through fault current 中文意思是什麼
through fault current
解釋
穿越故障電流-
There is great change of negative current component when it happens the line - open fault. it is marked as the occurrence of the fault. and it can be concluded the phase characteristic of negative current in the line. in the transient course, there are plenty of harmonics in the fault line. through the transient analysis, it is drawed that the amplitude of each harmonic in fault phase is greater than other phases. harmonic current in fault line is far greater than other normal lines
發生斷線故障以後，線路中會出現負序電流的突變，可以作為故障啟動判斷的標志，並且通過分析得出了故障時負序基波電流的相位特點。在故障暫態過程中，故障電流中含有大量豐富的諧波成分，各次諧波在故障期間有突變，並且衰減很快。 -
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。 -
Moreover, the epiipc functions properly and stably under well due to the reasonable electrical circuit design and very strong anti - jamming design. this design successfully solves the directionally power current leakage fault action and reject action, and makes it working in both neutral point non - grounded and grounded through resistors or coils under compensate systems and over compensate systems
本次研製的保護器較好地解決了功率方向型漏電的誤動作和拒動作問題，使得它既能較好地運行在中性點不接地的系統中，又能用在中性點經消弧線圈接地的欠補償系統中，同時試用於過補償系統中。 -
This thesis chooses b spline wavelet that adapts to the analysis of power system signal, and uses the wavelet transformer to analyze the magnetizing inrush current and inner fault current. a transformer microcomputer protection was designed in this thesis, and in the base of intermission angle principle, a new criterion was established, which pierces through the traditional method with accurate measurement of intermission angle, but analyses the wave by wavelet transform. this criterion is lower in hardware, so it will be realized in the existing hardware
本文選擇適合電力系統信號分析的b樣條函數作為母小波，對勵磁涌流和內部故障電流進行小波分析，並設計微機型變壓器保護基本配置，在以往間斷角原理鑒別勵磁涌流的基礎上，突破傳統精確測量勵磁涌流間斷角的方法，直接對信號小波變換后的波形進行分析，建立一個新的鑒別勵磁涌流判據，該判據對硬體要求不高，可以在現有一般硬體平臺上實現；並編寫以b樣條函數為母小波的小波變換判據演算法程序。 -
Guide for liquid - immersed transformer through - fault current duration
液浸式變壓器穿越故障電流持續時間的指南 -
Through fault current
穿越故障電流 -
It utilizes zero impedance branch characteristic, combining structure - transform and structure - static short - circuit current calculation method to calculate the short - circuit current directly through the electrical equipment when short - circuit fault takes place at the two sides of the electrical equipment, and settles the problems that the traditional method cannot directly figure out the short - circuit current
該方法利用零阻抗支路特點，結合定結構和變結構短路電流計算方法，能夠直接求出在電氣設備兩側分別發生短路時，通過電氣設備（如斷路器）的短路電流，從而合理地解決了傳統的故障分析方法不能直接求出流過設備的短路電流的問題。 -
After the neutral point is grounded through perterson coil, it can decrease the capacitor current through fault point and the over - voltage caused by the grounding fault, which is advantage for the extinguishments of electric arc
中性點經消弧線圈接地后，有效減小了流過故障點的電容電流，減小了弧光接地過電壓，有利於電弧熄滅。 -
After the neutral point is grounded through peterson coil, it can decrease the capacitor current through fault point and the over - voltage caused by the grounding fault, which is advantage for the extinguishments of electric arc
中性點經消弧線圈接地后，有效地減小了流過故障點的電容電流，減小了弧光接地過電壓，有利於電弧熄滅。 -
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。 -
Through research on principle and approach, this paper puts forward three new methods in power cable fault location. the first method is based on wavelet reconstruction, and the measured signal which is the difference between the faulty and sound phase current under the high voltage pulse excitation, is transformed using wavelet, and the high frequency component is reconstructed at single scale
基於小波重構的電纜故障測距方法採用脈沖電源作用下故障相與健全相的電流差作為測量信號，利用小波變換對其作多尺度分解，然後對信號在高頻下進行單支重構。 -
The dynamic power supply current ( iddt ) is a new window through which we can observe the switching activities in digital circuits. iddt testing methods make possible further increasing the fault coverage
動態電流提供了一個觀測電路內部開關性能的新的窗口，動態電流測試方法為進一步提高故障覆蓋率提供了可能。 -
In addition, the enormous use of cables in city power system increases the current through the grounded capacitor. these make the single - phase fault current get greater, which lead to more and more instantaneous grounding faults unable to eliminate naturally
近年來，由於城市配電網路規模的不斷發展，以及城網中大量使用電纜，使得系統的接地電容電流大大增加，系統單相接地故障時接地電弧不能自動熄滅，越來越多的瞬間單相接地故障不能自動消除。 -
Guide for dry - type transformer through - fault current duration
乾式變壓器全故障電流持續時間指南 -
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。 -
Guide for liquid - immersed transformer through - fault - current duration
硅絕緣油的驗收及其在變壓器中的維護指南
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