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Reactive-power dispatch by successive quadratic programming

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2 Author(s)
Quintana, V.H. ; Dept. of Electr. Eng., Waterloo Univ., Ont., Canada ; Santos-Nieto, M.

The reactive-power dispatch is formulated as the minimization of real-power losses in the system, utilizing a full set of control variables: generator voltages, switchable shunt susceptances, and transformer taps. The solution of the loss problem is obtained by successively solving quadratic programming problems. First- and second-order loss sensitivity coefficients are derived for the quadratic problem formulation. The derivations are based on the Jacobian method for sensitivity calculations. Sensitivity relations for the dependent constraints are based on the complete reactive-power model of the fast decoupled load flow method. The active-set projection method for quadratic programming is described and utilized as the solution algorithm for the quadratic reactive-power dispatch problems. Tests are conducted on the IEEE 30-bus and Mexican 253-bus systems. The computer results are discussed

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Energy Conversion, IEEE Transactions on  (Volume:4 ,  Issue: 3 )