计及实时需求响应的综合能源信息物理系统可靠性分析

信息通信技术的飞速发展促使能源网络和信息网络耦合程度不断加深,为实时需求响应的实施提供了有效的技术支撑。为充分考察信息网络和需求响应技术对综合能源系统可靠性的影响,提出一种计及实时需求响应的能源-信息耦合系统可靠性评估方法。首先,构建综合能源信息物理系统框架并分析其实时需求响应机理;其次,建立信息传输可靠性模型,并采用混合蒙特卡洛法抽样元件状态、生成多时段故障场景;再次,将元件状态变量纳入能量平衡约束,以购能成本、负荷削减成本和需求响应成本最低为目标,建立最优负荷削减模型;然后,提出能源信息物理系统可靠性评估指标及评估流程;最后,通过算例分析了实时需求响应、物理域元件以及信息域元件对可靠性的影响,同时量化分析了物理元件和信息元件在系统中的重要程度。算例结果表明,不同元件对能源信息物理系统可靠性的影响不同,实时需求响应能够有效提升其运行经济性和可靠性;文章所述方法能够有效识别能源信息物理系统物理域和信息域薄弱环节,为其经济运行和强化建设提供参考。

Reliability Analysis of Integrated Energy Cyber Physical System Considering Real-Time Demand Response

With the rapid development of information and communication technologies, the coupling between energy network and information network is deepening, and the implementation of real-time demand response has received effective technical support. In order to find out the impact of information network and demand response technologies on the reliability of integrated energy system, this paper proposes a reliability assessment method for energy-information coupled system taking into account real-time demand response. Firstly, the framework of integrated energy cyber physical system (CPS) and its real-time demand response mechanism are introduced. Secondly, considering the reliability model for information transmission, the hybrid Monte Carlo method is used for component states simulation and multi-period failure scenarios simulation. Thirdly, the state variables of components are incorporated into the energy balance constraints and optimal load reduction model with the objective of minimizing the costs of energy purchase, load reduction and demand response is established. Then, the reliability assessment indices and evaluation process of integrated energy cyber physical system are proposed. Finally, the effect of real-time demand response, physical domain components and information domain components on reliability is analyzed, and the importance of physical components and information components is quantified. The results show that different components have different effects on the reliability of integrated energy CPS and real-time demand can effectively improve its operating economy and reliability; the method proposed can effectively identify weak links in the physical domain and information domain of energy CPS. The results can provide a reference for the economic operation and enhancement construction of energy CPS.