Network Modeling and Operation Optimization of Electricity-HCNG-Integrated Energy System  

作　　者：Yue Qiu Suyang Zhou Wei Gu Yuping Lu Xiao-Ping Zhang Gaoyan Han Kang Zhang Hongkun Lyu 

机构地区：[1]School of Electrical Engineering,Southeast University,Nanjing 210096,China [2]School of Electronic Electrical and Systems Engineering,University of Birmingham,Birmingham,UK. [3]Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China

出　　处：《CSEE Journal of Power and Energy Systems》2023年第4期1251-1265,共15页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by the Science and Technology Project of State Grid Corporation of China(No.5100-202119574A-0-5-SF)。

摘　　要：Hydrogen-enriched compressed natural gas(HCNG)has great potential for renewable energy and hydrogen utilization.However,injecting hydrogen into the natural gas network will change original fluid dynamics and complicate compressed gas's physical properties,threatening operational safety of the electricity-HCNG-integrated energy system(E-HCNG-IES).To resolve such problem,this paper investigates effect of HCNG on gas network dynamics and presents an improved HCNG network model,which embodies the influence of blending hydrogen on the pressure drop equation and line pack equation.In addition,an optimal dispatch model for the E-HCNG-IES,considering the“production-storage-blending-transportation-utilization”link of the HCNG supply chain,is also proposed.The dispatch model is converted into a mixed-integer second-order conic programming(MISOCP)problem using the second-order cone(SOC)relaxation and piecewise linearization techniques.An iterative algorithm is proposed based on the convex-concave procedure and bound-tightening method to obtain a tight solution.Finally,the proposed methodology is evaluated through two E-HCNGIES numerical testbeds with different hydrogen volume fractions.Detailed operation analysis reveals that E-HCNG-IES can benefit from economic and environmental improvement with increased hydrogen volume fraction,despite declining energy delivery capacityand line pack flexibility.

关 键 词：Electricity-HCNG-integrated energy system(E-HCNG-IES) hydrogen-enriched compressed natural gas(HCNG) improved HCNG network model optimal dispatch. 

分 类 号：TM732[电气工程—电力系统及自动化]