CN101930064A - Delay measuring method of merging unit and system thereof - Google Patents
Delay measuring method of merging unit and system thereof Download PDFInfo
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- CN101930064A CN101930064A CN200910053661XA CN200910053661A CN101930064A CN 101930064 A CN101930064 A CN 101930064A CN 200910053661X A CN200910053661X A CN 200910053661XA CN 200910053661 A CN200910053661 A CN 200910053661A CN 101930064 A CN101930064 A CN 101930064A
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Abstract
The invention discloses a delay measuring method of a merging unit and a system thereof. The delay measuring system comprises a signal source output device, a recording device and a delay measuring unit, wherein, the signal source output device is used for outputting an analog value signal and a switching value signal, the switching value signal is switched in the recording device, and the analog value signal is converted into a digital signal, then switched in the merging unit and switched in the recording device through the merging unit; the recording device is used for recording wave forms of the received analog value signal and the switching value signal; and the delay measuring unit is used for acquiring delay data of the merging unit according to wave form information recorded by the recording device. The delay measuring method of the merging unit and the system thereof can help measure signal conversion delay of the merging units of different models and different manufacturers accurately and solve the problem that different merging units generate phase errors on differential protection and other relevant secondary equipment during the use process to cause abnormal operation or protection misoperation.
Description
Technical field
The present invention relates to a kind of merge cells of electronic current mutual inductor, relate in particular to a kind of merge cells Time delay measurement method; In addition, the invention still further relates to a kind of merge cells Time delay measurement system.
Background technology
Electronic mutual inductor is incited somebody to action big electric current once; voltage signal converts the little analog quantity of secondary to; and realize on the spot collection, the current and voltage signals by transmission of digital enters combiner, carries out data transmission to devices such as protecting observing and controlling combiner place uniform packing after.
Electronic current mutual inductor adopts the ultimate principle of sieve Koffsky (Rogowski) coil and underloading coil.There is not the magnetic saturation phenomenon in the Rogowski coil owing to adopt nonmagnetic skeleton.Primary current has obtained and the proportional secondary voltage of the time diffusion of primary current by the Rogowski coil, this secondary voltage is carried out Integral Processing, obtain and the proportional voltage signal of primary current, by microprocessor this signal is carried out conversion, processing, primary current information can be become the output of analog quantity and digital quantity.The underloading coil is being represented the developing direction of classical induction current mutual inductor; It is made up of winding, little iron core and the minimized Secondary Winding of loss.Connecting shunt resistance on the Secondary Winding, secondary current is proportional at the voltage drop and the primary current at shunting electricity group Ra two ends, and electronic current mutual inductor has bigger current measuring range than traditional electromagnetic current transducer.
Electronic type voltage transformer adopts the electric resistance partial pressure principle.Mutual inductor is made up of high-voltage arm resistance, low-voltage arm resistance, guarded electrode, overvoltage protection.By voltage divider primary voltage is converted to and primary voltage and the proportional small voltage signal of phase place.The method of employing guarded electrode is improved the influence of Electric Field Distribution situation and stray capacitance, at secondary output terminal overvoltage protection in parallel, prevents from when the secondary output terminal is opened a way secondary side voltage to be improved; Also can adopt the principle of electric capacity (capacitance-resistance) dividing potential drop to make electronic type voltage transformer.
Compare the conventional current mutual inductor; the electronic current mutual inductor output signal has increased a merge cells link between control protection equipment; the existence of this link; the current signal that can make secondary device receive is compared an actual signal by a time-delay; and the big young pathbreaker of this time-delay directly has influence on the correct work of protection and metering outfit; simultaneously; when being used for the merge cells of a plurality of different model different manufacturers; also need accurately to measure the time-delay of different device; and in relevant protection equipment, revise, in case because the merge cells time-delay causes differential protection malfunction.
Merge cells defines at the electronic mutual inductor of digitizing output, and its major function is synchronous acquisition three-phase current and information of voltage, and gathers according to certain form and to export to the second protection opertaing device.See also Fig. 2, merge cells mainly comprises synchronizing function module, Data Receiving and processing module, data configuration and communication module and Ethernet sending module.Among Fig. 2, merge cells adopts 32 bit DSP processors, and its frequency of operation is 600MHz.Its major function is the numerical information that reception synchronously and the signals collecting plug-in unit of handling multichannel secondary converter transmit, and the form according to standard code after gathering externally provides digital data in real time with high fidelity.
In the occasion of using electronic mutual inductor; perhaps the analog signals transmission is adopted in the digitalized network Digitized Transmission transformer station; merge cells is the intermediate conversion unit that electronic mutual inductor signal (perhaps 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; merge cells also can be regarded as the part of mutual inductor, and the time-delay that conversion of signals produces in the merge cells is equivalent to mutual inductor once and the angular difference between the secondary (being phase differential).Generally, for its angular difference of mutual inductor itself strict regulation is arranged, to cooperate the application of relevant secondary device, but additional merge cells link does not have strict product regulation, and its time-delay is often much bigger than mutual inductor itself, therefore, in actual applications, need accurately measure its time-delay.Now is not also measured the method for its time-delay.
