变电站改造关键技术及模拟断路器制作方式研究

Research on Key Technologies for Substation Renovation and Manufacturing Methods of Simulated Circuit Breakers

以某35 kV/10 kV变电站为分析对象,通过采用负荷临时转接、小电流接地装置故障选线方法、电流互感器极性校验、单相接地故障选线算法、主变方向闭锁保护以及距离校验方法,改善传统变电站运行中的不足。研究表明,变电站在负荷转接中可以采用临时开闭所,故障选线分析可以运用故障限流谐波算法或故障电流基波选线算法。

This paper takes a 35 kV/10 kV substation as the analysis object.Through the use of temporary load transfer,small current grounding device fault line selection method,current transformer polarity verification,single-phase grounding fault line selection algorithm,main transformer direction blocking protection,and distance verification method,the shortcomings in traditional substation operation are ultimately improved.The final conclusion drawn from the research is that temporary switching stations can be used in load transfer in substations,and fault line selection analysis can use fault current limiting harmonic algorithm or fault current fundamental wave line selection algorithm.