CN202383278U - Merging unit sampling value time delay measuring system - Google Patents
Merging unit sampling value time delay measuring system Download PDFInfo
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- CN202383278U CN202383278U CN2011205027074U CN201120502707U CN202383278U CN 202383278 U CN202383278 U CN 202383278U CN 2011205027074 U CN2011205027074 U CN 2011205027074U CN 201120502707 U CN201120502707 U CN 201120502707U CN 202383278 U CN202383278 U CN 202383278U
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Abstract
The present utility model discloses a merging unit sampling value time delay measuring system. The measuring system comprises a signal generator, a message recording unit, a time signal unit and a time delay measuring unit. The signal generator is used for inputting sampling signals to a detected merging unit in the whole second time; the messaged recording unit is used for receiving network message output by the detected merging unit, and transmitting time of receiving the network message of the detected merging unit to the time delay measuring unit; the time delay measuring unit is used for calculating the time interval between the time of receiving the network message of the detected merging unit by the message recording unit and the whole second; and the time signal unit is used for providing time information to the signal generator and the message recording unit.
Description
Technical field
The utility model belongs to the field of measurement of relay protection, especially relates to a kind of sampled value Time delay measurement system.
Background technology
Continuous development along with the intelligent grid construction; Some new equipment under tests have appearred in field of power; For example electronic mutual inductor, intelligent operation box and merge cells etc.; Merge cells is in order to electric current and/or voltage data from the secondary converter are carried out time coherence combined physical unit, and it can be an assembly of on-the-spot mutual inductor, also can be a separate unit.Its major function is synchronous acquisition three-phase current and three-phase voltage information, and gathers the second protection equipment of exporting to according to certain form.
Merge cells is the intermediate conversion unit that electronic mutual inductor (or traditional secondary current and voltage signals) is converted to the digital quantity signal that meets certain stipulations mode; Compare with traditional approach, be equivalent between mutual inductor and protection equipment, increase an intermediate link.Therefore the phenomenon of transmission delay can appear in the conversion of merge cells internal signal; So each merge cells before dropping into the electric system use, need carry out transmission delay usually and detect, and directly uses if do not carry out Time delay measurement in advance; Electric system is broken down, can not normally use; Heavy then cause the large-area power-cuts of electric system, influence people's normal life and work.
Merge cells is the new equipment that behind intelligent grid and intelligent substation, occurs; Measurement to the merge cells time-delay at present mainly contains dual mode; A kind of is the markers of hardware unit record merge cells input signal and output signal, calculates the time-delay that draws merge cells through contrast; A kind of is to cooperate with wave recording device through status signal to calculate the merge cells time-delay.
Before a kind of mode be combined all input/output signals in unit and add markers and markers contrast operation, data volume is big, the test result dispersion is big, does not utilize the judge of test result.
A kind of mode in back, the status signal and the synchronism of analog quantity output and the punctual precision of wave recording device directly have influence on precision of test result, bring uncertain factor for the accuracy of test result.
The object of the invention is exactly the deficiency that overcomes above method of testing; Principle of work to merge cells; Design that a kind of time precision that is applicable to test merge cells transmission delay is high, simple in structure, easy to use, test result is judged test macro and method of testing accurately, help the user efficiently, reasonably to be combined the unit and delay time and make rational judgement and evaluation.
At present, the method to the merge cells Time delay measurement mainly contains two kinds.
A kind of is the markers of hardware unit record merge cells input signal and output signal, and compares calculating, draws the time-delay of merge cells.This mode calculated amount is big, and the test result data amount is big, is not easy to the tester and carries out the test result evaluation, for example; Sampled value SF commonly used is 80 at present, concerning the system of a 50Hz, has 4000 data transmission in the per second; Also will produce 4000 Time delay measurement results, the test result dispersion is big, and the value mode to measurement result is different so; Maximum error value for example, average error and root-mean-square error value can exert an influence to evaluation result.
Another kind of is exactly to start wave recording device through status signal to be combined the unit input and output signal and to record the mode of ripple in real time and be combined the unit time-delay and detect; The synchronism of status signal and analog quantity output and the punctual precision of wave recording device directly have influence on precision of test result in this method, bring uncertain factor for the accuracy of test result.
Summary of the invention
The purpose of the utility model provides a kind of merge cells sampled value Time delay measurement system, improves measuring accuracy.
Be to realize above-mentioned purpose, the technical scheme that the utility model adopts is: a kind of merge cells sampled value Time delay measurement system, and it comprises signal generator, message accounting unit, time signal and delay measuring unit; Described signal generator is used at whole second constantly to tested merge cells input sample signal; Described message accounting unit is used to receive the network message of tested merge cells output, receives the time of tested merge cells network message to the delay measuring unit transmission; Described delay measuring unit is used to calculate the message accounting unit and receives the time of tested merge cells network message and whole second the time interval; Described time signal unit is used for to signal generator and message accounting unit temporal information being provided.
