Capacitor dynamic voltage-sharing control method of modular multi-level matrix converter
A modular multi-level, dynamic voltage equalization technology, applied in the direction of converting AC power input to AC power output, electrical components, output power conversion devices, etc., can solve the problem of module capacitor voltage fluctuations, capacitor voltage fluctuations, and influence on commutation To solve problems such as the normal operation of the device, to achieve the effect of improving the control effect and reducing the loss
Pending Publication Date: 2022-03-01
XI AN JIAOTONG UNIV +1
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, the power transfer between the M3C input side and the output side will cause the capacitor voltage fluctuation on the M3C sub-module. When the input power is not equal to the output power, it will also cause voltage DC paranoia, especially when the frequency of the M3C side is close to 0. , or when the frequencies on both sides are close, the module capacitor voltage will fluctuate greatly, affecting the normal operation of the converter
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only The embodiments are a part of the present invention, not all embodiments, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts disclosed in the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0035] The schematic diagrams of the structures according to the disclosed embodiments of th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a capacitance dynamic voltage-sharing control method for a modular multilevel matrix converter, and the method comprises the following steps: 1), obtaining a modulation ratio offset value dMxyn (x belongs to {u, v, w}, y belongs to {a, b, c}) of PWM modulation; 2) obtaining a modulation ratio offset final value dMxy (x belongs to {u, v, w}, y belongs to {a, b, c}) of PWM modulation between the sub-converters; and 3) obtaining a modulation wave signal and a triangular carrier signal of the modular multi-level matrix converter, obtaining a final modulation wave signal according to the modulation wave signal, dMxyn (x belongs to {u, v, w}, y belongs to {a, b, c}) and dMxy (x belongs to {u, v, w} and y belongs to {a, b, c}), subtracting the final modulation wave signal from the triangular carrier signal, obtaining a PWM signal of an actual switch of each full-bridge module in a bridge arm according to the subtracting result, and outputting the PWM signal. According to the PWM signal of the actual switch of each full-bridge module in the bridge arm, module capacitance dynamic voltage-sharing control of the modular multi-level matrix converter is carried out. The method can carry out capacitance dynamic voltage-sharing control on the modular multi-level matrix converter.
Description
technical field [0001] The invention belongs to the field of control strategies for high-voltage and high-power power conversion devices, and relates to a dynamic capacitor voltage equalization control method for a modularized multilevel matrix converter. Background technique [0002] Modular multilevel matrix converter (modular multilevel matrix converter, M3C) is a new type of AC / AC converter, which can realize bidirectional flow of energy, and has high power quality, high reliability and high controllability A series of technical advantages, such as easy scalability, are generally considered to be more suitable for AC-AC converter topology in low-frequency power transmission systems. [0003] However, the power transfer between the M3C input side and the output side will cause the capacitor voltage fluctuation on the M3C sub-module. When the input power is not equal to the output power, it will also cause voltage DC paranoia, especially when the frequency of the M3C side ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/293H02M1/088
CPCH02M5/293H02M1/088
Inventor 孟永庆厉璇胡雅涵马春喆闫书豪苑宾张和高子健尹聪琦
Owner XI AN JIAOTONG UNIV