Line to Ground fault analysis of DFIG and STATCOM using Simulated Annealing optimization-Part-I

The concept of Variable speed wind turbine is based on the Speed of the Wind that is instantaneous wind and its characteristics with the wind turbine. The main research area in the wind energy integration technique is to maintain a constant frequency at the output of the converter as it is to be interconnected to the power system where the frequency is constant. In an integrated power system why are several synchronous generators connected to support the grid at a constant frequency, because under this condition integrating a Variable-speed device to the traditional system main creates a lot of disturbance starting from overvoltage and Variable frequency and change in frequency may create a disturbance in the power allocation procedure and thereby increasing the load add some generating units. Also, frequency change in voltage may create the reactive power allocation and thereby affecting the power flow in the integrated system. The effort grid interconnection of wind system insecure the proper transformation of Variable frequency and voltage to a constant frequency and voltage as per the requirement of the grid. Coordinated reactive power control combining wind turbine double bed induction generator and STATCOM has been analyzed together during the fault condition. The model presented in this report concept of a multi-objective optimization problem. The objectives were being identified as the voltage at the terminal of wind turbine and low frequencies oscillation of active power for clearing of the fault. To achieve this Reactive power references for both wind turbines and STATCOM is necessary, therefore stochastic algorithm based on normalized simulated annealing has been applied