Study of Inverter Control Strategies on the Stability of Low-Inertia Microgrid Systems

Wang, Jing; Saraswat, Govind

doi:10.1109/iecon49645.2022.9968525

Cited by 3 publications

(1 citation statement)

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“…The strategic placement of GFM and GFL inverters enhances the V-f dynamic response, demand-supply stability, and inertial response of the PEDG [5]. Various studies have also explored that advanced functions such as damping [6] and virtual inertia emulation [7] via a fleet of GFM inverters enhance the system's stability. However, a PEDG network containing 100% GFM inverters may introduce its own set of challenges related to synchronization, circulating reactive powers, unregulated power sharing, etc.…”

Section: Introductionmentioning

confidence: 99%

Towards Resiliency Enhancement of Network of Grid-Forming and Grid-Following Inverters

D’silva

Zare

Shadmand

et al. 2024

IEEE Trans. Ind. Electron.

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This paper proposes an autonomous control scheme to mitigate voltage-frequency excursions observed in a network of grid forming (GFM) and grid following (GFL) inverters in a power electronics dominated grid (PEDG). The proposed control scheme leverages GFL inverter's ability to dynamically adjust their power set-points as well as change their operation mode on-the-fly to enhance the PEDG resiliency. A supervisory controller (SC) comprising of a Droop-ΔP estimator coupled with an optimal power allocator (OPA) module dynamically adjusts the power injections from GFL inverters to maintain the power balance and restore frequency in response to disturbances. Moreover, the proposed self-ranking based coordinated mode selection (SR-CMS) algorithm dynamically reconfigures the inverter's operation mode (either GFM or GFL) to enhance the PEDG resiliency in response to events and ensure GFM inverter allocation in grid clusters. Several case studies are performed to validate the feasibility, performance, and robustness of proposed autonomous control. Finally, the proposed scheme is experimentally validated on a small-scale hardware testbed.

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Section: Introductionmentioning

confidence: 99%