HouLin Intelligent Engineering Co., Ltd

Both globally and in China, conventional energy sources are very limited. China's disposable energy reserves are far below the world average, accounting for only about 10% of the world's total reserves. Solar energy is an inexhaustible renewable energy source for human beings, with advantages such as sufficient cleanliness, absolute safety, relative universality, long lifespan and maintenance free, abundant resources, and potential economy. It plays an important role in long-term energy strategies.

Compared with commonly used thermal power generation systems, the advantages of photovoltaic power generation are mainly reflected in:

① No risk of depletion;

② Safe and reliable, no noise, no pollution emissions, absolutely clean (pollution-free);

③ Not limited by the geographical distribution of resources, it can take advantage of the advantages of building roofs; For example, areas without electricity and areas with complex terrain;

④ On site power generation and supply without the need to consume fuel or install transmission lines;

⑤ High energy quality;

⑥ Users are easily accepted emotionally;

⑦ The construction period is short, and the time required to obtain energy is also short.

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

Battery array

In the presence of light (whether from the sun or other luminous sources), the battery absorbs light energy and accumulates opposite numbered charges at both ends, resulting in the generation of "photovoltaic voltage", which is known as the "photovoltaic effect". Under the action of the photovoltaic effect, the two ends of a solar cell generate electromotive force, which converts light energy into electrical energy, making it 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.

Battery pack

Its function is to store the electrical energy generated by the solar cell array when illuminated and 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 required; f. Wide working temperature range; g. Low price.

controller

It is a device that can automatically prevent overcharging and overdischarging of batteries. Due to the fact that the number of cycles and depth of discharge of a battery are important factors determining its service life, a charge discharge controller that can control overcharging or overdischarging of the battery pack is an essential device.

inverter

Photovoltaic power generation 1

It is a device that converts direct current into alternating current. Due to the fact that solar cells and batteries are DC power sources and the load is AC load, inverters are essential. Inverters can be divided into independent operating inverters and grid connected inverters according to their operating modes.

The independent operation inverter is used for a solar cell power generation system that operates independently and supplies 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 below a few hundred watts with low harmonic requirements. Sine wave inverters have high costs, but can be applied to various loads.

tracking system

Due to the fact that compared to a solar photovoltaic power generation system in a fixed location, the angle of sunlight is constantly changing during the four seasons of spring, summer, autumn, winter, and sunrise and sunset. If the solar panels can always face the sun, the power generation efficiency will reach a better state.

The commonly used sun tracking control systems in the world need to calculate the angle of the sun at different times of the year based on the latitude and longitude information of the placement point, and store the position of the sun at each time of the year in PLC, microcontroller or computer software, that is, by calculating the position of the sun to achieve tracking. The computer data theory is used, which requires data and settings for the latitude and longitude regions of the Earth. Once installed, it is inconvenient to move or disassemble, and each time it is moved, the data must be reset and various parameters adjusted; The principles, circuits, technology, and equipment are complex, and non professionals cannot operate them casually. Install the solar power generation system equipped with an intelligent solar tracker on high-speed cars, trains, communication emergency vehicles, special military vehicles, warships, or ships. No matter where the system is traveling, how it turns, or turns, the intelligent solar tracker can ensure that the required tracking location of the equipment is facing the sun.