RU1779U1 - HIGH VOLTAGE ELECTRIC TRANSMISSION DEVICE FOR DISCRETE SIGNALS ON WIRES - Google Patents

Abstract

DEVICE FOR TRANSFER OF DISCRETE SIGNALS BY WIRES OF HIGH-VOLTAGE ELECTRIC TRANSMISSION LINES, containing a source of telemechanical information connected to the apparatus, converting a discrete signal into a high-frequency frequency-modulated, characterized in that the apparatus that converts a high-frequency module into a modulated digital signal, frequencies.

Description

DEVICE FOR TRANSFER OF DISCRETE SIGNALS ON WIRES OF ELECTRIC TRANSFER LINES OF HIGH PIN: 5Е№М

The utility model relates to techniques for electrical communications and can be used to transmit discrete information on power lines.

A device for receiving and transmitting information in high voltage distribution networks, comprising a command generation unit connected via tonal generators to the channel-forming part of the equipment / 1 /. This device uses the frequency principle of transmitting telemechanical information. Such equipment is complicated in execution and has small technological capabilities. Currently, the most widely used equipment for transmitting telemechanical information using the time principle, which expands technological capabilities in terms of using the frequency spectrum, as well as in the amount of information transmitted. A device is known for transmitting information via wires of a high-voltage power line using the time principle, selected as a prototype and containing a transmitting device that converts signals inm H 04B 3A4

formations of the tonal frequency spectrum into a high-frequency signal. The source of telemechanical information in such a device is connected to the input of the low-frequency modem transmitter for converting DC pulses carrying discrete information into a frequency-modulated signal located in the tonal frequency range. This signal is fed to the input of the balanced modulator of the OBP unit / one sideband /, which forms single-band signal of high frequency / 2 /. 3 of this device, the conversion of a telemechanical signal to a high-frequency signal occurs in two stages, which explains the complexity and relatively high cost of the equipment, the complexity of its obsolescence and repair.

The inventive device for transmitting discrete signals through the wires of high-voltage power lines solves the problem of simplifying the equipment, significantly reducing its cost and ease of maintenance and repair due to the one-stage conversion of the telemechanical signal into a high-frequency one. The device contains a source of telemechanical information connected to equipment that converts a discrete signal into a high-frequency frequency-modulated. New is that the equipment that converts a discrete signal into a high-frequency frequency-modulated, made in the form of a programmable frequency divider.

The implementation of equipment that converts a discrete signal into a high-frequency frequency-modulated one, in the form of a programmable frequency divider, provides a one-step conversion of the DC telemechanical | 5 signal to a high-frequency frequency-modulated one, which greatly simplifies and cheapens the equipment. In addition, with a single-stage formation of a telemechanical signal into a high-frequency frequency-modulated signal, an expensive filter with a good amplitude-frequency characteristic is not required.

Ha the drawing shows a schematic cxebia device.

The device consists of a sensor 1 of telemechanical information connected to a programmable divider 2 frequencies with a generator 3 of the reference frequency. The divider 2 through a band-pass filter 4 is connected to the amplifier 5 and through the corresponding node 6 of the connection is connected to the transmission line / power transmission line /.

The device operates as follows.

The sensor 1 produces a discrete signal in the form of pulses of direct current, which is fed to the input of the frequency divider 2. A frequency divider 2 divides the frequency of the reference oscillator 3 into two frequencies corresponding to O and 1. When a logical signal O arrives, divider 2 is put into a division state with a coefficient / g, when a logical signal arrives. 1 divider 2 translates to

division state with coefficient / .. As a result, two high-frequency signals appear at the output of divider 2:

/ g -. / g f

 : / y

where; - the frequency of the reference oscillator 3. At the output of the divider 2, a sequence of rectangular pulses arises, which can be mathematically written in the form of a signal containing a number of sinusoidal harmonics: first, second, ..th, of which the first harmonic is useful. Isolation of the first harmonic signal does not present significant difficulties, therefore, the bandpass filter 4 will not be expensive. The signal allocated to the bands by the filter 4 is fed to the input of the power amplifier 5 and then through the node 6 in the power transmission line

Using the inventive device allows you to save material and financial resources when creating equipment for transmitting telemechanical information via wires of high voltage power lines.

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USEFUL MODEL FORMULA

A device for transmitting discrete signals over a wire of 1 liter of high-voltage power lines, containing a telemechanical information source connected to equipment that converts a discrete signal into a high-frequency frequency-modulated, characterized in that the equipment that converts a discrete signal to a high-frequency frequency-modulated, is made in the form of a programmable frequency divider .

Sources of information.

1.Aut.St.SSSSR J 720744, ZhSh N 04 VZ / 54, 1976

2. High-frequency communication equipment according to Ш type АЗС-1 and АВС-3. Regulatory and technical material of shower design and survey and research work 14 / 4-86. Energy network project. M., 1986

Authors: / - .I. Ryabchikov

.and.:

I.A. Vitkovsky

Claims (1)

DEVICE FOR TRANSFER OF DISCRETE SIGNALS BY WIRES OF HIGH-VOLTAGE ELECTRIC TRANSMISSION LINES, containing a source of telemechanical information connected to the apparatus, converting a discrete signal into a high-frequency frequency-modulated, characterized in that the apparatus that converts a high-frequency module into a modulated digital signal, frequencies.