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对基于瞬时无功功率理论的ip-iq检测方法进行改进,提出了一种微电网用有源电力滤波器谐波电流检测新方法。通过合理地选择每一级混合形态滤波器结构元素的形状和长度,将多个混合形态滤波器进行串行级联,由此构建链式混合形态滤波器,取代ip-iq检测算法中的低通滤波器以减小检测延时,并用同步参考计算模块替换锁相环以减小检测误差。仿真和实验结果表明,与传统谐波电流检测方法相比,该方法可更快速而准确地检测出谐波信号。
The method of ip-iq detection based on instantaneous reactive power theory is improved. A new harmonic current detection method of active power filter for microgrid is proposed. By reasonably selecting the shape and length of the structural elements of each hybrid morphological filter, a plurality of hybrid morphological filters are cascaded in series to construct a hybrid hybrid morphology filter, which replaces the low in the ip-iq detection algorithm Pass filter to reduce the detection delay, and replace the PLL with the synchronous reference calculation module to reduce the detection error. Simulation and experimental results show that this method can detect harmonic signals more quickly and accurately than traditional harmonic current detection methods.