小波变换在暂态电能质量检测和识别中的应用

摘要

间歇性能源的接入电网，使电力系统的运行特性和电能质量受到影响，特别是暂态电能质量。重点研究了暂态电能质量扰动的小波检测方法，详细介绍了暂态电能扰动小波检测的基本原理和实现方法，并进行了仿真研究，理论分析和仿真结果表明该方法能够实现对电压暂态电能质量扰动快速、准确的检测，并能够根据能量函数识别出扰动类型。研究思路可为检测识别含间歇性能源接入系统的电能质量提供一种有效、可行的方法。%With the intermittent energy connected to the grid , the operating characteristics of power system and the power qual-ity are affected, especially the transient power quality .The focuses of the research are on the wavelet detection method of tran-sient power quality disturbances , its basic principle and realization method are also introduced in detail , and the simulation is carried out.The theoretical analysis and the simulation results show that the proposed method can achieve a fast and accurate detection for transient power quality disturbances of voltage , and be able to identify the disturbance type according to the ener-gy function.The research ideas can provide an effective and feasible method to detect and identify the power quality with the integration of intermittent energy.