基于电阻分压式组合互感器的三相三元件高供高计计量方法

Measurement Method of Three-phase Three Element High Voltage Supply and High Voltage Meter Based on Resistance Voltage Divider Combined Transformer

为了提高电表计量方法的准确性,避免用户电费的损失,提出基于电阻分压式组合互感器的三相三元件高供高计计量方法。设计电阻分压式组合互感器前端采样电路采集电压与电流的信号,在高供高计计量方法条件下,利用组合互感器的等效电路计算电压数据,通过对称分量法获取电流数据,基于FFT变换公式转换采集的电压与电流信号,并测算出有功功率与无功功率数据。选取电阻分压费控成套柱上断路器配电设备进行仿真试验,采用所提方法对电能进行计量,其校验互差数平均值为0.046%,远小于国家标准参数,证明了所提方法的计量精度较高,具有一定的实际应用性能。

In order to improve the accuracy of electricity meter measurement method and avoid the loss of users'electricity charges,a three-phase three element high supply high meter measurement method based on resistance voltage divider combined transformer is designed.The front-end sampling circuit of the resistance voltage divider combined transformer is designed to collect the voltage and current signals.Under the condition of high power supply and high meter measurement,the equivalent circuit of the combined transformer is used to calculate the voltage data.The current data is obtained through the symmetrical component method.The collected voltage and current signals are converted based on the FFT transformation formula,and the active power and reactive power data are calculated.A complete set of on column circuit breaker power distribution equipment controlled by resistance voltage divider is selected for simulation experiment.The method proposed in this paper is used to measure electric energy.The average value of the calibration cross difference is 0.046%,which is far less than the national standard parameters.It is proved that the measurement accuracy of the method proposed in this paper is high and has a certain practical application performance.