At present, the intelligent watt-hour meter is one of the important equipment in Chinese power grid construction, which is beneficial to realize the full coverage collection of electricity information. Intelligent electricity meters play an important role in the stable and safe operation of the power grid with many advantages such as rich functions, flexible expansion and diverse interfaces.
The purpose of an energy meter is to measure how much electricity is consumed by a circuit, and to measure the value of each unit of electricity consumed, which is also known as degrees or kilowatt-hours....
Intelligent watt-hour meter as the smart grid, electricity marketing information and energy distribution at the end of the equipment, covering a wide range, in the process of energy for the construction of the Internet have been given a new mission and task, a new generation of intelligent watt-hour meter based on satisfy the measurement function, need to meet more flexible access of intelligent equipment, equipment of perception, data acquisition and control, Constantly adapt to the needs of energy Internet construction and people's increasingly diverse service needs.
Classification of electricity meters
1, according to the structure and working principle of the watt-hour meter is different, can be divided into induction mechanical watt-hour meter and electronic digital watt-hour meter two kinds, the induction mechanical watt-hour meter number, the most widely used.
2. According to the number of phases measured by the watt-hour meter, it can be divided into single-phase watt-hour meter and three-phase watt-hour meter. At present, household users are basically single-phase electricity meters, and industrial power users are usually three-phase electricity meters.
Electricity meter related principles
Induction mechanical watt-hour meter
Working principle: According to the principle of electromagnetic induction, when the meter is powered on, the electromagnetic field will be generated in the current coil and voltage coil, and the rotation torque will be formed on the aluminum disk. The meter will be driven to count by the transmission gear. The greater the current voltage, the greater the torque, the faster the count and the more electricity. The rotational moment of the aluminum disc is proportional to the active power of the load.
The working principle of electronic watt-hour meter:
Meter working principle of this kind of classification is different, with partial pressure resistance or voltage signal into voltage transformer can be used for electronic measurement of small signal, using shunt or current transformer current signal into can be used for electronic measurement of small signal, using special power measurement chip will transform a good voltage and current signals are analog or digital multiplication, and the energy accumulated, Then the output frequency is proportional to the electrical energy pulse signal: pulse signal drive stepper motor to drive the mechanical meter display, or sent to the microcomputer after processing digital display