Harmonic wave reactive compensation control method based on high-voltage inverter bypass

Abstract

The invention discloses a harmonic wave reactive compensation control method based on a high-voltage inverter bypass. A high-voltage inverter failure bypass reactive compensation circuit comprises an inverter, wherein the inverter is connected with a power grid through an wire inlet switch; a wire outlet end of the inverter is connected to a motor through a three-phase reactor and a wire outlet switch sequentially; a wire inlet end of a bypass switch is connected with a wire inlet end of an inverter wire inlet switch; and a wire outlet end of the bypass switch is connected with a wire outlet end of an inverter wire outlet switch. By the harmonic wave reactive compensation control method based on the high-voltage inverter bypass, a high-voltage inverter device can perform reactive compensation in real time according to motor load after the high-voltage inverter automatically switches the failure into the power frequency to operate, the network side power factor is increased, and the quality of electric energy is improved, so that the utilization ratio of the inverter is increased to the maximum degree and the benefit maximization of users is guaranteed.

Description

technical field [0001] The invention relates to the field of high-voltage frequency converter fault bypass control, and more specifically, relates to a harmonic reactive power compensation control method based on high-voltage frequency converter bypass. Background technique [0002] With the wide application of energy-saving technologies for high-voltage frequency converters in power, metallurgy, petroleum, chemical and other important occasions, higher requirements are put forward for the stability and energy-saving effect of high-voltage frequency converters. The cascaded high-voltage inverter, which consists of several independent power units connected in series, has been favored by more and more industries at home and abroad for its advantages such as small harmonics, convenient and fast unit interchange, mass production, and convenient maintenance. It shows a broad promotion prospect. [0003] Each phase of the unit-cascaded high-voltage inverter is composed of several...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing power frequency bypass method cannot save energy for users, and to provide a cascaded high-voltage inverter fault bypass method based on reactive power compensation, which can ensure the fault bypass of the inverter Then it is connected in parallel with the load motor to compensate the reactive power for the load, thereby increasing the power factor of the grid side from about 0.7 to about 0.99, and adjusting it in real time according to the load change, so as to ensure the continuity and safety of the user's production. Maximize energy saving benefits

Images