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

By Petersson Andreas

Show description

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

Best analysis books

Fatigue Testing and Analysis: Theory and Practice

This ebook is a precis of experimental and analytical innovations which are necessary to scholars and training engineers for accomplishing mechanical part layout and checking out for sturdiness. there's a critical desire for engineers to have an summary at the whole method of sturdiness checking out and reliability to bridge the space among basic fatigue learn and its toughness purposes.

Understanding Treatment Without Consent

In "Understanding therapy with out Consent", the authors research the paintings of the psychological future health Act fee (MHAC), verified to make sure the care and rights of individuals subjected to a few of the sections of the 1983 psychological wellbeing and fitness Act. The e-book emerges from a division of future health funded learn venture, which analysed the information held through the MHAC and knowledgeable the government's evaluation of the psychological healthiness Act.

Speech Act Classification: A Study in the Lexical Analysis of English Speech Activity Verbs

This ebook provides a brand new category of speech acts. it really is an regulate­ local to all formerly released classifications of speech acts. The type proposed this is in response to an intensive set of information, identify­ lyon all of the verbs designating linguistic actions and features thereof. A theoretically and methodologically justifiable technique is used to continue in a couple of steps from those information to the type.

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

Example text

6. Γ representation of the IG in stator coordinates. Superscript “s” indicates that the space vectors are referred to the reference frame of the stator of the DFIG. 37) where superscript s indicates stator coordinates. 39) vs stator voltage; Ψs stator flux; ΨR rotor flux; vR rotor voltage; stator current; Rs stator resistance; is RR rotor resistance; iR rotor current; ω1 synchronous frequency; ω2 slip frequency. 42) where LM is the magnetizing inductance, Lσ is the leakage inductance, and np is the number of pole pairs.

In [16] it was found that the DFIG system produced 60% more energy compared to a fixed-speed system. However, in this study the produced energy of the systems was found to be similar. The difference between the result here and in [16] is due to the different base assumptions used. Further, it was found in this investigation that there is a possibility to gain a few percentage units (approximately 2%) in energy using the DFIG system compared to the full variable-speed system. This can be compared to a gain of 20% for the DFIG system compared to the variable-speed system reported in [16].

In the first method, a set of variables is estimated or measured in one reference frame and then the variables are used in another reference frame to estimate the slip angle θ2 . Estimating the rotor currents from the flux and the stator currents can do this. In [15] the estimation of the rotor currents has been carried out in stator coordinates, while in [46, 68] it has been done in synchronous coordinates. The method will here be described in synchronous coordinates. 104) ˆM L where the stator current has been measured and transformed with the transformation angle θ1 ; see previous section for determination of this angle.

Download PDF sample

Rated 4.40 of 5 – based on 22 votes