By Leigh Page
Leopold is overjoyed to submit this vintage booklet as a part of our huge vintage Library assortment. the various books in our assortment were out of print for many years, and for that reason haven't been available to most of the people. the purpose of our publishing application is to facilitate quick entry to this sizeable reservoir of literature, and our view is this is an important literary paintings, which merits to be introduced again into print after many a long time. The contents of the majority of titles within the vintage Library were scanned from the unique works. to make sure a top quality product, every one identify has been meticulously hand curated via our employees. which means now we have checked each web page in each name, making it hugely not going that any fabric imperfections – comparable to negative photo caliber, blurred or lacking textual content - stay. whilst our employees saw such imperfections within the unique paintings, those have both been repaired, or the identify has been excluded from the Leopold vintage Library catalogue. As a part of our on-going dedication to providing worth to the reader, in the e-book we now have additionally supplied you with a hyperlink to an internet site, the place you could obtain a electronic model of this paintings at no cost. Our philosophy has been guided via a wish to give you the reader with a e-book that's as shut as attainable to possession of the unique paintings. we are hoping that you'll get pleasure from this excellent vintage paintings, and that for you it turns into an enriching adventure. if you'd like to benefit extra in regards to the Leopold vintage Library assortment please stopover at our site at www.leopoldclassiclibrary.com
Read or Download An introduction to electrodynamics from the standpoint of the electron theory PDF
Similar introduction books
This publication addresses the shortcoming of educational and sensible study into company venturing via analyzing the function of this job as either a kind of huge firm-small company collaboration and instead resource of fairness finance for small corporations. those concerns are explored via surveys of self sustaining fund managers, coporate executives and technology-based company administrators.
`. .. well-written, with many advancements of identified effects and present proofs. The researchers and the graduate scholars will use this booklet either as a graduate textbook and as an invaluable reference. .. 'Zentralblatt MATH, 929 (2000)
Unmanned aerial autos (UAVs) were extensively followed within the army international over the past decade and the good fortune of those army purposes is more and more riding efforts to set up unmanned airplane in non-military roles. advent to UAV structures, 4th edition provides a finished advent to all the parts of an entire Unmanned airplane method (UAS).
- An Introduction to Nonlinearity in Control Systems
- Getting on the Money Track
- Streetsmart Guide to Valuing a Stock
- Hedge Funds Demystified
- Information Systems Engineering: An Introduction
Extra resources for An introduction to electrodynamics from the standpoint of the electron theory
VsЈ Є␦sЈ). Controlling one parameter (voltage magnitude or its phase angle) using a power flow controller (PFC) affects both the active and reactive power flows (Pr and Qr) in the line simultaneously. The key to regulate the active and reactive power flows (Pr and Qr) so they become a particular pair of values is to control the sending-end voltage to a specific magnitude (VsЈ) and phase angle (␦sЈ). , Vs Є␦s) as shown in Figure 2-2a. For point-to-point transfer of power between two isolated networks or interconnection of two transmission lines with different voltages or 18 POWER FLOW CONTROL CONCEPTS Ps , Q s Vs's Ps' , Q s' Pr , Q r VX I X Vs Vs' Vr (a) Ps' , Q s' Pr , Q r VX X X TIE E I Vs' Vr (b) Figure 2-2.
13 14 POWER FLOW CONTROL CONCEPTS Psn, Qsn Prn, Qrn VXn I I X VXn Vs V1 Vs I qs 90 I Vr Vm V2 Vs I ο Vr δ Ids I I qr Vr Idr Figure 2-1. Simple power transmission system and the related phasor diagrams. 1 15 THEORY where VV An = s r X (2-5) The natural reactive power flow at the sending end is ( ( ) ) Qsn = Vs I sin δ s − θ I = Vs I sin −θI = −Vs I sin θI (2-6) Then equations 2-2b and 2-6 can be combined as ⎛V ⎞ Q = A ⎜ s − cos δ ⎟ sn n ⎜V ⎟⎠ ⎝ r (2-7) where An is given in equation 2-5. , ␦r = 0°), the current through the transmission line is I= VXn V ∠δ − Vr ∠ 0° Vs cos δ + jVs sin δ − Vr = s = jX jX jX V sin δ V − Vs cos δ = s + j r = I ∠θ I X X or I = I cos θ I + jI sin θ I (2-1) V sin δ I cos θ I = s X (2-9a) V − Vs cos δ I sin θ I = r X (2-9b) where and 16 POWER FLOW CONTROL CONCEPTS The natural active power flow at the receiving end is ( ( )= Vr Icos θI ) Prn = Vr I cos δ r − θ I = Vr I cos −θ I (2-10) Then equations 2-9a and 2-10 can be combined as Prn = An sin δ (2-11) where An is given in equation 2-5.
The compensating voltage in the PAR is in quadrature (+90° or –90°) with the line voltage and, therefore, regulates the phase angle of the transmission line voltage. The ST creates a series compensating voltage that is variable in magnitude and phase angle and can control the transmission line voltage in both magnitude and phase angle in order to achieve independent control of active and reactive power flows in the line. This compensating voltage may be thought of as two orthogonal compensating voltages of separate autotransformer and PAR.