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Adaptive GPS Duty Cycling and Radio Ranging for Energy-efficient LocalizationRaja Jurdak
This paper addresses the tradeoff between energy consumption
and localization performance in a mobile sensor
network application. The focus is on augmenting GPS location
with more energy-efficient location sensors to bound position
estimate uncertainty in order to prolong node lifetime.
We use empirical GPS and radio contact data from a largescale
animal tracking deployment to model node mobility,
GPS and radio performance. These models are used to explore
duty cycling strategies for maintaining position uncertainty
within specified bounds. We then explore the benefits
of using short-range radio contact logging alongside GPS as
an energy-inexpensive means of lowering uncertainty while
the GPS is off, and we propose a versatile contact logging
strategy that relies on RSSI ranging and GPS lock back-offs
for reducing the node energy consumption relative to GPS
duty cycling. Results show that our strategy can cut the
node energy consumption by half while meeting applicationspecific
positioning criteria.
Adaptive GPS Duty Cycling and Radio Ranging for Energy-efficient LocalizationRaja Jurdak
This paper addresses the tradeoff between energy consumption
and localization performance in a mobile sensor
network application. The focus is on augmenting GPS location
with more energy-efficient location sensors to bound position
estimate uncertainty in order to prolong node lifetime.
We use empirical GPS and radio contact data from a largescale
animal tracking deployment to model node mobility,
GPS and radio performance. These models are used to explore
duty cycling strategies for maintaining position uncertainty
within specified bounds. We then explore the benefits
of using short-range radio contact logging alongside GPS as
an energy-inexpensive means of lowering uncertainty while
the GPS is off, and we propose a versatile contact logging
strategy that relies on RSSI ranging and GPS lock back-offs
for reducing the node energy consumption relative to GPS
duty cycling. Results show that our strategy can cut the
node energy consumption by half while meeting applicationspecific
positioning criteria.
A low voltage ride-through strategy using mixed potential function for three-...Asoka Technologies
This paper presents a new control strategy for low-voltage ride-through for 3-phase grid-connected photovoltaic systems. The proposed fault ride through control algorithm, which is designed based on mixed potential function, can protect the inverter from over current failure under both symmetric and asymmetric faults, reduce the double frequency oscillation and provides reactive power support by applying a voltage compensation unit. With the proposed method, the inverter can also inject sinusoidal current during asymmetric faults. The method does not require a hard switch to switch from the Maximum Power Point Tracking (MPPT) to a non-MPPT algorithm, which ensures a smooth transition.
Power Quality Assessment of Voltage Positive Feedback Based Islanding Detecti...Asoka Technologies
Islanding refers to a condition where distributed generators (DGs) inject power solely to the local load after electrical separation from power grid. Several islanding detection methods (IDMs) categorized into remote, active, and passive groups have been reported to detect this undesirable state. In active techniques, a disturbance is injected into the DG’s controller to drift a local yardstick out of the permissible range. Although this disturbance leads to more effective detections even in well-balanced island, it raises the total harmonic distortion (THD) of the output current under the normal operation conditions. This paper analyzes the power quality aspect of the modified sliding mode controller as a new active IDM for grid-connected photovoltaic system (GCPVS) with a string inverter. Its performance is compared with the voltage positive feedback (VPF) method, a well-known active IDM. This evaluation is carried out for a 1 kWp GCPVS in MATLAB/Simulink platform by measuring the output current harmonics and THD as well as the efficiency under various penetration and disturbance levels. The output results demonstrate that since the proposed disturbance changes the amplitude of the output current, it does not generate harmonics/subharmonics. Thereby, it has a negligible adverse effect on power quality. It is finally concluded that the performance of the sliding mode-based IDM is reliable from the standpoints of islanding detection and power quality.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09666155510, 09849539085 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
Enhancing power transfer capability of transmission lines without changing the line facilities is the need of the hour for practicing electrical engineers. As a solution to the problem, the possibility to load the EHV AC transmission lines very close to their thermal limits by transmitting usual ac along with dc super imposed on it is presented. The importance of proposed scheme is that the power transfer improvement is achieved without any alteration in the existing EHV ac line. The main goal is to gain the advantage of parallel ac–dc transmission and to load the line close to its thermal limit. The added dc power flow does not result in any transient instability. This gives the feasibility of converting a double circuit ac line into composite ac–dc power transmission line to get the advantages of parallel ac–dc transmission to improve stability and damping out oscillations. Simulation and experimental studies are carried out for the coordinated control as well as independent control of ac and dc power transmissions. No alterations of conductors, insulator strings, and towers of the original line are needed. The present situation demands the review of traditional power transmission theory and practice, on the basis of new concepts that allow full utilization of existing transmission facilities without decreasing system availability and security. Simultaneous ac–dc power transmission was first proposed through a single circuit ac transmission line. In these proposals Mono-polar dc transmission with ground as return path was used. There were certain limitations due to use of ground as return path. Moreover, the instantaneous value of each conductor voltage with respect to ground becomes higher by the amount of the dc voltage, and more discs are to be added in each insulator string to withstand this increased voltage. In this scheme, the dc power flow is point-to point bipolar transmission system. The proposed new methodology overcomes the problems and allows loading the line to its thermal limit, improving the revenue.
