NDLI: Assessment of wind turbine transient overvoltages when struck by lightning: experimental and analytical study

Content Provider	IET Digital Library
Author	Zalhaf, Amr S. Salam, Mazen Abdel Mansour, Diaa Eldin A. Ookawara, Shinichi Ahmed, Mahmoud
Abstract	This paper is aimed at presenting a numerical method for calculating the transient overvoltage across a wind turbine (WT) struck by lightning. The resulting overvoltage is determined at different points along the WT body using the proposed numerical method. The lightning strike has been simulated by injecting a current impulse to the tested WT. The equivalent circuits of WT components and the mathematical formulas to evaluate the circuit's parameters are presented. This makes it possible to develop π-equivalent RLC networks representing the WT components to write the nodal equations at each discrete time instant. MATLAB software package is used to solve the nodal equations and determine the transient behaviour of the WT. In the laboratory, a high impulse voltage is applied on a small-scale WT to corroborate the proposed method. The calculated overvoltage temporal variations are in good agreement with those measured at different positions along the WT for various grounding resistance values, demonstrating the validity of the proposed method. Further validation is also made by comparing the present simulation with that using PSCAD/EMTDC software package. The overvoltage values increase with the rise of the grounding resistance value. The obtained results are useful for designing WT lightning protection systems.
Starting Page	1360
Ending Page	1368
Page Count	9
ISSN	17521416
Volume Number	13
e-ISSN	17521424
Issue Number	Issue 8, Jun (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2018.5442
Journal	IET Renewable Power Generation
Publisher Date	2019-03-04
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Calculated Overvoltage Temporal Variations Circuit Parameter Current Impulse Discrete Time Instant Earthing Equivalent Circuit Grounding Resistance Value High Impulse Voltage Lightning Protection Lightning Strike Mathematical Formulas MATLAB Software Package Nodal Equation Numerical Method Overvoltage Overvoltage Protection Power System Protection PSCAD/EMTDC Software Package Resulting Overvoltage Transient Analysis Transient Behaviour Transient Overvoltage Wind Power Plant Wind Turbine Wind Turbine Transient Overvoltages Assessment WT Component WT Lightning Protection System Π-equivalent RLC Networks
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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