Rectifying method and rectifying device of power supply rectifying circuit

Abstract

The invention discloses a rectifying method and a rectifying device of a power supply rectifying circuit. Acquired three-phase voltage and acquired three-phase current are processed, thereby obtaininga first phase DC current component and a second phase DC current component. According to the first phase DC current component, the output end voltage of the power supply rectifying circuit and the output end current of the power supply rectifying circuit, reference current is obtained. Through changing the second phase DC current component to reactive current, the reactive current does not participate in output-side voltage adjustment, namely the reactive current is zero and furthermore reactive power in a power grid is eliminated. Through decomposing reference voltage and synthesizing one zero current vector and two related non-zero current vectors, influence of different reference current and single-mode voltage which are formed by different switch device combinations is prevented, andharmonic pollution in the power grid is eliminated so that voltage at the output end satisfies a requirement for a series of multiple-specification, multiple-kind high-quality high-performance high-frequency high voltage in different working conditions.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a rectification method and device for a power rectification circuit. Background technique [0002] The advancement of power semiconductor switching device technology has promoted the rapid development of power electronic converter technology, and various converter devices based on pulse width modulation control have emerged, such as frequency converters, inverter power supplies, high-frequency switching power supplies and various Class special converters, etc. Power electronic devices have been widely used in various fields of national economy. However, the extensive use of power electronic devices has also brought some problems that cannot be ignored. For example, a large number of current converters need rectification links to obtain DC voltage. The traditional diode rectification and phase-controlled rectification links not only have poor quality of DC side voltage High, and...

AI Technical Summary

Problems solved by technology

However, the extensive use of power electronic devices has also brought some problems that cannot be ignored. For example, a large number of current converters need rectification links to obtain DC voltage. The traditional diode rectification and phase-controlled rectification links not only have poor quality of DC side voltage High, and will inject a lot of harmonics and reactive power to the grid, causing serious grid "pollution"

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