Transformer secondary side detection control method and device

Abstract

The invention discloses a transformer secondary side detection control method and device. The device comprises a detection device, a voltage transformer and a current transformer, the voltage transformer and the current transformer are connected with the detection device, the voltage transformer is connected with a standby power supply through an electromagnetic switch, the electromagnetic switch is connected with the detection device, a transformation ratio device is arranged between the current transformer and the detection device and connected with the detection device, the transformation ratio device comprises coils with different transformation ratios and a bi-directional electromagnetic switch, and the bi-directional electromagnetic switch controls the coils with the different transformation ratios to connect and disconnect. According to the device, voltage and current of a transformer are detected, corresponding control devices are added, the voltage and the current are controlled, stability of the voltage and the current is ensured, and normal operation of metering, protecting and detecting functions is ensured.

Description

[0001] Technical field: [0002] The invention relates to the field of transformer detection and control, in particular to a transformer secondary side detection and control method and device. [0003] Background technique: [0004] The substation converts the large current into a small current of less than 5 amps through the current transformer, and the secondary small current of the substation is mainly used for metering, protection and monitoring. When the electricity load of the newly installed user is very small, and its operating current is far less than the allowable current of the accuracy of the electric energy metering device, the metering device of the substation sub-board will produce a large error, and it will also cause the failure of protection and monitoring, and the failure of protection It will cause safety hazards, and the lack of measurement will cause economic losses to the enterprise, and the irregular monitoring will affect the judgment and analysis of th...

AI Technical Summary

Problems solved by technology

When the primary and secondary transformers fail, the secondary voltage of the substation has been lost, resulting in the lack of protection, measurement and monitoring. The lack of protection will cause potential safety hazards, and the lack of measurement will cause economic losses for enterprises. The lack of it will affect the operator's judgment and analysis of the equipment's operating status, so the role of the secondary voltage is very important

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