中国电机工程学报Issue(19)：3089-3097,9.DOI:10.13334/j.0258-8013.pcsee.2014.19.007
微网系统并网/孤岛运行模式无缝切换控制策略
A Control Strategy of Seamless Transfer Between Grid-connected and Islanding Operation for Microgrid
摘要
Abstract
For microgrid (MG) system with master-slave control strategy, seamless transfer between grid-connected and islanding operation remains a technical barrier, which needs to be solved urgently. In this paper, the structure and operation principle of the MG was firstly investigated. According to the dynamic behavior exhibited in the mode transfer process, an improved proportional-integral (PI) controller for voltage-loop was proposed. By using energy conservation theorem, the output value of the new PI controller can be calculated and preset for next operational mode before mode transfer. Thus, the vibration and overshot problem of local AC bus could be well reduced, even eliminated. Also, a novel phase-locked loop (PLL) for MG application was presented. The phase angle of AC bus can be maintained smoothly and successively during different kinds of mode transfer condition, which makes the seamless transfer between grid-tied and islanding operation possible. Then, optimized parameters of the controller were derived for main converter with mathematical model and engineering experience. Both simulation and experimental platform were established, simulation and experimental results verify the effectiveness and superiority of the proposed strategies.关键词
微网/主从控制/并网运行/孤岛运行/无缝切换Key words
microgrid (MG)/master-slave control/grid-tied operation/islanding operation/seamless transfer分类
信息技术与安全科学引用本文复制引用
陈杰,陈新,冯志阳,龚春英,严仰光..微网系统并网/孤岛运行模式无缝切换控制策略[J].中国电机工程学报,2014,(19):3089-3097,9.基金项目
国家863高技术基金项目(SS2014AA052002)；国家自然科学基金项目(51307084)；江苏省自然科学基金项目(BK20130792)。The National High Technology Research and Development of China 863 Program (SS2014AA052002) （SS2014AA052002）
Project Supported by National Natural Science Foundation of China (51307084) （51307084）
Natural Science Foundation of Jiangsu Province(BK 20130792) （BK 20130792）
