Nielsen.com recently released the “research report on the needs and behaviors of mobile social users.†The report shows that people have a strong demand for social networking for interests, and the location-based services (LBS) function of mobile terminals makes O2O-style social networking more convenient. Over 90% of mobile social users use mobile social apps almost every day.
According to the report, as of June 2014, the number of mobile Internet users in China reached 530 million, accounting for 83.4% of the total number of Internet users. Social applications are one of the major applications for mobile users, and 60.2% of mobile users use mobile social software. . More than 90% of mobile social users use mobile social apps almost every day, and the average time per person spent on social media is 1.5 hours per day. Over 70% of users spend their free time using social apps, including 20:00-23:00. Time is the peak period for the use of mobile social applications. There will also be a small peak for mobile social use from 12:00 to 13:00 on working days. This shows that mobile social applications have become increasingly indispensable social tools.
The report also shows that in the mobile Internet phase, mobile social applications have become an important way to find a circle of interest, and O2O-style social networking has become possible. The LBS function enables people to conveniently socialize online and offline, while mobile social networking applications have The great advantage of "anytime, anywhere". From finding interested circles to inviting to participate in offline activities, WeChat, QQ, Sina Weibo, and Momo are channels and channels favored by users.
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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