Terminal compensation control method for intermediate frequency power supply system

Abstract

The invention relates to a terminal compensation control method for an intermediate frequency power supply system. A phase-locked loop is adopted for tracking a terminal input voltage phase position of the intermediate frequency power supply system, the phase position is subjected to phase shift operation and feedforward compensation operation based on an output current and a wire cable phase shift coefficient, and a terminal output voltage reference phase position is obtained; based on the terminal output voltage reference phase position, terminal output voltage can be dynamically compensated in a real time manner via staggering of switching frequencies and adjustment of alternating current quantity proportional resonance under a stationary coordinate system. Terminal compensation control in the terminal compensation control method for the intermediate frequency power supply system is dual compensation for an output voltage amplitude and phase position; line inductive reactance between terminal output and a load is taken into consideration, feedforward compensation of a reference voltage phase position is added, a problem of voltage fluctuation caused via load switching operation is solved, compensation voltage is subjected to under alternating current quantity proportional resonance adjustment under the stationary coordinate system, terminal dynamic compensation capability is improved, and a problem of an instantaneous voltage decline can be solved.

Description

Technical field [0001] The invention relates to the technical field of inverter compensation control, in particular to a terminal compensation control method for an intermediate frequency power supply system. Background technique [0002] With the development of the IF centralized power supply system, the issue of the output power quality of the IF power supply system has received increasing attention. figure 1 In the centralized power supply mode shown, the different loads in the system are all concentrated in an intermediate frequency grid, and their working conditions may be coupled to each other, and different loads will also have a certain mutual influence, and the main power quality will follow Questions are as follows: [0003] (1) Line voltage drop [0004] Because the intermediate frequency power supply system has the characteristics of high frequency, low voltage and large current, and the long transmission line, the line voltage drop of the intermediate frequency power su...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a terminal compensation control method for an intermediate frequency power supply system, which can simultaneously solve the problem of steady-state line voltage drop in the intermediate frequency power supply system, voltage fluctuations caused by load switching, instantaneous voltage drops, phase compensation, etc. Quality problems, to ensure the reliable and stable operation of each load in the system

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