Original scientific paper
https://doi.org/10.30765/er.2447
PV integrated shipboard MVDC grid with reduced bus voltage ripple
Remna Radhakrishnan
; Department of Ship Technology, Cochin University of Science and Technology, Kerala, India
*
Mariamma Chacko
; Department of Ship Technology, Cochin University of Science and Technology, Kerala, India
* Corresponding author.
Abstract
Integration of renewable energy sources for power generation is a proven solution to reduce the increasing greenhouse gas emissions towards decarbonisation onboard ships. Also, it is easy to integrate a variety of energy sources in an all-electric ship under medium voltage direct current distribution system. In such distribution system, high frequency switching power converters are greatly involved on the source and the load sides, which are massive source of harmonics. In this paper, a grid connected photovoltaic module is designed and paralleled with the generator, as a step towards reducing greenhouse gas emissions. Additionally, to take care of the voltage ripple and noise created by the high frequency switching power converters in the system, a shunt direct current electric spring with a control strategy is incorporated. The proposed system eliminates the use of heavy passive filters, commonly used at the rectifier end. MATLAB/Simulink results substantiate that the increased voltage ripple with the inclusion of energy sources and loads, that goes around 10.91% under fully loaded condition, is reduced to 1.27% with the shunt direct current electric spring, hence well within the IEEE 1709 std., which is less than 5%.
Keywords
photovoltaic system; onboard ship; decarbonization; greenhouse gas emission; bus voltage ripple; shunt DC electric spring; medium voltage DC grid
Hrčak ID:
320424
URI
Publication date:
1.9.2024.
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