张曦,柯德平,徐箭,孙元章,徐全.配电网综合负荷机理模型闭环辨识研究[J].电测与仪表,2022,59(5):94-101. Zhang Xi,Ke Deping,Xu Jian,Sun Yuanzhang,Xu Quan.Research on integrated load mechanism model closed-loop identification of distribution network[J].Electrical Measurement & Instrumentation,2022,59(5):94-101.
配电网综合负荷机理模型闭环辨识研究
Research on integrated load mechanism model closed-loop identification of distribution network
Power system has natural closed-loop characteristics. The load model parameters identification based on measurement signals has obvious closed-loop characteristics when the injection position of excitation signals is different from the measurement position of identification signals. In this paper, the identification of load mechanism model parameters under closed-loop condition is studied by taking the distribution area modeling scenario as an example. Through the comparison and analysis of common closed-loop identification methods, the basic conditions for closed-loop identification of mechanism model are summarized. Based on this condition, a two-stage identification method which can directly identify the original system model without prior knowledge of feedback channel model is selected .At the second stage of two-stage identification method, the load mechanism model is linearized and converted into a discrete transfer function form to realize the online identification of mechanism model parameters. Through simulation analysis, the closed-loop characteristics of power system modeling and the effectiveness of the proposed two-stage identification method are verified.
