一种新型微电网谐波与正负序检测方法

A Novel Detection Method for Harmonics and Positive-Negative Sequence Decomposition for Microgrid

电流谐波与电压不平衡是影响微电网电能质量的两个重要因素。针对目前谐波检测与电压正负序分离方法存在的问题,提出一种基于动态相量的谐波与正负序分量检测方法;该方法既可以用于电流谐波检测,也可用于电压畸变或不平衡条件下的正负序分量分离。采用动态相量法下的Park变换矩阵,简化控制;并且省去了传统检测方法的滤波器与陷波器装置。最后对该方法进行了对比分析,并在有源滤波器仿真中进行了验证分析,仿真结果显示了所提方法的正确性、可行性。

Current harmonic and unbalanced voltage are two important factors that affect the power quality for microgrid.A novel dynamic phasors based method for both harmonics detection and positive-negative sequence decomposition is proposed.This method involved in a new Park transformation using the dynamic phasors,it can simplify the control structure,and can simplify the design work for a simple control and avoid LPF and BSF.Simulations on the proposed method and its application in APF are presented and show a satisfactory result.