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Overvoltage absorbing device

A technology for absorbing devices and overvoltages, which is applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., and can solve problems such as phase-to-phase short circuit and cumulative insulation damage in electrical equipment , to achieve the effect of good energy gathering, suppression of atmospheric overvoltage, and reduction of residual voltage

Inactive Publication Date: 2015-08-19
SOLVE AIR HEFEI
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are the following kinds of overvoltages in the 3-35KV power system: operating overvoltages of equipment such as circuit breakers, metal and arc grounding overvoltages generated when single-phase metals are grounded, and atmospheric overvoltages generated during lightning strikes. The maximum value of the voltage may reach more than 3.5 times the phase voltage. If such a high overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the insulation in the electrical equipment. wear, it will cause a major accident of phase-to-phase short circuit

Method used

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  • Overvoltage absorbing device

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Embodiment Construction

[0008] see figure 1 , a kind of overvoltage absorbing device, it comprises non-linear resistance FR1, FR2, high-voltage fuse RD, electric capacity C, resistance R, one end of described non-linear resistance FR2 is used as port, and the other end is respectively connected with one end of resistance R, one end of electric capacity C, One end of the non-linear resistor FR1 is connected, the other end of the resistor R, the other end of the capacitor C, and the other end of the non-linear resistor FR1 are respectively connected to one end of the high-voltage fuse RD, and the other end of the high-voltage fuse RD is used as the other port.

[0009] Resistor R and capacitor C form a high-frequency channel to transmit the high-frequency peak voltage generated in the system to the non-linear resistor FR2, and the non-linear resistor FR2 acts to absorb the peak overvoltage and limit the high-frequency peak voltage not to exceed a certain range, thus ensuring In order not to generate ex...

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Abstract

The invention provides an overvoltage absorbing device, and relates to the technical field of overvoltage suppression of an electric power system. The device is characterized by comprising nonlinear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C, and a resistor R. One end of the nonlinear resistor FR2 is used as a port, and the other end is connected with one end of the resistor R, one end of the capacitor C, and one end of the nonlinear resistor FR1. The other end of the resistor R, the other end of the capacitor C, and the other end of the nonlinear resistor FR1 are respectively connected with one end of the high-voltage fuse RD. The other end of the high-voltage fuse RD is used as a port. The device has good energy gathering and energy absorbing effects, and can effectively suppress atmosphere overvoltage, switching overvoltage, and relatively large amplitude arc grounding overvoltage, and ferromagnetic resonance overvoltage.

Description

technical field [0001] The invention relates to the technical field of power system overvoltage suppression, in particular to an overvoltage absorbing device. Background technique [0002] At present, there are the following kinds of overvoltages in the 3-35KV power system: operating overvoltages of equipment such as circuit breakers, metal and arc grounding overvoltages generated when single-phase metals are grounded, and atmospheric overvoltages generated during lightning strikes. The maximum value of the voltage may reach more than 3.5 times the phase voltage. If such a high overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the insulation in the electrical equipment. If it is worn out, it will cause a major accident of phase-to-phase short circuit. Contents of the invention [0003] The purpose of the present invention is to provide an overvoltage absorbing device with good voltage limiting effect, low residual voltage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 不公告发明人
Owner SOLVE AIR HEFEI
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