作　　者： ; ; ; ; ;

机构地区： 华南理工大学电力学院

出　　处： 《电力系统保护与控制》 2011年第11期133-137,共5页

摘　　要： 基于PSCAD/EMTDC软件建立了典型110kV双侧有源线路重合闸仿真模型,仿真研究表明影响重合闸的主要因素是联络线的初始有功功率和无功功率,常规检同期重合闸若要满足整定条件而动作就要求联络线初始有功潮流在很小的范围内然而正常运行中很难满足这一条件,重合闸基本不动作,导致双侧有源线路小电源侧频率崩溃、全站失压等严重后果。为提高110kV电网供电可靠性,从冲击电流的角度出发,分析研究了准同期重合闸方式的可行性,采用准同期重合闸方式可放宽频差的约束,大幅提高重合闸的动作几率。 This paper builds up a typical 110 kV bilateral active line AAR simulation mode based on PSCAD/EMTDC. Simulation results show the main factors affecting reclosing are the initial active and reactive power of the contact line,and in order to meet the setting conditions of same-period reclosing,the initial contact line active power should be in a small range,but this is difficult in normal operation and the reclosing hardly works,which results in frequency collapse or loss of voltage in entire substation and other serious consequences in the small power source side of bilateral active line. Therefore,to enhance the power supply reliability of 110 kV bilateral active lines,we analyze the feasibility of synchronism reclosing from the perspective of impact current. The synchronism reclosing can relax the constraints on the frequency difference,greatly increase the chance of reclosing.

关 键 词： 双侧有源线路 准同期重合闸 供电可靠性

领　　域： [电气工程]