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http://dx.doi.org/10.7471/ikeee.2018.22.3.539

Design of Modified Slip-Mode Frequency Shift Islanding Detection Method for Power Quality Improvement  

Kim, Dong-Uk (Division of Electrical Engineering, Hanyang University, ERICA Campus)
Kim, Sungmin (Division of Electrical Engineering, Hanyang University, ERICA Campus)
Publication Information
Journal of IKEEE / v.22, no.3, 2018 , pp. 539-547 More about this Journal
Abstract
Grid-connected inverter is required to cut off the power supplied to the grid at the islanding condition, immediately. For this reason, an islanding detection is an indispensable function for grid-connected distributed generation system. Slip-Mode frequency Shift (SMS) islanding detection method is very popular method to determine the grid state. SMS method supplies the reactive power to the load according to the grid frequency. In the islanding condition of grid, this injected reactive power pulls out the grid frequency from the allowable range, then the inverter system can detect the islanding condition of the grid. The SMS method can detect the islanding state well and does not generate any harmonics of the grid current. However, the reactive power would be generated and the power quality is reduced even though the grid is not islanding condition, but normal condition. In this paper, a modified SMS method is proposed to remove the reactive power in the normal condition. The performance of the proposed method is evaluated by 600W single phase inverter experimental results.
Keywords
Anti-islanding Detection; Grid Connected Inverter; Non-Detection Zone; Slip Mode Frequency Shift; Power Quality;
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