differential current 中文意思是什麼

differential current 解釋
差動電流
  • differential : adj 1 差別的，區別的；特定的。2 【數學】微分的。3 【物、機】差動的，差速的，差示的。n 1 （鐵路不...
  • 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. Firstly, proem, it concise introduces the background ; secondly, it introduces the reform of the commission system and the dilemma of the securities companies in our country ; thirdly, it puts forward the idea of implementation of " optionally differential strategies " as the natural choice for the future development of the securities brokers in our country, through the analysis of the current competitive environment of the securities companies in our country and study on the alternatives of competitive strategies ; the forth, it describes how to practice " optionally differential strategies ", which including three aspect : the choice of the core competition ability, the measures for the implementation are brought forth, and the condition of practice the strategies ; the fifth, it " s the summary of the dissertation

    第一部分，簡介論文寫作背景；每二部分，介紹我國傭金制度改革以及改革后我國證券公司所面臨的困境；第三部分，通過對現階段我國證券公司競爭環境的分析，進行競爭戰略選擇研究，提出實施選擇性差別化戰略應成為我國證券商未來發展的必然選擇。第四部分，提出「選擇性差別化戰略」的實施措施，包括拓展業務領域、拓寬交易渠道及改革證券商管理模式三方面可操作的內容；第五部分，對全文作概括性的總結。
  2. The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly

    但是在母線區外發生短路故障（特別是故障電流含有大量非周期分量）時， ct會出現飽和現象， ct飽和后，不能正確地傳變一次側電流，從而使二次電流發生嚴重畸變，產生很大的差電流，這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題，近年來提出的在ct二次電流過零時的線性傳變區投入差動保護，避開ct飽和區，能對母線故障做出正確判斷。
  3. In this thesis, we demonstrate the study of si - based light emitting materials and its importance in si - based photonics integration. we discussed mainly the gain, differential gain, threshold current of si - based quantum - dot laser and the dependence of threshold current on temperature from discrete energy level of three - dimension confined quantum - dot and state density distribution of 5 - function

    本文闡述了si基光發射材料的研究進展及它在硅基光電子集成中的重要地位，從三維受限量子點的分立能級和函數狀的態密度分佈入手，著重討論了si基量子點激光器的增益、微分增益、閾值電流及閾值電流的溫度特性。
  4. For the leakage often occured on condenser brass pipe of hanchuan power plant, using differential inner insert detecting coil the on - line multi - frequency eddy current check technology effectively restrains interferance source signal from support board, etc, improves measuring sensitivity and the measuring result gets more reliable

    摘要針對漢川電廠凝汽器銅管在運行中多次發生泄漏，利用差分內插式檢測線圈，通過多頻渦流檢測技術對凝汽器進行渦流在役檢測，有效地抑制了支撐板等干擾源信號，提高了檢測靈敏度，使得檢測結果更可靠。
  5. Thus, to open or block it in current transformer linear or saturation sections, the bus differential protection can be realized

    實現了母差保護在ta飽和區內閉鎖，線性區內開放，從而避免了區外故障ta飽和時保護的誤動作。
  6. The bus differential protection based on instantaneous values of currents is the most useful scheme nowadays. but it is easy to be influenced by current transformer saturation and to make misoperation

    目前微機保護最常用的方法是電流瞬時值差動保護，這種方法受電流互感器（ ta ）飽和的影響而容易誤動。
  7. Unbalanced current generated in differential protection of main transformer and its countermeasure

    主變差動保護不平衡電流產生及應對措施
  8. Connection method includes single star and double star, relaying protection method includes open delta voltage protection, differential current protection, differential protection, neutral unbalance current protection etc

    接線方式有單星或雙星接線，繼電保護方式有開口三角電壓保護、差流保護、差壓保護、中性點不平衡電流保護等幾種形式。
  9. 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。
  10. 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。
  11. 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。
  12. Alternating - current linear variable differential transformer ac - aclvdt

    交流極譜儀
  13. In order to solve the existing ct saturation problem which is met in current differential principle, this paper bring forward the new method to discriminate ct ' s saturation based on bd wavelet transformation

    針對電流差動原理中遇到的ct飽和的問題，提出了基於bd小波變換識別ct飽和的新方法。
  14. This paper analyzes detailedly the principles on distributed busbar protection - current instantaneous value differential method, impedance method, and put forward the new method of current fault component phase method, then compares with these methods

    本文詳細分析了分散式母線保護中的原理?瞬時值電流差動法、阻抗法，提出了電流故障分量相位法的新方法，將這幾種方法進行比較。
  15. Even if the fault spread from external fault zone to internal fault zone, the differential protection can avoid misoperation. main criterion of protection is composite - percentage current differential algorithm according to every sampled value, which can accelerate the protection ' s trip, reduce large amounts of calculation and have strong stability to ta saturation

    本文採用基於采樣值的比率制動式電流差動保護演算法作為保護的主判據，可以明顯提高保護動作速度和減少計算量；具有較強的抗ta飽和能力，在區內故障時無制動，區外故障時有極強的制動特性。
  16. The device can protect start - up status and running status of asynchronous motors by differential protection, over current protection, negative - sequence current protection, zero - sequence current protection, inverse time current protection, under - voltage protection and so on, can measure every kind of electricity, and can process the function of telecontrol, telemetering and telecommunication

    其依靠電流差動、速斷、負序過流、反時限、零序過流和低電壓等保護方法實現了片電動機的運行、啟動和自啟動過程進行保護，並實現各種電量的計量，同時具有遙控、遙測、遙信的功能。
  17. Abstract : in this paper, the setting scheme of the current differential protection based on sampled values using fault component is investigated. the setting schemes of the resistance coefficient and the least trip differential current are discussed in detail. the probable protection setting values for the hv transmission lines are described. it testifies the feasibility for the applications of the protection to the hv transmission lines

    文摘:對基於故障分量的采樣值電流差動保護制動特性曲線的整定方法進行了研究，詳細討論了其制動系數和最小動作電流的整定方法，同時對該保護在輸電線路中的應用進行了初步的估算，說明了該保護的優異性能。
  18. 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。
  19. 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。
  20. Fully differential current - mode leapfrog - type filter based on mddcc

    基於多輸出端差動差分電流傳送器跳耦結構濾波器
分享友人
分享到 Line

分享到臉書