Lightning - Induced Voltages on Overhead Distribution Lines : Theoretical and Experimental Investigation of related Problems and their Impact on Power Quality
نویسندگان
چکیده
Recent power quality studies have been focused on the source-identification of voltage disturbances at distribution network busses. This paper describes a method aimed at correlating indirect-lightning events with power systems relay operations, associated with voltage dips. The proposed method, based on the coordinated use of the Italian lightning location system CESI-SIRF, the Italian monitoring system of protection manoeuvres CESI-SAM, and the availability of an advanced simulation tool for the accurate simulation of lightning-induced voltages on complex power networks, namely the LIOVEMTP code, is applied to the real case of an Italian distribution system. The LIOV-EMTP code is also employed along with a statistical procedure based on the Monte Carlo method to carry out a statistical analysis aimed at assessing the lightning performance of a typical Italian distribution line.
منابع مشابه
Lightning-induced Overvoltages in Overhead Power Distribution Lines: Importance of the Line Grounding Electrodes Modeling
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...
متن کاملLaboratory Study of the Lightning Attractive Width for Transmission Lines
This research focuses on an investigation of the attractive width of high voltage transmission lines to lightning strokes. In order to design the optimal lightning protection, the estimated number of lightning flashes to the line, which is based on its attractive width, needs to be determined. The investigation was performed using experiments with tested models at the Mississippi State Universi...
متن کاملSensitivity Assessment of Lightning Protection Device Aging Effect on Distribution Substation Insulation
Insufficient electrical endurance of equipment and insulation failure against overvoltage is one of the most effective reasons for failure the power line. Lightening, switching or other disruptive parameters can cause line outage or distribution substation failure. There are different devices used to improve the safety, reliability, and power quality of the system. Surge arresters are one of t...
متن کاملA Method for the Assessment of the Indirect Lightning Performance of Distribution Networks
The paper presents a general procedure for the evaluation of the indirect lightning performance of a distribution network, which takes into account the actual network topology and the presence of transformers, surge arresters and line poles. The procedure is an extension of a Monte Carlo-based approach developed for a single straight overhead line to the case of a more complex distribution netw...
متن کاملDesigning Concept on Lightning Protection of Overhead Power Distribution Line
The principle is shown for lightning protection of power distribution lines taking the effects of surge arresters, overhead ground wires and their combined use into consideration. Moreover an outline of a rational design method targeting direct lightning hits, induced overvoltages and backflow currents from high structures.
متن کامل