Shenzhen Wudi Microelectronics Co., Ltd

Photovoltaic power generation is a technology that utilizes the photovoltaic effect of semiconductor interfaces to directly convert light energy into electrical energy. It mainly consists of three parts: solar panels (components), controllers, and inverters, and the main components are composed of electronic components. After being connected in series and packaged for protection, solar cells can form a large area of solar cell components, which, in combination with power controllers and other components, form a photovoltaic power generation device.

The structure and function of photovoltaic power generation system are composed of solar cell arrays, battery packs, charge and discharge controllers, inverters, AC distribution cabinets, solar tracking control systems, and other equipment. The functions of some of its equipment are:

1. When the battery array is illuminated (whether by sunlight or light generated by other luminescent materials), the battery absorbs light energy, and there is an accumulation of heterologous charges at both ends of the battery, generating a "photogenerated voltage", which is known as the "photogenerated volt effect". Under the action of the photovoltaic effect, the two ends of a solar cell generate electromotive force, converting light energy into electrical energy, which is an energy conversion device. Solar cells are generally silicon cells, divided into three types: monocrystalline silicon solar cells, polycrystalline silicon solar cells, and amorphous silicon solar cells.

2. The function of a battery pack is to store the electrical energy emitted by the solar cell array when illuminated and to provide power to the load at any time. The basic requirements for the battery pack used in solar cell power generation are: a. low self discharge rate; b. Long service life; c. Strong deep discharge capability; d. High charging efficiency; e. Less maintenance or no maintenance; f. Wide working temperature range; g. The price is low.

3. The controller is a device that can automatically prevent overcharging and discharging of batteries. As the number of cycles of charging and discharging and the depth of discharge are important factors determining the service life of a battery, a charging and discharging controller that can control overcharging or discharging of the battery pack is an essential equipment.

4. An inverter is a device that converts direct current into alternating current. Due to the fact that solar cells and batteries are DC power sources and loads are AC loads, inverters are essential. Inverters can be divided into independent operating inverters and grid connected inverters according to their operation mode. Independent operating inverters are used for solar cell power generation systems that operate independently and provide power to independent loads. Grid connected inverters are used in solar cell power generation systems for grid connected operation. Inverters can be divided into square wave inverters and sine wave inverters according to their output waveform. The square wave inverter has a simple circuit and low cost, but it has a large harmonic component and is generally used in systems with less than a few hundred watts and low harmonic requirements. Sine wave inverters are expensive, but they can be suitable for various loads.

5. Due to the fact that compared to a fixed solar photovoltaic power generation system at a certain location, the tracking system constantly changes the angle of the sun's illumination during the four seasons of spring, summer, autumn, and winter, with daily sunrise and sunset. If the solar panels can face the sun at all times, the power generation efficiency will reach its optimal state.