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 98
- Downloads 0
СURRENT FILTERING IN A THREE-PHASE THREE-WIRE POWER SYSTEM AT ASYMMETRIC SINUSOIDAL VOLTAGES
Purpose. Investigation of the optimal current distribution between source, shunt active filter and reactive compensator of a three-phase three-wire system that provides consumption of a sinusoidal symmetric current under...
INTENSITY SETTER FOR A DEVICE OF SMOOTH START OF SUBMERSIBLE PUMP ELECTRIC MOTOR
Purpose. Development of an intensity setter, which in a rational law changes the opening thyristor the voltage regulator and effectively to changing power supply voltage stator windings of the electric pump deepening, en...
TECHNICAL AND ECONOMIC ASPECTS OF ELECTRIC MACHINE INDUSTRY DEVELOPMENT WITH ACCOUNT OF ELECTRIC POWER DEVELOPMENT DIRECTIONS
A critical assessment of the existing views on the world energy development prospects is an integral part of independent policy elaboration in this field for any state. Consideration of prospective power industry develop...
EXPERIMENTAL STUDY OF PROCESSES IN AN ATTRACTIVE-SCREEN INDUCTOR SYSTEM UNDER ADDITIONAL COIL INSERTION
The article is devoted to experimental investigations of action of an additional coil inserted inside an inductor system with an attractive screen on induced current distribution in the work-piece and to determination of...
AN ANTHOLOGY OF THE DISTINGUISHED ACHIEVEMENTS IN SCIENCE AND TECHNIQUE. PART 41: COMPOSITE MATERIALS: THEIR CLASSIFICATION, TECHNOLOGIES OF MAKING, PROPERTIES AND APPLICATION DOMAINS IN MODERN TECHNIQUE
Purpose. Preparation of brief scientific and technical review about the state, achievements and prospects of development of works domestic and foreign scientists-specialists on materials and technologists in area of deve...