摘要: Capacitor voltage transformers (CVTs) are widely used in high-voltage and ultra-high voltage power systems, and harmonic measurement cannot avoid its influence. The calibration of CVTs primarily consists of two steps: accurate fre... 展开 Capacitor voltage transformers (CVTs) are widely used in high-voltage and ultra-high voltage power systems, and harmonic measurement cannot avoid its influence. The calibration of CVTs primarily consists of two steps: accurate frequency response measurement and precise parameter identification. In this paper, an intelligent high-voltage CVT harmonic frequency response test platform based on the sweeping frequency principle is established. The test results of several CVTs show that the frequency characteristics of CVTs manufactured with the same design parameters by the same manufacturer are very close. On this basis, to solve the minimum frequency regulation limitation of the test, the optimal identification model of key parameters is proposed by using the least square method to minimize the difference between the model simulation and the test results. The results show that the optimization model can identify the key parameters more accurately, which can be used as the basis future correction of CVTs. It further expands the ability of CVTs in harmonic measurement. 收起