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Research Output 2000 2019

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Article
2011
895 Citations (Scopus)

Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters

Tu, Q., Xu, Z. & Xu, L., Jul 2011, In : IEEE Transactions on Power Delivery. 26, 3, p. 2009-2017 9 p.

Research output: Contribution to journalArticle

Frequency modulation
Switching frequency
Controllers
Electric potential
Modulation
2010
82 Citations (Scopus)

Coordinated control of DFIG and FSIG-based wind farms under unbalanced grid conditions

Wang, Y. & Xu, L., Jan 2010, In : IEEE Transactions on Power Delivery. 25, 1, p. 367-377 11 p.

Research output: Contribution to journalArticle

Asynchronous generators
Farms
Electric power transmission networks
Electric potential
Power electronics
69 Citations (Scopus)

Coordinated reactive power control for facilitating fault ride-through of DFIG and FSIG based wind farms

Foster, S., Xu, L. & Fox, B., Mar 2010, In : IET Renewable Power Generation. 4, 2, p. 128-138 11 p.

Research output: Contribution to journalArticle

Asynchronous generators
Reactive power
Power control
Farms
Power generation
28 Citations (Scopus)

Improved rotor current control of wind turbine driven doubly-fed induction generators during network voltage unbalance

Hu, J., He, Y. & Xu, L., Jul 2010, In : Electric Power Systems Research. 80, 7, p. 847-856 10 p.

Research output: Contribution to journalArticle

Asynchronous generators
Electric current control
Wind turbines
Rotors
Controllers
137 Citations (Scopus)

Model-based predictive direct power control of doubly fed induction generators

Zhi, D., Xu, L. & Williams, B., Feb 2010, In : IEEE Transactions on Power Electronics. 25, 2, p. 341-351 11 p.

Research output: Contribution to journalArticle

Asynchronous generators
Power control
Sampling
Reactive power
Stators
15 Citations (Scopus)

Predictive current control of grid-connected voltage source converters during network unbalance

Hu, J., He, Y., Xu, L. & Zhi, D., 2010, In : IET Power Electronics. 3, 5, p. 690-701 12 p.

Research output: Contribution to journalArticle

Electric current control
Electric potential
Vector spaces
Modulation
Sampling
2009
68 Citations (Scopus)

Compensation of network voltage unbalance using doubly fed induction generator-based wind farms

Wang, Y., Xu, L. & Williams, B. W., Mar 2009, In : IET Renewable Power Generation. 3, 1, p. 12-22 11 p.

Research output: Contribution to journalArticle

Asynchronous generators
Farms
Electric potential
Torque
Rotors
333 Citations (Scopus)

Improved control of DFIG systems during network unbalance using PI-R current regulators

Hu, J. B., He, Y. K., Xu, L. & Williams, B. W., Feb 2009, In : IEEE Transactions on Industrial Electronics. 56, 2, p. 439-451 12 p.

Research output: Contribution to journalArticle

Asynchronous generators
Electric potential
Torque
Electric current control
Stators
169 Citations (Scopus)

Improved direct power control of grid connected DC/AC converters

Zhi, D., Xu, L. & Williams, B., May 2009, In : IEEE Transactions on Power Electronics. 24, 5, p. 1280-1292 13 p.

Research output: Contribution to journalArticle

Power control
Reactive power
Electric potential
Switching frequency
Inductance
88 Citations (Scopus)

Predictive current control of doubly fed induction generators

Xu, L., Zhi, D. & Williams, B. W., Oct 2009, In : IEEE Transactions on Industrial Electronics. 56, 10, p. 4143-4153 11 p.

Research output: Contribution to journalArticle

Asynchronous generators
Electric current control
Rotors
Sampling
Vector spaces
30 Citations (Scopus)
Natural frequencies
Electric current control
Controllers
Electric potential
Modulators
2008
268 Citations (Scopus)

Coordinated control of DFIG's rotor and grid side converters during network unbalance

Xu, L., 2 May 2008, In : IEEE Transactions on Power Electronics. 23, 3, p. 1041-1049 9 p.

Research output: Contribution to journalArticle

Asynchronous generators
Rotors
Controllers
Electric current control
Stators
23 Citations (Scopus)

Dynamic modeling and direct power control of wind turbine driven DFIG under unbalanced network voltage conditions

Hu, J. B., He, Y. K. & Xu, L., Dec 2008, In : Journal of Zhejiang University. Science A. 9, 12, p. 1731-1740 9 p.

Research output: Contribution to journalArticle

Asynchronous generators
Power control
Wind turbines
Rotors
Stators
92 Citations (Scopus)

Enhanced control and operation of DFIG-based wind farms during network unbalance

Xu, L., Dec 2008, In : IEEE Transactions on Energy Conversion. 23, 4, p. 1073-1081 8 p.

Research output: Contribution to journalArticle

Asynchronous generators
Farms
Controllers
Electric potential
Electric current control
2007
277 Citations (Scopus)

Direct power control of DFIG with constant switching frequency and improved transient performance

Zhi, D. & Xu, L., Mar 2007, In : IEEE Transactions on Energy Conversion. 22, 1, p. 110-118 8 p.

Research output: Contribution to journalArticle

Asynchronous generators
Switching frequency
Reactive power
Power control
Rotors
518 Citations (Scopus)

Dynamic modeling and control of DFIG-based wind turbines ynder unbalanced network conditions

Xu, L. & Wang, Y., Feb 2007, In : IEEE Transactions on Power Systems. 22, 1, p. 314-323 9 p.

