勵磁涌流 的英文怎麼說

中文拼音 [lìcíyǒngliú]
勵磁涌流 英文
excitation surge current
  • 勵 : Ⅰ動 （勸勉） encourage; exert oneself Ⅱ名詞（姓氏） a surname
  • 磁 : 名詞1. [物理學] （磁性; 能吸引鐵、鎳等的性質） magnetism 2. （瓷） porcelain; china
  • 涌 : 涌名詞[方言] （河汊, 多用於地名） a branch of a river
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  1. The fast discrimination between magnetizing in - rush current and fault current is a difficulty in transformer protection presently. to solve this problem, second harmonies restraint and dead angle are used widely in practical application

    勵磁涌流的快速鑒別仍然是當前變壓器保護面臨的一個難點，在實際應用中廣泛採用二次諧波制動原理和間斷角原理來鑒別勵磁涌流。
  2. At present, differential protection is often used as the main protection for traction transformers. however, the existing of certain factors, such as magnetizing inrush, over - excitation, ct saturation and mismatching of ct ratio, will result in that it is hard to distinguish state current and fault current, and differential protection misoperation or maloperation, then secure operation of electric railways system will be threatened

    目前，牽引變壓器通常採用差動保護作為主保護，但是在某些因數的影響下差動保護並不能準確的區分牽引變壓器內部故障或非內部故障，如故障電流與變壓器處于勵磁涌流、過勵磁， ct飽和及ct變比不匹配等情況下的狀態電流就很難準確的區分，可能造成保護誤動或拒動，從而危及整個鐵道電氣化系統的安全運行。
  3. How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay

    變壓器主保護選擇差動在原理上存在不足，帶來的問題就是如何準確鑒別勵磁涌流與內部故障，這也是目前變壓器保護的難點。
  4. According to the characteristics of inrush current a series of new approaches of discrimination inrush current by utilizing fuzzy set is presented. and then the algorithm of transformer protection is achieved based on 80c196 system

    通過研究勵磁涌流的特徵，提出了利用模糊識別原理來識別變壓器勵磁涌流，並基於80c196單片機系統編制了保護軟體。
  5. The paper analyses the principles of distinguishing internal faults current from inrush current and their defects at the present time on the basis of investigating widely the existing papers on identification of inrush current

    本文在廣泛閱讀國內外現有的關于變壓器勵磁涌流識別的文獻的基礎上，分析了目前區分變壓器勵磁涌流和故障電流的多種原理及存在的問題。
  6. In order to meet needs of reliability and speediness of power transformer protection, and to have protection blocking reliably in the presence of magnetizing inrush current, the wavelet transform is applied to the discrimination between inrush current and fault current

    本文把小波變換應用於勵磁涌流的鑒別，詳細探討了用小波變換來區分勵磁涌流和故障電流的具體方法，提出了兩種比較適用於工程實際的方法。
  7. Besed on the circuit, electromagnetism and electric power electronics theories, we have done some theory research on the harmonics induced by thyristor commutate circuits of ac - dc locomotive, surge electromagnetism process. we calculate the theory content of harmonics using the fourier arithmetic under thyristor commutate and surge electrmagnetism process

    論文根據電力機車類型的不同，運用電路、電磁場和電力電子學理論研究了交?直型電力機車相控整流時諧波的產生機理、勵磁涌流的電磁過程，並對晶閘管相控整流和勵磁涌流時的理論諧波含量進行了傅里葉分析。
  8. In order to improve the behavior of transformer protection that is incomplete at present in distinguishing magnetizing inrush current from fault current, the paper puts forward a kind of new principle of transformer differential protection after analyzing the characteristic of magnetizing inrush and active power consume of transformers. this protection uses differential protection based on positive sequence active power as a criterion to discriminate internal faults from magnetizing inrush, and ratio restraint differential current protection as a signal to touch off the protection

    針對當前電力系統中變壓器保護由於勵磁涌流鑒別理論不完善而導致的誤動率相對較高的問題，論文在分析了變壓器勵磁涌流特性和有功損耗的基礎上，提出了用變壓器正序有功功率差動作為區別勵磁涌流和故障電流的判據，並以成熟的比率制動差流保護作為內外部故障判據的變壓器主保護。
  9. This thesis chooses b spline wavelet that adapts to the analysis of power system signal, and uses the wavelet transformer to analyze the magnetizing inrush current and inner fault current. a transformer microcomputer protection was designed in this thesis, and in the base of intermission angle principle, a new criterion was established, which pierces through the traditional method with accurate measurement of intermission angle, but analyses the wave by wavelet transform. this criterion is lower in hardware, so it will be realized in the existing hardware

