Innovative Energy Management System for MVDC Networks with Black-Start Capabilities

Abdulrahman Alassi, Khaled Ahmed, Agustí Egea-Àlvarez and Omar Ellabban
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Abdulrahman Alassi: Iberdrola Innovation Middle East, Doha 210177, Qatar
Khaled Ahmed: Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, UK
Agustí Egea-Àlvarez: Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, UK
Omar Ellabban: Iberdrola Innovation Middle East, Doha 210177, Qatar

Energies, 2021, vol. 14, issue 8, 1-21

Abstract: Medium voltage DC (MVDC) networks are attracting more attention amid increased renewables penetration. The reliability of these DC systems is critical, especially following grid contingencies to maintain critical loads supply and provide ancillary services, such as black-start. This paper proposes an innovative energy management system (EMS) to maintain reliable MVDC network operation under prolonged AC grid contingencies. Similar EMS designs in literature tend to focus on limited operating modes and fall short of covering comprehensive elongated blackout considerations. The proposed EMS in this paper aims to preserve the distribution network functionality of the impacted MVDC system through maintaining a constant DC bus voltage, maximizing critical load supply duration, and maintaining the MVDC system black-start readiness. These objectives are achieved through controlling generation units between Maximum Power Point Tracking (MPPT) and Voltage Regulation (VR) modes, and implementing a smart load shedding and restoration algorithm based on network parameters feedback, such as storage State of Change (SoC) and available resources. Practical design considerations for MVDC network participation in AC network black start, and the following grid synchronization steps are presented and tested as part of the EMS. The proposed system is validated through simulations and scaled lab setup experimental scenarios.

Keywords: energy management system; power balance; DC networks; MVDC distribution; collector grids; power sharing; black-start; grid synchronization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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