方向電流保 的英文怎麼說

中文拼音 [fāngxiàngdiànliúbǎo]
方向電流保 英文
directioal current protection
  • 方 : Ⅰ名詞1 （方形; 方體） square 2 [數學] （乘方） involution; power 3 （方向） direction 4 （方面） ...
  • 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...
  • 保 : Ⅰ動詞1 （保衛; 保護） defend; protect 2 （保持） keep; preserve; maintain in good condition 3 （...
  • 方向 : direction; orientation
  • 電流 : current; galvanic current; electric current; electricity; current flow電流保護裝置 current protec...
  1. The main features of the apparatus are focus on small volume, light weight, no iron core, no magnetic saturation and no ferreous resonance, moreover, related advantages such as the large range of transient and frequency response, excellent electrical magnetic compatibility, oil - free configuration, reliable insulation structure, are all the trends of current transformer in the future. meanwhile, it should agree with the future power gauge and digital, computer, automatic relay protection. it will meet the demand of digital power network

    它具有體積小、重量輕；無鐵芯、不存在磁飽和與鐵磁諧振問題；動態響應范圍大，頻率響應寬；抗電磁干擾性能強；無油化結構、絕緣可靠、價格低等優點；是未來電流互感器發展的方向，是新一代電力數字網發展的需要，適應電力計量和保護數字化、微機化和自動化發展的潮流。
  2. The paper presents a distribution analysis software platform which is developed combining computer graphical theory and oop ( object - oriented programming ). the platform includes three modules, the graphics module, the database module and the computation module. the graphical module can draw the key diagram of power system ; the database module can save, browse and edit the data of power systems ; the computation module can compute the power flow

    本文運用面向對象的程序設計方法結合計算機圖形學的知識，開發了一套可視化配電網分析軟體平臺，它包括用於繪制電力系統結線圖的圖形模塊、用於保存、瀏覽、修改電網數據信息的數據庫模塊和進行配電網潮流計算的計算模塊。
  3. The high - power semiconductor quantum well ( qw ) laser is a kind of luminescence device with superior performance, it has longe - lived, low threshold current density, high efficiency, high luminosity and excellent monochromatic, coherence, directionality, etc. the high - power semiconductor laser is widely applied to the fields, such as military, industrial machining, communication, information processing, medical treatment, etc. the material ' s epitaxy is the foundation of the whole laser ' s fabricating, and it has important influence on the optics and electricity performance about the laser

    大功率半導體量子阱激光器是一種性能優越的發光器件，具有壽命長、閾值電流密度低、效率高、亮度高以及良好的單色性、相干性、方向性等特點，廣泛應用於軍事、工業加工、通信及信息處理、醫療保健等領域。材料的外延生長是整個激光器器件製作的基礎，對器件的光學和電學性能有著重要的影響，生長不出優質的材料體系，獲得高性能的器件就無從談起，因此，材料的外延生長便成為了整個半導體激光器製作過程之中的重中之重。
  4. This paper discusses the ability of avoiding maximal power flow of quadrilateral impedance relay and round impedance relay in detail and puts forward the setting principle and setting method of load limiting resistor of backup distance protection

    本文對四邊形和方向圓特性阻抗繼電器躲線路最大潮流的能力進行了詳細分析，提出了距離保護負荷限制電阻的整定原則和整定方法。
  5. Technical specification for zero sequence current direction protection equipment

    零序電流方向保護裝置.技術條件
  6. Abstract : zero sequence directional power protection is widely used in neutral directly grounded system

    文摘:在大電流接地系統中廣泛採用著零序功率方向保護。
  7. Firstly, we analyze the transient and steady character of single phase high - impedance grounding fault. secondly, based on wavelet analysis on checking mutational signal and direction high frequency protection theory, utilizing zero sequence current and module current, this paper provides a new scheme including fault starting element, fault phase selection element, directional element and main criterion. this scheme can bear high impedance and is immune to system surge and frequency warp, which gets over the shortcoming of the lack of sensitivity

    由於現有的保護方案無法快速有效地切除此類故障，本文在詳細分析了單相高阻接地故障的穩態和暫態特性的基礎上，從小波分析原理出發，利用小波變換檢測突變信號的原理，以零序電流、模電流等為研究對象，結合方向高頻保護的原理，設計了一套包含啟動元件、選相元件、方向元件、主保護的保護新方案。
  8. Adopting rotor field - oriented vector control methods, through which make the stator and the rotor magnetmotive forces can be kept orthogonal all along during operation of the bldcm, combining hysteresis current modulation ' s current control advantage and space voltage vector modulation ' s torque ripple attenuation advantage, then designing a sort of bldcm hysteresis current svpwm control method

