Voltage Control in Wind Power Generation Using Doubly Fed Induction Generators

In recent years around the world, conventional generation  plants are being replaced by wind power plants.

The rapid development of wind power generation brings new requirements for the integration of wind turbines to the Electric Power Systems. These requirements establish that the new technologies must provide ancillary services similar to those of conventional plants, such as voltage control in steady state and voltage control during faults occurring close to the wind power plant. This paper explores and compares the performance of two different alternatives of voltage control using doubly fed induction generator (DFIG) topology, which is the most used wind generation technology nowadays.

This performance is investigated in a transmission network to a disturbance which endangers the
stability of long term voltage thereof. In the first case, the voltage control of the terminal bus of the wind plant will be performed only through the rotor‐side converter, while in the second case; the voltage control will also have the additional contribution of the reactive power delivered by the grid side converter.

The results show the importance of this additional contribution of the reactive power to voltage system stability.

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