three-phase fault 中文意思是什麼

three-phase fault 解釋
三相故障
  • three : n. 1. 三個人[東西]。2. 三歲，三時。3. 【板球】3字型。
  • phase : n 1 形勢，局面，狀態；階級。2 方面，側面。3 【天文學】（月等的）變相，盈虧；【物、天】相，周相，...
  • fault : n 1 過失，過錯；罪過，責任。2 缺點，缺陷，瑕疵。3 （獵狗的）失去嗅跡。4 【電學】故障，誤差；漏電...
  1. They are paleozoic ~ early mesozoic - fold deformation and the appearance of reversed fault ; mesozoic - the beginning of graben faulting - block period ; early cenozoic - the phase of broke - the forming of block hill ; late cenozoic - the phase of segging - the forming of buried hill. we mark off five kinds of buried hill belts. they include three different kinds of trap on the basis of the cause of trap formation

    本次研究在重新認識濟陽坳陷區域構造背景的基礎上，將濟陽坳陷古生界潛山的形成過程分為四個階段，即古生代早中生代?穩定沉降?隆升?輕微褶皺變形及逆斷層發育階段、中生代?初步斷陷階段?塊斷期、新生代早期?斷拗階段?塊斷潛山形成期以及新生代晚期?坳陷階段?潛山定型期。
  2. In the second method, wavelet transform is combined with modal transform, and transient travelling - wave signal is used. after three phase signals are decomposed into their modal components, the wavelet transform coefficient of ground mode can be used to identify approximate position of fault, and the wavelet transform coefficient of aerial mode is used for identifying arrival time of traveling - wave

    第二種方法將小波變換與模式變換理論結合起來，採用的是暫態行波信號，首先將三相信號轉換成模式分量，零模分量的小波變換系數用於判別故障的大致位置，然後利用線模分量的小波變換系數來確定行波到達時間。
  3. The fault reasons of a phase c 378mva transformer in one group of main transformers are analyzed by three - ratio method. the improvement measure is presented

    摘要利用三比值法分析了一臺主變c相378mva單相變壓器故障的原因，提出了改進措施。
  4. Then the method of fault diagnosis in three - phase thyristor converter bridge based on spectrum analysis is discussed. and the fault model was simulated and analyzed again in the method, also fault diagnosis criterion is gained in the condition

    接著，闡述了基於頻譜分析的三相全控整流橋故障診斷方法，並應用該方法對故障模型重新進行了模擬、分析，得出了相應的故障診斷判據。
  5. The main job of this research is : ( 1 ) analyze the operation situation of power system during faults ; pay attention to the traveling wave on the three - phase transmission line ; study the equation of voltage on three - phase transmission line with impedance capacitance coupling between phases ; contact the voltage on any point with the fault voltage, study the singularity of the voltage signal in fault point, and make it to be the base of the new fault detection method ; ( 2 ) apply the singularity detection theory based on wavelet analysis to the power system faults detection, give a complementary criterion to current fault detection criterion, study how to select the basic wavelet, how to filter noise, how to detect the singular point or fault point, and finally give a total solution. the simulations prove it to be a quick, correct and effective fault detection method

    本文的主要工作有： （ 1 ）分析電力系統在發生故障時的運行狀態，尤其對三相傳輸線上的故障行波進行了分析和研究，推導了考慮相間耦合的三相傳輸線電壓方程，並將傳輸線上任一點的電壓與故障點電壓建立起聯系，得出了傳輸線上電壓信號在故障點處的奇異性，並以此作為構造新的故障檢測演算法的理論基礎； （ 2 ）將基於小波變換的信號奇異性檢測理論運用於電力系統故障檢測中，針對目前相關研究的不足，提出了電力系統故障檢測判據的補充判據，通過對基本小波的選擇、除噪措施、信號奇異點也即故障點的檢測方法所作的分析，給出了一個可行的解決方案；模擬研究表明：這是一個快速、準確、有效的故障檢測演算法。
  6. After that, the author discusses a novel solid states limiting technology and provides a single - phase solid states bridge current limiter and a main circuit topology of three - phase fault current limiter. it can be found that the new type of three - phase solid states bridge current limiter can handle the fault conditions more flexibly. it can not only remove the fault circuit, but also control the value of stable fault current to cooperate with the existing line three - segment relay

    繼而，介紹了一種新型固態限流技術，給出了單相、三相限流器的主電路拓撲，分析了其基本工作原理和控制方式，指出以全控橋結構為基礎的變壓器耦合橋式限流器能夠更加靈活地處理電力系統的各種短路故障，及時地限制短路電流，並與現有的線路三段保護相配合，還可根據需要實現及時切除故障電路，在故障恢復時軟重合閘。
  7. However, some unique geographical characters, such as fire grounding, bamboo grounding and treetop grounding, can cause single phase high - impedance grounding fault frequently. since the voltage drops down very little and the voltage among three phases keeps symmetric, this fault increases the difficulty of the check on this fault

