Hour-Ahead Optimization and Real-Time Control Method for Micro-Grid Interconnection
Liu Nian1,Li Yansong1,2,Zhang Jianhua1,Lei Jinyong3
1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China 2.Sichuang Electric Power Design & Consulting Company Limited Chengdu 610041 China 3.Electric Power Research Institute China Southern Power Grid Guangzhou 510080 China
Abstract It is conducive for operation optimization and resource complementation in space and time to interconnect the neighboring autonomous micro-grids.An operation method combining hour-ahead optimization with real-time control is put forward in this paper,aimed at reducing generation cost and improving operation stability.From the aspect of hour-ahead optimization,a dispatching method of global optimization is proposed,which takes resource complementarity in space and time into consioderation.It is based on ultra-short term forecasting results and aims at a minimum generation cost.From the aspect of real-time coordination control,in view of the power fluctuation problem caused by randomness of wind resource,solar resource and load,a method of constant power control for the tie-line based on dynamic droop control strategy is proposed.It makes the power fluctuations distributed reasonably and economically.Finally in this paper,an example is executed in order to verify that the dispatching method of short-term optimization can promote resource complementation and reduce operation cost.The result of the real-time simulation confirms the validity of the dynamic droop control strategy for constant power control of the tie-line.
Liu Nian,Li Yansong,Zhang Jianhua等. Hour-Ahead Optimization and Real-Time Control Method for Micro-Grid Interconnection[J]. Transactions of China Electrotechnical Society, 2016, 31(21): 1-11.
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2016, Vol. 31 
