FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, namely to automation of electrical networks. Method of conserving the resource of power transformers of a double-transformer substation consists in monitoring the value of electrical parameters and measuring the time of their passage. Power value and time are measured through first and second power transformers of double-transformer substation, as well as temperature of first and second transformers. If the power flowing through one of the transformers exceeds the rated one, the level of this excess (overload) is determined. Readout of permissible operating time of transformer with specified level of overload is started, temperature of this transformer is controlled. If at the moment of counting the transformer overload has not disappeared or if the transformer temperature exceeds the allowable value even before the reading time end, a signal is sent to switch part of consumers connected to buses of this transformer, on buses of another transformer of double-transformer substation, provided that at that time loading of the second transformer, taking into account the load switched to it, does not exceed allowable taking into account allowable overload, so, that through the transformer, on which overload was observed, the power not exceeding the rated power flowed for a time sufficient for its cooling to the specified temperature level. If it is impossible to switch part of consumers to buses of another transformer due to its load exceeding permissible taking into account allowable overload, then signal is issued for disconnection of part of load of overloaded transformer for time, shorter time of permissible interruption of power supply of said consumers. After said time, consumers switched off are switched on again.
EFFECT: technical result consists in maintaining resource of power transformers of double-transformer substation and preventing unreasonable interruptions in electric power supply of consumers.
1 cl, 1 dwg
