A circuit fault protection system

Abstract

The invention discloses a circuit fault protection system which comprises at least two paths of three-phase lines in parallel, wherein first electric signal acquisition units are arranged at neutral points of the three-phase lines; second electric signal acquisition units are arranged on parallel lines at the input ends of the two paths of the three-phase lines; third electric signal acquisition units are arranged on parallel lines at output ends of the two paths of the three-phase lines; conductive inserts are respectively arranged at two ends of a conductive connecting arm; and the conductive inserts are in selective conductive contact with electric connecting ends at two ends of a fault source. By adopting the circuit fault protection system, the technical problem that circuit failure is caused by line faults is solved.

Description

technical field [0001] The invention relates to a circuit intelligent protection system, more specifically, the invention relates to a circuit fault protection system. Background technique [0002] Single-phase grounding is a single-phase grounding of 10kV (35kV) small current grounding system. Single-phase grounding fault is the most common fault in power distribution system, which mostly occurs in humid and rainy weather. It is caused by many factors such as tree barriers, single-phase breakdown of insulators on distribution lines, single-phase disconnection, and small animal hazards. Single-phase grounding not only affects the normal power supply of users, but also may generate overvoltage, burn out equipment, and even cause phase-to-phase short circuit to expand accidents. [0003] In actual operation, the plastic cloth of the brick factory fell onto the wires due to strong winds, causing the voltage transformers of the substation to burn out, causing equipment damage a...

AI Technical Summary

Problems solved by technology

Single-phase grounding not only affects the normal power supply of users, but also may generate overvoltage, burn out equipment, and even cause phase-to-phase short circuit to expand accidents

[0003] In actual operation, the plastic cloth of the brick factory fell onto the wires due to strong winds, causing the voltage transformers of the substation to burn out, causing equipment damage and large-scale power outages

After a single-phase ground fault occurs, resonant overvoltage may also occur, which may be several times higher than the normal voltage, endangering the insulation of the substation equipment, and in severe cases, the insulation breakdown of the substation equipment may cause a greater accident

[0004] After a single-phase grounding fault occurs, intermittent arcing grounding may occur, resulting in resonant overvoltage and overvoltage several times higher than the normal voltage. The overvoltage will further cause insulation breakdown of the insulator on the line, resulting in a serious short circuit accident. Burn down part of the distribution transformer, cause the lightning arrester and fuse insulation on the line to break down and burn out, and electrical fires may also occur

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