基于分立求解的电气耦合综合能源系统多能流联合计算方法  

Multi-energy Flow Calculation Method for Integrated Electricity-gas System Based on Discrete Solution

作　　者：徐晶 徐科[2] 王世举[2] 李娟 张雪菲 XU Jing;XU Ke;WANG Shiju;LI Juan;ZHANG Xuefei(Economic and Technological Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300171,China;State Grid Tianjin Electric Power Company,Tianjin 300010,China)

机构地区：[1]国网天津市电力公司经济技术研究院,天津300171 [2]国网天津市电力公司,天津300010

出　　处：《电力系统及其自动化学报》2022年第1期114-120,共7页Proceedings of the CSU-EPSA

基　　金：国网天津市电力公司科技项目(KJ18-1-06)。

摘　　要：电力系统和天然气系统通过大量的燃气电厂、电转气设备等紧密耦合在一起,构成了电气耦合综合能源系统,本文提出一种基于分立求解的电气耦合能源系统多能流联合计算方法。首先,建立天然气系统、电力系统,以及耦合环节天然气发电机的模型。然后,提出基于分立求解的电气耦合综合能源系统多能流模型,通过读取天然气发电机的有功出力,计算得到其天然气消耗量,更新天然气系统负荷信息,实现电气耦合综合能源系统的解耦,对解耦后的两系统分别独立求解即可得到待求状态变量。最后,通过算例验证了分立求解方法的可行性和准确性。Through coupling a large number of natural gas-fired power plants and electricity-to-gas equipment,the power system and natural gas system form an integrated electricitygas system(IEGS).In this paper,a multi-energy flow joint calculation method for IEGS is proposed,which is based on discrete solution.First,the models of natural gas sys⁃tem,power system and coupling natural gas generator are established.Then,the multi-energy flow model of IEGS based on discrete solution is put forward.Through reading the active power output from the natural gas generator,the corresponding consumption of natural gas is calculated,and the load information about the natural gas system is updat⁃ed,thus realizing the decoupling of IEGS.Afterwards,the two decoupled systems can be solved independently to obtain the required state variables.Finally,the feasibility and accuracy of the discrete solution method are verified by a numerical example.

关 键 词：燃气电厂 电气耦合能源系统 多能流计算 分立求解 

分 类 号：TM744[电气工程—电力系统及自动化]