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A new technique for loss reduction using compensating capacitors applied to distribution systems with varying load condition

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3 Author(s)
Abdel-Salam, T.S. ; Dept. of Electr. Eng., Windsor Univ., Ont., Canada ; Chikhani, A.Y. ; Hackam, R.

A new method based on a heuristic technique for reactive loss reduction in distribution network is presented. This method allocates capacitors to certain nodes (sensitive nodes) which are selected by first identifying the branch which has the largest losses due to reactive power. Then, the node therein, which has the largest reactive power is selected. The capacitor rating is determined by differentiating the system losses with respect to the load connected to that node. The compensating capacitors are placed at these optimal locations with appropriate VAr ratings to achieve maximum benefits in dollar savings. The variation of the load during the year is considered. The capital and installation costs of the capacitors are also taken into account. This method is applied to a 38 feeder distribution system of 27.6 kV, 560 MVA of the city of Windsor, Ontario, resulting in annual saving of about CAN $145000 after amortizing the capital and installation costs of applying the compensating capacitors, and using a figure for the cost of energy of 1.986 cents per kWh

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Power Delivery, IEEE Transactions on  (Volume:9 ,  Issue: 2 )