A multi-stage dynamic game defense method for cascading failures

A dynamic game, cascading failure technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as failure to cover expected failures, inability to accurately assess the effectiveness of control measures, and failure to consider the cost of control measures.

CN104268410BInactive Publication Date: 2017-02-08HEFEI UNIV OF TECH +3
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-02-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a cascading failure multi-stage dynamic game defense method applied to a power system. The method is characterized by comprising the following steps: firstly setting the total stage number of a game process and initial values of stages of a failure party and a defense party; then generating a deterministic strategy set and a risky strategy set by calculating the probability, the consequence and the risk factor of each action adopted at the stage of a bounded rationality failure party in sequence; stipulating a strategy selection sequence of the bounded rationality failure party; judging whether line overload or power angle instability is caused by the action adopted by the bounded rationality failure party, wherein direct current tide sensitivity-based overload control or extended equal area criterion-based stability control can be selectively adopted by a perfect rationality defense party according to a judgment result; judging whether an ending condition of the game process is met; finally calculating revenue functions of the bounded rationality failure party and the perfect rationality defense party; ending the multi-stage dynamic game defense process. According to the method, the blockage of cascading failure is realized, and power blackout accidents are prevented.
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Description

technical field

[0001] The invention relates to the field of cascading failure defense control of electric power system, more specifically, it uses game theory to construct a multi-stage dynamic game defense method for cascading failures. Background technique

[0002] In recent years, there have been many blackouts caused by cascading faults in domestic and foreign power systems, which have caused huge economic losses and catastrophic consequences. Although these accidents started from accidental initial faults, they need to go through an obvious chain tripping process when they develop into blackouts, during which there is enough time to implement control. For example, in the "8.14" blackout in the United States and Canada in 2003, within 62 minutes after the initial fault occurred, five lines were disconnected one after another. During this period, there were 22 minutes, 9 minutes, 5 minutes and 29 minutes for the dispatching department to take control measures. If the con...

Examples

Embodiment Construction

[0111] Cascading fault multi-stage dynamic game defense method in the present embodiment is to carry out according to the following steps:

[0112] Step 1. In the multi-stage dynamic game process of a cascading fault, it is stipulated that the faulty party takes action first, and the defending party takes action later, and the actions of both parties are carried out alternately; a combination of actions of the faulty party and the defending party is regarded as a stage, and D is defined as The total number of stages of the given game process, use d to indicate that the faulty party and the defensive party are in the dth stage, and the initial value of d is 1;

[0113] Step 2. According to the current operating conditions of the power system, calculate the probability that the bounded rational fault party takes various actions in the d-th stage and consequences And further calculate the risk coefficient of taking each action in the dth stage will probability Actions with...