Analysis of the Influence of the FIDVR Problem in the Operation of a DFIG under Unbalanced Conditions

Author(s)

Borges, Rafael C. ; Ramos, Rodrigo A. ; IEEE

• Document type: Journal article
• Source: 2016 IEEE PES TRANSMISSION & DISTRIBUTION CONFERENCE AND EXPOSITION-LATIN AMERICA (PES T&D-LA); v. N/A, p. 6-pg., 2016-01-01.

Abstract

This paper presents an analysis of the influence of the problem of Fault Induced Delayed Voltage Recovery (FIDVR), caused by the presence of induction motors, in the operation of a doubly fed induction generator (DFIG) connected to a distribution system operating under unbalanced conditions. The aim of this analysis is to determine the effect of the FIDVR problem in the oscillations of a DFIG with a comparison among results of balanced and unbalanced conditions. It was observed that, in the operation of the induction motor under unbalanced condition, the average torque produced by the induction motor is smaller (when compared to the balanced case) due to the negative sequence component of the electromagnetic torque. Thus, the FIDVR effect is aggravated by the unbalanced conditions, and this has a direct impact on the damping of the oscillations of the DFIG. The damping and frequency of the oscillations are determined by the Prony method. The results showed a decrease in damping of the oscillations of the generator operating under unbalanced conditions when compared to the balanced condition. Furthermore, in extreme cases can lead to the loss of stability of the generator. (AU)

• FAPESP's process: 15/02569-6 - Modeling, analysis and control of power systems operating with distributed generation
• Grantee: Rodrigo Andrade Ramos
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/24570-0 - Study of Distributed Generation Systems with the Connection with Asynchronous Generators
• Grantee: Rafael Cruz Borges
• Support Opportunities: Scholarships in Brazil - Doctorate