PV System Reliability: An Operator's Perspective

Golnas, Anastasios

doi:10.1109/jphotov.2012.2215015

Cited by 144 publications

(65 citation statements)

References 2 publications

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“…(1). This is in line with what reported in existing literature [15] and with the experience personally discussed with some PV plant operators. However, the FMEA shows also the importance of maintenance activities for the early detection of some hidden failure modes that could not affect immediately the plant, but could degenerate into a system problem if not promptly handled.…”

Section: Discussionsupporting

confidence: 92%

“…Assuming that we should not expect extreme variation in the failure rates reported by specific databases or report for electric sub-components (such as [7]), the first limitation specified above has been the most difficult to overcome. PV operation and maintenance companies are not prone to release their data, thus the quantitative information on the failures of PV specific components has been based on a single publication in the PV reliability field reporting failure statistics [15]. Table 1 shows the failure rates, expressed in failures per unit hour, considered for each sub-components.…”

Section: The Available Data and The Scoring Systemmentioning

confidence: 99%

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Failure mode and effect analysis for photovoltaic systems

Colli

2015

Renewable and Sustainable Energy Reviews

118

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Section: Discussionsupporting

confidence: 92%

Section: The Available Data and The Scoring Systemmentioning

confidence: 99%

Failure mode and effect analysis for photovoltaic systems

Colli

2015

Renewable and Sustainable Energy Reviews

118

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“…SunEdison operates more than 600 PV systems in four continents and their systems are in the range of few kW to 70 MW. The analysis of their 3500 failure tickets between January 2010 and March 2012, over a 27-month period, concludes the fact that 43% of the total failures are from inverters and only 2% come from the PV modules [4]. Another reference confirms through the field experience that the inverter is the most vulnerable component in a PV power system [8].…”

Section: Introductionmentioning

confidence: 83%

Performance Evaluation of Three-Phase Grid-Connected Photovoltaic Inverters Using Electrolytic or Polypropylene Film Capacitors

Karanayil

Agelidis

Pou

2014

IEEE Trans. Sustain. Energy

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In grid-connected photovoltaic (PV) power stations, improving the life expectancy and long-term reliability of threephase PV inverters is urgently needed to match the significantly higher lifetime of the PV modules. A key contribution toward such improvement is replacing the conventional electrolytic film capacitors by metallized polypropylene film ones. This paper presents a detailed evaluation of a conventional three-phase grid-connected PV inverter performance when replacing the electrolytic capacitor with a minimum value of metallized polypropylene film capacitor. Although the minimum dc bus capacitance leads to higher voltage ripples, such ripples were found to be within acceptable limits to operate the inverter satisfactorily. Simulation and experimental results are presented for a 5-kW grid-connected inverter prototype with a nominal dc voltage of 457 V to confirm the theoretical considerations.Index Terms-Electrolytic capacitor, grid-connected inverters, metallized polypropylene film capacitor, photovoltaic (PV) systems.

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“…The simplified presentation of the zeros in Equations (20) and (21) as well as their locations in a complex plane can be justified as follows: It is known according to [21] that the zeros of Equations (17) and (19) are well separated. It is also known that the sum of the roots forms the coefficient of the first-order term and the product of the roots forms the zeroth-order term in a quadratic equation.…”

Section: Effect Of Pv Generatormentioning

confidence: 99%

“…The instability does not cause shutdown of the energy system if the operating point is automatically moved into the proper operational region, as demonstrated in [12][13][14], which would increase the system reliability [19,20]. The proper operational region usually depends on the switch-control scheme of the power stage: If the power stage is adopted directly from the corresponding voltage-domain converter, then the proper operational region is usually CVR.…”

Section: Introductionmentioning

confidence: 99%

Grid-Forming-Mode Operation of Boost-Power-Stage Converter in PV-Generator-Interfacing Applications

2017

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Abstract:The application of constant power control and inclusion of energy storage in grid-connected photovoltaic (PV) energy systems may increase the use of two-stage system structures composed of DC-DC-converter-interfaced PV generator and grid-connected inverter connected in cascade. A typical PV-generator-interfacing DC-DC converter is a boost-power-stage converter. The renewable energy system may operate in three different operation modes-grid-forming, grid-feeding, and grid-supporting modes. In the last two operation modes, the outmost feedback loops are taken from the input terminal of the associated power electronic converters, which usually does not pose stability problems in terms of their input sources. In the grid-forming operation mode, the outmost feedback loops have to be connected to the output terminal of the associated power electronic converters, and hence the input terminal will behave as a negative incremental resistor at low frequencies. This property will limit the operation of the PV interfacing converter in either the constant voltage or constant current region of the PV generator for ensuring stable operation. The boost-power-stage converter can be applied as a voltage or current-fed converter limiting the stable operation region accordingly. The investigations of this paper show explicitly that only the voltage-fed mode would provide feasible dynamic and stability properties as a viable interfacing converter.

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PV System Reliability: An Operator's Perspective

Cited by 144 publications

References 2 publications

Failure mode and effect analysis for photovoltaic systems

Failure mode and effect analysis for photovoltaic systems

Performance Evaluation of Three-Phase Grid-Connected Photovoltaic Inverters Using Electrolytic or Polypropylene Film Capacitors

Grid-Forming-Mode Operation of Boost-Power-Stage Converter in PV-Generator-Interfacing Applications

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