Abstract
The stable operation of an islanded microgrid powered by multiple distributed energy sources (DESs) depends on the control of the voltage magnitude, the frequency and the power-sharing among the DESs. Uncontrolled power-sharing among sources can lead to voltage and frequency stability issues characterized by poorly damped oscillations. To achieve efficient power-sharing, a level-one control strategy is required. This paper proposes a communication-less hybrid control strategy to implement power-sharing regardless of the inverter output impedance. In this strategy, the power-sharing control is achieved with the inverters in both grid-forming and grid-following control modes - in particular, for the sources interfaced with rotating machines. Simulation results show that the instantaneous power-sharing is correctly carried out while maintaining the RMS voltage at the required value. Furthermore, the voltage drops remain within the 10% admissible range.
Original language | English |
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DOIs | |
Publication status | Published - 2023 |
Event | 31st Southern African Universities Power Engineering Conference, SAUPEC 2023 - Johannesburg, South Africa Duration: 24 Jan 2023 → 26 Jan 2023 |
Conference
Conference | 31st Southern African Universities Power Engineering Conference, SAUPEC 2023 |
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Country/Territory | South Africa |
City | Johannesburg |
Period | 24/01/23 → 26/01/23 |
Keywords
- AC microgrid
- grid-following
- grid-forming
- inverter
- power-sharing control
ASJC Scopus subject areas
- Computer Networks and Communications
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Electrical and Electronic Engineering
- Safety, Risk, Reliability and Quality