transmission-line current 中文意思是什麼

transmission-line current 解釋
傳輸線電流
  • transmission : n 遞送；傳遞；傳達；傳染；移轉；【機械工程】傳動；傳遞；變速器；聯動機件；【無線電】傳送；發射；...
  • line : n 1 線；繩索；釣絲；測深度用繩，捲尺。 a fishing line 釣魚線。 be clever with rod and line 會釣魚...
  • current : adj. 1. 通用的，流行的。2. 現在的，現時的，當時的。3. 流暢的；草寫的。n. 1. 水流；氣流；電流。2. 思潮，潮流；趨勢，傾向。3. 進行，過程。
  1. In this thesis, the author analyses the deficiency in detecting and controlling function of the computer detecting and controlling system utilized in present transforming station. the strategy of design of software on operation and direction of 5 00kv transformer station is presented. it points out that we can deduce the mathematic analytical formula using the current, voltage and power of two terminals of transmission line as input. on this basis, we do realtime calculation of 500kv transmission line ' s parameter. we can also deduce the linear analytical formula of three - winding autotransformer ' s resistence using its current, voltage and power as input. the corresponding software is programmed on this basis

    論文提出以輸電線路本端和對端電流、電壓、功率作為輸入量，導出了超高壓長線的波阻抗和傳播常數的數學解析式，在此基礎上進行了500kv輸電線路實時參數計算；提出以三繞組自耦變壓器的電流、電壓、功率為輸入量，導出了自耦變壓器繞組的電阻、電抗的線性解析式並進而對變壓器的實時參數進行計算；在此基礎上編制了相應的軟體。
  2. The safety of transmission line plays a important role in power system safety it is not only the requirement of ensure supply power reliability, but also the necessary precondition of enhance power system stabilization, to remove faulty line quickly and accurately, also keep non - faulty line continuous work when some transmission line faults current differential protection is a kind of simple, reliable and good - selective protection manner to any variety of transmission lines, power system development needs current differential protection apply to transmission lines, moreover the advancement of electric and communication technology enable current differential protection apply to transmission lines firstly, the paper discusses, analyses the research and application transmission line protection in detail, compare the principle and realistic presupposition of general line pilot protections secondly, because conventional current vector differential protection are influenced easily by load current and transitional resistance, in order to at the same time quicken protection act, the principle and criterion include work characteristic of differential protect based on fault component sampled values are studied, results shows that differential protect based on fault component sampled values excels general vector current differential protection in reliability, sensitivity and anti - saturation of current transformer in addition, synchronous current sampling methods at all terminals of line is analyzed and estimated lastly, the principle and criterion. also device design about current sampling values differential protection based on optical fiber communication, which apply to short transmission lines are concretely investigated,

    基於基爾霍夫定律的電流差動保護無論對於何種形式的輸電線路都是一種簡單、可靠、選擇性強的保護形式，電力系統的發展使得電流差動保護應用於線路保護成為需要，而電子、通信技術的發展使得電流差動保護應用於輸電線路成為可能。首先，本文對目前線路保護的研究和實際應用情況進行了討論和分析，比較了常用線路縱聯保護的實現原理和實現條件及優缺點。其次，針對常規相量電流差動保護易受正常負荷電流和故障過渡電阻影響的缺點，同時為加快差動保護的動作速度，對基於故障分量瞬時采樣值電流差動保護的原理、判據、動作特性等作了討論和分析，結果表明基於故障分量瞬時采樣值電流差動保護在可靠性、靈敏度、抗電流互感器飽和方面明顯優于常規相量電流差動保護，對電流差動保護各端的同步采樣方法和數據通信也進行了分析和評價。
  3. For high stability of the system, with the realization of hardware of the system, the second part of this paper starts from the transmission line theory, and studies the signal integrity problem of high - speed circuit system in light current. the causes of these signal integrity problems, such as signal delay, reflection, crosstalk, ground bounce noises and etc. are analyzed in theory. combined with actual design, key points of design and standard design flow of general high - speed, high - precision printed circuit board are summarized, which has been applied in actual system, and good effect has been achieved

