Operation control-oriented adaptive modular power grid security pre-warning evaluation method

Abstract

The invention discloses an operation control-oriented adaptive modular power grid security pre-warning evaluation method. The method comprises the following steps: building an AC / DC hybrid power grid stability evaluation index system and forming a security pre-warning evaluation module, and determining the initial module index composition based on a Delphi expert meeting mechanism and expert experience; getting an index evaluation result sequence of the stability evaluation index system and an evaluation result sequence of the security pre-warning evaluation module; acquiring the correlation between the module evaluation result sequence and all index calculation result sequences based on a gray correlation analysis method; if the indexes of which the correlation exceeds a threshold are different from the original indexes of the security pre-warning evaluation module in composition, selecting the high-correlation indexes to update the security pre-warning evaluation module; or, fusing the subjective weight and objective weight of each index in the security pre-warning evaluation module based on a minimum distance model to get a comprehensive weight, and finally, getting the comprehensive evaluation result of the security pre-warning evaluation module, and issuing power grid security pre-warning.

Description

technical field [0001] The invention belongs to the field of online operation safety evaluation of electric power systems, and more specifically relates to an operation regulation-oriented self-adaptive modularized power grid safety early warning evaluation method. Background technique [0002] With the rapid development of UHV AC-DC hybrid power grid, the form and characteristics of the power grid are facing profound changes. On the one hand, the electrical connection of the whole network is getting closer, the coupling relationship between sections is more complicated, the safety and stability levels are mutually restricted, and the power grid structure and power flow mode have changed greatly. , there are many factors to be considered in issues such as supply and demand and security, and higher requirements are put forward for the lean and integrated level of power grid system analysis, early warning and operation control; on the other hand, the technical level and complex...

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Problems solved by technology

[0006] Aiming at the above defects of the prior art, the present invention provides an adaptive modular power grid safety early warning evaluation method oriented to operation regulation, aiming at solving the problems in the prior art that the evaluation system only considers unilateral factors and the evaluation method is subject to subjective influence. As well as the lack of interaction with the dispatching system, the existing evaluation methods cannot effectively reflect the technical problems of power grid operation risks under complex operating conditions

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