The effect of load current on a three-phase fault
The effect of load current on a three-phase fault
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负载电流对三相故障的影响
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Insu Kim
中科院分区：
文献类型：
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作者：
Insu Kim
大多数短路研究忽略了负载电流，因为故障电流的大小远远大于负载电流。然而，由于可变的和间歇性可调度的能量资源（诸如光伏系统、风电场和基于非线性电力电子的发电机）已经被部署到配电网，它们可能增加负载电流。也就是说，从它们流出的负载电流可以影响故障电流的大小。因此，本文的目的是分析负载电流的影响，从分布式能源的三相故障电流。为此，本研究开发了一种算法，增加了一个电气负载的正，负，和零序阻抗矩阵的等效阻抗的格式，并计算三相故障电流。为了验证在MATLAB中开发的算法，一个分布式能源和负载的配电网系统。然后，（1）在系统上产生三相故障，（2）改变电力负荷和分布式能源的容量以及电力故障的位置，（3）检查具有不同容量的负荷和分布式发电对三相故障的影响。
The most short-circuit studies ignore load current since the magnitude of fault current is extremely greater than that of load current. However, as variable and intermittently dispatchable energy resources such as photovoltaic systems, wind farms, and non-linear power electronics based generators have been deployed to distribution networks, they may increase load current. That is, load current that flows from them can affect a magnitude of fault current. Thus, the objective of this paper is to analyze the effect of load current that flows from a distributed energy resource on three-phase fault current. For this purpose, this study develops an algorithm that adds an electric load to positive-, negative-, and zero-sequence impedance matrices in the format of equivalent impedance and calculates three-phase fault current. To verify the algorithm developed in MATLAB, a distribution network system with a distributed energy resource and a load is presented. Then, this study (1) generates a three-phase fault on the system, (2) changes the capacity of an electric load and a distributed energy resource and the location of an electric fault, and finally (3) examines the effect of load and distributed generation with varying capacities on a three-phase fault.