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Novel overvoltage absorber

An overvoltage and absorber technology, applied in the field of new overvoltage absorbers, can solve the problems of accumulated insulation damage and interphase short circuit in electrical equipment, and achieve the effects of suppressing atmospheric overvoltage, improving energy accumulation, and eliminating protection dead zones.

Inactive Publication Date: 2015-08-19
SOLVE AIR HEFEI
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  • Claims
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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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  • Novel overvoltage absorber

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Embodiment Construction

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

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Abstract

The invention provides a novel overvoltage absorbing device, and relates to the technical field of overvoltage suppression of an electric power system. The absorber 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 absorber 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 a novel 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 new type of overvoltage absorber 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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