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

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

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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.

Inspec keywords: distribution networks; voltage control; Newton-Raphson method; power system control

Other keywords: tap-changing transformers; radial distribution network; minimal transformer tap changes; voltage control; nonlinear constraint optimisation; energy control centres; minimisation algorithm; Newton-Raphson method

Subjects: Control of electric power systems; Power system management, operation and economics; Voltage control; Distribution networks

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