电网短路电流计算及保护继电器调整研究

Research on Calculation of Short Circuit Current in Power Grid and Adjustment of Protection Relays

本文指出随着电力系统规模的不断扩大和电力设备的不断更新,电网短路电流计算及保护继电器调整问题日益凸显;电网短路电流的准确计算对于电力系统的设计、运行和保护具有至关重要的作用。为此,本文首先阐述了电源配电网短路电流计算方法,包括配电网模型、通用计算方法以及含分布式电源和多类型分布式电源的计算方法;其次研究了继电器保护的优化协调方法,采用微分进化算法进行了改进;最后在算例验证部分,利用C++程序在Xcode平台进行了验证,以确保所提方法的正确性。本研究能够为电力系统的稳定运行提供理论和方法方面的支持,对电力系统领域的相关研究起到促进作用。

This paper points out that with the continuous expansion of the power system scale and the continuous updating of power equipment,the problems of short-circuit current calculation and protection relay adjustment in the power grid are becoming increasingly prominent;the accurate calculation of short-circuit current in the power grid plays a crucial role in the design,operation,and protection of the power system.Therefore,this paper firstly elaborates on the calculation method of short-circuit current in power distribution networks,including distribution network models,general calculation methods,and calculation methods for distributed power sources and multiple types of distributed power sources;secondly,the optimization coordination method of relay protection is studied and improved using differential evolution algorithm;finally,in the example verification section,the proposed method is validated using a C++program on the Xcode platform,to ensure its correctness.This study can provide theoretical and methodological support for the stable operation of power systems,and promote relevant research in the field of power systems.