CUED Publications database

Optimization of gate commutated thyristors for hybrid DC breakers

Lyu, G and Yu, Z and Zeng, R and Liu, J and Zhang, X and Long, T and Palmer, P (2017) Optimization of gate commutated thyristors for hybrid DC breakers. IET Power Electronics. ISSN 1755-4535 (Unpublished)

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Abstract

Hybrid DC Breakers (HCBs) are crucial components in modern DC systems. Integrated Gate Commutated Thyristors (IGCTs) are widely used in high voltage HCBs due to their controllable turn-off capabilities under high power conditions. The focus of this paper is on the optimization of Gate Commutated Thyristors (GCTs) for HCB applications, including operation temperature and design parameters. The considerations of GCT design and operating conditions for the use in HCBs are discussed. Under those considerations, a 2-D finite element model of GCT is developed to investigate the influence of the GCT design parameters on the Maximum Controllable Current (MCC) and the Safe Operation Area (SOA). Impedance unevenly distributed along the full wafer has been calculated to obtain accurate simulation results. Results show that the P+-base, lifetime, and the distance between cathode and gate metallization can all affect the MCC. In addition, GCTs can provide a higher MCC by operating at a higher temperature.

Item Type: Article
Uncontrolled Keywords: optimisation thyristor applications circuit breakers finite element analysis
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Div B > Photonics
Depositing User: Cron Job
Date Deposited: 16 Aug 2017 20:06
Last Modified: 12 Oct 2017 01:52
DOI: