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Coordinated Planning of Converter-Based DG Units and Soft Open Points Incorporating Active Management in Unbalanced Distribution Networks
IEEE Transactions on Sustainable Energy ( IF 8.6 ) Pub Date : 2019-10-29 , DOI: 10.1109/tste.2019.2950168 Jian Wang , Niancheng Zhou , C. Y. Chung , Qianggang Wang
IEEE Transactions on Sustainable Energy ( IF 8.6 ) Pub Date : 2019-10-29 , DOI: 10.1109/tste.2019.2950168 Jian Wang , Niancheng Zhou , C. Y. Chung , Qianggang Wang
Soft open points (SOPs) can transfer active power between feeders and compensate reactive power. These features help increase the integration capacity of distributed generation (DG), but the installation location and capacity of SOPs will affect DG planning. In addition, the distribution networks are usually unbalanced due to asymmetric line parameters, unbalanced loads, and DG. Converter-based DG units and SOPs have individual phase active and reactive power regulating ability and provide unbalance compensation. The objective of this paper is to develop a coordinated planning model of converter-based DG units and SOPs in an unbalanced distribution network (UDN) to incorporate their individual phase power control abilities. The individual phase power control characteristics of DG converters and SOPs are first analyzed. A bi-level optimization model of converter-based DG units and SOP planning is then established, in which the upper-level problem minimizes the total cost of the UDN and the lower-level problem minimizes the power loss and voltage unbalance. The bi-level model is transformed into a single-level mixed integer second-order cone programming problem that can be efficiently solved by widely used commercial solvers. Finally, the proposed model is verified on IEEE 33-node and Taiwan Power Company systems.
更新日期：2019-10-29
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