Wind Speed And Rotor Position Sensorless Control For Direct-Drive PMG Wind Turbines

ABSTRACT:

Wind turbine generators (WTGs) are generally furnished with mechanical sensors to gauge wind speed and rotor position for framework control, checking, and protection.The utilization of mechanical sensors builds the expense and equipment intricacy and diminishes the unwavering quality of the WTG framework. This paper proposes a breeze speed and rotor position sensorless control for wind turbines specifically driving lasting attractive generators (PMGs). A sliding mode spectator is intended to assess the rotor position of the PMG, which is then used to ascertain the pole turning speed. In light of the deliberate yield electrical power and evaluated rotor speed of the PMG wind turbines, the mechanical intensity of the turbine is assessed by considering into the power misfortunes of the WTG framework. A back engendering fake neural system (BPANN) is then intended to evaluate the breeze speed progressively by utilizing the assessed turbine shaft speed and mechanical power. The assessed breeze speed is utilized to decide the ideal shaft speed or power reference for the PMG control framework. At long last, a sensorless control is created for the PMG wind turbines to constantly produce the most extreme electrical power without utilizing any wind speed or rotor position sensors. The legitimacy of the proposed estimation and control calculations are appeared by reenactment considers on a 3-kW PMG wind turbines and are additionally exhibited by test results on a 300-W useful PMG wind turbines.

 

BLOCK DIAGRAM:

                Fig. 1. Configuration of a direct-drive PMG wind turbine connected to a power grid.

EXPECTED SIMULATION RESULTS:

 

Fig. 2. Rotor position estimation results.

Fig. 3. Shaft speed estimation results.

Fig. 4. Shaft mechanical power estimation results.

Fig. 5. Wind speed estimation results.

Fig. 6. Shaft speed tracking results.

Fig. 7. Actual and optimal tip speed ratios.

CONCLUSION:

This paper has proposed a novel mechanical sensorless control calculation for most extreme breeze control age utilizing direct-drive PMG wind turbines. The estimations of wind speed, rotor position, and turbine shaft speed have been evaluated from the deliberate stator voltages and flows of the PMG continuously. These evaluated factors were then utilized for ideal control of the power electronic converters and the PMG. In this manner, the ordinarily utilized mechanical sensors in WTG frameworks, i.e., the breeze speed sensors and rotor position sensors, are not required. The adequacy of the proposed estimation strategies and sensorless control calculation have been exhibited by reenactment aftereffects of a 3-kW PMG wind turbine. Trial examines have been completed on a 300-W commonsense PMG wind turbine framework to additionally approve the proposed speed estimation calculations.

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