結點阻抗 的英文怎麼說
中文拼音 [jiēdiǎnzǔkàng]
結點阻抗
英文
joint impedance-
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。The development of a visual short circuit software under ptcad2000 is presented in this paper, as well as the system structure, the definition of the data structure, the interface to ptcad2000, the conversion of the original wiring diagram of power network to calculable power network, the implement of three sequence network, the implement of impendence matrix and admittance matrix of power network considering the zero sequence mutual inductances among lines, and the implement of short circuit calculation by using computer
本文介紹了在ptcad2000平臺下短路電流可視化計算軟體的開發。介紹了軟體的系統結構、數據結構定義、與ptcad2000平臺的介面、電力系統原始接線圖轉成等值可計算網路、序網的生成、考慮零序互感線路阻抗時電網導納矩陣和阻抗矩陣的生成，以及故障點短路電流計算的計算機實現。Finally, the method of estimating power customer emission level based on binary linear regression is put forward, which make it a condition that harmonic emission is steady at the point of common coupling. combined with power system thevenin equivalent and customer norton equivalent, according to the principle of least squares method, the voltage that a customer ' s harmonic current begets at the point of common coupling can be estimated in the light of the plural correlation of network parameters
最後，提出了基於二元線性回歸的用戶諧波發射水平估計方法，該方法在假設公共聯接點諧波發射穩定的情況下，結合系統側戴維南等值與用戶側諾頓等值的電路圖，按照最小二乘法原理，利用電網各參數的復數關系推導關于系統側諧波阻抗的二元線性回歸方程，並根據諧波阻抗的估計值求取用戶諧波電流在公共聯四川大學碩士學位論文（ 2003 ）接點產生的電壓降。Water dielectric pulse power modulator has been widely applied because of its merits of high energy storage density, compactness, and capability to drive low impedance high power microwave sources. research for multi - pulse operation of high power spark gap switch with high current and comprehending its physical properties are the basis to study multi - pulse operation or repetitive operation of water dielectric pulse power modulator
水介質脈沖功率調制器具有儲能密度高，結構緊湊、與低阻抗微波源較好匹配的特點，因此得到廣泛的應用，但是受到高功率、大電流氣體開關的絕緣恢復的影響，水介質等低阻抗脈沖功率調制器的重復頻率運行或多脈沖運行受到較大的限制。Three - dimensionally braided structural composites have distinct structure that is fully integrated, continuously spatial fiber - network impregnated with ductile material. the new innovative materials have not plies as conventional composites have, and put an end once and all to low interlaminar strength showing in laminate materials. because of their enhanced stiffness and strength in the thickness direction, near - net - shape design and manufacturing, superior damage tolerance and specified aerospace function, the braided composites are gaining more and more attention of industry and academia
三維編織結構復合材料是完全整體、連續、多向的紡線（纖維束）的網路，充填以延性材料，這類新材料已失去通常復合材料的層合板概念，由此，層合板復合材料層間脆弱的致命弱點在編織結構復合材料中得到克服，所以編織結構復合材料具有高的強度和剛度（包括在厚度方向） ，接近實際形狀的製造，高的沖擊韌性、高的損傷阻抗，和按實際設計要求的特定的航空航天方面的使用功能，因而廣泛地受到工業界和學術界的關注。The methods above have been simulated using emtp and matlab, and the simulation results indicate that, ( 1 ) in the fault location method based on wavelet reconstruction, the influences of reflected waves from tee joints or resistance discontinuities except the fault point can be eliminated when the current difference between faulty phase and sound phase is used in fault location
本文利用emtp和matlab程序對上述方法進行了數值模擬，結果表明： （ 1 ）在本文所提出的基於小波重構的電纜故障測距方法中，利用健全相和故障相的電流差信號進行故障定位，能消除故障點之外其他阻抗不匹配點的反射波的影響。To characterize the local discontinuity due to the crack, a rotational spring model is proposed to model the crack, on the basis, a method for crack identification is presented in this paper, which makes use of the driving - point mechanical impedance characters of the cracked beam stimulated by harmonic force
