Research On Microgrid’s Energy Management System And Related Subsidy Policy

Since the new century,the centralized power generation and supply mode of the traditional power grid structure has been unable to meet the growing and diversified power demand of people.In addition,most of the energy of traditional power grids comes from coal,but the gas emitted by burning coal will cause great harm to the environment.In order to solve the problem of power supply and environmental pollution,the concept of microgrid containing distributed power,load,energy storage and energy management system was proposed by scholars at the beginning of this century.However,the development of the microgrid systems has been affected by the serious power supply and demand imbalance problems("demand and abandon").First of all,within the microgrid,the dissertation focuses on the power supply and demand imbalance problems with or without the storage device based on the energy management system and the loads regulation strategy.Then,beyond the microgrid,the dissertation concentrates on how to alleviate the problem of“demand and abandon" with two different kind of existing subsidy policies.To this end,the dissertation proposes a Starkberg game model to simulate the interaction between power generation and electricity users in the microgrid,so as to obtain the optimal energy management strategy.Based on the proposed model and the actual data of the China Power Grid Demonstration Project:Zhumadian Wenquan Power Station,the dissertation analyzes the impact of the energy storage device and two different kind of existing subsidy policies on the optimal energy management strategy.The results show that:(1)a certain capacity of energy storage devices can help solve the problem of "demand and abandon".(2)the power subsidy policy is ineffective for "demand and abandon".(3)a certain amount of infrastructure subsidy can solve the problem of "demand and abandon".