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Wyszukujesz frazę "grounding system" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Problems and counter measures of arc suppression coilin 10 kV distribution system
Autorzy:
Ni, Hui
Ding, Pei
Ma, Yunlong
Ai, Shaogui
Ma, Feiyue
Zhang, Qingping
Powiązania:
https://bibliotekanauki.pl/articles/141485.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
arc suppression coil
capacitive current
artificial grounding fault test
neutral non-effective grounding system
Opis:
The arc suppression coil determines whether it can effectively extinguish the arc when it is grounded in the neutral non-effective grounding system. An artificial grounding test is an importantway to verify its performance. In this study, 13 substations with the 10 kV system in the Ningxia areawere selected and considered. Based on the artificial single-phase grounding test, the residual current, the compensation current and the off-resonance degree were measured in the arc suppression coil, and the performance of the arc suppression coil in the 10 kV system was verified. The experimental results show that the error of arc suppression coil automatic measurement is large, the off-resonance degree is large, the resistive component in the compensation current is excessive, the harmonic component exists in the compensating current and capacitive current. To solve these problems, this paper puts forward the corresponding countermeasures for reference.
Źródło:
Archives of Electrical Engineering; 2019, 68, 1; 135-146
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the effectiveness of lightning and surge protection in a large solar farm
Autorzy:
Sobolewski, Konrad
Sobieska, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/2086693.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ANSYS simulations
electric safety
grounding system
magnetic field distribution
lightning modeling
lightning protection
photovoltaic power plant
Opis:
The aim of the considerations presented in the article was a stand-alone groundbased photovoltaic power plant. The article is devoted to the qualitative analysis of some lightning protection configurations. These types of constructions often require an individual look at the design and execution of lightning protection installations, which causes problems with the selection of optimal solutions. These problems relate primarily to the way the lightning rods are arranged to create protection zones, but also to the way they are attached: to the supporting structure for PV modules or as free-standing. Another problem raised in the article is the way how lightning current is discharged from rods to the ground and how it is dispersed there. Due to the vast area of such facilities and the requirements for electrical safety, it is necessary to consider and design a ground system with optimal electrical parameters, but also technical and economic ones. All these elements have their impact on the value of voltages induced in the electrical installation, which is also presented in the content of the article as the magnetic field distribution and calculation of induced voltages in an exemplary configuration. Finally, this article will compare described technical solutions encountered in selecting the best protection method for this type of photovoltaic installation.
Źródło:
Archives of Electrical Engineering; 2022, 71, 2; 523--542
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction of the step voltages of MV/LV substation grounding system based on shaping electric field
Autorzy:
Sikora, Roman
Markiewicz, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/1841172.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
grounding system
step voltage
touch voltage
IEEE 80-2013 standard
system uziemiający
napięcie krokowe
napięcie dotykowe
Standard IEEE 80-2013
Opis:
The article presents the analysis results of the effectiveness limitation of the step voltage by forming an electric field on the ground surface. For shaping the electric field, a method consisting of screens placed around the point of the earth current flow was used. The analysis was performed using an example of an MV/LV substation grounding system. This research was conducted applying a mathematical model of the grounding system and screens by means of the finite element method. The influence of metal, insulating screens and surface material on the step/touch voltage values for the considered grounding system was estimated. Most of the methods described can be applied in practice. In the opinion of the authors, the method of using screens made of insulating and conductive materials has not been sufficiently described in the literature. Moreover, in the available literature there is no in-depth analysis of the described electric field shaping methods.
Źródło:
Archives of Electrical Engineering; 2021, 70, 3; 601-613
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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