障壓電壓 的英文怎麼說
中文拼音 [zhàngyādiànyā]
障壓電壓
英文
barrier voltage-
Because of the elements which run under nonideal linearity and unentire symmetry in the power system, the loads which are different and change randomly, the methods which adjust and control the system faultily and operate improperly, the disturbance and the malfunction which happen somewhere, the current and voltage in the supply system are distorted seriously and thus large amount of harmonics are produced
但是,由於電力系統元件運行的非理想線性或非完全對稱、負載的性質各異且隨機變化、調控手段的不完善以及錯誤操作、外來干擾和各種故障的存在,供電網中的電流(電壓)發生畸變,產生大量諧波。But when fault was occurred, sometimes there would be great loss. for the reason, the paper put forward a microcomputer bus protection scheme suit for mv or lv power system with low current grounding based on the great researching about the working theory of current bus protections and the characteristic of mv or lv system with low current grounding. based on it, the paper has designed the platform of the hardware and the software programs
針對國內目前中、低壓電網大都未裝設母線保護裝置,發生故障不能及時切除時造成很大損失的狀況,本文在廣泛研究當前主流的母線保護動作原理並認真分析了中、低壓小電流接地系統特點的基礎上,提出了一套適合中、低壓微機母線保護裝置的研製方案,並據此選擇、搭建了硬體平臺,設計了軟體功能程序。It shows the functional relationship between the instantaneous voltage and time. the intuitionism and particularity of the oscilloscope are outstanding compared with other electronic instruments. therefore, technicians in test and measure prefer to use it
它以圖示的方式把電路中的瞬間電壓同時間的函數關系描繪出來,其測試的直觀性和細致程度是其它測量設備不可比擬的,所以是工程技術人員進行測試和故障檢修時的首選工具。According to the quickly adjustable characteristic of the peterson coil grounding system, this dissertation proposes a new control strategy. when the system is in operation, the strategy can limit the series resonance over - voltage by using the off - resonance method. when fault occurs, the strategy can conveniently suppressing arc by rapidly adjusting the inductance value of the peterson coil to the point, which the resonance with grounding capacitance of the power network is occurred
依據可控硅控制消弧線圈接地系統的快速可控性,一改傳統的電網正常運行時調節消弧線圈接近於全補償的預調諧方法,提出正常運行時採用脫諧方法抑制串聯諧振過電壓;故障時立即調節消弧線圈電感量達到與對地電容諧振,以利熄弧的新型調節原理和方法。This thesis built the models computing the working frequency over - voltage " operation over - voltage for 220kv fugai transmission line, calculates and analyzes working frequency over - voltage " operation over - voltage using emtp program and provides reasonable protection measures for the transmission line. furthermore, regulations method, traveling wave method and striking distance method are used to study and compare lightning - enduring capabilities of different types of pole in power transmission lines aiming at the fact that the lightning strike switching rate of 220kv fugai line is higher
本文分別建立了計算220kv復蓋線路的工頻電壓升高及操作過電壓的計算模型,利用emtp程序對220kv復蓋線路工頻電壓升高、投切空線過電壓、投切空變過電壓、單相故障過電壓進行計算分析,並提出合理的防護措施。Fault analysis and its precautionary measures for electromagnetic voltage transformer in ungrounded system
電磁式電壓互感器在不接地系統中的故障簡析及防止措施Based on researching the function of every kind of eliminating arc loop, new concept was brought up in this paper, and the protective device for eliminating arc and overvoltage was researched and manufactured. when the arc light connecting the ground emerges, the chip synthesizing controller control the vacuum contacter which can be operated with dividing phase and make its fault phase earthed so that the arc light can be dissolved thoroughly
本文在研究各種消弧線圈的基礎上,提出全新的概念,研製出了消弧及過電壓保護裝置,該裝置在出現弧光接地時,通過單片機綜合控制器控制一組可以分相操作的真空接觸器,使故障相接地,達到徹底消除弧光的目的。To resolve the situation that the sensitivity of present ground fault protection schemes is low for the large - sized hydro - generators, a kind of protection scheme based on the fault component of third - harmonic voltage and two kinds of protection scheme based on the fault component of zero - sequence voltage at the terminals and neutral are developed, and they can obtain higher sensitivity and reliability and provide 100 % protection for the stator windings. the influence of noise on the stator ground fault protection based on the local modulus maximum of wavelet transform is analyzed
針對目前大型水輪發電機定子繞組單相接地保護靈敏度偏低的問題,通過分析單相接地故障后機端和中性點零序電壓的變化特點,提出了一種基於機端和中性點三次諧波電壓故障分量和兩種基於機端和中性點零序電壓故障分量的高靈敏度、高可靠性保護方案,並實現定子繞組的100 %保護。The problem about neutral - point - grounding mode is an all - around technical problem which associated with not only power system reliability , insulation coordination , electromagnetic interference , but assault safety 。 in china , the neutral grounding modes of the 10kv net involved of none grounding, grounding by arc suppressing coils, resistance grounding or reactance grounding in the past 。 with the development of civic power network , low resistance grounding mode was used to restrain the over voltage, particularly in guangzhou, shanghai , beijing , and zhuhai etc. it was reported that the over - voltage level of low resistance grounding mode is lower than that of arc suppressing coil mode, but the operation carried out the other way 。 at substations in guangzhou and shanghai it was found that the low resistance grounding mode is successful 。 but in some areas , such as zhuhai , substations grounding with low resistance revealed some problems , including power supply reliability rapidly dropping , transmitting line often tripping ; and person safety being threatened 。 so interiorly the grounding mode selection of the 10kv network was disputed, which mainly focused on the fault form of 10kv net grounding, the apply area of suppressing arcing coil grounding mode, power supply reliability level of the two modes, person safety, communication interfere and the workload of maintenance
