СТАБІЛІЗАЦІЯ АМПЛІТУДИ СТРУМУ ДРУГОЇ ГАРМОНІКИ В ЗАХИСТІ ВІД ОБРИВУ ПРОВОДІВ ПЛ 0,38 кВ

Abstract

The task of the protection improvement from wires break of overhead transmission line with voltage 0,38 kV is considered. The protection is founded on superposition of three-phase currents system of second harmonic on the transmission line with the help of sources, included in the end. The schemes of onesemiperiod rectification are used as sources. The analysis of transmission line load on currents symmetry of these sources is shown. A scheme of second harmonic current source with stabilization of his amplitude is offered. The correlations for calculation of its parameters are shown. It is shown minimum current deviations will be at the stabilization voltage equal 280 V..