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多能源网络的广义电路分析理论——(二)网络模型
作者:
作者单位:

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,北京市 100084;2.清华大学电机与应用电子技术系,北京市 100084

作者简介:

杨经纬(1992—),男,博士研究生,主要研究方向:多能源系统、新能源、电力负荷预测。E-mail:yjw15@mails.tsinghua.edu.cn
张宁(1985—),男,副教授,主要研究方向:新能源、电力系统规划及运行、多能源系统。E-mail:ningzhang@tsinghua.edu.cn
康重庆(1969—),男,通信作者,教授,主要研究方向:电力规划与运行、可再生能源、能源互联网、低碳电力技术等。E-mail: cqkang@tsinghua.edu.cn

通讯作者:

基金项目:

国家自然科学基金委员会-国家电网公司智能电网联合基金资助项目(U1766212);国家自然科学基金重点国际(地区)合作研究项目(51620105007)。


Analysis Theory of Generalized Electric Circuit for Multi-energy Networks —Part Two Network Model
Author:
Affiliation:

1.State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Tsinghua University, Beijing 100084, China;2.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

Fund Project:

This work is supported by National Natural Science Foundation of China-State Grid Joint Fund for Smart Grid (No. U1766212) and the Major International (Regional) Joint Research Project of National Natural Science Foundation of China (No. 51620105007).

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    摘要:

    以电力、热力、燃气网络为代表的多能源网络是世界上最为复杂的物理网络之一,是连接能源生产和消费的重要传输环节,也是多能源系统耦合的重要途径。文中借鉴电力系统分析中“矩阵化”与“外端口等值”的思想,基于多能源网络支路层的广义电路模型,提出了网络层的广义电路分析理论。首先,针对多能源网络高维动态特性难以描述的问题,以支路广义电路模型为基础提出了拉普拉斯域通用多能源网络建模方法,并建立了矩阵化的紧凑模型。其次,提出了多能源网络的外端口等值方法,等效地将复杂的内部信息转换为等值的边界条件,既能解决多能源网络的联合分析难题,同时又很好地保护各能源系统数据信息隐私。最后,分别结合热力网络与燃气网络的实际特点,提出了热力网络与燃气网络的全网络广义电路模型与边界等值方法。

    Abstract:

    The multi-energy networks represented by power, gas and heat networks are one of the most complex physical networks in the world, which are also the key components connecting energy production and consumption, as well as the important way of the coupling of multi-energy systems. Based on the generalized electric circuit model of the branch layer in multi-energy systems, this paper proposes the generalized electric circuit analysis theory for the network layer. Firstly, according to the difficulty of representing the high-dimensional dynamic characteristics of multi-energy networks, a generalized modeling method for multi-energy networks in Laplace domain is proposed based on the generalized electric circuit model at branch layer, and the corresponding compact matrix model is also proposed. Secondly, external-port equivalent method of multi-energy networks is proposed, which can transform the complex internal information into equivalent boundary conditions to simplify the coordinated analysis of multi-energy networks and protect the data privacy of each energy system. Finally, combined with the practical characteristics of the heat network and the gas network, the generalized electric circuit model and the boundary equivalent method are proposed for the whole network with heat network and gas network.

    表 1 Table 1
    图1 热网中节点和支路的一般结构与相关变量Fig.1 General structure and relevant variables of nodes and branches in heat network
    图2 对流换热器示意图Fig.2 Schematic diagram of convective heat exchanger
    图3 高压输气网一般结构Fig.3 General structure for high-pressure gas transmission network
    图4 四节点热网算例Fig.4 Case of 4-node heat network
    图5 热负荷日变化曲线Fig.5 Daily variation curve of heat load
    图6 不同模型下热源供热曲线Fig.6 Heat supply curves of heat source in different models
    图7 32节点热力网络算例Fig.7 Case of 32-node heat network
    图8 11节点燃气网算例Fig.8 Case of 11-node gas network
    图9 关键节点气压变化暂态过程计算结果Fig.9 Calculation results of air pressure changes for transient process of key nodes
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引用本文

杨经纬,张宁,康重庆.多能源网络的广义电路分析理论——(二)网络模型[J].电力系统自动化,2020,44(10):10-21. DOI:10.7500/AEPS20200209002.
YANG Jingwei,ZHANG Ning,KANG Chongqing.Analysis Theory of Generalized Electric Circuit for Multi-energy Networks —Part Two Network Model[J].Automation of Electric Power Systems,2020,44(10):10-21. DOI:10.7500/AEPS20200209002.

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历史
  • 收稿日期:2020-02-09
  • 最后修改日期:2020-03-24
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  • 在线发布日期: 2020-05-22
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