Loss Estimation of Brushless Doubly-Fed Generator With Hybrid Rotor Considering Multiple Influence Factors

The brushless doubly fed generator (BDFG) has been a research focus of wind power generation due to its inherent promising features. Although it is important to consider the effect of losses on the design and analysis of the BDFG, there are a few related comprehensive studies. Moreover, a hybrid rotor is studied to improve the performance of BDFG, which brings greater challenges to the loss calculation. The aim of this paper is to propose the accuracy calculation methods of core loss and copper loss for the studied BDFG with hybrid rotor. The core loss calculation model which taken the influence of harmonics, alternating magnetization, rotating magnetization and two-dimensional magnetic property of material into account is proposed based on the analysis of the magnetic field characteristics. In order to calculate the copper loss considering the skin effect, the inductive current of the assisted cage bars which is difficult to obtain directly is calculated. The accuracy and correctness of the proposed approaches and models are validated by experimental results from a 25kW prototype BDFG with hybrid rotor. In addition, the proposed loss calculation method, especially the core loss calculation model, is also applicable to BDFG with other rotor structure which is operated by the magnetic field modulation mechanism.

[1]  Hashem Oraee,et al.  Calculation of Core and Stray Load Losses in Brushless Doubly Fed Induction Generators , 2014, IEEE Transactions on Industrial Electronics.

[2]  Gholamreza Arab Markadeh,et al.  Modeling and Dynamic Performance Analysis of Brushless Doubly Fed Induction Machine Considering Iron Loss , 2020, IEEE Transactions on Energy Conversion.

[3]  H. A. Zarchi,et al.  Modified steady‐state modelling of brushless doubly‐fed induction generator taking core loss components into account , 2019, IET Electric Power Applications.

[4]  Hashem Oraee,et al.  A novel rotor configuration for brushless doubly-fed induction generators , 2013 .

[5]  Zhe Chen,et al.  Overview of different wind generator systems and their comparisons , 2008 .

[6]  Wenping Cao,et al.  Optimized Power Error Comparison Strategy for Direct Power Control of the Open-Winding Brushless Doubly Fed Wind Power Generator , 2019, IEEE Transactions on Sustainable Energy.

[7]  Thomas A. Lipo,et al.  Rotor Pole Optimization of Novel Axial-Flux Brushless Doubly Fed Reluctance Machine for Torque Enhancement , 2016, IEEE Transactions on Magnetics.

[8]  Hashem Oraee,et al.  Generalized Vector Model for the Brushless Doubly-Fed Machine With a Nested-Loop Rotor , 2011, IEEE Transactions on Industrial Electronics.

[9]  Masato Enokizono,et al.  Loss Evaluation of Induction Motor by Using Magnetic Hysteresis Model , 2002 .

[10]  Yang Hu,et al.  Design and experimental analysis of a wound brushless doubly Fed machine based on a rotor with the reluctance effect , 2019 .

[11]  Masato Enokizono,et al.  Improvement of T-joint part constructions in three-phase transformer cores by using direct loss analysis with E&S model , 2000 .

[12]  Hao Wang,et al.  Research of a Novel Brushless Doubly-Fed Generator With Hybrid Rotor , 2016, IEEE Transactions on Applied Superconductivity.

[13]  P.J. Holik,et al.  Assessment of Losses in a Brushless Doubly-Fed Reluctance Machine , 2006, IEEE Transactions on Magnetics.

[14]  Fengge Zhang,et al.  Parameter Calculation and Analysis of a Novel Wind Power Generator , 2017, IEEE Transactions on Magnetics.

[15]  Min-Fu Hsieh,et al.  Design and Analysis of Brushless Doubly Fed Reluctance Machine for Renewable Energy Applications , 2016, IEEE Transactions on Magnetics.

[16]  Jianzhong Zhang,et al.  A Permanent Magnet Brushless Doubly Fed Generator With Segmented Structure , 2018, IEEE Transactions on Magnetics.

[17]  Jun Du,et al.  Core Loss Analysis and Calculation of Stator Permanent-Magnet Machine Considering DC-Biased Magnetic Induction , 2014, IEEE Transactions on Industrial Electronics.

[18]  Shuai Xu,et al.  A Brushless Doubly Fed Generator Based on Permanent Magnet Field Modulation , 2020, IEEE Transactions on Industrial Electronics.

[19]  Farzad Tahami,et al.  Investigation of Core Loss Effect on Steady-State Characteristics of Inverter Fed Brushless Doubly Fed Machines , 2014, IEEE Transactions on Energy Conversion.

[20]  D. G. Dorrell,et al.  Design and analysis of Brushless Doubly Fed Reluctance Machines , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[21]  B. Bai,et al.  A Complex-Valued Rotating Magnetic Property Model and Its Application to Iron Core Loss Calculation , 2014, IEEE Transactions on Magnetics.

[22]  Zhe Chen,et al.  Torque/Power Density Optimization of a Dual-Stator Brushless Doubly-Fed Induction Generator for Wind Power Application , 2017, IEEE Transactions on Industrial Electronics.

[23]  Marco Liserre,et al.  Overview of Multi-MW Wind Turbines and Wind Parks , 2011, IEEE Transactions on Industrial Electronics.

[24]  Fengge Zhang,et al.  Design and Performance Comparisons of Brushless Doubly Fed Generators With Different Rotor Structures , 2019, IEEE Transactions on Industrial Electronics.

[25]  David G. Dorrell,et al.  Saturation and Ducting Effects in a Brushless Doubly-Fed Reluctance Machine , 2013, IEEE Transactions on Magnetics.

[26]  Peter Tavner,et al.  Steady-state analysis and performance of a brushless doubly fed machine accounting for core loss , 2013 .