Reactive compensation equipment with LED (light emitting diode) constant-current driver

Abstract

The invention provides reactive compensation equipment with an LED (light emitting diode) constant-current driver. The reactive-load compensation equipment with the LED constant-current driver comprises a three-phase power frequency alternating-current power supply, reactive compensation capacitors, a three-phase rectifier bridge, an LCL (lower control limit) filter and an LED lamp bank which are sequentially connected to one another; each phase of the three-phase power frequency alternating-current power supply is connected with one end of the corresponding reactive compensation capacitor through a corresponding switch; the other ends of the reactive compensation capacitors are connected to midpoints, which correspond to a bridge arm, of three-phase inputting sides of the three-phase rectifier bridge; two switches are arranged on one side, which is close to the rectifier bridge, of each reactive compensation capacitor; and when the two switches of each reactive compensation capacitor are switched on simultaneously, the three reactive compensation capacitors are connected to one another in a star-shaped manner. By the reactive compensation equipment, reactive compensation can be realized, the latter LED driver does not need an electrolytic capacitor, the service life is long, a complex controller is not required, and the reactive compensation equipment with the LED constant-current driver is maintained and repaired conveniently in the later period, has important using value for places needing reactive compensation, is suitable for workshops at which a large number of inductive loads are used, and is also suitable for places needing reactive compensation and illumination such as a power distribution room with a transformer.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a reactive power compensation device with LED constant current drive. Background technique [0002] In recent years, energy conservation has always been a hot topic. Since the "Eleventh Five-Year Plan", relevant government departments have always attached great importance to energy conservation and emission reduction. In energy saving and emission reduction, a very important part is the energy saving of lighting electricity. Today, countries around the world are gradually banning the sale and use of incandescent lamps. Obviously, incandescent lamps can no longer meet the needs of the times. LED lights have high brightness, high efficiency, long life, and small size. Under such an era background, they can replace other lighting equipment to achieve the purpose of energy saving and emission reduction. LED is the abbreviation of Light Emitting Diode. The Chinese name is ...

AI Technical Summary

Problems solved by technology

The life of electrolytic capacitors is generally within 10,000 hours and is seriously affected by temperature, which is not suitable for the life of LEDs of more than 50,000 hours.

Of course, there are also driving solutions without electrolytic capacitors, but the topological structure of the power part, the hardware and software of the driving control part of these solutions are relatively complicated, which is not good for later maintenance and repair, which is one of the reasons why LED lighting has not been popularized yet.

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