Method for monitoring communication state of variable-frequency node in power telecontrol network

A technology of power telecontrol and communication status, applied in the direction of data exchange network, electrical components, circuit devices, etc., can solve the problems of inability to distinguish, small bandwidth, unable to reflect the change trend of node communication status and communication parameters, etc., to improve the test frequency. , The effect of reducing the test frequency and quickly eliminating interference

Inactive Publication Date: 2012-07-11
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. A test only represents the communication state at the time of the test, and cannot reflect the change trend of the node's communication state and communication parameters within a period of time;
[0004] 2. There are unexpected states in the network that can interfere with the test results. The existing technology cannot distinguish such interference, resulting in misjudgment that the node state has repeatedly changed repeatedly;
[0005] 3. There are a large number of power telecontrol network nodes. For example, the regional power grid in Shandong Province has hundreds of substations. The power telecontrol network itself has a small bandwidth (64Kbps to 2Mbps), and there is a possibility of sending a large number of accident signals in a short period of time. It cannot occupy a large amount of its bandwidth for a long time. The existing technology can only rely on increasing the inherent detection frequency to improve the test accuracy, and cannot dynamically change the test frequency. It is not suitable for long-term monitoring of telecontrol networks.

Method used

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  • Method for monitoring communication state of variable-frequency node in power telecontrol network
  • Method for monitoring communication state of variable-frequency node in power telecontrol network

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Embodiment 1: Monitoring startup process of normal channel

[0072] The first step, setting steady state test interval T1=1000 milliseconds, unstable state test interval T2=50 milliseconds, abnormal test interval T3=500 milliseconds; steady state data queue length K1=10, unstable state data queue length K2=20 , the test packet size is 32 bytes, the longest waiting time is 300 milliseconds; the total number of targets is 100, as an example, set the fifth target IP address to 192.168.1.1; set the system timing interval to 50ms;

[0073] The second step is to establish a data model for all target addresses, set the initial value of the target 192.168.1.1 as a test interval t=T1=1000 milliseconds, establish an empty data queue with a length of k=K2=10, and the initial connection state x is a stable state , the initial network state y is good, and the initialization of the test program P is completed; the system timer is started, the current reading is 0 milliseconds, and it...

Embodiment 2

[0085] Embodiment 2: Judgment process of channel failure

[0086] The first step has been completed, set the steady state test interval T1=1000 milliseconds, the unstable state test interval T2=50 milliseconds, the abnormal test interval T3=500 milliseconds; the steady state data queue length K1=10, the unstable state data queue length K2 =20, the test packet size is 32 bytes, the longest waiting time is 300 milliseconds; the total number of targets is 100, as an example, set the fifth target IP address to 192.168.1.1; set the system timing interval to 50ms;

[0087] The second step has been completed, establish a data model for all target addresses, set the initial value of the target 192.168.1.1 as the test interval t=T1=1000 milliseconds, create an empty data queue with a length of k=K2=10, and the initial connection state x as Stable state, the initial network state y is good, and the initialization of the test program P is completed; the system timer is started, the curre...

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Abstract

The invention discloses a method for monitoring the communication state of a variable-frequency node in a power telecontrol network. By the method, the accuracy of judging network communication states can be improved, and the resource consumption during system testing can be reduced. The method comprises the following steps of: setting data and starting a timer; judging whether the timer should trigger a test according to monitoring parameters; establishing an independent sub-thread which does not influence a main program, wherein the sub-thread is used for testing; transmitting testing packets, receiving testing results and saving the testing results in a queue; judging whether the testing results are excessive and discarding redundant testing results; determining a connection state according to the last testing result and modifying the connection state and the monitoring parameters; calculating related testing parameters; and judging whether the testing results in the queue are enough, if the testing results in the queue are not enough, finishing a test, if the testing results in the queue are enough, modifying a current network state and the monitoring parameters, and providing a result report of the test.

Description

technical field [0001] The invention relates to a method for monitoring the state of power communication, in particular to a method for monitoring the state of communication of nodes with variable frequency in a power telecontrol network. Background technique [0002] Ethernet is widely used in electric power telecontrol network. As a key node in electric power telecontrol network, substation telemotor is responsible for transmitting important information to electric power dispatching, so it is extremely important to ensure its connectivity. At present, two independent networks and two remote machines are used on site to back up each other so that the communication will not be interrupted when the network fails or the equipment fails. The network protocol stipulates a message format ICMP, which is used to test the communication status of an IP address in the network, and the message can be sent by programming or by using the command PING. At present, the way to find out the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L29/08H04L29/12H02J13/00
Inventor 韩振峰刘希峰李颖刘矞李颖慧徐征崔好李菁竹张进潘向华白英伟王彦博张文娟宋娜冯燕闫超韩委石璐王雪丽
Owner STATE GRID CORP OF CHINA
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