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System and method for generating a high frequency switching signal for a power converter

A signal and generator technology, applied in the direction of output power conversion device, conversion of irreversible DC power input into AC power output, conversion of DC power input into DC power output, etc.

Pending Publication Date: 2021-03-19
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the PWM generator can only provide low frequency switching signals to the line side converter, which in turn limits the line side converter to generate high voltages equal to the voltage provided by the stator

Method used

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  • System and method for generating a high frequency switching signal for a power converter
  • System and method for generating a high frequency switching signal for a power converter
  • System and method for generating a high frequency switching signal for a power converter

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Embodiment Construction

[0014] As will be described in detail below, various embodiments of systems and methods for generating high frequency switching signals are provided. The system disclosed herein includes a control device capable of operating a power converter of a power generation system, such as a line-side converter, at a higher switching frequency to generate a high voltage at the output of the power converter. This operation enables direct coupling of the power link of the power converter to the stator side power link, thus eliminating the need for a three-winding converter in the power generation system. By eliminating the need for a three-winding converter, the size and cost of the power generation system can be significantly reduced. Such power generation systems can be easily installed in locations with space constraints.

[0015] Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to whi...

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Abstract

A control device (110) includes a first multiplexing unit (202) configured to segregate a first PWM signal having a first switching frequency into a second PWM signal having a second switching frequency and a third PWM signal having a third switching frequency. Also, the control device (110) includes an integrator unit (204) configured to generate a first integrated signal and a second integratedsignal based on the second PWM signal and the third PWM signal, and a modulator unit (206) configured to receive the first integrated signal and the second integrated signal and generate a modulationsignal based on the first integrated signal and the second integrated signal. Furthermore, the control device (110) includes a generator unit (208) configured to receive the modulation signal and generate a fourth PWM signal having a fourth switching frequency different from the first switching frequency based on the modulation signal.

Description

technical field [0001] One or more embodiments of the present specification relate to power converters, and more particularly to systems and methods for generating high frequency switching signals for power converters. Background technique [0002] Typically, a power generation system includes a power generator, a power conversion unit coupled to the generator, and a three-winding converter coupled to the power conversion unit and a stator of the generator. The power conversion unit includes a rotor-side converter and a line-side converter connected back-to-back via a direct current (DC) link. The main function of the power conversion unit is to regulate the active and reactive power received from the rotor of the generator. Furthermore, a three-winding converter is used to combine the power received from the power conversion unit with the power received from the stator and provide the combined power to the grid. [0003] Generally, three-winding converters are bulky and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M7/49H02M3/337H02M1/08H02P9/00H02J3/38F03D9/25H03K7/08
CPCH02M7/49H02P9/007H03K7/08F03D7/0272H02M7/5395H02M5/225H02J3/381H02J2300/28Y02E10/76Y02E10/72F03D9/25F05B2220/706H02M1/088H02M5/4585
Inventor K·贾O·雷
Owner GENERAL ELECTRIC CO