电力系统及其自动化学报2017，Vol.29Issue(11)：138-142,5.DOI:10.3969/j.issn.1003-8930.2017.11.023
110 kV电容式电压互感器波形异常及影响因素分析
Analysis of Waveform Distortion and Related Influencing Factors for 110 kV Capacitor Voltage Transformer
摘要
Abstract
This paper focuses on the problem of output waveform distortions of 110 kV capacitor voltage transformer (CVT)in a smart substation,and tries to reduce the economic loss caused by CVT damage. According to theoretical analysis,the output waveform distortions are mainly affected by supply voltage,divider capacitor inductance and coil turns in the primary side. Therefore,a simulation model and field tests were conducted to check the output waveform distortions of CVT caused by switching overvoltage. The obtained results show that the insufficient saturation ratio of in?termediate transformer core is the main factor causing the waveform distortion;the circuit breaker operation can lead to the ferromagnetic resonance of CVT,which results in the output of waveform distortions. The research result is of theo?retical and engineering values to the operation reliability of 110 kV CVT in a smart substation.关键词
110kV电容式电压互感器/波形畸变/仿真分析/现场实验/故障分析Key words
110 kV capacitor voltage transformer/waveform distortion/simulation analysis/field test/fault analysis分类
信息技术与安全科学引用本文复制引用
王谦,陆宇航,刘勇,赵雪骞,周恺,叶宽..110 kV电容式电压互感器波形异常及影响因素分析[J].电力系统及其自动化学报,2017,29(11):138-142,5.基金项目
国家电网公司科技资助项目(52020116000A) （52020116000A）
