Rotor Speed Control of a Direct-Driven Permanent Magnet Synchronous Generator-Based Wind Turbine Using Phase-Lag Compensators to Optimize Wind Power Extraction

Abstract

Due to the intermittent nature of wind, the wind power output tends to be inconsistent, and hence maximum power point tracking (MPPT) is usually employed to optimize the power extracted from the wind resource at a wide range of wind speeds. This paper deals with the rotor speed control of a 2 MW direct-driven permanent magnet synchronous generator (PMSG) to achieve MPPT. The proportional-integral (PI), proportional-derivative (PD), and proportional-integral-derivative (PID) controllers have widely been employed in MPPT studies owing to their simple structure and simple design procedure. However, there are a number of shortcomings associated with these controllers; the trial-and-error design procedure used to determine the P, I, and D gains presents a possibility for poorly tuned controller gains, which reduces the accuracy and the dynamic performance of the entire control system. Moreover, these controllers' linear nature, constricted operating range, and their sensitivity to changes in machine parameters make them ineffective when applied to nonlinear and uncertain systems. On the other hand, phase-lag compensators are associated with a design procedure that is well defined from fundamental principles as opposed to the aforementioned trialand-error design procedure. This makes the latter controller type more accurate, although it is not well developed yet, and hence it is the focus of this paper. The simulation results demonstrated the effectiveness of the proposed MPPT controller.

Electrical Generators for Large Wind Turbine: Trends and Challenges

“…This lessens the overall noise emission from the wind turbine. Finally, the full-scaled converter offers high operation flexibility over a large wind speed range [98,99] by decoupling the control of the machine-side and grid-side converter [100,101], which helps to enhance the performance of the wind energy conversion system and increase the energy yield [93]. Indeed, the power converter in a directly driven permanent magnet synchronous generator can be divided into a machine-side converter and grid-side converter interconnected by a DC-link capacitor.…”

“…Indeed, the power converter in a directly driven permanent magnet synchronous generator can be divided into a machine-side converter and grid-side converter interconnected by a DC-link capacitor. Meanwhile, the control of the machine-side converter is designed to achieve the maximum power point tracking (MPPT) by adjusting the synchronous permanent magnet generator's speed to the change in the wind speed [100,102]. The grid-side inverter helps in achieving the grid requirements in terms of voltage level (regulates the DC-link voltage), frequency, active and reactive power flow to the grid [103].…”

A Modified RBF Neuro-Sliding Mode Control Technique for a Grid Connected PMSG Based Variable Speed Wind Energy Conversion System

“…Ω ( ) represents the unknown uncertainties of the system. From (14), rewrite the dc-link voltage dynamic as ( = V 2 and V ( ) state, respectively, the square dc voltage, and the system uncertainties):…”

“…Linear controllers [8][9][10][11][12][13][14] have been studied and implemented. But the reduced range of operating points and poor robustness of these controllers with respect to machine uncertainties are their main limitations.…”

Neuro-adaptive backstepping integral sliding mode control design for nonlinear wind energy conversion system

“…Due to rapid increase in the worldwide installed capacity and the advancement in the wind turbine size and design, the wind energy is regarded as the mature technology and fastest-growing among all the other renewable energy sources [1].…”