CAJ | 학술논문

电容式电压互感器（CVT）测量的准确度影响着电能计量的准确性和继电保护动作的可靠性。为了研究在谐波条件下 CVT 测量的准确性，为提高 CVT 的测量精度提供参考依据，文章基于 CVT 的等效电路模型，推导出了谐波条件下 CVT 变比的表达式，研究了谐波条件下 CVT 的励磁阻抗和电容分压比对测量精度的影响规律，并通过仿真分析对其进行了验证。
전용식전압호감기（CVT）측량적준학도영향착전능계량적준학성화계전보호동작적가고성。위료연구재해파조건하 CVT 측량적준학성，위제고 CVT 적측량정도제공삼고의거，문장기우 CVT 적등효전로모형，추도출료해파조건하 CVT 변비적표체식，연구료해파조건하 CVT 적려자조항화전용분압비대측량정도적영향규률，병통과방진분석대기진행료험증。
The measurement accuracy of capacitor voltage transformer(CVT)affect the accuracy of electric energy measuring and reliability of relay protection action. In order to study the accuracy of CVT measurements under the harmonic conditions,and to improve the measurement accuracy of the CVT to provide reference,this paper has ob-tained some conclusions based on the equivalent circuit model of CVT. The expression of CVT measurement ratio un-der the harmonic conditions is derived,and the effect of excitation impedance and capacitance divider ratio of the measurement accuracy under harmonic conditions has been researched and been verified by simulation analysis.