Title :
Active commutated thyristor CSI for grid connected photovoltaic applications
Author :
Prasad, J. S Siva ; Fernandes, B.G.
Author_Institution :
Energy Syst. Eng., Indian Inst. of Technol., Mumbai, India
Abstract :
A new three phase active commutated thyristor current source inverter (CSI) topology is proposed for grid connected photovoltaic systems. Space vector PWM with a special switching sequence, which ensures proper commutation of thyristors, is implemented. In order to suppress the natural frequency of oscillations of LC filter and to ensure stability of the system, a charge controller in synchronous rotating reference frame is described. This allows easy design of PI controller gains. The simulation results of a 7-kVA inverter are presented.
Keywords :
PI control; PWM invertors; commutation; passive filters; photovoltaic power systems; power semiconductor switches; power system stability; thyristors; 7 kVA; CSI; LC filter; PI controller; active commutated thyristor; charge controller; current source inverter; grid connection; oscillations; photovoltaic systems; space vector PWM; stability; switching sequence; synchronous rotating reference frame; thyristor commutation;
Conference_Titel :
Power Electronics and Motion Control Conference, 2004. IPEMC 2004. The 4th International
Conference_Location :
Xi´an
Print_ISBN :
7-5605-1869-9
