In this paper

the power quality problems of electrified railway is mainly introduced. The shortcoming of high voltage reactive power compensation device（referred to as TBB）and common thyristor controlled reactor（referred to as TCR）type static reactive compensation device（referred to as SVC）in V-V connection is pointed and the optimal solution is proposed through study

that is

the compact TCT type SVC is made up of two single-phase thyristor controlled transformer（referred to as TCT）which use common iron yoke

and two phase can be controlled independently and be used at certain power supply section. It is known throughout the data before and after operation of equipment that type TCT SVC has improved power factor

reduced the punished

improved the power quality and verified the correctness of the proposed method.