Bidirectional inverter with dual operating modes

A technology of bidirectional inverter and dual working mode, which is applied in the direction of converting irreversible DC power input into AC power output, can solve the problems that grid-connected mode output and independent mode output cannot be realized, and reduce high costs and reduce The effect of device usage and cost reduction

Inactive Publication Date: 2013-03-13
BEIJING POWER MACHINERY INST
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  • Abstract
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Problems solved by technology

[0013] The invention discloses a dual-mode inverter, which is applied in the field of distributed power generation and is used to solve the problem that the same inverter device in the existing device cannot realize grid-connected mode output and independent mode output

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  • Bidirectional inverter with dual operating modes
  • Bidirectional inverter with dual operating modes
  • Bidirectional inverter with dual operating modes

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Embodiment Construction

[0031] In the present invention, by rationally using the grid-connected reactor in the grid-connected inverter and the LC filter in the independent mode inverter, it is proposed to share the IGBT and the power reactor in the two modes, and the damping circuit and the preset charging circuit. The hardware structure of this design effectively reduces the number of devices.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0033] The inverter of the present invention is composed of 6 parts, including a DC filter capacitor 1, a power module 2, an AC reactor 3, an AC filter capacitor 4, a damping resistor 5, and a pre-charging circuit 6. Figure 4 A load 7, a grid breaker 8 and a three-phase AC grid 9 are also shown in .

[0034] The DC bus is connected to the power module 2 through the DC filter capacitor 1, the power module 2 is connected to the AC bus, the AC reactor 3, the AC filter capacitor 4, the da...

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Abstract

The invention discloses a bidirectional inverter with dual operating modes, which is applied to the field of distributed power generation and is used for solving the problem that the same inverter cannot implement synchronization mode output and independent mode output in the prior art. According to the bidirectional inverter comprises the schemes that, a zero line bridge arm module is additionally arranged in a synchronization mode inverter; a design of sharing an alternating current reactor and a filter is adopted, and a pre-charging unit is additionally arranged; and dual-mode control is applied to software. After the bidirectional inverter is used, hardware topology of the same inverter can implement a control strategy that operations in both a synchronization mode and an independent mode can be realized. The high cost consumed by two sets of independent hardware adopted in the traditional inverter is greatly reduced, and the requirement of distributed power generation is met.

Description

technical field [0001] The invention relates to an inverter, in particular to a bidirectional inverter with dual working modes. Background technique [0002] In recent years, distributed power generation, as a new type of power generation, has attracted more and more attention. The significance of distributed power generation has been fully reflected in environmental protection, energy conservation, and diversification of energy utilization. Distributed power generation can make full use of clean energy, such as micro gas turbines, solar energy, wind energy, tidal energy, geothermal energy, biological waste energy, etc. At the same time, it can also solve the power supply problem in remote areas, becoming a good supplement to the existing power supply, and has great development potential. [0003] At present, the inverters used in distributed power generation mainly have two operation modes: one is grid-connected operation mode, and the other is independent operation mode....

Claims

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Application Information

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IPC IPC(8): H02M7/48
Inventor 李一凡谢清明王天亮张花赵燕王紫燕
Owner BEIJING POWER MACHINERY INST
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