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The composition and maintenance of solar light tower

The composition and maintenance of solar light tower

The mobile light tower is a system composed of a trailer, a lifting mast, a power supply, and lighting equipment. Various equipment such as lighting equipment and other equipment are reasonably installed on the trailer, and combined into a complete set of movable lighting system. The mobile lighthouse can be easily transported to places that can be opened to traffic and need large-scale lighting temporarily, and it is very convenient to use.

We all know that the power to the light tower can be diesel generators, gasoline generators. Today we’re going to talk about the solar power that powers the light tower.

Solar energy is a renewable energy source. Refers to the sun’s thermal radiation energy, the main performance is often said that the sun’s rays. In modern times, it is generally used to generate electricity or to provide energy for water heaters.

A photovoltaic panel module is a power generation device that generates direct current when exposed to sunlight, and consists of solid photovoltaic cells made almost entirely of semiconductor materials such as silicon. Simple photovoltaic cells can provide energy for watches and computers, and more complex photovoltaic systems can provide lighting for houses as well as traffic lights and monitoring systems, which are integrated into the grid. Photovoltaic panel components can be made in different shapes, and the components can be connected to generate more electricity. Photovoltaic panel assemblies can be used on rooftops and building surfaces, or even as part of windows, skylights or shading devices. These photovoltaic installations are often referred to as building-attached photovoltaic systems.

A photovoltaic panel module is a power generation device that generates direct current when exposed to sunlight, and consists of solid photovoltaic cells made almost entirely of semiconductor materials such as silicon. Simple photovoltaic cells can provide energy for watches and computers, and more complex photovoltaic systems can provide lighting for houses as well as traffic lights and monitoring systems, which are integrated into the grid. Photovoltaic panel components can be made in different shapes, and the components can be connected to generate more electricity. Photovoltaic panel assemblies can be used on rooftops and building surfaces, or even as part of windows, skylights or shading devices. These photovoltaic installations are often referred to as building-attached photovoltaic systems.

The solar power generation system consists of a solar cell group, a solar controller, and a battery (group). If the output power is AC 220V or 110V, an inverter is also required.

Solar power generation systems are divided into off-grid power generation systems and grid-connected power generation systems.

Off-grid power generation system. It is mainly composed of solar cell components, controllers, and batteries. To supply power to the AC load, an AC inverter needs to be configured.

The grid-connected power generation system is that the direct current generated by the solar modules is converted into alternating current that meets the requirements of the mains grid through the grid-connected inverter, and then directly connected to the public grid. The grid-connected power generation system has centralized large-scale grid-connected power stations, which are generally national-level power stations. However, this kind of power station has not developed much due to its large investment, long construction period and large area. The decentralized small grid-connected power generation system, especially the photovoltaic building-integrated power generation system, is currently the mainstream of grid-connected power generation due to its advantages of small investment, fast construction, small footprint, and strong policy support.

An off-grid power generation system is used on the solar light tower.

The solar panel is the core part of the solar power generation system. The function of the solar panel is to convert the light energy of the sun into electrical energy, and then output the direct current and store it in the battery. The solar panel is one of the most important components in the solar power generation system, and its conversion rate and service life are important factors that determine whether the solar cell has use value.

What are the characteristics of solar module raw materials?

The solar cells are encapsulated with high-efficiency (above 16.5%) monocrystalline silicon solar cells to ensure sufficient power generated by the solar panels.

Glass, using low-iron tempered suede glass (also known as white glass), thickness 3.2mm, light transmittance of more than 91% in the wavelength range of solar cell spectral response (320-1100nm), for infrared light greater than 1200nm higher reflectivity. At the same time, the glass can withstand the radiation of solar ultraviolet rays, and the light transmittance does not decrease.

EVA, a high-quality EVA film layer with a thickness of 0.78mm added with anti-ultraviolet agent, antioxidant and curing agent is used as the sealing agent of solar cells and the connecting agent between glass and TPT. Has high transmittance and anti-aging ability.

TPT, the back cover of solar cells – the fluoroplastic film is white and reflects sunlight, so the efficiency of the module is slightly improved, and because of its high infrared emissivity, it can also reduce the operating temperature of the module, also Conducive to improving the efficiency of components. Of course, the fluoroplastic film first has the basic requirements of aging resistance, corrosion resistance, and airtightness required by solar cell packaging materials.

The aluminum alloy frame used in the frame has high strength and strong resistance to mechanical impact. It is also the most valuable part of the solar power system.

The solar controller is composed of a dedicated processor CPU, electronic components, displays, switching power tubes, etc.

What are the main features of the solar controller?

The solar controller uses a single chip microcomputer and special software to realize intelligent control.

Accurate discharge control using battery discharge rate characteristic correction. The end-of-discharge voltage is a control point corrected by the discharge rate curve, which eliminates the inaccuracy of simple voltage control over-discharge, and conforms to the inherent characteristics of the battery, that is, different discharge rates have different end-of-charge voltages.

