摘要
根据电压型PWM整流器静止坐标系下的数学模型,提出了电压平方外环和电容功率与网侧无功功率内环的直接电容功率控制策略。针对目前预测直接功率控制的不足,分析了电压矢量对功率的作用机理,采用了划分动态扇区的方法。为提高动态性能,推导并设计了一种预测直接电容功率控制(P-DCPC)方法,并通过仿真和实验对其进行验证。通过对电容电压与负载功率的解耦,实现了电容功率的直接控制,提高了动态性能。仿真和实验结果验证了该方法的有效性和优越性。
A new control strategy with outer voltage square loop and inner capacitor active power and grid reactive power loop is proposed based on the mathematical model of the static coordinate system of voltage source PWM rectifier. To improve both the steady and dynamic performance, 18 non-fixed sectors are divided and a scheme of predict direct capacitor power control is designed and realized by simulation. This method achieves the goal that the capacitor active power can be controlled directly by decoupling of the power of capacitor and load. Results of simulation and experiment both prove the validity of this method.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2013年第3期96-101,共6页
Power System Protection and Control
基金
国家自然科学基金(60874077)
国家质检总局公益性行业科研专项资助项目(200910097
201010057)~~
关键词
PWM整流器
预测
直接电容功率控制
电压平方外环
动态扇区
PWM rectifier
predict
direct capacitor power control （DCPC）
outer voltage square loop
non-fixed sectors