Summary of the invention
Technical matters to be solved by this invention is: a kind of merge cells Time delay measurement method is provided, can accurately measures the merge cells conversion of signals time-delay of different model different manufacturers.
In addition, the present invention also provides a kind of merge cells Time delay measurement system.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of merge cells Time delay measurement method is in order to measure the time-delay of merge cells; This method comprises the steps:
A, provide a signal source output unit, this signal source output unit is exported analog signals and switching value signal simultaneously;
B, switching value signal access to a pen recorder;
After C, analog signals are converted to digital signal, insert described merge cells, access to described pen recorder through behind the merge cells;
The switching value signal of D, described its reception of recording device records, the waveform of analog signals;
E, obtain the delay data of merge cells according to the shape information of recording device records.
As a preferred embodiment of the present invention, the method of obtaining delay data in the described step e is: be reference point with the switching value displacement on wave recording, be carved into the time-delay between the analog signals variation constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells.
As a preferred embodiment of the present invention, among the step C, described analog signals through a collector after, be converted to digital signal.
As a preferred embodiment of the present invention, described signal source output unit is the reaying protection test instrument.
As a preferred embodiment of the present invention, described pen recorder is for receiving the pen recorder of digitized signal and switching value signal simultaneously.Alternatively, described pen recorder is an oscillograph.
A kind of merge cells Time delay measurement system is in order to measure the time-delay of merge cells; It comprises signal source output unit, pen recorder, delay measuring unit.The signal source output unit is in order to output analog signals and switching value signal; Described switching value signal accesses to a pen recorder; After described analog signals is converted to digital signal, insert described merge cells, access to described pen recorder through behind the merge cells; Pen recorder is in order to the switching value signal that writes down its reception, the waveform of analog signals; Delay measuring unit is in order to obtain the delay data of merge cells according to the shape information of recording device records.
As a preferred embodiment of the present invention, the method that described delay measuring unit is obtained delay data is: be reference point with the switching value displacement on wave recording, be carved into the time-delay between the analog signals variation constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells.
As a preferred embodiment of the present invention, described measuring system also comprises collector, in order to the analog signals of described signal source output unit output is converted to digital signal.
As a preferred embodiment of the present invention, described signal source output unit is the reaying protection test instrument.
As a preferred embodiment of the present invention, described pen recorder is for receiving the pen recorder of digitized signal and switching value signal simultaneously.Alternatively, described pen recorder is an oscillograph.
The present invention uses conventional reaying protection test instrument as signal source; use the analog signals and the switching value signal of output synchronously; wherein analog signals inserts merge cells; the switching value signal is directly received digitized fault oscillograph (or other can receive the pen recorder of digitized signal and switching value signal simultaneously); simultaneously the merge cells output signal is also received fault oscillograph (or other pen recorders); start recording unit; while enabling signal source; export analog signals and switching value signal simultaneously; by the recording device records waveform; be reference point from the wave recording with the switching value displacement; be carved into the time-delay between the analog signals variation constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells.
Beneficial effect of the present invention is: the merge cells Time delay measurement method and system that the present invention proposes, the merge cells conversion of signals time-delay that can accurately measure the different model different manufacturers; And can solve in the different merge cells uses differential protection and other relevant secondary devices are produced phase error and cause the situation or the protection maloperation situation of malfunction.
Description of drawings
Fig. 1 is the composition synoptic diagram of merge cells.
Fig. 2 is the fundamental diagram of merge cells.
Fig. 3 is for measuring the composition synoptic diagram of merge cells delayed time system.
Fig. 4 is for measuring the process flow diagram of merge cells time-delay method.
Embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
See also Fig. 3, the present invention has disclosed a kind of merge cells Time delay measurement system 10, in order to measure the time-delay of merge cells.This Time delay measurement system 10 comprises signal source output unit 11, collector 12, pen recorder 13, delay measuring unit (figure does not show).
Wherein, signal source output unit 11 is in order to synchronous output analog signals and switching value signal; Described switching value signal accesses to described pen recorder 13; Described analog signals inserts described merge cells 20 after collector 12 is converted to digital signal, access to described pen recorder 13 through behind the merge cells 20.In the present embodiment, signal source output unit 11 is the reaying protection test instrument; Certainly, can also select other signal source output units for use.
Delay measuring unit is in order to obtain the delay data of merge cells 20 according to the shape information of pen recorder 13 records.In the present embodiment, its method of obtaining delay data is: be reference point with the switching value displacement on wave recording, be carved into the time-delay of analog signals between changing constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells 20.
