CN101582844A - Negative testing method applicable to standard and digital relay protective devices - Google Patents
Negative testing method applicable to standard and digital relay protective devices Download PDFInfo
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- CN101582844A CN101582844A CNA2009100326217A CN200910032621A CN101582844A CN 101582844 A CN101582844 A CN 101582844A CN A2009100326217 A CNA2009100326217 A CN A2009100326217A CN 200910032621 A CN200910032621 A CN 200910032621A CN 101582844 A CN101582844 A CN 101582844A
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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
The present invention is for standard and digital relay protective devices provides a kind of negative method of testing, promptly a kind of method of testing of testing the communication abnormality disposal ability of digital relay protection device.The technical field that belongs to the Automation of Electric Systems device.
Background technology
Along with the research and development of digital transformer substation are promoted, the protective device (digital protection device) of digital transformer substation and electronic mutual inductor interface has appearred more and more being used for.Such protective device is different with traditional microcomputer protecting device that passes through acquisition system secondary side voltage, electric current, and it mainly receives the digital signal of merge cells (MU) by optical fiber, provides action command according to the protection logic then.Adopt unified agreement between it and other intelligent apparatus, carry out exchanges data, and realize real resource-sharing, data sharing by network by network.Thereby such protective relaying device has advantages such as antijamming capability is strong, in light weight, volume is little, cost is low, networking flexibility.
Digital transformer substation generally adopts optical fiber to carry out the communication connection.The reliability of optical-fibre communications is very high, and the general error rate is all below 1.0E-10.Yet for the digital protection device of long-time running, data quantity transmitted also is surprising on the optical fiber.With a digital protection device with 12 analog channel inputs is example; data communication amount in one day time between protective device and the merge cells (MU) is approximately 0.4E10; that is to say that the probability that every day occurs an error code is 40% under the situation of the normal operation of optical fiber.And ill-conditioned in communication, under the situations such as, loose contact aging such as optical fiber, the error rate of optical-fibre communications can have greatly improved.Thereby, be necessary to consider in the digital protection device because the influence that optical-fibre communications causes to protective device unusually.
The test of present stage for the digital protection device mainly contains two kinds of approach: a kind of is to be converted to the digital signal output that meets the IEC61850 stipulations by specific device by the output with the relay-protection tester of routine; another kind of approach is by existing digital relay protection tester, and directly output meets the digital signal of IEC61850 stipulations.Yet in the initial testing stage, optical fiber generally all is under the good ruuning situation, wants to test in this way in optical-fibre communications and descends the digital protection device whether can correctly handle to be very difficulty unusually.Thereby be necessary artificial analog optical fiber communication abnormality, test of the processing of digital protection device for communication abnormality.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of negative method of testing that is applicable to standard and digital relay protective devices.By customization to digitlization relay-protection tester outgoing message, the communication abnormality that artificial simulation may occur, thus solve the difficult problem of digital relay protection device communication abnormality disposal ability test.
Technical scheme: the negative method of testing that is applicable to standard and digital relay protective devices of the present invention: according to user's setting, the abnormal conditions that may occur in the analog digital protective relaying device data exchange process, the exception handling ability of test digital relay protection device; Specifically comprise test packet destination address mistake or error in data disposal ability and test packet forward delay interval disposal ability,
The concrete grammar of test packet destination address mistake or error in data disposal ability is:
1) be provided with according to the user and generate the message control sequence, with this sequence as the foundation that message is handled;
2) generate correct data message according to IEC61850 stipulations or other relevant criterion;
3) generate from step 1) and find the pairing controlling value of the current message that will export the message control sequence;
4) controlling value is judged,, then directly entered step 6) if controlling value is 0; If pairing controlling value is 1, then enter step 5);
5) according to the function of being tested correct message is made amendment; If test target address error disposal ability is then partly carried out random modification to destination address.If test data message error processing capacity is then carried out random modification to the data message part; The principle of revising is, no matter how to revise, must guarantee error message verification and with the verification of correct message and inconsistent;
6) data message is sent to tested device;
The concrete grammar of test packet forward delay interval disposal ability is:
21) be provided with according to the user and generate the message control sequence, with this sequence as the foundation that message is handled;
22) in each message output is regularly interrupted, generate correct data message according to IEC61850 stipulations or other relevant criterion;
23) from step 21) generate and find the pairing controlling value of the current message that will export the message control sequence, controlling value is judged, if controlling value is 1, then enter step 24 step, otherwise enter step 25);
24) message is put into buffer memory;
25) check in the buffer memory of depositing message whether deposited message,, then directly enter step 28 if there is not message to deposit), otherwise enter step 26);
26) message of current generation is put into buffer memory;
27) from buffer memory, take out the message that deposits in the earliest, and leave in the current message memory space;
28) current message is sent to tested device;
29) check in the buffer memory whether also have message,, then finish this regularly Interrupt Process if do not have; If have, then enter step 27) continue to handle.
