Wind turbines are able to contribute to the frequency stabilization of the electric grid by providing inertial power. As long as the grid frequency corresponds to the nominal value, a wind turbine in partial load range can be operated at the maximum power point (MPP) for maximizing the energy yield. In response to a frequency drop, an inertial control increases the power output for supporting the grid with a reduction of speed as a result. Once the frequency is stabilized, a return in the MPP by accelerating the drive train should happen. For this, the power output of the MPP tracking needs to be speed-dependent, which leads to power fluctuations when wind fluctuations are taken into account. A novel control structure is introduced that uses a special form of MPP tracking, targeting a smooth power output and a guarantee of operational stability. Its behavior is analyzed on the basis of simulation results.
Control for the Provision of Virtual Inertia by Wind Turbines with PMSG considering Wind Fluctuations
2020-09-10
617406 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Model Predictive Control of PMSG-Based Wind Turbines for Frequency Regulation in an Isolated Grid
BASE | 2018
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