Integrated device of high-frequency PWM rectification and inversion as well as control method thereof

Abstract

The invention discloses an integrated device of high-frequency PWM rectification and inversion as well as a control method thereof, belonging to the technical field of power electronic technology. The integrated device comprises a main circuit unit, a drive and power amplifying unit, a PWM unit, a central control unit, an HMI unit, a voltage current mutual inductor, a power parameter measuring unit and a power unit, wherein the main circuit unit is connected with the voltage current mutual inductor and the drive and power amplifying unit; the drive and power amplifying unit is respectively connected with the power unit and the PWM; the PWM is respectively connected with the power unit and the central control unit; and the central control unit is respectively connected with the power parameter measuring unit and the HMI unit. In the starting process of a permanent magnet synchronous generator, steps direct current is converted into alternating current, and high-frequency alternating current generated by the permanent magnet synchronous generator in stable running is converted into direct current when the permanent magnet synchronous generator stably operates, thereby realizing energy double-flow.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a high-frequency PWM rectification and inverter integration device and a control method thereof. Background technique [0002] Micro gas turbine power generation system is a new type of distributed power generation system developed rapidly in recent years. Its output power range is generally between 20KW and 500KW. It has the advantages of cleanness, reliability, multi-purpose and realization of combined cooling, heating and power. In addition, it can also be used as a mobile high-performance power supply to provide high-performance, stable and reliable power energy for power consumption systems in various special environments and special conditions. When the system is working, the power turbine drives the rotor of the permanent magnet generator to rotate at high speed on the air bearing to generate high-frequency alternating current, which is controlled and...

AI Technical Summary

Problems solved by technology

[0007] (3) For the AC frequency conversion speed regulation system, due to the unidirectional conductivity of the diode, the regenerative energy of the motor braking cannot be fed back to the grid

Although this method is simple, it has the following disadvantages: energy is wasted and the system efficiency is low; the resistance heats up seriously, which affects the normal operation of other parts of the system; simple energy consumption braking cannot suppress the pumping voltage generated by rapid braking in time, which limits performance improvement

Images