Twin-core watt-hour meter data exchange validity determining method and system, and twin-core watt-hour meter

Abstract

The invention provides a twin-core watt-hour meter data exchange validity determining method. A twin-core watt-hour meter comprises a management part and a legal measurement part. The method comprises the following steps: the legal measurement part generates a random number R after receiving a communication request sent by a client or a principal computer via the management part, and sends the random number R to the client or the principal computer via the management part; the legal measurement part acquires target data T and calibration data C1 sent by the client or the principal computer, the legal measurement part uses a pre-stored key A to encrypt the random number R according to a pre-stored encryption algorithm to get a temporary key B, and the legal measurement part uses the temporary key B to perform computation on the target data T according to the pre-stored encryption algorithm to get calibration data C2; the legal measurement part judges whether the generated calibration data C2 and the received calibration data C1 are consistent through comparison, the target data is valid if the calibration data C2 and the calibration data C1 are consistent, and the target data is invalid if the calibration data C2 and the calibration data C1 are not consistent.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to a method and system for determining the data exchange validity of a double-core electric energy meter and a double-core electric energy meter. Background technique [0002] At present, my country's electric energy meter is designed in one piece, that is, the legal measurement part and the illegal measurement part do not require independent work. This kind of energy meter has relatively solid requirements for software and hardware. Once a hardware or software failure occurs, the only way to replace the entire meter is to ensure the smooth progress of power metering. And for the safety consideration of preventing tampering with the energy meter program, the online upgrade of the energy meter software is not allowed. In the future competitive electricity market, out of the consideration of maximizing the interests of different electricity selling entities, the multi-...

AI Technical Summary

Problems solved by technology

[0004] At present, the electric energy meter in our country uses the embedded ESAM module to realize the data exchange between the electric energy meter and the client computer, which can only solve the data security problem between the client computer and the electric energy meter

The "dual-core" electric energy meter includes a legal measurement part and a management part, and the existing technology cannot solve the security of data exchange between the legal measurement part and the management part of the "dual-core" electric energy meter.

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