Fuzzy logic application in load flow studies

Fuzzy logic is used to solve the load flow problem, so decreasing computing time. Consequently, the repetitive solution of the proposed fuzzy load flow (FLF) method requires only 2 m calculations per iteration, where m is the number of buses of the system. In the FLF method, the real and reactive power mismatches per voltage magnitude at each node of the system are chosen as the crisp input values, which are fuzzified into the fuzzifier. The process logic uses a rule base to explode the fuzzy output signals, which are defuzzified and the crisp values are chosen as the corrections of voltage angle and magnitudes at each node of the system. The efficiency of the proposed method is demonstrated on various test systems.