کنفرانس بین المللی ماشین و محرکه های الکتریکی

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

Optimization of the Magnetic, Fast and Controllable Commutation Switch for Hybrid DC Circuit Breaker

نویسندگان :

Alireza Jaafari¹ Amir Sadeghi-Bahmani² Sadegh Mohsenzade³ Ali A Razi-Kazemi⁴

1- Electrical Engineering Departmentent K. N. Toosi University of Technology Tehran, Iran 2- Electrical Engineering Departmentent K. N. Toosi University of Technology Tehran, Iran 3- Electrical Engineering Departmentent K. N. Toosi University of Technology Tehran, Iran 4- Electrical Engineering Departmentent K. N. Toosi University of Technology Tehran, Iran

کلمات کلیدی :

DC Circuit Breakers،Saturation Magnetization،Magnetic Flux Leakage،Leakage Inductance،Finite Element (FE)،Load Commutation switch (LCS)

چکیده :

A hybrid DC circuit breaker (HDCCB) as the applicable protection tool employs a load commutation switch (LCS) for commutation of the fault current from the path, including a mechanical switch to the interruption branch. In high-current DC networks such as traction applications, the power loss of LCS can be considered in the permanent close state, which results in a reliability decrement and hard thermal management of the semiconductor devices. This paper presents an HDCCB with a magnetic switch (MS) as an LCS to decrease the power loss during normal operation. This MS consists of two windings. While the first one has a single-turn winding placed in the main network current path, the second winding is connected to a control voltage source to give the DCCB the ability to adjust the speed of the LCS in the commutation of the current. The main contribution of the proposed structure is a significant reduction of power loss compared with other methods (0.072% of other methods). In addition, controllability in LCS speed and reliability improvement are other distinguishing features of this DCCB. The proper operation of the proposed current commutator MS on DCCB is evaluated using Finite Element (FE) simulations (Ansys Maxwell).