METHOD FOR AUTOMATIC FREQUENCY UNLOADING OF THE POWER DISTRICT IN CONDITIONS OF DEVIATION OF POWER QUALITY INDICATORS Russian patent published in 2021 - IPC H02J3/24 H02J3/46 

FIELD: electricity.

SUBSTANCE: invention relates to the field of electricity. According to the method, when fixing the power quality control devices of the power district of unacceptable deviations of the power quality indicators, the sequential analysis blocks are put into operation. From the outputs of the operational information complex of the energy region, information about the current frequency values ​​and clock pulses is fed to the inputs of the sequential analysis units, and from the output of the storage unit for the results of modeling the operating modes of the energy region - information about the upper and lower set values. On the basis of clock pulses, control signals are generated for each of the processing channels of the sequential analysis units, and in each of the channels information processing is carried out in parallel with a shift by one information sample. In each of the blocks of sequential analysis at the outputs, the values ​​of the likelihood ratio corresponding to the current frequency, as well as the upper and lower set values ​​are formed. In case of deviations of the group products of the likelihood ratio beyond the upper and lower set values, control signals are generated, which, through the AND circuit, as well as the outputs of the processing channel of the sequential analysis block, are fed to the input of the operational information complex, where a set of commands for disconnecting the load is formed, which through the terminals of the emergency automatics are implemented by disconnecting electricity consumers connected to the nodes of the energy district.

EFFECT: reduction of the volume of the disconnected load in case of significant deviations of the power quality indicators from the standardized values.

1 cl, 5 dwg, 1 tbl