A Two-level Coordination Strategy for Distribution Network Balancing
Uncertain distributed energy resources and uneven load allocation cause the three-phase unbalance in distribution networks (DNs), which may harm the health of power equipment and increase the operational cost. There are emerging opportunities to balance three-phase DNs with a number of power electro...
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| Vydáno v: | IEEE transactions on smart grid Ročník 15; číslo 1; s. 1 |
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| Médium: | Journal Article |
| Jazyk: | angličtina |
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Piscataway
IEEE
01.01.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| ISSN: | 1949-3053, 1949-3061 |
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| Abstract | Uncertain distributed energy resources and uneven load allocation cause the three-phase unbalance in distribution networks (DNs), which may harm the health of power equipment and increase the operational cost. There are emerging opportunities to balance three-phase DNs with a number of power electronic devices installed in the system. In this paper, we propose a novel two-level coordination strategy to improve the network balancing performance, where soft open points (SOPs) and phase switch devices (PSDs) are hierarchically coordinated in the network. At the upper level, a new type of SOPs with the function of phase switching is designed to explore the cross-phase power transfer ability; at the lower level, PSDs are utilized to flexibly allocate individual loads to specific phases. The two-level coordination strategy is typically formulated as a mixed-integer nonlinear programming (MINLP) problem. To solve the model accurately and efficiently, we develop a successive linearization algorithm to approximate it to a mixed-integer linear programming (MILP) problem at each iteration. On this basis, we propose a heuristic time-independent fixing algorithm to further ease the computational burden by eliminating a large number of integer variables in the MILP problem. Numerical simulations are conducted to validate the effectiveness, accuracy, and efficiency of the proposed method. |
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| AbstractList | Uncertain distributed energy resources and uneven load allocation cause the three-phase unbalance in distribution networks (DNs), which may harm the health of power equipment and increase the operational cost. There are emerging opportunities to balance three-phase DNs with a number of power electronic devices installed in the system. In this paper, we propose a novel two-level coordination strategy to improve the network balancing performance, where soft open points (SOPs) and phase switch devices (PSDs) are hierarchically coordinated in the network. At the upper level, a new type of SOPs with the function of phase switching is designed to explore the cross-phase power transfer ability; at the lower level, PSDs are utilized to flexibly allocate individual loads to specific phases. The two-level coordination strategy is typically formulated as a mixed-integer nonlinear programming (MINLP) problem. To solve the model accurately and efficiently, we develop a successive linearization algorithm to approximate it to a mixed-integer linear programming (MILP) problem at each iteration. On this basis, we propose a heuristic time-independent fixing algorithm to further ease the computational burden by eliminating a large number of integer variables in the MILP problem. Numerical simulations are conducted to validate the effectiveness, accuracy, and efficiency of the proposed method. |
| Author | Wang, Yi Cui, Xueyuan Ruan, Guangchun Vallee, Francois Toubeau, Jean-Francois |
| Author_xml | – sequence: 1 givenname: Xueyuan orcidid: 0000-0002-1917-8736 surname: Cui fullname: Cui, Xueyuan organization: Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China – sequence: 2 givenname: Guangchun orcidid: 0000-0003-2660-9298 surname: Ruan fullname: Ruan, Guangchun organization: Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, Boston, MA, USA – sequence: 3 givenname: Francois surname: Vallee fullname: Vallee, Francois organization: Electrical Power Engineering Unit, University of Mons, Mons, Belgium – sequence: 4 givenname: Jean-Francois orcidid: 0000-0001-9853-2694 surname: Toubeau fullname: Toubeau, Jean-Francois organization: Energy Systems Integration and Modeling Group, KU Leuven, Leuven, Belgium – sequence: 5 givenname: Yi orcidid: 0000-0003-1143-0666 surname: Wang fullname: Wang, Yi organization: Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China |
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| SubjectTerms | Algorithms Balancing Coordination Costs Energy sources hierarchical control Integer programming Inverters Iterative methods Linear programming Load management Load modeling Mathematical models Mixed integer Nonlinear programming phase switch device Power transfer Reactive power soft open points successive linearization Switches Three-phase unbalance Voltage control |
| Title | A Two-level Coordination Strategy for Distribution Network Balancing |
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