Masters Theses


Ravi Bhatt


"An optimized operating scheme for a grid-connected community based photovoltaic (PV) system is described. The system can participate in grid ancillary services like frequency and voltage regulation functions based on the Smart Grid framework. The proposed model comprises of a PV plant with Li-ion batteries coupled to the grid by means of a three-phase inverter. A two-way communication between the PV plant and the grid is assumed. The PV/storage plant provides constant updates on its current kW/kVar capability and the grid transmits the demand for specific amounts of power and for specific lengths of time. The battery charging energy can originate from either the PV system or the grid depending on the prevailing energy prices. The batteries are discharged when two conditions are met: the grid requests energy from the community-based PV system and if the PV system itself fails to meet the requested kW or kVar demand. The PV plant and the battery storage are integrated with the grid with the help of dc-dc and dc-ac converters in such a way that bi-directional flow of active and reactive powers can be achieved. Controllers integrating energy sources respond to the received signals and attempt to fulfill the grid demand. The system response is almost instantaneous and thus can be very helpful in grid frequency and voltage support"--Abstract, page iii.


Chowdhury, Badrul H.

Committee Member(s)

Kimball, Jonathan W.
Crow, Mariesa


Electrical and Computer Engineering

Degree Name

M.S. in Electrical Engineering


Missouri University of Science and Technology

Publication Date

Summer 2011


x, 71 pages

Note about bibliography

Includes bibliographical references (pages 67-68).


© 2011 Ravi Bhatt, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Frequency stability
Photovoltaic power systems
Renewable energy sources
Voltage regulators

Thesis Number

T 9804

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