Method for improving elasticity of power system in extreme weather

Abstract

The invention relates to a power transmission and transformation safety technology of a power system, in particular to a method for improving elasticity of the power system in extreme weather. The method comprises the following steps: establishing an elastic coupling matrix; abstracting a physical layer and a communication layer of the power system, and introducing a transition matrix to form a three-layer elastic coupling matrix of a physical network, a transition network and a communication network; establishing an elastic framework based on Markov decision; designing a mathematical function of each link of Markov decision according to the elastic coupling matrix; establishing an analysis model considering extreme weather attacks; when the extreme weather attack is simulated for one time, enabling a dispatcher to obtain the minimum load shedding loss according to the target function, taking the single simulation result as output, taking the power system network parameters as input, and achieving multiple times of extreme weather simulation in multiple networks after analysis model training. The method has the characteristics of small investment, high precision, strong real-time performance and the like. And a dispatcher can conveniently take measures such as maintenance and the like on all equipment in the network after extreme weather.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation safety in power systems, and in particular relates to a method for elastically improving power systems in extreme weather. Background technique [0002] As an important critical infrastructure, the power system will have a huge impact on society once a power transmission and transformation safety accident occurs in extreme weather. Therefore, people pay more and more attention to the safety of power transmission and distribution in power systems. It has become a consensus that the potential risks and expected losses of long-term and large-scale power transmission and transformation accidents caused by extreme weather cannot be ignored. [0003] Different from conventional weather such as windy, rainy, dry and other conventional equipment failures such as windy, rainy, dry and unstable no-load voltage, tripping of transmission lines, busbar flashover removal, etc., ext...

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Problems solved by technology

[0004]Currently, methods of strengthening the power system before extreme weather occur, such as building a separation wall, dividing areas, etc., require a lot of manpower and material resources, and even some methods It will cause negative effects: burying lines in the ground to resist typhoons is not conducive to the development of subsequent maintenance; when extreme weather occurs, the faulty equipment is determined according to the network topology, power flow constraints, and power balance of the power system, but detailed parameter conditions of the power network are required , and ignore the impact of communication quality, generator output, etc. on the power grid; after the occurrence of extreme weather, we usually receive feedback from the inspection team or users to understand and grasp the location of the fault area, and carry out maintenance. replacement, delaying the user's waiting period

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