What is the wind-solar complementary power supply system? What are its working principles and applications?

First, what is the wind-solar complementary power supply system

The wind-solar complementary power supply system is mainly composed of wind turbines, solar photovoltaic cells, controllers, batteries, inverters, AC and DC loads, etc. The system is a composite renewable energy power generation system integrating energy generation technology such as wind energy, solar energy, batteries and system intelligent control technology.

Wind or solar power alone is severely limited by natural conditions, but it is highly complementary in time and space. Therefore, combining the two to form a wind-solar complementary power supply system can largely solve the intermittence of wind or solar power generation alone. In terms of power supply and wired transmission, there is no need to build large-scale transmission networks, laying optical fiber transmission networks, reducing costs; Cheaper and safer than grid power.

Second, the principle of wind-solar complementary power supply system

1. The wind power generation part uses the wind turbine to convert the wind energy into mechanical energy, and then converts the mechanical energy into electrical energy through the wind turbine, and then charges the battery through the controller, and supplies power to the load through the inverter;

2, the photovoltaic power generation part uses the photovoltaic effect of solar panels to convert light energy into electricity, and then charges the battery, and then converts direct current into alternating current through the inverter to supply power to the load;

3, the inverter system is composed of a number of inverters, the direct current in the battery into the standard 220V AC, to ensure the normal use of AC load equipment. At the same time, it also has the function of automatic voltage regulation, which can improve the power supply quality of wind-wind complementary power supply system.

4, the control part according to the sunshine intensity, wind and load changes, constantly switch and adjust the working state of the battery pack: on the one hand, the adjusted electric energy directly into the DC or AC load. Excess power, on the other hand, is sent to a battery pack for storage. When the power generation can not meet the load demand, the controller will send the battery power to the load to ensure the continuity and stability of the whole system;

5, the battery part is composed of a plurality of batteries, in the system at the same time to play two roles in energy regulation and load balance. It converts electrical energy output from wind power systems and photovoltaic power generation systems into chemical energy and stores it for use when power is in short supply.

Depending on the variation of wind and solar radiation, the wind-solar complementary power supply system can operate in the following three modes: the wind generator alone supplies power to the load; The photovoltaic power generation system separately supplies power to the load; Wind turbines and photovoltaic power systems work together to supply power to the load.

Principle of wind-wind complementary power supply system

Third, the application of wind-solar complementary power supply system

Widely used in safe city construction, smart forestry, smart agriculture, smart transportation, smart water conservancy, smart power grid, border and coastal defense, petroleum and petrochemical, meteorological environmental protection, environmental monitoring, ecological protection, disaster warning, military police, coal mining metallurgy, power generation groups, operator base stations and other fields of system power supply, the specific classification is as follows:

1. Intelligent water conservancy: river length system, lake length system, river monitoring, groundwater resource monitoring, water quality monitoring, reservoir monitoring, water flow monitoring and power supply;

2, smart forestry: forest import and export auxiliary bayonet monitoring, sky eye monitoring, forest fire monitoring, straw burning power supply;

3, intelligent transportation: video surveillance along the highway, electronic police, bayonet capture, tunnel lighting, road monitoring, traffic investigation equipment, high-speed rail monitoring along the railway, port video surveillance, maritime video surveillance power supply system;

4. Smart power grid: online monitoring and monitoring of overhead transmission, early warning and monitoring system of overhead transmission line against external force breaking, online monitoring of overhead transmission line icing, online monitoring of overhead transmission line micro-weather monitoring and power supply system;

5, smart agriculture: agricultural Internet of things, agricultural products traceability, farmland irrigation, soil monitoring, aquaculture monitoring power supply system;

6. Safe City construction: Safe city monitoring, Skynet project, Xueliang project monitoring power supply system;

7. Ecological protection: wetland nature reserve monitoring, wildlife monitoring and protection monitoring power supply system;

8, disaster warning: flash flood disaster warning, meteorological disaster warning, geological disaster warning, natural disaster warning;

9. Petroleum and petrochemical: well site/plant station monitoring, valve chamber monitoring, combustible gas monitoring, pipeline cathodic protection, oil and gas field data, oil pipeline monitoring and power supply system;

10, meteorological environmental protection: air temperature and humidity monitoring, PM2.5 monitoring, water and rain satellite monitoring, weather station, sewage treatment plant, pollution source monitoring power supply system;

11. Military and police fields: anti-smuggling video surveillance, border posts, island border defense, individual combat equipment power supply system;

12, coal metallurgy: coal mine safety monitoring, land resources mine monitoring power supply system;

13, power generation group: thermal power plant monitoring, hydropower station monitoring, wind farm monitoring power supply system;

14, operator: base station, micro base station, communication guarantee power supply system.