Wide area measurement system (WAMS) phasor measurement unit (PMU) optimization configuration method taking information security constraint into consideration

Abstract

The invention discloses a wide-area measurement system (WAMS) phasor measurement unit (PMU) optimization configuration method taking an information security constraint into consideration. Through reasonable optimization configuration of PMU equipment in a WAMS, under the condition that system observability is guaranteed, in case of information attack, calculation result deviations of state estimation can be limited within a set threshold. According to the method, when system security is considered, in case of the possibility that attackers may consider lunching information tempering attacks at power system network vulnerable nodes or nodes most severely affected by the attacks, it is ensured that the state estimation deviations of the system can also be controlled within a preset acceptable scope even if the system faces the most extreme information tampering attack site selection. The method provided by the invention, under the condition that the system observability is guaranteed, can reduce the state estimation deviations when the system encounters similar malicious information tampering attacks, enables the deviations to be controlled within the preset acceptable scope and realizes the purpose of maintaining security of a power information physical system.

Description

technical field [0001] The invention relates to a smart grid and a wide-area measurement system, in particular to a PMU optimal configuration method for a wide-area measurement system considering information security constraints. Background technique [0002] With the increase in the scale of electricity consumption and the access to new energy generation, information technology is being widely used in traditional power systems to form a huge and complex new system, namely the Electrical Cyber ​​Physical System (ECPS). While it brings many conveniences to the traditional power industry, it also brings many potential safety hazards. Among them, WAMS (WideAreaMeasurementSystem) is a system based on synchrophasor measurement technology and modern communication technology, which monitors and analyzes the operation status of the power system in a wide area, and serves the real-time operation and control of the power system. Its core measurement unit It is PMU (Phasor Measurement...

AI Technical Summary

Problems solved by technology

However, since the PMU-based state estimation relies heavily on the communication network to ensure its timeliness and accuracy, information attacks will reduce the accuracy of the system state estimation, and even make the system not fully observable.

Such inaccurate state estimation can directly cause misoperation of network behavior (such as corrective control, rapid decision-making), resulting in power system failure or even interruption

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