Abstarct: Vertical-axis wind turbines, due to certain positive characteristics, have become favorable options in urban areas. However, compared to horizontal-axis turbines, this category has less capability to extract energy from wind flow. Consequently, extensive research is underway to understand the complex flow around these turbines and to improve their performance. One of the proposed ideas for enhancing the performance of these turbines is the continuous variation of blade pitch during each rotation. This approach aims to control the blade’s angle of attack in order to bring the aerodynamic behavior of each blade closer to its optimal state. A recently introduced pitch variation concept by researchers to improve the performance of the Darrieus wind turbine is baxsed on adjusting the angle of attack proportionally to the instantaneous angle of attack. In the initial idea, the angle of attack correction occurs with oscillations around a zero-degree pitch. As a result, the only adjustable parameter is the proportionality coefficient between pitch angle and angle of attack. In the present study, the initial pitch angle—around which oscillations occur—has been considered as another adjustable parameter. Unsteady numerical simulations were carried out using the finite volume method, employing the SST transition turbulence model and the sliding mesh technique. Various values of the proportionality coefficient and the initial pitch angle were examined. Results showed that the maximum power coefficient could be achieved using specific values for the proportionality coefficient and the initial pitch angle. For example, in the specific conditions corresponding to the tip speed ratio of 4, a considerable improvement could be achieved using a proportionality coefficient in the range 0.1 to 0.2 and an initial pitch angle in the range 1 to 2 degrees. Specifically, using the proportionality coefficient of 0.2 and the initial pitch angle of 1 degrees in this specific tip speed ratio, resuls in an about 18 percent increase in the power coefficient compared to the baxse case (the case with no pitch).