电工技术学报2018，Vol.33Issue(4)：721-729,9.DOI:10.19595/j.cnki.1000-6753.tces.161394
双极性直流微电网中多电压平衡器协调控制
Coordinated Control of Multiple Voltage Balancers in a Bipolar DC Microgrid
摘要
Abstract
For neutral-point voltage balancing control in a bipolar DC microgrid, a coordinated control strategy for parallel operation of multiple voltage balancers was proposed, which was composed of droop method and disturbance observer based current feed-forward. With the observer and only the local measurements, the output current of the voltage balancer could be quickly tracked without any additional current sensors. Through the estimated value, DC voltage droop control and current feed-forward had been well designed. It can realize unbalanced current sharing and plug-play feature without communication, and improve the dynamics and stability of neutral-point voltage balancing control respectively. A prototype bipolar DC microgrid, including a DC simulated voltage source, two voltage balancers, resistive DC loads and a DC-DC converter based constant power load, has verified the performance of the presented control.关键词
双极性直流微电网/多电压平衡器/即插即用/协调控制/干扰观测器Key words
Bipolar DC microgrid/multiple voltage balancers/plug and play/coordinated control/disturbance observer分类
信息技术与安全科学引用本文复制引用
李霞林,张雪松,郭力,王成山,张绍辉,杨苹..双极性直流微电网中多电压平衡器协调控制[J].电工技术学报,2018,33(4):721-729,9.基金项目
国家高技术研究发展计划(863计划)(2015AA050104),国家自然科学基金项目(51507109),天津市科技支撑计划重点项目(14ZCZDGX00035)和广东省绿色能源技术重点实验室项目(2008A060301002)资助. （863计划）
