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磁保护
相关语句
  excitation protection
     Research on Technology of Loss of Excitation Protection for Generator
     微机发电机失磁保护技术的研究
短句来源
     Research on Simulation and Setting Calculation of Partial or Total Loss of Excitation Protection for Large Generator
     大型发电机低励失磁保护仿真和整定的研究
短句来源
     ANALYSIS OF LOSS OF EXCITATION PROTECTION WITH ANALOG ELECTROMOTIVE FORCE
     比拟电势失磁保护的分析
短句来源
     The scheme synthetically applies several criteria about the protection of loss of excitation,improves the traditional working characteristics of static limit impedance circle,and emphasizes the action of rotator,which contributes to the reliability of loss of excitation protection.
     本方案综合运用了失磁保护中几种常用的主判据 ,对传统的静稳极限阻抗圆动作特性进行了改进 ,并突出了转子判据的作用 ,从而提高了失磁保护的可靠性。
短句来源
     Among all types of protection for generator, loss of excitation protection is a subjectcalling for immediate study.
     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。
短句来源
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  magnetic protection
     Solving and Analysing of Generator's Error Operation obout Losing Magnetic Protection
     发电机失磁保护多次误动作的分析与处理
短句来源
  “磁保护”译为未确定词的双语例句
     Analysis on Magnet-loss Protection of ARAS2741B Digital Generator
     ARAS2741B数字式发电机失磁保护原理分析
短句来源
     Discussion once and again for system criterion (U_(3φ)<)in loss of field protection
     失磁保护中系统判据(U_(3φ)<)的再议
短句来源
     Discussion on 300 MW Generator Magnetism Loss and Its Protection
     300MW汽轮发电机失磁及失磁保护的探讨
短句来源
     Study on New Scheme of Microcomputer - Based Field Loss Protection for Generator
     微机发电机失磁保护新方案的研究
短句来源
     Field-loss Protection of WFBZ-01computer-based Generation in 300MW Generation
     WFBZ-01型微机发电机失磁保护在300MW发电机中的应用
短句来源
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  excitation protection
Excitation protection devices must therefore coordinate with the control devices not only in pickup levels, but also in time delays.
      
Other considerations, such as steadystate stability limits and Loss of Excitation Protection can also limit underexcited generator operation.
      
  magnetic protection
Magnetic protection and granular flows should also be kept in play.
      
Setting the magnets inside the rotor improves the mechanical strength and magnetic protection.
      


This paper studies the impedance characteristics seen by loss-of-excitation protection during out-of-step after losing field of a generator as well as the impedance locus when slip frequency varies .Physical concepts are viewed comprehensively .The results are helpful to behaviour analysis and calculation of generator loss-of-excitation protection.

本文研讨了同步发电机在失磁后异步运行状态下失磁保护测量阻抗的特性以及转差变化时该阻抗变化的轨迹,并从物理概念上进行了分析。文中的结果有助于了解失磁后的物理过程及失磁保护的分析与整定计算。

This paper mainly analyses and demonstrates an accurate method of setting calculation on low excitation out-of-step protection, consisting of stator criterion and rotor criterion. It introduces the application of electronic computer to setting calculation on low excitation out-of-step protection and presents the new method of determining the setting value of low excitation out-of-step protection by consulting curves.

本文主要分析和论证了以静态稳定极限为主要判据(定子判据)和转子低电压闭锁(转子判据)构成的低励磁失步保护的准确的整定计算方法。在对转子判据的分析中,着重论证了水轮发电机以不同的有功功率失磁达临界失步时的同步电势极限值E_(di)的计算公式;利用该公式,提出了转子低电压继电器新的动作条件,作为研制新的转子判据电路继电器的理论基础,从而进一步完善现有失磁保护的性能。

In this Paper, the power swing equation for the loss-of-field of a single alternator connected to an infinite busbar is derived. The transient electrical parameters in loss-of-field process are calculated by a computer. Then the critical conditions of alternator operation in this transient process are analyzed.The results of calculation and analysis indicate that the viewpoint of static stability is not suitable for analyzing loss-of-field failure. The stability analysis of loss-of-field in the paper presents...

In this Paper, the power swing equation for the loss-of-field of a single alternator connected to an infinite busbar is derived. The transient electrical parameters in loss-of-field process are calculated by a computer. Then the critical conditions of alternator operation in this transient process are analyzed.The results of calculation and analysis indicate that the viewpoint of static stability is not suitable for analyzing loss-of-field failure. The stability analysis of loss-of-field in the paper presents a new tripping criterion, δ=180°dynamic stability craterion and a new loss-of-field protection scheme.

本文以派克方程为基础,就单机——无限大系统这一普遍情况,从理论上推导了同步发电机失磁行为的振荡方程式,通过数字计算机对失磁暂态过程的电气量进行了计算,并着重对发电机运行状态的临界点进行了分析。分析与计算结果表明,目前在失磁分析中,较广泛应用的静态稳定的观点与结论,在理论上是不妥当的,其分析也不符合发电机运行的实际。本文还通过失磁的稳定分析,提出了失磁保护新的跳闸判据——δ=180°的动态稳定判据,以及由动稳判据构成的两级定子判据,全定子型的失磁保护方案。

 
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