Control Design and Voltage Stability Analysis of a Droop-Controlled Electrical Power System for More Electric Aircraft

TLDR

The study examines a single‑bus, multigenerator electrical power system for future more‑electric aircraft. The authors propose a detailed control‑design procedure and stability analysis to enable an optimally stable single‑bus EPS. They derive the source‑output and load‑input impedances, analyze stability under constant‑power loads, and assess how the number of parallel sources and power‑sharing ratios affect stability. Experimental results confirm the validity of the proposed analysis and control design.

Abstract

This paper focuses on the analysis of a single dc bus multigenerator electrical power system (EPS) for future more electric aircraft. Within such a single bus paradigm, the paper proposes a detailed control design procedure and provides a stability analysis based on the derivation of the output impedance of the source subsystem and input impedance of the load subsystem, including control dynamics. The single bus characteristic is analyzed and the stability properties of the EPS are investigated when supplying constant power loads. In addition, the paper highlights the impact on stability of the number of parallel sources and of the power sharing ratio. The theoretical analysis is instrumental in designing an optimally stable single dc bus EPS. The key findings are validated by experimental results.