Arc suppression and overvoltage suppression system

Abstract

The invention discloses an arc suppression and overvoltage suppression system, comprising an isolation switch module. The input end of the isolation switch module is connected to a power grid, and theoutput end of the isolation switch module is connected to a voltage mutual inductance module. The voltage mutual inductance module is connected with a grid voltage detection module. The grid voltagemodule is respectively connected to a rectifier voltage regulator module and a control module. The rectifier module is connected to an arc detection module and the control module, and the control module is respectively connected with a switch control module, a vacuum contact module and an alarm module. According to the arc suppression and overvoltage suppression system, the power-down can be realized by controlling the switch control module to disconnect through the control module, thereby protecting the power system from being burned out by high voltage electricity; and an action command is sent The controller to the one-way action vacuum disconnection module by the controller to convert the unstable arc grounding into the stable metal grounding, which greatly shortens the duration of theone-way grounding arc and the resulting insulation breakdown short circuit accident and arrester explosion accident.

Description

technical field [0001] The invention belongs to the technical field of electric power protection, and in particular relates to an arc suppression and overvoltage suppression system. Background technique [0002] In the neutral point indirect grounding system, the basis for forming arc grounding overvoltage is intermittent arcing. When a one-way intermittent arcing grounding fault occurs in the neutral point indirect grounding system, the arc is continuously extinguished and reignited for many times, causing the system The charge on the ground capacitance accumulates and redistributes repeatedly, causing high-frequency oscillation overvoltage on the inductance-capacitance loop of the non-fault phase, and the high-amplitude overvoltage aggravates the cumulative damage of fixed insulation such as cables , At the same time, the arc grounding overvoltage will also cause the fuse to blow, and even cause the arrester to explode in severe cases. [0003] In the traditional technolo...

AI Technical Summary

Problems solved by technology

[0002] In the neutral point indirect grounding system, the basis for forming arc grounding overvoltage is intermittent arcing. When a one-way intermittent arcing grounding fault occurs in the neutral point indirect grounding system, the arc is continuously extinguished and reignited for many times, causing the system The charge on the ground capacitance accumulates and redistributes repeatedly, causing high-frequency oscillation overvoltage on the inductance-capacitance loop of the non-fault phase, and the high-amplitude overvoltage aggravates the cumulative damage of fixed insulation such as cables At the same time, the arc grounding overvoltage will also cause the fuse to blow, and even cause the arrester to explode in severe cases

[0003] In the traditional technology, by changing the grounding method of the neutral point of the system, grounding with a small resistance, and sacrificing the reliability of the power supply to eliminate the arc grounding, but due to the lack of reliability, it gradually develops through the principle of the arc suppression coil, using the different voltage characteristics of the inductance and capacitance. , the inductor current is used to compensate the capacitive current, but the arc suppression coil cannot compensate the high-frequency current, so connecting the coil will cause endo side effects. With the rapid development of urban and rural power grids, the reliability requirements of the grid are getting higher and higher. The harm that voltage brings to the safe operation of equipment and power grid, the present invention provides the following technical solutions

Images