Reliability research for PV system using BDD-based fault tree analysis

Hu, Rong; Mi, Jinhua; Hu, Tianyou; Fu, Minling; Yang, Pan

doi:10.1109/qr2mse.2013.6625601

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…Researchers such as; Huffman [1], Hamdy et al [2] and Graaff et al [3] investigated on significant issues concerning the reliability, and safety of PV systems, RAM study of large-scale grid-connected solar-PV systems is conducted using a range of reliability approaches. Zhang et al [4] and Hu et al [5] conduct reliability block diagram (RBD) and fault tree analysis (FTA). In the sense of an FTA, the physical structure is translated into a logical diagram, with each block representing a device part.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Photovoltaic Systems Using (RAMD) Analysis

Maihulla

Yusuf

2021

J. Nig. Soc. Phys. Sci.

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The primary aim of this present study is to examine how reliability, availability, maintainability, and dependability (RAMD) are used to describe the criticality of each sub-assembly in grid- connected photovoltaic systems. A transition diagram of all subsystems is produced for this analysis, and Chapman-Kolmogorov differential equations for each variable of each subsystem are constructed using the Markov birth-death process. Both random failure and repair time variables have an exponential distribution and are statistically independent. A sufficient repair facility is still available with the device. The numerical results for reliability, maintainability, dependability, and steady-state availability for various photovoltaic device components have been obtained. Other metrics, such as mean time to failure (MTTF), mean time to repair (MTTR), and dependability ratio, which aid in device performance prediction, have also been measured. According to numerical analysis. it is hypothesized that subsystem S4, i.e. the inverter, is the most critical and highly sensitive portion that requires special attention in order to improve the efficiency of the PV device plant. The findings of this research are very useful for photovoltaic system designers and maintenance engineers.

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Section: Introductionmentioning

confidence: 99%

Performance Analysis of Photovoltaic Systems Using (RAMD) Analysis

Maihulla

Yusuf

2021

J. Nig. Soc. Phys. Sci.

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“…RAM analysis of large scale grid-connected solar-PV systems is carried out using several reliability methods. Among them, as seen in earlier reliability work, reliability block diagram (RBD), and fault tree analysis (FTA) [10][11][12][13]. In FTA, the physical layout is interpreted into a logical diagram whereby each block represents a system component.…”

Section: Introductionmentioning

confidence: 99%

Reliability, Availability and Maintainability Analysis for Grid-Connected Solar Photovoltaic Systems

et al. 2019

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Recently, solar power generation is significantly contributed to growing renewable sources of electricity all over the world. The reliability and availability improvement of solar photovoltaic (PV) systems has become a critical area of interest for researchers. Reliability, availability, and maintainability (RAM) is an engineering tool used to address operational and safety issues of systems. It aims to identify the weakest areas of a system which will improve the overall system reliability. In this paper, RAM analysis of grid-connected solar-PV system is presented. Elaborate RAM analysis of these systems is presented starting from the sub-assembly level to the subsystem level, then the overall system. Further, an improved Reliability Block Diagram is presented to estimate the RAM performance of seven practical grid-connected solar-PV systems. The required input data are obtained from worldwide databases of failures, and repair of various subassemblies comprising various meteorological conditions. A novel approach is also presented in order to estimate the best probability density function for each sub-assembly. The monitoring of the critical subassemblies of a PV system will increase the possibility not only for improving the availability of the system, but also to optimize the maintenance costs. Additionally, it will inform the operators about the status of the various subsystems of the system.

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“…The analysis of LSPVSs is commonly carried out using a fault tree analysis (FTA), as seen in early [14] and more recent [15,16] reliability work. FTAs are used to interpret a physical layout (such a PV system) into a logical diagram (block diagram) whereby each block represents a system component, described by its failure rate.…”

Section: Introductionmentioning

confidence: 99%

Impact of Component Reliability on Large Scale Photovoltaic Systems’ Performance

Baschel

Koubli

Roy³

et al. 2018

Energies

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In this work, the impact of component reliability on large scale photovoltaic (PV) systems' performance is demonstrated. The analysis is largely based on an extensive field-derived dataset of failure rates of operation ranging from three to five years, derived from different large-scale PV systems. Major system components, such as transformers, are also included, which are shown to have a significant impact on the overall energy lost due to failures. A Fault Tree Analysis (FTA) is used to estimate the impact on reliability and availability for two inverter configurations. A Failure Mode and Effects Analysis (FMEA) is employed to rank failures in different subsystems with regards to occurrence and severity. Estimation of energy losses (EL) is realised based on actual failure probabilities. It is found that the key contributions to reduced energy yield are the extended repair periods of the transformer and the inverter. The very small number of transformer issues (less than 1%) causes disproportionate EL due to the long lead times for a replacement device. Transformer and inverter issues account for about 2/3 of total EL in large scale PV systems (LSPVSs). An optimised monitoring strategy is proposed in order to reduce repair times for the transformer and its contribution to EL.

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Reliability research for PV system using BDD-based fault tree analysis

Cited by 9 publications

References 1 publication

Performance Analysis of Photovoltaic Systems Using (RAMD) Analysis

Performance Analysis of Photovoltaic Systems Using (RAMD) Analysis

Reliability, Availability and Maintainability Analysis for Grid-Connected Solar Photovoltaic Systems

Impact of Component Reliability on Large Scale Photovoltaic Systems’ Performance

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