کنفرانس بین المللی ماشین و محرکه های الکتریکی

صفحه اصلی / The 5th International Conference on Electrical Machines and Drives

Impact of Bridge and Linear De-Energized Tap Changer on Transformer Short-Circuit Impedance: An Analytical Approach

نویسندگان :

Mahsa Taghilou¹ Mojtaba Mirsalim²

1- Department of Electrical Engineering Amirkabir University of Technology 2- Department of Electrical Engineering Amirkabir University of Technology

کلمات کلیدی :

De-energized tap changer،impedance،linear DETC،bridge DETC،axial magnetic field،radial magnetic field

چکیده :

De-energized tap changers (DETCs) offer a cost-effective means of voltage regulation in transformers with steady load conditions, serving as an alternative to on-load tap changers (OLTCs). Unlike separate DETC units, integrated DETC designs are embedded into the main winding structure, where the introduction of air gaps results in non-uniform ampere-turn distributions. This structural difference alters the impedance profile, increasing radial leakage reactance. Elevated impedance can enhance eddy current and stray losses, thereby raising overall load losses and operating temperatures, which may necessitate additional cooling provisions and impact long-term reliability. This paper investigates the impact of integrated linear and bridge DETC configurations on transformer impedance. An analytical modeling framework is proposed for both configurations, with impedance behavior evaluated to highlight performance and design implications.