FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, in particular to systems for automatic prevention of instability and automatic systems for limiting frequency reduction in isolated power systems.
EFFECT: technical result consists in improvement of accuracy of selection of control actions at disconnection of power units of power plants in isolated power system and is achieved by the fact that invention contains a control element of previous mode, unit for comparing current loads of generators (power units) by active power, unit for implementing control actions, actuating and launching elements, is supplemented with a unit for calculating optimum control actions, which performs calculation of control actions in accordance with the proposed algorithm.
1 cl, 2 dwg
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