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【6h】 Fast and Robust Phase Estimation Algorithm for Heavily Distorted Grid Conditions

机译严重失真电网条件的快速鲁棒相位估计算法

【摘要】This paper proposes a fast and robust phase estimation algorithm (PEA), a counterpart of the phase-locked loop (PLL), for heavily distorted grid conditions. The PEA, named as the WLSE-PEA, consists of the moving average filter (MAF), the weighted least squares estimation (WLSE), the frequency-locked loop (FLL), and the zero crossing detection (ZCD). The MAF can eliminate all the odd-order harmonics in the distorted grid voltages. The WLSE is employed to estimate the fundamental positive-sequence component. The combination of the ZCD and the FLL enables the WLSE-PEA to be adaptive to frequency deviations. Compared with some advanced phase-locked loops, the proposed WLSE-PEA has a faster response. Also, it is robust to common grid disturbances including three-phase unbalances, dc offsets, harmonics, phase jumps, and voltage sags. Simulation and experimental results have verified the effectiveness and advantages of the WLSE-PEA.

【摘要机译】针对严重失真的电网条件,本文提出了一种快速且鲁棒的相位估计算法(PEA),它是锁相环(PLL)的一种。 PEA被称为WLSE-PEA,由移动平均滤波器(MAF),加权最小二乘估计(WLSE),锁频环(FLL)和过零检测(ZCD)组成。 MAF可以消除扭曲的电网电压中的所有奇数阶谐波。 WLSE用于估计基本正序分量。 ZCD和FLL的组合使WLSE-PEA能够适应频率偏差。与某些先进的锁相环相比,所提出的WLSE-PEA具有更快的响应速度。而且,它对于常见的电网干扰(包括三相不平衡,直流偏移,谐波,相位跳变和电压骤降)具有鲁棒性。仿真和实验结果证明了WLSE-PEA的有效性和优势。

【原文格式】PDF

机译 锁相环;电力谐波滤波器;谐波分析;锁相环;估计;稳健性;滤波;
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