Background for document preview
Background for thumbnail

High-voltage Thyristors for HVDC and Other Applications: Light-triggering Combined with Self-protection Functions

High-power thyristors with direct light-triggering and integrated protection functions can be utilized advantageously for applications in which several thyristors are connected in series. This applies in particular to High-Voltage DC (HVDC) transmission, Static Var Compensation (SVC), converters for medium voltage drives, and also to certain pulse power applications. Recent progress in both device innovations and optimization of some application systems is reviewed in this article. We first recapitulate the chosen design concept for the integration of direct light triggering and the protection functions. Then, we describe the details of an HVDC thyristor valve, and the advantages arising from the use of direct Light-Triggered Thyristors (LTTs) with integrated protection functions. Finally, we consider applications of direct LTTs in other high-voltage AC and DC applications.

• 117.45 KB
• 2014/02/11