含有分布式电源电网的故障特性影响因素分析  

Analysis of the Influence Factors of Fault Characteristics of the Power Network with Distributed Generations

作　　者：杨帅[1] 王双杰 

机构地区：[1]内蒙古工业大学电力学院,呼和浩特010080 [2]内蒙古超高压供电局,呼和浩特010080

出　　处：《电气技术》2015年第4期22-25,38,共5页Electrical Engineering

摘　　要：本文在PSCAD/EMTDC中建立并入电网的分布式电源仿真模型,仿真了分布式电源自带故障限流器、不同种类的发电机和中性点不同接地方式时分别发生故障情况时的故障特性,得知进行保护配置和整定时,应该考虑到分布式电源和电力电子接口器件自身的保护作用;异步发电机在系统发生故障时,故障特性会与同步电机有很大不同;分布式电源并网后,系统发生故障时的故障特性与系统的中性点接地方式有关;在异步风力发电机作为分布式电源的情况下,故障时在分布式电源侧检测到的故障电流几乎全部为零序故障电流,非故障相电流与故障相电流近乎相同,使保护的正确动作受到很大影响。Building up a simulation model of distributed generators adding into the power grid in PSCAD/EMTDC. Simulating the fault features of distributed generators with fault current limiter, different types of generators and neutral point grounding method.Knowing that the relay configuration and the match problem should consider the protection of the distributed generators and its power electronic interface device; Asynchronous generator and synchronous motor have different fault characteristics when fault occurs;Fault features associate with the neutral point grounding way of system;In the case of asynchronous wind power generator as a distributed power supply, the fault currents at distributed generators side nearly same to zero sequence current, the fault phase current and the fault phase current is almost same to each other.

关 键 词：IIDG 故障特性 PSCAD仿真 保护配置 

分 类 号：TM73[电气工程—电力系统及自动化]