Authors : Sanjeev Kumar Gagrai, Sundram Mishra and Madhu Singh
Abstract: Traditionally fixed speed drives are commonly used in small hydro power plants. With the development power electronics converter an autonomous variable speed drives, i.e., Doubly Fed Induction Generator (DFIG) came into the fashion. Small hydropower plant as an alternative source of energy plays a vital role in altering the face of any developing country in terms of environment protection, economic growth and energy crisis. The focal motive of this proposed research work is to implement the advanced control strategy, i.e., Artificial Neural Network (ANN) in grid-connected Doubly Fed Induction Generator (DFIG) associated with Small Hydro Power Plant (SHPP). The proposed control scheme regulates both sides of converter, i.e., converter of grid side and rotor side and maintains the power factor at unity level in the grid side for diminishing the loss as well as regulating the effectual real and reactive power flow in the rotor side. With the assistance of DFIG, optimum real and reactive power flow from the rotor side to grid side occurs at an inconstant speed, i.e., super synchronous, synchronous and sub-synchronous speed. Along with this, controller of the grid side also maintains the DC bus voltage at a constant level for proper operation of rotor side as well as grid side. A 2 MW DFIG associated with 2 MW SHPP Model is simulated in Simulink for time domain applications. The system is stable under different load conditions and it is investigated with the help of model and simulations result. The ANN controller improves the dynamic response of DFIG and makes the system more apposite for real-time applications.
Sanjeev Kumar Gagrai, Sundram Mishra and Madhu Singh, 2019. Dynamic Modelling and Simulation of Grid Coupled DFIG Designed for 2 MW SHPP using ANN Scheme. Journal of Engineering and Applied Sciences, 14: 3813-3831.