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Open AccessConcept Paper

Overview on Grid-Forming Inverter Control Methods

Power System Stability and Converter Technology Division, Fraunhofer Institute for Energy Economics and Energy System Technology IEE, 34119 Kassel, Germany
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Energies 2020, 13(10), 2589; https://doi.org/10.3390/en13102589
Received: 29 February 2020 / Revised: 24 April 2020 / Accepted: 6 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Modern Power System Dynamics, Stability and Control)
In this paper, different control approaches for grid-forming inverters are discussed and compared with the grid-forming properties of synchronous machines. Grid-forming inverters are able to operate AC grids with or without rotating machines. In the past, they have been successfully deployed in inverter dominated island grids or in uninterruptable power supply (UPS) systems. It is expected that with increasing shares of inverter-based electrical power generation, grid-forming inverters will also become relevant for interconnected power systems. In contrast to conventional current-controlled inverters, grid-forming inverters do not immediately follow the grid voltage. They form voltage phasors that have an inertial behavior. In consequence, they can inherently deliver momentary reserve and increase power grid resilience. View Full-Text
Keywords: droop control; grid-forming inverter; electrical inertia; inverter-dominated power system; virtual synchronous machine; voltage-controlled inverter; voltage-forming inverter droop control; grid-forming inverter; electrical inertia; inverter-dominated power system; virtual synchronous machine; voltage-controlled inverter; voltage-forming inverter
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MDPI and ACS Style

Unruh, P.; Nuschke, M.; Strauß, P.; Welck, F. Overview on Grid-Forming Inverter Control Methods. Energies 2020, 13, 2589.

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