| 摘要 |
FIELD: electricity.SUBSTANCE: invention relates to automation of electric networks and is designed for control of successful automatic reclosing (AR) of the main switch (MS) of a line. From the moment of appearance of the SC current surge, the first counting of time is started, which is equal to the delay time of actuation of the MS protection; with that, the moment of its disappearance is controlled; parameters of an emergency mode are determined by sending sounding pulses to all the wires of the line to determine all reflection points and to calculate distances to these points, and the obtained emergency parameters are compared to the normal parameters obtained in a similar way at operation of the line in the normal mode, and if at the moment of completion of the first time count the SC current does not disappear, and the parameters of the emergency mode differ from the parameters of the normal mode, then, a conclusion is made on MS deactivation and a signal is sent to prohibit its AR, from the moment of the SC current deactivation the second time counting is started, which is equal to the MS AR delay time, and the sounding pulses are constantly sent to all the wires of the line at a certain interval, the parameters of the line are determined after deactivation of the SC current and compared to the parameters of the normal mode, and if at any moment of time before completion of the second time count the parameters of the line, which are determined after the SC current deactivation, become equal to the parameters of the normal mode, a conclusion is made on SC self-elimination, determination of the parameters of the line is stopped, a prohibition signal at MS AR is picked up, and if at the moment of completion of the delay time of MS AR an operating current surge appears in the line, then, a conclusion is made on successful MS AR of the line.EFFECT: enlargement of functional capabilities of the method by receiving the information on successful MS AR of the line.2 dwg |
