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Energies 2019, 12(3), 552; https://doi.org/10.3390/en12030552

Evaluation of the Impact of High Penetration Levels of PV Power Plants on the Capacity, Frequency and Voltage Stability of Egypt’s Unified Grid

1
College of Engineering at Wadi Addawaser, Prince Sattam bin Abdulaziz University, 11991 Wadi Aldawaser, Saudi Arabia
2
Electrical Engineering Department, Faculty of Engineering, Minia University, 61111 Minia, Egypt
3
Department of Electrical Power Systems, Moscow Power Engineering Institute “MPEI”, 111250 Moscow, Russia
4
Electrical Engineering Department, Aswan Faculty of Engineering, Aswan University, 81542 Aswan, Egypt
5
Electrical Engineering Department, University of Medical Sciences & Technology, 79371 Khartoum, Sudan
*
Authors to whom correspondence should be addressed.
Received: 31 December 2018 / Revised: 30 January 2019 / Accepted: 6 February 2019 / Published: 11 February 2019
(This article belongs to the Special Issue Photovoltaic and Wind Energy Conversion Systems)
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Abstract

In this paper, the impact of integrating photovoltaic plants (PVPs) with high penetration levels into the national utility grid of Egypt is demonstrated. Load flow analysis is used to examine the grid capacity in the case of integrating the desired PVPs and computer simulations are also used to assess the upgrading of the transmission network to increase its capacity. Furthermore, the impact of increasing the output power generated from PVPs, during normal conditions, on the static voltage stability was explored. During transient conditions of operation (three-phase short circuit and outage of a large generating station), the impact of high penetration levels of PVPs on the voltage and frequency stability has been presented. Professional DIgSILENT PowerFactory simulation package was used for implementation of all simulation studies. The results of frequency stability analysis proved that the national grid could be maintained stable even when the PVPs reached a penetration level up to 3000 MW of the total generation in Egypt. Transmission network upgrading to accommodate up to 3000 MW from the proposed PV power plants by 2025 is suggested. In addition, analysis of voltage stability manifests that the dynamic behavior of the voltage depends remarkably on the short circuit capacity of the grid at the point of integrating the PVPs. View Full-Text
Keywords: photovoltaic; voltage stability; grid capacity; penetration level; frequency stability; Egypt’s national grid photovoltaic; voltage stability; grid capacity; penetration level; frequency stability; Egypt’s national grid
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Sultan, H.M.; Diab, A.A.Z.; Kuznetsov, O.N.; Ali, Z.M.; Abdalla, O. Evaluation of the Impact of High Penetration Levels of PV Power Plants on the Capacity, Frequency and Voltage Stability of Egypt’s Unified Grid. Energies 2019, 12, 552.

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