Single-Phase Grid-tied Transformerless Inverter of Zero Leakage Current for P...Asoka Technologies
Multi-level transformerless inverters are widely used in grid-tied PV systems since they characterized by higher efficiency and lower cost. In this context, new topologies, modulation, and control schemes were presented to solve problems of a common-mode voltage and leakage current. This work proposes a transformerless five-level inverter with zero leakage current and ability to reduce the harmonic output content for a grid-tied single-phase PV system. The neutral of the grid links to a common on which the negative and the positive terminals of the DC-link are connected via parasitic capacitors that can eliminate the leakage current. The proposed topology, with its inherent circuit structure, leads to boost the overall efficiency. Simulation and experimental results show almost zero leakage current and a high-quality output when maintaining balanced capacitor voltages on the DC-link input. The experimental results show 1.07% THD and 96.3 % maximum efficiency when injecting a power of 1.1 kW that verify the performance of the proposed inverter with PV sources.
Improving the Dynamic Performance of Wind Farms with STATCOMAsoka Technologies
When integrated to the power system, large wind farms can pose voltage control issues among
other problems. A thorough study is needed to identify the potential problems and to develop
measures to mitigate them. Although integration of high levels of wind power into an existing
transmission system does not require a major redesign, it necessitates additional control and
compensating equipment to enable (fast) recovery from severe system disturbances. The use of a
Static Synchronous Compensator (STATCOM) near a wind farm is investigated for the purpose
of stabilizing the grid voltage after grid-side disturbance such as a three phase short circuit fault.
The strategy focuses on a fundamental grid operational requirement to maintain proper voltages
at the point of common coupling by regulating the voltage. The DC voltage at individual wind
turbine (WT) inverters is also stabilized to facilitate continuous operation of wind turbines
during disturbances.
Potential game for energy efficient rss-based positioning in wireless sensor ...LogicMindtech Nologies
NS2 Projects for M. Tech, NS2 Projects in Vijayanagar, NS2 Projects in Bangalore, M. Tech Projects in Vijayanagar, M. Tech Projects in Bangalore, NS2 IEEE projects in Bangalore, IEEE 2015 NS2 Projects, WSN and MANET Projects, WSN and MANET Projects in Bangalore, WSN and MANET Projects in Vijayangar
FORECASTING OF RENEWABLE ENERGY PRODUCTION BY USING GENETIC ALGORITHM (GA) FO...u772020
My topic of thesis is about constructing prediction model of wind energy and solar energy by artificial neural network with genetic algorithm.
Because the electricity price in Nordic area is determined in advance, it is beneficial to construct prediction model for renewable energy. With the mentioned prediction model, we can construct hybrid system (wind energy and solar energy) to produce hydrogen. Then the fuel cell can produce electricity and connect to the network by using the constructed prediction model. In our prediction model, the critical parameters like 10 minutes average wind speed and deviation for wind energy could be used as historical data to train to artificial neural network (ANN). We also hope to utilize genetic algorithm (GA) to speed up the ANN training and hybrid system scale design.
