Active power filter for power grid

Abstract

The invention relates to the technical field of filters, and discloses an active power filter for a power grid. The active power filter comprises a filter main body, a magnetic ring is arranged on theouter side of the filter main body, a knob is movably mounted on the outer side of the filter main body, and a rotating screw rod is movably connected to the inner side of the knob. And a rotating shaft center is movably installed on the inner side of the rotating screw rod, the outer side of the rotating shaft center is movably connected with one end of a shaft rod, the other end of the shaft rod is movably connected with a moving plate, and the outer side of the moving plate is movably connected with a debugging spring. According to the active power filter for the power grid, an electromagnetic coil and two groups of resistance type fuses are arranged in the filter main body, the resistance type fuses not only can play a role of resistance in a circuit and replace the resistance, but also have the function of a traditional fuse, and when the current in the filter main body is too large, automatic fusing can be performed, so that a protection effect is achieved.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to an active power filter for a power grid. Background technique [0002] The power filter is a filter circuit composed of capacitors, inductors and resistors. The filter can effectively filter the frequency point of a specific frequency in the power line or frequencies other than this frequency point to obtain a power signal of a specific frequency or eliminate a power signal of a specific frequency. Its main function is to let the useful signal as much as possible It is possible to pass without attenuation and reflect as much as possible to unwanted signals. Nowadays, filters are used very frequently. It can effectively reduce or eliminate the influence of harmonics on the power system and maintain the operation of the entire power system. However, the existing Once the filter is burned out, the entire circuit board will be burned out, and the entire circuit board can only be rep...

AI Technical Summary

Problems solved by technology

The filter can effectively filter the frequency point of a specific frequency in the power line or frequencies other than this frequency point to obtain a power signal of a specific frequency or eliminate a power signal of a specific frequency. Its main function is to let the useful signal as much as possible It is possible to pass without attenuation and reflect as much as possible to unwanted signals. Nowadays, filters are used very frequently. It can effectively reduce or eliminate the influence of harmonics on the power system and maintain the operation of the entire power system. However, the existing Once the filter is burned out, the entire circuit board will be burned out, and the entire circuit board can only be replaced, resulting in waste of resources and increased production costs

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