Control of Brushless Doubly-Fed Reluctance Generators for Wind Energy Conversion Systems

Abstract

This paper presents the conceptual analysis, comparative simulation, and experimental evaluation of voltage and flux vector-oriented control of a promising low-cost brushless doublyfed reluctance generator (BDFRG) technology for variable-speed wind turbines with maximum power point tracking. The BDFRG has been receiving increasing attention because of the use of partially rated power electronics and the high reliability of brushless design, while offering performance competitive to its popular slipring counterpart, the doubly-fed induction generator. The development and viability of the two parameter-independent controllers have been validated on a custom-made BDFRG prototype using the maximum torque per inverter ampere strategy for the speed and loading conditions commonly encountered in wind power applications.

Optimal Design and Comparative Analysis of Different Configurations of Brushless Doubly Fed Reluctance Machine

“…These advantages give BDFRM an edge over other machines (3)- (5) . Many researchers have investigated this unusual machine (6)- (11) . Certain design aspects of BDFRM are addressed in (7) (8) and control through different PECs are discussed in (12) (13).…”

Control of a Dual-Stator Flux-Modulated Motor for Electric Vehicles

“…In particular, control strategies for BDFMs, such as direct torque and flux control [11], voltage vector-oriented control (VC) [12,13], and field-oriented control (FOC) [14,15], have been investigated. The FOC and VC schemes were compared in [15] and the advantages and disadvantages of the two control methods were presented. The structural diagram of the brushless, doubly-fed reluctance machine (BDFRM (G)) drive setup is depicted in Figure 2 [13].…”

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].…”

“…Similar studies to those conducted for the BDFIG [24]- [26] or DFIG [6] have also been done on the BDFRG(M) involving: scalar control [2], [23], vector control (VC) [1], [2], [5], [23], [27]- [29], direct torque and secondary flux (λ s ) [23], [30] or primary reactive power (Q) control (DTC) [31], direct power control (DPC) [32] and variable structure control [33]. The preliminary attributes in [2], [23], [33] are intellectually interesting but have been left unproven in practice.…”

“…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].…”