零值電流 的英文怎麼說

中文拼音 [língzhídiànliú]
零值電流 英文
current-zero
  • 零 : Ⅰ數詞1 （零數） zero2 （數的空位） zero sign （0）; nought 3 （表示沒有數量;無） nil; nought 4 （...
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 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...
  • 電流 : current; galvanic current; electric current; electricity; current flow電流保護裝置 current protec...
  1. The development of a visual short circuit software under ptcad2000 is presented in this paper, as well as the system structure, the definition of the data structure, the interface to ptcad2000, the conversion of the original wiring diagram of power network to calculable power network, the implement of three sequence network, the implement of impendence matrix and admittance matrix of power network considering the zero sequence mutual inductances among lines, and the implement of short circuit calculation by using computer

    本文介紹了在ptcad2000平臺下短路電流可視化計算軟體的開發。介紹了軟體的系統結構、數據結構定義、與ptcad2000平臺的介面、電力系統原始接線圖轉成等值可計算網路、序網的生成、考慮零序互感線路阻抗時電網導納矩陣和阻抗矩陣的生成，以及故障點短路電流計算的計算機實現。
  2. 1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %

    從功率單向流動角度出發，提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載，移相全橋具有超前橋臂零電壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。
  3. It includes four criterions of locating fault point ? “ transient zero sequence current amplitude law ”, “ stable base wave zero sequence current phase law ”, “ stable seventh harmonic zero sequence current phase law ” and “ s injection law ”. pointing out how the law locate the fault point to minimal fault section by applying these criterions gradually. the law will not only make up the blemishes existing in current methods for single - phase fault location in small current grounding system, but also locate the fault point to minimal fault isolating unit on fault line

    該方法通過將所包含的四個定位判據- 「暫態零序電流幅值法」 、 「穩態基波零序電流方向法」 、 「穩態7次諧波零序電流方向法」和「 s信號注入法」 -進行有選擇地遞進使用，不僅有效彌補了目前已有小電流接地系統單相接地故障選線的缺陷，更將故障定位在故障線路最小故障區段。
  4. The protector makes the over - current value, zero - phase - sequence component, negative - phase - sequence and so on as protection criterions, in protection theory ; it makes atmel 8 - bit microprocessor at89c55wd as the core, with which the lattice lcd is linked, in hardware

    該保護裝置在保護理論上，以檢測過電流幅值、零序電流為判據；在硬體實現上，以atmel單片機at89c55為核心，外接圖形點陣式液晶顯示器、觸摸式按鍵等外設。
  5. 2. the pre - flashover phenomena of alumina insulators in vacuum have been investigated. according to the experimental results, a reversed pre - flashover current was observed repetitively, which often occurs at the tail of pulse voltage close to zero ( sometimes after the applied pulse voltage )

    首次發現了大量的、重復性的反向預閃絡現象，即在沖擊電壓波尾附近電壓幅值已經接近零、甚至在沖擊電壓作用完后（已沒有電壓）的情況下仍然存在試樣表面發光現象，同時伴有反向的電流脈沖。
  6. So the line which the one - phase ground fault take place can be discriminated by these

    因此可以利用雙回線路中的零序電流相位差值的變化趨勢來識別故障線路。
  7. Among them, phase shifted ( ps ) full bridge ( fb ) zero - voltage - switched ( zvs ) pulse - width - modulated ( pwm ) dc / dc converter has strong competitive power in big power capacity fields. but it has some limitations such as smaller load range with zvs and larger circulation energy. the ps - fb - zvs - pwm dc / dc converter with a saturable inductor utilizes saturable inductor s critical saturable current characteristic and storage energy, to enlarge load range with zvs and improve output efficiency under light load

    其中，移相控制零電壓開關脈寬調制dc / dc全橋變換器在大容量領域很有競爭力，但它具有實現零電壓開關負載范圍小，循環能量大等限制，帶飽和電感的移相控制零電壓開關全橋變換器利用飽和電感的臨界飽和電流特性及儲能，來擴大零電壓開關（ zvs ）的負載范圍，提高輕載時的輸出效率，具有非常重要的研究價值。
  8. The results show that the ionosphere - weighted model or the tropospheric estimation, integrated with the partly - weigthed least squares, can improve, the success rate and the reliability of ambiguity resolution ; however, if the ionospheric delay or the tropospheric delay, which is modeled on random walk process or first - order gauss - markov process, is estimated with the kalman filter, it will reduce the success rate and the reliability of ambiguity resolution

