摘要
针对动态电压恢复器对电压跌落检测实时性的要求,提出了一种基于动态预测算法的参考波生成方法。利用已知的电压采样值预测下一采样时刻的电压采样值,通过检测实际值和预测值的偏差判断电压扰动的起止时刻。在电压扰动期间使用递推算法计算每一时刻的参考电压。仿真分析验证了该方法的正确性,实验结果表明该算法可在数个采样周期内检测到电压扰动,适合DVR实时检测的需要。与采用数学变换结合低通滤波检测算法以及迭代算法相比,该算法具有实现容易、运算速度快等优点。
In order to meet the real time requirements for dynamic voltage restorer （DVR）, a new method to generate reference wave is presented, which bases on a kind of dynamic forecast algorithm. The known sample values are used to estimate the value of the next sample time, and the actual start or stop of the voltage sag are confirmed by detecting how much the actual values deviated the predict values. During the voltage sag, the reference values are replaced by those which are calculated from the actual values according to the forecast algorithm. The validity of the method is verified by the results of emulators, and the results of experiment indicate that the preferred algorithm is able to detect the voltage sags within several sample duration, that can meet the real time requirements for dynamic voltage restorer. Compared with the detection algorithms which employed certain kinds of mathematic transform and lowoasses, the oreferred algorithm is much more simnle and faster
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第1期125-131,共7页
Transactions of China Electrotechnical Society
关键词
动态电压恢复器
电能质量控制
电压暂降
电压暂升
锁相环
Dynamic voltage restorer, control of power quality, voltage sag, voltage swell,phase-locked loop （PLL）
