含分布式电源的配电网自适应继电保护方法

Adaptive Relay Protection Method of Power Distribution Network with Distributed Power Supply

常规含分布式电源的配电网继电保护方法仅限于较小的保护区域,应用范围较小。为此,文章提出含分布式电源的配电网自适应继电保护方法。依据配电网结构,计算保护时间并确定反时限系数,以求解整定值。结合继电器运行数据,构建预测模型保护动作,并引入似真度函数确定故障类型,提出针对性的继电保护策略。实例应用结果显示,所提方法可以有效扩大继电保护区域,应用效果较好。

The conventional relay protection method for distribution network with distributed power supply is limited to a small protection area and has a small application range.Therefore,this paper proposes an adaptive relay protection method for distribution network with distributed power supply.According to the distribution network structure,the protection time is calculated and the inverse time coefficient is determined to solve the setting value.Combined with relay operation data,a predictive model protection action is constructed,and the likelihood function is introduced to determine the fault type,and a targeted relay protection strategy is put forward.The application results of an example show that the proposed method can effectively expand the relay protection area and the application effect is good.