摘要
静止同步补偿器(STATCOM)要求补偿电流能够无误差地跟踪给定的无功电流信号,否则会影响STATCOM的补偿效果。传统单一控制方法在控制精度和响应速度上不能兼顾,这里提出了一种新型复合控制策略,将不同控制方法的优缺点进行互补组合,可得到更优的控制策略。其中重复控制能产生与无功电流相同的输出,但其动态性能不佳,在此对重复控制器加以改进,增强了控制器的稳态精度和响应速度,同时,为克服重复控制延时一个周波响应的动态性能缺陷,提出一种误差迭代比例积分控制法,将其嵌入到重复控制中形成新的复合控制策略。经过仿真与实验证明了采用改进复合控制策略可以同时取得较好的补偿效果与动态响应速度,适用于STATCOM中补偿电流的控制。
Static synchronous compensator（STATCOM） requires compensation current to track the given reactive current signal without error,otherwise it will affect the STATCOM compensation effect.The traditional single control method can not take into account both the control accuracy and the response speed.By applying the improved compound control strategy, the advantages and disadvantages of different control methods are complemented and the better control strategy can be obtained.Repeated control earl produce the same output as reactive current, but its dynamic performance is poor.The repetitive controller is improved and enhanced the steady precision and the response speed of the controller, at the same time, in order to overcome the repetitive control delay a frequency response of the dy- namic performance of defects, a kind of iterative error proportional integral control method which is embedded into the composite control strategy for the formation of new repetitive control is put forward.The simulation results show that the composite control strategy can achieve better compensation accuracy and dynamic response speed, and is more suitable for the control of the compensation current in STATCOM.
作者
蔡霞
邓健
舒展
杨立行
CAI Xia;DENG Jian;SHU Zhan;YANG Li-xing(State Grid Electric Power Company of Jiangxi Province Electric Power Research Institute,Nanchang 330096,China)
出处
《电力电子技术》
CSCD
北大核心
2018年第10期59-63,共5页
Power Electronics
关键词
静止同步补偿器
复合控制
动态性能
static synchronous compensator
compound control
dynamic performance
