基于一致性算法的级联H桥直流变换器研究

2020-08-03 08:05:46黄从胜程志江陈星志
现代电子技术 2020年6期

黄从胜 程志江 陈星志

摘  要: 针对多个H桥的接入和接出,造成各路变流器不均流均压问题,提出群系统一致性策略对群H桥模块进行协同控制。考虑H桥通信拓扑和信息交互权值以及H桥模块接入和接出系统等情况,分析了系统稳定特性,然后将所有H桥一致性信息与电压电流双闭环控制策略相结合,实现了群H桥电流状态快速一致和电压的稳定。通过Matlab/Simulink仿真结果表明,所提出的控制方案能有效地实现群H桥变流器的电流一致和电压稳定,提高系统的鲁棒性,对大规模的混合储能接入微电网有一定的理论意义。

关键词: H桥直流变换器; 一致性算法; 混合储能; 双闭环控制; 协同控制; 仿真分析

中图分类号: TN624?34; TM76                    文献标识码: A                      文章编号: 1004?373X(2020)06?0005?04

Research on cascaded H bridge DC/DC converter based on consistency algorithm

HUANG Congsheng, CHENG Zhijiang, CHEN Xingzhi

(College of Electrical Engineering, Xinjiang University, Urumqi 830047, China)

Abstract: In allusion to the problem of various converters′ uneven current and voltage sharing caused by the I/O connection of multiple H bridges, a cluster system consistency strategy is proposed for the cooperative control of cluster H bridge modules. In consideration of the H bridge communication topology, information exchange weights, the I/O connection of the H bridge module and so on, the stability characteristics of the system are analyzed, and then all the H bridge consistency information is combined with the voltage and current double closed?loop control strategy, so as to realize the fast consistency of current state and the voltage stability of cluster H bridges. The simulation results obtained by Matlab/Simulink show that the proposed control scheme can effectively achieve the current consistency and the voltage stability of the cluster H bridge converters, and improve the robustness of the system. It has a certain theoretical significance for the large?scale hybrid energy storage access to microgrid.

Keywords: H bridge DC/DC converter; consistency algorithm; hybrid energy storage; double closed?loop control; cooperative control; simulation analysis

0  引  言

随着能源危机与环境问题受重视程度日益增加,微电网作为风电、光伏利用的一种重要形式,已成为研究热点。微电网的运行效果与逆变器的控制直接相关,在研究储能系统等微电网中的问题时,必须有适合的逆变器控制策略。为有效解决新能源发电存在的间歇性、不确定性、波动性问题,微电网系统中必须配置一定的储能装置[1]。储能系统应用在微电网中具有独特的双向调节作用,主要是它可以作为发电单元和负荷单元,提升了可再生能源接入大电网的并网比例。储能并网装置的选取也影响储能系统接入大电网的比例,储能装置通过级联H桥可以形成高压输出满足电网的容量和电压等级的需求,同时储能单元基于级联H桥可以采用分布式的方式,易于储能系统的扩容。……

登录APP查看全文