Method for defending false-data injection attack in direct-current state estimation of electrical power system

A state estimation and power system technology, applied in the transmission system, digital transmission system, information technology support system, etc., can solve the problems of not considering the influence of the power system, bad data detection and identification, etc., and achieve the effect of improving accuracy

Active Publication Date: 2012-06-27
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] At present, most of the research on the security of power system state estimation data focuses on the detection and iden

Method used

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  • Method for defending false-data injection attack in direct-current state estimation of electrical power system
  • Method for defending false-data injection attack in direct-current state estimation of electrical power system
  • Method for defending false-data injection attack in direct-current state estimation of electrical power system

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Embodiment Construction

[0026] The present invention is described in further detail below in conjunction with accompanying drawing:

[0027] refer to figure 1 , the steps of the method for defending against false data injection attacks in power system DC state estimation designed by the present invention are as follows:

[0028] 1) Obtain system network parameters: Obtain system network parameters from the energy management system, including the branch number of the transmission line, the number of the first node and the last node, series resistance, series reactance, parallel conductance, parallel susceptance, etc.

[0029] 2) Acquisition system real-time measurement data: the data acquisition and monitoring control system collects the real-time measurement data z=(z of the system collected by the sensor every 2-4 seconds 1 ,z 2 ,...,z m ) T is sent to the state estimator in the energy management system, where z i ∈R(i=1, 2,..., m) represents the node voltage amplitude V i , Active power P inj...

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Abstract

The invention discloses a method for defending false-data injection attacks in the direct-current state estimation of an electrical power system, which belongs to the technical fields of electrical-power system safety and control and comprises the following steps of: estimating the real-time state of a direct-current system by a weighted least square method, and filtering measuring noise and random disturbance; processing a state-estimating result by a maximum standard residual-error detecting method, and detecting and identifying bad data in quantity measurement; and calculating the sensor quantity-measuring combination which is most easily destroyed by the false-data injection attacks by a heuristic algorithm, carrying out encryption protection for a group of sensors, and blocking the false-data injection attacks from occurring from a source. The method can be used for accurately and rapidly defending the false-data injection attacks in the state estimation of the electrical power system, and the state-estimating accuracy and safety of the electrical power system are improved.

Description

Technical field: [0001] The invention relates to a method for defending against false data injection attacks in power system DC state estimation, and belongs to the technical field of power system safety and control. Background technique: [0002] The power system is an important national infrastructure, and its safe and stable operation plays a key role in social stability and the normal development of the national economy. With the increasing complexity of power systems and the promotion of smart grids, in order to make them operate safely and stably, the real-time status of monitoring and control systems cannot be ignored. The energy management system in the control center estimates the real-time state of the system based on the received sensor measurement data, and makes real-time control decisions using the estimated results and control algorithms. [0003] In addition to normal measurement noise, the measurement data of power system state estimation also contains rand...

Claims

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Application Information

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IPC IPC(8): H02J3/00H04L9/00
CPCY04S40/24Y04S40/20
Inventor 杨清宇杨洁安豆
Owner XI AN JIAOTONG UNIV
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