摘要
利用移相全桥变换器设计直流微电网中的储能单元,并采用蓄电池作为储能设备。首先介绍了直流微电网的结构和基于母线电压信息的系统运行模式切换方法。在分析移相全桥变换器单侧移相和双侧移相工作原理的基础上,分别设计了储能单元恒压下垂模式和恒流模式的控制策略。结合直流微电网运行模式和储能单元控制策略,进一步提出了基于母线电压信息和微电网中心控制器指令相结合的储能单元运行模式切换方案。搭建了相关实验平台,所设计的储能单元可按照母线电压信息和电流指令在恒压与恒流模式之间进行切换,实验结果验证了所提储能单元控制策略与运行模式切换方案的有效性。
The phase-shifting full-bridge converter is applied in the design of ESU(Energy Storage Unit) for DC microgrid and the batteries are adopted as its energy storage devices. The architecture of DC microgrid and the system operating mode switching based on the DC-bus voltage signal are introduced. The single- and dualside phase-shifting principles of phase-shifting full-bridge converter are analyzed and the ESU control strategies in constant-voltage droop mode and constant-current mode are designed respectively. By combining the DC microgrid operating mode with the ESU control strategy,an ESU operating mode switching scheme based on the DC-bus voltage signal together with the command of DC microgrid central controller is proposed. An experiment platform is established and the experimental results of an ESU prototype demonstrate the switching between constant-voltage and constant-current operating modes based on the DC-bus signal and current command,verifying the effectiveness of the proposed ESU control strategy and switching scheme.
出处
《电力自动化设备》
EI
CSCD
北大核心
2016年第3期67-72,共6页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51477033
51207032)
哈尔滨市科技创新人才研究专项资金资助项目(2014RFQXJ136)~~
关键词
直流微电网
移相全桥变换器
蓄电池
储能
移相控制
运行模式切换
DC microgrids
phase-shifting full-bridge converter
electric batteries
energy storage
phase-shifting control
operating mode switching