Wind power grid-connection system operational reliability evaluation method considering uncertainty factors

An uncertain and reliable technology, applied in wind power generation, single-network parallel feeding arrangements, electrical components, etc., can solve problems such as incomplete consideration of factors, inability to realize real-time prediction and evaluation, and large computing resources

Active Publication Date: 2018-02-09
TAIYUAN UNIV OF TECH
View PDF3 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problems that the existing grid system operation reliability evaluation method does not consider comprehensive factors, the simulation method takes a long time, the convergence speed is slow, req

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
  • Wind power grid-connection system operational reliability evaluation method considering uncertainty factors
  • Wind power grid-connection system operational reliability evaluation method considering uncertainty factors
  • Wind power grid-connection system operational reliability evaluation method considering uncertainty factors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] The wind power grid-connected system operation reliability evaluation method considering uncertain factors includes the following steps:

[0077] 1. Modeling of Uncertain Factors Affecting Operational Reliability Evaluation:

[0078] A. Load comprehensive uncertainty modeling:

[0079] Operational reliability assessment is a measurement of the system's ability to meet load demand after various failure events occur. It is very necessary to correctly understand the change law of load and establish an accurate load model.

[0080] For this reason, the present invention fully considers load fluctuation, diversity, correlation, and directionality, and establishes a load comprehensive uncertainty model. Firstly, the ratio of hourly, daily, and weekly load peaks to the system's annual peak load is used to represent the expected load consumption at any time, and the time series load uncertainty model is obtained; secondly, based on the time series load, the improved period fuz...

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 relates to a reliability analysis method of an electric power system, specifically a wind power grid-connection system operational reliability evaluation method considering uncertainty factors, and solves the problems of incomplete consideration, long time consumption, slow convergence, resource occupation and incapability of realizing real-time prediction and evaluation of the existing method. A scheme comprises the processes as follows: I, uncertainty factor modeling: A, load comprehensive uncertainty; B, a conventional power generator comprehensive time varying operation model; C, comprehensive time varying operation modeling; D, wind power plant operational reliability modeling; and II, a Markov chain model: E, a Markov process and a Markov chain; F, a wind power Markov chain model; and G a wind power reliability evaluation index. The beneficial effects are achieved as follows: by performing quantitative analysis and comparison on the degree of influence of load fluctuation, element state and wind power output on the operational state and reliability level, the reliability level at the current moment can be evaluated, and the state probability at the future momentcan be quickly predicted, so that planning, overhaul, operation optimization and dispatching of the electric power system can be guided, thereby overcoming the shortcomings of the conventional evaluation method.

Description

technical field [0001] The invention relates to a method for analyzing the reliability of a power system, in particular to a method for evaluating the reliability of a wind power grid-connected system considering uncertain factors. Background technique [0002] With the continuous improvement of wind power penetration, wind power output fluctuations intensify the randomness of power grid operation status and power flow distribution, which has brought a huge impact on system reliability. In order to avoid large-scale blackout accidents, from the perspective of system operation, it is of great significance to accurately evaluate the reliability level of wind power grid-connected system and predict the probability of system operation state in the future to guide the operation and dispatch of the power grid. [0003] However, due to the intermittent and unpredictability of wind power output, coupled with the uncertain status of grid components and large load fluctuations, the ac...

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): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 韩肖清张文秀王鹏秦文萍贾燕冰张佰富袁铁江梁琛
Owner TAIYUAN UNIV OF TECH
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