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A Method of Calculating the Resilience of Power Network After a Major 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: 2018-05-25
STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Method of Calculating the Resilience of Power Network After a Major Blackout
  • A Method of Calculating the Resilience of Power Network After a Major Blackout
  • A Method of Calculating the Resilience of Power Network After a Major Blackout

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the drawings:

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

[0042] (1) Diagnose the availability of all power generation and transmission equipment in the system, obtain the number of black-started units and units to be restored in the system and their corresponding unit capacity, the connection relationship of available transmission lines in the system and their corresponding line parameters ;

[0043] (2) Based on the acquired data, establish a weighted network connection matrix corresponding to the system;

[0044] When the weighted network connection matrix M corresponding to the system is established, M is a square matrix, and the number of rows and columns are equal to the number of stations available in the system. When there is an available link l between node i and node j in the system ij 时,and lin...

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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 method for calculating power grid indicators, in particular to a method for calculating the resilience of the power grid after a blackout. Background technique [0002] With the rapid economic and social development, the scale of the power system is getting larger and larger, and with the construction of UHV AC and DC power grids and large-scale wind farms and photovoltaic power stations connected to the grid, the dynamic behavior of the power system It is becoming 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 and closer to its safety limit, which greatly increases the complexity of the operation and maintenance of the power grid. Therefore, improper handling of local faults in the system may cause a large-scale power outage in the system. For example, on August 14, 2003, the most serious power outa...

Claims

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Application Information

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Patent Type & Authority Patents(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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