Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title A Study on Enhancement Method for Hosting Capacity of PV System in Distribution System Based on Micro Hydropower Generator
Authors 최홍열(Hong-Yeol Choi) ; 이후동(Hu-Dong Lee) ; 페레이라마리토(Marito Ferreira) ; 박지현(Ji-Hyun Park) ; 노대석(Dae-Seok Rho)
DOI https://doi.org/10.5370/KIEE.2019.68.12.1511
Page pp.1511-1522
ISSN 1975-8359
Keywords Micro Hydropower Generator; PV System; Hosting Capacity; Reactive Power Control; Customer Voltage
Abstract According to the government's policy to demonstrate and expand the renewable energy sources, distributed generators such as PV(photovoltaic) and WP(wind power) are energetically installed and operated in distribution systems. However, there are many issues related to power quality problems including overvoltage of customers. In order to overcome these problems, the electric power company has installed a SVR(step voltage regulator) in primary feeders interconnected with PV systems, and also has established technical guidelines for distributed generators to stabilize the customer voltages in distribution systems. However, it is difficult to maintain the customer voltages within the allowable limit. Therefore, in order to actively introduce large-capacity PV system, this paper proposes optimal voltage control algorithm of MHG(micro hydropower generator) to keep customer voltages within the allowable voltage limit and presents evaluation algorithm for hosting capacity of PV system in distribution system based on sensitivity analysis method. Furthermore, this paper performs PSCAD/EMTDC modeling based on proposed algorithm and presents characteristics of customer voltages based on various scenarios related with location of PCC(point of common coupling) and capacity of PV and MHG. From the simulation results, it is confirmed that the proposed methods can contribute to the stabilization of the customer voltages and increase the hosting capacity of PV system in distribution system.