Safe and reliable active power filtering device for smart power grid

Abstract

A safe and reliable intelligent power grid active power filtering device disclosed by the present invention comprises a protection box, a supporting mechanism is jointly and fixedly connected between the front part and the rear part of the lower end of the protection box, and fixing mechanisms are jointly and fixedly connected among the four corners of the lower box wall of the protection box. A filtering device body is clamped in the fixing mechanism, ventilation openings are formed in the upper portion of the left box wall and the lower portion of the left box wall of the protection box and the upper portion of the right box wall and the lower portion of the right box wall of the protection box, and dustproof nets are jointly and fixedly connected between the front opening walls and the rear opening walls of the four ventilation openings; baffles are fixedly connected to the upper portion and the lower portion of the left end and the upper portion and the lower portion of the right end of the protection box, and supporting rods are fixedly connected to the four corners of the upper end of the protection box. According to the safe and reliable active power filtering device for the smart power grid, the whole active power filtering device is high in stability, convenient to move, good in heat dissipation effect on the filtering device and suitable for wide application.

Description

Technical field [0001] The present invention relates to the field of smart grid technology, in particular to a safe and reliable smart grid active power filtering device. Background [0002] Active power filter is a kind of dynamic suppression of harmonics, compensation of reactive power of the new power electronic device, it can be different sizes and frequencies of harmonics for fast tracking compensation, the reason is called active, is relative to the passive LC filter, can only passively absorb fixed frequency and size of harmonics, APF can be by sampling the load current and the separation of each harmonic and reactive power, control and active output current size, frequency and phase, and quick response, offset the corresponding current in the load, Dynamic tracking compensation is realized, and it can both make up for harmonics and reactive power and imbalance; the use of controllable power semiconductors to inject currents opposite to the harmonic source current amplitud...

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Problems solved by technology

[0003] The inventors have found that at least the following problems have not been solved in the prior art: 1. The stability of the existing filtering device is poor, and the stability of the device is easily affected by accidental collisions, thereby causing damage to the device and affecting the normal use of the device , and the device is fixed, it is inconvenient to move the device; 2. When the existing filter device is in use, the installation and disassembly of the device are relatively complicated, resulting in troublesome maintenance and replacement of the device, which reduces the practicability of the device, and The heat dissipation effect of the device is not good, and dust is easy to enter, which affects the service life of the device; therefore, we propose a safe and reliable smart grid active power filter device

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