FIELD: electrical engineering.
SUBSTANCE: invention relates to the field of electrical engineering. An optical current transformer is used to detect the three-phase current of the high voltage side of the starting/backup transformer. The occurrence of a fault is determined by the following criteria: when the current of a certain phase falls below a given threshold value or when the current of a certain phase on the high voltage side of the starting/backup transformer does not meet the condition of symmetry. In this case, after exposure, an alarm is given, and the operator is informed of the need for timely troubleshooting.
EFFECT: increase in the sensitivity and accuracy of identification in the idle mode of a malfunction in the form of a phase break of the starting/backup transformer system, which increases the reliability of the starting/backup transformer system at the power plant.
6 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DIFFERENTIAL PROTECTION METHOD FOR CURRENT CONVERTER AND RELAY PROTECTION DEVICE | 2014 |
|
RU2649324C2 |
| UNIFIED POWER FLOW CONTROLLER FOR DOUBLE-CIRCUIT LINE | 2015 |
|
RU2664558C2 |
| SEQUENTIAL VALVE CONTROL DEVICE FOR TRANSMITTING HIGH VOLTAGE DIRECT CURRENT | 2016 |
|
RU2680819C2 |
| WAY OF COORDINATED MANAGEMENT OF MULTI-TERMINAL SYSTEM OF HIGH-VOLTAGE DIRECT CURRENT POWER TRANSMISSION USING VOLTAGE CONVERTERS | 2013 |
|
RU2628333C1 |
| METHOD OF DIFFERENTIAL PROTECTION WHEN CONVERTING FREQUENCY FOR OUTPUT TRANSFORMER SYSTEM WITH STATIC FREQUENCY CONVERTER | 2013 |
|
RU2598903C1 |
| METHOD AND DEVICE FOR FAST ELIMINATION OF FERROMAGNETIC RESONANCE OF VOLTAGE TRANSFORMER | 2019 |
|
RU2743460C1 |
| SWITCHING CONTROL METHOD AND SWITCHING CONTROL DEVICE | 2015 |
|
RU2660189C1 |
| LONGITUDINAL COMPENSATOR AND CONTROL METHOD | 2018 |
|
RU2740012C1 |
| METHOD OF THE TRANSFORMER PHASE FAILURE CONDITION DETECTING | 2014 |
|
RU2660128C2 |
| UNIDIRECTIONAL DEVICE AND DC VOLTAGE CONVERSION AND CONTROL SYSTEM | 2019 |
|
RU2756978C1 |
