This document outlines the contents, introduction, literature review, problem identification, objective, proposed methodology, and conclusions of a project related to microgrids and power quality improvement. The objectives are to design an SRF-based control algorithm for a DSTATCOM to reduce total harmonic distortion through simulations. Harmonics from nonlinear loads reduce power quality in microgrids. The methodology involves detecting harmonic current, generating a reference signal, producing switching pulses, and injecting a compensating current to mitigate harmonics.

1. CONTENTS
INTRODUCTION
LITERATURE REVIEW
PROBLEM IDENTIFICATION
OBJECTIVE OF THE PROJECT
PROPOSED METHODOLOGY
RESULTS AND DISCUSSIONS
CONCLUSIONS
FUTURE SCOPE
REFRENCES
1

2. INTRODUCTION
2

3. Microgrids
Energy is the most basic need for the social exercises on our
reality. So for full fulfilling power demand due to increasing load
hybrid ac/dc micro-grid is best solution
Hybrid power age framework is acceptable and viable answer for
power age than traditional energy assets. It has more prominent
productivity. For fulfilling power demand. From Parallel work with
traditional power plant.
But due to increasing nonlinear load and converter for convert
power from micro grid to grid side harmonics increase in system.
Our main target is to reduce THD from system by used of
DSTATCOM.
3

4. Microgrids
 Microgrids are grid structures that encourage the use of renewable
and environmentally friendly energy sources and can allow
maximum use of sustainable energy with demand-side management.
 It is a high quality, uninterrupted, reliable electrical network that
provides energy to the loads, which can be easily controlled together
with distributed energy generation resources.
 The difference of micro grids from traditional grids is that it is a grid
based on renewable energy sources.
 Since micro grids are closer to the consumer, transmission,
distribution and operational maintenance costs are very low.
 The introduction of power electronics converters into the system
both affects the power quality of the system it is connected to and
brings new regulations
4

5. LITERATURE REVIEW
5

6. 6
No. Title Name of
Author
Publication Conclusion
1. Tie line Controls in
Micro grid
Applications
S. Bose, Y. Liu,
K. Bahei-Eldin,
J.de Bedout, and
M. Adamiak
IREP Aug.
2007.
Micro grid is constructed by integrating a
group of modules and parallel distributed
generation systems. Micro grids have
broad power capability and greater
versatility of control that meets both the
system's stability and the power efficiency
requirements.
2. Microgrid: A
conceptual solution
R. H. Lasseter
and P. Paigi
IEEE
2016
The latest microgrid deployment requires
demand sources, deliberate islanding
approvals and the use of usable heat
energy from power generating systems
3. Power Management
Strategies for a Micro
grid with Multiple
Distributed Generation
Units
F. Katiraei and
M. R. Iravani
IEEE
2016
Micro grid is an appealing choice from a
grid perspective, as it understands that the
energy structure of the country is
comprehensive, outdated and can improve
very slowly.
LITERATURE REVIEW

7. No. Title Name of Author Publication Conclusion
4 Micro grid Protection H. Nikkhajoei, R. H.
Lasseter
International Journal of
Advanced Research in
Electrical,
Electronics and
instrumentation
Engineering,
Volume:05
Issue:5 May 2016
a new framework for
distributed generation
operations. It is
reasonable to consider
the infrastructure micro
grid as a controllable
power system cell. In
the case of micro grid
failures, the main
utility can be separated
as soon as possible
from the delivery
portion.
5 Control Strategies of
Micro grid with Hybrid
DC and AC Buses
Bo Dong, Yongdong
Li, ZhixueZheng, Lie
Xu
EPE'11, 14thEuropean
Conf., pp. 1-8, 2011.
Sustainable energy
supplies are of a very
fluctuating nature, and
it is also very difficult
to create and consume
these supplies.
Therefore, modern
sustainable energy
systems with greater
versatility and
reliability must be
planned
7

8. 8
No. Title Name of Author Publication Conclusion
6 Power Quality
Improvement Using
Hybrid Filters for the
Integration of Hybrid
Distributed
Generations to the
Grid
K. Dharageshwari, C.
Nayanatara
International Journal of
Science and Research
(IJSR) ISSN (Online):
2319-7064, Volume 4
Issue 2, February
2015.
This paper proposes
the fuel cell and solar
cell integration with
the aid of MATLAB
software, the
harmonics produced by
the load is eliminated
and reactive power
compensation is
achieved by the use of
hybrid filter
7 STATCOM control for
power system voltage
control applications
P. Rao, M. L. Crow
and Z. Yang
IEEE Transactions on
Power Delivery, vol.
15, no. 4, pp. 1311-
1317, Oct. 2000.
In this paper the
different topologies of
distribution static
compensator, the
DSTATCOMs are
installed in the
distribution system for
the reduction of
harmonics ,
compensation of
reactive power, neutral
current compensation.

