摘要
多种能源形式的互补与耦合为多能源系统集成带来巨大价值,但不同能源形式遵循不同的物理规律和数学表征形式,为综合分析与协同优化带来了挑战。文中基于拉普拉斯变换这一分析系统动态过程的有力工具,提出了多能源网络的广义电路分析理论。首先,建立了多能源网络支路层能量流的统一数学方程,提出了以拉普拉斯变换为基础的广义电路建模方法,将多能源网络在时域的复杂传输特性转换为拉普拉斯域简单的代数问题,提出了各能源系统能量流的分布参数电路模型,进一步提出了以"支路"为整体单位的支路层能量流集中参数传输模型。文中提出的多能源网络广义电路支路模型能够科学地分析支路层能量流的稳态与动态特性,揭示多能源网络能量流的共性,为多能源系统全网络分析奠定基础。
The complementarity and coupling of various energy forms bring great value to the multi-energy system integration.However, different energy systems follow different physical laws and mathematical representations, which challenges the comprehensive analysis and coordinated optimization. Based on Laplace transform, a powerful tool for modeling the dynamic process of a system, this paper proposes a generalized electric circuit analysis theory for multi-energy networks. Firstly, a unified mathematical equation of heterogeneous energy flow in multi-energy networks is established, and the modeling method of generalized electric circuit is proposed based on the Laplace transform. The complex transmission characteristics of multi-energy networks in time domain are transformed into simple algebraic problems in Laplace domain, and the electric circuit model of distributed parameters for energy flow in each energy system is proposed. The lumped-parameter transmission model in branch layer is then proposed, which acts branch as the whole unit. The proposed branch model of generalized electric circuit can scientifically analyze the steady-state and dynamic characteristics of power flow in branch layer and reveal the commonness of energy flow of multi-energy networks, which lays the foundation for the full network analysis of multi-energy systems.
作者
杨经纬
张宁
康重庆
YANG Jingwei;ZHANG Ning;KANG Chongqing(State Key Laboratory of Control and Simulation of Power System and Generation Equipments,Tsinghua University,Beijing 100084,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2020年第9期21-32,共12页
Automation of Electric Power Systems
基金
国家自然科学基金重点国际(地区)合作研究项目(51620105007)
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重点项目(U1766212)。
关键词
多能源系统
广义电路
能源互联网
供热网
燃气网
电热耦合
电气耦合
multi-energy system
generalized electric circuit
Energy Internet
heat supply network
gas network
electricity-heat coupling
electricity-gas coupling
