计及需求响应和储能的电-气综合能源系统优化调度

为实现电-气综合能源系统(integrated electricity-gas system,IEGS)优化经济运行,计及多元储能(multi-energy storage,M ES)设备和综合需求响应(integrated demand response,IDR)项目的有效配合,提出了一种适合于区域IEGS的优化调度模型。在所构建的优化调度模型中,结合不同用能负荷的需求响应特性,并基于电力和天然气等能源的分时价格,分别从可削减负荷、可转移负荷和可替代负荷等方面对用户IDR响应量进行精细化描述,使其有效配合IEGS中M ES设备运行,从而最小化系统运行成本。通过相关算例验证了所提模型的有效性,仿真结果表明,区域IEGS运营商通过综合应用MES和IDR,可充分发挥电力负荷和天然气负荷的时空互补特性,最大程度地提升系统的风电消纳能力,并进一步减少系统运行成本。

Optimal Dispatching of Integrated Electricity-Gas System Considering Demand Response and Energy Storage

In order to optimize the economic operation of integrated electricity-gas system (IEGS) and take into account the effective cooperation of multi-energy storage (MES) equipment and integrated demand response (IDR), an optimal dispatching model suitable for regional IEGS is proposed in this paper. In the optimal dispatching model, combined with the demand response characteristics of different energy loads, according to the prices of electric power and natural gas, the IDR of terminal users is described in detail from the aspects of curtailable load, shiftable load and transformable load, so that they can effectively cooperate with the operation of MES equipment in IEGS to minimize the operating costs of the system. The validity of the proposed model is verified by relevant examples. The simulation results show that the regional IEGS operators can fully utilize the space-time complementary characteristics of electric power and natural gas loads through the comprehensive application of MES and IDR, maximize the wind power accommodation capacity of the system, and further decrease the operation costs of the system.