SU762697A1 - Device for melting ice glaze - Google Patents

Description

The invention relates to electro. power industry and can be used in electrical networks located in the icy regions of the region ”

A device for melting ice, containing a Converter, to the DC terminals of which are connected wires of a heated overhead power line is known. ”

This device has a limited length of heated line. ”

The closest in technical essence is a device for melting ice, on the phase conductors of overhead power lines, containing a converter, the AC output of which is connected to

2

a converter, the AC leads of which are connected to the mains, and each of the DC terminals is connected to one of two wires of the heated overhead transmission line, which are connected at the opposite end, which differs from me by the fact that the third wire heated overhead power line is connected to one of the AC terminals of the converter, and at the opposite end of the converter it is connected with the two mentioned wires of the heated line ”

2 "The device according to claim 1, about tl and - with the fact that a capacitor is included in the dissection of the third wire of the heated overhead power line"

mains, and each of the DC terminals is connected to one of the two wires of a heated overhead transmission line, which are connected at the opposite end.

The use of the known device allows the melting of ice with direct current not two wires of the heated power line. The magnitude of the direct current melting depends on the magnitude of the rectified voltage of the Converter and the resistance of the heated circuit "In some cases, the value of the direct current is insufficient for melting the ice in the shortest possible time"

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762697

The aim of the invention is to reduce the time of melting the ice "

This goal has been achieved in a device for melting ice on the phase conductors of overhead power lines, which contains a converter whose alternating current leads are connected to the supply mains, and each of the direct current leads is connected to one of the two wires of the heated overhead power line that are at the opposite end merged. " *. ..... „

New in this device is the fact that the third wire of the heated overhead power line is under the “KChCHON” to one of the AC terminals of the converter, and at the opposite end it is combined with the two ₂ θ hot wires of the heated line. ”

In raslechku third wire heated overhead lines e'lek't'r <eyrededachi can be included capacitor ⁴ "'

Fig. '' 1 shows a device 25 for melting a golder, in which the third wire of a heated overhead transmission line is connected to one of the alternating-current terminals of the converter, and at the opposite end of the heating line is connected to the other two. Gimi wires of the mentioned line "

On fig "2 there is a device for melting ice, in which capacitor" 35 is turned on in the dissection of the third wire of the heated Line.

The device (FIG. 1) contains a converter 1, the AC outputs 2 of which are connected to the supply network, and each of the DC terminals 3 is connected to one of the two wires ⁴⁰ 4, 5 of the heated overhead transmission line, which are connected at the opposite end ”Third wire b of the heated line is connected to one of the AC outlets 2 of converter 1, and at the opposite end of the heated overhead transmission line are connected by two wires 4 and 5 of the said line ”

Ice melting in the device of FIG. "1 'is performed simultaneously on two

wires 4 and 5 of the heated line after energizing the alternating current 2 terminals of the converter 1 “A constant ⁵⁵ current flows through wires 4 and 5, caused by the action of DC

the voltage of the converter 1, as well as (alternating current, due to the connection of the third wire 6 to one of the alternating current terminals 2 of the converter 1 "Only alternating current flows through the wire 6" Since the resistance of the wires to alternating current considerably exceeds the resistance of direct current, current flowing under the action of an electromotive force, the network supplying the inverter 1, will be less than direct current. ”As a result, the presence of a converter does not affect the value of current "flows through the inverter unidirectional pulsating current" Alternating current flowing through the wires 4 and 5, the same uo magnitude but out of phase "This leads to the fact that the currents in the wires 4 and 5 have the same current value"

Connection to one of the AC outputs 2 of the converter 1 of the third wire 6 causes a change in the shape of the supply currents of the converter 10, however, the average value: the current in each phase is zero ”

The device (FIG. 2) contains a capacitor 7 included in the dissection of the third wire 6 of the heated overhead transmission line. ”Turning on the capacitor 7 reduces the AC resistance of circuits consisting of wires 6 and 5, as well as 6 and 4” As a result, the alternating current increases flowing through wires 4, 5, 6 under the action of the electromotive force of the network supplying converter 1, as well as the effective value of melting currents in wires 4 and 5 "· · ·

The use of the proposed devices for melting ice can increase the effective value of melting currents and, consequently, reduce the melting time. ”Reducing the melting time leads to a decrease in the undersupply of electricity to consumers, which are turned off according to the conditions of assembly of the heated circuit”. configuration of the electrical network will be tens of thousands of rubles

762697

FIG. Ζ

Claims (1)

1. DEVICE FOR FLOATING "Hollow on the phase conductors of overhead power lines, containing