电测与仪表2017，Vol.54Issue(20)：50-55,115,7.
一种光伏电站送出线路自适应距离保护方法
Research on a method of adaptive distance protection for transmission line of photovoltaic power station
摘要
Abstract
An adaptive distance protection method is proposed for the problem that photovoltaic (PV) power station side distance protection on the transmission line of PV power station affected by the transition resistance. Comparative analysis is conducted on the different influence principles of transition resistance on the traditional bilateral power lines and the transmission line of PV power station distance protection. A new adaptive distance protection criterion is de-rived from the geometric relationship of the phase diagram of distance protection measured impedance offset affected by transition resistance and adaptive tuning factor based on the acquisition of additional impedance inclined angle is add-ed in the criterion. The function relation between the inclined angle and the current amplitude ratio and the phase difference between the two sides of the fault line is derived by formula derivation, and a new method of adaptive dis-tance protection for the transmission line of PV power station is proposed. Finally, in Dig SILENT/ Power Factory soft-ware, comparative simulation research is conducted on the action situation of distance protection of the PV power sta-tion side with different fault types under both traditional distance protection and improved distance protection. The simulation results show that the proposed method can greatly improve the effect of transition resistance on the distance protection of the transmission line of PV power station, and therefore, the feasibility of the proposed method is veri-fied.关键词
光伏电站送出线路/过渡电阻/自适应距离保护/继电保护Key words
transmission line of photovoltaic power station/transition resistance/adaptive distance protection/relay protection分类
信息技术与安全科学引用本文复制引用
孙苗苗,王慧,朱晓荣..一种光伏电站送出线路自适应距离保护方法[J].电测与仪表,2017,54(20):50-55,115,7.基金项目
中央高校基本科研业务费专项资金资助项目(2017MS098) （2017MS098）
