Exploitation of pitch control to improve the integration of a direct drive wind turbine to the grid

Abstract EN

The objective of this paper is to improve the integration of direct drive wind turbines to the grid using pitch control.

The proposed control strategy offers the possibility to regulate active and reactive powers delivered to the grid according to the Transmission System Operators (T.S.O) Request.

Firstly, the control algorithm of the generator side converter is developed.

For this converter, an MPPT algorithm and a pitch angle controller were designed in order to maximize and limit the extracted wind power.

Secondly, a control scheme for the grid side converter was proposed.

The main objectives of this control scheme are to keep constant the DC-link voltage and to control the reactive power delivered to the grid.

Finally, the wind system performances were evaluated in terms of accordance with the Grid Connection Requirements (G.C.R).

Different scenarios were simulated to evaluate the behavior and the stability of the wind system during normal operation conditions, power degradation and during grid faults.