The document discusses the importance of reactive power compensation in radial distribution systems to mitigate voltage drops, power losses, and improve power factors by optimally installing shunt capacitors. It presents a method for identifying suitable locations and sizing for these capacitors to enhance voltage profiles, validated through a radial distribution test system. The project also acknowledges contributors and references relevant academic literature on the subject.

1. Reactive power compensation in radial distribution system.
Abdulrhman Qahtani , Yahya Jada , Muaad Mabrook , Tawfiq Almaliki , Abdulrhman Otudi
Department of Electrical Engineering, College of Engineering, JAZAN University, Senior Project 1441H -2020 AD
Supervisor: Prof. EhabSalim
Abstract
In distribution networks reactive power flow
causes large voltage drop, high power losses
and low power factor. These effects can be
reduced by optimally installing of shunt
capacitors. Compensation of reactive power
presents the basic role in power system
planning to provide compatible locations of the
compensation apparatus to guarantee the
minimum cost of compensation with suitable
voltage profiles. The optimal allocations and
sizing of capacitors in distribution systems are
introduced in this project. First the most
candidate buses for installing capacitors are
suggested using certain index. Then cost
function is used to deduce the locations of
capacitors and their sizing from the elected
buses. The results are discussed to prove the
effectiveness of the suggested algorithm to
enhance the voltage profiles for distribution
system.
1. Introduction
The electric power system of highly
complex systems and consists of three
main parts:
1.1 Generation
1.2 Transmission lines
1.3 Distribution system
7. Conclusion
In this project, LSF has been successfully
coordinated with the try and error method for
optimal location and sizing of shunted
capacitors in distribution system. The designed
problem has been formulated as an objective
optimization task, computing the cost of
installation, injected VARs, total power losses,
operations, and maintenance. The effectiveness
of the suggested approach is clarified by using
radial distribution test system.
8. Thanks and appreciation
We extend our thanks and appreciation to
everyone who supported us and help us in
completing this project, headed by his
Excellency Professor Ehab Salem Salama, as
well as those who discussed and provided us
with advice and guidance, including Dr. Sami
Al-Otaibi and Dr. Bilal Dhouib.
9. References
[1] A.Y. Abdelaziz ,E. S. Ali and S. M. Abd
Elazim, “Flower Pollination Algorithm and
Loss sensitivity Factors for Optimal Sizing and
Placement of capacitors in Radial Distribution
System”, Int. J. of Electrical Power and Energy
Systems (IJEPES Elsevier), Vol. 78 C, June
2016, pp. 207-214.
[2] E.S. Ali , S.M. Abd Elazim , A.Y.
Abdelaziz " Ant Lion Optimization Algorithm
for Renewable Distributed Generations" , Int.
J. of Energy (IJEPES Elsevier), Vol. 116 , oct
2016, pp. 445-458.
[3] K.R. Devabalaji , K. Ravi , D.P. Kothari , "
Optimal location and sizing of capacitor
placement in radial distribution system using
Bacterial Foraging Optimization Algorithm" ,
Int. J. of Electrical Power and Energy Systems
(IJEPES Elsevier), Vol. 17 , Mar 2015, pp.
383–390.
3. Improvement of electrical
performance
3.1 Capacitor placement.
3.2 Distributed generation (DG).
3.3 Reconfiguration the network.
4. Index of capacitive location
4.1 Loss Sensitivity Factor (LSF).
We used this index for our project.
4.2 Voltage Stability Index (VSI).
4.3 Power Loss Index.
4.4 Stability Index.
5. Load flow constraint
Traditional methods such as Newton Raphson
and Gauss Seidel cannot be used in distribution
system due to ill condition Forward sweep
algorithm has been introduced by Das to solve
load flow problem of distribution systems.
6. Result
❖ Bus 6 and Bus3:
3.3.1
2. Types of Distribution System
2.1 Radial distribution system.
2.2. Ring Main.
2.3.3 Parallel feeders distribution.
2.4 Mesh system