The combination of solar power with wind power, modern agriculture, and poverty alleviation projects constitutes a photovoltaic + model. When it comes to the specific application of the photovoltaic industry, most people will have a photovoltaic power plant built in the western Gobi Desert or the desert, or a distributed power plant built on the roof of an industrial plant. Due to the low energy density of solar radiation, the construction of photovoltaic power plants generally requires large areas of cheap land, such as the Gobi Desert, semi-fixed deserts and saline-alkali lands. For a long time, China has mainly developed photovoltaic industry in Xinjiang, Qinghai, Gansu, Inner Mongolia and other places. However, due to the limited number of places suitable for construction in these areas, and the relatively high cost of transporting these electricity from the desert to the more developed coastal and southern areas, China's current photovoltaic power plants have encountered development bottlenecks. The speed has gradually slowed. The photovoltaic + model points out a new development path for the solar industry, which not only solves the limitations of Taineng itself, but also effectively uses land resources, and is more likely to bring blood-generating capabilities to poor farmers.

 

Solar energy and wind energy are the most common natural resources and inexhaustible renewable energy sources, and they are highly complementary in time distribution. When the sun is the strongest during the day, the wind is small, and at night, the light is weak, but the wind energy is strengthened due to the large change in surface temperature. In the summer, the intensity of the sun is large and the wind is small. . The temporal complementarity of solar energy and wind energy makes the wind-solar complementary power generation system have a good match in resource distribution, so the wind-solar complementary power generation system established is a good independent power supply system in terms of resource conditions.

 

A photovoltaic system is a system that uses photovoltaic components to convert solar energy into electrical energy, then charges the battery through a controller, and finally supplies power to an electrical load (AC load) through an inverter. The advantages of this system are high system power supply reliability, low operation and maintenance costs, and disadvantages are high system cost. The wind power system is a system that uses small wind turbines to convert wind energy into electrical energy, then charges the battery through the controller, and finally supplies power to the electrical load through the inverter. The advantages of this system are higher system power generation, lower system cost, lower operation and maintenance costs, and the disadvantages are low reliability of small wind turbines.

 

Although wind power and photovoltaic systems can provide stable power supply after the introduction of battery energy storage equipment, the daily power generation of the system is greatly affected by the weather, which will cause an imbalance in the power supply and power load of the system, causing the battery pack to be in a state of power loss. Or overcharged state, long-term operation will reduce the service life of the battery pack and increase the maintenance investment of the system. Considering that wind power and photovoltaic systems can be used universally in battery packs and inverters, the establishment of wind-solar complementary power generation systems is possible in technical applications, and at the same time, the design capacity of energy storage equipment-batteries can be reduced, which eliminates the supply and demand of system power Imbalance, which reduces both system investment and system maintenance workload. Therefore, from the perspective of technical evaluation, the wind-solar hybrid power generation system is a reasonable independent power supply system.

 

The wind-solar complementary power generation system makes up for the respective shortcomings of the wind power and photovoltaic independent systems in resources. In the technical application, the independent wind power and photovoltaic systems can be rationally integrated through the energy storage link. The wind-solar complementary power generation system can reasonably configure the system capacity according to the user's power load situation and resource conditions, which can ensure the power supply reliability of the power generation system and reduce the cost of the power generation system. Regardless of the environment and power requirements, the wind-solar hybrid power generation system can make an optimal system design solution to meet the user's requirements.

 

Photovoltaic + agriculture as a new form of agriculture, photovoltaic agriculture has pointed out a "industrial-like" green development path for modern agriculture. As photovoltaic power generation not only solves the power supply problems required for water intake irrigation and mechanical power, but also produces excess electricity for online output, photovoltaic agriculture is an important form of agricultural engineering that meets the requirements of the biological chain relationship and the production of raw material energy systems. In the long run, the development of photovoltaic agriculture can not only solve the current situation of land disputes between the photovoltaic industry and agricultural development, but also be of great significance to China's agricultural transformation.

 

The photovoltaic + agricultural model is mainly realized by setting up solar panels or photovoltaic films with different transmittances on agricultural greenhouses. Its advantages are: firstly, because it has a certain degree of light transmission, it can not only meet the lighting needs of different crops, but also be able to grow various high value-added crops such as organic agricultural products and valuable seedlings; Off-season cultivation. Secondly, the photovoltaic agricultural greenhouse uses the roof of the agricultural greenhouse, so it can save land resources. Finally, as a new type of agricultural production and management mode, while promoting the promotion and application of regional agricultural science and technology, through the realization of agricultural science and technology and agricultural industrialization, it will become a pillar industry for regional agricultural efficiency and farmers' income. For example, the photovoltaic agricultural greenhouse combines agriculture, ecology and tourism, and uses rural landscapes, agricultural production activities, agro-ecological environment, and eco-agricultural management modes to attract tourists from surrounding cities for short-term stays on weekends and holidays with characteristic tourism projects close to nature. To maximize the use of resources and increase tourism revenue.

 

In the context of related national policies that inhibit the construction of large-scale centralized ground power stations, and distributed development, and encountering "good roofs that are difficult to find", photovoltaic vegetable greenhouses, "fish-light complementary" aquaculture, solar pest control and other agricultural applications, It brings new opportunities for the development of domestic photovoltaic + agriculture. Photovoltaic technology and products have broad application prospects and great practical significance in modern agriculture. Some experts have calculated that if photovoltaic agricultural products are to be promoted on a large scale and across the country, the market will reach 100 billion yuan, and it will reach 1 trillion yuan within 5 years.

 

The combination of photovoltaic power generation and poverty alleviation has realized the transformation of poverty alleviation and development from "transfusion-type poverty alleviation" to "blood-making type poverty alleviation", and has created a new path for the benefit of agriculture, environmental protection and the win-win situation of photovoltaic industry. With the strong support of the government and grid companies, distributed photovoltaic power generation may change the face of poor areas.

 

Photovoltaic poverty alleviation began in Hefei, Anhui Province. In 2013, the Hefei Municipal Government selected 105 rural poor families in the city to carry out pilot work on the construction of distributed photovoltaic power stations, and explored a new way for poor rural households with “no labor, no funds, and no stable source of income” to get rid of poverty. The pilot project has ensured the basic livelihood of many poor people. The first batch of pilot power stations in Hefei City generated 90MWh of electricity and 73MWh of grid-connected electricity. The average household income increased by 632 yuan quarterly, and a maximum of one household received 1093 yuan.

 

Photovoltaic poverty alleviation projects can bring stable household income to poor households. Today, with the increasingly prominent contradiction between resources and the environment, it can reduce the burden on the environment and change the way energy is used. However, to use photovoltaic power to achieve poverty alleviation, the most important thing is to make electricity available on the grid. This requires the "last mile" of the power grid to connect decentralized photovoltaic power plants to the grid. Therefore, the construction and maintenance of the power grid plays a vital role in the poverty reduction work of photovoltaics. Previously, the State Grid Corporation of China and China Southern Power Grid Corporation have both launched the grid-connected work of individual distributed photovoltaic power plants, and formulated a series of preferential service measures, including providing free access system solutions for owners, grid connection testing, and commissioning. Process services, free of system backup fees, full purchase of surplus power in accordance with national policies, etc.

 

In the context of the country's vigorous development of a low-carbon and green economy, favorable policies, favorable technology, and favorable environment are beneficial to the development of photovoltaics and the industry. It is expected that by 2020, the consumption of wind-solar complementary distributed energy will be cheaper than fossil energy. During the "Thirteenth Five-Year Plan" period, we will promote the development of new energy sources to achieve targeted poverty alleviation, and make wind and solar energy-rich regions in the central and western regions use distributed energy sources, green grids, intelligent micro-grids, and new urbanization. Carriers can quickly drive them out of poverty to become rich and move towards a well-off society. Due to the construction of integrated agricultural and photovoltaic power stations, combining traditional agricultural planting and photovoltaic power generation, the comprehensive utilization of land for photovoltaic power generation projects has been improved, and the three-dimensional and efficient use of sunlight and land resources has been favored by many regions.