    本文選擇適合電力系統信號分析的b樣條函數作為母小波，對勵磁涌流和內部故障電流進行小波分析，並設計微機型變壓器保護基本配置，在以往間斷角原理鑒別勵磁涌流的基礎上，突破傳統精確測量勵磁涌流間斷角的方法，直接對信號小波變換后的波形進行分析，建立一個新的鑒別勵磁涌流判據，該判據對硬體要求不高，可以在現有一般硬體平臺上實現；並編寫以b樣條函數為母小波的小波變換判據演算法程序。
  10. The criterion that is based on nonlinear mode of transformers can better reflect the state of transformers that have been proved by academic analysis and empt emulation

    該勵磁涌流判據採用了變壓器非線性模型，能更好的反映變壓器的工作狀態，論文用理論分析和數字模擬作了詳細證明。
  11. The main achievements of the thesis are as follows : ( 1 ) kinds of techniques to detect magnetizing inrush of traction transformers are thoroughly investigated in this paper, and their limitation are indicated and corresponding improvement techniques are proposed. ( 2 ) in this paper, flux linkage equilibriun equations are used to build " ash - box " models of some traction transformers based on system identification, such as two - winding single - phase traction transformer, impedance - matching equilibriun traction transformer and scott traction transformer

    論文的主要內容有： （ 1 ）詳盡分析了現有的針對牽引變壓器勵磁涌流演算法的保護演算法，提出了每種演算法的局限性及其改進方法； （ 2 ）提出適用於鐵道電氣化系統中各種牽引變壓器對應的三?二相轉換規則，利用該規則可將對應量的轉換置於保護軟體中，從而可大大減輕在牽引變壓器兩端外部復雜的接線。
  12. The reliability of protection would be enhanced if magnetizing inrush is discriminated. so, this thesis analyses and compares some discriminating methods applied in practice or described in related literatures at present. on the basis of considering comprehensive factors, a method to discriminate between internal faults and magnetizing inrush based on wavelet analysis and dynamic architecture neural network is proposed

    若能將勵磁涌流識別出來，就能提高保護動作的可靠性，因此本文針對當前實際應用的和有關文獻中提到的一些識別方法進行了分析、比較，在綜合考慮多方面因素后，給出了一種基於小波與改進型動態結構神經網路的勵磁涌流識別方法。
  13. In view of this fact, a novel method based on identification of winding parameter is presented, which need not to distinguish magnetizing inrush. simulation results by using emtp and matlab demonstrate the feasibility and availability

    該方法能有效的區分牽引變壓器內部故障與外部故障、勵磁涌流等情況，用emtp及matlab進行模擬計算，驗證了該方法的可行性和有效性。
  14. The extending techniques such as vector transform ， excitation inrush current, ta saturation and so on are analyzed, which resolves the question that the traditional optical differential protection can not satisfy the request of line - transformer unit

    同時對光纖差動保護運用於線路變壓器組時涉及的矢量變換、勵磁涌流、 ta飽和等延伸技術進行了分析，解決了傳統的線路光纖差動保護不能滿足線路變壓器組保護的要求。
  15. In the course of settling new types of transformer microcomputer protection, it is still a key and difficult problem how to prevent protection miss - operating caused by magnetizing inrush when transformer suddenly is closed in no load

    在研究新型微機變壓器保護過程中，如何防止變壓器突然空載合閘時出現的勵磁涌流所造成的保護誤動作，仍然是最關鍵和最困難的問題。
  16. Magnetizing inrush current has obvious singularity, and wavelet transform has multi - scale and good time - frequency local characteristic, that it is particularly well adapted to extract the characteristic of signal ' s edge and peak value, and can check up the singularity well

    變壓器勵磁涌流具有明顯的奇異性，小波變換具有多尺度分析和良好時頻域局部化特性，適合提取信號邊緣和峰值突變的特徵，能夠很好的檢測信號奇異性。
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