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False data injection attack design and defense method for direct current microgrid

A DC microgrid, false data technology, applied in the direction of load balancing in DC network, parallel operation of DC power supply, electrical components, etc.

Active Publication Date: 2019-12-13
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO +2
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  • Abstract
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  • Application Information

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Problems solved by technology

But in actual situations, attackers may learn some key parameters by lurking in the system, and launch coordinated attacks at specific moments, resulting in precise and targeted strike effects, such as the Stuxnet incident at the Iranian nuclear power plant

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  • False data injection attack design and defense method for direct current microgrid
  • False data injection attack design and defense method for direct current microgrid
  • False data injection attack design and defense method for direct current microgrid

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0064] The content of the present invention can be divided into two parts, the first part is to design a new FDIA, and the second part is to propose a corresponding defense method for the designed FDIA.

[0065] Such as figure 1 As shown, in order to analyze the potential hidden FDIA in the DC microgrid, the new energy power generation unit is simplified as a DC voltage source, and a resistor-inductance-capacitor filter supplies power to the current-type load. The dynamic model of power generation unit i is as follows:

[0066]

[0067] Where A ii ∈R 3×3 Is the circuit parameter, b i ∈R 3×1 , G i ∈R 3×1 Is the input parameter, M i ∈R 3×3 Is the line coupling parameter, C i ∈R 3×3 Is the output parameter, x i (t)∈R 3×1 Is the system state (current and voltage), d i (t)∈R 2×1 Is external disturbance, ξ i (t)∈R 3×1 Is the physical coupling between...

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Abstract

The invention discloses a false data injection attack design and defense method for a direct current microgrid. For a network communication message in the secondary control layer of the direct currentmicrogrid, malicious false data are injected. At the same time, considering the initial state estimation bias and measurement noise existing in the original detection process, a covert data injectionattack method is designed to cause disturbance to current / voltage without affecting the existing attack detection indicators. The covert data injection attack acquired through analysis affects the average voltage value of coupling points in the direct current microgrid. A proportional-integral dynamic average consistency algorithm is used to estimate the average voltage value of the coupling points in the direct current microgrid. The covert data injection attack is detected based on the average voltage deviation of the coupling points. Finally, a proportional-integral compensation mechanismis used to compensate the average voltage deviation of the coupling points. The secondary control input is adjusted. Voltage balance in the direct current microgrid is re-established.

Description

Technical field [0001] The invention relates to the field of power information security of industrial control systems, in particular to a design and defense method for false data injection attacks against secondary control networks in DC microgrids Background technique [0002] In recent years, with global warming and the massive consumption of fossil energy, distributed new energy power generation units have emerged, such as photovoltaic power generation units and wind power generation units. The power generation of new energy power generation units will fluctuate with weather conditions, so if they are directly injected into the grid, they will cause non-negligible disturbances. As a new type of aggregation structure on the distribution side, microgrid is generally composed of new energy power generation units, energy storage equipment and flexible loads, which can well absorb the uncertainty of new energy power generation. The microgrid itself is extremely flexible. Under nor...

Claims

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Application Information

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IPC IPC(8): H02J1/10H02J1/14H04L29/06
CPCH02J1/10H02J1/14H04L63/1466
Inventor 刘孟祥程鹏潘骏陈积明欧阳柳姚一杨陈嵘王文华方景辉唐锦江赵志军徐晨金军
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD JIAXING POWER SUPPLY CO
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