间隙触发装置(GTED)在串补工程中有着非常重要的作用,它的设计思路是否合理,性能是否可靠,直接决定着整个系统的稳定性。详细介绍了基于复杂可编程逻辑器件(CPLD)的GTED的激光供电取能、状态监视和触发间隙等的原理,并通过大量的间隙触发试验,说明了设计过程中应该重点解决的抗干扰等问题。 Gap triggering device (GTED) plays a very important role in the series compensation project. Its design idea is reasonable and its performance is reliable, which directly determines the stability of the whole system. The principles of laser power take-off, condition monitoring and triggering gap of GTED based on complex programmable logic device (CPLD) are introduced in detail. Through a large number of gap trigger tests, the problems of anti-interference which should be mainly solved in the design process are described .