【摘要】 现有综合能源系统(integrated energy systems,IES)优化研究缺乏统一同质化工作,且主要集中于输电网,不适用于电阻电抗比值较高的配电网。网络流模型具有统一表示输配电网、天然气网能量流动和分配情况的能力,并能以可视化的形式将能量流清晰展现。文章基于IES能量传递的内部本质相同和外部特征相似等特性,构建了以系统总经济成本最小化为目标和系统安全为约束的气电综合能源系统(gas-electricity integrated energy system,GEIES)统一同质化网络流模型,将异质能源同质化到统一网络流平台进行计算。算例分析表明,该模型不受网架结构限制且形式清晰直观,对应算法求解速度快且能保证线性收敛。所提模型能够合理反映涵盖配电网IES的稳态特性,为多能流同质化统一优化调度提供参考。更多还原

【Abstract】 Current research on integrated energy system(IES) optimization lacks unified and homogeneous work. Due to the main focus on the power transmission grid,it is also not suitable for distribution network with high resistance-to-reactance ratio.The network flow model has the ability to unify and visually represent the energy flow of the transmission grid,distribution network and natural gas network. In this paper,since the characteristics of IES are the same internal essence and similar external forms,a unified homogeneous network flow model of the gas-electricity IES is constructed with the goal of minimizing the total system economic cost and the constraints of system safety are constructed. Heterogeneous energy is homogenized to the unified platform for calculation. Case studies show that this model can clearly show the energy flow and has no limitation of the grid structure. The corresponding algorithm can quickly converge linearly. It can reasonably reflect the characteristics of IES including the distribution network,and provide a reference for unified optimization dispatch of multi-energy flow.更多还原