Effect on fault current lever reduction by using resistive fault current limiter in 110 kV Binh an substation

Abstract

In the context of development quickly in recent period, electric power system in Viet Nam, with the power system load increases fastly, this resulted in the phenomenon of increased short circuit current value (NM) on grid. The fast development of the power source in recent period and the increasing power system load have led to rapid rising of short circuit current value on the grid. It existed already many points on the grid where short circuit current values exceed the allowed value. [1]. This article aims at searching, giving out the solutions for limiting the short circuit current on Viet Nam grid by installing a Resistive Fault Current Limiter (R-FCL) into neutral conductor of the transformer. This solution is carried out with the following steps: (1)establishing calculating method for installed resistant value, (2) Simulating grid involved resistive current fault limiter, (3) installing limiter apparatus on the real grid with the Resistant product provided by Bolid manufacturer[2], (4) Comparing the experimental result with the simulating results with the simulating results. This would give out the solution for limiting short circuit current applied in a case on Viet Nam grid-110 Kv Binh An transformer substation. The results have shown high effectiveness of applying R-FCL on Viet Nam grid.