Within this book the fundamental concepts associated with the topic of power electronic control are covered alongside the latest equipment and devices, new application areas and associated computer-assisted methods. *A practical guide to the control of reactive power systems *Ideal for postgraduate and professional courses *Covers the latest equipment and computer-aided analysis
標簽: power electronic electrical system
上傳時間: 2015-02-20
上傳用戶:12345654321
Includes setup, expansion, and troubleshooting information for your Mac Pro computer
標簽: Mac Pro
上傳時間: 2015-03-24
上傳用戶:wdl1127
PSCAD/EMTDC是加拿大馬尼托巴高壓直流研究中心出品的一款電力系統電磁暫態仿真軟件,PSCAD(Power Systems Computer Aided Design)是用戶界面,EMTDC(Electromagnetic Transients including DC)是內部程序。 EMTDC最初代表直流暫態,是一套基于軟件的電磁暫態模擬程序。Dennis Woodford博士于1976年在加拿大曼尼托巴水電局開發完成了EMTDC的初版,編寫這個程序的原因是因為當時現存的研究工具不能夠滿足曼尼托巴電力局對尼爾遜河高壓直流工程進行強有力和靈活的研究的要求。自此之后程序被不斷開發,至今已被廣泛地應用在電力系統許多類型的模擬研究,其中包括交流研究,雷電過電壓和電力電子學研究。EMTDC開始時在大型計算機上使用。然后在1986年被移植到Unix系統和以后的PC機上。 PSCAD代表電力系統計算機輔助設計,PSCAD的開發成功,使得用戶能更方便地使用EMTDC進行電力系統分析,使電力系統復雜部分可視化成為可能,而且軟件可以作為實時數字仿真器的前置端。可模擬任意大小的交直流系統。PSCAD V1 1988年首先在阿波羅工作站上使用,然后大約在1995年PSCAD V2開始應用。PSCAD V3以PC Windows作為平臺,在1999年面世。目前最新版本的是PSCAD V4.2.1。 用戶可以通過調用隨EMTDC 主程序一起提供的庫程序模塊或利用用戶自己開發的元部件模型有效地組裝任何可以想象出的電力系統模型和結構。EMTDC 的威力之一是可以較為簡單地模擬復雜電力系統, 包括直流輸電系統和其相關的控制系統。 采用 PSCAD/EMTDC 進行的典型模擬研究包括: ? 一般的交流電力系統電磁暫態研究 ? 直流輸電結構和控制 ? FACTS(靈活交流輸電系統)元部件模型 ? 由于故障、斷路器操作或雷電沖擊引起的電力系統的過電壓研究 ? 絕緣配合研究 ? 諧波相互影響研究 ? 靜止補償器研究 ? 非線性控制系統研究 ? 變壓器飽和研究, 如鐵磁振蕩和鐵芯飽和不穩定性研究 ? 同步發電機和感應電動機的扭矩效應和自勵磁研究 ? 陡前波分析 ? 研究當一臺多軸系發電機與串補線路或電力電子設備相互作用時的次同步諧振現象 ? 向孤立負荷送電 電力系統數字仿真實驗室使用PSCAD/EMTDC主要進行一般的交流電力系統電磁暫態研究,進行簡單和復雜電力系統的故障建模及故障仿真,分析電力系統故障電磁暫態過程。
標簽: PSCAD實驗指導教程
上傳時間: 2016-02-16
上傳用戶:xixi略
Combinatorial Preconditioners and Multilevel Solvers for Problems in Computer Vision and Image Processing
標簽: image processing
上傳時間: 2016-03-28
上傳用戶:hzcloudy
CAD(Computer Aided Design)誕生于60年代,是美國麻省理工大學提出了交互式圖形學的研究計劃,由于當時硬件設施的昂貴,只有美國通用汽車公司和美國波音航空公司使用自行開發的交互式繪圖系統。計算機輔助設計(CAD-Computer Aided Design)指利用計算機及其圖形設備幫助設計人員進行設計工作。 平面繪圖:能以多種方式創建直線、圓、橢圓、多邊形、樣條曲線等基本圖形對象。 繪圖輔助工具:提供了正交、對象捕捉、極軸追蹤、捕捉追蹤等繪圖輔助工具。正交功能使用戶可以很方便地繪制水平、豎直直線,對象捕捉可 幫助拾取幾何對象上的特殊點,而追蹤功能使畫斜線及沿不同方向定位點變得更加容易。 編輯圖形:CAD具有強大的編輯功能,可以移動、復制、旋轉、陣列、拉伸、延長、修剪、縮放對象等。 標注尺寸:可以創建多種類型尺寸,標注外觀可以自行設定。 書寫文字:能輕易在圖形的任何位置、沿任何方向書寫文字,可設定文字字體、傾斜角度及寬度縮放比例等屬性。 圖層管理功能:圖形對象都位于某一圖層上,可設定圖層顏色、線型、線寬等特性。 三維繪圖:可創建3D實體及表面模型,能對實體本身進行編輯。 網絡功能:可將圖形在網絡上發布,或是通過網絡訪問AutoCAD資源。 數據交換 :提供了多種圖形圖像數據交換格式及相應命令。
上傳時間: 2016-03-29
上傳用戶:594551562
