Power grid cascading fault modeling simulation method based on coloring random Petri network

A technology of cascading failures and simulation methods, applied in electrical digital data processing, instruments, calculations, etc., can solve the problems of model state space explosion, difficulty in revealing the overall behavior of the system, etc., and achieve the effect of reducing the number of nodes and making the system structure clear and clear.

Active Publication Date: 2019-08-30
NANJING UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the analysis of cascading failures based on traditional methods still has the following problems to be solved: (1) The scale of the actual power grid is very large. Through the traditional cascading failure modeling and analysis method, the number of model nodes is very...

Method used

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  • Power grid cascading fault modeling simulation method based on coloring random Petri network
  • Power grid cascading fault modeling simulation method based on coloring random Petri network
  • Power grid cascading fault modeling simulation method based on coloring random Petri network

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Experimental program
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Embodiment Construction

[0017] This embodiment takes figure 2 Take the three-machine nine-node system as an example, the steps are as follows:

[0018] Step 1: According to the wiring diagram of the power grid system, determine the corresponding actions of the relevant relay protection devices and circuit breakers when each component fails, and the actions include tripping, malfunction and refusal.

[0019] First determine the components contained in the system, protection and circuit breaker information. exist figure 2 Middle G i Indicates generator, L i Indicates the line, T i Indicates the transformer, A i Indicates the busbar, Load i Indicates the load, CB i Indicates the circuit breaker that the element is equipped with. The system includes 21 elements, 21 circuit breakers and 57 protections. Among them, the 21 components are: Generator G 1 ,...G 3 ;Bus A 1 ,...,A 9 ;Transformer T 1 ,...,T 3 ;Line L 1 ,...,L 6 . The 21 circuit breakers are: CB 1 ,CB 2 ...,CB 21 . Among th...

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Abstract

The invention provides a power grid cascading fault modeling simulation method based on a coloring random Petri network, which comprises the following steps of 1, determining the corresponding actionsof the related relay protection devices when each element has a fault according to a power grid system wiring diagram; 2, according to the property of the colored Petri network, classifying the relayprotection devices of all levels of the elements, and establishing a local CPN model for removing faults; 3, integrating the local CPN models of the element removal faults into a CPN model of a faultremoval route of the whole system; and 4, considering that the relay protection device may have a fault, and establishing an SCPN model of the whole system by using the random Petri network.

Description

technical field [0001] The invention relates to a power system fault detection and protection simulation technology, in particular to a power grid cascading fault modeling and simulation method based on colored stochastic Petri nets. Background technique [0002] The relay protection device is an important equipment to ensure the safe and stable operation of the power system. If there are hidden faults that cannot be found under normal operation, when the system fails, the malfunction of the relay protection device may further expand the impact of the accident and cause Cascading failures. According to the data, about 75% of the major blackouts are related to the incorrect action of the relay protection device. Therefore, the failure of the relay protection device is an important factor that causes the cascading failure of the power system and causes the system catastrophe. [0003] At present, the research on cascading failure prediction can be roughly divided into two maj...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/00
Inventor 邢佳莉孔建寿胡雅倩
Owner NANJING UNIV OF SCI & TECH
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