高电压技术2025，Vol.51Issue(2)：890-902,中插36-中插37,15.DOI:10.13336/j.1003-6520.hve.20231781
天然气管网动态等效电路模型及其在电-气耦合系统动态仿真中的应用
Dynamic Equivalent Circuit Model of Natural Gas Pipeline and Its Application in Dynamic Simulation of Electricity-gas Coupled System
摘要
Abstract
With the growing interdependence of power and natural gas(NG)systems,it is essential to perform a com-prehensive and integrative analysis of the electricity-gas coupled system.Consequently,a dynamic modeling method for an NG network based on circuit analogy was proposed.The dynamic model of the NG network was constructed in power system simulation software.Firstly,the partial differential equations(PDEs)that described the dynamics of the gas pipe-line were converted to ordinary differential equations(ODEs)based on the difference approximation.Through the analogy of the pneumatic quantity to the electrical quantity,an equivalent circuit model of the NG pipeline was con-structed,in which the time-varying fluid resistance and incorporates constant impedance parameter were taken into account.Based on the regulator valve's pressure and throttling features,a constant impedance equivalent circuit model was set up and used to simulate its pipeline regulation characteristics.An electricity-gas coupled system was established,employing a single-shaft gas turbine as the energy conversion component.Subsequently,an in-depth analysis was con-ducted regarding the dynamic interaction impacts between the natural gas network and the power system.The simulation results demonstrate that the equivalent circuit model proposed in this paper exhibits high accuracy,and the model with constant impedance parameters can effectively enhance the simulation efficiency.Load fluctuations or valve malfunctions in the NG network can cause gas turbine output power instability and further affect the power grid,while gas turbine power modifications also influence the NG network flow and pressure distributions.关键词
电-气耦合系统/天然气管道/调节阀/等效电路/恒定阻抗参数Key words
electricity-gas coupled system/natural gas pipeline/regulator valve/equivalent circuit/constant impedance parameter引用本文复制引用
宋瑞凯,杜松怀,夏越,陈颖,苏娟,方旺..天然气管网动态等效电路模型及其在电-气耦合系统动态仿真中的应用[J].高电压技术,2025,51(2):890-902,中插36-中插37,15.基金项目
国家自然科学基金(52007194).Project supported by National Natural Science Foundation of China(52007194). （52007194）
