【摘要】 广域信息采集易受干扰而出现信息丢失或信息畸变,现有广域保护理论对此考虑不足,文中提出了一种高容错性的广域后备保护算法,用于变电站集中式后备保护。集中式后备保护系统根据本站元件电压、电流信息计算得到的故障方向信息和故障距离信息,以及从相邻变电站收集到的故障方向信息和故障距离信息,通过容错判别来确定故障位置。算例表明,当保护范围内任何一个保护元件误动、拒动或其故障信息丢失时不会造成后备保护系统的错误判别。该算法简单可靠,具有极高的容错性。更多还原

【Abstract】 Wide area information is easily lost and distorted caused by disturbance,which is not fully considered in current wide area protection principle.A wide area backup protection algorithm with high fault-tolerance performance is proposed to implement the centralized substation backup protection system(CSBPS).CSBPS can locate the fault element with fault-tolerance judgment according to fault direction and fault distance information calculated with currents and voltages measured from electric elements of local substation and collected from the adjacent substations.The results of a case study show that no uncorrected judgment happens to CSBPS in case any one of protection elements mal-operates,fails to operate or loss of fault information.The proposed algorithm is simple and reliable with good fault-tolerance capability.更多还原