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Stability is the ability of a power system to maintain steady and acceptable limits and standards of performance parameters such as voltage and load angle at all buses under both normal and abnormal (faulty) network conditions [25]. The load on the distribution network shows conscious behavior due to variations in consumer demands. In certain industrial as well as domestic areas, it is often observed that under certain critical loading conditions and faulty situations the distribution system experiences a voltage collapse, which is also called an instability or unstable operation of the system. The main factor causing voltage instability is the inability of power systems to comply with the demand of reactive power and maintenance of required parameter, demand load correlation [26].