CVT谐波测量修正方法研究  

Research on Harmonic Measurement and Correction Method of CVT

作　　者：郭成 朱明星[2] 段锐敏 王柘 焦亚东 GUO Cheng;ZHU Mingxing;DUAN Ruimin;WANG Zhe;JIAO Yadong(Power Science Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650001,China;School of Electrical Engineering and Automation,Anhui University,Hefei 230601,China;Research Institute of Green Industry Innovation,Anhui University,Hefei 230088,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明650001 [2]安徽大学电气工程与自动化学院,合肥230601 [3]安徽大学绿色产业创新研究院,合肥230088

出　　处：《电力电容器与无功补偿》2022年第2期57-63,共7页Power Capacitor & Reactive Power Compensation

摘　　要：针对110 kV及以上电网广泛应用的电容式电压互感器(capacitor voltage transformer,CVT)谐波测量失真问题,首先根据CVT的谐波传递模型分析,明确了CVT关键分布参数对其谐波传递特性影响规律,然后利用密勒定理简化模型,从串并联谐振角度深入分析了造成CVT谐波传递特性非线性的根本原因;最后针对试验条件的约束,提出基于粒子群算法的三核心分布参数辨识方法,并给出了CVT谐波测量修正的建议。In view of harmonic measurement distortion of capacitor voltage transformer(CVT),which is used widely in power grids at 110 kV and above,the influence of key distribution parameters on its harmonic transfer characteristic is defined in accordance with the harmonic transfer models analysis of CVT.Then,the root cause of non⁃linear of harmonic transfer characteristic of CVT is analyzed deeply from the perspective of serial and parallel resonance by way of using the model which is simplified by Miller’s theorem.Finally,in view of the constraints of the testconditions,the three⁃core distributed parameter identification me thod based on particleswarm algorithm is proposedandsuggestions for CVT harmonic measurement correction are given.

关 键 词：电容式电压互感器(CVT) 密勒定理 串并联谐振 粒子群算法 修正方法 

分 类 号：TM451.2[电气工程—电器]