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Study on short-circuit calculation model of distributed generators and fault analysis method of power system with distributed generators
Author(s): 
Pages: 1-9
Year: Issue:  22
Journal: Relay

Keyword:  distributed generatordoubly-fed induction generatorinverter interfaced distributed generatorfault current characteristicfault analysis method;
Abstract: 分布式电源的发电模式及并网方式多样,其馈入电网的故障电流特性与传统交流同步发电机相比存在较大差异,使以传统交流同步电机供电电源为基础的短路电流分析理论和方法难以满足分布式电源接入后电网故障分析的要求,给继电保护原理研究和整定计算提出了新的课题并备受关注.根据不同类型分布式电源的低压穿越运行技术要求,建立逆变型电源的短路计算模型.并考虑异步型电源撬棒保护的动作行为特征,建立了异步型电源在电网严重和非严重故障条件下的等值计算模型.进而,提出了含分布式电源接入的电网故障计算方法.仿真对比分析表明,电网故障计算方法精度较高,能更好地满足工程应用要求.
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