Power terminal error data identification method based on evidence theory

Abstract

The invention specifically discloses a power terminal error data identification method based on an evidence theory. The method comprises the following steps: S1, acquiring multi-source data of a power terminal system; S2, fusing and comparing to judge whether the multi-source data in the power terminal system is consistent or not, if so, judging that the power terminal system does not have error data and opens a protection tripping outlet, and if not, judging that the power terminal system has error data and entering the step S3; S3, based on the multi-source data, generating evidence by using a protection algorithm; S4, judging whether error data exist in the power terminal system or not based on the generated evidence, if so, closing a protection tripping outlet and entering the step S5, otherwise, opening the protection tripping outlet; and S5, alarming error data in the power terminal system. According to the invention, error data in the power terminal system can be effectively distinguished under the condition that normal work is not influenced, possible incorrect protection actions are avoided, CPU resources are saved, and the protection sensitivity is high.

Description

technical field [0001] The invention relates to the technical field of power terminal systems, in particular to a method for identifying wrong data of power terminals based on evidence theory. Background technique [0002] A large number of terminal equipment and multiple users are connected to the power grid, gradually forming an open and interactive network environment, and the security protection of power terminals is facing unprecedented challenges. Traditionally, power grids mainly rely on boundary isolation and dedicated system private protocols to ensure network security. Generally, power terminals are developed based on general-purpose software and hardware platforms, except that smart terminals on the user side rely on the relatively simple SM1 cryptographic algorithm (SM1 cryptographic algorithm, which is managed by the State Cryptography A commercial cipher block standard symmetric algorithm compiled by the bureau) to ensure security, rarely consider network secur...

AI Technical Summary

Problems solved by technology

In addition, potential communication failures and network intrusions may also cause the protection to receive wrong data and cause misoperation

[0003] The existing methods for identifying wrong data of power terminals do not solve the problem of terminal misoperation. The existing methods of protecting terminals are only through the analysis of a single data. With the development of the power grid to information and intelligence, the network extends to At all levels of the power grid, a large amount of data can be obtained. If these rich data can be analyzed and utilized in real time, not only can obtain more abundant and accurate information than a single data, but also make it possible to quickly identify wrong data and prevent incorrect protection actions.

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