Identification of maximum loadability in power system with line outages using chaotic mutation immune evolutionary programming / Sharifah Azma Syed Mustaffa, Ismail Musirin and Muhammad Murtadha Othman

Recently, the sudden rise of demand for electricity
leads to the voltage instability in power system which consequently
affects the maximum loadability of the system. Therefore, it is
crucial to solve the voltage stability problem and keep the voltage
profile within the limit. The presence of line outage contingency
also affects the voltage stability of the system. This paper proposes
a new algorithm namely Chaotic Mutation Immune Evolutionary
Programming (CMIEP) for maximum loadability under N-1
contingency in a transmission system. The formulation of the
contingency analysis and the constraints are initially presented.
Next, the ranking process was performed based on the predeveloped voltage stability index termed as Fast Voltage Stability
Index (FVSI) to identify the most critical line outage for the system
during N-1 contingency. IEEE 30-bus Reliability Test System
(RTS) was utilized to test the proposed technique. The obtained
results show the effectiveness of the proposed optimization
technique and successively able to compute maximum loadability
of the optimal bus during N-1 contingency.