2020/06/03 by Tor Inge Reigstad, Reigstad, Tor Inge, Kjetil Uhlen +1
Engineering · #FOS: Electrical engineering #Frequency Control in Power Systems #Microgrid Control and Optimization #Systems and Control (eess.SY) #Wind Turbine Control Systems #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2006.02097
openalex publication_date 2020/06/03 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28
This paper presents the development of a non-linear model predictive\ncontroller (MPC) for controlling variable speed hydropower (VSHP) plants. The\nMPC coordinates the turbine controller with the virtual synchronous generator\n(VSG) control of the power electronics converter to optimize the plant's\nperformance. The main objective is to deliver a fast power response to\nfrequency deviations by utilizing the kinetic energy of the turbine and\ngenerator. This is made possible by allowing the turbine rotational speed to\ndeviate temporarily from its optimal speed. In addition, the efficiency should\nbe maximized while keeping the electric and hydraulic variables within their\nconstraints. The simulation results show that the proposed MPC is also able to\ndamp power oscillations in the grid, reduce water hammering in the penstock and\nimprove the future estimation of turbine head, turbine power and turbine flow.\nThis ensures that the turbine head does not exceed its limits and that the\novershoot in the turbine speed after a disturbance is reduced. Besides, the VSG\nconverter control enables a fast power response by utilizing the rotational\nenergy of the turbine and generator. Thereby, the VSHP can provide a\nsignificant amount of fast frequency reserves (FFR) to the grid.\n