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Strong Dynamic Interactions of Grid-Connected DFIGs With Power Systems Caused by Modal Coupling
- Source :
- IEEE Transactions on Power Systems. 32:4386-4397
- Publication Year :
- 2017
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2017.
-
Abstract
- This paper establishes a closed-loop interconnected dynamic model of a power system with a doubly fed induction generator (DFIG) for wind power generation, wherein, the DFIG and power system are modeled as two open-loop interconnected subsystems. The established model indicates that the impact of the dynamic interactions introduced by the DFIG on the power system's small-signal angular stability is the difference between the closed-loop and open-loop electromechanical oscillation modes (EOMs). The analysis conducted in this study reveals that when an open-loop DFIG oscillation mode (DOM) is close to an open-loop EOM on the complex plane, the modal coupling of the open-loop EOM and DOM can cause strong dynamic interactions between the DFIG and the power system; thus, the DFIG has a significant impact on the power system's small-signal angular stability. An example multimachine power system with grid-connected DFIGs is presented to demonstrate and validate the analysis and conclusions made in the paper.
- Subjects :
- Modal coupling
Engineering
business.industry
Oscillation
020209 energy
Mode (statistics)
Energy Engineering and Power Technology
02 engineering and technology
Grid
law.invention
Electric power system
law
Control theory
Control system
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
business
Doubly fed electric machine
Complex plane
Subjects
Details
- ISSN :
- 15580679 and 08858950
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Power Systems
- Accession number :
- edsair.doi...........d2910fc89903cb165dee3007e780f72d