Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Doubly-fed fan grid-connected port output impedance modeling and stability analysis method

A double-fed fan and output impedance technology, which is applied in the direction of single-network parallel feeding arrangement, special data processing applications, instruments, etc., can solve the problems that the impedance model of double-fed fan cannot be established to provide indicative functions, and stability analysis is difficult. Achieve the effect of clear meaning of physical quantity, simple structure, simple and effective analysis method

Active Publication Date: 2019-12-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF9 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modular input impedance brings great difficulties to the stability analysis, and there are obvious deficiencies, which cannot provide an indicative role for the establishment of the impedance model of the double-fed fan

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
  • Doubly-fed fan grid-connected port output impedance modeling and stability analysis method
  • Doubly-fed fan grid-connected port output impedance modeling and stability analysis method
  • Doubly-fed fan grid-connected port output impedance modeling and stability analysis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to describe the present invention more specifically, the present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0043] In this embodiment, a doubly-fed wind generator DFIG with a capacity of 3.0MW and a rated voltage of 690V is taken as an example, and the model is built using the motor convention. In the embodiment, firstly, the parameters in the fan and the measurement module are per unitized. The parameters of DFIG are as follows: Stator resistance R s =0.013pu, rotor resistance R r =0.024pu, stator inductance L s =0.239pu, rotor inductance L r =0.213pu, stator and rotor mutual inductance L m =3.99pu, number of pole pairs p=3, specifically including the following steps:

[0044] 1, figure 1The equivalent circuit diagram for doubly-fed wind turbines integrated into weak grid, refer to figure 1 , a method for modeling and stability analysis of the output impedance of the gr...

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 doubly-fed fan grid-connected port output impedance modeling and stability analysis method. The method is characterized in that influence of a doubly-fed fan stator flux linkage component and phase-locked loop and current loop links in a fan control system on output impedance of a system is comprehensively considered, a doubly-fed fan grid-connected port overall output impedance model and a weak power grid impedance model are established, based on the two models and a generalized Nyquist stability criterion, influence of grid-connected doubly-fed fan output impedancecharacteristics on stability under the weak power grid condition is analyzed, and then optimization design of fan control system loop parameters is guided. The impedance model provided by the invention is simple in structure and has good accuracy; the stability analysis method is simple and effective, and the model and the method are provided for doubly-fed fan grid-connected small-interference stability analysis under the weak power grid condition.

Description

technical field [0001] The invention belongs to the research field of grid-connected stability of doubly-fed induction generators, and in particular relates to a modeling and stability analysis method for the output impedance of a doubly-fed fan grid-connected port. Background technique [0002] Since the beginning of the 21st century, with the increasingly serious crisis of traditional fossil energy and environmental pollution, the development and utilization of new energy has become the consensus of all countries in the world. Among them, wind power generation, after nearly two decades of practical testing, has become recognized as the most promising form of new energy for commercial development. Domestic wind farms are mostly distributed in the "Three North" regions. Considering that this region is far away from the load center, has a small short-circuit capacity, and is greatly affected by load switching, the impedance of the transmission line cannot be ignored. Doubly-...

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): H02J3/38G06F17/50
CPCY02E10/76
Inventor 徐海亮张禹风王诗楠李志聂飞刘壮壮
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com