Industrial power-saving equipment employing supercapacitor

Abstract

The invention discloses industrial power-saving equipment employing a supercapacitor. The industrial power-saving equipment comprises a transformer T, a control switch, a first LC filter, a supercapacitor assembly Cn, a second LC filter and a bypass protection switch device, wherein the supercapacitor assembly Cn comprises an AC / DC rectifier, a DC / DC converter, a DC / AC inverter, a supercapacitor and an internal control unit, the control switch comprises multiple groups of switches Sn and an auxiliary switch Sfn, the auxiliary switch Sfn is connected with the AC / DC rectifier, the main switch Snand the supercapacitor assembly Cn form a discharging circuit of the supercapacitor, and the auxiliary switch Sfn and the supercapacitor assembly Cn form a charging circuit. The supercapacitor is initially introduced to the field of industrial power saving, a voltage of the load end is adjusted by the charge / discharge circuit of the supercapacitor, an effect of controlling total active current ofthe main circuit during the voltage regulation process is achieved, so that a power factor is increased.

Description

Technical field [0001] The invention relates to the technical field of industrial energy-saving devices, in particular to an industrial energy-saving device using super capacitors. Background technique [0002] The existing industrial power savers are all based on the principle of reactive power compensation. The basic principle of reactive power compensation is to connect devices with capacitive power load and inductive power load in parallel in the line. When the capacitive load releases energy, the inductive load Absorb energy; while the inductive load releases energy, the capacitive load is absorbing energy. The energy is exchanged between the two loads. In this way, part of the power absorbed by the inductive load can be compensated by the output power of the capacitive load, which is power The compensation principle. [0003] Therefore, the most commonly used industrial power savers are generally equivalent to capacitors, but ordinary capacitors have poor voltage characteris...

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Problems solved by technology

[0003] Therefore, the most commonly used industrial power savers are generally equivalent to capacitors, but ordinary capacitors have poor voltage characteristics, poor voltage resistance, slow short-circuit response, and even have side effects of amplifying high-order harmonic circuits in the power grid, so contactors need to be installed and other protective measures

[0004] Generally speaking, the existing reactive power compensation method is mainly to increase reactive power, and the problem of voltage fluctuation generated when the power is started or shut down has not been solved, so the existing industrial power saver has a certain power saving effect , but its power-saving effect is limited to improving the reactive power factor and reducing line loss. The protection of user terminal equipment is not enough, and it cannot achieve better energy-saving effect, which needs to be improved urgently.

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