A Grid Voltage Measurement Method for Wind Power Systems during Grid Fault Conditions

Grid codes in many countries require low-voltage ride-through (LVRT) capability to maintain power system stability and reliability during grid fault conditions. To meet the LVRT requirement, wind power systems must stay connected to the grid and also supply reactive currents to the grid to support t...

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Bibliographic Details
Published in:Energies (Basel) 2014-11, Vol.7 (11), p.7732-7745
Main Authors: Yoo, Cheol-Hee, Chung, Il-Yop, Yoo, Hyun-Jae, Hong, Sung-Soo
Format: Article
Language:English
Subjects:
Algorithms
Alternative energy sources
Codes
Electric potential
Electrical measurements
Fault detection
Faults
grid codes
Kalman filters
LVRT
On-line systems
Parameter estimation
Signal processing
Synchronous
Systems stability
Turbines
Voltage
voltage measurement
Wind power
wind power system
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Summary:Grid codes in many countries require low-voltage ride-through (LVRT) capability to maintain power system stability and reliability during grid fault conditions. To meet the LVRT requirement, wind power systems must stay connected to the grid and also supply reactive currents to the grid to support the recovery from fault voltages. This paper presents a new fault detection method and inverter control scheme to improve the LVRT capability for full-scale permanent magnet synchronous generator (PMSG) wind power systems. Fast fault detection can help the wind power systems maintain the DC-link voltage in a safe region. The proposed fault detection method is based on on-line adaptive parameter estimation. The performance of the proposed method is verified in comparison to the conventional voltage measurement method defined in the IEC 61400-21 standard.
ISSN:1996-1073
1996-1073
DOI:10.3390/en7117732