Wide-input direct current inverter topology and feedforward average current control method thereof

Abstract

The invention belongs to the technical field of power electronic application, and especially relates to a wide-input direct current inverter topology and a feedforward average current control method thereof. The wide-input direct current inverter topology comprises a two-transistor Buck-Boost inverter and an interleaved two-transistor Buck-Boost inverter. The feedforward average current control method applicable to the wide-input direct current inverter topology is composed of an input voltage feedforward module, a mode switching module, a voltage outer ring and a current inner ring. According to the method, input voltage feedforward is introduced into the current inner ring in average current control, a feedforward function from the input voltage feedforward to the current inner ring is computed, simplification is carried out, thereby obtaining feedforward average current control applicable to practical application, and the input dynamic response performance of the inverters in a whole input voltage range is greatly improved; and moreover, by adoption of an interleaving technology, the conversion capacity is increased, the output current ripple is effectively reduced, and the support is provided for the field with wide range input and high power conversion.

Description

technical field [0001] The invention belongs to the technical field of power electronics application, and in particular relates to a wide-input DC converter topology and a feedforward average current control method thereof. Background technique [0002] With the continuous development of semiconductor technology, the power that semiconductor devices can withstand is increasing, and the DC converter composed of it plays an increasingly important role in the field of power supply. It has been widely used in solar power generation, tidal power generation, fuel cell and other new energy power generation fields, but the output voltage of these new energy power generation systems will fluctuate greatly due to changes in ambient temperature, climate and other conditions, often too low or too high, thereby exceeding the specified input voltage range. In order to protect the subsequent equipment from damage, the entire system cannot be made to work in the maximum power generation mo...

AI Technical Summary

Problems solved by technology

However, this kind of converter has a large range of input voltage changes, which will cause a large impact on the output voltage when the operating mode is switched, which will affect the normal operation of the subsequent equipment and the converter itself, and may cause conversion. The generator itself and the post-stage equipment are burned, which paralyzes the entire power generation system, and its achievable conversion power is relatively small.

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