光敏可控硅是一种特殊类型的可控硅.它有与电触发器件相同的伏安特性。但其触发方式则由光信号代替了电信号.这一特性。使光敏可控硅的触发 路与功率负载回路之间测实现完全的电绝缘,从而大大提高了自动控制系统的稳定性和可靠性. 近年来,为了能在高压直流传输线系统中得到应用 Phototriac is a special type of thyristor that has the same volt-ampere characteristics as the electrical trigger. However, the trigger mode is replaced by the optical signal electrical signal. This feature. So that the photosensitive thyristor trigger circuit and the power load circuit between the test to achieve complete electrical insulation, thus greatly improving the stability and reliability of the automatic control system.In recent years, in order to be able to HVDC transmission line system is applied