CN205123735U - Down signal processing system of distribution automation system - Google Patents

Abstract

The utility model relates to a downlink signal processing system of a power distribution automation system, which is composed of an optical fiber communication system, an optical network unit device, a head-end device, a relay device, a terminal device, and a coupler. The utility model can realize optical fiber communication and carrier communication Therefore, it can reduce the laying of optical fibers in the construction of communication lines, thereby reducing the construction cost of communication lines, and can also speed up the progress of smart grid construction.

Description

A Downstream Signal Processing System of Distribution Automation System

technical field

The utility model relates to a communication signal processing system, in particular to a downlink signal processing system of a power distribution automation system.

Background technique

Distribution automation system is the main content of smart grid construction. The smart grid is based on an open and interconnected information model, by loading system digital equipment and upgrading the grid network management system, it realizes the entire process of the power industry such as power generation, transmission, power supply, power consumption, customer power sales, grid level scheduling, and comprehensive services. Intelligent, informatization, and hierarchical interactive management, while optical fiber communication is the main communication method in the transformation of distribution automation systems. However, from the actual situation, for areas without reserved communication pipelines, the investment cost of new optical fiber communication facilities is relatively high, and construction is difficult; for areas with reserved communication pipelines, due to ground subsidence and other pipeline construction, 20% -30% of the pipes have been blocked, resulting in the inability of optical fibers to pass through. Due to these reasons, the cost of networking using only optical fiber communication is relatively high.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the utility model provides a downstream signal processing system of a power distribution automation system that can solve data communication without fully laying optical fiber channels.

The purpose of this utility model is achieved like this: a kind of downlink signal processing system of power distribution automation system, is made up of optical fiber communication system, optical network unit equipment, head-end equipment, relay equipment, terminal equipment, coupler, is characterized in that:

A. The optical network unit equipment and the head-end equipment equipped with a carrier signal processing chip are connected by a network cable;

B. The head-end device is connected to the relay device equipped with a gain processing chip through a cable, and both the head-end device and the relay device are connected to the cable through a coupler;

C. The relay device is connected to the terminal device equipped with a carrier signal processing chip through a cable, and both the relay device and the terminal device are connected to the cable through a coupler;

D. The terminal equipment is connected with the user terminal.

The relay device is also provided with a carrier signal processing chip, and the relay device is directly connected to the user terminal.

The couplers are respectively connected to the cables at both ends of the power grid switching station.

Using the downlink signal processing system of the utility model, the optical network unit equipment is connected with the optical fiber communication system, the downlink data sent in the form of light waves is received and a digital signal is sent out, and then the digital signal is received by the head-end device and converted into The carrier signal transmitted in the cable, at the same time, gain the carrier signal through the relay equipment to make up for the loss in the transmission process, and finally receive the above carrier signal through the terminal equipment, convert it into a digital signal and send it to the user terminal, which can realize The mixed networking of optical fiber communication and carrier communication can reduce the laying of optical fibers in the construction of communication lines, thereby reducing the construction cost of communication lines, and can also speed up the progress of smart grid construction.

Description of drawings

Fig. 1 is a block diagram of the utility model;

Fig. 2 is a schematic diagram of an embodiment of the utility model.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figures 1 and 2, the utility model consists of an optical fiber communication system, an optical network unit device 1, a head-end device 2, a relay device 3, a terminal device 4, and a coupler 10.

The optical network unit device is used to receive the optical signal sent by the optical fiber communication system, convert the optical signal into a digital signal, and then send the digital signal. Among them, the optical network unit device is ONU (OpticalNetworkUnit); the optical signal sent by the optical fiber communication system can be the downlink communication data in the form of light waves sent by the OLT (optical line terminal) in broadcast mode. 3 Standard digital signals, used to represent downlink communication data.

