发电机失磁后的动态过程是比较复杂的机电过程，发电机组各个环节的结构和参数都将影响它的动态过程。
The electromechanical process of generator field loss is complicated and its dynamic process is affected by the structures and parameters of every component in the generation system.
根据失磁过程机端电压特性和励磁电压变化特性，提出了一种综合的、较为完备的计算机失磁保护方案。
According to the impedance characteristics of the generator and the characteristics of the change of excitation voltage, a relatively self - contained and integrated scheme is proposed.
针对大功率磁传动增压注水泵在使用过程中存在的永磁体高温失磁等问题，分析了磁力传动器损坏的主要故障原因。
In the course of running of high-power magnetic driven boosting water injection pump, the magnetism of the permanent magnet may vanish at high temperature.
发电机失磁是一种危险的异常运行方式。
The loss of excitation of generator is a kind of dangerous operation way.
本文介绍了国内现有的典型低励失磁保护判据，分析了现有判据存在的一些问题。
It introduces the domestic existing partial or total loss of excitation protection criterion, analyzed the problem of existing criterion.
在模拟发电机组上进行了失磁实验和仿真分析，实验结果验证了仿真结果的正确性。
The field loss test and simulative analysis are carried out on a simulative generation system and the experimental results verify the correctness of simulation results.
在发电机的各种保护中，发电机失磁保护是一个急待研究和完善的课题。
The generator field loss protection is a topic that should be studied urgently in various generator protections.
对于不同原理的发电机失磁保护误动进行了分析并提出了改进措施。
Lost the excitation protection regarding the different principle generator by mistake moves carries on analyzes and proposes the improvement measure.
应用神经网络识别变励磁电压判据的动作区，提出应用神经网络的发电机低励失磁保护方案。
Then the author uses a three-layer ANN to distinguish excitation-loss fault, and brings forward a scheme of excitation-loss protection using ANN for generator.
本文介绍了发电机“失磁”故障的现象、原因、处理及防范。
This article introduced phenomenon reason or deal with and keep a lookout of trouble by electric generator to "lose magnetism".
发电机低励失磁故障是一种严重的故障形式，低励失磁保护也是发电机保护的重点和难点。
For synchronous generator, loss of excitation is a serious fault and the corresponding protection often refuse to operate.
分析了微机ul P失磁继电器的准确动作方程及整定计算方法，弥补了某些文献的不妥或不足之处。
Accurate operation equation and setting calculation on microprocessor based UL-P loss of excitation relay are analyzed in this paper which has supplied a deficiency in some works or papers.
介绍了发电机失磁保护的现状以及常用的阻抗原理失磁保护方案。
The current situation of generator loss of excitation protection and the usual scheme of loss of excitation protection based on impedance principle are introduced.
稀土永磁材料的失磁现象制约了其在大型永磁电机中的应用。
The loss of excitation limits the use of Nd-Fe-B permanent magnetic materials in large permanent magnets.
分析了在最不利的情况下，失磁过电流对系统可靠性的影响。
What's more, in the worst situation, the over current in losing field having effect on the reliability is analysised clearly.
介绍ABB公司励磁系统低励限制的定值整定，分析北京热电分公司1号发电机进相运行时的动作情况以及ABB励磁系统低励限制与失磁保护之间的关系。
In this paper, the author introduced the fixed value setting of underexcited limitation in ABB excitation system. And also analyzed the condensive operation of No. 1 generating unit.
常用的保护环节有短路、过流、过载、过压、失压、弱磁、超速和极限保护等。
The commonly used protection link has the short circuit, the overflow, the overload, has pressed, loses presses, the weak magnetism, overspeed and the limit protection and so on.
本文对大型水轮发电机失励磁保护，在动模试验的基础上进行了理论分析；论证了机组在失励和其他特殊运行情况下的基本特性；
This paper, based on the dynamic experiments in the laboratory simulation model, gives a theoretical analysis on loss-of-excitation protection for large hydroelectric generators.
并找出了不同磁链轨迹间的平滑切换点，解决了切换时的电动机失步问题，提高了系统转速调节的动态性能。
Furthermore, different polygonal flux linkage locus's fluent switching point is also found, which overcomes the motor 'switching failure and improves the speed adjusting dynamic performance.
介绍了阳光公司1 0· 2 3事故情况，着重分析了主励磁机差动保护和发电机失磁保护的动作原因，并提出技术改造措。
It intraduces 10·23 accident in Yangguang power company, emphasize on cause of differential and magnetism loss protective action on main excitation machine and present measures of technical reform.
上述方法得到的结果可用于电机失磁在线检测和电机高性能控制中。
The outcome has already reached can apply to excitation losing online detecting and high performance control of electric engines.
文中还介绍了失磁保护的构成、出口逻辑以及配置方案。
This paper also introduced the constitution loss of excitation protection, the exportation logic as well as the disposition plan.
“发电厂并网运行安全性评价”要求验证低磁励限制与失磁保护的整定关系，在实际校核中，发现低磁励限制是在P-Q平面进行计算的，而阻抗型失磁保护是在R-X阻抗圆平面进行分析的。
Through check, it is found that minimum excitation limit is calculated in P-Q plane, while impedance type loss-of-field protection is analyzed in R-X plane.
“发电厂并网运行安全性评价”要求验证低磁励限制与失磁保护的整定关系，在实际校核中，发现低磁励限制是在P-Q平面进行计算的，而阻抗型失磁保护是在R-X阻抗圆平面进行分析的。
Through check, it is found that minimum excitation limit is calculated in P-Q plane, while impedance type loss-of-field protection is analyzed in R-X plane.
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