ABSTRACT:
A
control algorithm for a standalone solar photovoltaic (PV)-diesel-battery
hybrid system is implemented in this paper. The proposed system deals with the
intermittent nature of the energy generated by the PV array and it also
provides power quality improvement. The PV array is integrated through a DC-DC
boost converter and controlled using a maximum power point tracking (MPPT)
algorithm to obtain the maximum power under varying operating conditions. The
battery energy storage system (BESS) is integrated to the diesel engine
generator (DG) set for the coordinated load management and power flow within
the system. The admittance based control algorithm is used for load balancing,
harmonics elimination and reactive power compensation under three phase
four-wire linear and nonlinear loads. A four-leg voltage source converter (VSC)
with BESS also provides neutral current compensation. The performance of
proposed standalone hybrid system is studied under different loading conditions
experimentally on a developed prototype of the system.
KEYWORDS:
1.
Admittance
based control algorithm
2.
BESS
3.
DG set
4.
Four-leg VSC
5.
Neutral
current compensation
6.
Power quality
7.
Solar
photovoltaic array
8.
Standalone
system
SOFTWARE: MATLAB/SIMULINK
CIRCUIT DIAGRAM:
Fig.
1. Schematic diagram of the proposed system
EXPECTED SIMULATION RESULTS:
Fig.2 Performance of proposed system under unbalance nonlinear load
CONCLUSION:
The
admittance based control technique has been used for a PV-diesel-battery hybrid
system for an uninterrupted power supply and power quality improvement. The
incremental based MPPT algorithm has delivered maximum solar array power under
varying conditions of temperature and insolation radiation. The technique has
been demonstrated to eliminate harmonics, load balancing and to provide neutral
current compensation by incorporating four-leg VSC in the system. The PCC
voltage and frequency have been maintained constant. Satisfactory performance
of the system has been observed through test results obtained for steady state
and dynamic conditions under both linear/nonlinear loads.
REFERENCES:
[1] Z. Jiang, “Power Management of Hybrid Photovoltaic-Fuel Cell Power
Systems”, Proc. of IEEE Power Engg. Society General Meeting, Montreal
Quebec, Canada, 2006.
[2] A. Naik, R.Y. Udaykumar and V. Kole, “Power management of a hybrid
PEMFC-PV and Ultra capacitor for stand-alone and grid connected applications”, Proc.
of IEEE Int. Conf. Power Electron. Drives and Energy Sys. (PEDES), 2012,
pp. 1-5.
[3] J. Philip, C. Jain, , K. Kant, B. Singh, S. Mishra, A. Chandra and K.
Al- Haddad “Control and implementation of a standalone solar photo-voltaic
hybrid system”, Proc. of IEEE Industry Applications Society Annual Meeting,
Addison, TX, 18- 22 Oct. 2015, pp.1-8.
[4] J. Philip, B. Singh and S. Mishra, “Design and operation for a
standalone DG-SPV-BES microgrid system”, Proc. of 6thIEEE Power India Int.
Conf. (PIICON), Delhi, 5-7 Dec, 2014, pp.1-6.
