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Method for calculating recovery capability of power grid after blackout

A technology for power grid restoration and major power outages, applied in computing, electrical components, circuit devices, etc., can solve problems such as lack of quantitative analysis tools, and achieve objective results of calculation.

Active Publication Date: 2016-05-04
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At this stage, the research on power grid resilience has just started, and its evaluation theory and method research still needs further systematic results. The analysis of relevant factors is still in the qualitative analysis stage, and there is a lack of quantitative analysis tools.

Method used

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  • Method for calculating recovery capability of power grid after blackout
  • Method for calculating recovery capability of power grid after blackout
  • Method for calculating recovery capability of power grid after blackout

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Embodiment Construction

[0040] The present invention is described in detail below in conjunction with accompanying drawing:

[0041] A method to calculate the resilience of the power grid after a blackout, such as figure 1 shown, including the following steps:

[0042] (1) Conduct availability diagnosis on all power transmission and transformation equipment in the system, obtain the number of black-start units and units to be restored in the system and their corresponding unit capacities, the connection relationship of available transmission lines in the system and their corresponding line parameters ;

[0043] (2) Establish a weighted network connection matrix corresponding to the system according to the acquired data;

[0044] When establishing the weighted network connection matrix M corresponding to the system, M is a square matrix, and the number of rows and columns is equal to the number of sites available in the system. When there is an available connection line l between node i and node j ...

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Abstract

The invention discloses a method for calculating the recovery capability of a power grid after blackout. The method comprises the following steps: (1), identifying the specific state of a system after power failure, and obtaining data for calculating; (2), screening out available black-start machine sets in the system, and calculating the sum of capacities of all the black-start machine sets and the corresponding per-unit value; (3), calculating the average shortest distance from various machine sets to be recovered to the black-start machine sets and the average shortest distance from load nodes to various machine set nodes in the system, and calculating the average distance between the two; and (4), taking the per-unit value of the sum of the capacities of the black-start machine sets and the quotient of the average distance in the step (3) as the recovery capability of the power grid after blackout. The method disclosed by the invention has the benefits that: a quantitative means is provided for evaluating and analyzing the recovery capability of the power after blackout; the weak point of the power grid in the aspect of increasing the recovery capability is convenient to search; and the corresponding improved means is provided.

Description

technical field [0001] The invention relates to a calculation method of a power grid index, in particular to a calculation method for calculating the recovery force of a power grid after a major blackout. Background technique [0002] With the rapid development of the economy and society, the scale of the power system is getting larger and larger, and with the construction of UHV AC and DC grids and the connection of large-scale renewable energy bases such as large-scale wind farms and photovoltaic power stations to the grid, the dynamic behavior of the power system It has become increasingly complex, and environmental issues and economic factors must be considered during the operation of the power grid, making the operating point of the power grid closer to its safety limit point, which greatly increases the complexity of power grid operation and maintenance. Therefore, if the local failure of the system is not handled properly, it is very likely to cause a large-scale powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06Q50/06
CPCH02J3/00H02J2203/20
Inventor 朱海南马献丽杨文佳李建建邱韵如卜亚明王鑫田超黄健邱正美赵志军王林曹春刚黄海丽侯保刚晋飞
Owner STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY
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