Coordinated Control of DFIG System based on Repetitive Control Strategy under Generalized Harmonic Grid Voltages

Heng Nian; Chenwen Cheng; Yipeng Song

Coordinated Control of DFIG System based on Repetitive Control Strategy under Generalized Harmonic Grid Voltages

Heng Nian

Chenwen Cheng

Yipeng Song

Vol. 17, No. 3, pp. 733-743, May 2017

10.6113/JPE.2019.17.3.733

DC-link voltage fluctuation

Doubly fed induction generator system

Generalized harmonic grid voltage

Repetitive control

Sinusoidal output currents

Smooth electromagnetic torque

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Abstract

This paper develops a coordinated control strategy of the doubly fed induction generator (DFIG) system based on repetitive control (RC) under generalized harmonic grid voltage conditions. The proposed RC strategy in the rotor side converter (RSC) is capable of ensuring smooth DFIG electromagnetic torque that will enable the possible safe functioning of the mechanical components, such as gear box and bearing. Moreover, the proposed RC strategy in the grid side converter (GSC) aims to achieve sinusoidal overall currents of the DFIG system injected into the network to guarantee satisfactory power quality. The dc-link voltage fluctuation under the proposed control target is theoretically analyzed. Influence of limited converter capacity on the controllable area has also been studied. A laboratory test platform has been constructed, and the experimental results validate the availability of the proposed RC strategy for the DFIG system under generalized harmonic grid voltage conditions.

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Cite this article

[IEEE Style]

H. Nian, C. Cheng, Y. Song, "Coordinated Control of DFIG System based on Repetitive Control Strategy under Generalized Harmonic Grid Voltages," Journal of Power Electronics, vol. 17, no. 3, pp. 733-743, 2017. DOI: 10.6113/JPE.2019.17.3.733.

[ACM Style]

Heng Nian, Chenwen Cheng, and Yipeng Song. 2017. Coordinated Control of DFIG System based on Repetitive Control Strategy under Generalized Harmonic Grid Voltages. Journal of Power Electronics, 17, 3, (2017), 733-743. DOI: 10.6113/JPE.2019.17.3.733.