H infty load frequency control method based on buffer type event triggering scheme for power system under spoofing attack

A spoofing attack, event-triggered technology, applied in information technology support systems, circuit devices, AC network circuits, etc., can solve problems such as network attacks that have not been well studied

Active Publication Date: 2019-04-19
NANJING NORMAL UNIVERSITY
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Problems solved by technology

However, the cyber attack problem of LFC in power system has not been well studied at present.

Method used

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  • H infty load frequency control method based on buffer type event triggering scheme for power system under spoofing attack
  • H infty load frequency control method based on buffer type event triggering scheme for power system under spoofing attack
  • H infty load frequency control method based on buffer type event triggering scheme for power system under spoofing attack

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Embodiment Construction

[0062] Below in conjunction with accompanying drawing, technical scheme of the present invention will be further described:

[0063] The present invention provides an H∞ load frequency control method based on a buffer-type event trigger scheme in a power system under a deception attack, such as figure 1 As shown, it specifically includes the following steps:

[0064] S1. Analyze the load frequency control problem of the secondary frequency conversion and primary frequency conversion of the power system with the participation of electric vehicles, and establish the state equation of the dynamic model. The state equation is as follows:

[0065]

[0066] Among them, x(t) is the state variable, x(t)=[f(t) X g (t)P g (t)P e (t) Δ(t)] T , y(t) is the measurement output, y(t)=[f(t) Δ(t)] T , f(t) represents the frequency deviation, X g (t) indicates the position of the speed control valve, P g (t) represents the turbine output power, P e (t) represents the incremental chan...

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Abstract

The invention provides an H infty load frequency control method based on a buffer type event triggering scheme for a power system under spoofing attack. The H infty load frequency control method includes the steps: S1, analyzing a load frequency control problem of a power system secondary frequency conversion and primary frequency conversion involving an electric vehicle, and establishing a stateequation of a system model; S2, designing a buffer type event triggering mechanism, establishing a controller under a delay condition, and establishing a network system model state equation of the presence controller according to S1; S3, designing the conditions of occurrence of the spoofing attack, and establishing a state equation of the network control system model according to S2; and S4, calculating the sufficient condition for near-stability of mean square for the network control system in S3, and implementing system load frequency control. In the same network environment and under the same spoofing attack, compared with a traditional method, the H infty load frequency control method based on a buffer type event triggering scheme for a power system under spoofing attack can help thesystem resist stronger spoofing attack, has the advantages of low overshoot and short stable time, and can obtain better control effect.

Description

technical field [0001] The invention relates to a load frequency control method of a power system based on a novel event trigger mechanism, and belongs to the technical field of power network system control. Background technique [0002] The current power system is a typical network control system, in which sensors, power plants, and control centers are connected through a wide range of communication facilities. In order to suppress the power frequency instability caused by load fluctuations, load frequency control (LFC) has been widely used. Apply effectively. Recently, with the rapid development of electric vehicles (EVs) technology, electric vehicles have become the first choice for many consumers to replace fuel vehicles. Therefore, load frequency control assisted by electric vehicles has attracted a lot of research by scholars. By designing a suitable feedback controller, LFC can keep the frequency of the system at a desired value with the assistance of electric vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20Y04S20/222
Inventor 韦琳楠王昆玉田恩刚张金龙王檑周畅
Owner NANJING NORMAL UNIVERSITY
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