Wind solar complementary power supply system

1. System description

1.1 system working principle

During the day, the solar panels generate photovoltaic current under the sunlight, charge the battery under the control of the controller, and provide power for the electrical equipment at the same time, while the wind turbine generates power under the action of wind. If the wind resource is good, the wind turbine will supply power for the load and charge the battery at the same time. If the wind resource is not good, the battery will discharge the electricity stored in the daytime under the control of the controller to provide power for the electrical equipment. If there is an AC equipment in the electrical equipment, the DC power will be converted into AC power through the inverter power supply to supply power for the equipment. When the next morning is dawn, the controller will control the solar battery components to start a new round of charging. As the storage battery has the same function as the reservoir water storage, the electricity stored in the battery will gradually accumulate when there is sunshine. When the battery cannot be charged in rainy days (up to 10 consecutive days are allowed, and the system is designed to be seven days), the electricity stored in the battery at ordinary times can be used for the system to continue to work, and can still provide stable power supply.

In case of long-term continuous rainy days, the solar power generation capacity is insufficient, and the battery voltage continues to drop. When it reaches the set value, the system automatically starts the generator to charge the battery. When the battery voltage rises to the set value, the system will give a signal to shut down the generator, and the generator will shut down automatically.

1.2 advantages of solar power supply system

Green environmental protection, no pollution, no waste;

The service life of crystalline silicon solar cells is up to 25-35 years;

One time investment, long-term benefits, the actual cost of economic use;

No trenching and wiring, local construction, saving engineering time and cost

Stable operation, high efficiency and energy saving, long MTBF (mean time between failures);

Maintenance free use, unattended;

Not affected by geographical environment, suitable for more than 95% of domestic areas;

It is easy to install and use, can be constructed according to local conditions, and is easy to remove and expand;

Compared with 220V AC high-voltage power, it is not easy to cause lightning stroke and has no disadvantages in long-distance transmission;

2. System design

2.1 system design overview

The wind solar complementary power generation system is composed of solar photovoltaic power generation system and wind power generation system. The two power generation systems can work independently and can produce complementary energy in the form of energy utilization. For example, when the weather is sunny in the daytime, the solar power generation system is the main power generation system, and when it is rainy and rainy in the night, the wind power generation system is the main power generation system. The reasonable combination of the two power generation methods makes It can improve the efficiency of energy utilization, improve the reliability of power supply system and reduce the cost of unit power generation.

CE certification for solar modules

2.2 meteorological data

The project is located in Heilongjiang Province. For local natural condition data, see the table below (from NASA website).