Self‐synchronising virtual induction generator without phase‐locked loop and proportional–integral regulators

Shah, Priyank; Singh, Bhim

doi:10.1049/iet-gtd.2019.1942

Cited by 3 publications

(2 citation statements)

References 35 publications

(85 reference statements)

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“…‚ In contrast to [27], [28] where the VSC control design has been entirely reformulated to accommodate the IM model, we show that the VIM concept can be incorporated into the grid-following converter control as an independent synchronization unit, with system and devicelevel control preserved. Therefore, potential integration of this concept into the existing grid-following VSCs is substantially facilitated.…”

Section: Introductionmentioning

confidence: 87%

“…Contrarily, a recently proposed VSC control method under the name of inducverter introduces the notion of a gridconnected converter operating under Induction Machine (IM) working principles and without a dedicated PLL unit. It was first introduced in [27], and later further analyzed in [28], [29]. Despite the concept still being at its early stages, it can potentially resolve the issues associated with the conventional PLL-based synchronization loop.…”

Section: Introductionmentioning

confidence: 99%

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Improving Stability of Low-Inertia Systems Using Virtual Induction Machine Synchronization for Grid-Following Converters

Stanojev

Markovic

Aristidou

et al. 2023

IEEE Trans. Power Syst.

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This paper presents a novel strategy for the synchronization of grid-following Voltage Source Converters (VSCs) in power systems with low rotational inertia. The proposed synchronization unit is based on emulating the physical properties of an induction machine and capitalizes on its inherent grid-friendly properties such as self-synchronization, oscillation damping, and standalone capabilities. To this end, the mathematical model of an induction machine is analyzed and reformulated to obtain the unknown grid frequency by processing the voltage and current measurements at the converter output. This eliminates the need for a Phase-Locked Loop (PLL) unit, traditionally employed in grid-following VSC control schemes, while simultaneously preserving the system-and device-level control. Furthermore, we provide the appropriate steps for obtaining an index-1 DAE representation of the induction-machine-based synchronization unit, suitable for stability analysis. Our analysis shows that replacing the PLL unit with the virtual induction machine-based synchronization may considerably improve the stability of systems with grid-following converters and facilitate the frequency containment. Furthermore, we validate the performance of the proposed synchronization unit through simulations and provide recommendations for its tuning.

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%