A Multilevel Inverter Topology

A technology of multi-level inverter and topological structure, applied in the direction of electrical components, AC power input conversion to DC power output, output power conversion device, etc., can solve the problems of complex structure, poor stability, etc., and achieve simple connection circuit , low cost, and low harmonic distortion

Active Publication Date: 2021-02-12
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Complex structure and poor stability

Method used

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  • A Multilevel Inverter Topology
  • A Multilevel Inverter Topology
  • A Multilevel Inverter Topology

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Embodiment Construction

[0029] The present invention is described in further detail below in conjunction with accompanying drawing:

[0030] Such as figure 1 As shown, the present invention is a multi-level inverter topology, including the first switch T 1 , the second switch T 2 , the third switch T 3 , the fourth switch T 4 , the fifth switch T 5 , the sixth switch T 6 , the seventh switch T 7 , the eighth switch T 8 , the ninth switch T 9 , the tenth switch T 10 , the first capacitance C 1 , the second capacitance C 2 , the first DC power supply Vdc1 and the second DC power supply Vdc2;

[0031] The positive pole of the first DC power supply Vdc1, the seventh switch T 7 One end of the ninth switch T 9 One end and the tenth switch T 10 One end of the connection; the negative pole of the first DC power supply Vdc1, the sixth switch T 6 One end of the fourth switch T 4 one end and the eighth switch T 8 one end of the connection;

[0032] The fourth switch T 4 The other end of the s...

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Abstract

The invention discloses a multi-level inverter topology structure, which can generate thirteen-level output voltage waveforms by using two DC power supplies and ten unidirectional power switches, and can generate thirteen-level output voltage waveforms by using a small number of switches. Output waveform, and there is no interference between switches, the connection circuit is simple, there is no need to increase the output level and need to isolate the DC power supply and large-capacity capacitor bank, the harmonic distortion rate is low, and the inverter circuit does not have any auxiliary charging circuit The self-charging function is provided for the capacitor under the condition that the charge balance control topology can be realized. The present invention has a small number of control switches, a simple structure, and low cost; and the number of output level control switches is small, which can realize multiple level output control and high efficiency. Tall and easy to control.

Description

technical field [0001] The invention belongs to the field of power electronics research and specifically discloses a topology structure of a multilevel inverter. Background technique [0002] Renewable energy has become a topic of concern in recent years due to global warming and the decline of fossil fuels. These renewable energy systems require inverters, and multilevel inverters are favored due to their low cost, high efficiency, and good output waveform quality. These multilevel inverters can be used to inject energy conversion systems such as fuel cells, wind turbines, etc. into the grid. Since the output voltage of renewable energy systems is low, it needs to be fed into the grid. In a multilevel inverter, the output voltage is the same as the staircase waveform, and the total harmonic distortion is small. [0003] Generally speaking, the traditional topologies of multilevel inverters can be divided into diode clamped (DCMLI), flying capacitor (FCMLI) and cascaded H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483H02M7/5387
CPCH02M7/483H02M7/5387H02M1/007
Inventor 阿拉丁·穆斯塔法·穆罕默德·哈森李小腾戴立宇陈文洁杨旭周永兴
Owner XI AN JIAOTONG UNIV
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