line-to-line fault 中文意思是什麼
line-to-line fault
解釋
線對線故障-
On - line fault diagnosis for high - power power electronics equipments is a significative subject. it is an intersectional subject that has been come into being in order to adapt to the engineering demand
電力電子裝置在線故障診斷是一個具有重要意義的課題，它是適應工程實際需要而形成的一門交叉性的綜合學科。 -
Fault location techniques are used to pinpoint location of the fault on a tra - nsmission line. transmission line faults must be located accurately to allow maintena - nce crew to arrive at the scene and repair the faulted section as soon as possible, which can relief the burdens of patrol personnel and reduce the revenue losses due to power outage. the accurate fault location alogrithms play an important role in power system safety, economy and reliability. in this paper, diversified fault location algorithms are summarized. according to the principles of algorithms, they can be classified into two categories : impedence based algorithm and traveling wave based algorithm. based on the analysis and comparission of each algorithm, the corresponding merits and app - lication limitations are presented
精確的故障定位為現場巡線工作人員及時提供準確、可靠的信息，減輕人工巡線的負擔，同時加快線路的恢復供電，減少因停電造成的綜合經濟損失，為提高電力系統運行的安全性、經濟性和可靠性發揮重要的作用。本文總結了現有的各種測距方法，根據測距的原理將其分為阻抗法和行波法兩大類，對各種演算法的優缺點及適用范圍進行了分析，在此基礎上提出了一種組合的測距方案，並對演算法進行了模擬分析。 -
On the other hand, boundary - scan technique intelligent fault diagnostic method was applied to practice. for most digital system, devices with boundary - scan architecture are broadly used. only using four line or five line to connect pc parallel port with cut tap ( test access port ), all the ptvs can be loaded to cut and all homologous prvs can be taken back to intelligent fault diagnosis system
至於本文採用邊界掃描測試故障診斷技術，是考慮到本系統的通用性和簡潔性，因為對于大多數數字系統而言，具有邊界掃描結構的器件己廣泛應用，本文只需4條或5條信號線就能將pc機和被測邊界掃描電路連接起來，由此極大地簡化了智能故障診斷系統中為實現ptvs加載和prvs獲取而專門設計的介面板電路。 -
Through analysising the characteristics of the power system with floating neutral point deeply, the paper puts forward a new plan of single - phase to ground fault line selection on the base of s ' s signal injecton method and gives the hardware and software design. in this design, the high speed sampling and data processing is carried out through using dsp processor ; the large electrice current is drived through the application of a high - performance audio power amplifier and transformer ; the communication between host computer and detectors is realized through rs485 bus technology ; the difference multilevel frequency - selected amplifier is designed and the feeble signal of space is sampled on the base of the theory of magnetic induction ; the interface between dsp and exterior chip and rs485 interface logical is designed through using fpga ; the using of lcd module and keyboard interfacing chip makes the interface between human and machine ; the programme of host computer and detectors is designed through using blocking design method
在本設計中，採用高速的dsp處理器，實現了對故障特徵信息的高速採集與處理;採用大功率的功放晶元與變壓器配合的方法，實現了大電流信號的驅動輸出;採用485總線技術，組建了裝置主機與多探測器之間的主從式通訊網路，實現了多干擾條件下裝置主機與多探測器的可靠通訊;設計了差分式多級選頻放大電路，採用磁感應的方法實現了對空間微弱信號的接收;利用fpga技術，實現了控制器與多外設的介面及數字信號的串並轉換;採用了先進的lcd液晶顯示模塊及鍵盤介面晶元，設計了人機信息交互的介面;採用了模塊化的軟體設計方法，開發了裝置主機及探測器的軟體程序。 -
When those ptvs are sequentially loaded to cut ( circuit under test ) from intelligent fault diagnosis system, homologous prvs ( parallel response vector ) are taken back. through test response analysis by expert system, intelligent fault diagnosis system can detect all fixed ' 1 ' logic fault, fixed ' 0 ' logic fault, and detect the majority of multi - line short circuit fault
當這些ptvs從pc機中依次加載到被測電路板后，相應的prvs （并行響應向量集）可以獲取供診斷系統進行測試響應分析，從而檢測出固定邏輯故障和橋接故障。 -
