Journal of Electrical Engineering and Automation

With the rapid advancement of DC transmission technology, the IGBT series voltage equalization control of high-voltage DC circuit breakers has become crucial for ensuring stable system operation. In IGBT series applications, voltage imbalance caused by parameter differences and stray inductance can easily lead to device failure. This paper explains the mechanisms behind IGBT series voltage imbalance, analyzes static and dynamic equalization control strategies, and explores the roles of drive circuit optimization, buffer circuit design, and active control technology in equalization control. Research indicates that the combined use of multiple control strategies can significantly enhance equalization performance. This is of great significance for improving the performance of high-voltage DC circuit breakers and advancing DC transmission technology.

High-voltage DC circuit breaker; IGBT series; Equalization control; Drive circuit; Buffer circuit