Analysis, modeling and control of doubly-fed induction by Petersson Andreas PDF

By Petersson Andreas

ISBN-10: 9172916001

ISBN-13: 9789172916005

Show description

Read or Download Analysis, modeling and control of doubly-fed induction generators for wind turbines PDF

Best analysis books

Get In-Vivo Magnetic Resonance Spectroscopy I: Probeheads and PDF

RF Probeheads 1. J. hyperlink, Faellanden, Switzerland The layout of Resonator Probes with Homogeneous Radiofrequency Fields 2. M. Schnall, Philadelphia, PA/USA Probes Tuned to a number of Frequencies for In-Vivo NMR RF Pulses three. P. C. M. van Zijl, Rockville, MD/USA; C. T. W. Moonen, Bethesda, MD/USA Solvent Suppression techniques for In Vivo Magnetic Resonance Spectroscopy four.

Download PDF by Israël César Lerman: Foundations and Methods in Combinatorial and Statistical

This e-book bargains an unique and large exploration of the basic tools in Clustering and Combinatorial info research, proposing new formulations and concepts inside of this very energetic box. With vast introductions, formal and mathematical advancements and genuine case stories, this ebook presents readers with a deeper realizing of the mutual relationships among those tools, that are essentially expressed with recognize to 3 aspects: logical, combinatorial and statistical.

Spectral Analysis of Growing Graphs: A Quantum Probability - download pdf or read online

This ebook is designed as a concise advent to the hot achievements on spectral research of graphs or networks from the perspective of quantum (or non-commutative) chance thought. the most issues are spectral distributions of the adjacency matrices of finite or limitless graphs and their restrict distributions for turning out to be graphs.

Additional resources for Analysis, modeling and control of doubly-fed induction generators for wind turbines

Sample text

Since it is difficult to measure the torque, it is most often controlled in an open-loop manner. Therefore, the q component reference current, iref Rq , ref can be determined from the reference torque, Te , as iref Rq Teref =− . 81), the approximation ψˆs ≈ Eg,nom /ω1 can be used. Fig. 12 shows a block diagram of the open-loop torque control scheme. Teref − 1 3np ψˆs iref Rq Fig. 12: Block diagram of the open-loop torque control. , with the bandwidth αc , should be set much faster than the speed dynamics, the speed can be controlled in cascade with the current.

Fig. 74) if all model parameters are assumed to be accurate. 76) This means that the above choice of Ra will force a change in the back EMF to be damped with the same bandwidth as the closed-loop current dynamics. 77) αc,min = (RR + Rs )/Lσ . u. is reasonable [40], corresponding to a rise time of 1 ms at a base frequency of 50 Hz. 74), with and without “active resistance”: Gr (ω) = |GEi (jω)|kR =1 = |GEi (jω)|kR =0 (RR + Rs )2 + ω 2 L2σ . 79) which shows that while the “active resistance” has little impact on high-frequency disturbances, the damping of low-frequency disturbances is significantly improved, since, typiαc Lσ .

The “active resistance” is used to increase the damping of disturbances and variations in the back EMF. 47 Similar approaches have been used for the squirrel-cage IG [18, 41]. How to choose the “active resistance” will be shown in next section. 69), the d and the q components of the rotor current will not be decoupled. In [46] it is stated that the influence of the decoupling term jω2 Lσ iR is of minor importance, since it is an order of magnitude smaller than the term jω2 Ψs . Nevertheless, here the d and q components of the rotor current will be decoupled, since for a DSP-based digital controller it is easy to implement.

Download PDF sample

Analysis, modeling and control of doubly-fed induction generators for wind turbines by Petersson Andreas


by Thomas
4.0

Rated 4.14 of 5 – based on 40 votes