Computational models are commonly used in engineering design and scientific discovery activities for simulating complex physical systems in disciplines such as fluid mechanics, structural dynamics, heat transfer, nonlinear structural mechanics, shock physics, and many others. These simulators can be an enormous aid to engineers who want to develop an understanding and/or predictive capability for complex behaviors typically observed in the corresponding physical systems. Simulators often serve as virtual prototypes, where a set of predefined system parameters, such as size or location dimensions and material properties, are adjusted to improve the performance of a system, as defined by one or more system performance objectives. Such optimization or tuning of the virtual prototype requires executing the simulator, evaluating performance objective(s), and adjusting the system parameters in an iterative, automated, and directed way. System performance objectives can be formulated, for example, to minimize weight, cost, or defects; to limit a critical temperature, stress, or vibration response; or to maximize performance, reliability, throughput, agility, or design robustness. In addition, one would often like to design computer experiments, run parameter studies, or perform uncertainty quantification (UQ). These approaches reveal how system performance changes as a design or uncertain input variable changes. Sampling methods are often used in uncertainty quantification to calculate a distribution on system performance measures, and to understand which uncertain inputs contribute most to the variance of the outputs. A primary goal for Dakota development is to provide engineers and other disciplinary scientists with a systematic and rapid means to obtain improved or optimal designs or understand sensitivity or uncertainty using simulationbased models. These capabilities generally lead to improved designs and system performance in earlier design stages, alleviating dependence on physical prototypes and testing, shortening design cycles, and reducing product development costs. In addition to providing this practical environment for answering system performance questions, the Dakota toolkit provides an extensible platform for the research and rapid prototyping of customized methods and meta-algorithms
標簽: Optimization and Uncertainty Quantification
上傳時間: 2016-04-08
上傳用戶:huhu123456
EECS150-Digital Design Lecture 1 - Introduction Electrical Engineering and Computer Sciences University of California, Berkeley
標簽: lec01-intro 接口
上傳時間: 2016-04-08
上傳用戶:sidewen666
Fiddler is a free web debugging tool which logs all HTTP(S) traffic between your computer and the Internet. Inspect traffic, set breakpoints
上傳時間: 2016-06-03
上傳用戶:ttry
cv 是computer vision,opencv是開發的計算機視覺處理算法。
標簽: 計算機視覺的第一本書
上傳時間: 2016-09-25
上傳用戶:fly_1797
Coding the Matrix _ Linear Algebra through Computer Science Applications 著名線性代數和矩陣課程的課本,亞馬遜銷量第一
上傳時間: 2016-11-14
上傳用戶:kitool