Single-phase smart meter based on impedance identification technology

Abstract

The invention discloses a single-phase smart meter based on the impedance identification technology. The single-phase smart meter can accurately detect the relationship of voltage, current and phase of a monitored point through a voltage transformer and a current transformer, and transmits the relationship to a high-speed electric energy information processor CS5463 to be processed; the processeddata such as voltage, current, phase and the like is transmitted to a central processor through an inside SPI (Single Program Initiation) bus for further measurement so as to further obtain information such as apparent power, active power, reactive power, active electricity, power factor and the like; and the specific impedances of all electric equipments are further measured in the current electricity using state according to the impedance identification algorithm provided by the invention, and compared with an impedance value pre-stored in an EEPROM (Electrically Erasable Programmable Read-Only Memory) of the smart meter so as to obtain the specific type and model of the electric equipment in the current electricity using state. The single-phase smart meter has extremely wide application range, can guide users to change unscientific electricity utilizing habit and further improve the economic benefit of users.

Description

Technical field: [0001] The invention belongs to the technical field of applied electronic products. The design is based on a brand-new impedance identification technology, which can be used for constant and accurate real-time collection and monitoring of the electric energy information of each main electric equipment in a building. Background technique: [0002] In recent years, with the improvement of smart grid construction, the reorganization of user power information collection system has become one of the important tasks. In order to follow the progress of smart grid construction and meet the environmental protection concept of energy saving and emission reduction and building green buildings, the power information collection system has entered the era of smart meters. [0003] When designing a smart meter, several physical quantities need to be dealt with: apparent power (S), active power (P), and power factor (λ). The relationship between them is: [0004] [000...

AI Technical Summary

Problems solved by technology

[0012] However, in the process of carrying out a large number of experimental verifications, we found that there is still a shortcoming in this method: in the process of calculating and processing the changes in power factor and current, the fact that the voltage may also change is ignored

A small change in voltage may affect the accuracy of the measured power factor and current, making it impossible to achieve accurate and stable measurement of power consumption information for specific electrical equipment

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