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虚拟三次谐波
相关语句
  virtual third harmonic
     Inthis paper, second harmonic brake, dead angle, waveform symmetry, waveformmatching and virtual third harmonic brake mothod are introduced and analysied,which are all based on different current.
     本文主要介绍了二次谐波制动原理、间断角原理、波形对称原理、波形比较法、虚拟三次谐波制动原理等几种基于电流量的识别励磁涌流的方法,并对每一种方法作了分析和评价。
短句来源
     VIRTUAL THIRD HARMONIC RESTRAINED TRANSFORMER DIFFERENTIAL PROTECTION PRINCIPLE AND PRACTICE
     虚拟三次谐波制动式变压器差动保护
短句来源
     STUDY ON THE SIMULATION OF TRANSFORMER DIFFERENTIAL PROTECTION BASED ON VIRTUAL THIRD HARMONIC THEORY
     虚拟三次谐波制动式变压器差动保护的仿真研究
短句来源
     A Research into Inrush Current Restraint of Transformer Differential Protection Based on Comparison of Virtual Third Harmonic
     虚拟三次谐波比较的变压器差动保护涌流制动方案
短句来源
     This approach uses the relative analysis to achieve the comparison of the Virtual Third Harmonic of differential current.
     原理是利用相关分析间接实现差动电流虚拟三次谐波比较 .
短句来源
更多       
  virtual 3 rd harmonic
     On this basis the transformer differential protection constituted by the combination of sampled valuedifferential criterion, virtual 3rd and 2nd harmonic restraintphasor differential criteria, fault component based virtual 3rd harmonic restraint phasor differential and sampled valuedifferential criteria can improve the protection performance to a great extent.
     由采样值差动判据、虚拟三次谐波制动及二次谐波制动相量差动判据、故障分量虚拟三次谐波制动相量差动和故障分量采样值差动等判据综合构成的变压器差动保护,能使变压器差动保护的性能得到较大提高。
短句来源
  “虚拟三次谐波”译为未确定词的双语例句
     A new restrained scheme for the transformer differential protection was brought forward by the authors in this paper.
     为了克服二次谐波制动变压器差动保护的动作速度满足不了大容量变压器要求的不足 ,提出了一种变压器差动保护的新制动原理———虚拟三次谐波制动原理 ,并介绍了这种方案的基本概念、构成原理、仿真分析及动态模拟试验中的一些技术问题。
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A new restrained scheme for the transformer differential protection was brought forward by the authors in this paper. In this paper, the basic concept, construction theory, simulation analysis, physical dynamic simulation test and application were introduced, including the conclusion.

为了克服二次谐波制动变压器差动保护的动作速度满足不了大容量变压器要求的不足 ,提出了一种变压器差动保护的新制动原理———虚拟三次谐波制动原理 ,并介绍了这种方案的基本概念、构成原理、仿真分析及动态模拟试验中的一些技术问题。仿真及动模试验证明 :该原理可有效地识别对称性励磁涌流 ;能有效地防止励磁涌流引起的保护误动 ;提高了保护动作的速度 ,能在 12ms左右发出跳闸指令

Aim ing at the transform er differential protection based on virtual third harmonic theory,this paper introduces concretely how to build the transformer sim ulation m odel using the ATP program .The detail sim ulation results applying the new theory in different conditions are obtained,which show the feasibility of the new theory and the selective scopes of protection setting.

针对虚拟三次谐波制动式变压器差动保护 ,具体阐述如何利用 ATP仿真程序建立适用于该新原理的变压器仿真模型 ;同时 ,详细给出了变压器在各种工况下运用此新原理所得到的仿真结果 ,以说明原理的可行性和保护整定值的选取范围。

According to the special main connection of Dajiang power plant of Gezhouba—united and expanded unit connection,and with the main transform protection as example;a double protection scheme for large capability HV transformer is brought forward.This scheme applies two different differential protection principles and their protective criteria:the common phasor differential protection restrained by second harmonic and the sampling differential protection restrained by virtual third harmonic.The former has high...

According to the special main connection of Dajiang power plant of Gezhouba—united and expanded unit connection,and with the main transform protection as example;a double protection scheme for large capability HV transformer is brought forward.This scheme applies two different differential protection principles and their protective criteria:the common phasor differential protection restrained by second harmonic and the sampling differential protection restrained by virtual third harmonic.The former has high sensitivity,but low action speed when transformer closing to fault;the latter can meet the requirement of “accelerated trip”when transformer closing to fault,but has a vague zone and may function improperly for slight inter turn SC of transformer.The two protection principles cooperate with each other for both sensitivity and speed.It is a practicable double protection scheme.

针对葛洲坝大江电厂特殊的主接线方式———联合扩大单元接线 ,以其主变压器保护配置为例 ,提出一种适用大容量高压变压器保护双重化配置方案。采用 2种不同的差动保护原理及对应的制动方案 :二次谐波制动的常规相量差动和虚拟三次谐波制动的采样值差动。前者灵敏度高 ,但在变压器空合于故障时 ,动作速度不快 ;后者存在动作模糊区的问题 ,在变压器发生小匝数轻微短路时可能不能保护 ,而在合于故障时可以满足“速动”的要求。 2种不同的保护原理相互配合 ,可同时兼顾动作速度和灵敏度 2个方面 ,是主变压器保护的一种可行的双重化方案

 
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