Energy Cooperation Between Microgrids With Renewable Energy Sources

Energy is critical to country's development.With consistently using traditional energy,traditional energy will be drained in this century.The world eagers to solve the gap between energy supply and demand.In this situation,the next generation energy network is designed for solving energy shortage by implementing renewable energy and cooperation among different energy networks.Renewable energy cannot be transferred in long distance,it should be used locally.In order to efficiently use renewable energy and decrease energy loss,Energy Internet consists of tons of microgrid which can supply and consume energy.The stochastic renewable energy supply and demands bring challenge in energy supply and demand balance for microgrid.System should utilize complementary renewable energy.Since microgrids are selfish,they will not sacrifice its own benefit to help other microgrids.If energy cooperation wants to stimulate microgrids to cooperation,then energy cooperation needs sufficient economic incentive method.So energy management and cooperation is critical to new energy system.Focus on these problem,our research mainly focuses on energy management and trading,and achieve several outcomes:At first,we want to consider a complex model which have electricity and heat management.If the energy schedule algorithm simultaneously managing both energy can fully utilize both energy,the energy efficiency can be improved.The stochastic energy output and demands bring new challenge to microgrid.The traditional method analyze renewable energy probability distribution to manage local energy.However precise renewable energy production probability distribution is hard to get.So we design Lyapunov optimization based local energy management algorithm.Lyapunov optimization based algorithm can achieve theoretical result without probability distribution.Then microgrid can both produce and consume energy.microgrid is a prosumer in energy cooperation.The traditional trading method can not fully utilize this characteristic.We develop a new algorithm based on the double auction model,and this algorithm dynamic allocate microgrid trading job according to energy price.At last,to balance several energy cooperation is a difficult problem.At last we use the real world data to prove our mechanism's efficiencyThe stochastic renewable energy makes energy supply and demand in energy cooperation be complex.The complex energy supply and demand situation let server energy price fluctuation.High power reservation can effectively protect microgrid from potential energy shortage.The fluctuation energy supply and energy price of energy cooperation make microgrid with low energy reservation unwill to attend energy cooperation.Energy cooperation should guarantee that microgrid future cooperation supply-demand situation not be changed.However the traditonal energy trading have this problem.Then we design a new energy cooperation method called Inter-Microgrid Energy Offer.Inter-Microgrid Energy Offer can protect microgrid from energy supply and price fluctuation.Credit and economic reward can stimulate microgrid to participate in energy cooperation,and default penalty can guarantee predicable energy repay.Several mechanisms can improve the energy cooperation wiliness by diminish the influence of cooperation fluctuation of energy cooperation and fully use the complementary benefit from distributed system.