Integration of PV/Battery
Hybrid Energy Conversion System to the Grid with Power Quality Improvement
Features 2013
Grid integration of photo
voltaic (PV)/Battery hybrid energy conversion system with (i) multi-functional
features of micro grid-side bidirectional voltage source converter (μG-VSC)
(ii) tight volatge regulation capability of battery converter (iii) MPPT tracking
performance of high gain integrated cascaded boost (HGICB) dc-dc Converter with
quatratic gain and less current ripple are presented in this paper. The PV side
HGICB Converter is controlled by P&O MPPT algorithm to extract the maximum
power from the variable solar irradiation. This paper proposes a modified
Instantaneous symmetrical components theory to the μG-VSC in micro-grid
applications with following intelligent functionalities (a) to feed the
generated active power in proportional to irradiation levels into the grid (b)
compensation of the reactive power, (c) load balancing and (d) mitigation of
current harmonics generated by non-linear loads, if any, at the point of common
coupling (PCC), thus enabling the grid to supply only sinusoidal current at
unity power factor. The battery energy storage system (BESS) is regulated to
balance the power between PV generation and utility grid. A new control
algorithm is also proposed in this paper for the battery converter with tight
DC link voltage regulation capability. The dynamic performance of battery
converter is invistegated and compared with conventional average current mode
control (ACMC). A model of a hybrid PV Energy Conversion System is developed
and simulated in MATLAB/SIMULINK environment. The effectiveness of the proposed
control strategies for HGICB converter and μG-VSC with battery energy
conversion system are validated through extensive simulation studies.
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