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A nine-level inverter and a nine-level active filter

A nine-level inverter technology, applied in the field of nine-level inverters and nine-level active filters, can solve the problems of many switching devices, high system volume cost, and large loss, and achieve low voltage stress , Large system capacity, reduced volume and cost

Active Publication Date: 2022-05-03
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing multi-level topology has the disadvantages of many switching devices, large losses, and high system volume and cost.

Method used

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  • A nine-level inverter and a nine-level active filter
  • A nine-level inverter and a nine-level active filter
  • A nine-level inverter and a nine-level active filter

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Embodiment Construction

[0046] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0047] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and number of componen...

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Abstract

The invention discloses a nine-level inverter and a nine-level active filter, belonging to the field of power quality control. The present invention solves the problems of many switching devices, large loss and high system volume cost in the existing multi-level topology. The first capacitor included in the present invention is connected in parallel to both ends of the first bridge arm, the second capacitor is connected in parallel to both ends of the second bridge arm, and the two ends of the first bridge arm pass through the first bidirectional auxiliary switch and the second bidirectional auxiliary switch respectively. Connecting the two ends of the second bridge arm to form a closed loop, the two ends of the seventh switch tube are respectively connected to the positive terminal of the first capacitor and the negative terminal of the second capacitor, and the two ends of the eighth switch tube are respectively connected to the positive terminal and the negative terminal of the first capacitor. The invention has the advantages of low switching loss, small voltage stress, low electromagnetic interference, large system capacity and the like.

Description

technical field [0001] The invention relates to the field of power quality control, in particular to a nine-level inverter and a nine-level active filter. Background technique [0002] The rapid development of power conversion technology has led to a large number of applications of power electronic devices. On the one hand, it facilitates the conversion and application of electric energy, on the other hand, it also causes serious power quality problems. Nonlinear electrical equipment is more and more used in industry and commerce. These nonlinear loads will generate a large amount of harmonic current, which will affect itself and other equipment in the grid, and cause voltage on the transmission line Distortion seriously affects the power quality. The active power filter has the advantages of good filtering characteristics, small size, and flexible application. It can be used to dynamically suppress harmonics and compensate reactive power. It is an important device to impr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02M7/49H02J3/01H02J3/18H02M1/12H02M7/5387
CPCH02M7/483H02M7/49H02J3/01H02J3/1821H02J3/1857H02M1/12H02M7/53873Y02E40/40Y02E40/30
Inventor 高晗璎刘向南任明杰封帅李志影
Owner HARBIN UNIV OF SCI & TECH