高抗三相不一致运行工况下的处置策略研究  

Research on Disposal Strateges for High-voltage Reactor under Three-phase Inconsistent Operation Condition

作　　者：甘毅力 黄晓冰 梁水康 廖世维 覃胜远 GAN Yili;HUANG Xiaobing;LIANG Shuikang;LIAO Shiwei;QIN Shengyuan(Guigang Power Supply Bureau of Guangxi Power Grid,Guangxi Guigang 537100,China;Guilin Power Supply Bureau of Guangxi Power Grid,Guangxi Guilin 530023,China)

机构地区：[1]广西电网有限责任公司贵港供电局,广西贵港537100 [2]广西电网有限责任公司桂林供电局,广西桂林530023

出　　处：《广西电力》2024年第3期28-34,共7页Guangxi Electric Power

摘　　要：通过建模分析计算,发现高抗三相不一致运行工况下中性点电抗器上流过的电流相比正常运行时的电流大很多,但故障电流值未能启动开关失灵保护越级跳闸时,有可能会导致高压电抗器故障进一步恶化,会使中性点电抗器超负荷运行,绕组过热、出现喷油、内部放电、造成电气设备中性点电抗器损坏,甚至发生火灾事故,产生经济损失。为了防止类似的故障发生,本文提出了高抗三相不一致运行工况下的处置策略与合理建议,从而避免高抗三相不一致运行工况下烧坏中性点电抗器的故障。Through modeling,analysis and calculation,it is found that the current through the neutral point reactor under the three-phase inconsistency operation condition is much larger than that during normal operation,but when the fault current value fails to start the breaker failure protection and trips,it may lead to further deterioration of the fault of the high-voltage reactor,including the overload of the neutral point reactor,the overheating of the winding,the fuel injection,the internal discharge,the damage to the electrical equipment of neutral point reactor,and even the fire accidents,which will result in economic losses.In order to prevent similar faults,disposal strategies and reasonable suggestions under the three-phase inconsistency operation condition are proposed,so as to avoid the burned-out of the neutral point reactor under the three-phase inconsistency operation condition.

关 键 词：三相不一致 开关拒动 处置策略 中性点电抗器 故障电流 

分 类 号：TM41[电气工程—电器]