This paper researches the non - direct - grounded system fault detection from software arithmetic view, whose main content is as follows : the paper analyses the system running characters before and after fault. and the paper analyses the fault transient signal and fault steady signal and all parts in fault steady signal after the single line - to - earth fault occurs, and discovers the fault laws and appearance of fault signal. the analyzing of the fault laws and fault phenomenon of non - direct - grounded system all above is the base of analyzing arithmetic
本文針對小電流接地系統選線的問題，從軟體演算法的角度進行了研究，主要內容如下：對小電流接地系統故障前和故障后系統的運行特點進行了分析，並且對小電流接地系統發生單相接地故障后，故障暫態信號、故障穩態信號以及故障穩態信號的各種成分進行了深入的分析，找到了故障的規律以及其故障信號的表現形式，為對各種演算法的分析比較打下了基礎。 -
Line - to - ground fault location maintains unresolved to power distribution networks for a long time
而配電網的單相接地故障定位長期以來是難以解決的課題。 -
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。 -
Based on the main fault - character analysis of single line - to - ground fault in non - grounded distribution networks, the location algorithms by injecting current are proposed for diagnosing and locating faults
基於對配電網發生單相接地故障后的故障主要特徵的分析，論文應用加信診斷方法，提出了相應的接地故障定位演算法。 -
This article angle has analyzed the higher professional technical education from cbe / dacum " the electrical control technology " the curriculum ability localization, according to the higher professional technical education " the electrical control technology " the curriculum ability localization, point out the insufficiency and flaw existed in commonly used control electric appliance choice, electrical pilot wire road map, electricity control system installment, wiring craft, electrical control line fault diagnosis system approach, new starting velocity modulation equipment and control circuit, control circuit and main circuit aspect and so on
摘要本文從cbe / dacum角度分析了高職「電氣控制技術」課程的能力定位，根據高職「電氣控制技術」課程的能力定位，指出了現行高職「電氣控制技術」教材在常用控制電器選擇、電氣控制線路圖、電氣控制系統安裝、接線工藝、電氣控制線路故障診斷的系統方法、新型起動調速設備及控制電路、控制電路與主電路的連接等方面存在的不足和缺陷。 -
It includes four criterions of locating fault point ? “ transient zero sequence current amplitude law ”, “ stable base wave zero sequence current phase law ”, “ stable seventh harmonic zero sequence current phase law ” and “ s injection law ”. pointing out how the law locate the fault point to minimal fault section by applying these criterions gradually. the law will not only make up the blemishes existing in current methods for single - phase fault location in small current grounding system, but also locate the fault point to minimal fault isolating unit on fault line
該方法通過將所包含的四個定位判據- 「暫態零序電流幅值法」 、 「穩態基波零序電流方向法」 、 「穩態7次諧波零序電流方向法」和「 s信號注入法」 -進行有選擇地遞進使用，不僅有效彌補了目前已有小電流接地系統單相接地故障選線的缺陷，更將故障定位在故障線路最小故障區段。 -
The merit of travelling waves location is its high precision, but it has dead line if the fault location is close to the line terminal or the fault occurs at the time close to zero point of current
行波法測距的優點是精度高，但對近區故障或電流過零附近時刻發生的故障存在測距死區。 -
The main job of this research is : ( 1 ) analyze the operation situation of power system during faults ; pay attention to the traveling wave on the three - phase transmission line ; study the equation of voltage on three - phase transmission line with impedance capacitance coupling between phases ; contact the voltage on any point with the fault voltage, study the singularity of the voltage signal in fault point, and make it to be the base of the new fault detection method ; ( 2 ) apply the singularity detection theory based on wavelet analysis to the power system faults detection, give a complementary criterion to current fault detection criterion, study how to select the basic wavelet, how to filter noise, how to detect the singular point or fault point, and finally give a total solution. the simulations prove it to be a quick, correct and effective fault detection method
