一种改进的任意次谐波电流检测方法

An Improved Method for Detecting Random Integer Order Harmonic Current

以d-q变换原理为理论基础,在现有的比较成熟的任意次谐波电流(电压)检测方法上,提出了一种改进的考虑时滞补偿的任意次谐波电流(电压)检测方法。该方法通过在检测环节中加入预测补偿角,补偿了因检测环节(传感器、滤波器、采样电路及A/D转换等环节)所导致的时滞效应,同时,考虑了频率偏移对此方法检测效果的影响。通过仿真实验和理论分析验证了新算法的优点。

Based on d-q coordinate transformation and the existing and prevalent real-time detection method of random integer-order harmonic current （voltage） , an improved real-time detection meth- od is proposed, in which the effect of the time-delay is considered. By way of adding predicated compensation angle into detecting link, the time-delay brought by detecting link （sensor, filter, sample circuit and A/D convert ） is compensated. And also the effect on the frequency deviation to this detection method is considered. Simulation results validate the correctness and effectiveness of the proposed method.