Solar cell outputting high voltage

Abstract

The invention discloses a solar cell outputting high voltage. The solar cell comprises a light acquisition and conversion module and a voltage boosting module. The voltage boosting module is composed of a voltage boosting circuit reducing voltage switching stress. The voltage boosting circuit reducing voltage switching stress comprises voltage Vin inputted by the light acquisition and conversion module, switching elements S1 and S2, diodes D1 and D2, an inductor L, an input capacitor C1, an intermediate capacitor C2 and an output capacitor C0. An input power supply generates input voltage Vin. The switching elements S1 and S2 are respectively provided with a parasitic capacitor CS1 and a parasitic capacitor CS2. Output voltage of the solar cell is enhanced by controlling on and off of the switching elements S1 and S2, and energy loss is also reduced.

Description

【Technical field】 [0001] The invention relates to a solar cell with high output voltage, in particular to a solar cell with reduced voltage switch stress and high output voltage. 【Background technique】 [0002] In the solar power generation system, since a single solar cell provides low-voltage direct current, it cannot meet the electricity demand of existing electrical equipment, nor can it meet the requirements of grid connection. Therefore, it is necessary to convert low-voltage direct current into practical required high voltage direct current. Therefore, a boost converter with high gain and stable performance has become a research hotspot, which is of great significance to promote the development of the photovoltaic cell industry. [0003] The most basic boost converter is a single-transistor Boost converter. However, the boost range of this converter is very limited, it is difficult to meet the conversion requirements of high gain, and the voltage stress of the switch...

AI Technical Summary

Problems solved by technology

At this time, the conversion process of electric energy is actually changed from the original DC-DC to DC-AC-AC-DC, and the energy conversion efficiency of the whole system is reduced.

[0006] The second is to use coupled inductors, but the structure of coupled inductors is complex, which is not conducive to industrial processing, it is difficult to ensure the consistency of the circuit, and it will cause excessive voltage stress of switching devices, which will bring electromagnetic interference and other effects, resulting in large operating losses of the converter.

[0007] The third is to add cascaded boost units, the more units, the greater the voltage gain, but the more circuit components, the more complex the structure

However, this boost circuit requires too many components such as switches, capacitors, and diodes, resulting in a complex circuit structure and high cost.

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