摘要
以光伏并网发电系统为对象,提出了分布式并网发电系统在孤岛下继续供电运行的控制策略,将含有分布式并网发电系统的电网进行孤岛分层,通过控制不同层次的孤岛控制单元和并网发电逆变器以实现孤岛运行,同时分析了孤岛控制单元的主要功能和并网逆变器在孤岛运行中输出功率自调整以及电网恢复正常后再并网的方法。仿真和实验结果表明,该控制方法可使分布式并网发电系统在并网和孤岛下灵活运行,从而提高了分布式并网发电系统的使用率。
Currently the usage of grid-connected dispersed generation systems is decreased in the islanding situation since dispersed generation systems （DGS） stop power supply when islanding occurs. This paper proposes hierarchical islanding control strategies by hierarchical islanding control units and PV grid-connected inverter for continuous running of grid-connected DGS in islanding situation, analyzes main functions of hierarchical islanding control units and controlling methods of grid- connected inverter when automatically adjusting output power and grid-reconnecting. Finally, simulation and experiment results show that the controlling strategies make the DGS easily work in both grid-connection models and islanding running models, and enhance the usage of the DGS.
出处
《电力系统自动化》
EI
CSCD
北大核心
2008年第9期88-91,共4页
Automation of Electric Power Systems
基金
高等学校博士学科点专项科研基金(20060280018)
台达电力电子科教发展基金(DREO2006017)
上海市教委重点项目基金(06ZZ03)
上海市科委登山计划项目(06DZ12211)~~
关键词
并网发电
孤岛运行
孤岛分层
功率调整
再并网
grid-connected generation
islanding running
hierarchical islanding
power adjustment
grid-reconnection
