文章摘要
曹文斌,尹项根,王育学,等.高阻抗电力变压器涌流的特殊性比较分析[J].电力系统自动化. DOI: 10.7500/AEPS20180705003.
CAO Wenbin,,, et al.Comparative Analysis of particularity for Inrush Current Generated by High-impedance Transformer[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180705003.
高阻抗电力变压器涌流的特殊性比较分析
Comparative Analysis of particularity for Inrush Current Generated by High-impedance Transformer
DOI:10.7500/AEPS20180705003
关键词: 高阻抗电力变压器  高压绕组内置型  低压绕组串抗型  普通变压器  涌流特殊性比较。
KeyWords: high-impedance power transformer  the kind with high-voltage winding built-in  the kind with inductance connected in series at low-voltage winding  traditional transformer  air-core inductance  particularity of inrush current
上网日期:2019-07-10
基金项目:国家重点研发计划
作者单位E-mail
曹文斌 强电磁工程与新技术国家重点实验室华中科技大学 1019097704@qq.com 
尹项根 强电磁工程与新技术国家重点实验室华中科技大学 yxg 
王育学 广东电网电力调度控制中心 wyx 
张哲 强电磁工程与新技术国家重点实验室华中科技大学 zhangzhe 
郭乾 强电磁工程与新技术国家重点实验室华中科技大学 guoqian 
潘远林 强电磁工程与新技术国家重点实验室华中科技大学 2410329909@qq.com 
摘要:
      针对近年多次出现的高阻抗变压器投运时零序过流保护误动事故,本文围绕高阻抗变压器涌流的特殊性展开研究。首先明晰了变压器“绕组结构-磁通分布-等值电路参数”的对应关系以及励磁涌流产生机理。根据高压内置型高阻抗变压器(内置变)、低压串抗型高阻抗变压器(串抗变)与普通结构型常规阻抗变压器(普通变)的结构差异阐释了等值电路中自漏感和空心电感等参数的差异。基于参数差异,从理论上分析比较了三者涌流的特殊性:相同条件下,内置变涌流幅值大于串抗变和普通变;三者涌流衰减缓慢,相对而言内置变较另两个略快。结论通过了仿真验证。
Abstract:
      In recent years, zero-sequence over-current protections misoperate frequently when the high-impedance transformers energized. This paper focuses on the particularity of high-impedance transformer inrush currents. Firstly, the relationship of “winding structure - flux distribution - equivalent circuit parameters” and the mechanism of the magnetizing inrush current are clarified. According to the structural differences among the high-impedance transformer with high-voltage winding built-in (T-Hin), the high-impedance transformer with inductance connected in series at low-voltage winding (T-Lse) and the traditional transformer (T-Tra), the parameters differences such as self-leakage inductance and air-core inductance in the equivalent circuit are explained. According to the parameters differences, the particularity of inrush currents generated by three kinds of transformers is theoretically analyzed and compared. Under the same conditions, the inrush current amplitude of T-Hin is greater than that of T-Lse and T-Tra. The three inrush currents decay slowly, with the inrush current of T-Hin being slightly faster than the other two relatively. The conclusion is verified by simulation.
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