An Exergy Analysis Model for the Optimal Operation of Integrated Heat-and-Electricity-Based Energy Systems  

作　　者：Jianrun Chen Haoyong Chen Zipeng Liang Xiaodong Zheng Dongliang Xiao Yirui Li Huaguang Yan 

机构地区：[1]South China University of Technology,China [2]School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,China [3]Department of Electrical Engineering,Hong Kong Polytechnic University,Hong Kong SAR,China [4]Department of Electric Power,South China University of Technology,Guangzhou,China [5]Electricity Using and Efficiency Department,China Electric Power Research Institute

出　　处：《Protection and Control of Modern Power Systems》2024年第1期1-18,共18页现代电力系统保护与控制（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51937005).

摘　　要：Exergy analysis is a unified approach to evaluating the quantity and quality of energy in integrated energy systems(IESs).However,exergy analysis models have been relatively underexplored for IES operation in energy transmission networks.This study addresses this gap by developing an input-benefit exergy model and an exergy loss calculation model for each link within heat-and-electricity-based IESs(HE-IESs),encompassing the transmission networks.Then,an exergy-based unified optimal operation model for HE-IESs is introduced by minimizing the total exergy loss of the system.In addition,the effect of load rate on the energy efficiency of energy conversion equipment is considered.By applying piecewise linearization to the non-convex terms in the objective function and the equality constraints,the proposed optimization model is accurately and efficiently analyzed as a mixed-integer second-order cone pro-gramming problem.The case study results demonstrate that the proposed model reduces equipment-related ex-ergy loss,with approximately 3.2 times the heat net-work-related exergy loss.Moreover,the average deviation gaps of the overall system's exergy loss and equipment's output exergy power between the proposed and the existing models reach 12.94%and 27.83%,respectively.The maximum relative error of the solution results with the proposed linearization method remains below 1.2%,satisfying the requirements of practical application.

关 键 词：UNIFIED LINEARIZATION satisfying 

分 类 号：TM732[电气工程—电力系统及自动化]