SU1100671A1 - Device for taking off power from line with split wires - Google Patents

Abstract

1 A device for selecting a power from a line with split wires containing a ferromagnetic core with an inductance is distinguished by the fact that, in order to increase reliability, a second ferromagnetic core with an inductance compensator, a compensator, an asymmetry compensator, and an ascent symmetry adapter are also introduced into the core, and a tease symmetry adapter is added to the adapter. ferromagnetic cores with inductors are fixed on the split phase pacnopKcix symmetrically relative, and the terminals of the coils are connected to the corresponding inputs of the differential bl The output of which is connected to the input of the rectifier through an asymmetry compensator, two compensating coils of which are inductively coupled to the corresponding inputs of the differential unit and the dual output of the rectifier are feedback connected to the compensator, and the third is the output of the device.

Description

2, the device according to claim 1, of which the differential unit, the asymmetry compensator and the rectifier are placed in a metal ball reinforced along

the axis of the split phase between two parallel struts, and the gap between the walls of the ball and the blocks placed in it should not be less than 1/6 of the ball’s radius.

one

The invention relates to electrical engineering and can be used to provide power to devices located predominantly within split phases for alternating current.

When creating paths for transmitting information through wires of a split phase over long distances, it is necessary to install intermediate amplifiers.

The amplifiers are installed at a certain interval along the path at a certain distance from the phase conductors and are powered by current transformers placed on the phase conductor. A device is known for producing direct current voltage from a high voltage line (HVL) of high voltage alternating current transmission, which contains connecting lines, protective blocks, partitioned buses, which are connected to direct current voltage block 13 through connecting lines and protective blocks.

However, connecting lines and protection units are bulky and expensive equipment that requires a mandatory fence and an alarm system. Despite the complexity, this device does not provide a stable and constant supply voltage.

Closest to the proposed technical entity is a power take-off device for overhead lines, containing a ferromagnetic core with an inductance coil, the ends of which are connected to the consumer, and the overhead line 23 wire passes through an opening in the expanded part of the core.

The disadvantage of this device is the relatively low reliability of power supply when selecting masses from a split-phase EL, since the magnitude of the current and voltage in the adjacent phases and the zero-sequence current, the influence of the arrangement of the wires of its phase, the dependence of the current in phase wiring

from the geometrical position of the ferromagnetic core with the coil relative to the split phase. In addition, using this device can not power radio equipment located.

inside the split phase.

The purpose of the invention is to increase reliability.

This goal is achieved in that the device for taking power from a line with split wires, containing a ferromagnetic core with an inductance coil, further comprises a second ferromagnetic core with an inductance coil, a differential unit, an asymmetry compensator and a rectifier, while the ferromagnetic core with inductors are strengthened on the spacers of the split phase is symmetrical about the center, and the KaTjmieK terminals are connected to the corresponding inputs of the differential unit, the output to It is connected to the rectifier input through an asymmetry compensator, two compensating coils of which are inductively coupled to the corresponding inputs of the differential unit, two rectifier outputs being feedback connected to the compensator, and the third is the output of the device, in which the differential block, the asymmetry compensator and The rectifier is placed in an etallic ball, reinforced along the axis of the split phase, between two parallel struts, with this gap between the walls of the ball and the blocks placed into it should be at least 1/6 of the radius of the ball.

Fig. I shows a device for taking power from an overhead line; in fig. 2 - placement of the device on the split phase ..

The device contains two ferro. magnetic cores 1 and 2 with inductors 3 mounted on them and differential block 5, symmetry compensator b and rectifier 7. Ferromagnetic cores 1 and 2 with inductance coils 3 and 4 are mounted on spacers 8 of the splitted phase symmetrically relative to the center. The leads of the inductance 3 are connected to the input 9, and the leads of the inductance 4 to the input 10 of the differential unit 5, the output 11 of which is connected to the input of the rectifier 1 7 through the asymmetry compensator 6. The compensation asymmetry KaTymkH 12 and 13 of the asymmetry compensator are inductably connected to the inputs and 10. The shots 14 and 15 of the rectifier 7 are feedback-connected to the corresponding inputs of the compensator b, and the third output 16 is the output of the device.

The differential unit 5, the asymmetry compensator 6 and the rectifier 7 are placed in a metal ball 17 reinforced along the axis of the split phase between two parallel struts (the second one is not shown),

The device works as follows.

When the location of the ferromagnetic cores 1 and 2 with coils 3 and 4, the number of turns is not. equal to each other Hg, symmetrically relative to the center, in the coils 1 and 3 and 4 the emf is induced due to the electromagnetic field of the wires of the phase. The magnitude of the emf is proportional to the number of turns in the coils, and the difference in the emf induced in the coils is proportional to the difference in the turns and does not depend on the change in the current and voltage on the wires of the split phase. Since ferromagnetic cores 1 and 2 with coils 3 and 4 are located inside the split phase, this device completely eliminates the influence of external electromagnetic fields, vkdcha and electro: the adjacent field's gnite field, on the formation of the resulting EMF, which ensures property of its level.

In order to obtain a voltage of a relatively large size, the outputs of coils 9 and 10: according to, are connected to the inputs of the differential blocks 5, at No. 1. whose differential voltage is obtained (), which is given

to the input 11 of the mismatch compensator 6, where simultaneously the compensation voltage is supplied through the compensation coils 12 and 13

From the shoulders of the differential block 5. Moreover, from outputs 14 and 15 of rectifier 7 to block 6 a constant voltage is supplied, which, together with the voltages of windings 12 and 13, compensates for the unbalanced part of the voltage of the differential block 6. This compensation is necessary, as in a line, asymmetry may occur due to sagging of wires, formation of a hollow-eater, violation of the integrity of the struts

and other cases of phase failure.

° With a significant asymmetry of the electromagnetic field in the plane perpendicular to the phase cross section (breakage and sticking of wires, output 13, spacers, etc.), the device must be protected from strong electromagnetic fields by the room of all the elements of the device ((Except for ferromagnetic cores with coils ) into the metal ball. In this case, the distance between the elements of the device and the walls of the ball 17 must be at least 1/6 of the radius of the ball 17, which ensures that the space occupied by the device is electromagnetic go field close to, O for any value of the external electromagnetic field.

For any kind of asymmetry of the phase of an overhead line at the output of the asymmetry compensator 6, we obtain the following voltage level, which is fed to the rectifier input.

Straightening is carried out by any rectifier with a full-wave straightener circuit and stabilization of the constant voltage.

The proposed device can be widely used for powering electronic devices that are advisable to be placed inside the split phase. At the same time, the stability, stability and reliability of the device is determined by the reliability of overhead lines.

Claims (2)

D. A DEVICE FOR TAKING POWER FROM A LINE WITH SPLITTEN WIRES, comprising a ferromagnetic core with an inductor, characterized in that, in order to increase reliability, a second ferromagnetic core with an inductor, a differential block, an asymmetry compensator and a rectifier, are additionally introduced into it In this case, ferromagnetic cores with inductors are mounted on spacers of the split phase symmetrically with respect to the center, and the output of the coils are connected to the corresponding differential inputs of the second block, the output of which is connected to the input of the rectifier through the asymmetry compensator, two compensation coils of which are inductively connected to the corresponding inputs of the differential block, moreover, the two outputs of the rectifier are connected by feedback to the compensator, and the third is ^{: the} output of the device. 2. The device pop. 1, characterized in that the differential unit, the asymmetry compensator and the rectifier are placed in a metal ball, fixed along the axis of the split phase between two parallel struts, while the gap between the walls of the ball and the blocks placed in it must be at least 1/6 the radius of the ball.