Power grid CPS prevention control method based on anticipated accident scenes

Abstract

The invention provides a power grid CPS prevention control method based on anticipated accident scenes. The power grid CPS prevention control method relates to the technical field of power system automation. The power grid CPS prevention control method comprises the steps of: firstly, constructing an initial accident scene model, and acquiring an optimized anticipated accident scene set based on feature similarity; secondly, comprehensively analyzing and calculating a benefit function according to an economic loss index, a heavy-load consequence severity index, a voltage offset severity index,a frequency offset severity index and a communication interruption severity index of loads of a power grid respectively; thirdly, acquiring a power flow transfer control strategy, a voltage instability adjustment strategy, a node removal strategy and a communication reliable adjustment strategy based on sensitivity; and further constructing a solution model, and adopting a relaxation method to perform a finite number of iterations to obtain a hybrid prevention control measure. The power grid CPS prevention control method based on the anticipated accident scene provided by the invention obtains the power grid hybrid prevention control method for different anticipated accident scenes, realizes 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

Images