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Impact of Wind Turbine Generator Technologies and Frequency Controls on the Stable Operation of Medium Voltage Islanded Microgrids

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In islanded microgrids, wind turbine generators have a significant impact on the power balance requiring a stability-supporting behavior. Therefore, the impact of technological char-acteristics and frequency control approaches of wind turbine gen-erators needs to be identified. In this paper, the impact of wind turbine generator technologies and frequency controls in existing medium voltage islanded microgrids is evaluated. Different tech-nologies and frequency-dependent active power adjustment con-trol approaches are analyzed regarding the impact on a stable is-landed microgrid operation. Based on the conducted investiga-tions, the impact of the technology of wind turbine generators on the stable operation of islanded microgrids differs only margin-ally. The utilization of a virtual inertia concept without deadband hysteresis in medium voltage islanded microgrids positively af-fects the stable operation. Moreover, in case of multiple units, the diversity of technology and frequency control parameterization leads to a more stable islanded microgrid operation.

Author(s):

Dominik Willenberg    
Institute for High Voltage Technology - RWTH Aachen University
Germany

Alexander Winkens    
Institute for High Voltage Technology - RWTH Aachen University
Germany

Philipp Linnartz    
Institute for High Voltage Technology - RWTH Aachen University
Germany

 

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