考虑天然气网络状态的电力–天然气区域综合能源系统稳态分析

Steady State Analysis of Electricity-Gas Regional Integrated Energy System With Consideration of NGS Network Status

在区域综合能源系统中,电力系统与天然气系统两部分耦合密切,该文重点讨论以电力和天然气系统为主的区域综合能源系统的运行规律,为简单起见,称其为"电力–天然气区域综合能源系统"。为研究电力与天然气系统间的交互影响,首先借鉴电力系统较为成熟的稳态分析思路,对综合能源系统中的天然气环节进行建模与求解,关注以能源集线器为核心的电/气之间耦合环节;进一步,构建电力–天然气区域综合能源系统稳态分析综合求解模型。在此基础上,探究天然气系统网络状态改变(如天然气气质改变、负荷调节与引入注气点)对其自身以及区域综合能源系统的影响。经算例验证,所提的综合求解模型可有效反映天然气系统网络状态变化对其他耦合系统的影响。

In regional integrated energy system （RIES）, the interactions between power system and natural gas system （NGS） becomes intimate. This paper focuses on the operation rules of power system and NGS based R/ES, which is also called electricity-gas RIES for simplicity. In order to analyze the interactive influence between power system and NGS, this paper draws on the mature steady-state solving algorithms in power system to deal with related problems in NGS, coupling parts between power system and NGS are concerned with the core concept of energy hub; furthermore, a comprehensive analytical model of electricity-gas RIES is proposed. On this basis, changes of NGS network status （including the changes of gas quality, load regulation and the introduction of gas injection） are explored, its influence on NGS and RIES is discussed. Verification by numerical examples, the comprehensive solution model proposed in this paper can effectively show the influence of changes of NGS network status on other coupled system.