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208 results on '"Ehsan, Mehdi"'

22. An MILP model for risk‐based placement of RCSs, DDGs, and tie lines in distribution systems with complex topologies.

Author

Zare‐Bahramabadi, Majid, Farzin, Hossein, and Ehsan, Mehdi

Subjects
PHOTOVOLTAIC cells, DISTRIBUTED power generation
Abstract

Remote‐controlled switches (RCSs) have the ability to quickly isolate the faulted area from other parts of distribution systems. On the other hand, the distributed generation resources (DGs) and tie lines can supply the interrupted loads after fault occurrence as a microgrid. In this regard, this paper proposes a planning model for simultaneous placement of RCSs, dispatchable DGs (DDGs), and tie lines in distribution systems with complex topologies to improve their reliability. Presence of renewable DGs (RDGs) including photovoltaic cells (PVs) and wind turbines (WTs), as well as the uncertainties of loads, RDGs, and outage duration of the faulted areas are also considered in the proposed planning model. Conditional value at risk (CVaR) is used to manage the system risk. The proposed planning model is formulated as a mixed integer linear programming model (MILP), which can be solved using various commercial solvers and give the global optimal solution. Finally, the proposed planning model is implemented on the IEEE 33 bus system as various cases to illustrate its effectiveness on improving the reliability of distribution systems and managing the system risk. [ABSTRACT FROM AUTHOR]

Published
2023
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36. An MILP Model for Switch, DG, and Tie Line Placement to Improve Distribution Grid Reliability

Author

Zare-Bahramabadi, Majid, Ehsan, Mehdi, and Farzin, Hossein

Abstract

Remote controlled switches (RCSs) have the ability to isolate the faulted area from other parts of the distribution system. On the other hand, the dispatchable distributed generators (DDGs) and tie lines can supply the interrupted loads after fault occurrence trough microgrids and reduce the outage time. In this regard, this article proposes a planning model for simultaneous placement of RCSs, DDGs, and tie lines to improve distribution system reliability. The presence of renewable distributed generations (RDGs) and energy storage systems, which have an increasing penetration in today's distribution networks are also considered. Moreover, two different practical load shedding methods are considered to balance the total generation and consumption in microgrids. The predetermined expansion plan of RDGs is also considered. To simplify the implementation of the proposed optimization model and ensure the global optimal solution, the planning model is formulated as a mixed integer linear programming model which can be solved by various commercial solvers. Finally, the effectiveness of the proposed model is illustrated by implementation on bus 4 of Roy Billinton test system through various case studies and sensitivity analyses. The results demonstrate the significant impact of the proposed planning model on improving the distribution system reliability.

Published
2023
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