Smart electric meter

Abstract

The application discloses a smart electric meter comprising a meter for measuring an electric quantity, a communication module for transmitting data, a main controller connected to the communication module, and a security module connected with the main controller and the meter respectively. The main controller is used for receiving data transmitted by a main station through the communication module, determining whether the data are metering sensitive data, if so, forwarding the data to the security module, and if not, performing a corresponding operation based on the data. The security moduleis used for carrying out a corresponding security operation on a metering value of the meter based on the metering sensitive data. According to the application, the metering sensitive data are processed directly by the security module; the security connected with the meter directly is able to carry out the security operation on the metering value of the meter directly; and thus the processing of the metering value is done by the security module with high security instead of the main controller, so that a risk of malicious tampering of the main controller during processing is eliminated. Therefore, the security of the electric meter is improved and the interests of the user are protected well.

Description

technical field [0001] The present application relates to the technical field of automated electronic products, in particular to a smart electric meter. Background technique [0002] The smart meter is the terminal of the smart grid. In addition to the basic power consumption measurement function of the traditional meter, it also has a variety of intelligent functions such as two-way multi-rate metering, user-side control, and anti-theft electricity. [0003] The structure of a common smart meter is as follows figure 1 As shown, including main controller, communication module, meter, safety module, display and controllable switch. The main controller performs corresponding operations under the control of the main station, such as reading the measurement value of the meter, controlling the controllable switch to close to realize power failure, etc., and the security module provides encryption for the main controller during the corresponding operation. Or decryption and othe...

AI Technical Summary

Problems solved by technology

However, the smart meter with this structure still has a relatively large risk. When hackers maliciously attack and control the main controller, the security module cannot find that the data sent by the main controller is fake data, and cannot play a role in protecting data security. For example , after the main controller obtains the measurement value, the hacker tampers with the data and sends it to the security module for encryption and other security processing, and finally the main controller sends it to the main station through the communication module. It can be seen that in the whole process of data processing, The security module does not play a role in protecting the authenticity of the data, and the master station cannot find that the data has been tampered with during processing by the master controller; The security module verifies the validity of the command. The main controller will execute the power-off command after the command verification is passed. When the main controller is maliciously controlled, the main controller can skip the verification link and directly send a power-off signal to the controllable switch. , resulting in a malicious power-off situation

It can be seen that the security of the current smart meters is low, and the interests of users are easily violated.

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