一种用于动态电压恢复器的电压跌落检测算法  

A detection algorithm of voltage sag used in dynamic voltage restorer

作　　者：田明[1] 王昌南[1] 贺诚[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《工矿自动化》2013年第6期70-73,共4页Journal Of Mine Automation

基　　金：科技部中小企业创新基金重点项目(11C26213204616)

摘　　要：针对传统的电压跌落d-q检测算法和Hilbert检测算法在补偿快速性和抗干扰性方面存在矛盾的问题,提出了一种将d-q检测算法与Hilbert检测算法相结合的电压跌落检测新算法:对电网侧电压信号采样后,经d-q检测单元得到谐波补偿波形;然后滤除3次谐波,滤波后的信号再经Hilbert检测单元得到电压幅值补偿波形;叠加该2种补偿波形可确定最终的补偿波形。仿真结果表明,该检测算法对于含3次谐波的电压跌落补偿效果较好,兼具补偿快速性和抗干扰能力。In view of contradiction between compensation rapidity and anti-interference performance existed in traditional detection algorithm of voltage sag of d-q detection algortihom and Hilbert detection algorithm, a new detection algorithm of voltage sag combined d-q detection algorithm with Hilbert detection algorithm was proposed, namely, voltage signal of grid side was sampled, and the signal passed through d-q detection unit to get harmonic compensation waveform at first, then the signal passed through Hilbert detection unit to get voltage amplitude compensation waveform after the third harmonic was filtered from the signal. The two kinds of compensation waveforms were made superposing to get the final compensation waveform at last. The simulation results show that the detection algorithm has better compensation effect on voltage sag with the third harmonic and abilities of compensation rapidity and anti- interference.

关 键 词：动态电压恢复器 电压跌落 谐波补偿 电压补偿 D-Q变换 HILBERT变换 

分 类 号：TD608[矿业工程—矿山机电]