為了描述由裂紋引起的梁中波傳播的不連續特性，引入彎曲彈簧模型來模擬裂紋，並在此基礎上提出了利用梁結構驅動點阻抗特性的裂紋損傷識別方法。This paper introduces several dielectric foil switches, analyzes their characteristics in respect of the output pulse shape, switch mechanism and output impedance etc
摘要介紹了國內外幾種絕緣薄膜開關，從開關的結構、對應的輸出方波波形和輸出阻抗等幾個方面進行了比較，分析了其各自的優缺點。Two design plans and structure charactristic of high impedance transformer are introduced. its charactristics are compared. its structure is analyzed
摘要介紹了高阻抗變壓器的結構特點及兩種結構的設計，並對其進行了性能比較和結構分析。The engendering source of traffic volumes and their general influential factors have been presented, and the situation of nowadays highway transportation has been discussed. according to the introduction of traffic distribution theory and classical assignment method, analysis of traffic flow path selection among cities and that of special influential factors for traffic flow on toll highways, initial analysis to the forming mechanism of traffic volume on road sections has been made, and a probability model for path selection has been set up with the maximum - utility theory and disaggregating model. detailed analysis to impedances on road sections and their functions ( especially to three main composing factors of the impedances as cost of time, transport and toll and to the functional relations with traffic loads ) was made, at the same time, the relative cost calculating model was set up on the basis of the state - of - art achievements in both international and national researches
主要研究內容包括：交通量的產生根源及一般影響因素分析和當前公路運輸地位討論；從交通分配理論及經典配流方法著手，通過分析城市間交通流路徑選擇行為和收費公路路段交通量特殊影響因素，初步提出路段交通量的形成機理，並採用效用極大原理和非集結模型理論（ disaggregationmodel ） ，建立用戶出行路徑選擇概率模型；對路段阻抗及路阻函數（尤其對行程時間費用、車輛營運費用和道路收費這三個構成路段阻抗的主要因素及其與交通負荷間的函數關系）進行較為詳盡的分析，並以現階段國內外較為先進的研究成果為依據建立相應的成本測算模型，其中，特別提出了兩種確定客貨車輛時間價值的分析方法；離散分析法和時間-費率轉換法，後者是在目前基礎調查、統計數據資料不夠齊全的現實下提出的一種確定道路系統內務車型時間價值的較為實用的新方法；對我國公路收費政策的背景和理論、實踐依據及費率的各種影響因素進行重點分析；從數學的角度證明合理費率的存在性，並以最優化理論為基礎，建立在普通收費公路和擁擠路段交通調控型收費公路兩種模式下合理費率的計算模型等。Compared with the similar research results, the weighted control ic here has the following characteristics : ( 1 ) the circuit structure is simpler ; ( 2 ) the chip ' s fabrication is compatible with standard cmos process ; ( 3 ) n - mosfets with high w / l ratio and short channels are used for weighting and output to reduce the insertion loss ; ( 4 ) the weighting factor varies in a relatively wide range with the controlling signals ; ( 5 ) input and output impedance approach 50 in low frequency ( e. g. 50mhz ), while in higher frequency they slightly deviate from 50, hence the energy reflection lower than 0. 1 ; ( 6 ) it completes the functions of sampling, weighting, controlling and summing of high frequency analog signals
它的加權控制電路與已報道的相關電路相比具有如下特點：電路結構簡單；製造工藝與普通cmos工藝兼容：短溝道，高寬長比的nmos晶體管具有低的通導電阻，將其作為加權、輸出器件可降低由電路引起的插入損耗；改變加權信號，可實現權值在較大范圍內的連續變化；輸入、輸出阻抗在低頻（如50mhz ）下接近50 ，而在高頻下略有偏離50 ，但反射系數均低於0 . 1 ；實現了對高頻信號的取樣、加權、控制、疊加功能的迭加。This paper gained correlation conclusion about linear inversion pass through large numbers of test calculates, put emphasis upon the discussion of run parameters " acquired value extent about this algorithm is applied to wave impedance, gained the reference acquired value extent of run parameters
通過大量的試算，給出了線性反演的相關結論，重點討論了採用本文編制的遺傳演算法用於波阻抗反演的運行參數的取值范圍，並由試算結果給出了運行參數的參考取值范圍。The electrical field integral equation ( efie ) and the rwg basis function are used. the impedance matrix is decomposed by the row, stored in distributed memory of the nodes. besides, the processors exchange messages through the mpi communication library
採用的是電場積分方程（ efie ） ，用rwg基函數離散目標，阻抗矩陣數據按行分解，分佈存儲于各個計算節點中，通信通過mpi通信庫實現，數值結果表明了該并行程序的高效性和正確性。Firstly, object - oriented programming method and relation database technology are used to realize protective information management, with a multiple tires " client / server architecture. using it, the technical staffs can check all kinds of reports, fault waves and setting values of protection. secondly, based on protective principles of ta21 series protection devices, protective function is simulated by using object - oriented technology
