Application of fuzzy-analytic hierarchy process algorithm and fuzzy load profile for load shedding in power systems

• The Fuzzy AHP (FAHP) is applied to determine the important factor of the load nodes.
• The FAHP combines with the fuzzy logic for load profile to draw out the suitable control strategies for various load levels in case of emergency.
• The load shedding consider to the important factor of loads to cut the less important loads before, and reduce damages.
• The proposed algorithm shows performance better than AHP and other methods.

In an electrical competitive market, load shedding decision support systems are needed to find the ways to process load shedding to satisfy both economic and technical conditions. This paper proposed the Fuzzy Analytic Hierarchy Process algorithm (Fuzzy-AHP) and fuzzy logic for load profile approach to determine the weight of the load nodes of the system and select the control strategy when the system operates at various load levels. Weights of the load nodes were calculated by triangular fuzzy numbers in the pair comparison. These results combined with the fuzzy logic for load profile to draw out the suitable control strategies for various load levels in case of emergency. The effectiveness of the algorithm was demonstrated through the experiment of load shedding of IEEE 37 bus compared with traditional AHP algorithm.