Title :
Multiterminal DC Wind Farm Collection Grid Internal Fault Analysis and Protection Design
Author :
Yang, Jin ; Fletcher, John Edward ; O´Reilly, John
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Glasgow, Glasgow, UK
Abstract :
The multiterminal dc wind farm is a promising topology with a voltage-source inverter (VSI) connection at the onshore grid. Voltage-source converters (VSCs) are robust to ac-side fault conditions. However, they are vulnerable to dc faults on the dc side of the converter. This paper analyzes dc faults, their transients, and the resulting protection issues. Overcurrent faults are analyzed in detail and provide an insight into protection system design. The radial wind farm topology with star or string connection is considered. The outcomes may be applicable for VSCs in the multi-VSC dc wind farm collection grid and VSC-based high-voltage direct current (HVDC) offshore transmission systems.
Keywords :
fault diagnosis; offshore installations; overcurrent protection; power system protection; wind power plants; ac-side fault conditions; grid internal fault analysis; high-voltage direct current offshore transmission systems; multiterminal dc wind farm; onshore grid; overcurrent faults; protection design; radial wind farm topology; voltage-source inverter connection; Converters; HVDC transmission; Inverters; Power conversion; Protection; Robustness; Topology; Transient analysis; Voltage; Wind farms; Fault overcurrent; multiterminal dc wind farm; voltage-source converter (VSC); wind power generation;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2010.2044813
