Second-order LADRC to enhance Droop-based Grid-Forming converters in inductive networks

Delhaye, Quentin;De Jaeger, Emmanuel
(2025) POWERTECH2025 — Location: Kiel (29.June.2025)

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With the rise of power electronics, Grid-Forming (GFM) converter controls are proposed to control the voltage magnitude and frequency. These controls are able to provide a virtual inertia to stabilize the frequency. However, the majority of these control dynamics depends on the state of the power system network (e.g. the power system reactance). This depen- dance is not suitable for Grid-Forming controls. Some network states may infringe the IEEE 2800-2022 standard. To solve this issue, this work proposes a Linear Active Disturbance Rejection Control (LADRC) for Droop-based Grid-Forming controls. Its use enhances the responsiveness and robustness of Droop-based Grid-Forming controls. This work shows that by using LADRC in Grid-Forming converters a robust active power response is obtained regarding grid reactance variations in inductive networks. This robust behaviour is developed in detail through its mathematical formulation and numerical simulations.
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Delhaye, Q., & De Jaeger, E. (2025). Second-order LADRC to enhance Droop-based Grid-Forming converters in inductive networks. POWERTECH2025, Kiel. https://hdl.handle.net/2078.5/251732