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Voltage control by tap-changing transformers for a radial distribution network

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3 Author(s)
Salem, M.R. ; Dept. of EEE, Omar Al-Mokhtar Univ., Al Bayda, Libya ; Talat, L.A. ; Soliman, H.M.

Voltage control is of interest to many researchers, and is currently being considered by many utilities for implementation in their energy control centres. Transformers with tap-changing facilities constitute an important means of controlling voltage throughout the system at all voltage levels. A new method for determining the minimal changes in transformer taps to control voltage levels is presented. The problem to be solved is cast into a nonlinear constraint optimisation. The constraints are tackled in the minimisation algorithm by forming the Lagrangian. Necessary conditions for optimality are derived and solved using the Newton-Raphson method

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Generation, Transmission and Distribution, IEE Proceedings-  (Volume:144 ,  Issue: 6 )