电测与仪表2017，Vol.54Issue(24)：78-86,9.
直流微网的一种分布式控制研究
A distributed control approach of DC micro-grid
摘要
Abstract
The disadvantage of the conventional droop control scheme of DC micro-grid is that it should compromise between the reasonable load share and voltage regulation.In order to achieve the same load ratio among the microsources of different capacities,an improved droop control approach is proposed based on the low-bandwidth communication (LBC),in which the load share accuracy and reasonable voltage deviation are achieved by load share compensation and voltage deviation compensation respectively.The multi-source DC network with the improved droop control approach is modeled to analyze its small-signal stability.The mechanism of stopping sending power signal from the over-loaded sources because of the miss setting of droop coefficients is introduced to ensure the micro-system operation.A 3-source 6-bus DC micro grid is built in MATLAB/Simulink to check the overall behavior of the proposed approach.The hot swap and the scenario of some micro sources over-loaded with others at lower load rate due to improper setting of droop coefficients is simulated.The simulations verify that the stability,the power share accuracy and the voltage deviation quality can be achieved by the proposed approach.关键词
直流微网/下垂控制/功率分配机制/分布式控制/功率补偿/电压补偿Key words
DC micro-grid/droop control/power share mechanism/distributed control/load share compensation/voltage deviation compensation分类
信息技术与安全科学引用本文复制引用
侯亚文,曹炜,祁晓卿,刘宁宁..直流微网的一种分布式控制研究[J].电测与仪表,2017,54(24):78-86,9.基金项目
国家高技术研究发展计划(863计划)(2011AA05A106) （863计划）
