Multifunctional power meter with dynamic intelligent identification of multiple devices and energy consumption splitting function

Abstract

The invention belongs to the field of power supply or power distribution circuit devices or circuit systems, and relates to a multifunctional electric power meter with functions of multi-device dynamic intelligent identification and energy consumption division. The idea that dynamic division is carried out from power distribution branch electricity consumption to electricity consumption of all branch subordinate electric devices in the electric power meter is provided, and an algorithm with the functions of the multi-device dynamic intelligent identification and the energy consumption division is provided. The algorithm includes the following steps that (1) alternating current signals of power distribution branches are collected, signals at N points are collected for each cycle, and data of two cycles are collected; (2) electric parameters of the power distribution branches are calculated, and the electric parameters comprise three-phase voltage, a three-phase current, three-phase power, three-phase power factors, total power and total power factors; (3) a first criterion of the multi-device intelligent identification is a rated active power discriminating method; (4) a second criterion of the multi-device intelligent identification is a rated power factor discriminating method; (5) a third criterion of the multi-device intelligent identification is a switching value discriminating method; (6) a fourth criterion of the multi-device intelligent identification is a current time and device work and rest time discriminating method; (7) a fifth criterion of the multi-device intelligent identification is an incremental current discriminating method; (8) the multi-device intelligent identification synthesizes the criterions; (9) the division is carried out from the power distribution branch electricity consumption to the electricity consumption of all the branch subordinate electric devices. An implement method of the multifunctional electric power meter with the functions of the multi-device dynamic intelligent identification and the energy consumption division is provided. Energy consumption division is directly carried out in the electric power meter, and not only are rated power and work and rest time of electric devices discriminated, but also more criterions can be added in, and therefore division accuracy is high. A background function of a subentry metering energy-saving system built through the method can be simplified greatly.

Description

(1) Technical field [0001] The invention belongs to the field of power systems and power distribution systems, and relates to a multifunctional power meter with the functions of multi-device intelligent identification and energy consumption splitting. (2) Background technology [0002] More and more power users use multi-function power meters to monitor the power distribution system in real time. At present, the functions of all multi-functional power meters are limited to collecting and calculating the distribution parameters of a distribution branch circuit (or a power consumption device) and controlling the distribution branch circuit. The functions include: [0003] a) Power distribution data collection and calculation: current, voltage, power, power factor, frequency, power energy, harmonics and power quality, etc. [0004] b) Signal monitoring: switch signal monitoring of power distribution branch [0005] c) Control: It can control the power on and off of the power ...

AI Technical Summary

Problems solved by technology

[0013] Due to the limitation of the large amount of metering equipment, communication transmission speed, and calculation speed, when the background system realizes the function of power consumption splitting, it usually can only calculate the power consumption of electric equipment according to the actual power consumption data, equipment rated power and equipment operation schedule. Estimated, there is a large error

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