Analysis and Calculation of Rotor Currents for Doubly Fed Induction Generator at An Early Stage of Terminal Voltage Dip

DOI

10.2991/icismme-15.2015.421How to use a DOI?

Keywords

doubly fed induction generators(DFIG). voltage dip. Crowbar protection. rotor current

Abstract

It is important to analyze rotor current quantitatively for doubly fed induction generator(DFIG) initiated by terminal voltage dip for planning and configuration of relay protection of wind farms and grid including wind farms. The previous studies assumpt that the instantaneous activation of crowbar after the occurrence of terminal voltage dip. In fact, crowbar acts with different time delays depending on the severity of terminal voltage dip. Based on superposition principle, the terminal voltage is divided into steady-state value and increment. On condition that excitation voltage of rotor windings and rotating speed of rotor keep unchanged, the analytic model to calculate the increment of rotor current initiated by the increment of terminal voltage is derived in detail when crowbar is not triggered. Calculated results of the analytic model is compared with the numerical calculation, which verifies the effectiveness of the proposed analytic model.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jian Wang
AU  - Gangui Yan
AU  - Yong Sun
AU  - Chao Zheng
AU  - Qingkun Shen
PY  - 2015/07
DA  - 2015/07
TI  - Analysis and Calculation of Rotor Currents for Doubly Fed Induction Generator at An Early Stage of Terminal Voltage Dip
BT  - Proceedings of the First International Conference on Information Sciences, Machinery, Materials and Energy
PB  - Atlantis Press
SP  - 2039
EP  - 2043
SN  - 1951-6851
UR  - https://doi.org/10.2991/icismme-15.2015.421
DO  - 10.2991/icismme-15.2015.421
ID  - Wang2015/07
ER  -