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http://dx.doi.org/10.5762/KAIS.2021.22.3.1

A Study on Economic Evaluation Modeling of MVDC Distribution System for Hosting Capacity of PV System  

Lee, Hu-Dong (Korea University of Technology and Education)
Kim, Ki-Young (Korea University of Technology and Education)
Kim, Mi-Sung (Korea Testing & Research Institute)
Rho, Dae-Seok (Korea University of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.3, 2021 , pp. 1-12 More about this Journal
Abstract
Technologies for an MVDC(medium voltage direct current) distribution system are being considered as an effective alternative to overcome the interconnection delay issues of PV systems. However, the implementation of a DC distribution system might lead to economic problems because of the development of DC devices. Therefore, this paper deals with the scale of a PV plant based on its capacity and proposes hosting-capacity models for PV systems to establish a network to evaluate the feasibility of an MVDC distribution system. The proposed models can be classified as AC and DC distribution systems by the power-supply method. PV systems with hundreds of MW, dozens of MW, and a few MW can be categorized as large-scale, medium-scale, and small-scale models, respectively. This paper also performed modeling for an economic evaluation of MVDC distribution system by considering both the cost of AC and DC network construction, converter replacement, operation, etc. The profit was composed of the SMP and REC rate of a PV plant. A simulation for economic evaluation was done for the MVDC distribution system using the present worth and equal-principal costs repayment method. The results confirmed that the proposed model is a useful tool to evaluate economic issues of a DC distribution system.
Keywords
Economic Evaluation; MVDC Distribution System; Hosting Capacity; PV System; B/C Ratio;
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