JAVA 2013 IEEE NETWORKING PROJECT Harvesting aware energy management for time...IEEEGLOBALSOFTTECHNOLOGIES
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
Harvesting aware energy management for time-critical wireless sensor networksIEEEFINALYEARPROJECTS
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
A WSN primary outline issue for a sensor system is protection of the vitality accessible at every sensor node. We propose to convey different, versatile base stations to delay the lifetime of the sensor system. We split the lifetime of the sensor system into equivalent stretches of time known as rounds. Base stations are migrated toward the begin of a round. Our strategy utilizes a whole number straight program to focus new areas for the base stations and in view of steering convention to guarantee vitality proficient directing amid every round. We propose four assessment measurements and look at our answer utilizing these measurements. Taking into account the reproduction results we demonstrate that utilizing various, versatile base stations as per the arrangement given by our plans would altogether expand the lifetime of the sensor system.
A low voltage ride-through strategy using mixed potential function for three-...Asoka Technologies
This paper presents a new control strategy for low-voltage ride-through for 3-phase grid-connected photovoltaic systems. The proposed fault ride through control algorithm, which is designed based on mixed potential function, can protect the inverter from over current failure under both symmetric and asymmetric faults, reduce the double frequency oscillation and provides reactive power support by applying a voltage compensation unit. With the proposed method, the inverter can also inject sinusoidal current during asymmetric faults. The method does not require a hard switch to switch from the Maximum Power Point Tracking (MPPT) to a non-MPPT algorithm, which ensures a smooth transition.
Power Quality Assessment of Voltage Positive Feedback Based Islanding Detecti...Asoka Technologies
Islanding refers to a condition where distributed generators (DGs) inject power solely to the local load after electrical separation from power grid. Several islanding detection methods (IDMs) categorized into remote, active, and passive groups have been reported to detect this undesirable state. In active techniques, a disturbance is injected into the DG’s controller to drift a local yardstick out of the permissible range. Although this disturbance leads to more effective detections even in well-balanced island, it raises the total harmonic distortion (THD) of the output current under the normal operation conditions. This paper analyzes the power quality aspect of the modified sliding mode controller as a new active IDM for grid-connected photovoltaic system (GCPVS) with a string inverter. Its performance is compared with the voltage positive feedback (VPF) method, a well-known active IDM. This evaluation is carried out for a 1 kWp GCPVS in MATLAB/Simulink platform by measuring the output current harmonics and THD as well as the efficiency under various penetration and disturbance levels. The output results demonstrate that since the proposed disturbance changes the amplitude of the output current, it does not generate harmonics/subharmonics. Thereby, it has a negligible adverse effect on power quality. It is finally concluded that the performance of the sliding mode-based IDM is reliable from the standpoints of islanding detection and power quality.
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09666155510, 09849539085 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
Enhancing power transfer capability of transmission lines without changing the line facilities is the need of the hour for practicing electrical engineers. As a solution to the problem, the possibility to load the EHV AC transmission lines very close to their thermal limits by transmitting usual ac along with dc super imposed on it is presented. The importance of proposed scheme is that the power transfer improvement is achieved without any alteration in the existing EHV ac line. The main goal is to gain the advantage of parallel ac–dc transmission and to load the line close to its thermal limit. The added dc power flow does not result in any transient instability. This gives the feasibility of converting a double circuit ac line into composite ac–dc power transmission line to get the advantages of parallel ac–dc transmission to improve stability and damping out oscillations. Simulation and experimental studies are carried out for the coordinated control as well as independent control of ac and dc power transmissions. No alterations of conductors, insulator strings, and towers of the original line are needed. The present situation demands the review of traditional power transmission theory and practice, on the basis of new concepts that allow full utilization of existing transmission facilities without decreasing system availability and security. Simultaneous ac–dc power transmission was first proposed through a single circuit ac transmission line. In these proposals Mono-polar dc transmission with ground as return path was used. There were certain limitations due to use of ground as return path. Moreover, the instantaneous value of each conductor voltage with respect to ground becomes higher by the amount of the dc voltage, and more discs are to be added in each insulator string to withstand this increased voltage. In this scheme, the dc power flow is point-to point bipolar transmission system. The proposed new methodology overcomes the problems and allows loading the line to its thermal limit, improving the revenue.
Single-Phase Grid-tied Transformerless Inverter of Zero Leakage Current for P...Asoka Technologies
Multi-level transformerless inverters are widely used in grid-tied PV systems since they characterized by higher efficiency and lower cost. In this context, new topologies, modulation, and control schemes were presented to solve problems of a common-mode voltage and leakage current. This work proposes a transformerless five-level inverter with zero leakage current and ability to reduce the harmonic output content for a grid-tied single-phase PV system. The neutral of the grid links to a common on which the negative and the positive terminals of the DC-link are connected via parasitic capacitors that can eliminate the leakage current. The proposed topology, with its inherent circuit structure, leads to boost the overall efficiency. Simulation and experimental results show almost zero leakage current and a high-quality output when maintaining balanced capacitor voltages on the DC-link input. The experimental results show 1.07% THD and 96.3 % maximum efficiency when injecting a power of 1.1 kW that verify the performance of the proposed inverter with PV sources.
Improving the Dynamic Performance of Wind Farms with STATCOMAsoka Technologies
When integrated to the power system, large wind farms can pose voltage control issues among
other problems. A thorough study is needed to identify the potential problems and to develop
measures to mitigate them. Although integration of high levels of wind power into an existing
transmission system does not require a major redesign, it necessitates additional control and
compensating equipment to enable (fast) recovery from severe system disturbances. The use of a
Static Synchronous Compensator (STATCOM) near a wind farm is investigated for the purpose
of stabilizing the grid voltage after grid-side disturbance such as a three phase short circuit fault.
The strategy focuses on a fundamental grid operational requirement to maintain proper voltages
at the point of common coupling by regulating the voltage. The DC voltage at individual wind
turbine (WT) inverters is also stabilized to facilitate continuous operation of wind turbines
during disturbances.
Potential game for energy efficient rss-based positioning in wireless sensor ...LogicMindtech Nologies
NS2 Projects for M. Tech, NS2 Projects in Vijayanagar, NS2 Projects in Bangalore, M. Tech Projects in Vijayanagar, M. Tech Projects in Bangalore, NS2 IEEE projects in Bangalore, IEEE 2015 NS2 Projects, WSN and MANET Projects, WSN and MANET Projects in Bangalore, WSN and MANET Projects in Vijayangar
FORECASTING OF RENEWABLE ENERGY PRODUCTION BY USING GENETIC ALGORITHM (GA) FO...u772020
My topic of thesis is about constructing prediction model of wind energy and solar energy by artificial neural network with genetic algorithm.
Because the electricity price in Nordic area is determined in advance, it is beneficial to construct prediction model for renewable energy. With the mentioned prediction model, we can construct hybrid system (wind energy and solar energy) to produce hydrogen. Then the fuel cell can produce electricity and connect to the network by using the constructed prediction model. In our prediction model, the critical parameters like 10 minutes average wind speed and deviation for wind energy could be used as historical data to train to artificial neural network (ANN). We also hope to utilize genetic algorithm (GA) to speed up the ANN training and hybrid system scale design.
JAVA 2013 IEEE NETWORKING PROJECT Harvesting aware energy management for time...IEEEGLOBALSOFTTECHNOLOGIES
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.com-Visit Our Website: www.finalyearprojects.org
Harvesting aware energy management for time-critical wireless sensor networksIEEEFINALYEARPROJECTS
To Get any Project for CSE, IT ECE, EEE Contact Me @ 09849539085, 09966235788 or mail us - ieeefinalsemprojects@gmail.co¬m-Visit Our Website: www.finalyearprojects.org
A WSN primary outline issue for a sensor system is protection of the vitality accessible at every sensor node. We propose to convey different, versatile base stations to delay the lifetime of the sensor system. We split the lifetime of the sensor system into equivalent stretches of time known as rounds. Base stations are migrated toward the begin of a round. Our strategy utilizes a whole number straight program to focus new areas for the base stations and in view of steering convention to guarantee vitality proficient directing amid every round. We propose four assessment measurements and look at our answer utilizing these measurements. Taking into account the reproduction results we demonstrate that utilizing various, versatile base stations as per the arrangement given by our plans would altogether expand the lifetime of the sensor system.
