At 7 o'clock in the morning, the alarm clock of Gree's mobile phone rang, and the mobile phone remote control rice cooker began to make breakfast.
This 30m2 human-built photovoltaic cabin adopts pure DC power supply system, air conditioner, refrigerator, induction cooker, rice cooker, humidifier, electric fan, dehumidifier, etc., which are DC-modified, safe and efficient.
When going out, the photovoltaic cabin's outgoing mode can store the DC power generated by the photovoltaic when the household appliances are not using electricity.
When the battery is also fully charged, the DC power generated by the PV can also be converted into AC power for sale to the public power grid.
In the afternoon, the weather is fine and the sun is shining. The photovoltaic system can generate electricity to meet the electricity consumption of all household appliances, and realize the 'zero electricity bill'.
In the evening rainy days, photovoltaic power generation can not meet the power load.
At this time, the cloudy mode of the photovoltaic hut can be based on the peak-to-valley time period, and the intelligent dispatching preferentially uses the grid power supply or the energy storage power supply, and the photovoltaic system provides auxiliary power generation.
At night, the photovoltaic system does not generate electricity, the grid is auxiliary power supply, and the energy storage equipment is charged in the valley.
Gree Photovoltaic Future House (container version) is currently equipped with Gree Information Energy Management System (G-IEMS), built with 30m2 Habitat, 15m2 Habitat and 15m2 office. It is a 100kW IEMS AC/DC double loop network three-dimensional experiment. System, system self-use, self-sufficiency, and achieve energy dispatch between power grid, photovoltaic, energy storage system.
The cabin is a DC microgrid system based on air-conditioning DC bus for energy exchange. It combines clean power generation, safe power storage, reliable power conversion, and efficient power consumption. The system can realize and switch freely from the network, effectively reducing the home life to public electrical energy. rely.
Gree G-IEMS can be customized for family level (G-HIEMS), building level (G-BIEMS), factory level (G-FIEMS), and park level (G-RIEMS) system solutions according to different application scenarios.
Photovoltaic huts are important for transforming energy consumption, promoting clean energy development, achieving fine energy management, and leading green energy consumption habits. However, in the promotion process, there are also some criticisms. So what is the truth?
Opinion 1: Photovoltaic engineering is just a show, no practical effect.
Photovoltaic is a kind of clean and renewable energy. The use of photovoltaic energy has significant economic and environmental benefits, which is of great significance for achieving global sustainable development.
According to estimates, a 15kW air-conditioning photovoltaic DC equipment, the corresponding installed capacity of photovoltaic power is 15kW, the annual power generation capacity of a single design is 15,513 kilowatts, and if the residential electricity price is 0.6 yuan / kWh, each equipment can be used for one year. Save 0.93 million yuan.
In many remote, barren, disaster areas, lack of electricity, instability is still a great inconvenience to people's lives. Gree uses photovoltaic air conditioning as an energy information center, integrated clean power generation, safe storage, reliable power, efficient use of electricity , can effectively reduce the dependence on public electrical energy.
At present, Gree has built more than 5,000 PV systems for 22 countries and regions around the world.
Viewpoint 2: Photovoltaic air conditioning is air conditioning plus photovoltaic panels, not a high-tech.
Zhang Zhaohui, secretary-general of China Refrigeration and Air-Conditioning Industry Association, said that Gree photovoltaic air-conditioning can directly use solar energy to improve solar energy utilization, achieve the goal of optimizing building energy allocation, reducing building energy consumption and reducing carbon dioxide emissions. Expenditure, and achieved energy saving and emission reduction, with subversive green innovation significance.
On this basis, in September 2017, in order to further upgrade energy supply and consumption solutions, Gree successfully developed a local energy Internet system, G-IEMS, to turn energy intelligent dispatching and management into reality.
G-IEMS local energy Internet system inherits photovoltaic direct-drive technology of photovoltaic air-conditioning, ternary commutation technology, integrated power generation and management technology, etc., further researches from equipment to home, buildings, communities, parks, from a single The ternary commutation of the hair net to the energy storage and the change of energy between the multiple units, the volume and depth jump again.
Gree independently developed three-dimensional AC/DC dual-loop network system, multi-variable multi-terminal converter technology, second-order thousand-point polling control network based on DC carrier and industrial Internet, million-level concurrent array management, energy blockchain security technology, etc. Successfully achieved the goal of efficient energy conversion, reliable operation of complex working conditions, free exchange of energy, information transparency and safety control and supervision.
In May of this year, Gree independently researched and developed the 'Key Technology Research and Application Project of Air-Conditioning Optical Storage DC Technology' successfully realized the deep integration of new energy and air-conditioning, DCization of air-conditioning, energy information and refined management, and application of optical storage technology. In the field of miniaturized home central air conditioning, it fills the gap in the multi-connected market for small and medium-sized new energy.
Academician Jiang Yi of the Chinese Academy of Engineering said: 'The breakthrough of Gree's technology will likely change the electricity usage mode of the building. It provides an efficient and safe and reliable power supply method, which can solve both current renewable energy storage and end-use electricity. The mismatch problem allows us to make better use of clean renewable energy. '