摘要
三线四线制STATCOM对滤除三相四线制配电网中的电流谐波,补偿不平衡系统中的无功电流有着重要的意义。由于A/D采样以及复杂的补偿电流检测算法使得STATCOM系统产生一定的延时,难以满足实时性的要求。外插值法预测计算简单,可以有效减小系统延迟,但仍存在一定的误差。提出了改进的外插值方法可以极大的减小预测误差,对STATCOM补偿电流进行预测,提高了系统的实时性和补偿精度,仿真结果充分验证了算法的有效性。
Three-phase four-wire STATCOM has important significance in filter out the current harmonics in three-phase four wire power distribution network and the compensation of reactive current in the system. Because of the A / D sampling and the complex compensation current detection algorithm,the STATCOM system has a certain delay,it is difficult to meet the requirements of realtime. The external interpolation method can effectively reduce the delay of the system,but it still has some errors. The improved interpolation method can greatly reduce the prediction error,and it can be used to predict the STATCOM compensation current,improve the real-time performance and compensation accuracy of system. The simulation results verify the effectiveness of the algorithm.
出处
《电气自动化》
2016年第5期57-59,108,共4页
Electrical Automation
关键词
三相四线制
不平衡
STATCOM
外插值法
预测
three-phase four-wire system
imbalance
STATCOM
external interpolation method
prediction
