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Wireless public network communication method with safety protection in power system

A power system and security protection technology, applied in wireless communications, transmission systems, security devices, etc., can solve the problems of data communication without identity authentication and data encryption, unable to resist external network attacks on substations, etc. The effect of safe and effective transmission

Active Publication Date: 2015-09-09
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the data communication between the main station and the sub-station does not carry out identity authentication and data encryption when using the wireless public network communication at present, and cannot resist the attack on the sub-station by the external network. The present invention provides a Wireless public network communication method with safety protection in power system

Method used

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  • Wireless public network communication method with safety protection in power system
  • Wireless public network communication method with safety protection in power system
  • Wireless public network communication method with safety protection in power system

Examples

Experimental program
Comparison scheme
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specific Embodiment approach 1

[0017] Specific implementation mode one: combine figure 1 with figure 2 Describe this embodiment, the wireless public network communication method with safety protection in the power system described in this embodiment,

[0018] It includes the following steps:

[0019] Step 1: The data packets of n groups of integrated equipment or RTU are sent to the corresponding sub-station security gateway through the serial communication port;

[0020] Step 2: Each substation-side security gateway signs and encrypts the received data packet;

[0021] Step 3: determine whether the data packet described in step 2 is encrypted and signed, if so, then use the wireless public network to send the data packet to the master station security gateway, and proceed to step 4; if not, then proceed to step 1;

[0022] Step 4: The master station security gateway de-signatures and decrypts the received data packet;

[0023] Step 5: judge whether the data packet described in step 4 is unsigned and d...

specific Embodiment approach 2

[0026] Specific implementation mode two: combination image 3 Describe this embodiment, this embodiment is a further limitation of the wireless public network communication method with security protection in the power system described in the first embodiment,

[0027] The method for each substation-side security gateway to sign and encrypt the received data packet in the step 2 is:

[0028] Step 21: the IP layer of the security gateway at each substation preprocesses the received data packets;

[0029] Step 22: the IPSec protocol module of the substation end security gateway extracts the feature of the data packet after step 21 preprocessing and compares it with the selector of the SPD interface in the IPSec protocol module, and finds the strategy of applying the IPSec protocol data pack;

[0030] Step two and three: extract the information SAID corresponding to the security association database SADB in the SPD interface of the IPSec protocol module, and the IPSec protocol m...

specific Embodiment approach 3

[0032] Embodiment 3: This embodiment is a further limitation of the wireless public network communication method with security protection in the power system described in Embodiment 1.

[0033] In the step 4, the master station security gateway designs and decrypts the received data packet as follows:

[0034] Step 41: The link layer of the security gateway of the master station preprocesses the received data packets;

[0035] Step 42: the next protocol header field in the IP header in the preprocessed data packet of step 41 is sent to the IPSec processing module of the master station security gateway, and the IPSec processing module is to the described The packet is de-signatured and decrypted;

[0036] Step 42: The IPSec processing module performs subsequent processing on the unsigned and decrypted data packets without errors, and completes the de-signature and decryption of the data packets.

[0037] combine image 3 , IPsec AH (IPsec AH: IPsec Authentication Header) aut...

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Abstract

The invention discloses a wireless public network communication method with security protection in a power system, and relates to a wireless public network communication method. In order to solve the problem that attack of an external network to a substation cannot resisted because identity authentication and data encryption are not carried out in data communication between a master station and the substation when wireless public network communication is used at present, the method comprises the following steps of: transmitting data packets of n groups of integrated automatic equipment or remote terminal units (RTU) to corresponding substation security gateways through serial communication ports; signing and encrypting the received data packets by each substation security gateway; transmitting the data packets to a master station security gateway by using a wireless public network; de-signing and decrypting the received data packets by the master station security gateway; transmitting the data packets to a central wireless gateway system; and transmitting the data packets to a front-end processor of an event management system (EMS) by using a serial RS-232 communication interface through the central wireless gateway system. The method is used for the wireless public network communication in the power system.

Description

technical field [0001] The invention relates to a wireless public network communication method, in particular to a wireless public network communication method with safety protection in a power system. Background technique [0002] With the rapid development of the national economy, the continuous improvement of people's living standards and the continuous advancement of science and technology, the information construction, upgrading and transformation of the power industry, which is the lifeline of the national economy, are becoming more and more urgent. However, looking at the current information construction status of power enterprises in my country, due to the unbalanced geographical distribution and scattered locations of substations in many places, optical fiber communication, wired cables, and power carrier communication networking They are all under great pressure. The communication networking problem of telecontrol and other automation systems has been plaguing the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04W12/02H04W12/03H04W12/06
Inventor 王长东梁岩刘国庆孙红李伟孙蕾王迪
Owner STATE GRID CORP OF CHINA
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