Modelling, Analysis, and Control Aspects of
a Rotating Power Electronic
Brushless Doubly-Fed Generator
Naveed ur Rehman Ma...
NAVEED UR REHMAN MALIK, KTH 2
Outline
 Different topologies
 DFIG with slip rings
 Introduce RPE-BDFIG
 Dynamic model ...
NAVEED UR REHMAN MALIK, KTH 3
Existing Topologies
Full-Scale Converter Fractional-Rated Converter
NAVEED UR REHMAN MALIK, KTH 4
Generator with Full-Scale Converter
Advantages
 More rugged and reliable
 Squirrel-cage in...
NAVEED UR REHMAN MALIK, KTH 5
Slip-Ring Doubly-Fed Induction Generator
Advantages
 Smaller power rating of the
converter ...
NAVEED UR REHMAN MALIK, KTH 6
Most famous topology in the family of wind generators
Slip-Ring Doubly-Fed Induction Generat...
Carbon Brushes
 Carbon brushes are replaced
every few months
 Carbon dust is a problem in the
nacelle
 Sparking between...
NAVEED UR REHMAN MALIK, KTH 8
Rotating Power Electronic Brushless
Doubly-Fed Induction Generator
NAVEED UR REHMAN MALIK, KTH 9
Rotating Power Electronic Brushless
Doubly-Fed Induction Generator
Modes of Operation
 Supe...
Advantages
 Smaller converter due to
limited-speed-range
 Lower maintenance cost
 Lower EMI
 Cost-effective
Disadvanta...
 Steady-state model
 dq dynamic model
NAVEED UR REHMAN MALIK, KTH 11
Modelling the RPE-BDFIG
NAVEED UR REHMAN MALIK, KTH
12
Dynamic Model of the RPE-BDFIG
DFIG stator DFIG rotor Exciter rotor
NAVEED UR REHMAN MALIK, KTH 13
Closed-Loop Current Control of the RPE-BDFIG
 Grid flux orientation
 Phase Locked-Loop (P...
NAVEED UR REHMAN MALIK, KTH 14
Experimental Setup
NAVEED UR REHMAN MALIK, KTH 15
Experimental Setup
NAVEED UR REHMAN MALIK, KTH 16
NAVEED UR REHMAN MALIK, KTH 17
Experimental Results
NAVEED UR REHMAN MALIK, KTH 18
Generated Power
NAVEED UR REHMAN MALIK, KTH 19
Efficiency
NAVEED UR REHMAN MALIK, KTH 20
Variable Reactive Power Operation
0.59-ind 0.90-cap
6 kW power and 1600 rpm
NAVEED UR REHMAN MALIK, KTH 21
Variable Reactive Power Operation
6 kW power
NAVEED UR REHMAN MALIK, KTH 22
Synchronous Operation
7 kW power
PF=0.65-ind
NAVEED UR REHMAN MALIK, KTH 23
Dynamic Performance
1750 rpm
NAVEED UR REHMAN MALIK, KTH 24
LVRT of RPE-BDFIG
 LVRT investigation
 Symmetrical and unsymmetrical voltage dips
 Used ...
NAVEED UR REHMAN MALIK, KTH 25
Conclusions
 Appropriate rotor voltage available from the exciter
 Stable operation
 Sli...
NAVEED UR REHMAN MALIK, KTH 26
Thank you
of 26

