Hierarchical Voltage Control of a Wind Farm Based on Droop Control

The increasing penetration level of wind power has brought a number of reactive/voltage control problems to power systems. In order to improve the voltage control effect, the wind power will be cut down in some extreme cases. To maximize the utilization of wind power, this paper proposes a hierarchical voltage control strategy based on droop control for the wind farm. First, capacitors and inductors are primarily optimized and determined to avoid abandoning wind power. Second, droop control is adopted for the voltage control at the point of common coupling (PCC) based on the local measurements. Finally, Case studies based on a wind farm connected to IEEE 14 bus system are deployed to verify the proposed strategy.