基于基波正、负序分量的配电变压器绕组参数辨识  

Distribution transformer coil parameter identification based on positive and negative sequence components of fundamental wave

作　　者：姜欣洁 咸日常[1] 王在明 耿凯 JIANG Xinjie;XIAN Richang;WANG Zaiming;GENG Kai(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;Shandong Huineng Electric Co.,Ltd,Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东淄博255000 [2]山东汇能电气有限公司,山东淄博255000

出　　处：《现代电子技术》2021年第18期69-72,共4页Modern Electronics Technique

基　　金：国家“十三五”重点研发计划(2016YFB0901303);国网山东省电力公司科技项目(SGTYHT/18⁃JS⁃208)。

摘　　要：为了研究利用配电变压器稳态运行电气量实现其绕组电阻和电感参数的实时辨识,根据配电网运行特点,提出基于运行电压电流信号的基波正、负序分量的配电变压器绕组参数辨识方法。首先建立配电变压器回路电压平衡方程,在此基础上得到基波正序和负序分量下的最小二乘辨识模型方程;然后构造基于二阶广义积分器的基波正、负序分量提取方法;最后通过试验分析配电变压器在不同运行工况下绕组参数在线辨识的有效性。试验结果证明,该方法的参数辨识精度不受配电变压器三相负荷不平衡和一次侧单相接地故障的影响,同时也不受系统谐波的干扰。A method to identify the coil parameters of distribution transformer based on the positive and negative sequence components of fundamental wave is established on the basis of the characteristics of distribution network operation to study the real⁃time identification of the coil resistance and inductance parameters for stable operation of the distribution transformer.The least square identification model equation of the fundamental wave positive and negative sequence components was obtained on the basis of the voltage balance equation of the distribution transformer circuit.Then a method based on the second⁃order generalized integrator to extract the positive and negative components of the fundamental wave is established.The effectiveness fo on⁃line identification for the coil parameters of the transformer under different operating conditions is analyzed by means of a simulation experiment.The simulation experiment results show that the parameter identification accuracy of this method is not affected by the three⁃phase load imbalance of distribution transformer and also by the interference of the system harmonics.

关 键 词：绕组参数辨识 配电变压器 基波分量 分量提取 有效性分析 谐波干扰 

分 类 号：TN722.74-34[电子电信—电路与系统] TM421[电气工程—电器]