High-voltage and high-speed power generator voltage-dropping rectifying PFC system based on SWISS rectifier

Abstract

The invention discloses a high-voltage and high-speed power generator voltage-dropping rectifying PFC system based on an SWISS rectifier. The high-voltage and high-speed power generator voltage-dropping rectifying PFC system based on the SWISS rectifier comprises a high-voltage and high-speed power generator, an input filter, an SWISS rectifier and two controllers. The invention further disclosesa control method of the system. The SWISS rectifier is introduced to the engine side. Double-closed-loop controlling is performed on the rotating speed of the high-voltage and high-speed engine and the input power factor of the rectifier. Furthermore, double-closed-loop controlling is performed on the DC bus voltage and DC-side current of the rectifier. The rectifier can realize a voltage-reducingPFC function. The high-voltage and high-speed power generator voltage-dropping rectifying PFC system can settle a problem of severe stator current distortion of the high-voltage and high-speed powergenerator; and a PFC circuit is combined with a BUCK circuit, thereby improving system stability and efficiency.

Description

technical field [0001] The invention belongs to the field of generator rectification control, in particular to a SWISS rectifier-based high-voltage and high-speed power generation step-down rectification PFC system and a control method thereof. Background technique [0002] Energy is the source of power to promote economic development and social progress, and is an important material related to the national economy, the people's livelihood and social stability. With the rapid development of my country's modern industry, fossil energy sources such as oil, natural gas and coal are gradually exhausted, and environmental problems are becoming increasingly prominent. Energy and the environment have become major issues facing our country. [0003] Waste heat refers to the energy discharged after industrial utilization of coal, oil, and natural gas, which cannot continue to participate in other production processes. It is manifested in the form of high-temperature heat energy, a...

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Problems solved by technology

[0005] Traditional high-voltage high-speed generators use a three-phase six-switch PWM rectification topology. With the continuous increase in the rated speed of high-voltage high-speed generators, the output frequency of high-voltage high-speed generators has increased significantly, and may even reach thousands of Hertz. The rectification modulation brings difficulties, and the resulting harmonics of the stator current of the generator will not only increase the loss and temperature rise of the high-voltage high-speed generator, but also increase its torque ripple, threatening the safety of the system

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