Photovoltaic inversion unit and triphase photovoltaic inversion device
A photovoltaic inverter and capacitor unit technology, applied in photovoltaic power generation, conversion of irreversible DC power input to AC power output, cooling/ventilation/heating transformation, etc. Unbalanced current, large volume of photovoltaic inverter units, etc., to achieve the effect of good effect, uniform heat dissipation, and small size
Inactive Publication Date: 2013-02-06
AISWEI NEW ENERGY TECHNOLOGY (YANGZHONG) CO LTD
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Problems solved by technology
At present, three-phase full-bridge integrated design is mostly used in medium and large-scale photovoltaic inverters, that is, all power devices, capacitors, radiators, stacked busbars, etc. are integrated into one overall unit, which will result in large volume and low chassis utilization; Uneven heat dissipation; unbalanced AC / DC side current; large stray inductance on the laminated bus; certain requirements on the working conditions of the equipment, and at the same time the overall unit is heavy and bulky, which is not conducive to improving production efficiency, installation and maintenance
[0003]The traditional photovoltaic inverter unit is large and heavy, with uneven heat dissipation, unbalanced AC / DC / DC side current and large stray inductance on the laminated bus
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[0024] as attached figure 1 and 2 As shown, a photovoltaic inverter unit includes a capacitor unit and a heat dissipation unit.
[0025] as attached figure 2 As shown, the main structure of the capacitor unit is composed of an upper fixed box 1 . A plurality of DC capacitors 2 and laminated busbars are arranged inside the upper fixed box 1 . Multiple DC capacitors 2 are placed vertically. The lower part of the lower fixed box 8 is provided with laminated busbars. as attached Figure 4 As shown, the laminated bus bar is electrically connected to multiple DC capacitors 2 in a horizontal shape. There are three layers of stacked bus bars, the first layer stacked from top to bottom is the positive bus bar 3 , the second layer is the second insulating plate 4 , and the third layer is the negative bus bar 5 .
[0026] The main structure of the heat dissipation unit is composed of a lower fixing box 8 . The lower fixing box 8 can be detachably connected with the upper fixing ...
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The invention discloses a photovoltaic inversion unit, which comprises a capacitor unit and a heat radiator unit, wherein the capacitor unit comprises an upper fixing box, a plurality of DC capacitors arranged inside the upper fixing box and laminated busbars connected with the plurality of DC capacitors; the heat radiator unit comprises a lower fixing box detachably connected with the upper fixing box, heat radiating fins arranged inside the lower fixing box, a plurality of split and parallel switching devices, a driving plate connected with the plurality of split switching devices, an AC outlet bar connected with the driving plate and a first insulating plate arranged between the switching devices and the heat radiating fins; and the switching devices correspond to the DC capacitors. The invention further discloses a triphase photovoltaic inversion device, which comprises three photovoltaic inversion units, wherein each photovoltaic inversion unit is connected with one of three-phase current.
Description
technical field [0001] The invention relates to a photovoltaic inverter unit. Background technique [0002] With the development of social economy and the continuous exploitation of energy, the pollution to the global environment is gradually deepening, and the existing resources are also decreasing. Therefore, human beings began to develop green new energy. A large number of research experiments have proved that solar energy is an inexhaustible green new energy source, and it is not subject to geographical restrictions, and its energy conversion efficiency is very high. Therefore, it is favored by people, especially the use of solar energy to generate electricity. However, the output of the photovoltaic array is DC, and in practical applications, it is mostly AC, so a chopping inverter technology (SPWM) is needed to realize DC to AC. At present, the three-phase full-bridge integrated design is mostly used in medium and large-scale photovoltaic inverters, that is, all pow...
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IPC IPC(8): H02M7/44H05K7/20
CPCY02E10/56
Inventor 夏俊臣
Owner AISWEI NEW ENERGY TECHNOLOGY (YANGZHONG) CO LTD