AN OPTIMIZED WEIGHT BASED CLUSTERING ALGORITHM IN HETEROGENEOUS WIRELESS SENS...cscpconf
The last few years have seen an increased interest in the potential use of wireless sensor networks (WSNs) in various fields like disastermanagementbattle field surveillance, and border security surveillance. In such applications, a large number of sensor nodes are deployed, which are often unattended and work autonomously. The process of dividing the network into interconnected substructures is called clustering and the interconnected substructures are called clusters. The cluster head (CH) of each cluster act as a coordinator within the substructure. Each CH acts as a temporary base station within its zone or cluster. It also communicates with other CHs. Clustering is a key technique used to extend the lifetime of a sensor network by reducing energy consumption. It can also increase network scalability. Researchers in all fields of wireless sensor network believe that nodes are homogeneous, but
some nodes may be of different characteristics to prolong the lifetime of a WSN and its reliability. We have proposed an algorithm for better cluster head selection based on weights for different parameter that influence on energy consumption which includes distance from base station as a new parameter to reduce number of transmissions and reduce energy consumption by sensor nodes. Finally proposed algorithm compared with the WCA, IWCA algorithm in terms of number of clusters and energy consumption.
The Energy hole problem is a major problem of
data collection in wireless sensor networks. The sensors near the
static sink serve as relays for remote sensors, which reduce their
energy rapidly, causing energy holes in the sensor field. This
project has proposed a customizable mobile sink based adaptive
protected energy efficient clustering protocol (MSAPEEP) for
improvement of the problem of energy holes along with that we
also characterize and made comparison with the previous
existing protocols. A MSAPEEP uses the adaptive protected
method (APM) to discover the best possible number of cluster
heads (CHs) to get better life span and constancy time of the
network. The effectiveness of MSAPEEP is compared with
previous protocols; specifically, low energy adaptive clustering
hierarchy (LEACH) and mobile sink enhanced energy efficient
PEGASIS based routing protocol using network simulator(NS2).
Examples of simulation result show that MSAPEEP is more
reliable and removes the potential of energy hole and enhances
the stability and life span of the wireless sensor network(WSN).
An algorithm for fault node recovery of wireless sensor networkeSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
An optimal distance-based transmission strategy for lifetime maximization of ...LogicMindtech Nologies
NS2 Projects for M. Tech, NS2 Projects in Vijayanagar, NS2 Projects in Bangalore, M. Tech Projects in Vijayanagar, M. Tech Projects in Bangalore, NS2 IEEE projects in Bangalore, IEEE 2015 NS2 Projects, WSN and MANET Projects, WSN and MANET Projects in Bangalore, WSN and MANET Projects in Vijayangar
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
How libraries can support authors with open access requirements for UKRI fund...
Harvesting aware energy management for time-critical wireless sensor networks with joint voltage and modulation scaling
1. HARVESTING-AWARE ENERGY MANAGEMENT FOR TIME-CRITICAL WIRELES
SENSOR NETWORKS WITH JOINT VOLTAGE AND MODULATION SCALING
ABSTRACT:
As Cyber-Physical-Systems (CPSs) evolve they will be increasingly relied on to support time-
critical and performance- intensive monitoring and control activities. Further, many CPSs that
utilize Wireless Sensor Networking (WSN) technologies will require the use of energy
harvesting methods to extend their lifetimes. For this application class, there are currently few
algorithmic techniques that combine performance sensitive processing and communication with
efficient management techniques for energy harvesting. We first propose a general purpose,
multihop WSN architecture capable of supporting time-critical CPS systems using energy
harvesting.
We then present a set of Harvesting Aware Speed Selection (HASS) algorithms. Our technique
maximizes the minimum energy reserve for all the nodes in the network, thus ensuring highly
resilient performance under emergency or fault-driven situations. We present an optimal
centralized solution, along with an efficient, distributed solution. We propose a CPS-specific
experimental methodology, enabling us to evaluate our approach. Our experiments show that our
algorithms yield significantly higher energy reserves than baseline methods.
ECWAY TECHNOLOGIES
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