RELAY OF DIFFERENCE IN PHASES OF GENERATORS CONNECTED FOR PARALLEL OPERATION Russian patent published in 2012 - IPC H02J3/40 

FIELD: electricity.

SUBSTANCE: invention may be used in phase synchronisation of generators connected for parallel operation, since their connection to a common load in case of a phase shift is available with equal frequencies and amplitudes creates active compensating currents, which in the end results in violation of quality of generator functioning. According to the invention, a relay of phase difference in generators connected for parallel operation comprises a subtractor, three comparators, a gate multivibrator, a delay element, a differentiator, an integrator, a multiplier, a divider and two actuating elements.

EFFECT: higher accuracy of synchronisation by phase of generators connected for parallel operation due to variation of a sequence of input signals conversion, which makes it possible to increase accuracy of detection of mismatch in phases of generators connected for parallel operation and as a result to increase accuracy of synchronisation of these parameters of a board grid voltage twice.

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