High-power solar three-phase grid-connected inverter

A solar energy and inverter technology, applied in the field of solar power generation, can solve problems such as large energy consumption and large exhaust fans, and achieve the effects of reducing operating temperature, low noise and good heat dissipation effect

Inactive Publication Date: 2012-10-10
上方能源技术(杭州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The power cabinets disclosed in the above two patents are generally composed of a plurality of stacked power modules, and each power module realizes the three-phase conversion of A, B, and C, and includes several power modules for realizing the three-phase conversion. Power switching devices, a laminated busbar, a radiator and several capacitors. In this system, the ABC three-phase conversion will be output through the same laminated busbar, and the heat loss generated by the conversion will be passed through The same radiator emits heat. Therefore, the entire power module uses the same air duct and the same radiator to dissipate heat. Therefore, this air-cooled form generally has a longitudinal and long wind range, and a large-power exhaust fan is required, so that High energy consumption

Method used

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Embodiment

[0029] Example: a solar three-phase grid-connected inverter with a variable current power of 500kw, such as Figure 1-2 As shown, it includes a chassis 101 and an inverter module 5 located in the chassis 101; the inverter module 5 includes two power module groups that can realize three-phase inversion, and each power module group can realize an inverter power of 250kw; Each power module group includes three power modules that can each implement a phase inversion.

[0030]The negative input ends of the two power module groups are directly connected to the negative copper bars 12; the positive input ends of the two power module groups are respectively connected to the contactor-2, and the two contactors-2 are respectively connected to the positive copper bars 11; and The output end of each contactor-2 is also provided with a current sensor-41 for detecting the current at this end; the three phase outputs of each power module group are connected to the corresponding reactor 6, an...

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Abstract

The invention relates to the field of solar power generation, in particular to a high-power solar three-phase grid-connected inverter. The technical scheme for implementation of the inverter includes that the high-power solar three-phase grid-connected inverter comprises a case, an electrical cabinet, an operation transformer, an anode copper bar, a cathode copper bar, a first contactor, a first current sensor, an inversion module, an electric reactor, a three-phase capacitor, a second current sensor, a filter, a second contactor and a circuit breaker. The inversion module comprises at least one power module group, each power module group comprises three power modules, and each power module is used for realizing current conversion of one phase and provided with an independent laminated busbar. The high-power solar three-phase grid-connected inverter requires low power of a radiation fan and has better radiation effects.

Description

technical field [0001] The invention relates to the field of solar power generation, in particular to a high-power solar three-phase grid-connected inverter. Background technique [0002] The inverter equipment in the prior art, such as a 500kw solar three-phase grid-connected inverter, generally includes two 250kw power modules, and each power module includes a laminated busbar equipped with three phase power switching devices And the heat sink, the heat caused by the switching loss of the three phases is dissipated through the same heat sink and the same air-cooled air duct. The excessive concentration of heat and the formation of the air duct are too long, resulting in low heat dissipation efficiency and poor effect of each power module group. In order to enable the power switching device to work in a reasonable temperature range, the prior art often uses a high-power heat dissipation fan to compensate for the increase in operating temperature caused by low heat dissipati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/00H05K7/20
Inventor 赵军罗力叶宝春
Owner 上方能源技术(杭州)有限公司
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