Exploitation of Electronic Devices - Selected Issues

Paś, Jacek; Buchla, Sławomir

doi:10.2478/jok-2019-0007

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…The solar declination appearing in Formulas ( 8) and ( 9) is calculated according to Formula (10) and the Sun's hour angle is calculated according to Formula (11)…”

Section: 𝐺 = 𝐺 − 𝐺 mentioning

confidence: 99%

“…Maintaining the highest efficiency level of PV systems throughout their operation requires reliable and rapid servicing and diagnosing [5][6][7]. In light of the territorial dispersion of micro-systems (with most of them located on buildings), methods that involve systematic human-conducted equipment inspections are costly [8][9][10]. Therefore, remote diagnosis is the basic technique [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Application of the Energy Efficiency Mathematical Model to Diagnose Photovoltaic Micro-Systems

Olchowik,

Bednarek,

Dąbrowski

et al. 2023

Energies

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The intensive development of photovoltaic (PV) micro-systems contributes to increased interest in energy efficiency and diagnosing the condition of such solutions. Optimizing system energy efficiency and servicing costs are particularly noteworthy among the numerous issues associated with this topic. This research paper addresses the easy and reliable diagnosis of PV system malfunctions. It discusses the original PV system energy efficiency simulation model with proprietary methods for determining total solar irradiance on the plane of cells installed at any inclination angle and azimuth, as well as PV cell temperature and efficiency as a function of solar irradiance. Based on this simulation model, the authors developed procedures for the remote diagnosis of PV micro-systems. Verification tests covered two independent PV systems over the period from April 2022 to May 2023. The obtained results confirm the high credibility level of both the adopted energy efficiency simulation model and the proposed method for diagnosing PV system functional status.

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“…The solar declination appearing in Formulas ( 8) and ( 9) is calculated according to Formula (10) and the Sun's hour angle is calculated according to Formula (11)…”

Section: 𝐺 = 𝐺 − 𝐺 mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of the Energy Efficiency Mathematical Model to Diagnose Photovoltaic Micro-Systems

Olchowik,

Bednarek,

Dąbrowski

et al. 2023

Energies

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“…Assuming that the time of restoring the full ability state t FA1 is enclosed in a bounded interval t FA1 ∈ 12; 168 (h) (that is, within days t FA1 ∈ 0.5; 7 (day)), the probabilities of the analyzed system staying in full ability state are presented in Figure 3. The time value t FA1 is defined on the basis of real power supply system observation [46][47][48]. The time depends on the service delivery, which aims to fix the system.…”

Section: Exploitation Process Modeling Of Psss In Ttdsmentioning

confidence: 99%

Quality and Reliability-Exploitation Modeling of Power Supply Systems

et al. 2021

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This article describes the issues related to the analysis of the reliability-exploitation of power supply systems in transport telematics devices (PSSs in TTDs). This paper characterizes solutions, which are applied in supply systems, and describes a PSS in a TTD from a main source and a standby one. This enables determining the dependencies denoting the probabilities of the system staying in full ability state, safety threat state, and safety unreliability state. A quality analysis of the PSS in TTD was conducted, and the indicator value of the supply continuity quality was evaluated. This indicator allows the demonstration of continuity quality of power supply (CQoPS) dependency on many quality dimensions, not just reliability. An example demonstrates the calculation of CQoPS factor for both the main and the standby power supply, employing three observations, each influencing the quality. The presented considerations in the field of quality and reliability-exploitation modeling of a PSS can be applied as well in other public utility facilities (including those classified as critical infrastructure). The character of functions performed by critical infrastructure facilities demands an operating continuity of these systems at an appropriate level. The co-first authors of the article once again address the issue of determining CQoPS factor, this time on the basis of modeling using mathematical evidence. TTD is an example in this article, because the presented methods can be used in any kind of system, especially in the power source of critical systems.

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“…Because they are supposed to ensure protection for people and property, it is required for them to be characterized by a high readiness index value. It is also important that they are resistant to different adverse external factors [1][2][3][4]. This especially applies to their power supply [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Method for Evaluating the Effectiveness of Electrical Circuit Protection with Miniature Fuse-Links

2023

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Miniature fuses as an anti-damage subsystem perform the important function of protecting electronic devices and systems against permanent damage that may result in electric shocks, fire risks, etc. Their role becomes particularly important when they are installed in such special systems as electronic security systems (ESS). For this reason, there is a need for practical verification of their protective properties. The article presents the results of destructive tests of the circuit-breaking time of miniature fuse-links considered in terms of their usefulness in the ESS with the use of a passive experimental add-on, developed at the Military University of Technology in Warsaw. The characteristics of the measuring attachment circuit and the measurement methodology used were presented. Based on the obtained measurement points of the obtained time–current characteristics, an attempt was made to develop their mathematical model using numerical methods in the field of non-linear regression, using the least squares optimization method (Levenberg–Marquardt algorithm). An exemplary classification of miniature fuse-links has been proposed due to their protective properties of circuits in the context of their use in electronic security systems. The considerations were summarized with an economic analysis of the tested fuse links. The conclusions include proposals for changes to the provisions of the European standard PN-EN 50131-1:2009 “Alarm systems: Intrusion and hold-up systems Part 1: System requirements” and Polish Defence Standard NO-04-A004-8 2016 “Military facilities. Alarm systems. Part 8: Operation”.

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Exploitation of Electronic Devices - Selected Issues

Cited by 6 publications

References 12 publications

Application of the Energy Efficiency Mathematical Model to Diagnose Photovoltaic Micro-Systems

Application of the Energy Efficiency Mathematical Model to Diagnose Photovoltaic Micro-Systems

Quality and Reliability-Exploitation Modeling of Power Supply Systems

Method for Evaluating the Effectiveness of Electrical Circuit Protection with Miniature Fuse-Links

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