1000 kV电容式电压互感器临近效应对统计线损的影响

Influence of 1 000 kV Capacitor Voltage Transformer Proximity Effect on Statistical Line Loss

电容式电压互感器(CVT)在电能计量及线路统计线损测量过程中存在多种误差因素,其中临近效应引起的误差不可忽视。通过分析临近效应产生的误差对电容式电压互感器总误差的贡献,讨论了电容式电压互感器总误差对统计线损的影响程度,推导了临近效应误差与统计线损的传递关系,并以晋东南—南阳—荆门特高压线路为例进行了数字仿真,验证了推导结果的正确性,为特高压系统CVT的误差分析提供了参考。

Proximity effect which is one of many error factors of capacitor voltage transformer is indispensable in energy measurement and line loss statistics. This paper examined the contribution of proximity effect to CVT total error. And then the impact of CVT total error on statistical line loss was considered. The relationship between proximity effect and statistical line loss was obtained. Taking Jindongnan-Nanyang-Jingmen UHV line for an example,the digital simulation was run to prove the correctness of the proposed method. The research provides reference for CVT error analysis.