A Survey of Different DC Faults in a Solar Power System

Omran, Alaa Hamza; Said, Dalila Mat; Hussin, Siti Maherah; Abdulhussain, Sadiq H.; Ahmad, Nasarudin

doi:10.1109/icspc50992.2020.9305810

Cited by 4 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation expresses the properties of the hyperbolic approximation model (4)(5)(6)(7)(8). The model is represented by an analogous circuit with a variable resistor in series with the dependent voltage source and is based on a mathematical approximation (v gap ).…”

Section: Hyperbolic Approximation Modelmentioning

confidence: 99%

“…Improper and inadequate maintenance will sharply increase the potentiality of DC arc occurrence. Where, the long-term weathering and aging effect will deteriorate the system components such as cables, connectors and conductors [1]- [5]. It also should be mentioned that, the lack of current zero crossing in AC arcing tends to make the DC arcs more sustainable.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photovoltaic system DC series arc fault: a case study

Omran

Said

Hussin

et al. 2022

IJEECS

Self Cite

View full text Add to dashboard Cite

<p>Photovoltaic (PV) systems are becoming increasingly popular; however, arc faults on the direct current (DC) side are becoming more widespread as a result of the effects of aging as well as the trend toward higher DC voltage levels, posing severe risk to human safety and system stability. The parallel arc faults present higher level of current as compared with the series arc faults, making it more difficult to spot the series arc. In this paper and for the aim of condition monitoring, the features of a DC series arc fault are analyzed by analysing the arc features, performing model’s simulation in PSCAD, and carrying out experimental studies. Various arc models are simulated and investigated; for low current arcs, the heuristic model is used where a set of parameters established. Moreover, the heuristic model’s simulated arc has been shown to be compatible with the experimental data. The features of arc noise in the electrode separation region and steady-arcing states with varied gap widths are investigated. It has been discovered that after an arc fault occurs, arc noise increases, notably in the frequency range below 50 kHz; where this property is useful for detecting DC series arc faults. Besides that, variations in air gap width are more sensitive to frequencies under 5 kHz.</p>

show abstract

Section: Hyperbolic Approximation Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photovoltaic system DC series arc fault: a case study

Omran

Said

Hussin

et al. 2022

IJEECS

Self Cite

View full text Add to dashboard Cite

show abstract

“…In particular, Hot spots, Encapsulation faults, Cell cracking, Damaged interconnection, Breakdowns at the junction box, Bypass diode, Shade faults, short circuits, Ground faults, Open circuit faults, Line-line faults, MPPT and inverter faults, DC-DC Converter Faults and the Battery bank failures are worthy of mention because of their multiple effects on the above-mentioned systems. Any of these faults lead to a decrease in system performance, sometimes even total damage to the system, and thus a lack of energy [8,9,10]. Moreover, decreasing the profit of the installation, not to mention the maintenance cost to restore the system to normal condition.…”

Section: Introductionmentioning

confidence: 99%

Fault detection in photovoltaic systems using the inverse of the belonging individual Gaussian probability

Sendjasni¹,

Yagoubi²,

Daoud³

et al. 2023

Diagnostyka

View full text Add to dashboard Cite

This article addresses the problem of fault early detection in photovoltaic systems. In the production field, solar power plants consist of many photovoltaic arrays, which may suffer from many different types of malfunctions over time. Hence, fault early detection before it affects PV systems and leads to a full system failure is essential to monitor these systems. The fields of control and monitoring of systems have been extensively approached by many researchers using various fault detection methods. Despite all this research, to early detect and locate faults in a very large photovoltaic power plant, we must, in particular, think of an effective method that allows us to do so at the lowest costs and time. Thus, we propose a new robust technique based on the inverse of the belonging individual Gaussian probability (IBIGP) to early detect and locate faults in the power curve as well as in the Infrared image of the photovoltaic systems. While most fault detection methods are well incorporated in other domains, the IBIGP technique is still in its infancy in the photovoltaic field. We will show, however, in this work that the IBIGP technique is a very promising tool for fault early detection enhancement.

show abstract

“…In a DC microgrid, solar power could not work stably. It would lead to damage to the converter, and even DC-link voltage fluctuation, causing grid fault [3]. Bidirectional isolated DC-DC converters can not only transmit power bidirectionally between DC buses of different voltage levels, but also have the advantages of higher power density, simple structure, and isolation, which have vital research value.…”

Section: Introductionmentioning

confidence: 99%

Optimal Asymmetric Duty Modulation for Dual Active Bridge Converters with DC Blocking Capacitors

Dai,

Liu,

Fang

et al. 2023

Energies

View full text Add to dashboard Cite

Aiming at the optimization of current stress with low voltage ratio and full ZVS, a control method combining variable duty cycle and phase shift was proposed based on dual active bridge (DAB) converters with DC blocking capacitors. By adding DC bias to the DC blocking capacitors, asymmetric duty modulation (ADM) can adjust the bias as needed. Based on the theoretical analysis of steady-state operation, the operating modes can be divided into eight modes. According to the features of each mode, equivalent circuits are established. The transmission power and the boundary of zero-voltage-switching (ZVS) are deduced through a detailed analysis of each mode. Based on the theoretical deduction, ADM is more suitable for a low voltage ratio. Verified by experiment, optimized asymmetric duty modulation (OADM) can increase efficiency by 3.58%, 6.57%, 8.81%, and 10.33% compared with DPS when P is equal to 0.36 and m is equal to 0.4, 0.3, 0.2, and 0.1, respectively. Using this method, the current stress of the converter is lighter than that under regular modulation when the voltage ratio m ≤ 0.5 with full ZVS.

show abstract

A Survey of Different DC Faults in a Solar Power System

Cited by 4 publications

References 35 publications

Photovoltaic system DC series arc fault: a case study

Photovoltaic system DC series arc fault: a case study

Fault detection in photovoltaic systems using the inverse of the belonging individual Gaussian probability

Optimal Asymmetric Duty Modulation for Dual Active Bridge Converters with DC Blocking Capacitors

Contact Info

Product

Resources

About