Abstract
This paper presents a grid connected solar photovoltaic (PV)-battery system using a double stage topology. The ESOGI (Enhanced Second Order Generalised Integrator)-based control estimates the positive sequence components (PSCs) of grid voltages, the amplitude of grid voltages, and unit templates. The VSC (voltage source converter) converts the DC power to AC power and providing constant power to the grid under a predefined power mode. VSC also performs multiple functions like balancing the grid currents, harmonics elimination, and providing reactive power compensation to the loads. Moreover, BDC (bidirectional converter) control maintains the voltage at the DC link and battery current. At low insolation levels, the battery supplies the required power to the load under a predefined power mode. Moreover, the battery supplies the predefined power to the grid under a predefined power mode condition. Under various dynamic conditions, simulated results and experimental results have shown a good performance.
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Funding
This work is supposed by UI-ASSIST, UKICERI and SERB-NSC with Grant Numbers RP03443, RP03391, and RP03128, respectively.
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AK and RJ contributed to conceptualization, methodology, formal analysis; AK, BS and SK contributed to software, investigation; AK contributed to writing—original draft preparation; BS and RJ contributed to writing—review and editing.
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Appendix
Appendix
Simulation Data: AC supply = 230 V, 50 Hz, Voc = 36 V, Isc = 7.8 A, Vmpp = 400 V, Battery: Capacity = 35Ah, Cdc = 2200 μF, Lf = 3.5mH, Rf = 6Ω, Cf = 10μF, Kpb = -4.1, Kib = 0.32, RL = 10Ω and LL = 50mH.
Experimental Data: AC Distribution System = 230 V, 50 Hz, Voc = 400 V, Isc = 13A, Ppv = 4.2 kW, Lf = 4mH, PL = 1.02 kW, Rf -Cf 6Ω and 10μF, Vdc = 340 V, Cdc = 2200μF, Kpd = 0.27, Kid = 0.00041.
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Kumar, A., Jain, R., Singh, B. et al. Double stage PV-BES weak grid connected system. Electr Eng 105, 2585–2593 (2023). https://doi.org/10.1007/s00202-023-01834-2
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DOI: https://doi.org/10.1007/s00202-023-01834-2