ABSTRACT:
In
this paper, a distributed incremental adaptive filter (DIAF) controlled utility
interfaced photovoltaic (PV) - battery microgrid system is presented with power
quality features. From protection aspects, grid tied solar inverters are
required to shut down at loss of the utility. However, the multi-purpose
PV-battery system is developed to provide energy to the critical loads, even at
loss of distribution network. The bidirectional controlled converter with a
battery also mitigates the intermittency of a PV array under rapid variations
in the weather. The extracted maximum power is supplied to the voltage source
converter (VSC), which is transferred to the nonlinear loads and the utility.
The distributed incremental adaptive filter is used to control the VSC with
contribution of PV power and the battery. In addition, the DIAF control
provides harmonics mitigation, load balancing and power factor improvement
functionalities in order to deal with system connected with nonlinear loads. A
PV power feed-forward (PVFF) term is incorporated in the current control for
injection of active power to the utility as well as to improve the dynamic
operation of residential PV-battery microgrid. The battery energy storage (BES)
reduces the fuel bills and it is also utilized to provide smoothing attributes
to the microgrid. The effectiveness of PV-battery microgrid is validated
experimentally developed in the laboratory.
KEYWORDS:
1. PV-battery microgrid
2. Power quality and distributed incremental adaptive
filter
SOFTWARE:
MATLAB/SIMULINK
CONCLUSION:
The
distributed incremental adaptive filter (DIAF) based control of residential
PV/battery microgrid system for rural electrification, has been demonstrated
for it’s satisfactorily operation. The focus of this topology has proved
continuous supply by integrating the battery back-up with a PV array even under
the outage of PV array and utility grid. The charging and discharging of the
battery depending upon the state of charge (SOC) level, have been decided by
the cascaded PI control. Test results of extracted PV energy and dynamic load
and insolation change are studied for validation of control technique.
Moreover, the power quality indices are provided, which are within limit of the
IEEE-519 standard.
REFERENCES:
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