dc line 中文意思是什麼

dc line 解釋
直流線路
  • dc : ＝1 direct current 直流電：a DC generator 直流發電機。2 District of Columbia 哥倫比亞特區〈美國首...
  • 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...
  1. After analyzing several kinds of protection for feeder line in subway dc traction power supply system, it is pointed out in the paper that the phenomena of refusing action and error action can not be avoided with existing protection which can not protect the whole feeder line

    摘要分析了地鐵直流牽引供電系統中幾種常用的饋線保護類型，發現現有的保護方法很難避免跳閘保護拒動或誤動現象的發生，並且不能保護饋線的全長。
  2. The modulating signals of firing delay angle at the rectifier and firing lead angle at the inverter, and the excitation voltage are chosen to be control variables. the offset of the current of dc line and the extinction angle and the power angle of generator are chosen to be control outputs. then a nonlinear controller is designed for the system under study according to direct feedback linearization theory

    以整流側觸發延遲角的調節信號、逆變側觸發超前角的調節信號以及發電機勵磁電壓作為控制變量，以直流線路電流、逆變側關斷角以及發電機功角的偏移量作為目標輸出，用直接反饋線性化方法設計了系統的非線性控制器。
  3. In the study of the effect of electric field on the binding property of copper foil - covered veneer sheet, because of lack of experimental method and the complexity of the object studied, it is not found the regular effect of electric field on the binding strength between copper foil and veneer sheet or on the inter - laminar binding strength of veneer sheet. but it is further testified that dc electric field makes the free linkage generated during solidifying of epoxy resins orient along the direction of electric - power line

    在直流電場對覆銅箔板粘接性能影響的研究中，由於受實驗手段和研究對象復雜性的限制，沒有發現直流電場對覆銅箔板銅箔與基體及基體層間的粘接強度產生規律性影響，但在研究中進一步證實了直流電場會使環氧樹脂在固化過程中形成的交聯鍵沿電場方向取向。
  4. Through the illustration of the short - circuit test method and through the analysis on final data of the catenary line for dc traction system of shenzhen metro vehicles, it is shown both the set values for the short - circuit calculation and the equipment selection are correct

    通過對深圳地鐵直流牽引系統接觸網短路試驗方法的闡述及最終數據的分析，表明短路計算整定值和設備選擇的正確性。
  5. Di - on electric one of the beijing hi - new - tech enterprise develop and manufacture lots of equipment like sf6 dewpoint meter dp100, cable fault location system cfl6000 and more. di - on electric supply the most advanced technology and equipment on such as gis surge arrestor on line monitoring, resistance measuring, ac dc metrology, thermal - temperature bridge, power transformer diagnostic and testing, cable diagnostic and fault location, sf6and oil moisture measuring, oil treatment and testing, optic fiber temperature monitoring, circuit breaker testing, relay testing and more

    迪揚電氣在gis和避雷器的帶電測試與故障診斷分析，電力電纜的故障定位與局放檢測，變壓器電抗器的各種測試診斷與溫度監測， sf6的水分測量與回收，絕緣油的測試分析與濾油處理，紅外測溫與光纖在線測溫，以及各種電阻測試與計量，溫度計量與電能計量等方面擁有世界一流的技術與成熟的儀器設備。
  6. Drawing capstans are arranged in straight - line, the metering capstan is driven by separate dc motor. drawing dies can be quickly changed

    鼓輪直線式排列，定速輪單獨直流電機驅動，可實現快速換模功能。
  7. The conventional switching power supply usually use a diode rectifier followed by a bulk capacitor to convert ac voltage to dc voltage, resulting in the pulsating waveform of the input ac line current, low power factor ( generally 0. 65 ) and high harmonic line current

    傳統的開關電源設備通常採用二極體橋來進行整流和一個較大的電解電容來進行濾波以實現輸入電壓的交直流轉換，導致輸入電流為一個很窄的脈沖波並含有較多的諧波分量，功率因數變低（通常只有0 . 65 ） 。
  8. In the passive circuit part, according to the theories of microstrip line and coupled microstripwe, the characteristic of microstrip and coupled microstrip was analyzed, the x band filter and dc block circuit of amplifier have been designed by hp - ads software

    為毫米波設備提供本振源。在無源電路部分，我們首先對微帶線、耦合線等基本理論作了簡單的介紹。
  9. Maintenance on line to rail with high frequency inverter dc welding machine