    將電離層延遲作為零均值的隨機遊走過程（電離層加權模型） ，將對流層延遲作為靜態參數，採用非遞推形式的加權最小二乘法來估計，可以提高模糊度解算的成功率和可靠性。
  9. Judging by the different magnitude and direction of the wavelet packet coefficient modular maximum, we can select the single phase - to - earth line. the method using wavelet singularity detection theory to extract the fault time is discussed. a fault distance measurement algorithm combining wavelet analysis used for separating the character from the transient fault signal with artificial neural networks used for the nonlinear approximation from the transient character to fault distance is presented

    論文提出利用各個出線零序電流在頻帶上小波包系數模極大值的方向和大小的不同來實現故障選線，討論了利用小波分析的奇異性來判斷故障啟動時刻，提出將小波分析和人工神經網路結合，利用人工神經網路的非線性逼近能力，實現故障暫態量到故障距離的非線性映射，完成測距。
  10. Compare to the operation under the dcm mode, the power switches of the inverter under the ccm mode has lower peak current and rms current, so the efficiency can be improved. as the synchronous rectification strategy can reduce the conduction losses of the rectifier, and also due to the zvs realization of all synchronous rectifiers, the

    採用非互補導通控制，在ccm模式下由於功率管電流峰值和有效值的減小，逆變器變換效率較dcm模式下有所提高;另外， ccm模式下，反激逆變器採用同步整流控制，減小了整流二極體的導通壓降，並且電路中同步整流管可實現零電壓開通。
  11. The calculation to the eddy current on the contact surface and axial magnetic field of contact surface and center surface of contact gap are carried out while the current is at zero. after the iron core of ring type is put in, the eddy current on the contact surface will be increased, the axial magnetic field that the eddy current creates will be also increased

    對電流過零時觸頭表面的渦流和觸頭表面及觸頭間隙中心平面上的縱向磁場進行了計算，加入圓環型鐵芯后觸頭表面的渦流增大，渦流產生的縱向磁場增大，在鐵芯中開槽后渦流的平均水平降低，縱向磁場平均值降低。
  12. The rapid and reversible change between fluid and solid enables erf potential applications in mechatronic devices, cars and general machines. the transmission ability of a self - made cylinder coupling with zeolite - based erf was investigated, the torque transmission of the coupling in wide ranges of driving speed and electric field was measured. the relationship between the transmission torque, the zero field viscosity of erf and shear yield stress of erf under different electric fields was obtained and compared with theoretical prediction

    本文用沸石和硅油配製的電流變液，在自製圓筒式聯軸器上研究了在一定的速度范圍和有無電場作用條件下測量了其扭矩傳遞能力，獲得了傳遞扭矩與零電場電流變液粘度以及電場中電流變液的剪切屈服應力之間的關系，並與理論值進行了比較。
  13. Judging by the different magnitude and direction of the wavelet packet coefficient modular maximum, we can select the single phase - to - earth line

    利用各個出線零序電流在能量最大頻帶上小波包系數模值的大小和方向的不同來實現故障選線。
  14. Whereas if the contacts are in series with the alternating circuit, due to the passing zero property of voltage, we must evaluate the condition of contacts according to voltage value

    但當觸頭接入交流電路中時，由於電壓有過零的特徵，所以要根據電壓有效值來判斷觸頭是打開還是閉合。
  15. Numerical computation of the dynamic variation of the arc have been completed in the process of before current zero, after current zero and approaching zero to simulate the arc dynamic variation during the interruption process for the high voltage sf6 circuit breaker

    對電流零前、過零期間以及零后的電弧動態變化進行數值求解，實現了高壓sf _ 6斷路器開斷過程電弧動態變化的模擬模擬。
  16. By study, we can know that when one - phase ground fault happens on the line, more far the fault location is from where relays place, more less is the difference of the two zero sequence currents, while hen one - phase ground fault happens on the other line, more far the fault location is from where relays place, more is the difference of the two zero sequence currents

    研究表明，當本回線路發生單相接地短路時，在通過公式計算得出的一特定值為正時，離保護安裝處越遠，本回線路零序電流與非故障線路零序電流相位差值越小；當另一回線發生單相接地短路時，離保護安裝處越遠，本回線路零序電流與故障線路零序電流相位差值越大，該值為負時則反之。
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