Smart meters use the design of electronic integrated circuits, so compared with inductive meters, smart meters have great advantages in terms of performance and operational functions.
Because smart meters are designed with electronic components, the power consumption of each meter is generally only about 0.6-0.7W. For multi-user centralized smart meters, the average power to each household is even smaller. Generally, the power consumption of each induction meter is about 1.7W.
As far as the error range of the meter is concerned, the measurement error of a 2.0-level electronic energy meter within the range of 5% to 400% of the calibrated current is ±2%, and the currently widely used accuracy level is 1.0, and the error is smaller. The error range of the inductive energy meter is 0.86% to 5.7%, and due to the insurmountable defect of mechanical wear, the inductive energy meter is running slower and slower, and the final error is getting bigger and bigger. The State Grid once conducted a spot check on inductive meters, and found that more than 50% of the inductive meters had errors beyond the allowable range after 5 years of use.
The overload multiple of a smart meter can generally reach 6 to 8 times, and it has a wide range. At present, 8-10 magnification watches are becoming the choice of more and more users, and some can even reach a wide range of 20 magnifications. The operating frequency is also wide, ranging from 40 to 1000 Hz. The overload multiple of the induction meter is generally only 4 times, and the operating frequency range is only 45 ~ 55Hz.
Because the smart meter adopts electronic technology, it can be connected to the computer through the relevant communication protocol, and the control and management of the hardware can be realized through the programming software. Therefore, the smart meter not only has the characteristics of small size, but also has the functions of remote control, multi-rate, identification of malignant loads, anti-stealing, prepaid electricity, etc., and can meet the control functions by modifying different parameters in the control software. different requirements, which are difficult or impossible for traditional induction meters.
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