面向电-热综合能源系统的混合状态估计方法

Hybrid state estimation method for electric-thermal integrated energy systems

综合能源系统(IES)涵盖电、热、气等多种能源类型,运行状态复杂、设备动态特性多样,为了保证IES安全可靠运行需要进行状态估计(SE)。在此背景下,针对IES状态估计时效性和准确性较差的问题,提出一种面向IES的混合状态估计方法。首先,分析耦合量测模型对IES量测冗余度的影响,以及量测冗余度增加对热网状态估计效果的影响;其次,在IES中引入分布式状态估计,构建2种不同区域划分场景并进行对比分析;最后,选取30节点电力网络与17节点热网耦合IES进行仿真分析,算例结果验证所提方法的有效性与实用性。

Integrated Energy System(IES)covers a variety of energy such as electricity,heat and gas,which have complex operating states and diverse dynamic characteristics of the equipment.Accurate state estimation(SE)helps IES operate safely and reliably.In this case,a method is proposed for IES mixed state estimation regarding to the poor timeliness and accuracy of IES estimation.Firstly,the influence of the coupling measurement model on the redundancy of IES measurement is analyzed,and the effect of heat network state estimation is improved according to the variation of redundancy.Then,the distributed state estimation is introduced into IES to construct two regional partitioning scenarios on the shared node type and shared line type.Finally,the simulation analysis of IES coupling between a 30-node power network and a 17-node heat network is investigated to verify the effectiveness and practicability of the proposed method.