Abstract In this work, the non-liner voltage distribution in transformer winding is investigated that occurs due switching and lightning. Transformer winding is modeled in the alternative transients program (ATP) version of Electromagnetic transients program (EMTPRV). EMTP software is used to simulate the very fast transient overvoltage. An experimental setup that consist of , Recurrent surge g...

This paper is concerned with lightning surge propagation on wind turbines. As wind power generation undergoes rapid growth, lightning incidents involving wind turbines have come to be regarded as a serious problem. Nevertheless, no known studies exist yet in Portugal regarding lightning protection of wind turbines. In this paper we present an overview of Electro-Magnetic Transients Program (EMT...

This paper is concerned with lightning surge propagation on wind turbines. As wind power generation undergoes rapid growth, lightning incidents involving wind turbines have come to be regarded as a serious problem. Nevertheless, no known studies exist yet in Portugal regarding lightning protection of wind turbines. Hence, we present a case study, based on a wind turbine with an interconnecting ...

This paper proposes three techniques for locating lightning strikes in a 115 kV transmission system over 88.5 km, based on the arrival time of transient wave obtained from discrete wavelet transform (DWT). The first technique calculates location ’type D’ travelling method. second analyses and same reflected-back between two substations. In third technique, sensors are installed to...

Models for the calculation of lightning-induced voltages on distribution networks, should be able to take into account the presence of shielding wires and/or neutral conductors and of their relevant groundings. The paper deals with the estimation of the influence of these groundings with particular reference to the grounding electrode model on the calculated values of the lightninginduced volta...

The paper compares different channel models used for modeling Broadband Power-Line Communication (BPLC) system. The models compared are Zimmermann and Dostert, Philipps, Anatory et al and Anatory et al generalized Transmission Line (TL) model. The validity of each model was compared in time domain with ATP-EMTP software which uses transmission line approach. It is found that for a power-line ne...

This paper proposes the solutions to prevent over-voltage for the 220 kV distribution substations with several different voltage levels. The motivation comes from the failures of surge arrester number 2 of phase B at the transformer number 2 (CS2BAT2) of the Vietnamese 220 kV Thainguyen substation due to the over-voltage. The main objective is to enhance the operating stability of a scattered c...

Events such as lightning, switching of vacuum circuit breaker or operations in gas insulated substation (GIS) generate high frequency overvoltages. An equipment a transmission distribution system has to be protected against phenomena. Unfortunately, the traditional transformer models available Electromagnetic transient simulations program (EMTP-like) software packages are not capable representi...