A preventive control method for power grid cps based on anticipated accident scenarios

Abstract

The invention provides a power grid CPS preventive control method based on an expected accident scene, and relates to the technical field of power system automation. This method first constructs the initial accident scene model, and obtains the optimized expected accident scene set based on the feature similarity; Severity index and communication interruption severity index are comprehensively analyzed to calculate their benefit function; then based on the sensitivity, the power flow transfer control strategy, voltage instability adjustment strategy, node removal strategy and communication reliability adjustment strategy are obtained, and then the solution model is constructed, and the relaxation method is used to carry out A finite number of iterations results in mixed preventive controls. The power grid CPS preventive control method based on the anticipated accident scene provided by the present invention obtains the power grid hybrid preventive control method for different anticipated accident scenarios, realizes the active defense of the power grid, and ensures the safe operation of the power system.

Description

technical field [0001] The invention relates to the technical field of power system automation, in particular to a power grid CPS preventive control method based on an anticipated accident scene. Background technique [0002] With the continuous development of smart grid construction and energy Internet, the power network has become the largest and most complex man-made system in the world today. The interconnection of multi-level power grids, on the one hand, realizes the long-distance transmission of electric energy across regions, optimizes resource allocation, and achieves greater economic benefits. On the other hand, it puts forward new requirements and higher challenges for the stability of the power system. . In the future with the rapid development of science and technology, cyber physical system (CPS) will gradually occupy a dominant position in the power industry. The purpose of power grid CPS is to form a complex network with autonomous behavior through the real...

AI Technical Summary

Problems solved by technology

Although progress and achievements have been made, there are still deficiencies: (1) The existing power grid preventive control method only considers the historical data of the physical system, and what the statistical analysis obtains is a fixed, offline set of expected accident scenarios of the power grid. The method of accident scenarios does not meet the requirements of the spatio-temporal variation characteristics of the smart distribution network for the prevention and control of the power grid, and a large number of event alarm information in the system is mixed together, which is easy to be ignored; (2) the number of traditional expected accident scenarios is huge, it is necessary to The accident scene is optimized according to the possibility and uncertainty of the accident scene; (3) The power grid fault is analyzed in depth from the theoretical aspect, but the misoperation caused by the fraudulent data of the power grid is not considered, and the instability fault is not considered. Detailed analysis of prevention and control means, and a complete defense control strategy, there is still a certain gap from the actual application of defense control

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