The head-end device is connected to the optical network unit device through a network cable to receive digital signals and convert the digital signals into carrier signals before sending. The head-end device can be a device equipped with a carrier signal processing chip, such as a power modem, whose function is to process and convert the digital signal conforming to the IEEE802.3 standard into an analog electrical signal suitable for transmission on the power line, which is used to represent downlink communication data . Specifically, the digital signal conforming to the IEEE802.3 standard received by the port of the head-end device is converted into a carrier analog signal suitable for transmission on a power cable through encryption, coding, and modulation processing.

The relay device is connected with the head-end device through a cable, and is used to receive the carrier signal, gain the carrier signal and send it again. Since the carrier signal is essentially an electromagnetic signal, it will attenuate as the transmission distance increases. The relay device can be a device equipped with a gain processing chip, such as a power modem, which can perform signal gain on the carrier signal to compensate for signal attenuation and loss during long-distance transmission of the signal in the cable.

The terminal device is connected to the relay device through a cable, and is used to receive the amplified carrier signal, convert it into a digital signal, and send the digital signal to the first user terminal 5 . The terminal device can be a device equipped with a carrier signal processing chip, such as a power modem, whose function is to process and convert the carrier signal into a digital signal suitable for transmission in the network cable, which is used to represent downlink communication data. Specifically, the carrier signal received by the device port is demodulated and decrypted, converted into a digital signal conforming to the IEEE802.3 standard, and then sent to the first user terminal to complete the process of sending downlink data.

Since there may also be user terminals that need to receive downlink data at the location of the relay device, the relay device can also be used to convert the carrier signal into a digital signal and send it to the second user terminal 6, that is, the relay device is equipped with a carrier signal The processing chip is used to demodulate and decrypt the carrier signal sent from the port of the head-end device, convert it into a digital signal conforming to the IEEE802.3 standard, and then send it to the second user terminal to complete the process of sending downlink data.

The downlink signal processing system in this embodiment further includes a first coupler 10-1 and a second coupler 10-2. The head-end device is connected to the first end of the first cable 11-1 through the first coupler, and the relay device is connected to the second end of the first cable through the second coupler. The first coupler is used to couple the carrier signal into the first cable; the second coupler is used to couple the carrier signal in the first cable to the relay device.

This embodiment further includes: a third coupler 10-3 and a fourth coupler 10-4. The relay device is connected to the first end of the second cable 11-2 through the third coupler, and the terminal device is connected to the second end of the second cable through the fourth coupler. The third coupler is used to couple the amplified carrier signal to the second cable; the fourth coupler is used to couple the amplified carrier signal in the second cable to the terminal device.

The coupler is installed at both ends of a cable, and its function is signal coupling and high-voltage isolation, that is, the carrier signal sent by the device is coupled to the cable for transmission through coupling, and the coupler is installed on the original cable line. , no need to change the line, nor break the line.

If there is a switching station 12 in the power grid, the position of the coupler should be across the switching station, so as to avoid the carrier signal directly passing through the switching station during transmission, which will be affected by certain interference and affect the quality of the signal.

Claims (3)

1. a distribution automation system downstream signal processing system is made up of optical fiber communication system, optical network unit equipment, head-end equipment, relay equipment, terminal equipment, coupler, is characterized in that: A. The optical network unit equipment and the head-end equipment equipped with a carrier signal processing chip are connected by a network cable; B. The head-end device is connected to the relay device equipped with a gain processing chip through a cable, and both the head-end device and the relay device are connected to the cable through a coupler; C. The relay device is connected to the terminal device equipped with a carrier signal processing chip through a cable, and both the relay device and the terminal device are connected to the cable through a coupler; D. The terminal equipment is connected with the user terminal. 2. A downlink signal processing system of a power distribution automation system according to claim 1, wherein the relay device is also provided with a carrier signal processing chip, and the relay device is directly connected to the user terminal. 3. The downstream signal processing system of a power distribution automation system according to claim 1, wherein the couplers are respectively connected to the cables at both ends of the power grid switching station.