Characteristics of a FCL Applying Fast Interrupter According to the Current Limitation Elements

Abstract

-With the development in industry, power demand has increased rapidly. As consumption of power has increased, Demand for new power line and electric capacity has risen. However, in the event of fault, problems occur in extending the range of fault coverage and increasing fault current. In these reasons, protection devise is recognized as the prevention of an accident and fault current. This paper dealt with minimizing fault propagation and limiting fault current by adjusting fault current limiter (FCL) with fast interrupter. At this point, we compared and analyzed characteristics between non-inductive resistance and fault current which is limited by superconducting units. In normal state of the power system, power was supplied to the load, but when fault occurred, the interrupter was operated as CT which detected the over-current. Its operation made the limitation of fault current through a FCL. We concluded that the limiter using superconducting units was more efficient with the increase of power voltage. Superconducting fault current limiter with the fast interrupter prevented the spread of a fault, and improved reliability of power system.

Operation characteristics of a fault current limiter by high speed interrupter and a superconducting element

“…If the magnitude of the increased ground fault current exceeds the breaking capacity of existing breakers, it may propagate troubles to the breakers and power equipment around the troubled area. Furthermore, there is a greater possibility of secondary accidents like power failures in wide areas [1][2][3][4][5]. As the breaking level of breakers is exceeded to result in reduced power supply reliability and stability, there is an urgent need of tackling the issues.…”