Resonances and Oscillations in DC Grids
Conference: PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/06/2025 - 05/08/2025 at Nürnberg, Germany
doi:10.30420/566541322
Proceedings: PCIM Conference 2025
Pages: 8Language: englishTyp: PDF
Authors:
Effenberger, Thomas; Stubenrauch, Franz; Dechant, Eduard; Heldwein, Marcelo Lobo
Abstract:
A trend has been emerging in the field of industrial automation: direct current (DC) is making a comeback. This is due to the desire for greater energy efficiency and flexible, intelligent energy distribution. However, DC can still exhibit alternating current (AC) components from pulsating loads on an industrial grid, which may excite resonances. This work derives an equivalent circuit model for the grid and verifies it using a motor test bench. Design considerations for the DC link capacitance are presented to enable the integration into a decentralized drive.