RU98305U1 - INFORMATION TRANSMISSION DEVICE - Google Patents

Abstract

 An information transmission device comprising a transmitter, a communication line, a receiver, communication transformers, communication capacitors, voltage transformers, a transmitter output and a receiver input through communication transformers, communication capacitors and voltage transformers are connected to a communication line, the role of which is played by a high-voltage power transmission line, characterized in that the communication transformer is included in the phase gap of the secondary winding of the voltage transformer and the communication capacitor is connected in parallel after the communication transformer activities of electricity consumers.

Description

The utility model relates to communication technology and can be used to transmit telemetric information via high voltage power lines.

Known devices for transmitting information containing an information signal transmission unit and an information signal receiver unit connected via two voltage transformers to a high voltage power line (see, for example, descriptions of inventions to patents US 2307771, C1 177-353, publication date 1/16/1940; RU 2221333, IPC 7 Н04В 3/54, publication date January 10, 2004; RU 2115238, IPC 6 Н04В 3/54, publication date July 10, 1998; description of the invention to the USSR copyright certificate 811502, IPC 3 Н04В 3/56, H02J 13/00 , date of publication 07.03.1981; description of utility model for patent RU 86824, IPC Н04В 3/54, date p Publications 10.09.2009).

The main disadvantage of similar devices is the lack of safety during operation, due to the need to connect voltage transformers to a high-voltage power line through a high-voltage isolation capacitor.

The closest analogue of the claimed technical solution is an Information Transmission Device comprising an information signal transmission unit and an information signal receiver unit connected via two voltage transformers to a high-voltage power line (see, for example, utility model description to patent RU 86824, IPC Н04В 3/54, date publication September 10, 2009).

The disadvantage of the closest analogue is the limitation of the use in cases where in the low voltage network there is no grounding of the neutral wire or the neutral wire is grounded in several places.

The purpose of the claimed technical solution is to ensure the safety of connecting to a high-voltage power line as a communication line through step-down transformers of electricity consumers without making changes to the power supply system, regardless of the neutral grounding mode in the low voltage electric network.

The technical result consists in improving the quality of communication and the safety of connecting to a high-voltage power line as a communication line through step-down transformers of electricity consumers without making changes to the power supply scheme, regardless of the neutral grounding mode in the low voltage electric network.

The essence of the utility model is expressed in the fact that the output winding of the communication transformer is included in the phase-wire gap between the step-down voltage transformer and electric consumer devices, and the communication capacitor is installed after the communication transformer in parallel with electric consumer devices, and differs from the closest analogue in that the conditions for the signal to pass stored regardless of the presence of grounding of the neutral wire. The presence of a coupling capacitor reduces the influence of possible interference from devices of consumers of electricity, as well as the inverse effect of the transmitter signal on the operation of devices of consumers of electricity. Due to the flow of HF current through the secondary winding of a step-down voltage transformer, there is a transformation of the transmitted signal in the voltage transformer and an increase in signal power in the communication line, which allows to increase the communication range.

The essence of the utility model is illustrated by the drawing, which shows the electrical diagram of the connections.

The information transmission device comprises a transmitter (1) and a receiver (9) connected via communication transformers (2, 7), communication capacitors (3, 8) and power voltage transformers (4, 6) to a high voltage power line (5) used in quality of the communication line between the transmitter (1) and the receiver (9). As voltage transformers (4, 6) step-down voltage transformers are used, through which devices of consumers of electricity are connected. The output of the transmitter (1) is connected to the voltage transformer (4) through a communication transformer (2), included in the phase wire break, and a communication capacitor (3), connected after the communication transformer between the phase wires in parallel with the devices of electricity consumers. The input of the receiver (9) is connected to the voltage transformer (6) through a communication transformer (7), included in the phase wire break, and a communication capacitor (8), connected after the communication transformer between the phase wires in parallel with the devices of electricity consumers. Thus, the connection of the transmitter (1) and receiver (9) with the power line is carried out not only by means of a “stray” capacitance between the primary and secondary windings of power transformers (4, 6), but also by mutual inductance of the windings of power transformers (4, 6).

The device operates as follows. The signal from the output of the transmitter (1) by means of a communication transformer T1cv (2) excites high-frequency electrical oscillations in the circuit formed by the secondary winding of the communication transformer, the coupling capacitor (3) and the secondary winding of the power transformer T1 (4). The signal in the power line is excited due to the “parasitic” capacitance between the primary and secondary windings of the power transformer T1, as well as due to the mutual inductance of the windings of the power transformer T1. Electromagnetic vibrations propagate along the power line and due to this, a signal is excited through a power transformer T2 (6) and a communication transformer T2sv (7) at the input of the receiver (9), the law of change of which repeats the law of change of the signal at the output of the transmitter. Further, this signal is processed in the receiver in the usual way.

The claimed information transmission device was tested in real conditions on the power line of the enterprise of KazTransOil JSC of the Republic of Kazakhstan, where it was used to create a communication channel as part of the existing telemetry system. The tests showed high reliability and range of communication provided with this device, improving the reliability and safety of the information transmission device when using a high-voltage power line as a communication line.

Claims (1)

An information transmission device comprising a transmitter, a communication line, a receiver, communication transformers, communication capacitors, voltage transformers, a transmitter output and a receiver input through communication transformers, communication capacitors and voltage transformers connected to a communication line, the role of which is played by a high-voltage power line, characterized in that the communication transformer is included in the phase gap of the secondary winding of the voltage transformer and the communication capacitor is connected in parallel after the communication transformer activities of electricity consumers.