四绕组感应滤波变压器的基波运行与无功补偿特性分析  

Analysis of operation and reactive power compensation characteristics for four-winding inductive filtering transformer at fundamental frequency

作　　者：黄肇[1] 罗隆福[1] 石赛美[2] 田野 HUANG Zhao;LUO Longfu;SHI Saimei;TIAN Ye(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Hunan Provincial Key Laboratory of Grids Operation and Control on Multi-power Sources Area,Shaoyang University,Shaoyang 422004,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]邵阳学院多电源地区电网运行与控制湖南省重点实验室,湖南邵阳422004

出　　处：《电力自动化设备》2020年第1期171-176,211,共7页Electric Power Automation Equipment

基　　金：湖南省重点研发计划项目(2017GK2240);湖南省科技计划项目(2016TP1023)~~

摘　　要：依托多绕组变压器的结构、磁势平衡方程、感应滤波实现条件推导出四绕组感应滤波变压器的辐射形等值电路模型,建立了该变压器在基波下的数学模型,基于感应滤波方法分析了四绕组感应滤波变压器的基波运行与无功补偿特性。通过原理样机的MATLAB仿真、实验和某220 kV变电站的工程试验验证了四绕组感应滤波变压器的基波运行特性以及在基波下通过滤波绕组投入电容器可以实现无功补偿。仿真与试验结果表明:在基波下,四绕组感应滤波变压器的运行特性类似于三绕组变压器;投入电容器时稍微抬升了网侧电压有效值,但轻微减小了网侧电流有效值,提高了网侧的功率因数。On the basis of multi-winding transformer structure,magnetic balance equations and implementing restraint of inductive filtering,a radiation equivalent circuit model of a FWIFT(Four Winding Inductive Filtering Transformer)is deduced,a mathematical model is built,and characteristics of operation and reactive power compensation based on inductive filtering method at the fundamental frequency are mainly analyzed.Through a prototype simulation using MATLAB,experiment and an engineering test of a 220 kV substation,it is verified that the operating characteristics and reactive power compensation of the FWIFT can be achieved by the filtering winding connected capacitors at fundamental frequency.The simulative and test results show that the operation function of the FWIFT is similar to the traditional three winding transformer,and the grid-side voltage RMS(Root-Mean-Square)values are slightly increased,but the current RMS values are moderately reduced,and so that the power factor is improved at fundamental frequency.

关 键 词：四绕组感应滤波变压器 等值电路模型 无功补偿 电容器 感应滤波方法 

分 类 号：TM411.2[电气工程—电器] TN713[电子电信—电路与系统]