摘要
为了保证微电网电路运行的安全,基于小波变换研究谐波电流动态补偿方法。根据小波变换找出不稳定信号,使用Mallat算法检测谐波电流大小,通过流压转换确定跟踪控制环节中的参考电流值,利用空间矢量脉宽调制控制方法,实现对谐波电流的动态补偿。测试结果表明,使用小波变换法分解相似电流信号时,在第5层就可以得到谐波基频波形,补偿后的谐波电流与参考电流值只相差1.5 A,具有较好的动态补偿效果。
In order to ensure the safety of the micro grid circuit, based on wavelet transform, the harmonic current dynamic compensation method is studied. Find out the unstable signal according to the wavelet transform, use the Mallat algorithm to detect the harmonic current, determine the reference current value in the tracking control link through the current voltage conversion, and use the space vector pulse width modulation control method to realize the dynamic compensation of the harmonic current. The test results show that using wavelet transform to decompose similar current signals, the harmonic fundamental frequency waveform can be obtained at the fifth layer, and the difference between the compensated harmonic current and the reference current is only 1.5A, which has a good dynamic compensation effect.
作者
罗伟峰
赖丹晖
LUO Weifeng;LAI Danhui(Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen Guangdong 518000,China)
出处
《信息与电脑》
2022年第19期23-25,共3页
Information & Computer
关键词
小波变换
微电网
谐波电流
动态补偿
wavelet transform
microgrid
harmonic current
dynamic compensation