Described signal generator is for inserting the relay-protection tester of pulse or IRIG-B sign indicating number or IEEE 1588 time signals.
The time signal that time signal that described message accounting unit inserts and signal generator insert is same time signal.
The test macro of the utility model adopts the high precision time signal to carry out time synchronized; And signal output time and message use same time signal source the time of reception, eliminated different output times that caused of time signal and the time error of the time of reception, and this time error are to calculating the error that delay time causes; Time-delay between the message that the message through calculating the input merge cells and merge cells are exported; Calculate the time-delay of merge cells sampled value, data recorded is simple, calculates accurately.
Description of drawings
Fig. 1 is the structural representation block diagram of the utility model;
Fig. 2 is the test flow chart of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
As shown in Figure 1, a kind of sampled value Time delay measurement system of the utility model, it comprises signal generator 1, message accounting unit 2, time signal and delay measuring unit 3.Described signal generator 1 is used for whole second constantly to the single 4 yuan of input sample signals of tested mergings, and sampled signal is a digital signal, for example the communication message of IEC60044-8, IEC61850-9-1 or IEC61850-9-2 form.Signal generator is for inserting the relay-protection tester of pulse or IRIG-B sign indicating number or IEEE 1588 equal time signals, and this relay-protection tester can be arranged on the moment output sampled value of regulation.Message accounting unit 2 is used to receive the network message of tested merge cells 4 outputs, transmits the time that receives tested merge cells network message to delay measuring unit 3.This message accounting unit 2 can accept pulse, IRIG-B sign indicating number or IEEE 1588 time signals to the time pen recorder, the precise time in the time of can the recorder message like the fault oscillograph, can certainly be the pen recorder of other high time precisions.Described delay measuring unit 3 is used to calculate message accounting unit 2 and receives the time of tested merge cells 4 network messages and whole second the time interval; Described time signal unit is used for to signal generator 1 and message accounting Unit 2 temporal information being provided.The time signal that time signal that the message accounting unit inserts and signal generator insert is same time signal, to guarantee output time and record time precision consistance constantly.When reality was tested, the time signal that time signal that message accounting unit 2 inserts and signal generator 1 insert was same time signal, to guarantee output time and record time precision consistance constantly.
Time-delay between the first frame message of the first frame message of this method of testing through calculating the input merge cells and merge cells output is calculated the merge cells sampled value and is delayed time.Each data recorded is simple, calculates accurately.Can be through the method for repeatedly testing, the stability of check merge cells sampled value time-delay.
As shown in Figure 2, the testing process of the utility model is following:
The first step: at first time signal is inserted signal generator 1, message accounting unit 2.Signal generator and message accounting unit insert same time signal, to guarantee output time and record time precision consistance constantly.
Second step: in the moment of setting signal generator 1 output sampled value, be set at whole second constantly, and output duration is 1 second.
The 3rd step: signal generator 1 is in the moment output sampled value of setting, and sampled value can be the for example communication message of forms such as IEC60044-8, IEC61850-9-1 or IEC61850-9-2.
The 4th step: tested merge cells 4 is handled signal after receiving the sampled value of signal generator 1 output, and output corresponding communication message.
The 5th step: after message accounting unit 2 receives the first frame message that tested merge cells 4 sends, the immediate record time this moment, and this time sent to delay measuring unit 3.
The 6th step: after delay measuring unit 3 receives the time of message accounting unit record, calculate the time-delay between this time and whole second time, draw the transfer delay of merge cells.
1) simple in structure, easy to operate.This test macro whole operation and as a result deterministic process need not the professional person monitoring.
2) time precision is high.This test macro adopts the high precision time signal to carry out time synchronized; And signal output time and message use same time signal source the time of reception; Eliminated different output times that caused of time signal and the time error of the time of reception, and this time error is to calculating the error that delay time causes.
3) test result data is simple, accurately.Time-delay between the first frame message of the first frame message of this method of testing through calculating the input merge cells and merge cells output is calculated the merge cells sampled value and is delayed time.Each data recorded is simple, calculates accurately.Can be through the method for repeatedly testing, the stability of check merge cells sampled value time-delay.
4) intelligent interpretation of result.This test macro calculates the merge cells delay time automatically, need not manual intervention.
Claims (3)
1. a merge cells sampled value Time delay measurement system is characterized in that it comprises signal generator, message accounting unit, time signal and delay measuring unit; Described signal generator is used at whole second constantly to tested merge cells input sample signal; Described message accounting unit is used to receive the network message of tested merge cells output, receives the time of tested merge cells network message to the delay measuring unit transmission; Described delay measuring unit is used to calculate the message accounting unit and receives the time of tested merge cells network message and whole second the time interval; Described time signal unit is used for to signal generator and message accounting unit temporal information being provided.
2. according to the described a kind of merge cells sampled value Time delay measurement of claim 1 system, it is characterized in that described signal generator is for inserting the relay-protection tester of pulse or IRIG-B sign indicating number or IEEE 1588 time signals.
