摘要
随着分布式发电系统的利用日益增多,电力系统结构发生了改变,如何获得高性能、安全的电能成为一个挑战性的问题。对于带有逆变器的并网系统,分析逆变器输出电流是一项关键技术。提出利用小波变换来分析并网电流波形,实现了使用小波消除噪声信号及检测扰动信号,该方法可以提高分布式发电系统的性能。仿真结果证明了该技术的有效性。
As the composition of power systems change, with the increased use of distributed generators （DGs）, the ability to maintain a secure supply with high power quality becomes more challenging. It has been shown that analyzing the output current of the inverte is the key technique for inverter DGs. Wavelet transform was used to analyze the grid connect current signals, which realizes the wavelet denoising and the detection of the non - stationary disturbances. The proposed method has the potential to enhance the performance of DGs. Simulation results demonstrate the effectiveness of this technique.
出处
《机床与液压》
北大核心
2008年第B07期232-234,共3页
Machine Tool & Hydraulics
关键词
电能质量
分布式发电系统
并网
小波变换
Power quality
Distributed generator （DG）
Grid connect
Wavelet transform
