Specifications

Transmission electron microscopy - Tribology - X ray diffraction

Uncontrolled terms: Cyanate esters - Ester resins - Graphene oxides -

Intercalation methods - Mechanical and tribological properties - Preparation -

Preparation and properties - Resin composites - Resin matrix - Thermal behaviors -

Transmission electron microscopy tem

Classification code: 951 Materials Science - 931 Classical Physics; Quantum Theory;

Relativity - 815.1.1 Organic Polymers - 811 Cellulose, Paper and Wood Products -

804.1 Organic Compounds - 801 Chemistry - 741.3 Optical Devices and Systems -

741.1 Light/Optics - 415 Metals, Plastics, Wood and Other Structural Materials

DOI: 10.1016/j.polymertesting.2012.11.014

Database: Compendex

Accession number: 20130315910019

Title: Fuzzy optimization of crowbar resistances for low-voltage ride through of

doubly-fed induction generators

Authors: Ma, Haomiao1 ; Gao, Yong1 ; Yang, Yuan1 ; Zhang, Wenjuan2/马浩淼;高勇;杨媛;

张文娟

Author affiliation:

1 Automation and Information Engineering College, Xi'an University of Technology, Xi'an

710048, Shaanxi Province, China

2 Baoji University of Arts and Sciences, Baoji 721007, Shaanxi Province, China

Corresponding author: Ma, H. (mahaomiao@sina.com)

Source title: Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of

Electrical Engineering

Abbreviated source title: Zhongguo Dianji Gongcheng Xuebao

Volume: 32

Issue: 34

Issue date: December 5, 2012

Publication year: 2012

Pages: 17-23

Language: Chinese

ISSN: 02588013

CODEN: ZDGXER

Document type: Journal article (JA)

Publisher: Chinese Society of Electrical Engineering, Qinghe, Beijing, 100085, China

Abstract: The crowbar control is one of the main methods for low voltage ride through

(LVRT) of doubly-fed induction generators (DFIGs). The traditional crowbar resistance design is

associated with the constraint boundary valve of the stator and rotor current, and thus the

system security is affected. From this point of view, the fuzzy optimization theory was applied to

derive the estimation expression of the peak rotor current of DFIG and the constraints of the

crowbar resistance in the case of three-phase short-circuit faults in power grids. According to the

fuzzy optimization mechanism and above constraints, the fuzzy sets membership function and

fuzzy objective function about the crowbar resistance were established. The crowbar resistance