摘要
研究了一种在线检测三相正、负序分量的方法,即延时信号消除法(DSC)。在实际电网发生频率偏移时,对DSC产生的误差进行了理论分析,提出了减小电网频率偏移对DSC误差影响的方法。并对一台100 kW的并网样机进行实验,验证了该方案的有效性。
Abstract： An online detection method called as DSC （Delayed Signal Cancellation） to detect the positive and negative sequence distraction in three-phase system was studied. The detection error by DSC under grid frequency variation was analyzed theoretically, and then, presenting the method to decrease the detection error influenced by the grid frequency variation. Experiment on a 100kW prototype linked with the grid was performed, verifying the effective- ness of this program.
出处
《电机技术》
2017年第5期26-29,共4页
Electrical Machinery Technology
关键词
正负序提取
频率偏移
数字控制
误差
分析
positive and negative sequence distractionfrequency variation digital control error analysis
