Negative testing method applicable to standard and digital relay protective devices

A technology of relay protection device and testing method, which is applied in the direction of digital transmission system, electrical components, data exchange network, etc., and can solve problems such as difficulty in testing communication abnormal handling ability

Active Publication Date: 2009-11-18
JIANGSU WISCOM TECHNOLOGY CO LTD
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Problems solved by technology

By customizing the output message of the digital relay protection tester, artificially simulating possible communication abnormaliti...

Method used

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  • Negative testing method applicable to standard and digital relay protective devices
  • Negative testing method applicable to standard and digital relay protective devices
  • Negative testing method applicable to standard and digital relay protective devices

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Embodiment Construction

[0031] In network communication with a simple architecture, since there is no routing, there are only two types of abnormalities: one is frame errors caused by bit errors, and the other is delays in sending frames when the network load is heavy. In the first case, there may be two effects due to the randomness of the position where the bit error occurs. One is that the bit error occurs in the target address part of the Ethernet frame. In this case, the receiver cannot receive the Ethernet; the other is that the bit error occurs in other parts of the Ethernet frame. In this case In this case, the receiving end can receive the message, but there is an error in the message.

[0032] For the above, the basic method of the test method is to implement three functional modules to deal with the above abnormal combination respectively: target address abnormal module, data abnormal module and delayed sending module.

[0033] The implementation methods of the target address exception mo...

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Abstract

The invention relates to a negative testing method applicable to standard and digital relay protective devices, which is characterized by simulating possible abnormal conditions in a data interaction process of a digital relay protection device according to the configuration of a user and testing the abnormal condition handling capacities of the digital relay protection device, wherein abnormal condition handling capacities comprise a capacity for handling test message destination address errors and data errors and a capacity for handling delayed test message transmission. The test of whether a digital protection device has an abnormal optical fiber communication condition handling capacity under a condition of sound operation of optical fibers in an initial test stage is difficult, so artificially simulation of abnormal optical fiber communication conditions is necessary for testing the abnormal optical fiber communication condition handling capacity of the digital protection device. Through the customization of output messages of a digital relay protection tester, possible abnormal communication conditions can be simulated artificially, so the problem of testing the abnormal communication condition handling capacity of the digital relay protection device is solved.

Description

technical field [0001] The invention provides a negative test method for a standardized digital relay protection device, that is, a test method for testing the communication abnormal handling ability of the digital relay protection device. It belongs to the technical field of power system automation devices. Background technique [0002] With the development and promotion of digital substations, more and more protection devices (digital protection devices) for the interface between digital substations and electronic transformers have emerged. This type of protection device is different from the traditional microcomputer protection device that collects the secondary side voltage and current of the system. It mainly receives the digital signal of the merging unit (MU) through optical fiber, and then gives action instructions according to the protection logic. It uses a unified protocol with other smart devices to exchange data through the network, and realize real resource sh...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/26H04L12/861
Inventor 曾兵元金华锋陈晓宇吴兴华
Owner JIANGSU WISCOM TECHNOLOGY CO LTD
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