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High-capacity overvoltage absorber

A technology of absorbers and high-voltage fuses, which is applied in the direction of emergency protection circuit devices, electrical components, and circuit devices used to limit overcurrent/overvoltage, and can solve problems such as short circuits between phases and cumulative insulation damage in electrical equipment. Achieve the effects of good energy gathering, suppression of atmospheric overvoltage, and reduction of residual voltage

Inactive Publication Date: 2015-08-05
SOLVE AIR HEFEI
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  • Claims
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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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  • High-capacity overvoltage absorber

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Embodiment Construction

[0008] see figure 1 , a high-capacity overvoltage absorber, which includes nonlinear resistors FR1, FR2, high-voltage fuse RD, capacitor C, and resistor R. One end of the nonlinear resistor FR2 is used as a port, and the other end is connected to one end of the resistor R and the capacitor C respectively. One end is connected to one end of the non-linear resistor FR1, 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 excessive voltage ...

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Abstract

A high-capacity overvoltage absorber relates to the technical field of overvoltage suppression of an electrical power system. The high-capacity overvoltage absorber is characterized in that the high-capacity overvoltage absorber comprises nonlinear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R. One end of the nonlinear resistor FR2 serves 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 resistors FR1 are connected with one end of the high-voltage fuse RD; and the other end of the high-voltage fuse RD serves as another port. The overvoltage absorber has very good energy-gathering and absorbing functions and can effectively suppress atmosphere overvoltage, switching overvoltage, 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 a high-capacity overvoltage absorber. 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 a high-capacity overvoltage absorber with good voltage limiting effect, low residua...

Claims

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Application Information

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IPC IPC(8): H02H9/04
Inventor 不公告发明人
Owner SOLVE AIR HEFEI
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