考虑天然气-电力耦合的多能源系统风电消纳分析

Wind abandonment analysis of multi-energy systems considering gas-electricity coupling

燃气-蒸汽联合循环机组将电热冷气等多种能源系统耦合成多能源系统,电转气(P2G)技术应用于消纳弃风,进一步加强了电力与天然气2个系统间的耦合。文中探讨了P2G的消纳弃风原理,研究了P2G设备的启停控制策略,并建立了基于P2G的气电耦合模型和天然气管网储气模型,构建了考虑天然气-电力耦合运行的多能源系统协同优化调度模型。最后通过算例仿真,分析了计及天然气-电力耦合的多能源系统的消纳弃风效果,以及天然气管网储气能力与P2G配置容量的关系。研究表明,充分利用天然气管网的储气能力可进一步消纳弃风,且管网储气能力越强,系统配置的P2G容量可越小。

Gas-steam combined cycle units couple various energy systems into multi-energy systems,such as electricity,heat and air-conditioning.The application of electricity-to-gas(P2G)technology helps to eliminate wind abandonment and further strengthens the coupling between power system and natural gas system.In this paper,the principle of abandoning wind in P2G and the start-stop control strategy of P2G equipment are discussed,and the gas storage and gas-electricity coupling system model of natural gas pipeline is established,and the multi-energy system cooperative optimal dispatching model considering natural gas-electricity coupling operation is constructed.Finally,through numerical simulation,the wind abandonment effect of multi-energy system considering natural gas-electricity coupling and the relationship between gas storage capacity of natural gas pipeline network and P2G allocation capacity are analyzed.The research shows that the abandoned wind can be further eliminated by making full use of the gas storage capacity of natural gas pipeline network,and the larger the gas storage capacity of pipeline network,the smaller the P2G capacity of system configuration.