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Smart meter installation and use penetration rate has basically reached 100% in both urban and rural areas in China.Urban smart Power meters and rural smart Power meters are the same in function, and according to the difference in the installation environment of urban and, the communication methods of smart meters are different. Compared with traditional electricity meters, smart electricity meters have a lot more parameters and functions, and what questions will arise from the lack of awareness of these new contents by end users?
1. What role can Bluetooth communication of Bluetooth smart meters play?
Bluetooth smart meter can be connected to the smart meter home energy monitor through Bluetooth communication, and the electricity consumption data at home can be transmitted to the smart meter home energy monitor in real time, and the user can view the power consumption data, event information and the notification content of the power operator at any time. Connect with the electricity meter through the mobile phone Bluetooth function, and use the supporting mobile phone APP to view data and information in real time.
2. Can the smart meter turn off the power? Can a smart meter lose power?
It is possible to cut off the power through the smart meter, and the relay is designed inside the smart meter to control the load. When the load power is greater than the set value, the smart meter turns off the power; When the grid capacity is insufficient, the power supply is stopped by disconnecting the relay through remote communication. In addition, the power supply can be disconnected and turned on according to the power demand during the period.
3. How long can the data be stored after the smart meter is cut off?
The data storage of smart meters is EEPROM or ferroelectric, and the number of data storage times of such devices is much greater than the life of smart meters; Smart meters are designed with the time required for data storage, and capacitors and batteries are available to maintain the working time enough to complete data preservation in the event of a power outage. Data can be stored for a long time after a smart meter power outage.
4. What does VA mean on LCD display?
VA is the unit symbol for the apparent power of a smart meter. Apparent power can be said to be the sum of active power and reactive power, from the calculation formula: apparent power = voltage × current
5. What does the smart meter power factor do?
Power factor is a measure of the efficiency of electrical equipment, and its size is related to the nature of the load. For resident users, this parameter has little to do with it; For industrial enterprise users, the power bureau will monitor the power factor data and evaluate the enterprise. In China, the power factor of industrial enterprises must be greater than 0.9, otherwise the power bureau will punish the enterprise. Therefore, industrial enterprises will add reactive power compensation cabinets in the distribution room to ensure that the power factor is greater than 0.9.
As one of the key terminal products of smart grid construction, smart meter plays an important supporting role in realizing informationization, automation and interactive management of power grid. According to the survey report of relevant international research institutions, as early as 2016, the global smart meter penetration rate was about 30%, and as countries in the world are accelerating the development of smart grid, the global smart meter penetration rate may reach 53% by 2025.
