The energy sector uses enhanced grid-connected DFIG in the wind energy conversion system to minimize the expense.
FREMONT, CA: In recent years, both population growth and industrialization have contributed to a dramatic increase in the global demand for electrical energy, especially in developing countries. Moreover, because of the lack of non-renewable resources required to supply power generation plants fully, electricity prices continue to grow. Renewable energies are an especially appropriate response to the planet's tremendous energy requirements, which could increase by 50 percent or more by 2030.
Green wind energy, which is one of the sustainable and clean energy options for developing electricity, is found among these renewable energies. Wind speed, which can change rapidly during gusts, is one serious problem affecting such energy resources. With the use of an asynchronous engine, these velocity fluctuations produce significant mechanical stresses on the device that can be lowered with a synchronous generator that runs at a fixed pace. That is why, compared to fixed-speed wind turbines, the utilization of variable speed wind turbines is growing nowadays.
For variable speed wind turbine structures, the dual feed induction generator (DFIG) can be used. There are several reasons due to which the utilization of DFIG has increased. The first is that these machines are recognized for their resilience and low mechanical component effort, and the second is their potential for active and reactive control strength. Using the back-to-back converters to link the generator rotor to the grid enables a fraction of the total system power to pass. Therefore, the expense and losses are then minimized in the power electronics converter modules.
The Wind Turbine System (WTS) is a complicated structure with non - linearity, close coupling, multiple variables, random signal wind energy that are random, and disruption of system parameters induced by external environment disturbances. These problems make it difficult to achieve the exact mathematical model that provided the original design with significant challenges.
Therefore, designing more detailed and thorough control methods to address these disturbances and nonlinear issues is of great importance for the safe and reliable operation of the WTS and for achieving optimum power monitoring for these features of the WTS. A few research studies were currently proposed to regulate the rotor current utilizing proportional-integral (PI) regulators and directed stator flux control.
The ADRC, with the help of an extended state observer (ESO), collects the disturbance data directly from the input and output signals of the controlled entity and removes the disturbance by the final control quantity. The disturbance signal is canceled before it is added to the output signal. The ADRC control strategy has been extensively utilized in machinery manufacturing, power systems, and process control and has been highly praised by researchers worldwide. This disruption rejection command enables the customers to handle the system being tested as a simplified model. Real-time compensation is conducted for the adverse effects of external disruptions and modeling uncertainties.