RU200168U1 - HIGH-FREQUENCY COMMUNICATION DEVICE FOR ELECTRIC POWER LINES - Google Patents

Abstract

The utility model relates to the field of electric power industry and can be applied at power facilities (electrical substations) of all voltage classes, in technological monitoring systems intended for open and closed switchgears (outdoor switchgear and closed switchgear), as well as general substation control points (OCP) of a substation, in order to safety control of technical personnel and / or switching equipment during work in electrical installations of various types and their switching. A high-frequency communication device over power lines, containing a technological observation unit, made with the possibility of decimating frames to reduce their frequency received from a technological surveillance camera, and transmit processed data into a digital high-frequency communication channel. The technical result of the utility model is to ensure the organization of technological supervision at electrical substations through low-speed channels (for example, 9600 bit / s) formed by the equipment th high-frequency communication over power lines, including in simplex mode.

Description

The utility model relates to the field of electric power industry and can be applied at power facilities (electrical substations) of all voltage classes, in technological monitoring systems intended for open and closed switchgears (outdoor switchgear and closed switchgear), as well as general substation control points (OCP) of a substation, in order to safety control of technical personnel and / or switching equipment during work in electrical installations of various types and their switching. Usually, digital high-frequency (HF) communication channels in a narrow frequency band of 4-12 kHz act as communication channels for collecting information from such substations.

To control the position of switchgears in an electrical substation during switching operations using telecontrol, as well as to monitor the absence of personnel near switchgears at the time of switching, technological monitoring can be used using various cameras.

High-frequency communication devices over power lines (for example, communication and telemechanics equipment SSTM "ES100") are known from the prior art, equipped with Ethernet modules that allow transmission of a technological video surveillance stream over local area networks formed with the help of this equipment [1].

The main disadvantage of the organization of technological surveillance (VT) at electrical substations via digital HF communication channels, using these solutions, is the synchronous organization of data transfer protocols, and since the frame refresh rate is fixed and depends on the camera settings, then transmit such information via communication channels, having a transmission rate lower than the required one, even taking into account the presence of compression, is not possible.

The task to be solved by the utility model is the development of a high-frequency communication device over power lines, devoid of the drawbacks of analogues and ensuring the optimization of the transmission of photo and video data from technological surveillance cameras installed at electrical substations, in conditions of using HF communication channels with an extremely limited radio frequency spectrum. and low speed.

The technical result of the utility model is to ensure the organization

technological supervision at electrical substations through low-speed channels (for example, 9600 bit / s) formed by high-frequency communication equipment over power lines, including in simplex mode.

The technical result is achieved due to the fact that the device for high-frequency communication over power lines contains a technological observation unit made with the possibility of decimating frames to reduce their frequency and, as a consequence, reduce the required data transmission rate (up to 9600 bit / s) received from the technological camera. observation, and transmission of processed data to a digital high-frequency communication channel.

It is advisable that the technological observation unit be made with the possibility of compressing and / or cropping the photo and / or video data received from the technological observation camera.

It is advisable that the technological monitoring unit is configured to transmit the processed data to a digital communication channel formed by communication devices over power lines.

The utility model is illustrated by a drawing, where FIG. 1 shows a block diagram of the organization of technological supervision using the utility model, where

1 - surveillance camera;

2 - HF device along power lines with a VT unit;

3 - digital communication channel via power lines;

4 - HF communication device;

5 - device for receiving and displaying data.

In a preferred embodiment, the high-frequency power line communication device comprises a control unit, at least one signal processing unit, at least one power supply unit, at least one linear device unit and at least one power amplifier, and a process monitoring unit.

The technological observation unit is configured to process photo and / or video images received from technological observation cameras installed to view switchgears at an electrical substation, and transmit the processed data to a digital communication channel formed by high-frequency devices.

communication over power lines.

An HF communication device with a technological monitoring unit 2 (according to the utility model), as well as another HF communication device over power lines 4, installed, as a rule, in the dispatch center, form a digital communication channel over power lines 3. To the HF communication device with the unit technological surveillance 2, data from camera 1 is received in the form of photo or video information, for example, via an Ethernet network using the TCP / IP (Transmission Control Protocol / Internet Protocol) and RTSP (Real-Time Streaming Protocol) protocols. A specialized block of technological supervision in the device processes the received information (frame decimation, as well as compression and / or framing) and sends the processed information to digital communication channel 3, for example, using the RS-485 serial interface.

Frame decimation can be performed, for example, by dropping intermediate frames of the H.264 codec during processing and transmitting only reference frames with complete information about the image.

When compressing, the image can be converted from RGB color space to YCbCr, then “decimation” is performed for the Cb and Cr image channels responsible for color, which consists in the fact that each block of 4 pixels of the Y channel is assigned averaged Cb and Cr values ... Further, the luma component Y and the Cb and Cr components responsible for the color are divided into blocks of 8x8 pixels. Each such block undergoes a discrete cosine transform (DCT). The obtained DCT coefficients are quantized (for Y, Cb and Cr, in general, different quantization matrices are used) and packed using run coding and Huffman codes.

HF communication device 4 receives the processed data via communication channel 3 and sends it to the device for receiving and displaying data 5, for example, via Ethernet using the TCP / IP and HTTP protocols, which processes the information received and displays photo or video frames to the dispatcher performing manipulations with switchgears at an electrical substation by telecontrol.

Thus, with the help of the proposed utility model, it becomes possible to organize technological monitoring of the state of switchgear at the substation, as well as control the absence of personnel in the hazardous area at the time of switching over digital high-frequency communication channels organized in a narrow frequency band (4-12 kHz).

Sources of information

1.https: //multio.ru/apparatura-vch-svyazi-sstm-es100.

Claims (4)

1. A device for high-frequency communication over power lines, characterized in that it contains a technological observation unit made with the possibility of decimating frames to reduce their frequency received from a technological observation camera and transmitting the processed data to a digital high-frequency communication channel. 2. The device according to claim. 1, characterized in that the technological observation unit is made with the possibility of additional compression of the photo or video images received from the technological observation camera. 3. The device according to claim 1, characterized in that the technological observation unit is configured to fram the data received from the technological observation camera. 4. The device according to claim 1, characterized in that the technological monitoring unit is configured to transmit processed data to a digital communication channel formed by communication devices via power lines.

Images