Markov-chain-based power grid toughness evaluation method in consideration of time-space characteristic of influence of typhoon

A Markov chain and typhoon technology, applied in the direction of electrical digital data processing, special data processing applications, resources, etc.

Inactive Publication Date: 2018-09-14
STATE GRID TIANJIN ELECTRIC POWER +2
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Problems solved by technology

[0003] Aiming at the time-varying failure rate of components brought about by typhoon weather’s influence on the system’s space-time characteristics and the toughness evaluation problem in the whole process of typhoon weather’s influence on system components, the present invention provides a Markov chain-based grid resilience assessment method

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  • Markov-chain-based power grid toughness evaluation method in consideration of time-space characteristic of influence of typhoon

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Embodiment Construction

[0067] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples.

[0068] The present invention proposes a grid resilience evaluation method based on the Markov chain considering the temporal and spatial characteristics of typhoons, as follows: Figure 4 The shown IEEE33 node test system verifies the validity and correctness of the method proposed by the present invention. The X symbol in the figure shows the path of the typhoon. The typhoon passed through lines 2-19, 5-23, 26-27 and 6-7 in sequence.

[0069] Relevant algorithms in the power grid resilience assessment method are realized with the help of matlab programming, and the configuration of the computer is: Intel Core i3-2120 processor, 6G memory.

[0070] Considering the space-time characteristics of typhoons based on the Markov chain, the method for evaluating the power grid resilience of the IEEE33 nod...

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Abstract

The invention discloses a Markov-chain-based power grid toughness evaluation method in consideration of the time-space characteristic of the influence of a typhoon. The method comprises a step 1 of based on a traditional component fragility curve and in consideration of the time-space characteristic of the influence of typhoon weather on the power grid, calculating a time-varying failure rate in typhoon weather; a step 2 of determining the possible failure time of typhoon-affected components in the system and the corresponding failure probability according to the time-varying curve of the component failure rate by using a sampling method; a step 3 of based on the Markov chain and according to the possible failure time of each component and the corresponding failure probability, calculatingthe system state transition probability matrix corresponding to the possible failure time of each component so as to obtain the system state probability vector under each time period; and a step 4 ofaccording to the system state probability vector under each time period, evaluating the toughness levels of the possible states of the system in each time period, and applying a Monte Carlo method toevaluate the toughness level of the system.

Description

technical field [0001] The invention belongs to the field of power system analysis, and in particular relates to a grid resilience evaluation method. Background technique [0002] Under normal operating conditions, the power system needs to meet the corresponding safety and reliability criteria for the expected accident set. Modern power systems can generally meet the corresponding reliability indicators. However, when encountering extreme weather, the power system is extremely fragile. The reason is that the reliability of the power system generally focuses on accidents that occur frequently and have little impact on the power grid, while the probability of extreme weather is often very low, but the impact on the power grid is extremely serious. Resilience is currently used to measure the power system's ability to prepare for and adapt to changing conditions and its ability to withstand and recover quickly from disturbances. By evaluating the resilience of the power syst...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06F17/50G06Q50/06
CPCG06Q10/06393G06Q50/06G06F30/20
Inventor 王魁李媛媛刘建存秦超曾沅闫大威魏联斌李慧罗涛雷铮周进宣文博
Owner STATE GRID TIANJIN ELECTRIC POWER
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