摘要
热网动态特性带来能量传输延时的同时,使得空间上的源荷不确定性对系统造成的影响存在时序上的先后差异,导致电-热互联系统日前调度转变为复杂的时空耦合问题。为此,该文提出一种计及网络动态特性的仿射优化法。首先,利用流量分段法与节点网络模型,构建计及能量传输延时且适用于环网的热网动态模型。在此基础上,利用仿射算法与牛顿-拉夫逊能流计算原理,通过线性化建模方式与模型凸化方法,构建仿射凸优化模型。其次,利用仿射优化法解决电-热互联系统不确定性优化调度问题,实现对源荷不确定性传播轨迹的跟踪及其影响的量化分析。最后,33节点电-热互联系统仿真算例证明,所提方法能够揭示网络动态特性下源荷不确定性影响机理,并获得具有低保守性、高经济性的调度方案。
The dynamic characteristics of heat network bring the energy transmission delay and make the influence of the spatial uncertainty sources different in time.It leads to the day-ahead dispatch of combined electric and heat system into a complex spatiotemporal coupling problem.Therefore,an affine optimization method considering the dynamic characteristics is proposed.First,the flow segmentation method and the node network model are used to establish a heat network dynamic model,considering transmission delay and suitable for looped network.On this basis,through the linearization modeling and the model convexification,the affine convex optimization model is established by the affine algorithm and the Newton-Raphson energy flow calculation principle.Then,the uncertain optimization dispatch problem of the system is solved by the affine optimization method,while keeping track of the uncertainty sources and quantifying their influence.Finally,the simulations are carried out on a 33-nodes combined electric and heat system.The results show that the proposed method can reveal the influence mechanism of uncertainty sources under the dynamic characteristics of network,and obtain a scheme with low conservativeness and high economy.
作者
陈飞雄
蔡明杰
郭奕鑫
邵振国
CHEN Feixiong;CAI Mingjie;GUO Yixin;SHAO Zhenguo(Fujian Smart Electrical Engineering Technology Research Center(College of Electrical Engineering and Automation,Fuzhou University),Fuzhou 350108,Fujian Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2024年第12期4715-4731,I0010,共18页
Proceedings of the CSEE
基金
国家自然科学基金项目(52107080,51777035)
福建省自然科学基金项目(2021J05135)
福建省自然科学基金重点项目(2020J02028)。
关键词
电-热互联系统
热网动态特性
不确定源跟踪
仿射算法
日前调度
combined electric and heat system
dynamic characteristics of heat network
track of uncertainty sources
affine arithmetic
day-ahead dispatch
