An Analysis of Superconducting Fault Current Limiter For Stabilization Of Synchronous Generators

Abstract

As power system in Japan are becoming larger and larger, measures against generator stability problems are expected to be more serious. On the other hand, in recent years researches on superconducting fault current limiter are moving forward in accordance with the advancement of superconducting technology. As regards to the problems of generator stability with superconducting fault current limiters, a lot of literatures exist, but they have a very few analyses in terms of instantaneous values. This paper analyzes the effects of the limiter in terms of instantaneous values on enhancement of generator transient stability and control of turbine shaft torque as well as control of fault current. Three types of fault current limiters are considered in this paper: i. e., resistance type, inductance type and resistance + inductance type. It is concluded in this paper that the resistance type fault current limiter is most effective for the three purposes stated above.