Bill Gates once said: “In the near future, homes without smart home systems will not be as fashionable as homes without access to the Internet today.†As smart homes gradually enter the public view, it is quietly leading a smart life. The trend. Have you ever experienced smart homes? What do you feel about smart homes and smart products? What do you think about the smart life of the future? At the beginning of the new year, the "Smart Life" page of the "Letters to Green Energy" weekly will be launched." "Smart dreams shine into reality" essay-raising activities are welcome. When you come home after a hard day's work, all home appliances have been started according to the appointment mode, air-conditioning has been opened early in time, the indoor temperature is cool and suitable, and the bath water in the water heater has been put on standby. Rice cookers are already overflowing with rice. This is not a picture of future life in a science fiction movie, nor is it exclusive to Bill Gates' “House of the Futureâ€. In 2011, Beijing Lianxiangyuan Community became the first smart residential community in China that operates commercial operations for ordinary residents. Residents of this community can enjoy smart electricity service for one year by selecting five types of smart electricity service packages ranging from 1,000 yuan to 3,300 yuan per year.
Nowadays, residents can conveniently view the power consumption details at home, accurately control the power consumption of each home appliance, and can perform regular energy-saving control on some household appliances that consume large amounts of electricity; they can use the Internet, smart phones, and a touch-based device similar to ipad. Intelligent interactive terminal, remote control of home appliances, water heating and cooking can be done with just one finger; when you leave home, you can choose the out mode to start remote security monitoring. When an outsider breaks in, the smoke concentration exceeds the set value, or When a gas leak occurs, the alarm information will be automatically sent to the property and residents' mobile phones; residents can also enjoy broadband services up to 100 MB to achieve Internet surfing, on-demand viewing of high-definition movies and other functions; residents can pay at home through smart payment terminals, No longer need the power supply bureau or banks to pay in line; in addition, community services such as community water exchange stations, community medical care, community properties, and community canteens (telephone ordering) are also gradually being incorporated into this service system.
It is understood that the State Grid Information and Communication Co., Ltd. has started the construction of 35 demonstration and pilot projects for 35 households, including fiber-to-the-home and smart residential communities, in 33 cities across the country. A series of explorations such as the development of smart communities and smart parks through information and communication technologies such as optical fiber-to-the-home communications, and a door to a new life of “intelligent use of electricity†in the future are being opened for the people. The mature and popularization of the power fiber-to-the-home technology provides an easy-to-implement high-speed network transmission method for the ordinary residents to realize “intelligent†life.
On-Grid Inverter converts DC power to AC power for feeding back to the grid. The frequency of the output voltage of the grid-connected inverter needs to be the same as the grid frequency (50 or 60Hz), which is generally achieved by the oscillator in the machine, and the output voltage will also be limited not to exceed the grid voltage. Modern high-quality grid-connected inverters can have an output power factor of 1, which means that the output voltage and current phases are the same, and the phase difference between them and the grid voltage is within 1 degree. There is a microprocessor in the inverter that can sense the AC waveform of the grid, and according to this waveform, generate voltage and send it back to the grid. However, the electricity sent back to the grid needs to have a certain proportion of reactive power, so that the power of the nearby grid is within the allowable limit. noon) its voltage may rise too high.
If the power of the grid is cut off, the grid-connected inverter needs to be disconnected from the grid quickly. This is a regulation of the National Electrical Code (NEC) in the United States to ensure that when the grid is out of power, the grid-connected inverter will not provide power to the grid, and at this time the workers who maintain the grid will not be electrocuted.
Properly configured, grid-tie inverters allow a home to use alternative energy sources that it generates itself (such as solar or wind power) without cumbersome wiring and without the need for batteries. If there is insufficient alternative energy, the insufficient part will still be provided by electricity from the grid.
Grid-connected inverters are widely used in household photovoltaic power generation systems, commercial and industrial photovoltaic power plants and other scenarios. By connecting to the grid, they help to achieve efficient use of renewable energy and reduce carbon emissions, promoting sustainable development and popularization of clean energy.
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