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A single-phase five-level inverter and a control method thereof

A five-level, inverter technology, applied in the direction of single-grid parallel feeding arrangement, electrical components, conversion of AC power input to DC power output, etc., can solve the problems of increasing equipment weight and equipment cost, and achieve a simple structure. , Small output common mode interference noise, the effect of eliminating common mode noise

Pending Publication Date: 2018-12-21
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, in order to suppress common mode noise, it is necessary to add an isolation transformer to the inverter circuit, which not only increases the weight of the equipment, but also increases the cost of the equipment

Method used

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  • A single-phase five-level inverter and a control method thereof
  • A single-phase five-level inverter and a control method thereof
  • A single-phase five-level inverter and a control method thereof

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Embodiment Construction

[0033] Embodiments of the present invention provide a single-phase five-level inverter and a control method thereof, which have lower requirements on the DC side voltage amplitude and can output less common-mode interference noise without an isolation transformer.

[0034] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of 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 belong to the protection scope of the present invention.

[0035] see figure 1 , the present invention provides an embodiment of a ...

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Abstract

The invention provides a single-phase five-level inverter and a control method thereof. The inverter comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a first capacitor, a second capacitor and a diode. The inverter provided by the invention has the advantages of simple structure, lower DC side voltage amplitude requirement, and small output common-mode interference noise without isolation transformer. If the inverter is connected to the grid for grid-connected operation, the negative terminal of the DC side is connected to the neutral point of the grid so as to eliminate common-mode noise, and the voltage on the AC output side can be up to four times the voltage on the DC side.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a single-phase five-level inverter and a control method thereof. Background technique [0002] Single-phase inverters are mostly used for single-phase AC load power supply, and can also be used in new energy or energy storage grid-connected systems. Usually, in order to suppress the common mode noise, it is necessary to add an isolation transformer link in the circuit of the inverter, which not only increases the weight of the equipment, but also increases the cost of the equipment. Contents of the invention [0003] Embodiments of the present invention provide a single-phase five-level inverter and a control method thereof, which have lower requirements on the DC side voltage amplitude, and can output less common-mode interference noise without an isolation transformer. [0004] According to one aspect of the present invention, a single-phase five-level inverter is ...

Claims

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Application Information

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IPC IPC(8): H02M7/483H02M1/12H02J3/38
CPCH02J3/38H02M1/12H02M7/483H02M1/123
Inventor 马明徐柏榆雷二涛王玲
Owner GUANGDONG POWER GRID CO LTD
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