摘要
随着微电网工程的推广应用,多个地域邻近的单微电网因某种需求而互联形成多微网系统。由于多微网系统拓扑结构复杂,具有多种运行模式,如何实现多微网系统在多种运行模式下灵活无缝切换成为亟待解决的问题。针对单/三多微网系统,提出相应的并离网切换策略,包括主动并网转离网、被动并网转离网和离网转并网策略。其中并网转离网切换策略针对单相微电网接入引起的离网多微网系统三相功率不平衡问题,提出单/三相多微网联络线功率调节算法;离网转并网策略考虑系统容量提出并网顺序方案。最后基于广东省绿色能源技术重点实验室(CET LAB)多微网平台对所提策略进行实验验证,证实了所提策略的有效性和实用性。
With spread and application of microgrid projects, multi-microgrids system is formed in plurality of adjacent microgrids with certain needs. Due to topological complexity and diversity of power supply modes, multi-microgrids system has many kinds of operation modes. It is an urgent problem to solve to realize flexible seamless switching of multi-microgrid system in different operation modes. In this paper, mode transfer strategies applied to PV-ESS multi-microgrids with three-phase/single-phase architecture were presented. The strategies included active and passive switching to islanded mode and switching to grid-connected mode. Considering the problem of three-phase power unbalance in multi-microgrid system when switching to islanded mode due to single-phase microgrids＇ connection, power regulation process of single- and three-phase microgrids was proposed. In case of switching strategy to grid-connected mode, grid connection sequence was proposed considering system capacity. Accomplished on Clean Energy Technology Laboratory（CETLAB） multi-microgrid platform, experimental results verified effectiveness and feasibility of the mode transfer strategies proposed.
出处
《电网技术》
EI
CSCD
北大核心
2016年第11期3459-3466,共8页
Power System Technology
基金
国家高技术研究发展计划(863项目)(2014AA052001)
广东省科技计划项目(2012B040303005)~~
关键词
多微网
单相/三相
并离网切换
实验验证
multi-microgrids
three-phase/single phase
mode transfer strategies
experimental verification
