自并励励磁系统只采用一台励磁变压器，是自励系统中接线最简单，造价最低廉的一种。
The self and shunt excitation system only have one excitation transformer, and it is the cheapest and the most simple one.
通过研究，系统解决了大容量干式励磁变压器参数优化、谐波含量及谐波损耗计算等技术难题。
Through this research, a series of difficult technical problems on parameter optimization and on calculation of the content and loss of harmonic waves, etc. have been solved.
介绍了励磁变压器因二次侧负荷不平衡引起振动异音及铁心温度异常升高故障的原因分析及处理。
Analysis and treatment of the faults of vibration unusual sound and core temperature abnormal rise in exciting transformer, caused by the unbalance of the secondary side load, are introduced.
为此，提出了防范此类事故的对策，建议引入励磁变压器电源作为调节器的工作电源，并对该机组的转子过电压保护进行改造。
It is suggested that the excitation transformer power be introduced as the operational power supply for the regulator, and the rotor overvoltage protection of the unit be modified.
励磁变压器的串联电抗恶化了晶闸管的换相工作条件，并在晶闸管元件导通与关断瞬间引起危及到转子励磁绕组安全运行的过电压。
In addition, equivalent series reactance of excitation transformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor.
分析了变压器的电磁关系及励磁参数，提出了变压器的等效电路另一形式，并且与现用的等效电路进行比较。
The electromagnetic relation and exciting parameters of transformer are analysed. An another form of transformer equivalent circuit is proposed and is compared with present equivalent circuit.
该保护方案摆脱了励磁涌流的影响，并且避开了变压器难以得到的内部参数。
The scheme gets rid of the influence of excitation inrush current and avoids the difficulty to get internal parameters of transformers.
对涌流瞬态过程进行了分析，研究计算办法并编制了计算软件，可以对变压器空载合闸时的励磁涌流进行计算模拟。
We study the calculating method and program the calculating software to simulate the exciter flow current on the no-load switching-in of transformer.
论述了变压器空载投入时差动保护误动作原因是由励磁涌流引起的，分析了励磁涌流的产生、危害及其特点。
This article discusses the differential protection malfunction of transformers with no-load Input caused by, analyzes the emergence, hazards and characteristics of excitation inrush current.
在分析瞬时功率频谱特性的基础上，提出了一种基于瞬时功率的变压器励磁涌流和内部故障电流识别新方法。
A new method, based on the analysis of frequency spectrum of instantaneous power, for the discrimination between internal fault currents and inrush currents in transformer is proposed.
迄今，变压器差动保护的核心问题仍然是如何准确识别励磁涌流。
So far, the core problem of transformer differential protection is still how to precisely identify the magnetizing inrush current.
在此基础上，提出基于综合隶属度的三取二原则方式来识别涌流，提高了变压器差动保护励磁涌流闭锁的可靠性。
Using the two-out-of-three principle which is based on the integrated membership grade, this new algorithm improves the reliability of transformer protection in blocking inrush current.
经仿真实验表明：该方案能准确地判别出变压器内部故障和励磁涌流，不受系统谐波影响，具有很高的可靠性。
The simulation tests show that the new method can correctly judge the transformer's inrush current and internal fault without the harmonic effect, and it has a good reliability.
在比较励磁涌流和故障电流形成暂态信号各自特点的基础上，提出了一种变压器保护新方案。
Based on different characteristics of transient signals between the short circuit current and the inrush current, the transformer protection method is proposed.
主要讨论了励磁涌流的产生和其对变压器的影响。
This paper discusses production of excitation surge and the excitation surge effects on a transformer.
励磁涌流识别一直是电力变压器差动保护中比较关注的问题。
Inrush identification is always a key problem in power transformer current differential protection.
建立了一个比较合理且精确的变压器有载合闸的非线性数学模型，铁芯的励磁特性采用了多值磁滞特性。
A reasonable nonlinear model for transformer switch-in with load was proposed in this paper and multivalued hysteresis characteristic was adopted to be the excitation characteristic of the core.
在变压器励磁特性的BP模型基础上，提出了一种修正的BP模型，并推导了相应的算法。
Based on the BP (back propagation) model for excitation characteristics of transformer, a modified BP model is presented and the corresponding algorithm is also deduced.
由于变压器励磁涌流的存在，使得变压器差动保护有别于其他主设备及线路的差动保护。
It is the existent of magnetizing inrush current in transformer that differs transformer differential protection from differential protection of other main equipments and transmission lines.
变压器差动保护的关键问题是判别变压器差动电流是励磁涌流还是故障电流。
It is essential to distinguish excitation inrush from fault current in transformer differential protection.
文中认为当在变压器基波磁通中加入某一幅值的三次谐波磁通后，能显著地降低铁耗和励磁电流。
The study shows that the third-harmonic flux with a certain value added to the fundamental flux can obviously reduce both core loss and excitation current.
本文提出了一种基于磁通轨迹特征的变压器励磁涌流识别方法。
In this paper, a new method of identifying magnetizing inrush currents based on features of flux locus is presented.
对于电力变压器的对称励磁涌流，目前还是一个棘手的问题。
The symmetric inrush of power transformer is a complex problem recently.
第六章研究了两种鉴别变压器励磁涌流的新方法。
In chapter six, two novel methods of distinguishing magnetizing inrush current have been studied.
因此，正确识别励磁涌流是保证变压器差动保护可靠运行的关键。
So distinguishing between magnetizing inrush current and fault current correctly is the key to ensure transformer differential relay to operate credibly.
目前应用于实际的励磁涌流识别方法均不能很好地满足现代大型电力变压器保护的要求。
Inrush current identification methods currently being used, can't very well meet the requirements of modern large power transformer protection.
本文分析了变压器的励磁涌流现象以及变压器差动保护还存在的理论缺陷。
After analyzing the phenomenon of magnetizing inrush current and theory limitations of differential protection.
提出了单相变压器副绕组全励磁控制系统。
Come up with a single phase transformer full excitation system with secondly winding.
浅析浅析了目前区分变压器励磁涌流和故障电流的多种原理及存在的不足，提出了利用模糊识别原理来识别变压器励磁涌流的策略。
The paper analyses many theory of the current distinction between transformer inrush current and fault current and their problems and puts forward a method which is using the fuzzy recognition theory.
浅析浅析了目前区分变压器励磁涌流和故障电流的多种原理及存在的不足，提出了利用模糊识别原理来识别变压器励磁涌流的策略。
The paper analyses many theory of the current distinction between transformer inrush current and fault current and their problems and puts forward a method which is using the fuzzy recognition theory.
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