基于双层联合优化的电-气综合能源生态系统需求响应模型

Bi-level Joint Optimization Based Multi-energy Demand Response Model for Integrated Electricity and Gas System

提出了一种在电-气综合能源生态系统中,基于双层联合优化的市场化需求侧响应模型。该双层联合优化包括系统层的经济调度以及节点层的能量优化分配。首先,构建了以节点为单位的用户多能灵活负荷模型以及用户参与需求侧相应的经济分析模型,然后提出了电-气综合能源生态系统的稳态潮流模型。在此基础上,提出了电-气综合能源生态系统中需求响应的双层优化模型。系统层优化在获取辅助服务市场上聚合商的需求响应报价基础上,对电气联合传输系统进行集中式能量优化调度。节点层的优化问题为聚合上的能源优化分配模型,即聚合商根据系统购买的需求相应服务,将负荷削减量按照经济性最优的原则分配给用户。建立双层优化问题后,将下层优化问题转化为上层优化的KKT条件,并通过内点法进行求解。最后,通过IEEE 24节点可靠性测试系统和比利时20节点天然气系统的耦合系统,验证了本文提出的电-气综合能源生态系统下的多能需求响应模型的有效性,及其相对于传统电力需求响应的优越性。

this paper proposes a demand response （DR） model based on bi-level joint optimization framework in integrated electricity and gas system （lEGS）, concerning both centralized energy dispatch and nodal energy redistribution. First, multi-energy flexible load model for nodal customer sectors and the corresponding economic model for DR participation is established, and the power flow model of lEGS in steady state with bidirectional energy exchange is built. Afterwards, a hi-level optimization based DR model in IEGS is pro- posed. The system level optimization aims on centralized energy optimal dispatch in transmission system, given the bidding price of DR service in ancillary market given by aggregators. The nodal level optimization focuses on optimal energy purchasing and distribution of load curtailment among individual customers. Then the lower level optimization formulations are converted into the KKT conditions of upper level optimization, and the problem is solved using interior point method. Finally, the coupled system of IEEE 24-node reliabili- ty test system and Belgium 20-node natural gas system shows the effectiveness of multi-energy DR model in IEGS and its superiority to traditional DR model.