计及网络动态特性的电—气—热综合能源系统日前优化调度

电—气—热综合能源系统的互联是提高系统运行灵活性与可再生能源消纳能力的有效手段之一。在详细分析热网与气网动态特性基础上,提出一种同时考虑气、热网络动态特性的电—气—热互联系统日前优化调度模型。首先,针对热网与气网的动态特性进行建模分析,挖掘其相应动态特性下所对应的储能能力。然后,建立兼顾气、热网络动态特性的综合能源系统日前优化调度模型,将模型线性化并进行求解。最后,构建仿真系统,计算分析管网动态特性对系统优化运行的影响,以及不同网络间的动态特性作用关系与协同优化潜力,所得结果证明了在综合能源系统中计及网络动态特性的必要性与可行性。

Day-ahead Optimal Scheduling of Electricity-Gas-Heat Integrated Energy System Considering Dynamic Characteristics of Networks

The interconnection of the electricity-gas-heat integrated energy system is an effective way to improve the operational flexibility and the ability to accommodate renewable energy. An optimal scheduling model considering dynamic characteristics of heating and gas networks is proposed based on detailedly analyzing the dynamic characteristics of heating and gas networks. First of all, the dynamic characteristics of heating and gas networks are modeled and analyzed, and their energy storage capacities are explored. Then, an optimal scheduling model of the electricity-gas-heat integrated energy system is established and transformed into a linear model to solve the problems. Finally, the impact of the network dynamic characteristics on the system operation is simulated by developed simulation system, and the interaction between different dynamic characteristics and the potential benefits of the collaborative optimization are analyzed, which proves the necessity and feasibility of considering the network dynamic characteristics into the operation of integrated energy system.