Electronic electricity meter with integrated digital-certification mechanism for secure communication

摘要

Electronic electricity meter with integrated digital-certification mechanism for secure communication, comprising current sensors, voltage sensors, electronic circuit for conditioning the current signals and voltage signals in the electrical levels required by the processing unit, processing unit able to continuously sample the current signals and voltage signals provided by the circuit and that reflect, using a known ratio, the real value of the current and voltage delivered to the meter connection terminals, the processing unit calculates the active and passive through energy and determines the energy values to be counted, and a communication unit, linked to the processing unit, which uses a digital data protocol and a physical interface to communicate with the world outside the meter, and a processing unit with digital certification functions located between the processing unit and the communication unit.

主权项

1. An electric energy measuring device with an integrated digital-certification mechanism for safe communication, the measuring device comprising:
current sensors; voltage sensors; an electronic circuit that conditions current and voltage signals; a current and voltage signal processor that enables continuous sampling of current and voltage signals of the electronic circuit, wherein a real value of current and voltage delivered at connecting terminals of the measuring device is reflected, wherein the current and voltage signal processor calculates passing active and reactive energy and determines energy values to be counted; a communication interface associated with the current and voltage signal processor that communicates using a data protocol and a physical interface; and a digital certification processor that is positioned between the current and voltage signal processor and the communication interface, wherein the digital certification processor encrypts and signs data of energy values using the data protocol of the communication interface and encryption keys of stored digital certificates; wherein a digital certification technique of the digital certification processor is native and non-separable; wherein the digital certificates contain information about a manufacturer, model, user, name of requesting electrical energy distributing company, and a period of validity of a certification related to a Technical Model Approval; and wherein determination of validity of the measuring device comprises verifying the information about manufacturer and model in the digital certificates with regulation requirements.