Abstract
This paper presents a battery supported standalone solar water pump (SWP) drive employing switched reluctance motor (SRM). This drive uses a three-level bidirectional DC–DC converter (TL-BDDC), which is responsible for the operations, such as maximum power extraction of PV array, regulation of the DC link voltage and split-capacitor voltage balancing. The converter also facilitates continuous active power sharing between DC link and the battery energy storage depending on the PV power generation. The TL-BDDC offers reduced voltage stress across the power switches improving the switching performance. Moreover, the developed system involves a single-phase voltage source inverter connected at the DC link to feed the domestic loads. In this work, an adaptive speed-based sliding-mode observer (AS-SMO) is implemented for position estimation of SRM rotor. This work provides a low-cost and efficient solution for solar standalone domestic water supply system. The steady state and dynamic test results through both simulation and experiments demonstrate its suitability for the solar PV water pumping applications.
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Acknowledgements
The authors thank the Ministry of Education and the Industry Partner, Shakti Pumps Ltd., India, for the encouragement under project titled: Uchhatar Avishkar Yojana and SERB–NSC Fellowship.
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Appendix
Appendix
Switched Reluctance Motor Parameters
SRM Configuration = 8/6; Phases = 4; R/ph = 0.7Ω; DC link = 400 V, Speed = 1500 rpm, Power = 1 hp.
Solar PV Array Parameters
Open circuit voltage of the PV array = 450 V; Short circuit current of the PV array = 6.6A; MPP Voltage of the array (@1000 W/m2 and 25 °C) = 380 V; MPP Current of the array (@1000 W/m2 and 25 °C) = 6.25A; Peak Power of the array at MPP = 2.375kWp.
VSI Control Parameters
kp = 0.1; ki = 0.001.
TL-BDDC Control Parameters
kp_dc = 0.025; ki_dc = 0.02; kp_bal = 0.01; ki_bal = 0.001; kp2 = 0.025; ki2 = 0.02.
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Yalavarthi, A., Singh, B. A Reliable Switched Reluctance Motor Driven Solar Water Pump with Battery Integration Using a Three-Level DC/DC Converter. Trans Indian Natl. Acad. Eng. 7, 995–1008 (2022). https://doi.org/10.1007/s41403-022-00341-3
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DOI: https://doi.org/10.1007/s41403-022-00341-3