首先，本文將面向對象方法和關系數據庫技術結合起來，採用psmis的多層客戶?服務器體系結構實現對保護信息的管理，以便供電段技術人員查看保護裝置的整定值、各種報告、故障錄波（系統不僅能顯示波形，還能動態顯示波形每一點的峰值、有效值、相位，甚至阻抗值及阻抗角、諧波含量等） 。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。Special - shaped column frame, its seismic behavior is studied and a new dissipating - seismic - energy structure, r. c. special - shaped column frame with viscoelastic friction damper ( f - ved ) is proposed and studied. a three - dimension solid element model is established for a special - shaped column frame to study its seismic behavior and time history responses under earthquake, some conclusion is drawn about its characteristics of force and displacement under horizontal earthquake action
為了進一步推廣和擴大異型柱框架結構的應用范圍，本文對異型柱框架結構在水平地震作用下的受力特點和抗震性能進行了研究，並提出在異型柱框架中設置粘彈性?摩擦阻尼器（ viscoelastic - frictiondamper ，簡稱f - ved ） ，對其進行了水平地震作用下的減震控制研究。Because the harmonics in tangyin substation are primarily from electric traction loads, this paper gives the structures of several main locomotive models and general harmonics they produce. the harmonics produced by electric locomotive have a characteristic that their range and phase are both dispersive. this paper also analyzes the impedance - matching balance transformer ' s structure and harmonics injected into the power system at its primary side, and sums up the characteristics of the harmonics from electric traction loads in the tangyin traction substation
鑒于湯陰變電站的諧波主要來自電力牽引負荷，本文列舉了電力機車幾種主要車型的結構以及它們產生諧波的概況，得出了電力機車的各次諧波電流幅值和相角具有較大分散性的特點。針對湯陰牽引變電站的牽引變壓器，分析了阻抗匹配平衡變壓器的結構及其高壓側注入電網的諧波，推導了有關計算公式。通過理論分析並結合湯牽線的實測諧波數據，歸納了電力牽引負荷注入湯陰變電站的諧波的特點。Abstract : a microprocessor - based adaptive voltage instantaneous trip protection is proposed and analysed. the voltage setting can be automatically online calculated and determined according to current operation condition of power system and the protection zone is enlarged. as a result, the adaptive voltage instantaneous trip protection is more superior than the same conventional ones
文摘:為了克服傳統電壓速斷保護的動作性能受運行方式變化影響的缺點，提出了利用在線實時計算系統電源側綜合阻抗的方法實現微機式自適應電壓速斷保護，分析結果表明它比傳統的電壓速斷保護有著非常明顯的優越性。By analyzing the refraction 、 reflection process of fault transient current traveling wave of high voltage and characteristics of refraction 、 reflection coefficient systematically, a new fault location method of single ended traveling wave is presented. it can not only identify the reflection wave for fault location efficiently, but also not be affected by the structure and length of line. fault earthed resistance 、 fault type 、 system impedance and can locate fault in adjacent areas accurately
論文深入地分析了高壓線路故障暫態電流行波的波折、反射過程以及折、反射系數的特點，提出了新的單端行波故障測距方法，它不僅能夠有效地識別出測距所用的反射波，而且幾乎不受線路結構、長短、故障接地電阻、故障類型、系統阻抗的影響，在近區仍可以準確地進行測距；同時模擬阻波器的特徵，設計了低通數字濾波器，對通過了低通數字濾波器的暫態故障電流行波再次進行小波分析，並利用本文提出的單端行波故障測距方法進行故障定位，結論是所提出的測距方法在實際應用中仍是有效的。The physical process of generating quasi - isentropic compression on target via flier - plates with graded wave impedance might be considered as the successive overlap of a series of small shock loading waves generated by the transition layers in the flier - plate. as a result, the p - v curve of the target was a quasi - isentropic compression curve, which consisted of small hugoniot curves ( similar to isentropic curves ) from different original states, and was located between the hungoniot curve and isentropic curve but closer to the latter
波阻抗梯度飛片對靶板的壓縮過程是一系列弱沖擊加載波相繼發生作用疊加的結果，靶板由此獲得的p - v線是一組通過不同起始狀態點的hugoniot線的連線，這條連線可以近似看作是由小段小段等熵線連接而成的準等熵線。分享友人