Transient Behaviour of Grounding System in a Two-Layer Soil Using the Transmission Line Theory
نویسندگان
چکیده
The present work deals with modeling of the transient behavior of grounding systems in the presence of layered media. A simple and efficient Transmission Line (TL) model featuring the use of the Finite Difference Time Domain (FDTD) is proposed. The proposed approach easily accounts for the influence of semi-infinite media (soil or air) and imposes conditions at the interfaces. The TL model is verified through the direct solution of the Maxwell’s equations in the time domain by means of the FDTD method. Some illustrative computational examples addressing some engineering applications stemming from industry are given in the paper.
منابع مشابه
Back-flashover Investigation of HV Transmission Lines Using Transient Modeling of the Grounding Systems
The article presents the transients analysis of the substation grounding systems and transmission line tower footing resistances which can affect to the back-flashover (BF) or overvoltage across insulator chain in an HV power systems by using EMTP-RV software. The related transient modeling of the grounding systems is based on a transmission line (TL) model with considering the soil ionization....
متن کاملبررسی جامع اضافه‌ولتاژهای صاعقه در مزارع بادی با پیکربندی‌های متفاوت به همراه تاثیر سیستم زمین
This paper is treated with major risks applied by lightning strikes to wind farms. The risks illustrated in this research include overvoltage caused by direct and indirect effects of lightning strikes on any components of wind farm. As demands for electrical energy throughout our world is increased more and more nowadays, wind power plants are extended in every possible locations correspondingl...
متن کاملDesign of Grounding Systems: A Transient Analysis
This paper is divided in two sections. The first one gives a procedure for the design of grounding systems, demonstrating the need of considering more complex soil structures, as the two layers soil model, in the design of safety grounding grids. The second section presents a transient model of a buried electrode based on the transmission line approach. The model enables to take into account th...
متن کاملDesign of Grounding Vertical Rods Buried in Complex Soils using Radial Basis Functions
In this paper, using neural networks based on radial basis functions (RBF), a comprehensive closed-form solution for effective length of vertical grounding rod is extracted in such a way that the two effects of ionization and dispersion are simultaneously considered. In creating the model, training data are computed from multi-conductor transmission line (MTL). As a results, firstly in the prop...
متن کاملارائۀ یک روش نوین به‌منظور مدل‌سازی جامع سیستم زمین دکل‌های فشار قوی و برج توربین‌های بادی با استفاده از روش برازش برداری
In the past, grounding systems usually were modeled by an individual Resistor. This estimation is useful only at low frequencies, while in high frequencies, the inductance of the grounding system plays the main role to identify the phase and amplitude of that. In recent years, as wind farms grow rapidly throughout the world, the grounding system and ground impedance of wind turbine towers under...
متن کامل