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Vol.3, No.1, 2024: pp.21-29

Protection coordination of photovoltaic power plant in the time domain

Authors:

Josip Čolak1
, Srete Nikolovski1
, Ružica Kljajić2
, Hrvoje Glavaš2

1EPIK Ltd., Našice, Croatia
2J. J. Strossmayer University of Osijek, Faculty of Electrical Engineering, Computer Science and Information
Technology, Osijek, Croatia

Received: 20 December 2023
Revised: 23 February 2024
Accepted: 15 March 2024
Published: 31 March 2024

Abstract:

The safety of workers and equipment in the power grid requires the shutdown of power plants in case of maintenance or malfunction. The shutdown relies on protective devices that must be properly coordinated to isolate only the part of the grid affected by the malfunction. Using the DIgSILENT PowerFactory software, an analysis was conducted on a model of an accurate real grid integrating a photovoltaic power plant with a capacity of 390 kW. Protection coordination testing was carried out for three-phase, two-phase, and single-phase short circuit currents at arbitrarily selected locations at medium and low voltage levels. Protection in the time domain is coordinated on lines and busbars to determine the speed and selectivity of protective devices. The analysis results indicate that adequately adjusting the three-phase short circuit at the main transformer output 110/10 kV with an impedance of 0 Ω and an allowed protection operation time of up to two seconds can be correctly addressed within 36.7 ms.

Keywords:

Renewable energy source, photovoltaic power plants, DIgSILENT PowerFactory software, coordination, fuses, relays, selectivity

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© 2024 by the authors. This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0)

Volume 3
Number 1
March 2024.

 

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How to Cite

J. Čolak, S. Nikolovski, R. Kljajić, H. Glavaš, Protection Coordination of Photovoltaic Power Plant in the Time Domain. Advanced Engineering Letters, 3(1), 2024: 21-29.
https://doi.org/10.46793/adeletters.2024.3.1.3

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