An arc suppression and overvoltage protection device

Abstract

The invention discloses an arc suppression and overvoltage protection device, which comprises a connection line and a detection line. The connection line is provided with a voltage transformer and a high-voltage current limiting capacitor connected in series with the connection line, and a extinguisher connected in parallel with the connection line. The arc discharge protection device is equipped with a signal receiver and a 2X capacitor inside, and the 2X capacitor is connected in series with a plurality of voltage divider resistors, and a series switch is provided on the connection line corresponding to each voltage divider resistor . The present invention uses a plurality of detection boxes on the detection line to detect the connection line, and the detection line is not directly connected to the connection line, but only connects the structure on the line through wireless communication, and the detection line is directly powered by the solar power generation system, so no matter on the connection line Any overvoltage and resonance phenomenon will not affect the detection circuit, the detection is stable and fast, and the fast maintenance of the connecting line is guaranteed.

Description

technical field [0001] The invention relates to the technical field of arc suppression and overvoltage protection, in particular to an arc suppression and overvoltage protection device. Background technique [0002] At present, most of the power distribution systems below 35kV in my country adopt the neutral point indirect grounding system. When a single-phase grounding fault occurs in the neutral point indirect grounding system, the fault current is capacitive current, and if it exceeds a certain limit, it will be ignited on the ground Unstable arc, accompanied by electromagnetic oscillation in the transient process, can easily cause single-phase intermittent arc grounding overvoltage. Although the amplitude is not large, if it exists for a long time, it will cause harm to equipment with weak insulation strength, and then cause phase-to-phase short circuit and other more serious hazards. In addition, overvoltage phenomena caused by resonance overvoltage, operating overvoltage...

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Problems solved by technology

[0002] At present, most of the power distribution systems below 35kV in my country adopt the neutral point indirect grounding system. When a single-phase grounding fault occurs in the neutral point indirect grounding system, the fault current is capacitive current, and if it exceeds a certain limit, it will be ignited on the ground Unstable arc, accompanied by electromagnetic oscillation in the transient process, can easily cause single-phase intermittent arc grounding overvoltage. Although the amplitude is not large, if it exists for a long time, it will cause harm to equipment with weak insulation strength, and then cause phase-to-phase short circuit and other more serious hazards. In addition, overvoltage phenomena caused by resonance overvoltage, operating overvoltage and other reasons are also common in non-neutral point grounding systems. Once overvoltage occurs, electrical equipment will often be damaged or a large area will be damaged. The power outage accident is very harmful

[0003] In the existing technology, some arc suppression and voltage protection devices are based on sensors such as circuit detection or controllers to perform rapid overvoltage protection, but there are no signal detection processing completed by these sensors or controllers connected to the connection line. , it was damaged by the overvoltage in the line, resulting in no guarantee for overvoltage protection, and after long-term detection, the service life of these sensors and controllers will gradually decrease, which greatly increases the difficulty of repair and maintenance

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