    高頻逆變焊機用於鋼軌及轍叉線上焊補與維護
  10. On the contrary, because of the effect of positive damping provided by the inverter, the unit near a inveter will have no subsynchronous oscillation risk. based on the same method described above, a damping study is carried out for a hybrid ac / dc system, which include a hvdc link and an ac transmission line in parallel

    研究表明，系統整流站附近的同步發電機組要承受電氣負阻尼作用，因此有可能引起機組低頻扭轉振蕩模式失穩；而hvdc的逆變站向其臨近同步發電機組提供正阻尼，因而機組不存在次同步振蕩危險。
  11. Dc testing, applying to transformer and inductor winding copper resistance 、 relay contact resistance 、 switch and socket contact resistance 、 lead resistance 、 compenent solder resistance 、 pcb line and hole resistance 、 metal detection, ect

    直流測試，適用於變壓器及電感線圈銅阻、繼電器接觸電阻、開關、接插件接觸電阻、導線電阻、元件焊點接觸電阻印製板線條及焊孔電阻、金屬探傷等。
  12. Purpose of the rectifier transformers is to operate with the ac / dc power converters connected to them, to adapt the power line voltage to the voltage required by the load but can ' t provide galvanic separation between load and power line

    整流變壓器的作用是連接到ac / dc電源轉換器上將電源側電壓轉換為負載所需電壓但不提供負載和電源之間的電隔離。
  13. But even at this height an overhead dc line will beat an ac line at distances more than 1, 000km ( 600 miles ), while ground - level dc will beat ac at distances as short as 30km

    但即使是這樣的高度，高架直流電纜也比交流電纜的最大傳輸距離遠1 ， 000千米（ 600英里）以上，地面直流電纜比交流電纜傳輸距離遠30千米。
  14. But up to now, the study on dc transmission line " external insulation in the severe atmospheric environment could not meet the requirement of electric power industry development

    到目前為止，對復雜環境中直流輸電線路外絕緣特性的認識還遠遠不能滿足電力工業發展的要求。
  15. The companies manufacture various professional electronic links, jiechajian procedures, audio, video plugs line, computer peripheral plugs line, ac, dc plugs lines, the various emission line spacing and jiechajian procedures applicable to different types of home appliances, communication products and equipment control circuits connecting

    本公司專業生產製造各種電子連接線，接插件，音、視頻插頭線，電腦周邊插頭線， ac 、 dc插頭線，有各種間距的排線及接插件，適用於各類家用電器、通訊產品及儀器的控制線路連接。
  16. Salt density measurement method for natural polluted insulator string used on dc transmission line

    直流線路絕緣子串自然污穢鹽密測量方法
  17. Many advantages of the controller are proven by simulation, such as modulating power flow of transmission line and voltage of node, maintaining the voltage stability of capacitance ' s dc side, stabilizing system ' s power - angle character and good dynamic characteristic

    通過簡單系統的暫態模擬表明，該控制器在調節線路潮流和節點電壓、維持直流側電容電壓穩定以及系統的功角穩定方面有良好的效果，而且具有良好的動態品質和調節效果。
  18. The only access points for transients are via the ac or dc power line wires and all of the data and telcom signal wiring that enters and leaves the cabinet

    電涌的唯一進入通道是交流或直流電源線及所有進出金屬箱的數據線和信號線。
  19. The input of traditional ac - dc converter is diode - capacitance combined circuit. it ? input current wave presents pulse shape, and the power factor ( pf ) on ac line side is low

    傳統的ac ? dc開關變換器輸入端是二極體整流-濾波電容組合電路，其輸入電流波形呈脈沖狀，交流網側功率因數很低。
  20. In case of complicated dc circuit, any type of symmetrical ac system fault. dc line fault and dc line ' s recovery after fault can be more accurately simulated, and the dc line ' s dynamic response can be better represented. all the above is very important when doing the research on dc power support to ac system under emergency conditions, and has laid a solid foundation for the interaction study which will be met in a hybrid ac / dc power systems

    該模型能夠在對交流網路進行機電暫態計算的同時，對直流網路進行電磁暫態的計算，因而能較精確地考察暫態過程中直流線路的動態行為，並可對任意對稱的交流系統故障、直流線路故障以及故障后直流輸電系統的恢復等過程進行模擬，且模擬時間較短，為在復雜系統中研究直流輸電系統與交流輸電系統間的相互作用奠定了基礎。
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