首页>
外国专利>
CONTROL METHOD OF GROUND FAULT CURRENT SUPPRESSION DEVICE OF DISTRIBUTION LINE AND GROUND FAULT CURRENT SUPPRESSION DEVICE OF DISTRIBUTION LINE
CONTROL METHOD OF GROUND FAULT CURRENT SUPPRESSION DEVICE OF DISTRIBUTION LINE AND GROUND FAULT CURRENT SUPPRESSION DEVICE OF DISTRIBUTION LINE
展开▼
机译：配电线路接地故障电流抑制装置的控制方法及配电线路接地故障电流抑制装置的控制方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
PROBLEM TO BE SOLVED: To let a ground directional protective relay operate stably by setting a proper compensation capacitance of a compensation reactor according to a state of a system.;SOLUTION: A ground fault current suppression system includes a reactor 45 and a neutral point grounding resistor NGR 46 provided on a substation bus 50. A reactor current is distributed to each of feeders 51, 52, 53 via a first CT 452 according to a line charging current and a current of the NGR 46 is equally distributed to each of the feeders 51, 52, 53 via a second CT 462. In this system, a line-to-ground capacitance C after system switching is obtained based on information obtained from a distribution automated system 21, a line-to-ground charging current Ic is obtained based on the line-to-ground capacitance C, and a reactor current IL is obtained by multiplying the line-to-ground charging current Ic by ratio k, which is obtained by dividing a line-to-ground charging current IT obtained by an artificial ground fault test by a charging current IN obtained from a normal system. Then, the compensation capacitance of the reactor 45 is set so as to become the compensation capacitance corresponding to the reactor current IL.;COPYRIGHT: (C)2010,JPO&INPIT
展开▼
机译：解决的问题：通过根据系统的状态设置补偿电抗器的适当补偿电容，使接地保护继电器稳定运行;解决方案：接地故障电流抑制系统包括电抗器45和中性点接地电阻NGR 46设置在变电站总线50上。根据线路充电电流，通过第一CT 452将电抗器电流分配给每个馈线51、52、53，并且NGR 46的电流均等地分配给每个馈线51、52、53经由第二CT462。在该系统中，系统切换后的线对地电容C基于从配电自动化系统21获得的信息获得，线对地充电电流I c 是基于线对地电容C得出的，电抗器电流I L 是通过将线对地充电电流I c < / Sub>除以比率k，该比率是通过将行对地的行距除以得到的通过从正常系统获得的充电电流I N ，通过人工接地故障测试获得的电流I T 。然后，将电抗器45的补偿电容设定为与电抗器电流I L 对应的补偿电容。COPYRIGHT：（C）2010，JPO＆INPIT
展开▼
