同杆并架双回线继电保护工程应用实践

同杆并架双回输电线路由于其良好的经济性，在220 kV输电线路上得到了广泛的推广，但由于其结构上的特殊性，故障情况十分复杂，现有的继电保护功不能很好地适应其发展。在洛阳牡－马同杆并架双回输电线路工程实践中，通过对双回输电线路进行深入研究，采用基于故障分量方向的综合选相元件、基于六相序阻抗的距离保护原理、自适应重合闸判据及顺序重合策略、横联差动保护，并能够实现五相运行、“准三相”及其运行情况下各项后备保护功能。

Application of relay protection for double-circuit lines on the same pole

Double-circuit lines on the same pole, as a result of its good efficiency, obtains the widespread promotion on the 220 kV transmission line.Because of the special structure of double-circuit lines,the situation of fault is complex.The existing relay protection function is not suitable for the development.By analyzing the project in Luoyang Mu-Ma double-circuit lines on the same pole,a new double-circuit lines protection device with many features and advantages is researched,which has phase selecting based o...