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Risk assessment method for power grid static voltage stability based on load uncertainty modeling

A technology of uncertainty and risk assessment, applied in data processing applications, instruments, calculations, etc., to solve problems such as inaccurate assessment results

Active Publication Date: 2019-11-29
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0003] In order to solve the problem of inaccurate assessment results of existing static voltage stability risk assessment methods, the present invention provides a grid static voltage stability risk assessment method based on load uncertainty modeling

Method used

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  • Risk assessment method for power grid static voltage stability based on load uncertainty modeling
  • Risk assessment method for power grid static voltage stability based on load uncertainty modeling
  • Risk assessment method for power grid static voltage stability based on load uncertainty modeling

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Embodiment Construction

[0079] A risk assessment method for power grid static voltage stability based on load uncertainty modeling, which is implemented by the following steps:

[0080] 1) Establish a load uncertainty model; the load uncertainty model includes: initial load fluctuation probability distribution model, node group identification model for load growth, and load random growth model;

[0081] 2) Establish a power flow calculation model: firstly, determine the node number of the load increase in the power grid according to the node group identification model where the load increases, and then collect the initial load consumption samples and load random load samples in the initial load fluctuation probability distribution model based on the Monte Carlo simulation method. Load incremental samples in the growth model, and finally based on the sample values, the continuous power flow calculation considering the comprehensive load characteristics is performed;

[0082] 3) Establish risk assessme...

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Abstract

The invention relates to a static voltage stability risk evaluation method of a power grid and particularly relates to a static voltage stability risk evaluation method of the power grid based on load uncertainty modeling, aiming at solving the problem of an existing static voltage stability risk evaluation method that an evaluation result is inaccurate. The static voltage stability risk evaluation method of the power grid based on the load uncertainty modeling is realized by the following steps: (1) establishing a load uncertainty model; (2) establishing a trend operation model; and (3) establishing a risk evaluation index, and recognizing a high-operation-risk region in the power grid by applying the risk evaluation index. The static voltage stability risk evaluation method of the power grid based on the load uncertainty modeling is applicable to static voltage stability risk evaluation of the power grid.

Description

technical field [0001] The invention relates to a static voltage stability risk assessment method for a power grid, in particular to a static voltage stability risk assessment method for a power grid based on load uncertainty modeling. Background technique [0002] In the actual operation of the power grid, voltage instability accidents caused by static voltage collapse will seriously affect the static and stable operation of the power grid, resulting in huge economic losses and seriously affecting national production. Therefore, in order to prevent the occurrence of voltage instability accidents, it is necessary to carry out risk assessment on the static voltage stability of the power grid. The existing static voltage stability risk assessment methods mainly include the following two types: the first is the deterministic assessment method, and the problem with this assessment method is that it cannot take into account the probability distribution of various uncertain factor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 韩肖清白杨王鹏秦文萍贾燕冰梁琛任春光王磊许进
Owner TAIYUAN UNIV OF TECH
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