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Line Loss Minimization in Isolated Substations and Multiple Loop Distribution Systems Using the UPFC

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2 Author(s)
Sayed, M.A. ; Dept. of Electr. Eng., South Valley Univ., Qena, Egypt ; Takeshita, T.

This paper presents the line loss minimum condition in isolated substations and same substation multiple loop distribution systems by using the unified power flow controller (UPFC). In each case, the mathematical model is presented and the line loss minimum conditions are obtained based on the line parameters of the distribution feeders. Since multiple loop distribution system is fed from same substation, the line loss minimization can be achieved by compensating the summation of the line reactance voltage drop. In an isolated substation loop distribution system, the line loss minimization can be achieved by compensating the summation of the line reactance voltage drop in addition to the voltage difference of the substations. Realization of both cases can be achieved if the loop current is eliminated from the loop system. The series compensation technique applied by the UPFC is used to eliminate the loop current from the loop distribution system and hence minimize the total line loss. The effectiveness of the proposed control schemes of the UPFC have been verified experimentally.

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Power Electronics, IEEE Transactions on  (Volume:29 ,  Issue: 11 )