RU2714195C1 - Power line communication device - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: invention can be used in the field of electrical equipment for arrangement of communication channels between network devices using power transmission lines (PTL) with voltage of up to 35 kV inclusively. Power line communication device comprises a connector assembly connected to the transmission line phase, a power module which is connected to the output of the connector assembly consisting of a series-connected mains filter and a power connector, a transceiving module with digital interfaces. Device additionally includes voltage converter consisting of series-connected high-voltage capacitor, voltage sampling transformer and voltage stabilizer, and an attachment module consisting of a coupling capacitor and a high-pass filter, in parallel to which a voltage limiter is connected, wherein a connection module is connected in parallel to the connector assembly, to which a transceiving module is connected, and a voltage converter to which the power module is connected.

EFFECT: wider field of use.

1 cl, 1 dwg

Description

The present invention relates to electrical communication technology, and in particular to systems for transmitting information, and to systems for transmitting high-frequency signals over industrial frequency electrical networks, and can be used to organize communication channels between network devices using power lines (power lines) up to 35 kV inclusive.

A transmission line information transmission device is known (“A device for transmitting information on the phase conductors of power lines” patent for invention No. 2260910 C2, IPC Н04В 3/54) containing HF barriers included at the ends of the power line to break the phase wire, an information transmission channel is formed a chain of series-connected seal equipment, an attachment filter, a coupling capacitor at the first end of a power line, a phase wire and series-connected coupling capacitor, an attachment filter and an apparatus compaction tours at the other end of the power line, with each of the RF traps containing two inductors, two capacitors, an RF matching transformer and a matching capacitor, each connection filter contains two inductors and three capacitors.

However, this device is applicable only on 6 kV lines, which significantly narrows the scope. In addition, in this invention, the transceiver uses narrowband modulation, which significantly reduces the data transfer rate, which is a serious drawback.

In addition, a power line communication device is known which is a prototype of the present invention (“Power line communication device containing an AC power outlet” Patent for the invention No. 2584154 C2, IPC Н04В 3/54), including a connector assembly containing at least three first connectors, wherein one of the at least three first connectors is used to connect the ground; a power module consisting of a mains filter with at least three first ports, at least three second ports, at least three filter circuits, one of which is a ground filter circuit, and a low-pass filter that includes a filter element in each of said at least three filter circuits, wherein each first port is electrically connected to one of the first connectors, each filter circuit is provided between one of the first and one of the second ports, and the low-pass filter includes and inductive and capacitive blocks, configured to filter low pass frequencies on said at least three filter circuits, and inductive and capacitive blocks are symmetrically located among said at least three filter circuits, each of said at least three filter circuits being connected by a capacitive coupling with each other of the at least three filtration circuits, as well as a power outlet containing at least three second connectors, each second electrical connector metrically connected to one of the second ports, one second connector serves to connect the ground; a transceiver module electrically connected to each of the first ports, wherein the transceiver module is capable of transmitting and / or receiving data in accordance with a transmission method that uses more than one transmission channel between two devices connected by wires of a power line.

However, this device is intended for distribution networks with a voltage of 0.4 kV, which makes it impossible to use this technology on high voltage lines, which is a disadvantage, since it limits the scope of the proposed device.

The task (technical result) of the invention is to expand the scope of the device.

This object is achieved by the fact that in the inventive communication device for power lines, which contains a connector assembly connected to the power transmission line phase, a power module that is connected to the output of the connector assembly, consisting of a series-connected line filter and a power connector, a transceiver module with digital interfaces, moreover, a voltage converter, which consists of a series-connected high-voltage capacitor, a voltage selection transformer and a stub, is additionally introduced into the device recuperators voltage, and connecting the module, consisting of a coupling capacitor and a high-pass filter, which is connected parallel to the voltage limiter, while the node connectors are connected in parallel connection of the module, which is connected to the transceiver module, and voltage converter connected to the power module.

The drawing shows a structural diagram of a communication device for power lines.

The block diagram of a power line communications device (see drawing) consists of a connector assembly (1), a voltage converter (2) indicated by a dotted line in the drawing, including a high voltage capacitor (3), a voltage selection transformer (4), and a voltage stabilizer ( 5), as well as the power module (6), indicated in the drawing by a dotted line, which in turn consists of a power filter (7) and a power connector (8), in addition, the device includes an access module (9), and the same transceiver module (10).

The connector unit (1) performs the docking function between the phase conductors of the line and the connection circuits to the connection device (9) and the voltage converter (2). In the case of a high-voltage line, the connector assembly (1) can be made in the form of insulators.

The voltage converter (2), consisting of a high-voltage capacitor (3), a voltage selection transformer (4) and a voltage stabilizer (5), allows you to directly power the PLC module, which is part of the transceiver module (10), and external devices.

The power module (6), consisting of a power filter (7) and a power connector (8), allows you to connect the power circuit of both external devices and the transceiver module (10), in addition, the module in question improves the quality of PLC transmission, suppressing the interference that creates external devices, and reducing spurious PLC radiation.

The connection device (9) contains a high-voltage capacitor and a connection filter connected in series, in parallel with which a voltage limiter is connected. This module matches the high-frequency output of the transceiver module (10) with the line, while performing the function of protecting the module from high voltage.

The transceiver module (10) performs the function of converting a digital signal to analog and vice versa. This module analyzes the signal received from a similar module on the other side of the line, and then sends a response signal, thereby organizing a communication channel between devices. The module under consideration can consist of a broadband PLC module, an analog-to-digital and digital-to-analog converter, digital filters, a built-in amplifier with automatic gain control, an analog signal modulator-demodulator, as well as various digital data transmission interfaces.

The main functions of the proposed device is the organization of a high-speed communication channel over power lines with voltage up to 35 kV inclusive.

The device operates as follows. The transceiver module (10) generates a low-voltage, high-frequency (HF) modulated signal in the megahertz range and is transmitted through an attachment device (9) and then through a connector assembly (1) to one of the phases of the transmission line. At the opposite end of the line, a similar device receives the received signal, analyzes the received information, and sends the response signal. Thus, a communication channel between the two proposed devices.

If it is necessary to transmit information on two or three phases of the power line, it is necessary to install in series for each additional phase a series-connected connection module (9) and a transceiver module (10) that will be connected through the connector assembly (1) to the corresponding phase of the line.

The power function of the transceiver module (10) is carried out in the aggregate voltage Converter (2) and the power module (6). The voltage from one of the phases of the line through the connector assembly (1) is supplied to the input of the voltage converter (2), at the output of which we obtain an alternating current voltage of 220 V, which is supplied to the power module (6) from which the power distribution of external devices and the transceiver module is distributed ( 10).

The technical result of the communication device for power lines is to expand the scope due to the possibility of using the device in the networks of overhead and cable power lines, both low and high voltage (from 0.2 to 35 kV inclusive).

Thus, due to the introduction of a connection module and a voltage converter into the design of the proposed device, the organization of a communication channel via power lines has become possible not only in low voltage networks, but also in high voltage up to 35 kV inclusive.

Claims (1)

A power line communication device that contains a connector assembly connected to a power line phase, a power module that is connected to an output of a connector assembly, consisting of a series-connected line filter and a power connector, a transceiver module with digital interfaces, characterized in that the device is additionally introduced a voltage converter consisting of a series-connected high-voltage capacitor, a voltage selection transformer and a voltage stabilizer, and a connection module eniya consisting of a coupling capacitor and a high-pass filter, which is connected parallel to the voltage limiter, while the node connectors are connected in parallel connection of the module, which is connected to the transceiver module, and voltage converter connected to the power module.

Images