Research output: Contribution to journalArticle

Asynchronous generators
Wind turbines
Stators
Torque
Rotors
327 Citations (Scopus)

Grid integration of large DFIG-based wind farms using VSC transmission

Xu, L., Yao, L. & Sasse, C., Aug 2007, In : IEEE Transactions on Power Systems. 22, 3, p. 976-984 9 p.

Research output: Contribution to journalArticle

Asynchronous generators
Farms
Electric potential
Frequency modulation
69 Citations (Scopus)

VSC transmission system using flying capacitor multilevel converters and hybrid PWM control

Xu, L. & Agelidis, V. G., Jan 2007, In : IEEE Transactions on Power Delivery. 22, 1, p. 693-702 10 p.

Research output: Contribution to journalArticle

Pulse width modulation
Capacitors
Electric potential
Reactive power
2006
557 Citations (Scopus)

Direct active and reactive power control of DFIG for wind energy generation

Xu, L. & Cartwright, P., Sep 2006, In : IEEE Transactions on Energy Conversion. 21, 3, p. 750-758 9 p.

Research output: Contribution to journalArticle

Asynchronous generators
Reactive power
Power control
Wind power
Stators
128 Citations (Scopus)

Grid integration of large offshore wind farms using HVDC

Xu, L. & Andersen, B., 2006, In : Wind Energy. 9, p. 371-382 12 p.

Research output: Contribution to journalArticle

Offshore wind farms
Electric potential
HVDC power transmission
Asynchronous generators
14 Citations (Scopus)

Increasing wind farm capacity

Dinic, N., Fox, B., Flynn, D., Xu, L. & Kennedy, A., Jul 2006, In : IEE Proceedings Generation Transmission and Distribution. 153, 4, p. 493-498 6 p.

Research output: Contribution to journalArticle

Farms
Electric potential
Asynchronous generators
Turbogenerators
Wind turbines
2005
24 Citations (Scopus)

Multi-level converter based VSC transmission operating under fault AC conditions

Xu, L., Andersen, B. & Cartwright, P., 2005, In : IEE Proceedings Generation Transmission and Distribution. 152, 2, p. 185-193 9 p.

Research output: Contribution to journalArticle

Capacitors
Electric potential
Controllers
Modulation
Decomposition
224 Citations (Scopus)

VSC transmission operating under unbalanced AC conditions - analysis and control design

Xu, L., Andersen, B. & Cartwright, P., Jan 2005, In : IEEE Transactions on Power Delivery. 20, 1, p. 427-434 7 p.

Research output: Contribution to journalArticle

Electric potential
Controllers
Decomposition
2004
49 Citations (Scopus)

Active capacitor voltage control of flying capacitor multilevel converters

Xu, L. & Agelidis, V. G., 8 May 2004, In : IEE Proceedings Electric Power Applications. 151, 3, p. 313-321 8 p.

Research output: Contribution to journalArticle

Voltage control
Capacitors
Electric potential
Switches
Modulation
126 Citations (Scopus)

Hybrid HVDC system for power transmission to island networks

Andersen, B. & Xu, L., Oct 2004, In : IEEE Transactions on Power Delivery. 19, 4, p. 1884-1890 6 p.

Research output: Contribution to journalArticle

Power transmission
Electric potential
Hybrid systems
Thyristors
Costs
2002
42 Citations (Scopus)

A flying capacitor multilevel converter based UPFC

Xu, L. & Agelidis, V. G., 2002, In : IEE Proceedings Electric Power Applications. 149, p. 304-310 7 p.

Research output: Contribution to journalArticle

Capacitors
Controllers
Electric potential
Harmonic distortion
Reactive power
35 Citations (Scopus)

HVDC transmission for large offshore windfarms

Kirby, N., Xu, L., Lucket, M. & Siepmann, W., 2002, In : Power Engineering Journal. 16, 3, p. 135-141 7 p.

Research output: Contribution to journalArticle

Offshore wind farms
Onshore wind farms
Electric potential
Wind power
Turbines

Topology for VSC transmission

Andersen, B., Xu, L., Horton, P. & Cartwright, P., 2002, In : Power Engineer. 16, p. 142-150 9 p.

Research output: Contribution to journalArticle

Capacitors
Topology
Electric potential
DC power transmission
Electric commutation
2001
41 Citations (Scopus)

Development considerations of DSP-controlled PWM VSC-based STATCOM

Xu, L., Agelidis, V. G. & Acha, E., 2001, In : IEE Proceedings Electric Power Applications. 148, 5, p. 449-455 6 p.

Research output: Contribution to journalArticle

Pulse width modulation
Electric potential
Insulated gate bipolar transistors (IGBT)
Digital signal processing
Transient analysis
2000
116 Citations (Scopus)

Acoustic noise radiated by PWM-controlled induction machine drives

Lo, W. C., Chan, C. C., Zhu, Z. Q., Xu, L., Howe, D. & Chau, K. T., Aug 2000, In : IEEE Transactions on Industrial Electronics. 47, 4, 10 p.

Research output: Contribution to journalArticle

Acoustic noise
Modulation
Vector spaces
Air
Induction motors
27 Citations (Scopus)

Acoustic noise radiated from direct torque controlled induction motor drives

Xu, L., Zhu, Z. Q. & Howe, D., Nov 2000, In : IET Electric Power Applications. 147, 6, p. 491-496 6 p.

Research output: Contribution to journalArticle

Acoustic noise
Induction motors
Torque
Pulse width modulation
Fluxes