transmission-line impedance 中文意思是什麼
transmission-line impedance
解釋
傳輸線阻抗- transmission : n 遞送；傳遞；傳達；傳染；移轉；【機械工程】傳動；傳遞；變速器；聯動機件；【無線電】傳送；發射；...
- 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...
- impedance : n. 【物理學】阻抗。 acoustic impedance聲阻抗。
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Applying relative arithmetic to all kinds of faults and calculating off - line, we can master time - distance relation chart for all kinds of faults. computation indicates : when transmission lines occur faults, the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance. the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle, calculating work voltage by using fault component, calculating the torque created by a phase comparator or a magnitude comparator
實際的計算表明：輸電線路發生故障后，用故障前後的數據同時充滿保護演算法的數據窗，對于快速切除近區故障具有很重要的意義；同時利用故障前後的數據，下述方法可以比較好地實現距離保護的反時限特性：直接用全周傅里葉演算法進行阻抗計算；採用工頻變化量阻抗繼電器進行工作電壓的計算；採用轉矩的思想進行轉矩的計算。 -
Unified power flow controller ( upfc ) is one of the most powerful and most promising controllers of facts. if we use upfc to control the transmission parameters, terminal voltage, line impedance and phase angle in normal situation and use it to compensate zero sequence and negative sequence currents when one of transmission lines is cut off, we can implement two phases operating in high voltage transmission lines, which can improve stability and reliability for the transmission system
統一潮流控制器（ upfc ）是功能最強、最具發展潛力的靈活交流輸電系統（ facts ）控制器之一，如果在常規條件下，用upfc實現輸電線路的電壓調節、移相、潮流控制、阻尼振蕩等功能，在發生單相永久性接地或單相斷路故障時，由傳統的三相跳閘改為單相跳閘，用upfc的並補來濾除兩端系統的零序和負序電流，用upfc的串補來提高輸電線的傳輸功率，以實現兩相長期運行，那麼輸電系統的穩定性、可靠性將大大提高。 -
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。 -
The contents are using fault locating algorithm based on measurement impedance to determine a fault zone of transmission line, then use wavelet transform fault locating algorithm based on current traveling wave to fix the fault position. in order to ensure both results are valid, gps is used to synchronize their hardware. 2
其主要內容是：利用所記錄的工頻故障信息和阻抗法粗略計算故障位置，再利用所記錄的暫態行波電流精確定位故障點，二者通過gps時間同步單元進行時間同步，從根本上解決輸電線路故障測距問題。 -
In this dissertation, a key point of the study is to build up a mathematical model of the character impedance the swr sensor. the structure of four equal - length probes can be viewed as a special form of coaxial hansnussion line. combining the character impedance of coaxial and the para1lel transmission line, the character impedance model of probe with eqtlaling length was built up by utilizing mathemaical theory of approach
本文將四針等長式結構的土壤水分探頭看成是同軸傳輸線的特殊形式，從標準傳輸線特徵阻抗入手，結合平行傳輸線，運用數學上常用的夾逼定理，得出了四針等長結構的土壤水分探頭特徵阻抗數學模型，由此提出swr型土壤水分四針不等長探頭的特徵阻抗數學模型。 -
Characteristic impedance of coupled offset rectangular bars transmission line between parallel plates
偏心矩形柱耦合傳輸線的特性阻抗 -
System scheme of speech coding plus spread spectrum communication was presented based on a full analysis of noise characteristic, attenuation characteristic and impedance characteristic of low - voltage power line. spread spectrum carrier ( abbreviated as ssc ) technology is adopted to overcome problems existing in signal transmission over power line. high quality, low rate mbe compression algorithm was used to complete speech encoding and decoding
在對低壓電力線路的噪聲特性、衰減特性和阻抗特性三個方面充分分析的基礎上，本文提出一種語音編碼+擴頻傳輸的系統總體方案，採用擴頻載波（ spreadspectrumcarrier ，縮寫為ssc ）技術克服電力線傳輸信號存在的問題，採用語音合成質量高並具有較低碼率的mbe壓縮演算法完成語音信號的編解碼。 -
Usually the bridge circuit has a relatively high input impedance so that it has an insignificant effect on the signals in the transmission line
通常橋接電路具有較高的輸入阻抗，因此傳送線上的信號將不受影響。 -
The operation characteristic of the new relay is analyzed in theory and verified by the simulation tests. the new relay operates with clear selectivity and high operation speed and can satisfy the demand of the protection for the ehv transmission line. the performance of the fault component impedance relay has been improved and the misoperaion of the healthy phase under cross - country fault and close - in fault have been avoided
理論分析及模擬計算表明，基於自適應補償的突變量距離繼電器有很好的選擇性和速動性，完全能夠滿足高壓線路保護的需要，顯著提高了突變量距離的性能，解決了其在大電源出口單相故障以及正反向復故障可能會誤跳三相的缺點。 -
It is importance to accurately conform the wave impedance of tower, when the wave impedance of tower change sign 10 percent independently, the back stroking rate of transmission line will change sign 20 percent accordingly
正確確定桿塔的波阻抗是很重要的，當桿塔的波阻抗獨立地變化10 %時，輸電線路的反擊跳閘率將相應地變化約20 % 。 -
First, we introduce the basic theory, which is useful to density measurement, namely, transmission - line theory, its content consist of transmission - line equivalent circuit 、 smith chart 、 impedance matching and microwave network technology. the on - line density measurement technology with microwave has been narrated as a key part
首先，分析了微波密度在線測量技術的理論基礎- -傳輸線理論，其內容包括將用於諧振腔設計的傳輸線等效電路、施密斯圓圖以及阻抗匹配和微波網路等多方面的技術。 -
Real - time characteristics of data transmission, remarkable transmission, error - detection and automatic retransmission built in can protocol make it a good option for power line carrier communication, which has some obvious drawbacks such as wide - range variant input impedance, interference and signal attenuation
Can協議中數據的實時傳輸、卓越的錯誤檢出及自動重發功能為建立高效的基於電力線載波（電力線介質存在著大范圍變化的輸入阻抗，較強的干擾和信號衰減）的can通信系統提供了方便。 -
This thesis presents a single - terminal fault location technique that is used together with recloser. the technique takes advantage of reclosing of single - terminal recloser to eliminate the influence of the remote source impedance. a distributed parameter line model is used for the proposed algorithm, thus the technique can be used in hv transmission line
為了克服這一缺點，本文提出了與自動重合閘配合使用的單端故障測距方法，根據電力系統的運行特點，利用故障線路在試送電時自動重合閘的單端重合狀態來消除對端系統的影響，測距演算法建立在分佈參數模型基礎上，使其可應用於高壓輸電線路。 -
( 2 ) the distributed bst capacitor - loaded phase shifter was designed, of which the high impedance transmission line is finite ground coplanar wave - guide ( fgcpw )
（ 2 ）採用分散式電容負載型結構設計出毫米波薄膜介質移相器，其中的高阻傳輸線為有限寬度地共面波導。 -
After the analysis of some structures commonly used in dielectric phase shifter, a new structure named distributed capacitor - loaded phase shifter was carried out. it is comprised of a high - impedance transmission line periodically loaded with bst ( baxsr1 - xtio3 ) thin film capacitors
在對現有的幾種薄膜介質移相器結構進行分析的基礎上，提出了一種新型的分散式電容負載型薄膜介質移相器結構，它由高阻傳輸線和周期性負載的鈦酸鍶鋇薄膜電容構成。
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