Fault Location of Active Distribution Networks Based on the Golden Section Method

Haizhu Yang,Yiming Guo,Peng Zhang,Xiangyang Liu

doi:10.1155/2020/6937319

Abstract

Aiming at the problem of fault location in distribution networks with distributed energy resources (DERs), a fault location method based on the concepts of minimum fault reactance and golden section is proposed in this paper. Considering the influence of distributed energy resource supply on fault point current in distribution networks, an improved trapezoidal iteration method is proposed for load flow analysis and fault current calculation. This method only needs to measure the synchronous current of the distributed energy resource and does not need to measure the voltage information. Therefore, the investment in equipment is reduced. Validation is made using the IEEE 34-node test feeder. The simulation results show that the method is suitable for fault location of distribution networks with multiple distributed generators. This method can accurately locate the faults of the active distribution network under different conditions.

Highlights

With the development of society, more and more distributed energy resources (DERs) are connected to the distribution network, which leads to more and more applications of clean energy and brings huge economic benefits [1,2,3]. e integration of distributed generation (DG) and its synchronous operation with the power grid is one of the challenges we face [4,5,6]
E fault location method proposed in this paper combines the golden section method and the trapezoidal iteration technique to analyze the fault location of the active distribution network under different operating conditions [25]. is method eliminates the potential relationship between the accuracy of fault location and search step size
A method for fault location of active distribution networks is proposed. is method uses the golden section method to search for the minimum fault reactance value and converts the fault location problem into a search minimum problem

Summary

Introduction

With the development of society, more and more DERs are connected to the distribution network, which leads to more and more applications of clean energy and brings huge economic benefits [1,2,3]. e integration of distributed generation (DG) and its synchronous operation with the power grid is one of the challenges we face [4,5,6]. E impedance-based fault location method is one of the current research methods and has achieved good results in applications [18,19,20,21] This method does not solve the problem of active distribution network fault location. E fault location method proposed in this paper combines the golden section method and the trapezoidal iteration technique to analyze the fault location of the active distribution network under different operating conditions [25]. Is method eliminates the potential relationship between the accuracy of fault location and search step size This method only needs to collect the synchronous current vector of the DER, which reduces the equipment investment. E golden section method takes fewer test points to determine the minimum fault reactance value, which improves the accuracy and speed of calculation. E search is stopped when the allowable error is reached, and the fault distance is determined according to the interval m bi + ai

Active Distribution Network Fault Location

Simulation Analysis

Findings

Conclusions