Performance evaluation of a non-isolated bidirectional three-port power converter for energy storage applications

2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) Pub Date : 2016-07-14 DOI:10.1109/IPEMC.2016.7512725

Meng Zhang, Y. Xing, Hongfei Wu, Yangjun Lu, K. Sun

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引用次数: 5

Abstract

A pulse width modulation (PWM) plus phase-shift controlled (PPS) non-isolated bidirectional three-port converter (TPC) is analyzed for energy storage power system to interface multiple energy sources, storage devices and regulated voltage bus. A staked dual half-bridge converter (DHB) is integrated into a non-isolated bidirectional buck/boost converter to achieve the bidirectional power transmission between any two of the three ports. With the shared switching bridge in the low voltage side, the number of active switches is reduced. Thanks to the integration structure, low voltage stress on the active switches and high voltage conversion ratio will be achieved. PPS control strategy is employed to provide two control freedoms and single-stage power conversion between any two of the three ports is achieved. What's more, with PPS control scheme, wide range voltage/power regulation and soft-switching of all the low-voltage and high-voltage side active switches can be realized. Operational principles, control strategy and characteristics of the analyzed converter are presented. Experiments of a 1-kW prototype have been carried out to verify the feasibility and effectiveness of the converter.

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用于储能应用的非隔离双向三端口功率变换器的性能评估

分析了一种脉宽调制(PWM)加相移控制(PPS)的非隔离双向三端口变换器(TPC)，用于储能电力系统中连接多个电源、存储设备和稳压母线。在非隔离的双向降压/升压变换器中集成了一个桩置双半桥变换器(DHB)，以实现三个端口中任意两个端口之间的双向功率传输。在低压侧采用共享开关桥，减少了有源开关的数量。由于采用集成化的结构，可以实现对有源开关的低电压应力和高电压转换比。采用PPS控制策略提供两个控制自由度，实现了任意两个端口之间的单级功率转换。采用PPS控制方案，可以实现大范围的电压/功率调节和所有低压和高压侧有源开关的软开关。介绍了所分析变流器的工作原理、控制策略及特点。在1千瓦样机上进行了实验，验证了该变换器的可行性和有效性。

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2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia)

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