摘要
针对现有大功率储能系统在可靠性、集中式工作中存在的不足,研究了基于主从式三电平变流器并联技术的大功率储能系统。分析了现有的变流器并联技术,结合大功率储能系统多装置并联高可靠性、大容量扩容等特点,确定了基于主从式三电平变流器并联技术的大功率储能系统方案,分析了在dq0坐标系下的变流器并联均流控制算法和三电平变流器的中点电位平衡问题,结合Matlab/Simulink仿真模型对所构建的变流器并联系统进行仿真,并结合实验系统进行了2台变流器的并联实验,仿真及实验结果表明储能系统在空载与带载情况下均能正常工作,满足高可靠性要求。
The three-level converter parallel technology was researched which is applied in the energy storage system, that is able to improve its reliability and security. The existing converter parallel technologies and the energy storage system＇s characters such as high reliability and system redundancy, etc. were analyzed. A solution based on master-slave control paralleled three- level converter was proposed for the energy storage system. Then, in dqO coordinates the current sharing control algorithm and the inherent problem of capacitor neutral-point voltage fluctuation in three-level converters were analyzed. A Matlab/Simulink emulation model was used for testing the converter parallel system as well as an experimental system with two converters paralleled. Simulation and experimental results verify that the energy storage system still operate normally after load changed which reveals that the converter parallel system can fully qualify the high reliability
出处
《电气传动》
北大核心
2014年第3期27-31,共5页
Electric Drive
基金
国家863高技术基金项目(2011AA05A108)
上海市电力公司重点科技项目(11dz1211500)
大型风电场储能接入应用技术研究与集成示范项目
关键词
储能系统
三电平变流器
变流器并联
主从式控制
Energy storage system
three-level converter
paralleled converter
master-slave control
