Lifetime Evaluation of Three-Level Inverters for 1500-V Photovoltaic Systems

• Published in: IEEE journal of emerging and selected topics in power electronics Vol. 9; no. 4; pp. 4285 - 4298
• Main Authors: He, Jinkui, Sangwongwanich, Ariya, Yang, Yongheng, Iannuzzo, Francesco
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.08.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Electric potential; Energy conversion efficiency; Installation costs; Inverters; Lifetime; mission profile; multilevel inverters; photovoltaic (PV) inverters; Photovoltaic cells; Power system reliability; reliability; Reliability analysis; Reliability aspects; Reliability engineering; Service life assessment; Stress; Thermal cycling; Topology; Voltage

The installation cost of photovoltaic (PV) plants can be reduced considerably by extending the maximum dc voltage from 1000 to 1500 V (e.g., with more PV arrays connected in series). However, the increased dc voltage also presents challenges on the design and operation of PV inverters in terms of ef...