    摘要研究採用轉子磁場定向的矢量控制方法使無刷直流電動機定、轉子磁勢矢量始終保持正交，結合滯環調制電流控制和空間電壓矢量調制，設計了無刷直流電動機滯環電流svpwm控制方案。
  9. Jdy - 280 electromagnetic lock with led product characteristic : easily installed, low noise and durable ; strong magnetic force, no magnet left when power off with led and network signal output built - in reverse wave protection function usage range : be used with intercoms and access control systems can be installed onto wooden door, metal door, glass door, fireproof door function : working voltage : 12vdc, 24vdc working current : 12vdc 0. 53a, 24vdc 0. 27a working condition : 40 50 working mode : cut off power to open wires are insulated, dc500v absolutely insulated in 1 minute. dimension of the magnet board : : 184 x 36 x 11mm dimension : 235 x 45 x 30mm weight : 1980g yiwu qimingxing computer company copy right

    Jdy - 280磁力鎖帶指示燈產品特性:安裝方便噪音低壽命長吸力強無剩磁內置反向突波保護功能適用於90開門，有門偵測信號帶鎖狀態指示燈及聯網信號輸出適用於樓宇對講門禁系統配套使用適用門型：木門金屬門玻璃門防火門電氣性能：工作電壓： 12vdc 24vdc工作電流： 12vdc 0 . 53a 24vdc 0 . 27a工作環境： 40 50工作方式：斷電開鎖鎖狀態有指示燈指示：鎖門時綠燈指示燈亮開門時，紅色指示燈亮絕緣電阻測試： dc500v 1分鐘無擊穿鐵板尺寸： 184 x 36 x 11mm外形尺寸： 235 x 45 x 30mm重量： 1980g
  10. According to the test conditions, the double polarity inputting mode is adopted in the circuit of voltage - frequency converting part ; storage batteries are used in the optical emission part of optical fibre isolating and transmitting device, that can guarantee isolation between the main circuit and the testing system ; the 89c51 singlechip is used in the singlechip testing - controlling unit, the peripheral circuits are extended, data are transmitted through the serial port in this part ; the p opular software delphi5. 0 is used in the pc part, the communication between singlechip and pc by serial port, plotting of current wave, regulation of data ; the optical - electrical isolating and triggering are used in the controlling part, this can guarantee the veracity and reliability of breakers triggered, this triggering mode is also used in the triggering of the main closing breaker, the tested breaker and the assistant breaker, the triggering signals are sent out by a singlechip

    壓頻轉換部分電路中根據實際情況採用了雙極性輸入方式；光纖隔離傳輸裝置的光發射部分電源採用了蓄電池供電，確保了主迴路與測試迴路的完全隔離；單片機測控部分採用了89c51單片機，擴充了外圍電路，通過串口向pc機傳送數據； pc機與單片機之間的串口通訊、波形繪制、數據管理等都採用了軟體delphi5 . 0編寫。該測試系統中預留了輸出口，可以對合成迴路中的主合閘開關、被試開關、輔助開關進行觸發，信號由單片機發出，控制部分採用了光電耦合隔離觸發的方法。軟體設計主要集中在對電流信號的數據採集、數據處理、數據傳送、人機界面、波形繪制和數據管理，軟體部分又可分為單片機和pc機程序設計兩大部分。
  11. For this reason, the general algorithm on fault calculation is researched in protection relay setting, and fast calculation on branch current is put forward for the first time in this paper. so the complete and quick fault analysis is provided for protection setting

    為了滿足工程實際需求，本文作者積極探索了面向繼電保護整定計算的通用故障分析演算法，首次提出了適用於任意故障類型的支路電流的快速演算法，為保護定值的整定計算提供了完備而快速的故障分析方法。
  12. The contributions done are as follows : according to the mathematical model of doubly fed motor and the theory of vector control, a unit power factor of rotor control scheme is proposed. in the doubly fed adjustment system, in order to control magnetic torque of motor this scheme is designed by controlling the reverse direction between rotor voltage and current to keep the vertical direction between rotor current and flux. it is known from theoretical analysis that for partly decoupling this scheme is only effective under sub - synchronization speed, but not control the system and obtain steady state since speed adjustment system ca n ' t adjust the magnitude of rotor flux under sup - synchronization

    而傳統的無速度傳感器雙饋調速矢量控制系統，由於採用磁鏈定向方法，在同步速附近存在較大的工作死區，針對上述問題，本文做了如下的研究工作：本文從雙饋電機的數學模型出發，根據矢量控制的基本原理，提出了一種轉子側功率因數為1的雙饋電機矢量控制方案的設想，即在雙饋調速時採用轉子電流定向的方法，並控制外加轉子電壓與轉子電流始終反相，以保持了轉子電流與轉子磁鏈矢量垂直，通過控制轉子電流的大小來達到控制電機電磁轉矩的要求。
  13. E - commerce material flow manage system is a complicated systems engineering, this paper particularly discusses the developmental necessity and feasibility of postal logistic in baicheng, and designs the blue print of postal logistic in baicheng. this e - commerce material flow manage system in baicheng is a big logistic service platform with the open and safe business data exchange function, with ‘ 11185 ’ telephone client service center, ‘ bc183 ’ internet attaching into, wap and electronic post - office terminal as multiple way attaching into, and with ‘ green card ", " bank unionpay " and others as manifold payment methods. it can offer some e - business services from business accepting, distinction, saving, distribution transport, delivery to stock - in - trade

