Power saving device with harmonic suppression and voltage stabilization functions

Abstract

The invention discloses a power saving device with harmonic suppression and voltage stabilization functions. The power saving device is connected between a three-phase power supply grid and a three-phase load in series, and the three-phase power supply grid and the three-phase load are connected through three phase lines and a neutral line. The power saving device comprises voltage stabilizers, a harmonic suppressor and a harmonic suppressor bypass switch, wherein the voltage stabilizers are connected in the three phase lines in series, and the harmonic suppressor and the harmonic suppressor bypass switch are connected on the neutral line in series and are mutually connected in parallel, the voltage stabilizers comprise three same voltage stabilizing modules respectively connected on the three phase lines in series, each voltage stabilizing module comprises a tuning capacitor, a protective circuit breaker, a modulation inductor and two thyristors; and the harmonic suppressor comprises harmonic-resistance capacitors, a harmonic-resistance inductor and an overvoltage protection switch, the harmonic-resistance capacitors are connected on the neutral line in series and are respectively connected with the harmonic-resistance inductor and the overvoltage protection switch in parallel. The power saving device with the harmonic suppression and voltage stabilization functions, disclosed by the invention, can be used for stably regulating the voltage of a load and suppressing the harmonic wave of the load so as to realize the purpose of saving power , and can run during three-phase equilibrium or three-phase disequilibrium.

Description

technical field [0001] The invention relates to a power-saving device used in a three-phase power system, in particular to a power-saving device with harmonic suppression and voltage stabilization functions. Background technique [0002] At present, step-down power-saving technology and harmonic suppression technology are two effective power-saving methods. In order to ensure the normal power consumption of users in the case of voltage fluctuations, the three-phase power system often makes the grid voltage slightly higher than the rated voltage. Buck energy-saving technology can reduce the excess supply of grid voltage. With the development of power technology, the nonlinear load in the three-phase power system is gradually increasing, and the problem of harmonics is becoming more and more serious. Harmonics not only affect the normal operation of power equipment, accelerate the aging of equipment, but also generate a large amount of distorted power. Wave suppression techno...

AI Technical Summary

Problems solved by technology

However, since power electronic equipment is a non-linear load, the use of electronic energy-saving equipment may introduce harmonics, resulting in harmonic pollution and distortion power loss, which becomes another form of waste of electric energy, not real energy saving

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