冷热电联供系统多元储能及孤岛运行优化调度方法  

Multi-Energy Storage System and Islanded Optimal Dispatch Method of CCHP

作　　者：陈柏翰[1] 冯伟[1] 孙凯[1] 张承慧[2] 孙波[2] Chen Pohan;Feng Wei;Sun Kai;Zhang Chenghui;Sun Bo(State Key Laboratory of Safety Control and Simulation of Power System and Power Generation Equipment,Tsinghua University,Beijing,100084,China;School of Control Science and Engineering,Shandong University,Jinan,250061,China)

机构地区：[1]电力系统及发电设备安全控制和仿真国家重点实验室(清华大学),北京100084 [2]山东大学控制工程与科学学院,济南250061

出　　处：《电工技术学报》2019年第15期3231-3243,共13页Transactions of China Electrotechnical Society

摘　　要：建立以电能、风能、太阳能、天然气和储能为能量互补形式的冷热电联供系统。针对并网运行时的营运成本最小化问题及孤岛运行时能源利用率最大化问题,提出多能互补系统综合优化调度策略。根据不同时间尺度的冷热电联供系统平衡方程相结合的方法提出多元储能技术,更新原有的调度计划,降低系统运行成本,同时通过计算负荷温度变化率得出系统负荷中的冷热惯性及冷热电联供系统自身能量储备,与储能设备共同实现负荷预测、风光功率预测波动抑制以及对阶梯电价的适应,构成多元储能系统。提出适用于孤岛运行时冷热电联供系统目标函数以及孤岛运行时的优化调度策略,实现孤岛运行下能源利用率最大化。最后利用CPLEX数学规划方法对所提控制策略进行了仿真验证。This paper established a combined cooling,heat and power energy supply system with electricity,wind power,solar power,natural gas and storage energy resource.Aiming at the goal of minimum the operation cost in the grid-connected operating mode and the maximum energy efficiency in the islanded operating mode,the paper proposed an optimal dispatch strategy for multi-energy complement system.Combining multiple varied time scale balance function,and the multi-energy storage technic proposed in this paper,the dispatch schedule can be reformed,which enhanced the flexibility of the system dealing with incident during operating and reduce operating cost.By calculating temperature gradient,the inertia of the cooling load and the heat load can be known,which supports the energy storage of the system and enhances the ability in restricting forecast fluctuation together with the storage equipment.This paper also proposed an objective function for islanded mode for CCHP,and established the optimal dispatch strategy for islanded mode,which realizes the upmost energy utilization rate.In the end,a simulation of the proposed strategy is done by CPLEX to verify the theory of the paper.

关 键 词：冷热电联供系统 多能互补 多元储能 孤岛运行 优化调度 微电网 

分 类 号：TM619[电气工程—电力系统及自动化]