Transient stability of power system integrated with doubly fed induction generator wind farms

A new quantitative assessment of transient stability for power systems integrated with doubly fed induction generator (DFIG) wind farms is proposed by evaluating the transient energy margin (TEM) through the formulation of the transient energy function (TEF) for multimachine systems. To achieve an a...

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Bibliographic Details
Published in:IET renewable power generation 2015-03, Vol.9 (2), p.184-194
Main Authors: Chowdhury, Md Ayaz, Shen, Weixiang, Hosseinzadeh, Nasser, Pota, Hemanshu Roy
Format: Article
Language:English
Subjects:
advanced reactive power compensating device
Assessments
asynchronous generators
critical machine separation
Devices
DFIG
doubly fed induction generator wind farm
Electric potential
fault clearing time
Faults
Induction generators
inferior transient stability
load operation
multimachine system
postfault trajectory
potential energy boundary surface
power reserve system
power supply quality
power system faults
power system reliability
power system transient stability
Reserves
TEF
TEM
transient analysis
transient energy function
transient energy margin
Transient stability
unstable equilibrium point
voltage sag
wind farm geographical dispersion
Wind power
wind power penetration level
wind power plants
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Summary:A new quantitative assessment of transient stability for power systems integrated with doubly fed induction generator (DFIG) wind farms is proposed by evaluating the transient energy margin (TEM) through the formulation of the transient energy function (TEF) for multimachine systems. To achieve an accurate TEM, the TEF is modified to account for the separation of the critical machines from the system and an unstable equilibrium point is calculated on the basis of post-fault trajectory reaching the potential energy boundary surface. Simulation results show that such power systems integrated with DFIG wind farms are more sensitive to transient events of higher voltage sag, longer fault clearing time, lower load operation and higher wind power penetration level. It is also observed that machines located far from the fault are also exposed to inferior transient stability because of fault with geographical dispersion of wind farms. As a result, advanced switchgear, faster isolators, more efficient power reserve systems and advanced reactive power compensating devices must be equipped to ensure reliable operation of power systems integrated with the DFIG wind farms during transient events.
ISSN:1752-1416
1752-1424
1752-1424
DOI:10.1049/iet-rpg.2014.0035