An active intervention type arc suppression device test system functional system

Abstract

The invention discloses an active intervention type arc suppression device test system function system. The medium voltage distribution network system simulation function module can realize the medium voltage distribution network system characteristic simulation; the single-phase ground fault simulation function module can be used in the medium voltage distribution network. The system simulates the line or bus of the function module to set the distribution network fault occurrence area to reproduce the single-phase ground fault; the performance index monitoring function module monitors the performance index; the result display function module is used to display the test process and results. By reproducing the actual operating conditions of the distribution network, the invention truly reflects the development process of various types of single-phase grounding faults in the medium-voltage distribution network, provides platform support for solving problems such as identification and processing of single-phase grounding faults, and improves the distribution network. The equivalence and repeatability of the test environment can improve the test ability of the distribution network fault detection device and the reliability of the test results, and it has strong practicability in the field of substation automation test technology.

Description

technical field [0001] The invention belongs to the technical field of automatic test systems for substations, and in particular relates to a functional system of an active intervention type arc suppression device test system. Background technique [0002] At present, the 10kV distribution network in my country generally adopts the form of small current grounding that is not grounded or grounded by the arc suppression coil. It has become a problem that has plagued the scene for many years. For a long time, for the treatment of single-phase grounding faults in the distribution network, the original manual wire-pulling method was mostly used on site for wire selection, which has low efficiency, poor power supply reliability and economy. At the same time, considering that my country's distribution network has the characteristics of complex line structure, diverse and changeable environment, frequent and complex faults, and heavy maintenance workload, if a fault occurs in a cert...

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Problems solved by technology

[0005] The active intervention type arc suppression device can effectively suppress the arc overvoltage and reduce the current at the fault point. It has been applied in the field, but the starting sensitivity is too low when there is a high-impedance grounding, and the surge current of the voltage transformer after the arc is closed is likely to cause resonance overvoltage. ; When the faulty phase grounding switch is turned on, it will cause low-frequency oscillation of the neutral point voltage and generate low-frequency inrush current flowing through the electromagnetic voltage transformer, which will damage the voltage transformer or fuse, and easily generate overvoltage after arc extinction; When the load is connected to metallic ground or low-resistance ground, the ground current at the fault point after the action of the active intervention device is still large, which is not conducive to the reliable extinguishing of the arc.

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