爭議點主要是在10kv電網接地故障的形式、消弧線圈接地的應用范圍、兩種運行方式供電可靠性的高低、人身安全、通訊干擾和運行維護工作量等諸多方面。 11 17本論文就是針對以電纜為主的城區10kv電網中性點接地方式的選擇問題進行研究。論文首先對10kv電網的中性點運行各種方式進行分析,比較各方式的特點,然後以重慶儲奇門變電站10kv電網的實際參數來建立數值計算模型,在考慮了電網接地電容電流變化、中性點電阻取值大小、接地點接地電阻值變化等多種影響因素的情況下,對中性點經消弧線圈接地和經小電阻接地方式下電網的過電壓水平和接地點短路電流大小進行了數值計算,其計算結果與電科院所作現場試驗進行了比較。The influence of stray inductance in the module circuit to turn - off transient over voltage of igct has been investigated systematically, the surge current calculation has been done by simulation, and the short circuit failure once occurred in experiment has been analyzed by computer simulation, reproduced the breakthrough failure happened in experiment by means of simulation
充分利用計算機模擬的優勢,詳細分析了模塊電路雜散電感對igct關斷過電壓的影響,進行了短路浪涌電流計算,對試驗中發生的短路故障進行計算機模擬分析,重現了試驗中出現的誤觸發貫穿短路故障現象。In the term of restoration reconfiguration, it is necessary to assure that all lines current and nodes voltage are in the limits of safety
故障恢復過程中保證所有的線路電流或節點電壓在安全范圍限度內。An automatic fault location method is proposed based on ftu after the circuit analysis of single line - to - ground fault in distribution networks
通過對配電網發生單相接地故障后饋線的電壓、電流變化規律的分析,論文提出了基於饋線現場監控終端ftu的故障點智能定位方法。The fault diagnosis system includes four parts : sampling and insulation of the synchronous signal, sampling of the voltage waveform of the rectifier, logic pre - processing and dft analysis, display and alarm circuit
故障診斷系統主要包括同步信號的取樣與隔離、整流電壓的采樣、邏輯預處理及dft分析,診斷顯示報警電路等四部分。Through analyzing the two cases of protection malfunction due to incorrect connection of open - delta connection of busbar voltage transformer, the importance of correct connection of open - delta connection when earthing fault occurring in a power system was explained
摘要通過分析兩起母線電壓互感器開口三角形接線錯誤引起的保護不正確動作,從而說明在系統發生接地故障時電壓互感器開口三角形接線正確的重要性。Directed against the distributing fault disposing mode and centralizing fault disposing mode of distribution distribution feeder automation, we use two different research methods respectively. under the distributing fault disposing mode , combined with the technological ameliorate of the applying plc in the switch control department of the urban distribution ring feeder, we design a new voltage - current feeder automation flow executing by recloses and sectionnalizers controlled by plc to locate the distribution feeder fault section
針對配電網饋線自動化的故障分佈處理模式和故障集中控制模式,分別採用了不同的研究方法:在配電網採用故障分佈處理的模式下,結合應用於城市手拉手配電環網的環網開關櫃的技術改造,設計了一種新的電壓-電流型饋線自動化模式,利用可編程序控制器( plc )來控制饋線上的重合器和分段開關來實現配電網饋線的故障區域定位。Validate system load flow and fault models using instantaneous voltage angles. use system - state measurements to increase stable system loading through reduced margin requirements
批準電力潮流和故障類型使用瞬時電壓角度.通過縮減利潤需求,使用系統狀態測量以增加穩定的系統負荷Carry out the electrical protection for the generator set, such as overload, shortcircuit, under - voltage, ground fault and etc
實現機組過載短路欠壓接地故障等電氣保護Recommended practice for determining the electric power station ground potential rise and induced voltage from a power fault
測定電源故障引起的電站地面電位升高和感應電壓的推薦規程For the convenience of test, varied circuit chip defects caused by the production process are abstracted as all kinds of models. at present the commonly used fault models mainly consist of stuck - at fault, stuck - open fault, bridge fault, store fault, delay fault, etc. testing methods based on voltage testing mainly aim at stuck - at fault model and have also obtained satisfactory result in research for many years. bridge fault is tested easily by quiescent power supply current ( iddq ) testing method. in regard to stuck - open fault that is difficult to testd by quiescent power supply current ( iddq ) and voltage testing, it can is tested by the dynamic current ( iddt ) testing
為了便於測試,我們將生產過程中集成電路出現的多種多樣的缺陷抽象為各種模型。目前常用的故障模型主要有:固定故障,開路故障,橋接故障,存儲故障,時滯故障等。電壓測試主要針對固定型故障模型,多年的研究也取得了令人滿意的結果; cmos電路中的橋接故障則宜用穩態電流測試方法( iddq )測試;對于電壓和穩態電流難以測試的開路故障,可以使用瞬態電流測試( iddt )的方法進行測試。The information includes four types : six analog signals, such as oil quantity, voltage, oil pressure, water temperature, inside and outside temperature ; switching signals, such as the door, window, etc. ; impulse signals, such as car speed, and the rotate speed of engine
研究了汽車在行駛過程中各狀態參量的數據採集。主要包括四類:油量、油壓、電壓、水溫、車內溫度和車外溫度等6路模擬量,全部車燈的故障檢測量,車門、車燈、空調開關等車上常用開關量,車速、發動機轉速等。分享友人