双时间尺度电-气耦合网络动态潮流计算

Electric-gas coupled network dynamic energy flow calculation based on double-time scale

为了解决综合能源系统导在时间尺度上存在显著差异,以及网络潮流计算计算时间长和难度大的问题.通过kiuchi隐式方法,建立电-气网络的动态模型,求解天然气管道的动态潮流方程;并基于奇异摄动理论建立了燃气轮机的摄动模型,提出了一种多时间尺度特性的动态潮流算法.最后,对IEEE-9节点电力系统和3节点的天然气网络的耦合多能系统中进行仿真验证.结果表明:通过使用多时间尺度计算方法可以有效减少计算时间,并且燃气轮机入口流量变化会影响天然气网络潮流分布.

In order to solve the significant difference between the integrated energy system and the time and scale of the network power flow calculation,this paper establishes the dynamic model of the electric-gas network.The Kiuchi implicit method is used to solve the dynamic trend of the natural gas pipeline.Equation,and based on the singular perturbation theory,the perturbation model of gas turbine is established.Then the paper proposes a dynamic power flow algorithm with multi-time scale characteristics.Finally,the IEEE-9 node power system and the 3-node natural gas network coupled multi-energy system are simulated and verified.The results show that the calculation time can be effectively reduced by using a multi-time scale calculation method.In addition,changes in gas turbine inlet flow will affect natural gas network flow distribution.