摘要
为了使APF具有较高的谐波检测精度和较快系统的系统响应,提出了将ip-iq谐波检测与滑窗迭代DFT谐波检测相结合的一种混合谐波检测新方法。阐述了ip-iq谐波检测法原理,指出了该方法由于LPF的存在使得系统的响应速度较慢的缺陷,同时分析了滑窗迭代DFT原理,指出了其计算繁琐、计算量较大的缺点。新谐波检测算法采用滑窗迭代DFT代替LPF,解决了LPF设计难、系统响应慢的难题,又由于只需计算直流分量,计算量得以变小。最后,仿真和实验结果表明该方法使系统具有较高的检测精度的同时还具有较快的系统响应,并验证了该检测方法的有效性。
In order to make APF have higher harmonic detection accuracy and faster system response,a new hybrid harmonic detection method is proposed in the paper,in which ip-iq harmonic detection combines with sliding window iterative DFT detection. The principle of ip-iq harmonic detection method is described,and the shortcomings of the method are pointed out. The method is slow in the system response due to the low pass filter（ LPF）. At the same time,the DFT principle of the sliding window is analyzed,the disadvantages of the calculation are pointed out. The new harmonic detection algorithm adopts sliding window iterative DFT to replace the LPF,so that the problem of the difficult LPF design and the slow system response is solved. Finally,the simulation and experiment results show that the proposed method has higher detection accuracy and a faster system response,and verifies the validity of the proposed method.
出处
《电子测量与仪器学报》
CSCD
北大核心
2016年第2期297-303,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(51177037)项目资助
关键词
谐波检测
低通滤波器
滑窗迭代
系统响应
harmonic detection
low pass filter
sliding window iteration
system response
