural network can analyze a problem. The more the number of neurons in the hidden layer, more is the system’s computational caliber but the system complexity increases. The training algorithm used in the proposed system is the Levenberg-Marquardt back propagation algorithm. It is bothstable and fast thereby rendering accuracy and low time complexity to the proposed system. The number of validation checks is 6 which indicates the fact that the ANN architecture checks for any changes in the state of errors for 6 times before it ends training and starts testing. Figure 10 MAPE comparison with base paper Figure 11 Accuracy comparison with base paper 5. Conclusion: So in the given work, it has been tried to predict solar irradiation using Back Propagation in Artificial Neural Networks. The Levenberg-Marquardt back propagation algorithm has been used for the proposed approach. The number of neurons taken for the design is twenty though it can be varied. The proposed system attains an accuracy of 97.84% and a mean absolute percentage error (MAPE) of 2.76%. The following additional concluding points can be inferred. 1) Here the data collected in quantitythatcanalsobetermed as mining of data shows exhaustive trait. 2) The Levenberg-Marquardt (LM) Algorithm has also been used to test and train the ANN. This happens to be an efficient method that offers stable forecasting and also converges fast. It has been shown that the proposed technique achieves lesser errors and higher accuracy compared to contemporary techniques. The low error or high accuracy values can be validated using the regression of the proposed system which is 0.948 (approx). 6. References [1] L.SaadSaoud, F.Rahmoune,V.Tourtchine,K.Baddariin the paper “Fully Complex Valued Wavelet Neural Network for Forecasting the Global SolarIrradiation”, Springer 2016 [2] Ministry of New and Renewable energy, Government of India,“Annual Report2015-16”,http://mnre.gov.in, 2016. [3] Vishal Sharma, Dazhi Yang, Wilfred Walsh, Thomas Reindl in the paper “Short Term Solar Irradiance Forecasting Using A Mixed Wavelet Neural Network” Elsevier 2016 [4] Ozgur Kisi, ErdalUncuoghlu, “Comparison of three back propagation training algorithms for two case studies,” Indian Journal of Engineering & Materials Sciences, Volume 12, pp. 434-442, 2005. [5] E.M. Johansson, F.U. Dowla, and D.M. Goodman, “Backpropagation Learning for Multilayer Feed- Forward Neural Networks using The Conjugate Gradient Method,” International Journal of Neural Systems, Volume 02, pp. 291-302, 1991. [6] Martin FodsletteMøller, “A scaled conjugate gradient algorithm for fast supervised learning, Neural Networks,” Volume 6, pp. 525-533, 1993. [7] Zhao Yue; Zhao Songzheng; Liu Tianshi, "Bayesian regularization BP Neural Network model for predictingoil-gasdrillingcost,"BusinessManagement and Electronic Information (BMEI), International Conference on 13-15 May 2011, Volume 2, pp. 483- 487, 2011. [8] D.J.C. Mackay, “Bayesian interpolation”, Neural Computation, Volume 4, pp. 415-447, 1992. [9] SaadSaoud L, Rahmoune F, Tourtchine V, Baddari K (2013) Complex-valued forecasting of global solar irradiance. J Renew Sustain Energy 5(4):043124– 043145 [10] Mak KL, Peng P, Yiu KFC, Li LK (2013) Multi- dimensional complex-valued Gabor wavelet networks. Math Comput Model 58(11–12):1755– 1768 [11] Zainuddin Z, Pauline O (2011) Modified wavelet neural network in function approximation and its application in predictionoftime-seriespollutiondata. Appl Soft Comput 11:4866–4874 [12] Babu GS, Suresh S (2013) Meta-cognitive RBF Network and its projection based learning algorithm for classification problems.Appl SoftComput13:654– 666
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