Simulation Study of Grid-side Improved Control Strategy for Direct-driven Wind Turbine Under Unbalanced Faults

Authors

Wang Dan, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China;
Chongru Liu, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China;
Gengyin Li, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Beijing 102206, China;

Abstract

Abstract: In order to reduce the power and DC voltage fluctuations of direct-driven wind turbine under unbalanced grid faults, an integrated and improved control strategy for grid-side converter was proposed. In the analysis of grid-side power characteristics, positive and negative sequence components of grid-side voltage and current were calculated by converting them to the same reference frame and a compensation control loop to simultaneously restrain the second harmonic components of active and reactive power was designed on the basis of quasi proportional resonant control. Moreover, to reduce DC-link overvoltage, a feed-forward modified component reflecting the active power error between the two-terminal converters was added to the traditional DC voltage controller. A simulation model of direct-driven wind turbine grid-connected system was built in PSCAD/EMTDC. The simulation results validated that the proposed control strategy can improve the fault ride-through capability of direct-driven wind turbine.

Recommended Citation

Dan, Wang; Liu, Chongru; and Li, Gengyin (2020) "Simulation Study of Grid-side Improved Control Strategy for Direct-driven Wind Turbine Under Unbalanced Faults," Journal of System Simulation: Vol. 28: Iss. 5, Article 18.
Available at: https://dc-china-simulation.researchcommons.org/journal/vol28/iss5/18

First Page

1131

Revised Date

2016-01-22

DOI Link

https://doi.org/

Last Page

1139

CLC

TM464;TM614

Recommended Citation

Wang Dan, Liu Chongru, Li Gengyin. Simulation Study of Grid-side Improved Control Strategy for Direct-driven Wind Turbine Under Unbalanced Faults[J]. Journal of System Simulation, 2016, 28(5): 1131-1139.