    然而，由火焰接地、毛竹接地或樹梢接地等原因引起的單相高阻接地故障，由於電壓降小、三相線間電壓依然幾乎對稱，從而增加了高阻接地檢測的難度。
  8. For phase - to - phase fault, it trips three phases and recloses three phases ( checking synchronization and no - votage ) ; when reclosing on permanent fault, it trips three phases

    使開關相間故障跳三相，重合三相（檢定同期或無壓） ，重合於永久性故障跳三相。
  9. In theory analysis, the voltage waveforms of the 12 - pulse waveform controlled rectifier circuit and three - phase thyristor converter under fault and normal condition are analyzed and researched in detail, all the faults states are summarized and classified according to the aberrant voltage waveforms

    在理論分析方面，本文對三相橋式整流電路、 12脈波可控整流電路等大功率電力電子裝置整流電路在正常運行及故障狀態下的整流電壓波形進行了詳細分析和研究，按照電壓波形對故障狀態進行了總結和歸類。
  10. Overheating fault is the trickest in all usual faults of three - phase induction motor. the article analysed the cause on overheating fault hum five aspects, and expounded repaired ways

    摘要在三相異步電動機經常出現的各種故障中， 「過熱故障」最為棘手。本文著重從五個方面分析了產生過熱故障的原因，並闡述了修復方法。
  11. Three - phase full - bridge controlled rectifier ' s fault monitoring system based on dsp

    的三相橋式全控整流電路故障監視系統
  12. Viper solid dielectric, three phase reclosers fault interrupting through 38kv, 800a, 12. 5ka symmetrical interrupting

    為額定電壓38kv以下， 800a持續電流， 16ka的系統提供三相過電流保護
  13. Through research on principle and approach, this paper puts forward three new methods in power cable fault location. the first method is based on wavelet reconstruction, and the measured signal which is the difference between the faulty and sound phase current under the high voltage pulse excitation, is transformed using wavelet, and the high frequency component is reconstructed at single scale

    基於小波重構的電纜故障測距方法採用脈沖電源作用下故障相與健全相的電流差作為測量信號，利用小波變換對其作多尺度分解，然後對信號在高頻下進行單支重構。
  14. Aiming at the unsymmetrical three phase voltages from inverter after a failure, the dissertation get the relationship among the positive sequence ( ps ), negative sequence ( ns ) and the instantaneous symmetrical component of the ps, this build the foundation to detect the fault and to get the fault feature

    針對逆變器故障后的電壓輸出的不對稱性，利用對稱分量法對逆變器輸出信號進行分析，獲得了逆變器輸出信號的數字信號模型，為變頻調速系統的故障檢測與故障特徵提取奠定了基礎。 3
  15. Firstly, a relevant algorithm is presented for locating single - line - to - ground ( slg ) fault in distribution networks, fault functions are reasoned out and analyzed for single - phase and three - phase distribution lines, and criterion measure, which are based on the frequency, phase and shape characteristics of the fault function spectrums, are also presented for locating slg faults

    首先論文對三相均勻換位線路的故障定位進行了公式推導和數值計算分析，並在頻域內對故障函數的頻譜曲線幅值、相角和頻率特性進行了分析，提出了相應的故障定位判據。
  16. G w viper solid dielectric, three phase reclosers combine the time proven reliability of electronically controlled, vacuum fault interrupters with the maintenance benefits of a solid dielectric insulated device

    乾式絕緣三相重合器結合了有長期運行經驗的可靠的電子控制裝置，維護方便的真空斷路器和乾式絕緣設備。
  17. Three phase sustained fault

    三相持續短路
  18. In the system, control unit accomplishes back - emf zero - crossing information reading and closed loop commutation. the system eliminates the pwm interferences and the commutating interferences by filtering with software algorithm. in order to make the bldc commutate exactly, the method of three - point estimation is used for phase locking in the system. the system also accomplishes several important objects, such as tmppt of photovoltaic arrays, unmanned supervision of the system, fault detection etc. the results of the experiment show that the device, which is made on the base of the principle above, can control the motor to complete the exact commutation

    系統以motorola單片機jl3為核心，完成了系統外圍硬體電路和控制軟體設計，實現了直流無刷電機反電勢過零檢測，利用軟體濾波的方式消除了pwm波干擾及換相干擾；採用三點預估演算法，進行相位鎖定，以完成直流無刷電機準確換相；同時實現了光伏陣列工作點的tmppt跟蹤、系統無人監控和故障檢測等功能。
  19. Then the paper gives an novel solid state fault current limiter. it provides the main circuit topologies of single - phase and three - phase fault current limiter, and explains the principle of this fcl detailedly

    然後提出了一種新型固態限流器，給出了單相、三相限流器的主電路拓撲，詳細說明了它的工作原理。
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