计及静态安全因素与热电最优潮流的综合能源系统联合运行优化模型

Operation Optimization Model for Multi-Integrated Energy Systems Considering Static Security and Optimal Energy Flow

针对区域多能量枢纽(energy hub,EH)互联的热电耦合综合能源系统(integrated energy system,IES),提出一种综合考虑静态安全因素与热电最优潮流的IES联合优化运行模型。模型为双层结构,首先提出热电耦合网络最优潮流计算方法,并在此基础上建立整个系统的静态安全评估指标。上层模型以系统运行经济性与静态安全性为目标,优化各EH单元的冷热电输出;下层模型根据上层热电最优潮流计算结果,结合经济性目标,并兼顾光伏消纳能力,实现EH单元内部各机组的实时出力优化。最后结合算例仿真结果证明了所提模型的有效性。

An operation optimization model considering static security and optimal energy flow is proposed for district power-heating integrated energy systems(IES)with multiple energy hubs(EH).Firstly,a calculation method for optimal energy flow is proposed.Then a static security assessment index is established based on energy flow.Overall IES operating cost and static security are both taken into account in the upper-level of the model to optimize power-heating output of each EH.After obtaining multi-objective optimal power-heating flow distribution of IES,the lower-level of the model takes both economic index and photovoltaic accommodation capacity as target to optimize the output of each unit in EHs.Finally,a case study is given to verify effectiveness of the proposed model.