Integration of PV, Battery and Super capacitor in islanded Microgrid

ABSTRACT:

Nowadays battery is used to stabilize the DC bus voltage but battery has low power density and high energy density. Whereas the supercapacitor has high power density but low energy density. So, for high energy and power density the integration of battery and supercapacitor is more efficient. It is more challenging to integrate the different sources. So it is required a control strategy to integrate the battery and supercapacitor and provide continuous power to the load. It has also shown that the battery and supercapacitor charged in access mode of power and discharged in deficit mode of power. In this paper proposed a new approach to control the power and dc bus voltage.

KEYWORDS:

  1. Battery
  2. MPPT Controller
  3. Photo Voltaic Cell
  4. Super capacitor

SOFTWARE: MATLAB/SIMULINK

BLOCK DIAGRAM:

Fig.1. Hybrid system model of PV, Battery and Super capacitor

EXPECTED SIMULATION RESULTS:

Fig.2. DC Bus voltages across two terminals using conventional controller

Fig.3. DC Bus voltages across two terminals using proposed controller

Fig.4. Power consumed by the load using conventional controller

Fig.5. Power consumed by the load using proposed controller

Fig.6. Power sharing between different sources using conventional Controller

Fig.7. Power sharing between different sources using proposed controller

Fig.8. SOC of Battery

Fig.9. Battery Voltage

Fig.10. Battery Current

Fig.11. SOC of Super capacitor

Fig.12. Voltage of Super capacitor

Fig.13. Current of Super capacitor

CONCLUSION:

In this paper proposed controller is used for proper sharing of power between different energy sources. Here LPF is used to differentiate between the average power supplied by battery and transient power supplied by super capacitor. Now, new scheme of converter is able to deal with fluctuation of voltage. The constant power and constant voltage across load were observed.

REFERENCES:

[1] U. Manandhar et al., “Energy management and control for grid connected hybrid energy storage system under different operating modes,” IEEE Trans. Smart Grid, vol. 10, no. 2, pp. 1626–1636  2019.

[2] B. H. Nguyen, R. German, J. P. F. Trovao, and A. Bouscayrol, “Real-time energy management of battery/supercapacitor electric vehicles based on an adaptation of pontryagin’s minimum principle,” IEEE Trans. Veh. Technol., vol. 68, no. 1, pp. 203–212, 2019.

[3] Z. Cabrane, M. Ouassaid, and M. Maaroufi, “Battery and supercapacitor for photovoltaic energy storage: A fuzzy logic management,” IET Renew. Power Gener., vol. 11, no. 8, pp. 1157– 1165, 2017.

[4] H. R. Pota, M. J. Hossain, M. A. Mahmud, and R. Gadh, “Control for microgrids with inverter connected renewable energy resources,” IEEE Power Energy Soc. Gen. Meet., vol. 2014-October, no. October, pp. 27–31, 2014.

[5] S. Angalaeswari, O. V. G. Swathika, V. Ananthakrishnan, J. L. F. Daya, and K. Jamuna, “Efficient Power Management of Grid operated MicroGrid Using Fuzzy Logic Controller (FLC),” Energy Procedia, vol. 117, pp. 268–274, 2017.

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