Test packet destination address mistake or error in data method of processing capacity are: generated the message control sequence in advance, during each message regularly interrupts then, generated correct data message, then with reference to the message control sequence to the output of making amendment of data message.
Test packet forward delay interval method of processing capacity is: generated the message control sequence in advance, during each message regularly interrupts then, generated correct data message.Whether the correspondence position data are 0 in the detection messages control sequence, if 0, then check and whether have message in the buffer memory, deposit current message in buffer memory if having then, according to the principle of first in first out the message in the buffer memory is taken out one by one and to send to tested device, if do not exist message then directly to send to tested device.If the value of correspondence position is 1 in the message control sequence, then deposit message in buffer memory, finish this Interrupt Process.
Used tester is the iPACS-MATE relay-protection tester.
Beneficial effect: this method realizes in the general relay-protection tester of iPACS-MATE digital-to-analogue that our company produces; and being used for the test of digital relay protection device that company is produced, the result shows that the exception handling ability that this method can effectively be tested standard and digital relay protective devices tests.Compare the exception handling ability of testing protective device generally speaking by the modification program that protective device moved, this method is simple and convenient.
Description of drawings
Fig. 1 message control sequence schematic diagram.
Fig. 2 destination address or data exception module controls flow graph.
Fig. 3 forward delay interval module controls flow graph.
Embodiment
In the network communication of simple architecture, owing to there is not a route selection, thereby its unusual main 2 kinds of situations of having only: the one, the frame mistake that causes owing to error code, the 2nd, under the very heavy situation of offered load, the frame forward delay interval.Under first kind of situation, again because the randomness of error code occurrence positions may cause two kinds of influences.A kind of is that error code occurs in destination address part in the net frame, in this case, generally can cause receiving terminal can't receive Ethernet; Another kind of situation is the other parts that error code occurs in ethernet frame, in this case, and the receiving terminal literary composition of can receiving telegraph, but wrong in the message.
At above various, the basic skills of this method of testing is to realize three functional modules earlier, handles above unusual combination respectively: destination address abnormal module, data exception module and time-delay sending module.
The destination address abnormal module is the same substantially with the implementation method of data exception module, and just the data of being revised when generating peculiar message are different.Concrete grammar is:
1) according to the user output sequence that generates correct message and error message is set, as shown in Figure 1;
2) when relay-protection tester timing down trigger, generate correct data message according to IEC61850 stipulations or other standard;
3) according to the message output sequence to corresponding data in the correct data message make amendment (modifying target address or revise message data part);
4) data message is exported;
5) repeat 2), 3), 4).
The destination address abnormal module can be tested the frame losing interpolation of sampling module in the protective device and continuous function such as frame losing latch-up protection.Communication between protective device and the ICU (intelligent control unit) because much install a shared GOOSE net, so just can be tested the address that was set to the A target originally, but because error code has become the situation of B target.In this case, since the check code mistake, the influence that is not subjected to error message that the B target should be able to be correct.Functions such as the data exception module can the calculating of sampling module check code, frame losing interpolation.For control section, can test the retransmission mechanism of communication etc.
The concrete grammar of time-delay sending module is:
1) according to the user sequence whether the needs time-delay is exported is set, as shown in Figure 1;
2) when relay-protection tester timing down trigger, generate correct data message according to IEC61850 stipulations or other standard;
3) detect whether this bag needs time-delay in the output sequence, if need time-delay then message to be put into buffer memory.If do not need time-delay, then the message in the buffer memory exported one by one by the principle of first in first out.
4) repeat 2), 3).
Time-delay sends unusual because the protective device sampling section generally adopts optical fiber direct-connected, and the data volume on the optical-fibre channel is stablized and generally can not be taken place.At control module, can correctly handle for late message in the time of can the test network storm.
