电磁式电压互感器二次侧电压异常现象分析
Analysis of Abnormal Secondary Voltage Phenomenon in Electromagnetic Voltage Transformers
赵远阳 1崔艳玲 1胡景中 1杨云 1董平1
作者信息
- 1. 华能武汉发电有限责任公司,湖北武汉 430000
- 折叠
摘要
在发电厂不接地系统及35 kV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.
Abstract
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Key words
electromagnetic voltage transformer/voltage imbalance/third harmonic引用本文复制引用
出版年
2024
NETL
NSTL
万方数据