Rotor one-point grounding protection device

Abstract

The invention discloses a rotor one-point grounding protection device, comprising a direct current exciting transformer, as well as a first loop and a second loop which are connected with the output end of the direct current exciting transformer; the input end of the direct current exciting transformer is connected with the output circuit of a power generator; the first loop comprises a grounding circuit and a measuring circuit; one end of the grounding circuit is connected with the output end of the direct current exciting transformer, and the other end of the grounding circuit is grounded; and one end of the measuring circuit is connected with the grounding circuit, and the other end of the measuring circuit is grounded. The measuring circuit comprises an overcurrent relay, an overlapping power supply and a direct-current isolating capacitor; one end of the overcurrent relay is connected with the first wiring end of a first rotor, and the other end of the overcurrent relay is connected with one end of the overlapping power supply; and the other end of the overlapping power supply is connected with one end of the direct-current isolating capacitor of which the other end is grounded. The rotor one-point grounding protection device has the advantages of effectively improving the operating level of safe production of the power generator, basically eliminating the loss caused by incorrect singals, convenience in transformation and low cost.

Description

technical field [0001] The invention relates to a grounding protection device, in particular to a one-point grounding protection device for a rotor. Background technique [0002] As a backup power source, generators are widely used in all walks of life in society. Generators generally include a peripheral stator and a rotor rotatable within the stator. The safe operation of the generator plays a decisive role in ensuring the normal operation and power quality of the power system. At the same time, the generator itself is also a very valuable electrical component. Therefore, it should be installed according to various faults and abnormal operating conditions. Perfect performance relay protection device. In the prior art, the one-point grounding protection device of the generator rotor is a common relay protection device. After the generator is connected to the machine-end self-shunt excitation device of the computer, frequent faulty signaling of the one-point grounding prot...

AI Technical Summary

Problems solved by technology

In the prior art, the generator rotor one-point grounding protection device is a common relay protection device. After the generator is connected to the machine-end self-shunt excitation device of the computer, frequent rotor one-point grounding protection error sending occurs, resulting in The one-point grounding protection device of the generator rotor fails and needs to be improved

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