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Power distribution network fault recovery method based on real-time contingency sets

A technology for predicting accident sets and distribution network faults, applied to electrical components, circuit devices, AC network circuits, etc., can solve the problems of accident probability deviation and inability to accurately reflect system operation risks, so as to shorten calculation time and reduce The effect of the expected number of accidents

Active Publication Date: 2014-07-23
STATE GRID LIAONING ELECTRIC POWER CO LTD SHENYANG POWER +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

During the disaster period, the probability of accidents deviates from its long-term statistical value, and still using the expected accident set under the general meteorological environment to participate in the evaluation can no longer accurately reflect the operational risk of the system

Method used

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  • Power distribution network fault recovery method based on real-time contingency sets
  • Power distribution network fault recovery method based on real-time contingency sets
  • Power distribution network fault recovery method based on real-time contingency sets

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Embodiment Construction

[0050] The technical solution of the present application will be described in further detail below in conjunction with the accompanying drawings and specific examples.

[0051] as attached figure 1 Shown is the flow chart of the distribution network fault recovery method based on the real-time predicted accident set disclosed by the present invention. The distribution network fault recovery method based on real-time predicted accident set of the present invention comprises the following steps:

[0052] Step 1: Determine the expected accident severity index, and construct the objective function and constraints of fault recovery;

[0053] In the distribution network fault recovery method provided by the present invention, the expected accident severity index described in step 1, the objective function and constraint conditions of fault recovery are defined as follows:

[0054] The expected accident severity index is:

[0055] I φ ...

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Abstract

Disclosed is a power distribution network fault recovery method based on real-time contingency sets. The method includes the steps of determining a contingency severity index firstly, obtaining the expected value of influence of contingencies by combining the contingency severity index with the probability of occurrence of the contingencies, sorting the contingencies according to the severity levels according to the expected value of influence of the contingencies, screening out the contingency sets needing fault recovery analysis, updating the contingency sets within each time period, and outputting corresponding fault recovery schemes in real time. The real-time contingency sets are established, the contingencies with the small expected value of influence are omitted, only the fault recovery schemes of the contingencies with the high expected value of influence are analyzed, the number of the contingencies needing to be analyzed by on-line dynamic safety assessment is largely decreased, the calculation time for analysis of the fault recovery schemes is shortened, and real-time fault recovery plans are achieved before faults occur.

Description

[0001] Patent field [0002] The invention belongs to the technical field of electric power system automation, relates to the reconfiguration and transfer of distribution networks, and specifically relates to a distribution network fault recovery method that considers real-time predicted accident sets. Background technique [0003] With the development of modern power systems and the improvement of the reliability requirements for power supply, ensuring the normal power supply of urban distribution networks under disaster conditions is directly related to social stability and people's production and life. [0004] Traditional distribution network fault recovery is to collect data from the terminal after the fault occurs, and the system data uploaded by the terminal in real time before the fault is not effectively used; and the analysis of the fault recovery plan after the fault occurs will cause the extension of power outage time and the delay of repair time shorten. At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 王英男王增平李朝顺俞隽亚云辰太
Owner STATE GRID LIAONING ELECTRIC POWER CO LTD SHENYANG POWER
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