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Power grid component cascading failure simulation method

A simulation method and cascading failure technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as slow calculation speed, inconvenience in dealing with uncertain events, etc. Effect

Inactive Publication Date: 2017-08-18
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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AI Technical Summary

Problems solved by technology

However, how to make up for the slow calculation speed of the simulation method and the inconvenient handling of uncertain events by the analytical method still needs further research.

Method used

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  • Power grid component cascading failure simulation method
  • Power grid component cascading failure simulation method
  • Power grid component cascading failure simulation method

Examples

Experimental program
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Embodiment Construction

[0030] Such as figure 1 As shown, a grid component cascading failure simulation method includes the following steps:

[0031] S1: Calculate the initial AC power flow according to the system data, and correct the failure rate of each line according to the voltage of each node and the power flow of the line. The system data includes the number of buses, the number of components, the total installed capacity and the maximum load. The components include Lines, generators, transformers and reactors.

[0032] In the actual operation of the power system, there are various reasons for component failures, which can be summarized as follows: (1) The component protection device operates when the component is not operating normally; (2) The component itself is faulty, such as manufacturing defects, components Aging, equipment heating, insulation damage, etc.; (3) External environment, such as lightning strikes, typhoons, blizzards, hail and other severe weather; (4) Human misoperations ...

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Abstract

The invention discloses a power grid component cascading failure simulation method. According to the invention, voltage and line active power flow, which have great influences for the failure rate of a component, are selected to act as variables to correct the failure rate of the component so as to enable the simulation to be closer to the reality; traditional methods such as proportional load shedding, nearby load shedding and load shedding performed according to the importance degree of loads are abandoned when load shedding is performed, an optimal load shedding method is adopted, and all factors, which can be used for adjustment, in the system are comprehensively utilized, so that a problem of load shedding is well solved theoretically so as to acquire an operation scheme capable of enabling the overall benefit of the system to be the highest; and the power grid component cascading failure simulation method not only considers an alternating-current mode, but also considers a direct-current mode in power flow calculation, so that both the calculation accuracy and the calculation speed are well considered.

Description

technical field [0001] The invention belongs to the field of power system simulation and calculation, and in particular relates to a method for simulating chain faults of grid components. Background technique [0002] In recent years, there have been many blackouts in the world, which have caused great economic losses and caused people to pay more attention to the safety of power grids. In the early spring of 2008, a historically rare ice and snow disaster occurred in southern China, causing 36,740 10kV and above power lines and 2,016 35kV and above substations to be out of service nationwide, and 10kV and above towers collapsed and damaged 310,321 foundations. Among them, the 110-500kV base caused more than 33.3 million households and about 110 million people to lose power, which had a very serious impact on the economy, society and people's lives. Many of these blackouts are caused by cascading faults, so it is extremely necessary to study them. [0003] The mechanism of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 孙志媛刘鹏孙艳刘默斯梁水莹李明珀丘浩李凌邓秋荃李一铭
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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