    為使系統具有較高的穩定性，本文第二部分結合該處理器的硬體實現，從傳輸線理論出發，研究了弱電情況下高速電路印刷電路板中的信號完整性問題；從理論上分析了延遲、反射、串擾以及地彈噪聲等信號完整性問題產生的原因；結合實際設計，總結了一般高速、高精度印刷電路板的設計要點和標準設計流程，並在實際系統中獲得了應用，取得了很好的效果。
  4. The thesis is focus on the research of the optical - fiber differential current protection that can adapt to the rapidly changing power grid. it mainly contains the following four parts : ( 1 ) theoretical analysis of some operation criterions and some factors that influence the operation of the differential protection. ( 2 ) simulation of a 500kv transmission line using emtp software

    其主要內容是： （ 1 ）對影響差動保護靈敏度的各種因素和不同的電流差動保護判據進行了理論分析； （ 2 ）用emtp模擬軟體對差動判據進行了數據模擬，並用matlab對輸出結果進行了詳細的可視化分析； （ 3 ）分析、比較了國內外縱差保護的數據采樣同步方法； （ 4 ）對判據進行了實際的編程實現和動模模擬。
  5. For the severe limitation that the selectivity of transient current protection will lose when the fault with small resistance or without resistance takes place at the end of transmission line, the basic reason for the selectivity loss of transient current protection was investigated

    摘要針對保護出口處發生金屬性或小電阻短路故障時，暫態電流保護完全失去選擇性的嚴重缺陷，利用時域分析方法，進行了詳細的故障暫態分析和模擬研究。
  6. Application of high - voltage explosion fuses is very abroad. in addition to protecting the electrical equipment by melting itself, disjunction or close of its tube can also be manipulated by a high - voltage insulative stick under some circumstance, for example, to switch on or off no - load overhead transmission line, no - load transformer and little burden current

    跌落式高壓熔斷器的應用極為廣泛，不僅能保護電氣裝置，在一定條件下還能直接用高壓絕緣鉤棒來操作熔管的分合，以斷開和接通空載的架空線路、小容量空載變壓器和小負荷電流。
  7. 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。
  8. Data synchronization for current differential protection based on optical fiber channel for ehv amp; uhv long transmission line

    特高壓長線路光纖縱差保護數據同步
  9. Data synchronization for current differential protection based on optical fiber channel for ehv amp; amp; uhv long transmission line

    特高壓長線路光纖縱差保護數據同步
  10. On the basis of extensive reading and research of theory of the wavelet, it is presented a practical method based on odd theory of wavelet analysis to remove the white noises from transient fault current traveling waves of high voltage transmission line via multi - size analysis of wavelet

    本文在廣泛閱讀和深入研究小波理論的基礎上，論文提出了一種基於小波分析的奇異性理論對通過小波多尺度變換的高壓輸電線路故障電流暫態行波信號進行白噪聲濾除的實用方法。
  11. The contents are using fault locating algorithm based on measurement impedance to determine a fault zone of transmission line, then use wavelet transform fault locating algorithm based on current traveling wave to fix the fault position. in order to ensure both results are valid, gps is used to synchronize their hardware. 2

    其主要內容是：利用所記錄的工頻故障信息和阻抗法粗略計算故障位置，再利用所記錄的暫態行波電流精確定位故障點，二者通過gps時間同步單元進行時間同步，從根本上解決輸電線路故障測距問題。
  12. Based on the current helicopter operation at home and abroad on transmission line and its technical development trend, the paper has carried on research and demonstration on feasibility to apply helicopter in cruising inspection of yang - huai 500kv transmission line from various aspects as its significance, necessity, selection of operating management mode and technical working plan as well as its rationalization economically etc. applying helicopter to operate on power transmission has been tendency of the world power industry. on using helicopter to cruise, inspect and maintain the yang - huai 500kv transmission line, the first objective is to insist on flying safety. two steps should be taken seperately for short term and long term objective. first, to rent helicopters and then, to buy them

