TY - JOUR
T1 - Virtual Temperature Detection of Semiconductors in a Megawatt Field Converter
AU - Rannestad, Bjorn
AU - Fischer, Katharina
AU - Nielsen, Peter
AU - Gadgaard, Kristian
AU - Munk-Nielsen, Stig
N1 - Publisher Copyright:
© 1982-2012 IEEE.
PY - 2020/2
Y1 - 2020/2
N2 - A converter monitoring unit (CMU) that monitors the power modules of the converter in a multimegawatt test wind turbine is presented in this paper. A method of calculating the virtual temperature (T-{v}) of the power semiconductors is laid out. Contrary to previous work, the method enables T-{v} characterization of the semiconductors by means of sampled data during normal operation of the converter, without the need for special calibration routines. The dynamic operation of the wind turbine and the large amount of data sampled in the CMU enables a statistical approach to generate reference data for T-{v} calculations. The method was tested on machine side converter diodes of the test turbine, based on samples of collector-emitter voltage (vce-{\text{on}}) and current (i-{c}). Other temperature sensitive electrical parameters may also be used as input to the method. The CMU has been operating for more than a year in the test turbine, showing consistent data throughout the whole period. While the monitoring method and results are based on measurements on a single test turbine, the paper also link these to converter failure data from a large fleet of operating turbines.
AB - A converter monitoring unit (CMU) that monitors the power modules of the converter in a multimegawatt test wind turbine is presented in this paper. A method of calculating the virtual temperature (T-{v}) of the power semiconductors is laid out. Contrary to previous work, the method enables T-{v} characterization of the semiconductors by means of sampled data during normal operation of the converter, without the need for special calibration routines. The dynamic operation of the wind turbine and the large amount of data sampled in the CMU enables a statistical approach to generate reference data for T-{v} calculations. The method was tested on machine side converter diodes of the test turbine, based on samples of collector-emitter voltage (vce-{\text{on}}) and current (i-{c}). Other temperature sensitive electrical parameters may also be used as input to the method. The CMU has been operating for more than a year in the test turbine, showing consistent data throughout the whole period. While the monitoring method and results are based on measurements on a single test turbine, the paper also link these to converter failure data from a large fleet of operating turbines.
KW - Converters
KW - insulated gate bipolar transistors
KW - monitoring
KW - pulsewidth modulated inverters
UR - http://www.scopus.com/inward/record.url?scp=85073074987&partnerID=8YFLogxK
U2 - 10.1109/TIE.2019.2901662
DO - 10.1109/TIE.2019.2901662
M3 - Journal article
AN - SCOPUS:85073074987
SN - 0278-0046
VL - 67
SP - 1305
EP - 1315
JO - IEEE Transactions on Industrial Electronics
JF - IEEE Transactions on Industrial Electronics
IS - 2
M1 - 8658003
ER -