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Method for transmitting positive and negative data across safety zone

A data transmission method and cross-safety zone technology, applied in the field of two-way transmission and power dispatching automation system, can solve the problem that cross-area communication cannot provide a transparent, two-way, safe, stable and efficient transmission method, etc., to improve communication reliability. , the effect of improving operating efficiency and reducing the number of

Active Publication Date: 2011-06-08
GUANGDONG POWER GRID CO LTD
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Problems solved by technology

[0008] The problem to be solved by the present invention is: the cross-area communication of the security zone 1 and zone 3 in the existing power dispatching automation system cannot provide a transparent, two-way, safe, stable and efficient transmission mode, and there are defects, which are not conducive to maintenance and expansion

Method used

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  • Method for transmitting positive and negative data across safety zone
  • Method for transmitting positive and negative data across safety zone
  • Method for transmitting positive and negative data across safety zone

Examples

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Embodiment Construction

[0029] like figure 1 As shown in the schematic diagram of the communication between the first and third areas, the data acquisition SCADA server in the first area is responsible for real-time data acquisition, and the real-time data can be viewed through the dispatcher workstation, maintenance workstation, and five-defense workstation in the first area. If the WEB application in the third area also needs real-time data, the first zone needs to transmit the real-time data to the third zone through the positive isolation device. The process is as follows: applications in the three regions subscribe to real-time data in the first region, and the subscription message is sent to the first region through the reverse isolation device, and is received by the cross-region forwarding program of the first region, and forms a subscription list, and the cross-region forwarding program intercepts the corresponding data according to the subscription list. The event message sent by the applic...

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Abstract

The invention discloses a method for transmitting positive and negative data across a safety zone, which is applied to message transmission of a power scheduling automatic system across the safety zone. A communication mechanism which combines positive communication with negative communication is used for forming a complete communication loop for message interception and message forwarding. The invention provides a safety zone crossing communication method which is suitable for the communication mode of combining positive communication with negative communication across the safety zone in a power system, and is used for realizing bidirectional interactive transparent forwarding by combining network message interception and a positive and negative forwarding program, realizing shunting of different service messages under service quality control and increasing the running efficiency. System integration complexity is simplified, a positive message transmission process and a negative filetransmission process which are originally independent of each other are connected in a seamless way through a program, and communication between application programs across the safety zone is as convenient as that in the same safety zone. Moreover, basis is provided for accurate positioning of retransmission messages, the quantity of retransmission messages is reduced, and the communication reliability is enhanced.

Description

technical field [0001] The invention is used in the electric power dispatching automation system, especially the two-way transmission of the data of the electric power dispatching automation system across the security zone, and is a forward and reverse data transmission method across the security zone. Background technique [0002] According to the requirements of the "National Power Secondary System Safety Protection Overall Plan", the power dispatching automation system is divided into 4 safety areas, namely: safety area 1, real-time control area; safety area 2, non-controlled production area; safety area 3, Production management area; four security areas, management information area. Among them, the communication safety of the first and third areas is guaranteed by the isolation communication device. The communication from zone 1 to zone 3 passes through the forward isolating device, one-way communication, and the reverse direction (zone 3 to zone 1) can only pass a one-...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/08H04L1/18H04L12/931
Inventor 孙超卢建刚陆鑫曾永坚王艳荣邓大为刘洋苏扬
Owner GUANGDONG POWER GRID CO LTD
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