电-热综合能源系统能流的区间计算算法

为描述电、热负荷不确定性对综合能源系统的影响,建立了电-热综合能源系统区间能流模型。首先,计及电-热综合能源系统负荷的不确定性,分别建立了电力网络区间模型和热力网络区间模型。然后,考虑热电联产机组、水泵和热泵建立了一种更符合实际情况的电热耦合元件区间模型。最终,通过电热耦合元件实现了电力网络和热力网络的耦合,建立了电-热综合能源系统区间能流模型。针对传统的区间迭代法存在的计算结果区间易于扩张的问题,采用基于区间扩展的迭代算法对电-热综合能源系统区间能流模型进行求解。对IEEE33节点系统和32节点热力系统构成的电-热综合系统进行算例分析,结果验证了所建区间模型和所提算法的正确性。

An Interval Energy Flow Calculation Method for Integrated Electro-Thermal Energy System

In order to describe the impact of uncertainty of electrical and thermal loads on integrated energy system,an interval energy flow model for integrated electro-thermal energy system was proposed.Firstly,taking into account uncertainty of the loads of the integrated system,a power network interval model and a heat network interval model were established respectively.Then,considering the combined heat and power unit,circulation pump and heat pump,an interval model for the electro-thermal coupling element in accordance with actual situations was established.Finally,coupling between power network and thermal network was realized with electro-thermal coupling elements,and an interval energy flow model of the integrated system was established.Aiming at the problem that the calculated interval results is easy to expand in traditional interval iterative method,an iterative method based on interval expansion was used to solve the interval energy flow model for the integrated system.Validity of the proposed interval model and the solution method is verified with an integrated electricity and heat energy system composed of the IEEE-33 system and a 32-node heat network.