励磁涌流

由于变压器铁磁材料的作用，磁感应强度B和磁场强度H呈非线性关系，这也是变压器空载合闸时产生较大励磁涌流的主要原因。

Because of ferromagnetic elements , magnetic induction B and magnetic field H is non-linear , which is the main cause that high inrush current occur during the transformer energisation .

变压器励磁涌流和电流互感器（TA）饱和产生的不平衡电流是引起差动保护误动的两大因素。

Unbalanced currents generated by transformer inrush current and current transformer ( TA ) saturation are two major factors .

ZnO避雷器式故障限流器对变压器励磁涌流的影响分析

The Impact of MOA-based Fault Current Limiter on Transformer Magnetizing Inrush Current

采用实际变压器励磁涌流数据进行的分析和基于DSP保护装置的程序实验表明该判据是有效的，具有一定的实际价值。

The analysis of data of inrush current and the experiment based on DSP indicated the effect of criterion .

该方法能有效的区分牵引变压器内部故障与外部故障、励磁涌流等情况，用EMTP及MATLAB进行仿真计算，验证了该方法的可行性和有效性。

Simulation results by using EMTP and MATLAB demonstrate the feasibility and availability .

基于ATP数字仿真的变压器励磁涌流和内部故障的研究

Research for Inrush Current and Internal Fault of Transformers based on Digital Simulation of ATP

结果表明：RBF神经网络可以正确地区分励磁涌流和短路电流。

The results showed that RBF NN can distinguish magnetizing inrush currents from internal fault currents correctly .

故障电流与励磁涌流的EMD特性分析

Characteristics analysis of fault current and inrush based on EMD

中抽式Scott变压器励磁涌流与稳态仿真研究

Study on Inrush Current and Stead-State Operation Simulation of the Scott Transformer with Secondary Midpoint Drawn-Out

基于小波包和LS-SVM的变压器励磁涌流与短路电流识别方法

Recognition of Transformer Inrush Current and Fault Current Based on Wavelet Packet and LS-SVM

基于Prony分析的励磁涌流识别方法

An inrush current identification method based on Prony analysis

变压器差动保护的励磁涌流制动方法欠励磁无功电流限制（URAL）。

Inrush current restraint scheme of power transformer differential protection Under excited reactive ampere limit ( URAL ) .

针对TA饱和、站用变保护、励磁涌流过大和保护整定的问题，分别从理论上进行分析，提出了相应的解决办法。

These problems caused by TA saturation , station transformer protection , excessive excitation inrush current and protection setting are analyzed in theory respectively , and the corresponding technical measures are proposed .

本文利用仿真软件Saber，综合考虑电路、磁路2个方面，建立了考虑磁滞效应和饱和效应的变压器仿真模型，可以实现对励磁涌流和包括匝间短路的多种故障情况进行全面系统的仿真计算。

A transformer model considering the hysteresis effect and the saturation is presented first and magnetic inrushes and short-circuit faults are simulated with this model .

通过对500kV变压器在不同合闸初相角及剩磁状态下空载合闸时的励磁涌流与变压器正常状态下的励磁电流的仿真分析，验证了该模型的正确性。

Simulation of the transformer magnetic inrush current under different closing phase angle , remanent magnetization and the normal current .

利用MATLAB软件对励磁涌流、内部故障以及励磁涌流伴随内部故障的情况进行了仿真实验。仿真结果表明，该方法简单易行，识别效果显著。

In this paper , the simulation of inrush current , internal fault and inrush current associated internal fault is done by using MATLAB . The simulation results show that the new principle is simple and feasible , and it has clear identification ability .

用MATLAB软件仿真研究了中性点不接地系统中电磁式电压互感器在系统正常和接地故障运行的全过程，分析了TV励磁涌流造成熔丝熔断的规律性及开口三角绕组电压异常的原因。

By MATLAB , the transient process of TV in ungrounded power system is simulated , both in normal service or in some kinds of grounding fault conditions . This paper discusses the magnetizing inrush current flowing through TV and the abnormal overvoltage of opened delta-winding .

为提高励磁涌流识别的准确性，根据基于小波分析的信号奇异性检测理论，利用MATLAB仿真工具，选择二进制离散小波函数，对变压器内部故障及励磁涌流仿真模型产生的数据进行分析。

To improve the accuracy of excitation inrush current recognition , according to the signal singularity detection theory of wavelet transform , analysised the simulation data that internal faults of transformer and excitation inrush current by choose MATLAB simulation tools and binary discrete wavelet function .

