摘要
该文分析了微网对配电网继电保护的影响,提出含微网配电网的保护所面临的问题和要求,针对这些要求提出一套含微网配电网的保护方案。方案利用双斜率差动保护、比相继电保护和距离保护结合起来的保护方法很好地避免了微网双向潮流的特性所带来影响,解决了传统配电网保护方法对区内高阻故障灵敏度不高的问题,同时避免了区外故障误动。最后在PSCAD/EMTDC软件中搭建模型进行仿真,验证了所提方法的可靠性以及有效性。
In this paper,the characteristics of microgrid and its influence on the relay protection of distribution network are analyzed,and the problems and requirements of protection of microgrid distribution network are put forward.Aiming at these requirements put forward a set of containing microgrid protection scheme of the distribution network.The scheme combining the dual slope differential protection,phase-comparison protection and distance protection to get a better method.It avoids the influence of the characteristics of the twoway flow of the microgrid,and solves the traditional distribution network protection method for distribution network the high impedance fault of sensitivity is not high,at the same time avoid the fault zone misoperation.Finally,the simulation is done in the PSCAD/EMTDC software to verify the reliability and effectiveness of the proposed method.
出处
《电子质量》
2017年第6期22-26,共5页
Electronics Quality
关键词
微电网
差动电流保护
距离保护
Microgrid
differential current protection
distance protection
