Reliability Assessment of Transformerless PV Inverters considering Mission Profiles

Yang, Yongheng; Wang, Huai; Blaabjerg, Frede

doi:10.1155/2015/968269

Cited by 13 publications

(9 citation statements)

References 41 publications

(64 reference statements)

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“…A physics-of-failure assessment is understood through the failure mechanisms of the components of power converters and external physical stressors, such as ambient temperature, solar irradiance, and relative humidity [19], [20], [21]. Some studies included the reliability of inverters with different topologies [22], [23]. Other studies included the detailed prediction of the reliability of IGBTs for medium-and high-power inverter applications [24], [25], [26].…”

Section: Existing Literaturementioning

confidence: 99%

Photovoltaic Inverter Reliability Assessment

Nagarajan

Thiagarajan

Repins

et al. 2019

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Section: Existing Literaturementioning

confidence: 99%

Photovoltaic Inverter Reliability Assessment

Nagarajan

Thiagarajan

Repins

et al. 2019

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“…5. However, the removal of isolation transformers can generate leakage currents in the system, which may be addressed by specifically designing the modulation schemes [5], [14]. Although single-phase grid-connections are more commonly seen in PV applications, increasing demands in power push the rating of PV systems higher.…”

Section: Power Converters For Pv Systemsmentioning

confidence: 99%

Design for Reliability of Power Electronics for Grid-Connected Photovoltaic Systems

Yang¹,

Sangwongwanich²,

Blaabjerg³

2016

CPSS TPEA

Self Cite

116

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Abstract-Power electronics is the enabling technology for optimizing energy harvesting from renewable systems like Photovoltaic (PV) and wind power systems, and also for interfacing grid-friendly energy systems. Advancements in the power semiconductor technology (e.g., wide band-gap devices) have pushed the conversion efficiency of power electronics to above 98%, where however the reliability of power electronics is becoming of high concern. Therefore, it is important to design for reliable power electronic systems to lower the risks of many failures during operation; otherwise will increase the cost for maintenance and reputation, thus affecting the cost of PV energy. Today's PV power conversion applications require the power electronic systems with low failure rates during a service life of 20 years or even more. To achieve so, it is vital to know the main life-limiting factors of power electronic systems as well as to design for high reliability at an early stage. Knowhow of the loading in power electronics in harsh operating environments (e.g., fluctuating ambient temperature and solar irradiance) is important for life-time prediction, as the prerequisite of Design for Reliability (DfR). Hence, in this paper, the technological challenges in DfR of power electronics for grid-connected PV systems will be addressed, where how the power converters are stressed considering real-field mission profiles. Furthermore, the DfR technology will be systematically exemplified on practical power electronic systems (i.e., gridconnected PV systems).

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“…Furthermore, similar to the WTS, reliability is getting more importance in power electronics (including PV systems). This can contribute to extended total energy production and reduced cost of energy [18], [33], [34]. Finally, because of exposure or smaller housing chamber, the PV converter should be more temperature insensitive, which in return is good from the reliability point of view.…”

Section: Demands To Pv Power Conversion Systemsmentioning

confidence: 99%