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Real-Time Voltage Regulation in Power Distribution System Using Fuzzy Control

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4 Author(s)
Spatti, D.H. ; Dept. of Electr. Eng., Univ. of Sao Paulo, Sao Carlos, Brazil ; da Silva, I.N. ; Usida, W.F. ; Flauzino, R.A.

Two different fuzzy approaches to voltage control in electric power distribution systems are introduced in this paper. The real-time controller in each case would act on power transformers equipped with under-load tap changers. Learning systems are employed to turn the voltage-control relays into adaptive devices. The scope of this study has been limited to the power distribution substation, and the voltage measurements and control actions are carried out on the secondary bus. The capacity of fuzzy systems to handle approximate data, together with their unique ability to interpret qualitative information, make it possible to design voltage-control strategies that satisfy the requirements of the Brazilian regulatory bodies and the real concerns of the electric power distribution companies. Fuzzy control systems based on these two strategies have been implemented and the test results were highly satisfactory.

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Power Delivery, IEEE Transactions on  (Volume:25 ,  Issue: 2 )