Harmonic Analysis Considering DG Allocation and Load Growth in the Radial Distribution System

Christeen G Boktor Et Al

doi:10.17762/turcomat.v12i6.3381

Abstract

In the radial distribution system (RDS), the existence of nonlinear loads causes the generation of harmonic currents, which lead to a lot of problems in the system and equipment, such as electronic equipment is used to control the system due to its effectiveness and accuracy. But these are led to an increase in power losses, equipment will be damaged because of overloads, distortion in voltage and current waveforms. So, the importance of harmonic analysis is increased in the last researches and application for designing and determining its effect in the distribution system. Its benefit appears in finding how much the waveforms for voltage and current are distorted in all the buses in RDS. In this study, we will use the direct approach method to calculate harmonic load flow (HLF) analysis depending on two matrices BIBC and BCBV to determine the relationship between first branch current and bus injection, second branch current with bus voltage. This method is robust and more efficient in solving HLF. It will be applied on IEEE 34 bus system by using a hybrid optimization technique HPOGWO to determine the size for the distributed generated DG. Single, double, and triple units will inject to enhancement voltage profile considering load growth with harmonic sources (HRS) and comparing with the network without HRS.

Highlights

Our needs for Electrical Energy increase rapidly every day, its different application in work, industry, traveling, medical, residence and, so on, increase the electrical energy demand
The harmonic current induced in the system causes a lot of problems, which appear in the high losses, equipment damage interference in the communication system
The Direct Approach is used to solve the harmonic load flow (HLF) solution in radial distribution system (RDS), it approves it robust, efficient in large systems [6],[7]. analysis depending on two matrices BIBC and BCBV to determine the relationship between first branch current and bus injection, second branch current with bus voltage

Summary

Introduction

Our needs for Electrical Energy increase rapidly every day, its different application in work, industry, traveling, medical, residence and, so on, increase the electrical energy demand. The objective function focuses on the voltage profile enhancement and keeps the limit of voltages within 0.9 p.u up to 1.05 p.u. Simulation results four cases are discussed and applied in the 34_bus system, the direct approach will use to solve HLF and HPOGWO to find the best size of DGs units inserting in the system, comparing the results with HRS and without HRS considering single double and triple DG units to verify the ability of the method in solving the test system taking in account the load growth calculations, and the four cases are organized as follow:. 2. Without DG With HRS In table 1 right side shows the (Vmin) in the system the violation due to load growth occurs in the 7th year the effect of harmonic is appeared here and increases the voltage magnitude as shown, (V. bus) is the voltage in the buses before injection the calculations of HLF.

Result without DG with HRS year

Conclusion