A New Robust Identification Method for Transmission Line Parameters Based on ADALINE and IGG Method

IEEE Access

Quan Xu¹  Yuehuan Lin¹  Zhiyong Yuan¹  Li Wang²  Yongzhao Lao²  Guoen Wei²  Feiyang Xu³  Ancheng Xue³  Shuang Leng³  He Kong³ 

[1] Electric Power Research Institute, China Southern Power Grid Company Ltd., Guangzhou, China;Guangzhou Power Supply Bureau, Guangdong Power Grid Ltd., Guangzhou, China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Beijing, China;

关键词: PMU;    ADALINE;    robust IGG;    transmission line parameters identification;    bad data;    median estimation;   

DOI  :  10.1109/ACCESS.2020.3010419

来源: DOAJ

【 摘 要 】

Accurate transmission line parameters are the basis of power system calculations. Aiming at obtaining accuracy online transmission line parameters in the case of large random noises even bad data in Phasor Measurement Unit (PMU) measurements, which occurs frequently in the practice, a new adaptive robust identification method combining adaptive linear neuron (ADALINE) and traditional robust IGG (Institute of Geodesy & Geophysics, Chinese Academy of Sciences) method is proposed. In detail, first, the identification model of transmission line parameters is presented based on the multi-period PMU measurements at both ends of the transmission line. Then, a parameter solving model based on ADALINE is established. Furthermore, to fully use measurement information, the adaptive robust ADALINE (ARA) are proposed, which applies the robust IGG weight function (Scheme I) to ADALINE to realize “three segments” robust identification. In addition, to improve the robustness, the expectation and variance of the equation residual sequence are estimated adaptively with the median principle to adjust the threshold for the IGG function to assure robustness (TAR), which is independent of the known information for the error of the measurement equipment. The cases based on PSCAD simulated data and measured data show the effectiveness and engineering practicality of the proposed method.

【 授权许可】

Unknown