In fixed compensation and thyristor controlled reactor constructed SVC system

the key factor for realizing reactive power compensation is how to accurately control thyristor controlled reactor. Therefore

generating robust and precise trigger pulse is critical to achieve this accurate control. In this paper

full digital trigger circuit is implemented with voltage frequency converter and complex programmable logic device

and pulse pair+ modulation mechanism are employed for optimal reliability. With this design

10 k Hz/V accurate control can be suc-cessfully achieved

which has got ideal effect in practical engineering.