Adaptive and Robust Cross-Voltage-Level Power Flow Control of Active Distribution Networks

TL;DR

This paper proposes an adaptive, robust control system for managing power flow across different voltage levels in active distribution networks, enhancing stability and performance amid uncertainties.

Contribution

It introduces a gain scheduling-based adaptive control approach with a new parameter tuning method for cross-voltage-level power flow management in ADNs.

Findings

The control system improves robustness and performance in medium voltage grids.

The method effectively handles uncertainties in grid operation.

Time-domain simulations validate the control system's effectiveness.

Abstract

The large-scale integration of Distributed Energy Resources (DERs) into the electric power system offers new opportunities to ensure stability. For example, Active Distribution Networks (ADNs) can be used in (sub-)transmission systems in the emergency state, as far as high robustness and performance of the ADN control are guaranteed. This paper presents an adaptive control system for ADN's cross-voltage-level power flow control. For this purpose, the gain scheduling approach is used. Furthermore, this work introduces a method for control parameter tuning. In order to validate the control parameter tuning, the adaptive control system is analyzed regarding robustness and performance using an exemplary medium voltage grid. In addition, the influence of uncertainties is examined. Finally, the operation of the adaptive control system is demonstrated by performing time-domain simulations.