热电联产调度下电-气耦合系统关键负荷供应分析

Analysis of Critical Load Supply of Electricity-gas Coupling System Under Combined Heat and Power Generation Dispatch

因具有经济环保、多能转换等特点,今后热电联产(combined heat and power,CHP)系统将进入规模化应用阶段,优化CHP系统规模与选址有助于解决电网故障时关键负荷保电难题,提升电网运行弹性。为此,在构建考虑动态能效的CHP系统和电-气耦合能源系统网络模型基础上,提出了以经济性最优为目标的电-气综合能源系统关键负荷供应优化方法。以IEEE 14节点系统为例提出CHP系统最佳配置方案,验证内外部故障下所提CHP系统配置方案的有效性和可行性。最后,对CHP系统电效率、能源价格等因素对成本的影响进行敏感度分析。

Due to the characteristics of economic and environmental protection and multi-energy conversion,the combined heat and power(CHP) systems will enter a stage of large-scale application in the future.Optimizing the scale and location of the CHP system can help to solve the problem of power preservation for critical loads during grid failures and improve grid operational resilience.To this end,based on the construction of the CHP system and a network model of the electricity-gas coupled energy system considering dynamic energy efficiency,this paper proposes an optimization method of critical load supply for the electricity-gas integrated energy system with optimal economy.The optimal CHP configuration scheme is proposed with the IEEE 14 bus system as an example and the effectiveness as well as the feasibility of the proposed configuration scheme of the CHP system is verified under internal and external failures.Finally,the paper makes sensitivity analysis on the impact of CHP electrical efficiency,energy price and other factors on the energy cost.