Control of doubly-fed reluctance generators for wind power applications

Abstract

a b s t r a c tThe paper deals with flux and voltage vector oriented control of a transpiring brushless doubly-fed reluctance generator (BDFRG) technology for grid-connected wind turbines. The BDFRG features the low operation & maintenance costs by using a fractional inverter, and offers the high reliability of brushless structure at competitive performance to its popular slip-ring companion, the doubly-fed induction generator (DFIG). The relative experimental results for the two parameter independent speed and reactive power control algorithms have successfully verified the simulation studies on a custom-built machine for various loading profiles.

Encoderless flux vector oriented control of brushless doubly-fed reluctance generators

“…2 leads to inherently decoupled control of T e and Q through i sq and i sd by removing the problematic VOC cross-coupling terms from (7) and (8). If left uncompensated, the latter can severely deteriorate the VOC response quality, particularly with smaller machines, as experimentally verified in [27]- [30]. The FOC approach is therefore more generic and applicable to a range of machine sizes from this point of view.…”

“…Significant contributions to the early VOC research [17] have been recently made with the comparative development and comprehensive practical studies of the two robust VOC and FOC techniques for the adjustable speed BDFRM (e.g. motoring) [27], [28] and the BDFRG [29], [30] under both constant [29] and variable loading conditions [27], [28], [30]. Similar realistic computer simulations of WECS using a 2 MW BDFRG design from [7] have been documented in [8].…”

Bidirectional Tracking Robust Controls for a DC/DC Buck Converter‐DC Motor System

“…In that direction, the different forms of electrical conversion result very important in the energy processing. Thus, the appropriate supply of multiple applications of the new energy forms is achieved [5][6][7][8][9][10]. In such applications, some involving motion generations are found whose operation is reduced to the design of drivers for motors (see [11,12]).…”

A New Sensorless Speed Control Scheme for Doubly Fed Reluctance Generators

“…The theoretical considerations of the VC concept in [2], [23] have not been supported by true measurements. Further efforts and important practical advances have been made in [27]- [29] with a comparative performance analysis of the two robust VOC and FOC methods for the small BDFRM [27] and the BDFRG [28], [29], [34] under both speed independent [28], [34] and variable loading conditions [27], [29], [34]. Similar, but computer simulation, VC studies for a 2 MW BDFRG wind turbine have been published in [5].…”

“…As such, it has been intensively investigated for commercial DFIGs or SGs [6] as well as the emerging BDFIG [24]- [26] and BDFRG [1], [2], [5], [23], [27]- [29], [34] substitutes. A VOC algorithm for motoring (BDFRM) and generating (BDFRG) regimes of the machine has been firstly proposed, simulated and implemented in [1].…”