综合能源系统分析的统一能路理论(四):天然气网动态状态估计  

Energy Circuit Theory of Integrated Energy System Analysis(Ⅳ):Dynamic State Estimation of the Natural Gas Network

作　　者：尹冠雄 陈彬彬 孙宏斌[1] 郭庆来[1] YIN Guanxiong;CHEN Binbin;SUN Hongbin;GUO Qinglai(State Key Laboratory of Control and Simulation of Power System and Generation Equipment(Department of Electrical Engineering,Tsinghua University),Haidian District,Beijing 100084,China)

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机工程与应用电子技术系),北京市海淀区100084

出　　处：《中国电机工程学报》2020年第18期5827-5836,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51537006)。

摘　　要：天然气网是综合能源系统的重要组成部分,为实现其能量管理,需要利用状态估计技术获取实时、可靠、一致、完整的网络状态信息。然而,实际天然气网络的流量、压力调节较为频繁,现有的稳态状态估计模型无法考虑网络的动态过程。该文基于统一能路理论中的气路模型,首次建立了天然气网络的动态状态估计模型,将管道中复杂的时域偏微分方程转化为了易于优化求解的频域线性代数方程,进一步测试了模型在状态估计精度和坏数据辨识方面的性能。算例表明,所建立的模型可有效过滤量测噪声和坏数据,补齐系统缺失量测,准确估计天然气网络的动态过程。Natural gas networks are one of the most important parts of the energy internet. To achieve the energy management of the natural gas networks, it is essential to obtain the real-time running states, which depends on the state estimation technology. However, the frequent regulation of the flow and pressure results in the dynamics of the network, which cannot be tracked by the steady estimator. In this paper, based on the gaseous circuit model of the energy circuit theory, a dynamic state estimation model of the natural gas networks was proposed, which proves to be easily solved. The accuracy and bad data identification performance of the state estimation were tested. Case studies show that the proposed approach can effectively filter the measurement noise and bad data, and get the accurate estimation of the dynamic process in the natural gas network.

关 键 词：天然气网络 动态状态估计 统一能路 气路 坏数据辨识 

分 类 号：TM721[电气工程—电力系统及自动化]