Present_PhD_ Naveed_2015

Published on: Mar 4, 2016
Source: www.slideshare.net


Transcripts - Present_PhD_ Naveed_2015

  • 1. Modelling, Analysis, and Control Aspects of a Rotating Power Electronic Brushless Doubly-Fed Generator Naveed ur Rehman Malik Department of Electrical Energy Conversion naveed.malik@ee.kth.se
  • 2. NAVEED UR REHMAN MALIK, KTH 2 Outline  Different topologies  DFIG with slip rings  Introduce RPE-BDFIG  Dynamic model of the RPE-BDFIG  Closed-loop current control of the RPE-BDFIG  Experimental setup  Results  Conclusions
  • 3. NAVEED UR REHMAN MALIK, KTH 3 Existing Topologies Full-Scale Converter Fractional-Rated Converter
  • 4. NAVEED UR REHMAN MALIK, KTH 4 Generator with Full-Scale Converter Advantages  More rugged and reliable  Squirrel-cage induction generator  Direct-drive (permanent magnet)  Lower maintenance costs  Better low-voltage ride-through Disadvantages  Larger size of the converter  Higher cost  Larger filters
  • 5. NAVEED UR REHMAN MALIK, KTH 5 Slip-Ring Doubly-Fed Induction Generator Advantages  Smaller power rating of the converter due to limited speed range  Cost effective Disadvantages  High maintenance costs due to slip rings/brushes  Brushes limit the generator size  EMI can be troublesome
  • 6. NAVEED UR REHMAN MALIK, KTH 6 Most famous topology in the family of wind generators Slip-Ring Doubly-Fed Induction Generator
  • 7. Carbon Brushes  Carbon brushes are replaced every few months  Carbon dust is a problem in the nacelle  Sparking between the brushes and slip rings NAVEED UR REHMAN MALIK, KTH 7 SOURCE: http://www.engineersparadise.com/sixcms/ media.php/1463/Schleifringeinheit.jpg
  • 8. NAVEED UR REHMAN MALIK, KTH 8 Rotating Power Electronic Brushless Doubly-Fed Induction Generator
  • 9. NAVEED UR REHMAN MALIK, KTH 9 Rotating Power Electronic Brushless Doubly-Fed Induction Generator Modes of Operation  Super-synchronous  Sub-synchronous
  • 10. Advantages  Smaller converter due to limited-speed-range  Lower maintenance cost  Lower EMI  Cost-effective Disadvantages  Larger rotating mass  New technology NAVEED UR REHMAN MALIK, KTH 10 Rotating Power Electronic Brushless Doubly-Fed Induction Generator
  • 11.  Steady-state model  dq dynamic model NAVEED UR REHMAN MALIK, KTH 11 Modelling the RPE-BDFIG
  • 12. NAVEED UR REHMAN MALIK, KTH 12 Dynamic Model of the RPE-BDFIG DFIG stator DFIG rotor Exciter rotor
  • 13. NAVEED UR REHMAN MALIK, KTH 13 Closed-Loop Current Control of the RPE-BDFIG  Grid flux orientation  Phase Locked-Loop (PLL)  Two current controllers  One each for the DFIG and exciter rotor converter  Speed controller  DC-link voltage controller
  • 14. NAVEED UR REHMAN MALIK, KTH 14 Experimental Setup
  • 15. NAVEED UR REHMAN MALIK, KTH 15 Experimental Setup
  • 16. NAVEED UR REHMAN MALIK, KTH 16
  • 17. NAVEED UR REHMAN MALIK, KTH 17 Experimental Results
  • 18. NAVEED UR REHMAN MALIK, KTH 18 Generated Power
  • 19. NAVEED UR REHMAN MALIK, KTH 19 Efficiency
  • 20. NAVEED UR REHMAN MALIK, KTH 20 Variable Reactive Power Operation 0.59-ind 0.90-cap 6 kW power and 1600 rpm
  • 21. NAVEED UR REHMAN MALIK, KTH 21 Variable Reactive Power Operation 6 kW power
  • 22. NAVEED UR REHMAN MALIK, KTH 22 Synchronous Operation 7 kW power PF=0.65-ind
  • 23. NAVEED UR REHMAN MALIK, KTH 23 Dynamic Performance 1750 rpm
  • 24. NAVEED UR REHMAN MALIK, KTH 24 LVRT of RPE-BDFIG  LVRT investigation  Symmetrical and unsymmetrical voltage dips  Used E.oN grid code standards  Two techniques used  PRN  DVC
  • 25. NAVEED UR REHMAN MALIK, KTH 25 Conclusions  Appropriate rotor voltage available from the exciter  Stable operation  Slip power recovery  Variable reactive power operation  Stable operation at synchronous speed
  • 26. NAVEED UR REHMAN MALIK, KTH 26 Thank you

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