在分析电磁暂态仿真软件EMTDC（Electro-MagneticTransientinDCSystem）里变压器模型的基础上，构建模型对变压器励磁涌流和内部故障电流进行了仿真，并对仿真结果进行了间断角和二次谐波含量分析。

In this paper , based on the study on the model of electrical transformer in EMTDC ( Electro-Magnetic Transient in DC System ), the simulations for magnetic inrush and fault current of three-phase transformer are done . And analysis are given to the simulation .

利用实时数字仿真器（RTDS）对不同内部故障类型和励磁涌流进行了仿真，算法不受最严重故障（带故障空载投入）以及严重CT饱和情况的影响。

Different types of internal faults and magnetizing inrush are simulated by Real-time Digital Simulator ( RTDS ), this approach is not affected by the sever fault that transformer is energized without load when internal fault occurs and CTs saturate .

高压直流换流站换流系统宽频建模研究500kV高岭换流站换流变空载充电励磁涌流分析

Wide-band Modeling of Converter Systems in HVDC Converter Stations Analysis on Energizing Inrush Current of No-Load Converter Transformer in 500 kV Gaoling Back-to-Back Converter Station

通过算例验证了短窗Morlet复小波算法的效果，并应用于实验室变压器合闸过程的励磁涌流分析，结果证明了该算法的优越性。

Some examples verify the effect of Morlet complex wavelet algorithm . The analysis results of magnetic inrush currents of a transformer in the laboratory also prove that Morlet complex wavelet algorithm has good capability .

随后本文围绕变压器励磁涌流和TA饱和这两个问题而展开工作，一方面利用PSCAD仿真软件对变压器空载合闸励磁涌流进行仿真的基础上，详细分析了变压器励磁涌流的产生机理及其特点。

On one hand , the generation mechanism and characteristics on the transformer inrush current is analyzed in detail , based on simulation model for transformer switching-on without load . On the other hand , the TA saturation is studied in this paper by MATLAB simulation .

介绍了RADSS型母线中阻差动保护的动作特性。该文提出了一种不受空投时励磁涌流影响的变压器差动保护原理，并用阻抗原理反应空投于内部故障。

The operation characteristics of RADSS type bus medium impedance protection is put forward . This paper introduces a new approach to transformer protection which combines current differential protection and impedance protection .

本文建立了电力机车的简单模型，利用PSCAD／EMTDC仿真软件对电力机车的正常运行、励磁涌流的产生等状况进行了仿真，验证了牵引负荷的特点。

This thesis sets up the model of the electric locomotive , simulates the situation of the locomotive 's normal running and the production of excitation etc by using PSCAD / EMTDC simulation software . The result confirms the characteristic of the traction load .

经HYBRISIM的仿真验证，新原理能够有效地区分励磁涌流和故障电流，受CT饱和影响小，在性能上优于二次谐波制动判据和波形比较判据。

Simulation results of HYBRISIM ( Hybrid Simulator ) show that this algorithm is able to distinguish the inrush and fault current and immune to CT 's saturation . Compacted with the second harmonic restraint principle and the waveform comparison principle , the proposed algorithm has better performance .

通过小波变换对RTDS输出的变压器两侧信号数据进行多尺度分解，提取新特征得到故障跳，并利用故障跳乘积符号来区分励磁涌流和内外部故障，得到新算法。

Then , the output data from RTDS is analyzed by WT of Matlab to analyze sample current signals of both sides of transformer and get the product of fault-jump in order to distinguish between inrush current and internal fault current only to get the new arithmetic .

直流助磁特性能使BCH-2型差动继电器可靠地躲过外部短路时暂态不平衡电流的非周期分量及变压器空载投入时的励磁涌流，从而有效避免保护装置的误动作。

The DC additional magnetic features can make the BCH-2 model differential relay to avoid reliably from the exciting surge produced by non-cycle component of transient unbalanced current under external short-circuit and put-in of idle transformer in order to prevent the protective device from maloperation .

分析了750kV变压器励磁涌流和过励磁的问题，针对励磁涌流提出了Δ→Y变换调整变压器差动各侧的电流相位方法，针对过励磁问题提出了软件计算频率和均方根法计算电压的幅值；

Inrush current and over excitation of 750 kV transformer were also analyzed , a novel method of adjusting differential current phase angle of transformer for transforming from delta to wye as well as the methods of calculating frequency by software and calculating voltage amplitude by the root-mean-square were presented .

基于半波傅里叶算法的励磁涌流识别方法

New Method to Identify Inrush Current Based on Half-wave Fourier Analysis