TY - GEN
T1 - Integrating photovoltaic inverter reliability into energy yield estimation with Markov models
AU - Dhople, Sairaj V.
AU - Davoudi, Ali
AU - Chapman, Patrick L.
AU - Domínguez-García, Alejandro D.
PY - 2010/10/22
Y1 - 2010/10/22
N2 - Markov reliability models to estimate Photovoltaic (PV) inverter reliability are proposed for utility-interactive systems. These are then extended to generate a unified PV energy-yield model. The integrated reliability-energy yield framework is superior to conventional methods as it accounts for inverter failures and repairs. The proposed analytical framework is utilized to compare conventional central inverter architectures to emerging architectures that employ microinverters. Case studies applied to a 9 kW residential system indicate that over a 25 year period, in typical operating conditions, microinverters provide higher energy yield as compared to a conventional system. Additionally, the analysis demonstrates that the energy yield is more sensitive to the repair time compared to the mean time to failure of the inverters.
AB - Markov reliability models to estimate Photovoltaic (PV) inverter reliability are proposed for utility-interactive systems. These are then extended to generate a unified PV energy-yield model. The integrated reliability-energy yield framework is superior to conventional methods as it accounts for inverter failures and repairs. The proposed analytical framework is utilized to compare conventional central inverter architectures to emerging architectures that employ microinverters. Case studies applied to a 9 kW residential system indicate that over a 25 year period, in typical operating conditions, microinverters provide higher energy yield as compared to a conventional system. Additionally, the analysis demonstrates that the energy yield is more sensitive to the repair time compared to the mean time to failure of the inverters.
KW - Energy yield estimation
KW - Markov reliability models
KW - Photovoltaic energy conversion
KW - Utility-interactive inverters
UR - http://www.scopus.com/inward/record.url?scp=77957976861&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957976861&partnerID=8YFLogxK
U2 - 10.1109/COMPEL.2010.5562393
DO - 10.1109/COMPEL.2010.5562393
M3 - Conference contribution
AN - SCOPUS:77957976861
SN - 9781424474639
T3 - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
BT - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
T2 - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
Y2 - 28 June 2010 through 30 June 2010
ER -