FIELD: accident-preventing automation for eliminating asynchronous operation in power systems.
SUBSTANCE: in case of reduction in frequency of revolution from rated value to preset one rate of frequency deviation (slip) within first cycles of asynchronous operation is measured and if this rate is in excess of preset value and sign of its acceleration reverses to positive value, signal is sent for stopping asynchronous operation.
EFFECT: provision for eliminating asynchronous operation.
1 cl, 2 dwg
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