本文的主要工作有： （ 1 ）分析電力系統在發生故障時的運行狀態，尤其對三相傳輸線上的故障行波進行了分析和研究，推導了考慮相間耦合的三相傳輸線電壓方程，並將傳輸線上任一點的電壓與故障點電壓建立起聯系，得出了傳輸線上電壓信號在故障點處的奇異性，並以此作為構造新的故障檢測演算法的理論基礎； （ 2 ）將基於小波變換的信號奇異性檢測理論運用於電力系統故障檢測中，針對目前相關研究的不足，提出了電力系統故障檢測判據的補充判據，通過對基本小波的選擇、除噪措施、信號奇異點也即故障點的檢測方法所作的分析，給出了一個可行的解決方案；模擬研究表明：這是一個快速、準確、有效的故障檢測演算法。 -
A new method for non - interposed testing to the flux and pressure parameters is proposed with ultrasonic. based on the new method, on - line fault diagnosis for weapons and equipments is achieved
本文提出的用超聲波非介入式管外測量方案，無需預留檢測介面，實現了流量、壓力的實時在線檢測，為武器裝備現場診斷搶修奠定了可靠基礎。 -
Since that the choosing line hardware for the neutral ungrounded system has just passed part of the dynamic simulative test, matlab software was chosen to do a lot of simulative tests on single phase - to - grounding fault. and the simulative sampling ratio is almost the same as the hardware ' s. because there is a low wave filter in the hardware, i choose the db15 wave - let to carry out the multidimensional decomposition on the sample by the method of one dimension discrete wavelet in order to obtain low frequency signal including the high frequency transient information on single phase - to - grounding fault
鑒于實驗室已有的小電流接地系統選線硬體的研製只通過了實驗室里的動模試驗，故選用matlab軟體對小電流接地系統進行大量的單相接地故障模擬試驗，模擬的采樣率和硬體基本一致，由於硬體中帶有低通濾波器，故在進行采樣數據的morlet小波分析時先採用db15小波對采樣進行一維離散小波的多尺度分解，使得分解得到的低頻信號剛好包括了小電流接地系統單相接地故障時的暫態高頻信息，然後對這一信息再繼續進行小波演算法分析，分析結論表明利用變換后的實部、虛部和模值能夠較準確的實現單相接地故障時的故障選線和暫態高頻分量的提取。 -
The single phase - to - grounding fault frequently occurs in neutral ungrounded system. the fault line must be found to avoid a phase - to - phase fault. in this paper, firstly, the condition on single phase - to - grounding fault occurring in neutral ungrounded system are discussed and then the main troubles in choosing fault line are pointed out
本文首先分析了小電流接地系統發生單相接地故障時的情況，指出選線所遇到的主要困難，進而對小電流接地系統單相接地故障的選線及測距的方法做了比較和綜述。 -
This paper analyses the transient character of line fault when the neutral point connects to ground in different ways. from the angle of signal processing, the wavelet packet analysis theory is introduced to selecting fault, in which the fault character is not the steady signal but the transient signal
本文在中性點不同接地方式下，研究和分析了線路故障特徵量的暫態特點，主要從信號處理的角度，提出將小波包分析理論運用到故障選線。 -
This paper analyses the steady and transient character of line fault when the neutral point connects to ground in different ways. from the angle of signal processing, the wavelet analysis theory and the artificial neural networks are introduced to fault location, in which the fault character is not the steady signal but the transient signal
本文在中性點不同接地方式下，研究和分析了線路零序故障特徵量的穩態和暫態特點，主要從信號處理的角度，提出將小波分析理論和人工神經網路原理運用到故障定位，將基於穩態信號的定位原理轉移到基於故障特徵量暫態信號的定位原理。 -
This article is to search the development and application of d. c. motor fault diagnosis technology, based on the on - line monitor and fault diagnosis on d. c. motors in sendzimir mill of silicon rolling mill in wuhan iron & steel corporation
本論文主要圍繞武鋼硅鋼廠森吉米爾軋機生產線直流電機在線監測與故障診斷工作展開，探索直流電機故障診斷技術的發展和應用。 -
In order to settle this problem, basing on a power electronic controlled fast adjustable perterson coil, this paper provide a new principle of selecting the line with the fault, which make use of the dynamic changes in the current through the zero order line
為了解決這一問題，本文在一種由電力電子技術控制的快速調節消弧線圈的基礎上，提出一種新的故障選線原理，利用線路零序電流的動態變化量來選線。
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