CAJ | 학술논문

提出一种基于站域保护的暂态电流极性比较的保护方案.该技术运用安装在配电网中每个变电站中专门设计的集成保护继电器,实现检测、分析处理因故障产生的暂态电流信号.通过集成继电器检测出因故障产生的故障电流分量信号,运用暂态电流极性识别算法来检出信号的极性;之后,通过比较来自与站点相连接的所有线路上的电流信号的极性就可以确定故障的方向;最后,通过对比来自网络中各站点的方向信息便可以确定故障的线路.通过仿真证明该方案是切实可行的.
제출일충기우참역보호적잠태전류겁성비교적보호방안.해기술운용안장재배전망중매개변전참중전문설계적집성보호계전기,실현검측、분석처리인고장산생적잠태전류신호.통과집성계전기검측출인고장산생적고장전류분량신호,운용잠태전류겁성식별산법래검출신호적겁성;지후,통과비교래자여참점상련접적소유선로상적전류신호적겁성취가이학정고장적방향;최후,통과대비래자망락중각참점적방향신식편가이학정고장적선로.통과방진증명해방안시절실가행적.
A transient current polarity comparison scheme based on substation integrated protection for distribution networks is presented. The technique is based on the detection and processing of fault generated transient current signals, in which specially designed integrated protection relays are installed at each substation of a distribution network. The relay detects the fault generated super-imposed current signals. The transient current polarity identification algorithm is then applied to the super-imposed signals to identify the polarity of the signal detected. The direction of a fault is determined by comparison of the polarity of the signals derived from all the line sections connected to the station. The actual fault line section is identified by comparing the directional information from all stations within the protected area. Simulation results presented demonstrate the feasibility of the scheme.