Power distribution network experiment network monitoring system

Abstract

The invention discloses a power distribution network experiment network monitoring system. The system includes an operation unit, a control unit and a communication unit, wherein the operation unit includes a local module, a remote module and an adjusting module, one end of the local module is connected with the adjusting module and further sends a first signal, the other end of the local module and the remote module sends a second signal to the control unit, the control unit is connected with the operation unit and is used for receiving the second signal and identifying, processing and converting the second signal to form a third signal, the communication unit can receive the third signal and further feeds back a fourth signal to the control unit according to the third signal. The systemis advantaged in that phase-to-phase short-circuit faults and grounding faults of a distribution network small current grounding system are simulated, a physical dynamic model is utilized to more visually and effectively study fault characteristics of the small current grounding system, a grounding mode can be flexibly adjusted, and non-grounded systems can be easily constructed with local switchoperation or remote protocol remote control.

Description

technical field [0001] The technical field of electric power detection equipment that the present invention relates to, in particular, relates to a distribution network experiment network monitoring system. 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 simul...

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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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