A circuit ground fault removal system

Abstract

The invention discloses a circuit grounding fault removal system. The system comprises at least two three-phase lines arranged in parallel, a plurality of fault acquisition units, a plurality of faultdetection devices and at least one fault isolation devices, wherein a neutral point of each three-phase line is provided with a first electrical signal acquisition unit, an input end parallel line ofthe two three-phase lines is provided with a second electrical signal acquisition unit, an output line parallel line of the two three-phase lines is provided with a third electrical signal acquisition unit; each fault isolation device is provided with a conductive connecting arm, the two ends of each conductive connecting arm is respectively provided with a conductive connection-peg, and the conductive connection-pegs are selectively in conductive contact with the electric connection ends of the two ends of a fault source. The circuit grounding fault removal system improves the reliability ofthe circuit operation.

Description

technical field [0001] The invention relates to a circuit intelligent control system, more specifically, the invention relates to a circuit grounding fault removal 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 dama...

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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