一种新的电-气互联多区域综合能源系统最优能流计算方法

A New Calculation Method for Optimal Energy Flow of Multi-regional Electricity-Gas Integrated Energy System

构建高效、低碳、可靠的综合能源系统是推动能源消费革命、促进能源可持续发展的有效手段,因此,综合能源系统最优能流问题一直以来受到学术界和工业界的广泛关注。文章提出了一种新的电-气互联多区域综合能源系统最优能流计算方法。首先,以经济性最优为目标,建立电-气互联综合能源系统最优能流模型。其次,针对交流潮流约束与气压气流约束等因素所引入的模型非凸项,利用二阶锥松弛将原模型进一步转换为综合能源系统最优能流凸优化模型。再次,计及多综合能源系统区域间能量信息交互,提出一种基于自适应步长交替方向乘子法的集中-分布式多区域综合能源系统最优能流计算方法。最后,通过仿真算例验证了所提最优能流计算方法的有效性和准确性。

Building an efficient,low-carbon and reliable integrated energy system is an effective means to promote the revolution of energy consumption and the sustainable development of energy.The optimal energy flow of integrated energy system has been widely concerned by academia and industry.In this paper,a new calculation method for optimal energy flow of multi-area electricity-gas integrated energy system is proposed.Firstly,the optimal energy flow model of integrated energy system is established with the objective of total economic optimization of integrated energy system.Secondly,the original model is further transformed into the optimal energy flow convex optimization model of integrated energy system by using second order cone relaxation(SOCR)in view of the non-convex terms of the model introduced by AC power flow constraints and air pressure and flow constraints.Thirdly,considering the inter-regional energy information interaction of multiple integrated energy systems,an adaptive step-size alternating direction multiplier method(ADMM)is proposed to calculate the optimal energy flow of centralized-distributed multi-regional integrated energy system.Finally,a simulation example is given to verify the effectiveness and accuracy of the proposed method.