In the digital relay protection tester, at first be provided with and generate the message control sequence according to the user, with this sequence as the foundation that outgoing message is handled.Generate correct data message according to IEC61850 or other standard then, with reference to the message control sequence,, then normally export this message if corresponding value is 0 in the sequence of message, if value corresponding in the sequence of message is 1, then message is handled according to the concrete exception handling ability of being tested., then destination address is made amendment when unusual in the test target address, the message with amended destination address mistake sends then.If test data when unusual, is then made amendment to the data division in the message, the error message that will revise data division then sends.When transmission is unusual if test is delayed time, then earlier message is put into buffer memory, up to detecting current message corresponding value in the message control sequence is 0 o'clock, and the principle of the message in the buffer memory by first in first out sent one by one, more current message is sent at last.
The present invention is described further below in conjunction with accompanying drawing.
Fig. 1 is a control sequence schematic diagram of the present invention.This sequence is generated according to the rule that the user sets automatically by program.In whole test process, with deciding this to export which type of message.What 1. section represented continuous 4 outputs in the schematic diagram all is normal message.2. section represents to export once wrong message.3. section represents that 3 messages of output all are wrong continuously.4. section represents that 4 messages of output continuously all are not delay time.5. section represents that 1 message of first message delay exports at interval, the transmitting time output of a message of a back message delay.6. section represents that 3 messages of first message delay export at interval, and 2 messages of second message delay are exported at interval, and the rest may be inferred.
Fig. 2 is destination address of the present invention or data exception module controls flow graph.This module is mainly used in the analog message destination address or there is unusual situation in data division.The course of work is described as follows:
1. generate correct data message according to IEC61850 stipulations or other relevant criterion.
2. from message control sequence shown in Figure 1, find the pairing controlling value of the current message that will export.
3. controlling value is judged,, then directly entered for the 5th step if controlling value is 0; If pairing controlling value is 1, then entered for the 4th step.
4. according to the function of being tested correct message is made amendment.If test target address mistake is then partly carried out random modification to destination address, if test data message mistake is then carried out random modification to the data message part.The principle of revising is, no matter how to revise, must guarantee error message verification and with the verification of correct message and inconsistent.
5. data message is sent to tested device.
Fig. 3 is a forward delay interval module controls flow graph of the present invention.When this module is mainly used to the test data forward delay interval, the disposal ability of tested device.The course of work is described as follows:
1. generate correct data message according to IEC61850 stipulations or other relevant criterion.
2. from message control sequence shown in Figure 1, find the pairing controlling value of the current message that will export.
3. controlling value is judged, if controlling value is 1, then entered for the 4th step, otherwise entered for 5 steps.
4. message is put into buffer memory.
5. check in the buffer memory of depositing message whether deposited message,, then directly entered for the 8th step if there is not message to deposit.Otherwise entered for the 6th step.
6. the message of current generation is put into buffer memory.
7. from buffer memory, take out the message that deposits in the earliest, and leave in the current message memory space.
8. current message is sent to tested device.
9. whether also there is message in the inspection buffer memory, then do not finish this regularly Interrupt Process if having.If have, then enter the continuation of the 7th step and handle.
Claims (3)
1. negative method of testing that is applicable to standard and digital relay protective devices, it is characterized in that: according to user's setting, the abnormal conditions that may occur in the analog digital protective relaying device data exchange process, the exception handling ability of test digital relay protection device; Specifically comprise test packet destination address mistake or error in data disposal ability and test packet forward delay interval disposal ability,
The concrete grammar of test packet destination address mistake or error in data disposal ability is:
1) be provided with according to the user and generate the message control sequence, with this sequence as the foundation that message is handled;
2) generate correct data message according to IEC61850 stipulations or other relevant criterion;
3) generate from step 1) and find the pairing controlling value of the current message that will export the message control sequence;
4) controlling value is judged,, then directly entered step 6) if controlling value is 0; If pairing controlling value is 1, then enter step 5);
5) according to the function of being tested correct message is made amendment; If test target address error disposal ability is then partly carried out random modification to destination address.If test data message error processing capacity is then carried out random modification to the data message part; The principle of revising is, no matter how to revise, must guarantee error message verification and with the verification of correct message and inconsistent;
6) data message is sent to tested device;
The concrete grammar of test packet forward delay interval disposal ability is:
21) be provided with according to the user and generate the message control sequence, with this sequence as the foundation that message is handled;
22) in each message output is regularly interrupted, generate correct data message according to IEC61850 stipulations or other relevant criterion;
23) from step 21) generate and find the pairing controlling value of the current message that will export the message control sequence, controlling value is judged, if controlling value is 1, then enter step 24 step, otherwise enter step 25);
24) message is put into buffer memory;
25) check in the buffer memory of depositing message whether deposited message,, then directly enter step 28 if there is not message to deposit), otherwise enter step 26);
26) message of current generation is put into buffer memory;
27) from buffer memory, take out the message that deposits in the earliest, and leave in the current message memory space;
28) current message is sent to tested device;
29) check in the buffer memory whether also have message,, then finish this regularly Interrupt Process if do not have; If have, then enter step 27) continue to handle.
