基于配电网原故障定位方案的分布式电源准入容量研究

发布时间：2018-04-11 15:48

本文选题：有源配电网 + 分布式电源　；参考：《电网技术》2014年08期

【摘要】：为解决由于分布式电源(distributed generation,DG)接入而导致的传统配电网故障区段定位方案不再适用的问题,提出一种通过限制DG接入容量,保证传统故障区段定位方案可用的方法。首先简述了传统故障区段定位方案以及DG故障电流的计算方法;然后分析了DG接入对传统配电网故障区段定位方案的影响,提出了保证原有故障区段定位方案适用时,系统电源提供的最小短路电流与DG提供的最大反向短路电流应满足的要求,因为两者均与DG的接入容量相关,所以上述要求相当于对DG的最大接入容量作出限制。算例表明,限制DG的接入容量,基于短路计算可设置合理的开关定值来区分系统电源提供的最小短路电流及DG提供的最大反向短路电流,保证传统的故障区段定位方案可用。与其他开关定值设置方法的对比表明,直接基于短路电流计算,会提高DG的接入容量或者馈线的供电长度。
[Abstract]:In order to solve the problem that the traditional fault section location scheme is no longer applicable due to the distributed generation distributed generation (DG) access, a method is proposed to ensure the availability of the traditional fault section location scheme by restricting the DG access capacity.This paper first introduces the traditional fault section location scheme and the calculation method of DG fault current, then analyzes the influence of DG access on the traditional distribution network fault section location scheme, and puts forward the method to ensure the applicability of the original fault section location scheme.The minimum short-circuit current provided by the system power supply and the maximum reverse short-circuit current provided by DG should meet the requirements, because both of them are related to the access capacity of the DG, so the above requirements are equivalent to limiting the maximum access capacity of the DG.The example shows that the minimum short-circuit current provided by the power supply of the system and the maximum reverse short-circuit current provided by DG can be distinguished by setting reasonable switching values based on the short-circuit calculation to ensure the availability of the traditional fault section location scheme.The comparison with other switching setting methods shows that the direct calculation based on short-circuit current can increase the access capacity of DG or the power supply length of feeder.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);国家电网山东电力检修公司;中国电力科学研究院;
【分类号】：TM711

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