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Mitigating Wind Power Fluctuation Using Flywheel Energy Storage Systems
Greigarn, Tipakorn

2011, Master of Sciences (Engineering), Case Western Reserve University, EECS - System and Control Engineering.
As the penetration of wind energy increases, the effect of wind
fluctuations has gained
considerable importance. This thesis presents wind power
fluctuation mitigation using
a Flywheel Energy Storage System (FESS). An Interior Permanent Magnet Synchronous
Machine (IPMSM) driven by an IGBT Voltage Source Converter that was
chosen for the FESS due to its attractive features such as high dynamic efficiency,
high speed capability, and low electrical losses. The IPMSM was controlled by Field
Oriented Control which transform the the stator equivalent circuit from abc to dq
coordinate. Nonlinear coupling between direct and quadrature axis was cancelled out
by feedback linearization. A robust multi-input multi-output controller designed by
Quantitative Feedback Theory (QFT) was used to controlled the feedback linearized
system. Due to the saliency of the IPMSM rotor, both direct and quadrature axis
currents can be used to generate torque. A new current coordinating technique was
developed to determined the best combination of the currents. In low speed regime,
the coordinator selects the currents combination according to Maximum Torque per
Ampere Criterion to obtain high efficiency. High speed operation were also made possible
by the coordinator's Flux Weakening Regime. A robust controller was designed
using QFT to control the power of FESS injecting into the DC link of the wind farm.
The FESS has proven to be effective in mitigating power
fluctuation of a 10 MW
wind farm in SimPowerSystems™ simulations.
Mario Garcia-Sanz, PhD (Advisor)
J. Iwan D. Alexander, PhD (Committee Member)
Vira Chankong, PhD (Committee Member)

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Greigarn, T. (2011). Mitigating Wind Power Fluctuation Using Flywheel Energy Storage Systems. (Electronic Thesis or Dissertation). Retrieved from https://etd.ohiolink.edu/

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Greigarn, Tipakorn. "Mitigating Wind Power Fluctuation Using Flywheel Energy Storage Systems." Electronic Thesis or Dissertation. Case Western Reserve University, 2011. OhioLINK Electronic Theses and Dissertations Center. 31 Mar 2015.

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Greigarn, Tipakorn "Mitigating Wind Power Fluctuation Using Flywheel Energy Storage Systems." Electronic Thesis or Dissertation. Case Western Reserve University, 2011. https://etd.ohiolink.edu/

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