Instantaneous harmonic estimation and compensation type single-phase inverter power supply and control method of single-phase inverter power supply

Abstract

The invention relates to an instantaneous harmonic estimation and compensation type single-phase inverter power supply and a control method of the single-phase inverter power supply. The single-phase inverter power supply comprises a full-bridge inverter circuit, a filter circuit, an output voltage sampling circuit, an output current sampling circuit, a sinusoidal pulse width modulation (SPWM) driving signal level converting circuit, an insulated gate bipolar translator (IGBT) driving circuit, a display circuit, a press key circuit, a digital signal processor (DSP), a field programmable gate array (FPGA) and a power supply circuit. The direct current inversion, the sampling of output voltage and output current and the SPWM control signal driving can be stably and accurately realized, meanwhile, the matched use of the DSP and the FPGA is adopted, and a control algorithm can be efficiently and fast realized. The method provided by the invention adopts the base wave control based on a D-Q module for ensuring that the output waveform peak value and the phase position stable precision have good dynamic response; the feed-forward compensation and the feedback compensation are adopted, so that the external noise interference and the total harmonic distortion rate in the output voltage can be effectively reduced, and the waveform of the output voltage is perfectly controlled.

Description

technical field [0001] The invention belongs to the technical field of power electronic power conversion, and in particular relates to an instantaneous harmonic estimation and compensation type single-phase inverter power supply and a control method thereof. Background technique [0002] Modern inverter technology has been widely used in various power conversion systems and devices in industrial and civil fields. Among them, single-phase inverter power supply is widely used in office automation, medicine, communication and national defense. With the development and application of inverter technology, higher requirements are put forward for single-phase inverter power supply. In many occasions, the output voltage waveform of the inverter is required to accurately track a given signal and have a fast dynamic response. [0003] For these problems, there are many control schemes, such as digital PID control, multi-loop feedback plus feedforward control, deadbeat control, repetit...

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Problems solved by technology

[0004] Aiming at the distortion problem of the load voltage waveform caused by the harmonic current on the filter inductor when the inverter power supply has a nonlinear load (such as a rectifier), the present invention provides an instantaneous harmonic estimation and compensation type single-phase inverter device and its Control method to effectively reduce the harmonics of the single-phase inverter output voltage

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