含冷热电联供及储能的区域综合能源系统运行优化

Operation Optimization of Regional Integrated Energy System with CCHP and Energy Storage System

利用区域综合能源系统提高负荷侧运行灵活性是提升电力系统内高比例可再生能源消纳能力的重要技术手段,并且区域综合能源系统内的储能设备可以通过解耦热电联系来有效降低运行成本。用场景分析法对可再生电源出力随机性进行建模,以揭示可再生能源的随机波动性对含有冷热电联供的区域综合能源系统的运行优化所带来的影响。在考虑系统内设备特性后,建立了包含能源转换设备、能源储存设备在内的区域综合能源系统模型,并采用Yalmip工具箱和商业软件Cplex在MATLAB中进行了仿真分析,求得了系统内各个单元最佳出力、机组组合和不同调度模式下总运行成本。仿真算例表明,含有冷热电联供的区域综合能源系统可以通过储能设备有效解耦其热电运行约束,充分发挥区域综合能源系统依附能源互联网运行所带来的经济优势,提高能源利用效率。

Utilizing regional integrated energy system（RIES）to improve load side flexibility is an important technical means to increase the penetration level of renewable energy in the power system.The thermal and electrical energy storage system（ESS）in the RIES can be decoupled between the thermal and electric power to effectively reduce operation cost.The scenario-based analysis method is used to model the randomness of renewable energy output and review the impact of the renewable energy volatility on the operational optimization of RIES with combined cooling,heating and power（CCHP）.Based on the characteristics of the equipment in RIES,a model for RIES including energy conversion equipment and ESS is established.Moreover,a simulation program in MATLAB using YALMIP toolbox and a software called CPLEX has been developed to obtain the optimal output of each unit in the system and the total operation cost in different dispatching modes.The result of the simulation program shows that a RIES with CCHP and ESS can effectively decouple its thermoelectric operation constraints with the help of energy storage equipment,bringing into full play the economic advantage received from the RIES operation backed by the Energy Internet.