Hybrid Order Generalized Integrator based Control for VSC to Improve the PMSG Operation in Isolated Mode
Ashutosh K. Giri, Sabha Raj Arya, Rakesh Maurya
Abstract
This paper presents the Hybrid order means the combination of Second- and Third-Order Generalized Integrator (MS-TOGI) based Control is applied here to operate voltage source converter (VSC) which is used to improve the power quality of Permanent Magnet Synchronous Generator (PMSG). The wind energy driven PMSG is working in isolated mode and supplying power to remotely located linear/nonlinear loads. The use of MSTOGI as a control method is helpful to eliminate the DC offset effect from the disturbed supply voltage unlike second order generalised integrator (SOGI) control whose performance suffers under distorted supply conditions. Therefore, unit voltage templates are purely sinusoidal and used to extract the reference source current to generate the pulses for VSC. The proposed control is utilized to control the total harmonics distortion in the supply current, load balancing at the generator terminal, reactive power compensation and zero voltage and frequency regulation at the generator end. The entire system is developed in MATLAB simulink prototype for simulation study. The results obtained are compared with the existing SOGI control and found that the proposed control algorithms on this system has performed better in terms of dynamics voltage and frequency response with less steady state error.