王文国,张奔.基于滑动平均滤波器半正切锁相环的电网频率估计方法[J].电测与仪表,2025,62(9):210-217. wangwenguo,Zhang Ben.A grid frequency estimation method based on moving average filter half-tangent phase-locked loop[J].Electrical Measurement & Instrumentation,2025,62(9):210-217.
基于滑动平均滤波器半正切锁相环的电网频率估计方法
A grid frequency estimation method based on moving average filter half-tangent phase-locked loop
文中提出了一种用于估计电网频率的带滑动平均滤波器（Moving Average Filter,MAF）半正切锁相环（half-tangent phase-locked loop, HTan-PLL）。所提出的PLL(phase-locked loop)采用半正切鉴相器（phase detector, PD），并在锁相环中引入MAF(mass air flow)解决电网中的谐波干扰。与常规SRF-PLL(self resonant frequency phase-locked loop)和HTan-PLL(half-tangent phase-locked loop)相比，当电网频率发生跳变时，所提出的带滑动平均滤波器半切锁相环（moving average filter half-tangent phase-locked loop,MAF-HTan-PLL）具有更高的动态特性；此外，当电网包含谐波干扰时，它具有理想的稳态精度和动态性能。通过实验与常规方法进行对比分析，验证了该方法的优越性。结果表明，相比于常规方法，所提方法在频率发生较大跳变以及存在谐波干扰的情况下，仍然能够快速而准确的实现频率估计。
英文摘要:
This paper proposes a half-tangent phase-locked loop (HTan-PLL) with a moving average filter (MAF) for estimating grid frequency. The proposed PLL utilizes a half-tangent phase detector (PD) and introduces MAF into the phase-locked loop to address harmonic interference in the power grid. Compared with the typical SRF-PLL and HTan-PLL, the proposed moving average filter half-tangent phase-locked loop (MAF-HTan-PLL) exhibits height dynamic characteristics when there are frequency jumps in the grid. Furthermore, it demonstrates ideal steady-state accuracy and dynamic performance in the presence of harmonic interference. Experimental comparisons with conventional methods validate the superiority of this approach. The results indicate that the proposed method can achieve rapid and accurate frequency estimation even in scenarios with significant frequency jumps and harmonic interference, outperforming conventional methods.
