A directional collaborative network attack protection method for substation automation systems based on differential management of global synchronous clocks
A technology for substation automation and synchronizing clocks, applied in time-division multiplexing systems, transmission systems, electrical components, etc., can solve problems such as user and load loss, threats to power grid security, etc., to ensure operational safety and improve information security. Active protection effect of ability
Active Publication Date: 2020-01-03
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
Although a single substation out of operation will cause a certain loss of users and loads, it does not necessarily threaten the security of the grid
Method used
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Embodiment 1
[0023] suppose figure 2 There are 10 substations in the power grid, and the global synchronization clocks in the stations (in the substations) have not been adjusted, that is, the synchronization time in each substation is the same, then when all 10 substations are invaded by targeted attack malware, they will launch at the same time The tripping attack caused all the lines in the 10 substations to trip, causing a major blackout. According to this method, the global synchronous clocks of each substation are increased one by one and adjusted to be ahead of one day, then the global synchronous time of the global synchronous clocks of each substation is changed accordingly, and the date and days displayed by the global synchronous clock of substation 1 are advanced by one day ( For example, from May 10, 2017 to May 11, 2017), and the date changes of the global synchronous time of the global synchronous clocks of other substations see figure 2 . Since the date of the global sy...
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The invention provides a directional cooperative network attack protection method for a substation automatic system based on world-wide synchronous clock differentiated management. For the problem that after malicious software directionally attacking substations intrudes into the substation automatic system, accurate control information of each circuit breaker of the substations is obtained through a substation description file and then the circuit breakers are controlled to be tripped off, the differentiated management is carried out on a world-wide synchronous clock of each substation. Specifically, a synchronous clock time adjustment module is increased in the world-wide synchronous clock of each substation; after time adjustment is carried out, the world-wide synchronous time of the world-wide synchronous clock of each substation is different; and the intra-substation synchronous time of each substation is modified through intra-substation time service, so a big power failure that a plurality of substations are powered off at the same time resulting from the fact that the malicious software intruding the plurality of substations carries out cooperation through the world-wide synchronous clocks and synchronously initiates trip-off attacks is avoided, the operation safety of a power grid in an extreme condition is ensured, and the information security active protection capability of the substation automatic system can be clearly improved.
Description
technical field [0001] The invention relates to an information security protection method for a substation automation system, in particular to a directional collaborative network attack protection method for a substation automation system based on differential management of global synchronous clocks. Background technique [0002] As a critical infrastructure of modern society, power systems are high-value targets for cyber attacks. In the process of digitalization and network development of the power system, the power system has gradually developed into a hybrid system composed of information systems and physical grids. Among them, the production scheduling and protection control of the power grid are highly dependent on the information system, and the possible consequences of information security incidents have increased significantly. Countries around the world have set up cyber forces to specialize in cyber attack and defense research in fields such as electric power. ...
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IPC IPC(8): H04L29/06H04J3/06
CPCH04J3/0638H04L63/145
Inventor 苏盛李田谢峰滕明星曾祥君王冬青罗昊
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY