电力系统自动化2017，Vol.41Issue(8)：159-165,7.DOI:10.7500/AEPS20161014001
控制合闸电压幅值的变压器励磁涌流抑制方案
Transformer Inrush Current Restraining Scheme Based on Switching Voltage Amplitude Controlling Method
摘要
Abstract
A scheme of restraining transformer inrush current based on control by switching voltage amplitude is proposed based on analyzing the influencing factors of transformer inrush current and deriving the mathematical relationship between inrush current and influencing factors.In this scheme, in order to make sure that the magnetic flux produced by the transformer no-load closing does not exceed saturated magnetic flux, the voltage amplitude should be controlled by selecting an appropriate curve, thus attaining the goal of restraining the transformer inrush current.The control function of voltage amplitude is derived from the magnetic flux inequality and the attenuation law of the transient flux component, and the upper and lower limitations of the initial value and slope in the voltage amplitude control function are deduced.The no-load closing process of a single-phase and three-phase transformer each in different conditions is simulated by using PSCAD/EMTDC, and the parameters such as magnetic flux, excitation inrush current and differential current are analyzed.The simulation results show that by controlling the voltage amplitude, the inrush currents can be restrained.Using this scheme, the value of inrush current can be kept in a small range to better overcome the influence of transformer inrush current.关键词
变压器空载合闸/励磁涌流抑制/合闸电压/幅值控制Key words
transformer no-load closing/transformer inrush current restraining/switching voltage/amplitude controlling引用本文复制引用
丛伟,王伟旭,肖静,盖午阳,冯迎春..控制合闸电压幅值的变压器励磁涌流抑制方案[J].电力系统自动化,2017,41(8):159-165,7.基金项目
国家自然科学基金资助项目(51377100) （51377100）
山东省自然科学基金资助项目(ZR2013EEM029).This work is supported by National Natural Science Foundation of China (No.51377100) and Shandong Provincial Natural Science Foundation of China (No.ZR2013EEM029). （ZR2013EEM029）