    此系統以電子商務各類標準和ca認證安全體系為保障，以「 11185 」電話客戶服務中心、 bc183網際網路接入、 wap以及電子化支局終端等為多種接入方式，以「綠卡」和「銀聯」等為多種支付手段，具有開放的、安全的業務數據交換功能的電子商務物流服務大平臺;向廣大用戶提供從業務受理、分揀、儲存、配送、運輸、投遞，到為客戶提供存貨管理、配貨集運、支付代理、信息服務等電子商務綜合物流服務。
  14. Moreover, a strategy for imputation of null values based on changed precision model is put forward to improve anti - disturbing ability of model secondly, several primary algorithms are indrouced and discussed, the direction and target of discretization is analysised, to gain logical cuts, a method to discretize continuous attributes based on rough entropy is brought forward at last, the potential client datamining system in electronic commerce is put forward, all given algorithms is applied to the system, and compared by test results, and the new idea of this paper is simply described and some problems in this paper that need to improved on are proposed

    然後，對目前流行的離散化演算法進行了詳細的分析和評價，指出了離散化的方向和目標，並提出了基於粗糙信息熵的離散化演算法，以便在保證劃分后決策表相容性的前提下，獲得比較合理的劃分點。最後，提出了電子商務的潛在客戶挖掘系統，並將前面提出的基於粗集的演算法理論應用到該系統中，同時和其他幾種現有的數據補齊和離散化演算法進行了實驗比較和結果分析。並指出本文創新之處以及存在的問題和努力的方向。
  15. It elaborates on the 3 - step start technique. i adopt the method which permits the bldc motor to automatically search the best time to change its operation stage from a separately controlled synchronous one to a self controlled one using the back emf as the commutation signal. this method prevents the stepping out and stopping problems in the changing procedure of the motor

    闡述了電機的三段式起動方法，在直流無刷電機由起動階段外同步運行切換到反電勢換向自同步運行的過程中採用了自尋最優點切換的方法，保證了電機在切換過程中不會發生失步和停轉現象。
  16. This makes all the conductors under one pole carry current in one direction

    這樣就可以保證流經導體的電流在一個磁極下的方向不變。
  17. In the recent years, many scholars of the inside and outside country advance a series of arithmetics based on graph theory with reseach for the optimal setting coordination for current protection and distance protection in a complex multiloop network. the calculation for minimum break points set as stat for coordination of setting is the core of these arithmetics and large

    近年來國內外許多學者基於圖論方法，對復雜環網方向電流保護和距離保護最優整定配合問題進行了研究，提出了一系列演算法，其中作為整定配合起始點，且具有最少基數的保護集合? ?最小斷點集（ mbps ，即minimumbreakpointset ）的計算是整個演算法的核心，也是計算量最大的部分。
  18. Scr silicon controlled rectifier - - a three - electrode solid - state device which permits current to flow in one direction only, and does this only when a suitable potential is applied to the third electrode, called the gate

    可控硅整流器可控硅整流器? ?三電極固態元件，只有當匹配的電壓作用於第三電極（選通電極）時，才能夠保證電流朝一個方向流動。
  19. Among ( lie regulation task of management tliere. are thive locus problans which must be dealt with effectively, keeping tlie steady consumer relationship, maintaining ( lie logistic infonnation system miming efficiently and smoothly and constructing perfect logistics measurement and evaluation sv ' slem. dealing with tlie three tasks eflbctively is not only ( lie pro - requisition of tlie steady aiming of logistic ( or e - commerce, but also the key to perfecting the logistics at present

    在日常管理中必須注意三個比較突出的方面，即維持穩定的客戶關系、維持物流信息系統的穩定高效運作、建立完善的物流績效評價機制，以便發現物流存在的問題並明確其完善的方向，進而使整個電子商務環境下的物流系統保持良性運作。
  20. Seize development direction of electric measurement technology, energy - saving and environmental protection technology ; lead and guide technicians in forefront research ; lead domestic and international academic and technological exchange activities

    把握電力測試技術、節能環保技術領域的發展方向；帶領、指導技術人員開展具有前沿的科研項目；帶領全所開展國內外學術、技術交流活動。
分享友人
分享到 Line

分享到臉書