自升压标准电压互感器的误差测量方法

Error Measurement Method for Self-boosting Standard Voltage Transformer

随着自升压标准电压互感器的广泛使用,部分自升压标准电压互感器也暴露了设备自身存在的问题。在对自升压标准电压互感器进行误差测量或用其作为测量标准对被试互感器进行误差校验时,容易出现误差超差的现象。分析了这种现象,并通过试验证明产生的原因是升压器一次电流产生的磁场影响到了标准电压互感器的自身误差。为提高自升压标准电压互感器误差校验工作的准确性,结合当前自升压标准压互感器的设计原理和误差校验方法,提出了一种适合于自升压标准电压互感器误差测量的合理方法。

With the wide application of self - boosting standard voltage transformer, a part of self - boosting standard voltage transformers has exposed their own problems. In the error measurement of self - boosting standard voltage transformer or the error calibration of the tested instrument as a measurement standard, the excessive error may occur easily. This phenomenon is analyzed, and it is proved by the tests that the cause is the magnetic field generated by primary current of booster which affects the error of standard voltage transformer. In order to improve the accuracy of error calibration for self - boosting standard volt- age transformer, a new method for error measurement is proposed based on the current design principle and error measurement method of self - boosting standard voltage transformer.