SYSTEM OF PERFORMANCE TESTING FOR LIGHTNING TRAVELING WAVE IN POWER TRANSMISSION LINE

摘要

FIELD: electricity.;SUBSTANCE: system of performance testing for lightning traveling wave in the power transmission line consists of the device for dynamic simulation of lightning electromagnetic transient process in the power transmission line and intelligent monitoring device. Based on the models of power transmission line and groundwire, models of support and its grounding center, as well as insulator model, support is divided into an oblique material segment, traverse segment and the segment of the principal part, at the same time taking into account factors of the insulator, power transmission line and groundwire, and applying the appropriate wave impedance, internal impedance, mutual impedance, intrinsic conduction, mutual admittance and inductance for the modeling and creation of an equivalent circuit of the transition state of a lightning strike. Intelligent monitoring device consists of an analog-to-digital converter with a current sensor and / or voltage sensor for serial cascade connection, single-chip computer, display, or oscilloscope. Distal ground cable and wire signals are measured in the different positions of the system by introducing the surge current, the propagation of lightning wave is analyzed for the entire power transmission line.;EFFECT: optimised section of the power transmission line having weak lightning protection, and lightning protection equipment in the substation brought into line with the result of the analysis.;6 cl, 11 dwg