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The power transmission line (TL) designer is faced with the problem of the possible corona discharge firing voltage assessment on the basis of the simple relationships, the designer should have the clear idea of the basic characteristics of the corona discharge, their dependences on the wire design and the bundle availability as well as the mutual influence of the present parameters. The model of...
In high-voltage electric power systems current-limiting devices are applied to limit a fault current levels, among those current-limiting reactors are extensively applied. In the comprehensive design a particular attention is paid to winding design. Generally, winding is performed using a few parallel wires (branches). The transition between horizontal rows is based on a specific algorithm referred...
At present current-limiting reactors are widely used in order to limit levels of fault currents in electrical networks. Reactor being an element of power system must be able to operate reliably under nominal and fault conditions. Main attention in the paper is focused on calculation method of reactor, operating under nominal condition. A comprehensive approach to calculation of a design of dry type...
Suspension insulator string is widely used as insulator structures in high voltage overhead power lines. Power frequency voltage of feed line is distributed along string elements in unequal amounts due to parasitic capacities (on ground and wire). Grading rings arrangement close to current-conducting elements is one of the most effective ways for voltage grading. The results of investigation of voltage...
While in operation cathode spot of vacuum arc spouts plasma jets, liquid metal drops and splashes [1]. Plasma jets velocity comes up to ∼106 m/s, liquid metal drops velocity comes up to ∼104 m/s. Meanwhile, for many years researches take continued interest to the problem of pure plasma production [2], it is connected with practical application of vacuum discharge in the process of filming during cathode...
Today Enterprise Asset Management (EAM) is one of the main problems for grid companies in Russia. After the collapse of the USSR electrical substation are owned by energy companies. In the USSR equipment maintenance was carried out using the planned preventive maintenance system but it is economically inefficient in the current market conditions. Therefore today to solve the equipment technical state...
This paper addresses the problems, connected with calculation of the electric field and analysis of surface flashover of node tank SF6 circuit breaker. Namely, the gap between the grounded tank unit, a filter system and a conductive system is receiving input power. The paper also provides the recommendations for change SF6 circuit breaker design.
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