Abstract
In islanded microgrids, wind turbine generators have a significant impact on the power balance requiring a stability-supporting behavior. Therefore, the impact of technological characteristics and frequency control approaches of wind turbine generators 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 technologies and frequency-dependent active power adjustment control approaches are analyzed regarding the impact on a stable islanded microgrid operation. Based on the conducted investigations, the impact of the technology of wind turbine generators on the stable operation of islanded microgrids differs only marginally. The utilization of a virtual inertia concept without deadband hysteresis in medium voltage islanded microgrids positively affects 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.
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