A new rotor speed observer for stand-alone brushless doubly-fed induction generators

Brushless doubly-fed induction generator (BDFIG) is a new type of ac induction machine and can be used for both grid-connected and stand-alone power generation. The conventional control methods for the BDFIG almost all rely on the encoder, which brings many limitations in terms of cost, complexity, reliability, and so on. This paper presents a new rotor speed observer (RSO) for the encoderless operation of the stand-alone BDFIG, which is based on a rotor position phase-locked loop (PLL) and a second-order generalized integrator (SOGI) and independent of any other machine parameters except for the pole pairs. Comprehensive experiments are also presented to validate the effectiveness of the proposed RSO.

[1]  Y. Liu,et al.  Operation control of the brushless doubly-fed machine for stand-alone ship shaft generator systems , 2015, 2015 IEEE International Conference on Industrial Technology (ICIT).

[2]  Teng Long,et al.  Dynamic Control of the Brushless Doubly Fed Induction Generator Under Unbalanced Operation , 2013, IEEE Transactions on Industrial Electronics.

[3]  Javier Poza,et al.  Direct torque control design and experimental evaluation for the brushless doubly fed machine , 2011 .

[4]  Xin Wang,et al.  Indirect Stator-Quantities Control for the Brushless Doubly Fed Induction Machine , 2014, IEEE Transactions on Power Electronics.

[5]  S.-K. Chung,et al.  Phase-locked loop for grid-connected three-phase power conversion systems , 2000 .

[6]  Shiyi Shao,et al.  Low-Cost Variable Speed Drive Based on a Brushless Doubly-Fed Motor and a Fractional Unidirectional Converter , 2012, IEEE Transactions on Industrial Electronics.

[7]  Ke Chen,et al.  Control Design of the Brushless Doubly-Fed Machines for Stand-Alone VSCF Ship Shaft Generator Systems , 2016 .

[8]  Marco Liserre,et al.  New Positive-sequence Voltage Detector for Grid Synchronization of Power Converters under Faulty Grid Conditions , 2006 .

[9]  D.G. Dorrell,et al.  Sensorless Control of Brushless Doubly-Fed Reluctance Machines using an Angular Velocity Observer , 2007, 2007 7th International Conference on Power Electronics and Drive Systems.

[10]  Wenping Cao,et al.  A New Sensorless Speed Control Scheme for Doubly Fed Reluctance Generators , 2016, IEEE Transactions on Energy Conversion.

[11]  Wu Ai,et al.  Control design and experimental verification of the brushless doubly-fed machine for stand-alone power generation applications , 2016 .

[12]  George Ellis,et al.  Control System Design Guide , 2012 .

[13]  Joseph Warrington,et al.  Practical deployment of the Brushless Doubly-Fed Machine in a medium scale wind turbine , 2009, 2009 International Conference on Power Electronics and Drive Systems (PEDS).

[14]  P. C. Roberts,et al.  Performance of the bdfm as a generator and motor , 2005 .

[15]  F. Blaabjerg,et al.  Flexible control of small wind turbines with grid failure detection operating in stand-alone and grid-connected mode , 2004, IEEE Transactions on Power Electronics.

[16]  Wei Xu,et al.  Performance Analysis of a Stand-alone Brushless Doubly-fed Induction Generator Using a New T-type Steady-state Model , 2017 .

[17]  Shiyi Shao,et al.  Stator-Flux-Oriented Vector Control for Brushless Doubly Fed Induction Generator , 2009, IEEE Transactions on Industrial Electronics.