The proposed DC bus voltage regulation method can effectively suppress high voltage fluctuation by charging and discharging the distributed ESSs implemented at the end sides. It can regulate the DC bus voltage without additional communication with the neighboring circuit and algorithm by charging and discharging sequences of the distributed ESSs.
Although the AC/DC converter that interfaces the DC microgrid and AC grid regulates DC bus voltage, the DC bus voltage of the DC microgrid can suffer from severe under- and overvoltage fault conditions. In this section, the under- and overvoltage conditions of bipolar DC bus voltage are analyzed. 2.1. Limited Power Capacity of AC/DC Converter
The proposed grid voltage regulation scheme using the distributed ESSs could regulate DC bus voltage in real time, regardless of the structure of the DC microgrid without external communication. Lastly, experimental results using a lab-scale bipolar DC microgrid prototype verified the proposed method.
From the DC bus voltage analysis of the bipolar DC microgrid, the high penetration of the RESs, transmission line impedance, and the low tolerance of the multilevel AC/DC converter according to the load unbalance cause the DC bus voltage fluctuation.
Figure 12 a shows the simulation results of the proposed voltage regulation algorithm at the overvoltage condition due to the high-power generation of RESs. Similar to the undervoltage condition, when the DC bus voltage increases by 4% of its nominal value, the bidirectional power interface monitors the DC bus voltage with an interval of 10 ms.
A droop control can also be utilized to regulate the DC bus voltage of DC microgrids [9, 10, 11]. However, it is vulnerable to transmission line impedance and brings DC bus voltage fluctuations. The droop control could also minimize the DC bus voltage fluctuation, but it requires communication with the neighboring circuits.
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Control Strategy for Bus Voltage in a Wind–Solar DC Microgrid
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SWO optimizes converter control; DRN predicts voltage regulation. SWO-DRN outperforms GA, PPO, and PSO with lower cost ($6,153,059). Energy storage systems (ESS) are crucial in renewable microgrid systems because they act as an energy buffer and balance out the demand-generation imbalance.
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Therefore, this paper analyzes the DC bus voltage fluctuation that can occur in the bipolar DC microgrid. An autonomous grid voltage regulation method is introduced to regulate the DC bus voltage of a bipolar DC microgrid …
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DOI: 10.3390/su16062307 Corpus ID: 268369361; Bus Voltage Stabilization of a Sustainable Photovoltaic-Fed DC Microgrid with Hybrid Energy Storage Systems @article{Uswarman2024BusVS, title={Bus Voltage Stabilization of a Sustainable Photovoltaic-Fed DC Microgrid with Hybrid Energy Storage Systems}, author={Rudi Uswarman and Khalid …
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regulate the DC bus voltage of a bipolar DC microgrid using distributed energy storage systems (ESSs). The proposed grid voltage regulation scheme using the distributed ESSs could regulate DC bus voltage in real time, regardless of the structure of the DC microgrid without external commu-nication. Lastly, experimental results using a lab-scale bipolar DC microgrid …
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