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http://dx.doi.org/10.5762/KAIS.2020.21.9.652

A Study on Searching Algorithm for Malfunction Pattern of Protection Devices in Distribution System with PV Systems  

Kwon, Soon-Hwan (Department of Eletrical Engineering, Korea University of Technology and Education)
Tae, Dong-Hyun (Department of Eletrical Engineering, Korea University of Technology and Education)
Lee, Hu-Dong (Department of Eletrical Engineering, Korea University of Technology and Education)
Rho, Dae-Seok (Department of Eletrical Engineering, Korea University of Technology and Education)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.9, 2020 , pp. 652-661 More about this Journal
Abstract
Recently, the Korean government developed the RE3020 (renewable energy) policy to overcome environmental problems, such as fine dust, climate change, and large-scale PV systems interconnected with a distribution system. When a large-scale PV system is interconnected in the distribution system, however, a malfunction can occur, and the protection devices may not be operated because of the dividing effect depending on the magnitude and direction of fault current as well as connection types and location of the PV system. Therefore, this paper proposes a search algorithm for the malfunction pattern of protection devices based on various scenarios, when large-scale PV systems are operated and interconnected in a distribution system. This paper presents a malfunction mechanism of protection devices according to the installation locations of recloser (R/C). Furthermore, the modeling of a distribution system with large-scale PV systems was performed using Off-DAS S/W, and the malfunction patterns of protection devices were analyzed based on a range of scenarios. From the simulation results with the proposed model and algorithm for searching for protection devices, it was confirmed that they are useful and effective in identifying a malfunction phenomenon depending on the installation location of the R/C and connection type of PV system.
Keywords
Distribution System; Malfunction Mechanism; Off-DAS S/W; Over Current Ground Relay(OCGR); Photovoltaic(PV) System; Protection Devices;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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