基于高频隔离的级联型H桥补偿器的仿真  

Simulation of Compensator With Cascade H-Bridge Inverter Based on High Frequency Isolated Converters

作　　者：黄尧[1] 贾鹏宇[1] 刘建强[1] 郑琼林[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044

出　　处：《电工技术学报》2011年第5期108-112,共5页Transactions of China Electrotechnical Society

摘　　要：提出了一种新型的基于高频隔离的级联H桥式补偿装置。与传统应用于三相三线制系统星形联结的级联变换器不同的是,此拓扑引入一个带有高频变压器的三端口双向直流变换器,可以补偿系统中的负序电流,使得能量可以在各相间流动。此电路可用于三相三线或四线制系统,能降低系统直流侧二次脉动。通过适当的控制方法,可以补偿负序、无功以及谐波电流。文章通过对不同负载的仿真分析,证明了电路拓扑的可行性。A new compensator with cascade H-bridge inverter is proposed in this paper.Comparing with traditional compensator based on wye-connected cascade inverters used in three-phase three-wire high voltage system,the new topology conquers the difficulty of compensating negative-sequence current and makes the energy exchange between phase and phase by bringing in a three-port bi-directional converter with a three windings high frequency transformer.And it can also be applied in three-phase four-wire system.DC-link voltage pulsation can be weaken in this topology.It can compensate negative-sequence current,reactive and harmonic current by proper controlling strategy.Simulation results of different loads verify the feasibility of the topology.

关 键 词：负序电流补偿 双向DC-DC变换器 三相四线制系统 级联补偿 移相控制 

分 类 号：TM461.5[电气工程—电器] TM761.1