3. according to the described a kind of merge cells sampled value Time delay measurement of claim 1 system, it is characterized in that the time signal that described message accounting unit inserts is same time signal with the time signal of signal generator access.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011205027074U CN202383278U (en) | 2011-12-07 | 2011-12-07 | Merging unit sampling value time delay measuring system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777104A (en) * | 2014-02-24 | 2014-05-07 | 国家电网公司 | Time-delay characteristic testing device and method of digital substation secondary signal transmission system |
| CN103837771A (en) * | 2014-02-28 | 2014-06-04 | 倪兆瑞 | Merging unit time delay parameter measurement method of conventional mutual inductor |
| CN104020375A (en) * | 2014-06-11 | 2014-09-03 | 贵州电力试验研究院 | Device and method for detecting time parameters of intelligent substation merging units |
| CN104360298A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Performance test system and method for merging unit tester |
| CN105785085A (en) * | 2016-04-14 | 2016-07-20 | 云南电网有限责任公司电力科学研究院 | Merging unit detection analog source based on synchronous clock signal, and output method thereof |
| CN107741549A (en) * | 2017-11-24 | 2018-02-27 | 国网四川省电力公司成都供电公司 | The intelligent substation synchronism tester synchronously occurred based on analog quantity and digital quantity |
| CN107797052A (en) * | 2016-08-31 | 2018-03-13 | 南京南瑞继保电气有限公司 | String supplementary set Chinese style acquisition system protection act delay measurement system and method |
| CN107942280A (en) * | 2018-01-03 | 2018-04-20 | 中国电力科学研究院有限公司 | A kind of method and system for being calibrated to the absolute delay time |
| CN110231586A (en) * | 2019-04-11 | 2019-09-13 | 浙江三辰电器股份有限公司 | The application method of mutual inductor gamut self-calibrating device |
| CN111141967A (en) * | 2019-10-28 | 2020-05-12 | 许昌开普检测研究院股份有限公司 | Method and system for testing test error of merging unit of power system |
-
2011
- 2011-12-07 CN CN2011205027074U patent/CN202383278U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777104A (en) * | 2014-02-24 | 2014-05-07 | 国家电网公司 | Time-delay characteristic testing device and method of digital substation secondary signal transmission system |
| CN103777104B (en) * | 2014-02-24 | 2016-11-23 | 国家电网公司 | Digitalized substation secondary signal transmission system time-delay characteristics test device and method |
| CN103837771A (en) * | 2014-02-28 | 2014-06-04 | 倪兆瑞 | Merging unit time delay parameter measurement method of conventional mutual inductor |
| CN104020375A (en) * | 2014-06-11 | 2014-09-03 | 贵州电力试验研究院 | Device and method for detecting time parameters of intelligent substation merging units |
| CN104360298A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Performance test system and method for merging unit tester |
| CN105785085A (en) * | 2016-04-14 | 2016-07-20 | 云南电网有限责任公司电力科学研究院 | Merging unit detection analog source based on synchronous clock signal, and output method thereof |
| CN107797052A (en) * | 2016-08-31 | 2018-03-13 | 南京南瑞继保电气有限公司 | String supplementary set Chinese style acquisition system protection act delay measurement system and method |
| CN107741549A (en) * | 2017-11-24 | 2018-02-27 | 国网四川省电力公司成都供电公司 | The intelligent substation synchronism tester synchronously occurred based on analog quantity and digital quantity |
| CN107942280A (en) * | 2018-01-03 | 2018-04-20 | 中国电力科学研究院有限公司 | A kind of method and system for being calibrated to the absolute delay time |
| CN110231586A (en) * | 2019-04-11 | 2019-09-13 | 浙江三辰电器股份有限公司 | The application method of mutual inductor gamut self-calibrating device |
| CN111141967A (en) * | 2019-10-28 | 2020-05-12 | 许昌开普检测研究院股份有限公司 | Method and system for testing test error of merging unit of power system |
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Address after: 401123 office complex, No. 80, Mount Huangshan Road, Yubei District, Chongqing Patentee after: Chongqing Electric Power Corp., China Electric Power Research Institute Patentee after: XUCHANG KETOP DETECTION TECHNOLOGY CO., LTD. Address before: 401123 office complex, No. 80, Mount Huangshan Road, Yubei District, Chongqing Patentee before: Chongqing Electric Power Corp., China Electric Power Research Institute Patentee before: Xuchang Ketop Electric Testing Institute |
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Address after: 401123 office complex, No. 80, Mount Huangshan Road, Yubei District, Chongqing Co-patentee after: Xuchang general testing & Research Institute Limited by Share Ltd Patentee after: Chongqing Electric Power Corp., China Electric Power Research Institute Address before: 401123 office complex, No. 80, Mount Huangshan Road, Yubei District, Chongqing Co-patentee before: XUCHANG KETOP DETECTION TECHNOLOGY CO., LTD. Patentee before: Chongqing Electric Power Corp., China Electric Power Research Institute |
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Granted publication date: 20120815 |