Artificial Immune-Based For Voltage Stability Prediction In Power System

Voltage instability has recently become a challenging problem for many power system operators. This phenomenon has been reported to be responsible for severe low voltage condition leading to majo r blackouts. This paper presents the application of Artificial Immune Systems (AIS) for online voltage stability evaluation that could be used as early warning system to the power system operator so that necessary action could be taken in order to avoid the occurrence of voltage collapse. Key features of the proposed method are the implementation of clonal selection principle that has the capability in performing pattern recognition task. The proposed technique was tested on the IEEE 30 bus power system and the results shows that fast performance with accurate prediction for voltage stability condition of the system was obtained. In order to realize the superior features of AIS, a comparative study was conducted with Artificial Neural Network (ANN)-based prediction system. This system was developed to perform similar task on the same test system.