求翻译：近年来, 已有文献介绍应用小波变换方法进行电能质量评估、电磁暂态波形分析和电力系统扰动建模等电能质量问题的研究。是什么意思？

In recent years, introduction of methods based on wavelet transform for power quality assessment, the electromagnetic transient waveform analysis and power system disturbance modeling of power quality problems.

In recent years, there is literature on application wavelet transform methods for Power Quality assessment, and electromagnetic transient waveform analysis and electrical disturbances such as modeling power quality problems.

正在翻译，请等待...

In recent years, the document describes the application of wavelet transform method for electromagnetic transient waveforms of power quality assessment, analysis and modeling of power system disturbance of power quality problems, such as research.

In recent years, had the literature to introduce carries on the electrical energy quality appraisal, the electromagnetism transition condition profile analysis and using the wavelet transformation method electrical energy quality question and so on electrical power system perturbation modelling rese