多能互补综合能源系统混合能流计算方法及算例

Multi-energy flow calculation method for multi-energy complementary integrated energy systems

以可再生能源为主的综合能源系统利用多能源之间的耦合机制实现多能互补,促进可再生能源消纳,提升系统的能源利用效率,助力实现碳达峰、碳中和目标。建立了电-气-热耦合综合能源系统的混合能流计算模型,采用牛顿-拉夫逊迭代算法进行混合能流计算。为验证混合能流算法的有效性,构建了724节点电-气-热耦合综合能源系统混合能流仿真算例,其中275节点电力网络接入了14处分布式电源,228节点热力网络包含了99节点供蒸汽热力网络及129节点供生活热水网络。仿真结果表明,该算法既可以实现时间断面的混合能流仿真,同时具备连续时间混合能流仿真能力,可用于综合能源系统运行状态以及多能源网络供能品质等场景的评估。

A renewable energy-oriented integrated energy system can realize multi-energy complementarity through different coupling mechanism.The system incentives the consumption of renewable energy,improve the energy utilization efficiency and contributes to the realization of carbon peaking and carbon neutrality.The model of electricity-heat-gas coupling system is established,and the calculation method for the multi-energy flow of the system is proposed.The multi-energy flow is calculated by Newton-Raphson iterative algorithm.To verify the effectiveness of the multi-energy flow calculation method,simulation calculation was made on the multi-energy flow of a 724-node electricity-heat-gas coupling system,in which the 275-node power grid was connected to 14 distributed power sources and the 228-node thermal network included a 99-node steam network and a 129-node hot water network.The results show that the calculation method can simulate the multi-energy flow of a single time section and of a continuous time period.Thus,multi-energy flow calculation method can be used to evaluate the operation state of an integrated energy systems and the energy supply quality of a multi-energy network.