AREA AUTOMATIC-CONTROL OF VOLTAGE AND REACTIVE POWER USING A MULTIVARIABLE APPROACH

The first part of the paper describes a procedure for determining the regulating parameters, regulating areas and regulating generators nece ssary for area automatic control of AVR (AAC). The principle of AAC is to divide the power network into distinct geographical parts called ' 'regulation areas'', and to control the area node voltages and reactiv e power exchange separately in each regulating area by automatic adjus tments of the automatic voltage regulator of selected units, called '' regulating generators'' located in the regulating area. The second par t of the paper describes a design procedure for decentralized regulato rs used for the area node voltage and reactive power exchange control in distinct geographical areas of a power network, called ''regulation areas''. The method uses modern multivariable systems and optimum reg ulator theories. This part of the paper gives simulation results for a power system consisting of two regulating areas.