电容式电压互感器误差的现场校验方法

对电容式电压互感器的校验方法进行了分析，为解决用常规法现场校验电压等级高的试品所需设备庞大、不易实施的难题，提出了采用等效法进行现场校验的建议，并就等效法的建模和准确度分析等进行了试验研究。通过等效法和常规法的现场实际校验对比，证实等效法完全能满足２２０ｋＶ及以下电压等级准确度０．５级以下的电容式电压互感器的校验要求，且可降低校验所需标准电压互感器额定电压，外围设备可降低容量、减小体积和减轻重量，大大方便现场校验的实施。

Field Calibration For Detection Error of CVT

To solve the problem of bulkiness of calibrating device for high voltage CVT,the adoption of field equivalent calibrating method is recommended through analysing the calibrating principle of CVT,and a study on model establishment and accuracy analysis for the equivalent method was made.The comparison tests between routine and equivalent calibrating method in the field showed that the equivalent method can well satisfy the calibration requirment for CVT of 220 kV and below with a accuracy level of 0.5 and less.In addition,the equivalent method can also reduce the rated voltage of the standard PT required by the calibration,the capacity and weight of the peripheral equipments,thus greatly conveniences the field calibration.