Topologies of thyristor controlled reactor with reduced current harmonic content for static VAR compensators

This paper provides new topologies for thyristor controlled reactors (TCR) used for static VAR compensators (SVC). This paper explains the need for these new topologies by providing the harmonic analysis of each type. The conventional TCR, two parallel TCR, two tapped inductors TCR and three tapped inductors TCR are explained and evaluated to be impeded in the SVC system. The design of each type is provided to control the inductive reactive power of the SVC. The harmonic analysis of each topology is obtained to get the most proper TCR characteristics. The ratings of the each TCR components are provided. These new topologies may be a method to control the inductive reactive power of the SVC with limited harmonic content or even zero current harmonics.