摘要
针对H桥级联型逆变器直流侧电压不均衡、不稳定的现象,深入研究了一种两级式的均压和稳压控制策略。上级稳压控制维持各相直流侧总电压的稳定,控制装置与电网间的能量交换;下级均压控制维持相内各单元直流侧稳定,按需求分配从电网吸收的功率。从能量的角度分析了直流侧电容电压的波动规律和均压、稳压的控制原理。最后通过Simulink进行仿真,验证了基于H桥级联型逆变器APF的均压、稳压控制策略的可行性。
In this paper,a new control strategy is proposed for cascaded H-bridge multilevel Active Power Filter （ APF）to stabilize and balance DC voltages. This control system consists of a two-stage controller. The first one is used to stabilize the total DC voltage of each phase,while the second one is provided to balance the DC voltage of each unit. This control strategy is based on the energy exchange between APF and the grid. The simulation shows the feasibility of the proposed control strategy.
出处
《电测与仪表》
北大核心
2014年第20期70-75,共6页
Electrical Measurement & Instrumentation
基金
广东省引进创新科研团队计划资助项目(2011N015)
国家863高技术基金资助项目(2011AA05A107)
关键词
H桥级联逆变器
有源电力滤波器
均压
稳压
cascaded H-bridge inverter
APF
voltage-balance
voltage-stabilization
