Algorithm and implementation system for measuring impedance in the D-Q domain

US9140731B2 · kind B2 · utility

Assignee

• VIRGINIA TECH INTELLECTUAL PROPERTIES, INC. · US

Inventors

• Gerald T. Francis · Brighton, US
• Rolando Burgos · Blacksburg, US
• Dushan Boroyevich · Blacksburg, US
• Fred Wang · Knoxville, US
• Zhiyu Shen · Cary, US
• Paolo Mattavelli · Blacksburg, US
• Kamiar J. Karimi · Kirkland, US
• Sheau-Wei J. Fu · Bellevue, US

Key dates

• Filing date: Sep 14, 2012
• Grant date: Sep 22, 2015
• Expiry date: Aug 31, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R27/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A controller and infrastructure for an impedance analyzer measures responses to perturbations to respective phases of a multi-phase system at an interface between stages thereof (which may be considered as a source and load in regard to each other), such as a multi-phase electrical power system, to determine a transfer function for each phase of the multi-phase system from which the impedance of each of the source and load can be calculated, particularly for assessing the stability of the multi-phase system.