电容器组早期故障在线智能预警方法  

Early Failure Online Intelligent Warning Method for Capacitor Bank

作　　者：陈晓宇[1,2] 郑建勇[1] 梅军[1] 

机构地区：[1]东南大学电气工程学院,江苏南京211100 [2]江苏金智科技股份有限公司,江苏南京211100

出　　处：《电力电容器与无功补偿》2015年第5期1-5,共5页Power Capacitor & Reactive Power Compensation

摘　　要：电容器组是电力系统中的重要设备,当其因各种原因发生单个元件损坏后,经常会逐步发展为严重故障,导致电容器组的损坏。为解决此问题,根据双星形电容器组早期元件损坏的理论特征分析,提出针对双星形电容器组早期内部元件故障全新的预警方法:初始矢量归零不平衡电流变化量法。该方法通过检测双星形电容器组2臂之间的电流,再结合三相电流,计算出不平衡电流变化量,并通过矢量比较,判断是否发生了故障。通过系统仿真的各种数据也验证了文中新的预警方法。该方法的应用方便了电容器组的运行管理,并为其早期故障的及时发现提供了新的途径。Power capacitor bank is an important device in power system,the damage of individual element due to various reasons will develop serious fault and lead to damage of capacitor bank. For solving this problem,in this paper,a complete new warning method for the early stage fault of internal element in double star capacitor bank is proposed in accordance with theoretical analysis of element damage of the capacitor bank at early stage： Imbalanced current variation method at initial vector to zero. The variation of imbalance current is calculated by way of detecting the current between two arms of the capacitor bank together with three-phase current,and the occurrence of the fault is judged through vector comparison.The new warning method is also verified by various data simulated by the system. Application of the method is convenient for the operation management of capacitor bank and provides new way in finding out the fault at early stage.

关 键 词：电容器故障预警 不平衡电流变化量 故障仿真 初值归零 在线监测 

分 类 号：TM53[电气工程—电器]