Sensitivity of Input Blocking Capacitor on Output Voltage and Current of a PV Inverter Employing IGBTs

This paper present a MATLAB-SIMULINK model of a single phase 2.5 KVA, 240V RMS controlled PV VSI (Photovoltaic Voltage Source Inverter) inverter using IGBTs (Insulated Gate Bipolar Transistor). The behavior of output voltage, output current, and the total harmonic distortion (THD), with the variation in input dc blocking capacitor (Cdc), for linear and non-linear load has been analyzed. The values of Cdc as suggested by the other authors in their papers are not clearly defined and it poses difficulty in selecting the proper value. As the dc power stored in Cdc, (generally placed parallel with battery) is used as input to the VSI inverter. The simulation results shows the variation in the output voltage and current with different values of Cdc for linear and non-linear load connected at the output side of PV VSI inverter and suggest the selection of suitable value of Cdc.





References:
[1] N. Mohan, T.M. Undeland, W.P. Bobins, "Power Electronics-
Convererters, Applications and Designs". 2nd edition, John Wiley &
Sons, 1995.
[2] T. Philip, "Elernents of Powel. Electronics". Oxford University Press,
1998.
[3] Sunil Kumar Chaudhry, Z.A. Jaffery, and V.K. Chandna, "Quality Assessment
of Low Cost Voltage Control Voltage Source Inverter (VCVS) using
Matlab Simulink". International Journal of Electrical Engineering, Vol. 3,
No. 1, pp. 15-24, 2010.
[4] Vinay Kumar Chandna, Z.A. Jaffery, and Sunil Kumar Chaudhry, "Simulation
of Single Phase RMS Controlled Voltage Source Inverter (VSI)
for variation in Cdc, Cs and Rs". IEEE International conference Power
Electronics Drive and Energy System, PEDES 2010, 21-23 Dec., 2010.
[5] G. Escobar, A.A. Valdez, J. Leyva-Ramos, and P. Mattavelli, "Repetitivebased
controller for a UPS inverter to compensate unbalance and
harmonic distortion". IEEE Trans. Ind. Electronics, Vol. 54, No. 1,
pp. 504-510, Feb. 2007.
[6] J.F. Fuller, E.F. Fuchs, and K.J. Roesler, "Influence of harmonics on power
distribution system protection". IEEE Trans. Power Delivery, vol. 3, pp.
549-557, Apr. 1988.
[7] M.E. De Oliveira Filho, J.R. Gazoli, A.J.S. Filho, and E.R. Filho, "A
control method for voltage source inverter without dc link capacitor".
Power electronics Specialists Conference, PESC 2008. IEEE 15-19,
pp. 4432-4437, June 2008.
[8] R. Parikh and R. Krishnan, "Modeling, simulation and analysis of an
uninterruptible power supply". in Proc. 20th Int. Conf. Ind. Electron.,
Control Instrument., Vol. 1, pp. 485-490, Sep. 5-9, 1994.
[9] M.K. Mishra, and K. Karthikeyan, ÔÇÿDesign and analysis of voltage source
inverter for active compensators to compensate unbalanced and nonlinear
loads". International Power Engineering Conference, 2007. IPEC
2007, pp. 649-654, 3-6 Dec. 2007.
[10] Sangshin Kwak and H.A. Toliyat, H.A., "Parallelized Inverters Configuration
with Current and Voltage Sources for High Power Applications".
IEEE, 37th Power Electronics Specialists Conference, PESC -06, 2006.
[11] N. Abdel-Rahim and J.E. Quaicoe, "Analysis and design of a multiple
feedback loop control strategy for single-phase voltage-source UPS
inverters". IEEE Trans. on Power Electronics, Vol. 11, No. 4, pp. 532-
541, Jul. 1996.
[12] M.J. Ryan, W.E. Brumsickle, and R.D. Lorenz, "Control topology
options for single-phase UPS inverters". IEEE Trans. Ind. Appl., Vol.
33, No. 2, pp. 493-501, Mar. 1997.