电磁式电压互感器二次侧电压异常现象分析  

03Analysis of Abnormal Secondary Voltage Phenomenon in Electromagnetic Voltage Transformers

作　　者：赵远阳 崔艳玲 胡景中 杨云 董平 ZHAO Yuanyang;CUI Yanling;HU Jingzhong;YANG Yun;DONG Ping

机构地区：[1]华能武汉发电有限责任公司,湖北武汉430000

出　　处：《电力系统装备》2024年第6期136-138,共3页Electric Power System Equipment

摘　　要：在发电厂不接地系统及35kV以下变电站中运行着大量电磁式电压互感器,当一次系统电气量参数不对称及电压互感器特性不一致时,会导致电压互感器二次侧电压存在较大不平衡。电压互感器一次侧中性点接地方式不合理也会对二次侧电压有直接影响,导致可能存在高次谐波分量。这些异常的电压量会对二次侧用户设备保护执行、电压调节等产生影响,对此,文章着重讨论上述异常现象中,对电压互感器二次侧电压的影响。There are a large number of electromagnetic voltage transformers operating in ungrounded systems of power plants and substations below 35 kV.When the electrical parameters of the primary system are asymmetric and the characteristics of the voltage transformers are inconsistent,it can lead to significant voltage imbalance on the secondary side of the voltage transformers.The unreasonable grounding method of the primary neutral point of the voltage transformer can also have a direct impact on the secondary voltage,and there may be high-order harmonic components.These abnormal voltage levels will have an impact on the implementation of secondary side user equipment protection,voltage regulation,etc.This article focuses on discussing the impact of these factors on the secondary side voltage of voltage transformers.

关 键 词：电磁式电压互感器 电压不平衡 三次谐波 

分 类 号：TM451[电气工程—电器]