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Digital communication device in transformer substation

A technology for substations and equipment, applied in digital transmission systems, electrical components, data exchange networks, etc., can solve the problems of large amount of telemetry and remote signaling data, unsatisfactory transmission rate, etc., and achieve the effect of improving speed and reliability

Inactive Publication Date: 2006-07-19
任月吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increasing capacity of substations and the installation of more and more automation equipment, the amount of telemetry and telesignaling data to be transmitted is increasing, and the transmission rate of 1200bps is obviously unable to meet the growing needs.

Method used

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  • Digital communication device in transformer substation
  • Digital communication device in transformer substation
  • Digital communication device in transformer substation

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Experimental program
Comparison scheme
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Embodiment Construction

[0017] Substation digital communication equipment (G.703 co-directional 64K interface) standard introduction of the present invention: G.703 co-directional 64K interface standard is a communication standard proposed by the International Telecommunications Union (ITU), which belongs to the G.703 standard A part of the series. It is a communication standard protocol widely supported by modern digital communication equipment. It mainly includes the following contents:

[0018] Three types of signals can be transmitted simultaneously on a communication line:

[0019] 64Kbit / s digital information.

[0020] 64KHz timing signal

[0021] 8KHz timing signal

[0022] The maximum error of the timing signal is required to be ±100ppm. (That is, in every megabit (bit), the error cannot be greater than 100 bits, that is, the timing accuracy is 10 -4 ). In addition, a transformer should be used for signal isolation in the interface.

[0023] G.703 co-directional 64K interface standard...

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PUM

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Abstract

The invention relates to a digital communication device of transformer substation, which is formed by a signal input circuit, a control circuit and a signal output circuit which are connected to the transformer. Wherein, said signal input circuit via the signal modulator is connected to the single chip of control circuit; the output of said single chip is connected to the synchronous interface circuit, the asynchronous interface circuit, the standard interface circuit and the memory of signal output circuit; the single chip has a dial code switch circuit for setting the speed of said synchronous interface circuit and asynchronous interface circuit. The invention uses the G703 parallel 64K digital interface of optical fiber and microwave device, to directly transmit the digital signal, without using the analogue conversion, while the transmission speed can reach 9.6K-55Kbps, and it can supply the 10BaseT network interface to build variable digital communication network to improve the speed and reliability of data transmission.

Description

technical field [0001] The invention belongs to the technical field of digital communication transmission, and relates to a converter, in particular to a substation digital communication device. Background technique [0002] In the remote control system (RTU) in the central province, the communication channel generally adopts analog Modem, and the rate is 1200bps. With the increasing capacity of substations and more and more equipment, the amount of data such as telemetry and remote signaling that needs to be transmitted is also increasing. The transmission speed of 1200bps is obviously unable to meet the growing needs. [0003] At present, in the provincial remote control system (RTU), the communication system basically uses microwave and optical fiber communication. Each substation occupies one PCM (64K) analog voice channel, and uses Modem to modulate and demodulate digital signals. The transmission The rate is generally 1200bps. In such a system, in order to improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/00
Inventor 任月吉
Owner 任月吉