Combined bus splitting and line bypassing for short-circuit currents limitation

When a fault occurs in the power system, it causes a high short-circuit currents which over circuit breaker rate. This paper proposes solutions to limit high short-circuit currents using bus splitting and line bypassing. Both of solution methods are the restructuring of the network, stability of the system must be changed. Therefore, the stability has to be measured by PQ voltage stability index. There are four test cases to compare the result that consist of base case, short-circuit currents limitation using only bus splitting, short-circuit currents limitation using only line bypass and short-circuit currents limitation using both of bus splitting and line bypassing. The result show that all of the proposed methods can be reduced the short-circuit currents which been in range of circuit breaker limit. This paper has been tested on the modified IEEE 24 bus reliability test system.