基于加权有向图的园区综合能源系统多场景能效评价方法  

A Multi-scenario Energy Efficiency Evaluation Method for District Multi-energy Systems Based on Weighted Directed Graph

作　　者：田立亭[1] 程林[1] 李荣 孙树敏 石超 高文忠 TIAN Liting;CHENG Lin;LI Rong;SUN Shumin;SHI Chao;GAO Wenzhong(State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering,Tsinghua University),Haidian District,Beijing 100084,China;State Grid Shandong Electric Power Company,Jinan 250001,Shandong Province,China;School of Electrical Engineering,Beijing Jiaotong University,Haidian District,Beijing 100044,China)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]国网山东省电力公司,山东省济南市250001 [3]北京交通大学电气工程学院,北京市海淀区100044

出　　处：《中国电机工程学报》2019年第22期6471-6478,6479-6482,共12页Proceedings of the CSEE

基　　金：国家重点研发计划项目(2018YFE0116400);国家电网公司总部科技项目：基于多能互补的微网规划与运行控制技术研究及应用(52060018000N);国家自然科学基金项目(51807107)~~

摘　　要：提高能源利用效率是综合能源系统建设的主要目标之一。该文首先基于热力学第一、第二定律,提出园区综合能源系统能效评价指标;其次,基于加权有向图建立系统等效模型,提出离散化的能量流/[火用]流计算方法和能效评估方法;最后,以典型园区综合能源系统为算例,考虑系统2种运行策略,建立系统能效评估场景,利用信息熵确定各能效指标权重,对系统进行综合能效评价。结果表明,该文提出的系统模型和能效评价方法可充分反映多种能源利用特征,适用于系统能效的预评估,对园区综合能源系统的规划和运行实践具有指导意义。Improving energy efficiency is one of the main goals of multi-carrier energy systems.Based on the first/second law of thermodynamics,this paper put forward the evaluation indices of energy efficiency for district multi-energy system.And a system model based on edge-weighted directed graph was proposed.A discrete energy/exergy flow calculation method and efficiency evaluation method were also given in the paper.The proposed model and method are validated in an industrial park energy system.Two operation strategies are considered in the construction of evaluation scenarios.And the comprehensive energy efficiency is assessed based on information entropy theory.The results show that the proposed system model and energy efficiency evaluation method can fully reflect the characteristics of multi-energy utilization.The proposed method is suitable for the pre-evaluation of energy efficiency and has practical guiding significance for the planning and operation of district multi-energy systems.

关 键 词：多能源系统 综合能效 加权有向图 [火用]效率 [火用]经济 

分 类 号：TM721[电气工程—电力系统及自动化]