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Cascading failure set construction method capable of combining weighting power flow entropy with whole-process simulation

A technology of cascading faults and construction methods, applied in the field of power systems, can solve the problems of difficulty in ensuring the coverage of fault sets, and inability to specifically screen fault forms.

Active Publication Date: 2019-03-08
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0003] At present, the construction methods of cascading fault sets mainly include two types of methods: one is based on time-domain simulation analysis, but it relies on manual experience to set a large number of faults, and it is difficult to guarante

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  • Cascading failure set construction method capable of combining weighting power flow entropy with whole-process simulation
  • Cascading failure set construction method capable of combining weighting power flow entropy with whole-process simulation
  • Cascading failure set construction method capable of combining weighting power flow entropy with whole-process simulation

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0022] A cascading fault set construction method combining weighted power flow entropy and whole process simulation, such as figure 1 shown, including the following steps:

[0023] Step A: Establish the whole process simulation data including the medium and long-term dynamic model under the typical operation mode of the power grid in the research area;

[0024] Step B: Calculate the weighted power flow entropy of the power grid under the typical operation mode of the power grid. If the weighted power flow entropy reaches or exceeds the first threshold value, jump to step G. If the weighted power flow entropy does not reach the first threshold value, go to the next step, step B By...

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Abstract

The invention provides a cascading failure set construction method capable of combining weighting power flow entropy with whole-process simulation. The method comprises the following steps that: A: establishing simulation data; B: calculating weighting power flow entropy; C: monitoring exciting current; D: judging whether the exciting current is out of limit or not; E: calculating key branches ina power grid to form a key branch set; F: calculating power flow after any branch in the key branch set is cut off; G: arranging cascading failure sequences to form a cascading failure set; and H: starting a whole-process dynamic simulation program, calculating the cascading failure set formed in G one by one, if the cascading failure happens, causing a power grid to lose stability, finishing simulation, and if a situation that power grid instability is caused by the cascading failure does not happen, jumping to D. By use of the cascading failure set construction method capable of combining the weighting power flow entropy with the whole-process simulation, the coverage range of the fault set can be guaranteed, and fault forms can be specifically screened.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a cascading fault set construction method combining weighted power flow entropy and whole process simulation. Background technique [0002] In recent years, many large-scale power outages caused by cascading faults have occurred at home and abroad, and the research on the mechanism of cascading faults has gradually become an important issue that has attracted widespread attention in the field of power systems. In-depth research on the propagation and development mechanism of cascading faults in the power system is of great significance for power grid planning, power grid operation decision-making, and accident handling. Through the analysis of the common characteristics of many major blackouts at home and abroad in recent years, the large-scale power flow transfer in the system caused by one (or multiple) line faults makes other lines on the parallel transmission channel ov...

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 唐晓骏刘建勋霍启迪吉平余秀月陆颖铨谢岩李可文刘余李晓珺陈萌李陆
Owner CHINA ELECTRIC POWER RES INST
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