High-energy-capacity overvoltage absorber

Abstract

The invention provides a high-energy-capacity overvoltage absorber which relates to the technical field of electric power system overvoltage inhibition. The high-energy-capacity overvoltage absorber comprises non-linear resistors FR1 and FR2, a high-voltage fuse RD, a capacitor C and a resistor R. One end of the non-linear resistor FR2 serves as a port, and the other end is connected with one endof the resistor R, one end of the capacitor C and 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 resistors FR1 are respectively connected with one end of the high-voltage fuse RD. The other end of the high-voltage fuse RD serves as another port. The high-energy-capacity overvoltage absorber is good in voltage limiting effect, low in residual voltage value and good in energy gathering and energy absorbing.

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 voltages in the 3-35KW power system: operating overvoltage of circuit breakers and other equipment, metal and arc grounding overvoltage generated when single-phase metal is grounded, and atmospheric overvoltage generated by lightning strikes, etc. Some peak overvoltages Its maximum value may reach more than 3.5 times the phase voltage. If such an overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the insulation in the electrical equipment. 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 residual voltage value, and good ene...

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Problems solved by technology

[0002] At present, there are the following voltages in the 3-35KW power system: operating overvoltage of equipment such as circuit breakers, metal and arc grounding overvoltage generated when single-phase metal is grounded And lightning strikes are atmospheric overvoltages, etc. Some peak overvoltages may reach a maximum of 3.5 times the phase voltage. If such an overvoltage acts on the power grid for several hours, it will inevitably cause cumulative damage to the internal insulation of electrical equipment. If the insulation is broken down to the ground in the weak link of the insulation of all phases, it will cause a major accident of short circuit between phases

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