NDLI: Mitigation of switching overvoltages in microgrids based on SVC and supercapacitor

Content Provider	IET Digital Library
Author	Awad, Eman A. Badran, Ebrahim A. Youssef, Fathi H.
Abstract	This study investigates three different techniques to mitigate the switching overvoltages (SOVs) in the microgrids. At first, the effectiveness of reactive power compensation devices, such as static var compensator (SVC), is evaluated. After that, the performance of the supercapacitor (SC), as an energy storage device, is studied. Finally, with the addition of the SVC to the SC, the possibility to mitigate SOV by compensating both active and reactive power simultaneously is investigated. SOVs result due to unsymmetrical switching operation during de-energisation (disconnection) procedures. The μG two operational modes; grid connected mode and isolated mode, are considered. A small hydro generation unit and three variable speed, double-fed induction generator-based wind turbines are the main renewable power generation units in the tested microgrid system. Alternative Transient Program is used in this study for simulating the compensation device, the energy storage device and the investigated microgrid. The study shows that through the μG two operational modes, the SC has priority over the other two investigated mitigation methods. Furthermore, using the SC or SC with SVC, the results have more regular voltage waveforms.
Starting Page	355
Ending Page	362
Page Count	8
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 2, Jan (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.0503
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-09-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Power Compensation Asynchronous Generator Asynchronous Machine De-energisation Procedure Disconnection Procedure Distributed Power Generation Energy Storage Energy Storage Device Grid Connected Mode Hydroelectric Power Stations And Plant Isolated Mode Microgrid System Other Power Apparatus And Electric Machine Reactive Power Compensation Device Regular Voltage Waveform Renewable Power Generation Units Small-hydro Generation Unit SOV Mitigation Static Var Compensator Static VAr Compensators Supercapacitor SVC Switching Overvoltage Mitigation Transient Program Unsymmetrical Switching Operation Variable Speed Double-fed Induction Generator Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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