current supply line 中文意思是什麼
current supply line
解釋
供電導線-
After expounding the power supply and current collection modes of the rolling stock in shanghai umt pearl line in terms of technology and economy, the author argues that two current collection modes shall be adopted for shanghai umt pearl line, i. e. a third rail collector be on skybridge while the overhead contact line on the ground
摘要闡述了城市軌道交通車輛供電受流方式的特點，並從技術和經濟兩方面對上海明珠線車輛供電受流方式進行了探討，提出了明珠線車輛應採用雙受流方式，即高架橋上採用接觸軌受流器受電，地面採用架空接觸網受電弓受電。 -
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。 -
These new methods adopt the circuit information contained in the power supply line current to realize the fault diagnosis. it can increase the fault coverage, reduce testing cost and improve the quality and reliability of ics
它通過從電源電流信號中提取有效的信息來進行故障診斷，能夠提高故障覆蓋率，降低測試成本並提高集成電路產品的質量與可靠性。 -
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 ） 。 -
Under the condition that chinese current turn over tax system is not subject to a structural reform, on - line transactions of digital products should be identified not as sales of goods in the sense of value - added tax, but as the supply of services or transfer of intangible property respectively for business tax purposes according to specific transaction circumstances
在我國現行流轉稅體制未進行結構性的改革調整的情況下，在線交易的數據化產品提供，不宜視為增值稅意義上的銷售貨物行為，而應該區別具體情況，分別確定為營業稅意義上的提供服務或轉讓無形財產交易。 -
Phascon technology introduced in this paper is to improve the outer operation parameters of ac motor, by on line detecting the motor phase angle between current and voltage to adjust the input supply voltage to the motor, to realize the flexible power management mode for ac motor, so as to increase the operation efficiency and reach energy - saving purpose
本文闡述的相控技術是從改善電機外部運行參數入手，通過實時檢測電動機運行相位角來調整電機的輸入電壓和電流大小，實現柔性化能量管理模式，提高電機效率達到節電的目的。 -
On - line monitoring of hvcb is the precondition of predicting maintenance, is the key element of reliable run, and is the important supplement to the traditional off - line preventive maintenance in fact, the faults are made by hvcb, no matter in number or in times, is over 60 % of total faults so it has determinative importance for improving the reliability of power supply and this can greatly decrease the capital waste used by - dating overhaul in this paper, the inspecting way of hvcb mechanism characteristic is discussed the concept of sub - circuit protector is presented, the scheme that we offered has been combined with sub - circuit integrality monitoring theory, to ensure that it has the two functions as a whole according the shut - off times at rated short circuit given by hvcb manufacturer, the electricity longevity loss can be calculated in each operation, and the remained longevity can be forecast too an indirect way for calculating main touch ' s temperature by using breaker shell temperature, air circumference temperature and breaker ' s heat resistance is improved in this paper, and main touch resistance can be calculated if providing the load current msp430, a new single chip microcomputer made by ti company, is engaged to develop the hardware system of the on - line monitoring device, and special problem brought by the lower supply voltage range of this chip is considered fully
高壓斷路器所造成的事故無論是在次數，還是在事故所造成的停電時間上都占據總量60以上。因此，及時了解斷路器的工作狀態對提高供電可靠性有決定性意義；並可以大大減少盲目定期檢修帶來的資金浪費。本文論述了斷路器機械特性參數監測方法；提出了二次迴路保護器的概念，並將跳、合閘線圈完整性監視和二次迴路保護結合起來，給出具有完整性監視功能的二次迴路保護器實現方案；根據斷路器生產廠家提供的斷路器額定短路電流分斷次數，計算每次分閘對應的觸頭電壽命損耗，預測觸頭電壽命；提出根據斷路器殼體溫度和斷路器周圍空氣溫度結合斷路器熱阻來計算斷路器主觸頭穩態溫升的方法，並根據此時的負荷電流間接計算主觸頭迴路的電阻；在硬體電路設計上，採用美國ti公司最新推出的一種功能強大的單片機msp430 ，並充分考慮該晶元的適用電壓范圍給設計帶來的特殊問題；在通信模塊的設計中，解決了不同工作電壓晶元之間的介面問題，並給出了直接聯接的接線方案。 -
But often what is not obvious when reading a manufacturer ' s data sheet is how the initial accuracy of the device is affected by other key device parameters such as line regulation, load regulation, initial voltage error, output voltage temperature coefficient ( tc ), output voltage noise, turn - on settling time, thermal hyste - resis, quiescent supply current, and long - term stability
但，人們閱讀廠家的數據手冊時，因受諸如（電源電壓）線性調整率、負載調整率、初始電壓誤差、輸出電壓溫度系數tc 、熱遲滯（系數） 、靜態電流和長期穩定度等參數的影響而使初始精度往往不明顯。 -
Based on the analysis of the transient and stable features of fault information on line in single carrier power supply with ineffective grounding neutral, this paper puts forward a new method for fault location in small current power system called " gradual identifying law "
本文針對這一問題，在深入研究了中性點非有效接地單端供電系統發生單相接地故障后線路上的各處故障信息的暫態特性和穩態特性的基礎上，提出了一種新的小電流接地系統單相接地故障定位方法- 「遞進信息法」 。 -
The prototype test results indicate : voltage mode and current mode ac - ac mode ac / ac converters with high frequency link have the advantages such as high frequency electrical isolation. simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, no audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type regulated sinusoidal ac power supply, electronic transformer, ac regulator, and wave converter etc
試驗表明，這類變換器具有高頻電氣隔離、電路拓撲簡潔、兩級功率變換（ lfac hfac lfac ） 、功率密度高、雙向功率流、無音頻噪音、變換效率高、網側功率因數高等優點。為新一代正弦交流穩壓器、電子變壓器、交流調壓器、同頻波形變換器的實現奠定了關鍵技術基礎。 -
This controller is based on single - chip microcomputer at89c51, and it can realize automatic welding, line voltage compensation, welding current and voltage display through the combining of constant current and voltage supply control with varied sets of standard parameter storages, fault self - diagnostic programs and system self - protection ability
該控制器以at89c51為控制核心，在恆壓和恆流控制結合的基礎上可實現鋼筋網焊自動化，並具備網壓補償、焊接電流電壓顯示、多套規范參數存儲、故障自診斷及系統自保護等功能。 -
Taking the fieldbus control system of 750 v direct current power supply system in beijing metro line batong as an example, the application of the profibus technique in the power supply system of metro is discussed, and the hardware and software structure and principles of profibus are introduced
摘要以北京地鐵八通線750v直流供電系統現場總線控制系統為例，介紹過程現場總線（ profibus ）技術在地鐵供電領域的應用，論述系統的硬體、軟體結構及其工作原理。 -
With an introduction of the principle and application of linear motor in shanghai maglev demonstration line and urban mass transit, this paper discusses the problems occurred in the power supply system, and the preliminary solution for decreasing the line resistance and reclaiming the stray current
摘要介紹了直線電機的基本原理、不同的應用方式及其在城市軌道交通中的應用情況；並就供電系統中存在的變電所較多、能耗較高等問題，提出了如何設法減少線路總阻抗、如何回收利用迷流等初步解決方案。
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