Photovoltaic grid-connected controller applied to power electronic transformer

Abstract

The invention discloses a photovoltaic grid-connected controller applied to a power electronic transformer, which comprises a box body, a box cover, an inductance module, a radiator, an IGBT (Insulated Gate Bipolar Translator) component, a power board assembly, an acquisition board assembly, an acquisition board bracket, an output lightning protection board, a direct current relay and a hanging assembly, and the inductance module and the upper side of the box body are sealed through a sealing gasket. The box body and the box cover are sealed and protected through foaming strips. A rectangular square hole is formed in the bottom side of the box body, the radiator is arranged on the outer side of the box body, the substrate surface is tightly attached to the bottom side of the box body, and the IGBT component is installed on the radiator through the rectangular square hole; the radiator and the bottom side of the box body are sealed through a rubber square pad. According to the invention, a self-cooling mode is adopted, the influence of wind and dust on components is avoided, the IP66 high protection level is realized, and the advantages of high power density, good heat dissipation effect, high protection level and convenience in installation and maintenance are realized.

Description

Technical field [0001] The present invention belongs to the field of power electronics, and more particularly to a photovoltaic grid controller applied to a power electron transformer. [0002] technical background [0003] High-power power electron transformers have intelligent controllable features relative to traditional transformers, energy conversion and utilization modes that are integrated with "light recharge" can be implemented. The photovoltaic grid controller can detect the power generation voltage of the photovoltaic board in real time, and track the maximum voltage current value, so that the system is output with power energy; applied to the solar photovoltaic system, coordinating the work of solar panels and loads, is a photovoltaic system brain. In order to track the maximum power point during the photovoltaic grid, the power of the photovoltaic grid controller is particularly important. [0004] The reliable and stable operation of the equipment mainly includes two...

AI Technical Summary

Problems solved by technology

In the existing technical solutions, air cooling is an effective thermal management method. However, this method will reduce the protection performance of the equipment, and the possible dust and moisture will affect the stability and reliability of components. In addition, Air cooling also brings noise impact

The self-cooling method has a large radiator volume, so it needs to be placed outside the box body, which further increases the difficulty of equipment protection. Due to the complexity of equipment components, no high protection level of IP66 has been found in the existing similar public schemes The overall plan of the equipment

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