9. 9
No. Title Name of Author Publication Conclusion
8 Performance Analysis
of Photovoltaic based
DSTATCOM using
SRF and IRPT Control
Theory
Gunjan Varshney International Journal of
Emerging Technology
and Advanced
Engineering,
Volume:04
Issue: 5 May 2015.
The photovoltaic ( pv )
system serves to
maintain the tension
required for the DC
connection. In reactive
power compensation it is
possible to achieve the
improvement in power
efficiency by adjusting
the power factor. In this
journal, the efficacy of
DSTATCOM is
demonstrated using
Power Factor Correction
(PFC) and Zero Voltage
Regulation (ZVR) d-q
and P-Q equilibrium
designs. The efficacy of
DSTATCOM based on
PV is confirmed with
simulation tests.

10. PROBLEM IDENTIFICATION
10

11. PROBLEM IDENTIFICATION
 MPPT is the solution to the problem of automatically finding the
VMPP or IMPP of the PV panel at which the PV panel will be at
its PMPP at the given solar irradiance and temperature level.
 The large scale use of power electronics equipment has led to
increase in Harmonics in the power system i.e. nonlinear loads
generate harmonic current.
 These current harmonics will result in a power factor reduction,
decrease in efficiency, power system voltage fluctuations and
communications interference, So harmonics can be considered as a
pollutant which pollutes the entire power system.
 DSTATCOM are introduced which compensate for the harmonics
and reduces the Total Harmonic Distortion.
11

12. OBJECTIVE OF THE PROJECT
12

13. OBJECTIVE OF THE PROJECT
• Designing of SRF based control algorithm for DSTATCOM
reducing the total harmonic distortion. Simulations are done
• To study the various power quality problems in different industries
and electrical power system.
• Analyse the percentage harmonic reduction in the source current due
to the use of the DSTATCOM
• Percentage harmonic reduction with and without DSTATCOM
• Design hybrid AC/DC microgrid using PV array and battery
13

14. PROPOSED METHODOLOGY
14

15. So the process comprises of –
Detecting the harmonic component present in the line current
Generating the reference signal
Producing the switching pulses for the power circuit
Generating a compensating current and injecting it back to the line
PROPOSED METHODOLOGY
15

16. WHAT IS MICROGRID?
 It is a small-scale power supply network that is designed to provide
power for a small community.
 It enables local power generation for local loads.
 It comprises of various small power generating sources that makes it
highly flexible and efficient.
 It is connected to both the local generating units and the utility grid
thus preventing power outages.
 Excess power can be sold to the utility grid.
16

17. Common simple DC Stand Alone
system
 Common applications include water pumps and fans
 DC load is matched and directly connected to a PV array
 Uses no energy storage
 Load only operates when sun is shining, also referred to as a “day
use system”.

18. Stand Alone DC system with
batteries
 A direct current system that feeds DC appliances with storage
batteries.
 The basic components are a PV module, charge controller, storage
batteries, and a load (DC appliance).
 To operate loads at night a system must include a means of storing
energy

19. DC Stand Alone systems serving DC and
AC loads
A Stand Alone system can provide power for both AC and DC
loads.
A thorough load analysis considering both factors and their time of
use, will determine the requirements for the quantity of modules and
batteries to put in place.

20. Stand Alone DC system for AC
loads
 Stand-alone DC systems for AC loads must include an inverter,
which draws DC power from the battery bank and converts it to AC
power for distribution.
 The size and cost of any stand alone system is related to the
magnitude and duration of the electrical load and the solar resource,
energy efficiency is critical. For these reasons, a thorough load
analysis is required in the design and installation of any stand-alone
system.