摘要
随着电力市场改革不断深入,研究配电侧多微网间的能量交易问题对提升区域经济性具有重要意义。为减少微网运行经济成本、促进可再生能源消纳以及降低微网大规模接入对配电网运行造成的不利影响,以相邻范围内多微网间能量交易作为研究对象,构建了基于合作博弈的区域多微网分层协调能量优化管理模型。该模型上层为管理中心统一定价,下层为各微网自治优化。下层考虑不同类型负荷的需求响应,并通过协议签订形式形成与用户间的协调运行;采用二阶锥松弛技术将含潮流约束的非凸非线性规划问题转化为可有效求解的二阶锥优化问题,并采用对偶理论、Big-M法等分解理论将原双层规划模型转化为易求解的单层规划模型。上层管理中心制定电价并与微网进行多次决策交互以获得区域多微网经济运行的均衡状态,随后基于Shapley值对区域多微网进行收益分配。最后通过算例验证了该模型对于提升微网收益、促进可再生能源消纳的有效性。
With the continuous deepening of the reform of the power market,it is of great significance to study the energy transaction among multiple microgrids on the distribution side to improve regional economy.To reduce the economic cost of micro grid operation,promote the consumption of renewable energy,and reduce the adverse impact of large-scale microgrid access on distribution network operation,taking the energy trading among multiple microgrids in the adjacent range as the research object,this paper establishes a hierarchical coordinated energy optimization management model for multi-microgrid system applying cooperative game.The upper layer of the model is the unified pricing of the management center,and the lower layer is the autonomous optimization of each micro grid.In the autonomous optimization scheduling of each microgrid,the demand response of different types of loads is considered,and a coordinated operation with users is formed through the signing of an agreement.The non-co nv ex non-linear programming problem with power flow constraints is transformed into a secondorder cone optimization problem that can be effectively solved by using the second-order cone relaxation technology,and the original bi-level programming model is transformed into an easy-to-solve single-level linear programming model by using decomposition theory such as dual theory and Big M method.The upper management center formulates the electricity price and conducts multiple volume and price interactions with the micro grids to find the equilibrium state of the coordinated operation of the regional multi-microgrid system.And then the income of the regional multi-microgrid alliance is distributed through the income distribution method based on the Shapley value.Finally,an example is given to verify the effectiveness of the model for improving the benefits of microgrids and promoting the consumption of renewable energy.
作者
王瀚琳
刘洋
许立雄
陈贤邦
谭思维
WANG Hanlin;LIU Yang;XU Lixiong;CHEN Xianbang;TAN Siwei(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)
出处
《电力建设》
北大核心
2020年第8期87-98,共12页
Electric Power Construction
关键词
区域多微网
风电消纳
分层协调优化
需求响应
合作博弈
鲁棒优化
regional multi-microgrid system
wind power consumption
hierarchical coordinated optimization
demand response
cooperative game
robust optimization
