Solar photovoltaic (PV) renewable energy systems are undergoing major technological developments and large-scale field deployment and electric grid integration. This paper proposes a method of expanding the capacity of an existing irrigation farm with additional pumps powered by solar PV. The system includes PV arrays and battery energy storage connected to a common dc bus, which energizes an array of variable speed inverter driven pumps. Capacity modulation is achieved by energizing an optimal number of pumps required in order to meet a particular load demand with minimum supply energy. A grid connection to the dc bus of the power electronic system is established via a bidirectional converter, such that active and reactive power demands can be both serviced. The controls and the steady-state and transient performance of the system are implemented and simulated with the PSCAD TM /EMTDC TM software.

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Conference Proceeding

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Published in 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA).

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The document available for download is the authors’ manuscript version that is accepted for publication. The final published version is copyrighted by IEEE and will be available as: O. M. Akeyo, V. Rallabandi and D. M. Ionel, “Multi-MW solar PV pumping system with capacity modulation and battery voltage support,” 2017 IEEE 6th International Conference on Renewable Energy Research and Applications (ICRERA), San Diego,CA, 2017, pp. 423-428. doi: 10.1109/ICRERA.2017.8191097.

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