A proposed supercapacitor-based mitigation of microgrid switching overvoltage

Abstract

Summary This paper investigates the effect of using a proposed supercapacitor‐based mitigation method to mitigate switching overvoltages (SOVs) on a microgrid system. At first, the effectiveness of the new proposed supercapacitor‐based mitigation method performance is evaluated. Then, a comparison between a traditional SOV mitigation method, such as surge arrester, and the proposed supercapacitor mitigation method is studied. SOVs result due to unsymmetrical switching operation during de‐energization procedures. The μG 2 operational modes, grid‐connected mode and isolated mode, are taken into consideration in this study. A small hydro generation unit and 3 variable speed, doubly fed induction generator‐based wind turbines are the main renewable power generation units in the investigated microgrid system. Alternating transient program is used in this study for simulating of the investigated microgrid.

Mitigation of transient overvoltages in microgrid including PV arrays

“…Many equivalent circuits and models are introduced in the literature for supercapacitors [32,33]. The parameters of the supercapacitor-based mitigation method include equivalent series resistance (R S ), small reactor (L), equivalent parallel resistance (R P ), and capacitance (C) [34,35].…”