2. the negative method of testing that is applicable to standard and digital relay protective devices according to claim 1; it is characterized in that test packet destination address mistake or error in data method of processing capacity are: generated the message control sequence in advance; during each message regularly interrupts then; generate correct data message, then with reference to the message control sequence to the output of making amendment of data message.
3. the negative method of testing that is applicable to standard and digital relay protective devices according to claim 1; it is characterized in that test packet forward delay interval method of processing capacity is: generated the message control sequence in advance; during each message regularly interrupts then, generate correct data message.Whether the correspondence position data are 0 in the detection messages control sequence, if 0, then check and whether have message in the buffer memory, deposit current message in buffer memory if having then, according to the principle of first in first out the message in the buffer memory is taken out one by one and to send to tested device, if do not exist message then directly to send to tested device.If the value of correspondence position is 1 in the message control sequence, then deposit message in buffer memory, finish this Interrupt Process.
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| CN103744422A (en) * | 2014-01-06 | 2014-04-23 | 国家电网公司 | Automatic testing method for relay protection device based on IEC61850 standard |
| CN104897980A (en) * | 2015-03-15 | 2015-09-09 | 国家电网公司 | Method of evaluating longitudinal differential protection device abnormal action probabilities caused by communication delay error code |
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| CN105720959A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Method and system for testing trigger time-delay of relay protection tester |
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| CN103744422A (en) * | 2014-01-06 | 2014-04-23 | 国家电网公司 | Automatic testing method for relay protection device based on IEC61850 standard |
| CN103744422B (en) * | 2014-01-06 | 2016-04-06 | 国家电网公司 | A kind of to the protective relaying device automatic test approach based on IEC61850 standard |
| CN105720959A (en) * | 2014-12-04 | 2016-06-29 | 国家电网公司 | Method and system for testing trigger time-delay of relay protection tester |
| CN105720959B (en) * | 2014-12-04 | 2019-01-25 | 国家电网公司 | A kind of method and system for testing relay-protection tester Time delay |
| CN104897980A (en) * | 2015-03-15 | 2015-09-09 | 国家电网公司 | Method of evaluating longitudinal differential protection device abnormal action probabilities caused by communication delay error code |
| CN104897980B (en) * | 2015-03-15 | 2017-11-03 | 国家电网公司 | A kind of improper action probability evaluation method of failure of longitudinal differential protecting equipment caused by communication delay error code |
| CN105099810A (en) * | 2015-05-27 | 2015-11-25 | 国家电网公司 | Communication test method and system for sampling value interface |
| CN107340436A (en) * | 2016-04-28 | 2017-11-10 | 中国电力科学研究院 | A kind of intelligent substation relay protection sampled data exception analog detection method |
| CN107340436B (en) * | 2016-04-28 | 2020-11-27 | 中国电力科学研究院 | Intelligent substation relay protection sampling data abnormity simulation test method |
| CN111880134A (en) * | 2020-06-24 | 2020-11-03 | 南方电网科学研究院有限责任公司 | Method and device for testing quality abnormity of electronic transformer measurement system |
| CN111880134B (en) * | 2020-06-24 | 2023-01-03 | 南方电网科学研究院有限责任公司 | Method and device for testing quality abnormity of electronic transformer measurement system |
| CN113708993A (en) * | 2021-08-13 | 2021-11-26 | 视联动力信息技术股份有限公司 | Abnormal state testing method and device, terminal equipment and storage medium |
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