The solar controller has automatic control such as overcharge, overdischarge, electronic short circuit, overload protection, and unique anti-reverse connection protection; the above protection does not damage any components and does not burn the insurance.

The solar controller adopts a series PWM charging main circuit, which reduces the voltage loss of the charging circuit by nearly half compared with the charging circuit using diodes, and the charging efficiency is 3%-6% higher than that of non-PWM, which increases the power consumption time; Enhanced charging, normal direct charging, and automatic floating charging control methods enable the system to have a longer service life; at the same time, it has high-precision temperature compensation.

Intuitive LED light-emitting tube indicates the current battery status, allowing users to understand the usage status.

All controls use industrial-grade chips (only for industrial-grade controllers with I), which can run freely in cold, high temperature, and humid environments. At the same time, the crystal oscillator timing control is used, and the timing control is precise.

The solar controller cancels the potentiometer to adjust the control set point, and uses the E-square memory to record each work control point, digitizes the setting, and eliminates the error of the control point due to the vibration deviation and temperature drift of the potentiometer, reducing the accuracy, factors of reliability.

The solar controller uses digital LED display and settings, one-button operation can complete all settings, the use is extremely convenient and intuitive to control the working state of the entire system, and play the role of overcharge protection and overdischarge protection for the battery. In places with large temperature difference, a qualified controller should also have the function of temperature compensation. Other additional functions such as light-controlled switches and time-controlled switches should be optional for the controller.

What are the advantages of solar light tower?

The sun shines on the earth, and there are no geographical restrictions. No matter whether it is land or sea, no matter mountains or islands, it is everywhere. It can be directly developed and utilized, easy to collect, and does not need to be mined and transported.

The development and utilization of solar energy will not pollute the environment, it is one of the cleanest energy sources, which is extremely valuable in today’s increasingly serious environmental pollution.

The solar radiation energy reaching the earth’s surface every year is equivalent to about 130 trillion tons of coal, the total amount of which is the largest energy that can be developed in the world today.

What are the disadvantages of solar light tower?

Although the total amount of solar radiation reaching the Earth’s surface is large, the energy flux density is very low. On average, near the Tropic of Cancer, when the weather is relatively clear in summer, the irradiance of solar radiation is the largest at noon, and the average solar energy received on an area of 1 square meter perpendicular to the direction of sunlight is about 1,000W; The average day and night throughout the year is only about 200W. In winter, it is only about half, and cloudy days are generally only about 1/5, so the energy flux density is very low. Therefore, in order to obtain a certain conversion power when using solar energy, a set of collection and conversion equipment with a considerable area is often required, and the cost is relatively high.

Due to the limitations of natural conditions such as day and night, seasons, geographic latitude and altitude, and the influence of random factors such as sunny, cloudy, cloudy, and rainy, the solar irradiance reaching a certain ground is both intermittent and extremely unstable. , which makes the large-scale application of solar energy more difficult. In order to make solar energy a continuous and stable energy source, and finally become an alternative energy source that can compete with conventional energy sources, the problem of energy storage must be well solved, that is, the solar radiation energy during the sunny day should be stored as much as possible for nighttime or rainy weather. However, energy storage is also one of the weaker links in solar energy utilization.

The development level of solar energy utilization is theoretically feasible and technically mature in some aspects. However, some solar energy utilization devices have low efficiency and high cost, and the current laboratory utilization efficiency does not exceed 30%. In general, the economy cannot compete with conventional energy sources. For a considerable period of time in the future, the further development of solar energy utilization will be mainly restricted by economics.

At this stage, solar panels have a certain lifespan. Generally, solar panels need to be replaced every 3-5 years at most, and the replaced solar panels are very difficult to be decomposed by nature, resulting in considerable pollution.

The use of solar light tower will save fuel costs, so how should solar photovoltaic panel components be maintained?

Photovoltaic modules should be checked regularly, and if the following problems are found, the PV modules should be adjusted or replaced immediately. Photovoltaic modules have broken glass, scorched backplanes, and obvious color changes; there are air bubbles in the PV modules that form a communication channel with the edge of the module or any circuit; the PV module junction box is deformed, twisted, cracked or burned, and the terminals cannot be good touch.

It is necessary to regularly check whether the metal bracket of the solar cell array is corroded, and to regularly carry out paint and anti-corrosion treatment on the bracket. The phalanx support should be well grounded.

In use, the photoelectric parameters and output power of the solar cell array should be checked regularly (such as 1 to 2 months) to ensure the normal operation of the battery array.

In use, the packaging and connection joints of solar photovoltaic modules should be checked regularly (such as 1 to 2 months). If it is found that the packaging is opened and glued, the cells are discolored, and the joints are loose, disconnected, and corroded. Repair or replace them in time.

To keep the lighting surface of the solar photovoltaic module square array clean, if there is dust, it can be cleaned with a clean wire duster. If the dirt cannot be removed, rinse it with clean water, and then dry the water with a clean rag. Do not clean with corrosive solvents or wipe with hard objects. When there is snow, clean it up in time.