Fault control circuit

Abstract

The invention discloses a fault control circuit, which comprises a manipulation unit, a control unit and a communication unit, wherein the manipulation unit comprises a local module, a remote module and an adjusting module, one end of the local module is connected with the adjusting module and first signals are transmitted, and the other end of the local module and the remote module transmit second signals to the control unit; the control unit is connected with the manipulation unit for receiving the second signals, recognizing and processing the second signals and converting the second signals to third signals; and the communication unit can receive the third signals and feeding fourth signals back to the control unit according to the third signals. Inter-phase short circuit fault and grounding fault of a small current grounding system of a distribution network are simulated, a physical dynamic mode can be adopted to more intuitively and effectively study the fault characteristics ofthe small current grounding system, a grounding mode can be adjusted flexibly, and through local switch operation or remote protocol remote control, an ungrounded system can be conveniently constructed.

Description

technical field [0001] The invention relates to the technical field of power detection equipment, in particular to a fault control circuit. Background technique [0002] In recent years, as users have higher and higher requirements for the reliability of distribution network power supply, fault indicators have been widely used in distribution network, and the research on small current ground fault identification and line selection technology has been pushed to a higher level. ; The zero-sequence current of a single-phase ground fault in a small-current grounding system is mainly the ground-to-ground capacitive current of the system, and the magnitude of this current is related to the system scale, and its value may be very small, so the characteristics of a single-phase ground fault in a small-current grounding system are not obvious , and the fault features are complex. Although there are many digital simulation tools at present, there are still certain differences from th...

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Problems solved by technology

[0002] In recent years, as users have higher and higher requirements for the reliability of distribution network power supply, fault indicators have been widely used in distribution network, and the research on small current ground fault identification and line selection technology has been pushed to a higher level. ; The zero-sequence current of a single-phase ground fault in a small-current grounding system is mainly the ground-to-ground capacitive current of the system, and the magnitude of this current is related to the system scale, and its value may be very small, so the characteristics of a single-phase ground fault in a small-current grounding system are not obvious , and the fault features are complex

Although there are many digital simulation tools at present, there are still certain differences with the real small current grounding scene, which cannot meet the needs of use, are unreliable, and are not easy to promote and use.

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