摘要
统一电能质量调节器(UPQC)的直流侧电容电压维持恒定与其和电源的有功功率平衡有关,为获得直流电压闭环控制模型,将直流电压表示成为电源有功电流的函数是必要的。提出了一种利用UPQC小信号模型推导出直流侧电压和电源电流的线性表达式的方法,据此获得了直流侧电压控制的闭环模型。以此为基础,探讨了直流侧电压控制器的设计方法。利用这种方法,针对实际的控制策略,计算出控制器的参数。仿真结果显示,采用这种方法设计的直流侧电压控制系统具有较好的频率特性,获得了较好的直流侧电压,表明这种方法是有效的。
For UPQC, maintaining its constant DC voltage is related to the active power balance between it and sources. So, to get a mathematical model of the closed loop controller of DC voltage, expressing it as a function of the active current of sources is critical. This paper proposes a method of designing the DC voltage controller by using the small signal model of UPQC, with which mathematical relationship between DC voltage and the active current of sources is deduced, based on which the mathematical model of closed loop of DC voltage is promoted. Parameters of the controller are calculated with it. The simulation results show that the DC control system has good frequency characteristic and DC side voltage, which verifies the effectivity. This work is supported by National Natural Science Foundation of China（No.50807049）.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第22期190-195,共6页
Power System Protection and Control
基金
国家自然科学基金项目(50807049)
中国地质大学优秀青年教师资助计划项目(CUGQNL0842)~~
