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 intermediate frequency centralized power supply system, the attention paid to the output power quality of the intermediate frequency power supply system is increasing day by day. figure 1 In the centralized power supply mode shown, different loads in the system are all concentrated in an intermediate frequency power grid. There may be mutual coupling between their working conditions, and there will be certain mutual influence between different loads. The main power quality that follows Questions are as follows: [0003] (1) Line voltage drop [0004] Since the intermediate frequency power supply system has the characteristics of high frequency and low voltage and large current, and the transmission line is rela...

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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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