INFLUENCE OF CORONARY DISCHARGE PARAMETERS ON THE EFFICIENCY OF LIGHTNING PROTECTION SYSTEM ELEMENTS
Journal Title: Електротехніка і Електромеханіка - Year 2017, Vol 0, Issue 3
Abstract
Purpose. Investigation of the formation of space charge in the region of the apex of lighting rod, under the action of the electric field of a thunderstorm cloud, to evaluate the efficiency of elements of lighting protection systems. Methodology. We have applied the mathematical simulation of electromagnetic field distribution on the top of metal rod by different forms. As a mathematical apparatus, we use the finite element method. We considered two forms of the rod section: round and square. The round (cylindrical) rod has a sharp apex. The square rod has a flat top. The experimental study investigates the features of corona discharge formation. A high-voltage test equipment is created an electric field. Experiments carried out using a configuration consisting a potential plate and vertical rod electrode on grounded plate. The electric field strength varied from 1 kVm-1 to 100 kVm-1. This range corresponds to the thunderstorm condition. Results. We have obtained a correlation between the corona current and the strength of the electric field for various shapes of the rod top. The results of experimental studies confirmed the correctness of the conclusions of theoretical estimates. We show that the time parameters of streamer current pulses vary by no more than 30%, but a streamer charge increase to three time with increasing electric field strength. We proposed and applied a method for measuring the velocity of motion of a streamer in the discharge gap. As a result, it is established that the streamer speed is nonlinear in time. For a discharge gap of 1.2 m, the speed varies from 1.8∙104 m/s to 1.1∙106 m/s. Originality. For the first time, we have carried out a complex of studies of corona discharge parameters from lightning protector rod to apply for the certification procedure of ESE terminals. Practical value. Based on the set of obtained results, it is obviously that the standard NF C 17-102:2011 will not be introduced as a national standard of Ukraine before full introduction of scientifically justified data will be include into the requirements of the standard.
Authors and Affiliations
A. Yu. Chernukhin
Keywords
Related Articles
- EP ID EP292829
- DOI 10.20998/2074-272X.2017.3.07
- Views 94
- Downloads 0
ONLINE TECHNOLOGICAL MONITORING OF INSULATION DEFECTS IN ENAMELED WIRES
In this paper the authors used non-destructive technological monitoring of defects insulation enameled wire with poliimid polymer. The paper is devoted to the statistical method for processing, comparison and analysis of...
MANAGING THE LOAD SCHEDULE OF THE ADMINISTRATIVE BUILDING TAKING INTO ACCOUNT EMERGING RISKS WHEN CONNECTING THE KINETIC ENERGY STORAGE TO THE POWER SUPPLY SYSTEM
Purpose. The purpose of the paper is to analyze load schedules of the administrative building and develop a structural scheme for connecting the kinetic energy storage in the power supply system of this building, which w...
MASS AND COST FIGURES FOR SPATIAL AXIAL THREE-PHASE ELECTROMAGNETIC SYSTEMS WITH CIRCULAR AND HEXAGONAL FORMING CONTOURS OF TWISTED MAGNETIC CORE RODS
For a spatial three-phase axial electromagnetic system with double-contour phase elements of the twisted butt-end magnetic core, analytical dependences for optimal geometrical relations determination over minimum active...
ESTIMATING THE LIMIT POSSIBILITIES OF THE STEP CHARGING SYSTEM FOR CAPACITIVE ENERGY STORAGE
The aim of the article is to estimate the limit possibilities of step-by-step charging the capacitive energy storage which are caused by the achievement of a balance among the processes of the receiving and losing of ele...
AN ANTHOLOGY OF THE DISTINGUISHED ACHIEVEMENTS IN A SCIENCE AND TECHNIQUE. PART 24: SUBJUGATION OF EARTHLY DRY LAND AND WORLD OCEAN
A short essay of world history of subjugation and study by humanity of earthly continental dry land and enormous marine spaces of Earth is presented.