Abstract
The Alternating Current-Direct Current (AC-DC) hybrid distribution network has received attention in recent years. Due to advancement in technologies such as the integration of renewable energy resources of DC–type output and usage of DC loads in the distribution network, the modern distribution system can meet the increasing energy demand with improved efficiency. In this paper, a new AC-DC hybrid distribution network architecture is analyzed that considers distributed energy resources (DER) in the network. A network reconfiguration scheme is proposed that uses the AC soft open point (AC-SOP) and the DC soft open point (DC-SOP) along with an SOP selection algorithm for minimizing the network power losses. Subsequently, the real-time data for DER and load/demand variation are considered for a day-a-head scenario for the verification of the effectiveness of the network reconfiguration scheme. The results show that the proposed network reconfiguration scheme using AC-SOP and DC-SOP can successfully minimize the network power losses by modifying the network configuration. Finally, the effectiveness of the proposed scheme in minimizing the network power losses by the upgraded network configuration is verified by constructing an AC-DC hybrid distribution network by combining two IEEE 33-bus distribution networks.
Highlights
An increase in concerns about global climate change by reducing carbon emissions and limitation of fossil fuel resources has resulted in an increase in the use of distributed energy resources (DER), due to their potential benefits [1]
33 (Case E) and between feeders 18 and 25 (Case B) will cause the reduction of network power losses, while the AC soft open point (AC-soft open points (SOPs)) switch between feeder 18 and 33 (Case C) will have a worse performance regarding the reduction of network power losses
A power flow analysis is solved for the Alternating Current-Direct Current (AC-DC) hybrid distribution network incorporating voltage source converter (VSC) with different control modes
Summary
An increase in concerns about global climate change by reducing carbon emissions and limitation of fossil fuel resources has resulted in an increase in the use of distributed energy resources (DER), due to their potential benefits [1]. The contribution of this work is to propose a new methodology to allocate SOPs and DGs simultaneously and to consider possible multi-scenario configurations from random configurations This approach is used to investigate the contribution of SOP to the total active losses, as well as the effect of increasing the number of SOPs connected to the studied systems under different loading conditions to determine the real benefits gained from each strategy. Multi-scenario studies, which aim to improve the investigation of the overall performance of the strategies, are conducted on two IEEE 33node-balanced benchmark distribution systems integrated as a hybrid AC-DC distribution network It is clear from the results obtained that placing SOPs and DGs into a distribution system creates a hybrid configuration that merges the benefits offered by radial and meshed distribution systems and mitigates drawbacks related to losses. 33-bus distribution network, and the results show that the network power losses are efficiently minimized
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