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Optimal Power Flow Solutions

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2 Author(s)
Dommel, H.W. ; Bonneville Power Administration ; Tinney, W.F.

A practical method is given for solving the power flow problem with control variables such as real and reactive power and transformer ratios automatically adjusted to minimize instantaneous costs or losses. The solution is feasible with respect to constraints on control variables and dependent variables such as load voltages, reactive sources, and tie line power angles. The method is based on power flow solution by Newton's method, a gradient adjustment algorithm for obtaining the minimum and penalty functions to account for dependent constraints. A test program solves problems of 500 nodes. Only a small extension of the power flow program is required to implement the method.

Published in:

Power Apparatus and Systems, IEEE Transactions on  (Volume:PAS-87 ,  Issue: 10 )