Prevention and control method of online risk assessment based on wind power fluctuation

A preventive control and risk assessment technology, applied in forecasting, data processing applications, instruments, etc., can solve problems such as economic losses, wind turbine off-grid, voltage fluctuations, etc., and achieve the effect of improving accuracy

Active Publication Date: 2016-07-06
SHANDONG UNIV
View PDF1 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2012, when there was no system failure in the Zhangbei wind power base, the voltage fluctuated greatly, causing a large area of ​​wind turbines to be disconnected from the grid, causing serious economic losses
The preventive control in the above literature is aimed at the fault set caused by line interruption, an...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Prevention and control method of online risk assessment based on wind power fluctuation
  • Prevention and control method of online risk assessment based on wind power fluctuation
  • Prevention and control method of online risk assessment based on wind power fluctuation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] The present invention proposes a new risk index to evaluate the impact of short-term wind power fluctuations on static voltage stability online. The proposed risk index combines the advantages of high short-term wind power prediction accuracy and Thevenin equivalent algorithm with small calculation amount, and gives a new risk index The severity function of is used to differentiate the different operating states in the security domain. Finally, IEEE9 node system and IEEE39 node system simulations are used to verify the effectiveness of the proposed risk indicators.

[0036] 1 Risk assessment of large-scale wind power grid integration

[0037] 1.1 Definition of risk indicators

[0038] A risk indicator is a comprehensive index that measures the probability and consequences of an event, and is used to assess the uncertain impact on the target. In ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a prevention and control method of online risk assessment based on wind power fluctuation. The prevention and control method comprises the steps of: predicting wind power output ranges at a future moment t<h+1> and corresponding probabilities by using a Markov chain model based on wind power fluctuation; for each predictive wind power output range, estimating a power grid operating state by using a local linear processing method; acquiring the severity of the corresponding wind power output range by using an obtained result and a severity function capable of reflecting the stability margin of a static voltage; acquiring an operating risk indicator in a computation period by using an acquired result; judging whether the risk indicator exceeds a set threshold value; if so, entering into a prevention and control model; on the premise of not discarding wind, adopting prevention and control to guarantee the power grid operating state change caused by random wind power fluctuation in a stability domain and to reduce an operating risk caused by short-term wind power fluctuation, controlling the risk indicator within the set threshold value; if not, carrying out risk assessment at a next moment.

Description

technical field [0001] The invention relates to the technical field of grid safety assessment, in particular to a prevention and control method based on online wind power fluctuation risk assessment. Background technique [0002] As a new type of clean energy, wind energy has become the development focus of many countries' energy strategies in the world. China's wind power installed capacity reached 114GW in 2014, ranking first in the world, and the government plans to increase the annual installed capacity of wind power by at least 20GW until 2020. The vigorous development of wind power can reduce greenhouse gas emissions and save fossil energy consumption, but due to the uncertainty and intermittency of wind power output, its large-scale grid connection has brought huge challenges to the safe operation of the grid. [0003] With the continuous increase of wind power grid-connected capacity, the impact of wind power randomness and uncontrollable multi-output scenarios unde...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06Q10/06G06Q10/04G06Q50/06
CPCG06Q10/04G06Q10/0635G06Q50/06
Inventor 贠志皓丰颖
Owner SHANDONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap