基于数字补偿技术改善高压功率源失真度指标的研究

Ｒesearch on Improving Distortion Index of High － voltage Power Source Based on Digital Compensation Technology

摘要:

介绍了采用数字补偿技术，改善高压电能计量装置功率源输出信号波形失真度指标的一种有效解决方案。 该方案基于表源一体高压电能计量装置实施，利用现代数字合成及高速数字采样技术，以逐点补偿方式修正功率源 输出波形，使高压电能计量装置输出的波形信号失真度指标大幅改善，从而抵消因为升压器、升流器以及高压电能表 等非线性负载导致功率源输出回路正弦信号的失真，减少因功率提供的信号失真度大而导致高压电能表检定过程中 引入的不确定度误差值。通过采用数字补偿技术使得高压电能计量装置在额定功率输出状态下信号波形失真度优 于 0． 3% 。

关键词:高压电能表; 检定系统; 失真度; 高压电能计量装置; 数字补偿

Abstract:

The use of digital compensation technology is introduced to improve the waveform distortion of power source of high － voltage electric energy metering device，which provides a solution to improve the distortion index． The scheme is carried out based on high － voltage electric energy metering device with the integration of the meter and its power source． Using modern digital synthesis and high － speed digital sampling technology，the power source output waveform is corrected by the point by point compensation method，so that the distortion index of waveform signal output of high － voltage electric energy metering device is greatly improved． The nonlinear load such as booster，large current generator and high － voltage electric energy meter leads to the distortion of sinusoidal signal in the output circuit of power source，which reduces the uncertainty error of high － voltage electric energy meter by reducing the distortion of the signal provided by the power． By using the digital compensation technology，the distortion of high － voltage electric energy metering device in the rated power output state is better than 0． 3% ．

Key words:high-voltage electric energy meter; calibration system; distortion; high-voltage electric energy metering device; digital compensation