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中南大学学报(英文版)

Journal of Central South University

Vol. 26    No. 10    October 2019

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A general analytical approach to reach maximum grid support by PMSG-based wind turbines under various grid faults
Farid Atash BAHAR1, Ali AJAMI1, Hossein MOKHTARI2, Hossein HOJABRI3

1. Department of Electrical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran;
2. Department of Electrical Engineering, Sharif University of Technology, Tehran, Iran;
3. Department of Electrical Engineering, Shahid Bahonar University, Kerman, Iran

Abstract:A novel fault ride-through strategy for wind turbines, based on permanent magnet synchronous generator, has been proposed. The proposed strategy analytically formulates the reference current signals, disregarding grid fault type and utilizes the whole system capacity to inject the reactive current required by grid codes and deliver maximum possible active power to support grid frequency and avoid generation loss. All this has been reached by taking the grid-side converter’s phase current limit into account. The strategy is compatible with different countries’ grid codes and prevents pulsating active power injection, in an unbalanced grid condition. Model predictive current controller is applied to handling rapid transients. During faults, the energy storage system maintains DC-link voltage, which causes voltage fluctuations to be eliminated, significantly. A fault ride-through strategy was proposed for PMSG-based wind turbines, neglecting fault characteristics, second, reaching maximum possible grid support in faulty grid conditions, while avoiding over-current and third, considerable reduction in energy storage system size and power rating. Inspiring simulations have been carried out through MATLAB/SIMULINK to validate the feasibility and competency of the proposed fault ride-through method and efficiency of the entire control system.

 

Key words: energy storage; permanent magnet machines; power system faults; predictive control; wind power generation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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