TITLE:
Isolated MicroGrid’s Voltage and Frequency Characteristic with Induction Generator Based Wind Turbine
AUTHORS:
Woo-Kyu Chae, Hak-Ju Lee, Sung-Wook Hwang, Il-Keun Song, Jae-Eon Kim
KEYWORDS:
MicroGrid, Wind Turbine, Induction Generator, Battery, Voltage, Frequency, PSCAD/EMTDC
JOURNAL NAME:
Smart Grid and Renewable Energy,
Vol.5 No.7,
July
11,
2014
ABSTRACT: To save on the
island area's power supply cost and protect the clean environment, the Isolated
MicroGrid is being duly considered. Consisting of the Wind Turbine Generator
(WT), photovoltaic generator, battery system, back-up diesel generator, etc.,
Isolated MicroGrid, which usually uses the inverter to maintain voltage and
frequency of the system, is very weak in terms of voltage and frequency
stability compared to the large-scale electrical power system. If wind turbine
generator is applied to this weak power system, it could experience many
problems in terms of maintaining its voltage and frequency. In this paper, the
measurement result of voltage and frequency is presented for MicroGrid, which
consists of the Wind Turbine Generator adopting the induction generator and
the battery system. MicroGrid’s voltage waveform distortion and Wind Turbine
Generator’s output oscillation problems are analyzed using PSCAD/EMTDC. Based
on the analyzed result, the importance of type and capacity choice has been
suggested in case the Wind Turbine Generator is applied to the Isolated
MicroGrid.