    採用直升機進行電力作業已經成為世界電力工業的潮流，應用直升機巡視和維護500千伏陽淮線，應堅持把安全飛行作為首要目標，宜分近期和遠期兩個目標分階段實施，先租機，再購機；直升機的選型，主要從安全性和經濟性兩方面考慮，在起步階段租賃bo - 105c直升機；要根據作業項目和方法選擇機載儀器設備；用直升機進行輸電線路巡檢，能極大地提高勞動生產率，具有明顯的經濟效益，並將提高我國直升機運用水平，促進我國通用航空事業的發展，從而帶動相關行業的發展。
  13. Obtained by emtp program and the egm, this paper studies on lightning protection performance on 500kv double circuit transmission line the distributed parameter model of tower is built when analyzing the back stroking lightning protection performance for double circuit line, it can truly reflect the spreading course of lightning current on the tower, furthermore, considering the randomness of working voltage ' s phase when lightning strokes the top tower and supposing the probability of lightning appearing arbitrary phase in a cycle of ac is equal, this paper brings forward the statistical method to calculate the rate of back stroking on double circuit line

    本文利用emtp程序、擊距法對500kv同桿雙回線路的耐雷性能進行了研究。在分析同桿雙回線路的反擊耐雷性能時，建立了桿塔的分佈參數計算模型，此模型可以真實地反映雷電流在桿塔上的傳播過程。並針對雷擊塔頂時，導線運行電壓相位角的隨機性，本文假定雷擊出現于交流一周期的任一角度區間內的概率相等，提出了利用統計法計算同桿雙回線路的反擊跳閘率。
  14. As we saw in figure 11. 7, when an hf signal flows in a pc track running over a ground plane the arrangement functions as a microstrip transmission line and the majority of the return current flows in the ground plane underneath the line

    如圖11 . 7 ，高頻信號伴行地線傳輸時，可以將其視為「微帶線」 ，這時大部分返回電流都會從信號線下方的地線流過。
  15. The reliability of hv / ehv transmission line protection is important to the security of the power system. this thesis is devoted in the study of the transient current protection for hv / ehv transmission line

    探索新的保護原理和方法，以提高輸電線路保護的性能，是繼電保護研究領域中的一個重要課題。
  16. According to the characteristic of subway power alternating current transmission line, a new synchronous method based on reference zero point of the wave shape of voltage was proposed. the method is suitable to short distance line such as the subway power alternating current transmission line

    根據地鐵電力交流聯絡線的特點，作者提出了一種適合於短距離線路保護的參考電壓零點的同步演算法，並對該演算法的優缺點進行了詳細的分析與模擬。
  17. Comparision spectrum and spatial distribution of pulse current on a transmission line and it ' s near and far field radiation pattern

    傳輸線線上脈波電流之頻譜與分佈及其各頻率成份之輻射遠近場型之差異。
  18. The time harmonic voltage and current wave propagation along a transmission line can readily be transferred from frequency domain voltage and current phasor distribution along the line

    由傳輸線上電壓及電流沿線分佈之頻域相量，可轉換為傳輸線上各頻率成份弦波電壓及電流沿線之時域傳播。
  19. The sinusoidal voltage and current distribution on the line of each frequency component is obtained by the phasor equation for the transmission line and the source and load impedances

    將傳輸線上不同位置電壓及電流之頻譜以快速富氏反轉換即得傳輸線上不同位置之近似電壓及電流脈波。
  20. The radiation pattern in the near and far field of each frequency component of the spectrum of current pulse on a transmission line

    傳輸線上脈波電流頻譜中各頻率成份在遠近場區中場型之比較。
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