Smart electric meters use the design of electronic integrated circuits, so compared with inductive electric meters, smart electric meters have great advantages in terms of performance and operating functions.
1) Power consumption. Because smart meters use electronic component design, the power consumption of each meter is only about 0.6 to 0.7W. For a multi-user centralized smart meter, the average power per household is smaller. In general, the power consumption of each inductive meter is about 1.7W.
2) Accuracy. As far as the error range of the meter is concerned, the measurement error of the 2.0-level electronic energy meter in the 5% to 400% calibration current range is ± 2%, and the accuracy level is generally 1.0, which is smaller. The error range of the inductive energy meter is 0.86% to 5.7%, and due to the insurmountable defects of mechanical wear, the inductive energy meter is slower and slower, and the final error is getting larger. The State Grid has conducted spot checks on inductive meters, and found that more than 50% of inductive meters have exceeded the allowable range after 5 years of use.
3) Overload, power frequency range. The overload multiple of smart meters can generally reach 6 to 8 times, with a wider range. At present, 8 to 10 times magnification watches are becoming the choice of more and more users, and some can even reach a wide range of 20 times magnification. The operating frequency is also wide, ranging from 40 to 1000 Hz. The overload multiple of inductive meters is generally only 4 times, and the working frequency range is only 45 ~ 55Hz.
4) Function. Because of the use of electronic technology, smart meters can be networked with computers through related communication protocols, and control and management of hardware can be achieved through programming software. Therefore, smart meters not only have the characteristics of small size, but also have functions such as remote control, rate recovery, identification of malignant loads, anti-stealing electricity, and prepaid electricity consumption. Moreover, they can meet the control functions by modifying different parameters in the control software Different requirements, and these functions are difficult or impossible for traditional inductive meters.
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