More than introduced merge cells Time delay measurement of the present invention system 10, introduced the Time delay measurement method of above-mentioned Time delay measurement system 10 below in conjunction with Fig. 4, this method comprises the steps:
A, provide a signal source output unit 11, this signal source output unit is exported analog signals and switching value signal simultaneously;
B, switching value signal access to a pen recorder 13;
C, analog signals insert described merge cells 20 after collector 12 is converted to digital signal, access to described pen recorder 13 through behind the merge cells 20;
The switching value signal of D, 13 its receptions of record of described pen recorder, the waveform of analog signals;
E, obtain the delay data of merge cells 20 according to the shape information of recording device records.In the present embodiment, the method for obtaining delay data is: be reference point with the switching value displacement on wave recording, be carved into the time-delay of analog signals between changing constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells 20.
In sum; merge cells Time delay measurement method and system of the present invention are accurately being measured the merge cells conversion of signals time-delay of different model different manufacturers, solve in the different merge cells uses differential protection and other relevant secondary devices are produced phase error and cause the situation or the protection maloperation situation of malfunction.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or essential characteristic, and the present invention can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.Under the situation that does not break away from the scope of the invention and spirit, can carry out other distortion and change here to disclosed embodiment.
Claims (10)
1. merge cells Time delay measurement method is in order to measure the time-delay of merge cells; It is characterized in that this method comprises the steps:
A, provide a signal source output unit, this signal source output unit is exported analog signals and switching value signal simultaneously;
B, switching value signal access to a pen recorder;
After C, analog signals are converted to digital signal, insert described merge cells, access to described pen recorder through behind the merge cells;
The switching value signal of D, described its reception of recording device records, the waveform of analog signals;
E, obtain the delay data of merge cells according to the shape information of recording device records.
2. merge cells Time delay measurement method according to claim 1 is characterized in that:
The method of obtaining delay data in the described step e is: be reference point with the switching value displacement on wave recording, be carved into the time-delay of analog signals between changing constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells.
3. merge cells Time delay measurement method according to claim 1 is characterized in that:
Among the step C, described analog signals through a collector after, be converted to digital signal.
4. according to the arbitrary described merge cells Time delay measurement method of claim 1 to 3, it is characterized in that:
Described signal source output unit is the reaying protection test instrument.
5. according to the arbitrary described merge cells Time delay measurement method of claim 1 to 3, it is characterized in that:
Described pen recorder is an oscillograph.
6. merge cells Time delay measurement system is in order to measure the time-delay of merge cells; It is characterized in that it comprises:
The signal source output unit is in order to output analog signals and switching value signal; Described switching value signal accesses to a pen recorder; After described analog signals is converted to digital signal, insert described merge cells, access to described pen recorder through behind the merge cells;
Pen recorder is in order to the switching value signal that writes down its reception, the waveform of analog signals;
Delay measuring unit is in order to obtain the delay data of merge cells according to the shape information of recording device records.
7. merge cells Time delay measurement according to claim 6 system is characterized in that:
The method that described delay measuring unit is obtained delay data is: be reference point with the switching value displacement on wave recording, be carved into the time-delay of analog signals between changing constantly during measuring switch quantitative change position, this time-delay is the data-switching time-delay of merge cells.
8. merge cells Time delay measurement according to claim 6 system is characterized in that:
Described measuring system also comprises collector, in order to the analog signals of described signal source output unit output is converted to digital signal.
9. according to the arbitrary described merge cells Time delay measurement of claim 6 to 8 system, it is characterized in that:
Described signal source output unit is the reaying protection test instrument.
10. according to the arbitrary described merge cells Time delay measurement of claim 6 to 8 system, it is characterized in that:
Described pen recorder is an oscillograph.
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| CN200910053661XA CN101930064A (en) | 2009-06-23 | 2009-06-23 | Delay measuring method of merging unit and system thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495322A (en) * | 2011-12-22 | 2012-06-13 | 山东电力研究院 | Synchronous performance test method for digital relay protection device based on IEC61850 (International Electrotechnical Commission 61850) |
| CN102662152A (en) * | 2012-05-15 | 2012-09-12 | 河南省电力公司济源供电公司 | Electronic type mutual inductor as well as system and method for verifying merging unit |
| CN102761445A (en) * | 2012-07-26 | 2012-10-31 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| CN103558474A (en) * | 2013-11-08 | 2014-02-05 | 国家电网公司 | Novel merging unit verifying device |
| CN103837771A (en) * | 2014-02-28 | 2014-06-04 | 倪兆瑞 | Merging unit time delay parameter measurement method of conventional mutual inductor |
| CN104237833A (en) * | 2013-06-07 | 2014-12-24 | 中国能建集团装备有限公司南京技术中心 | Detector used for cross-testing combiner unit compatibility |
| CN104360298A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Performance test system and method for merging unit tester |
| CN104569587A (en) * | 2014-12-11 | 2015-04-29 | 国家电网公司 | Measurement circuit and method of alternating current sampling value phase error of intelligent substation |
| CN105203875A (en) * | 2015-09-15 | 2015-12-30 | 国家电网公司 | Merging unit rated time delay measuring method based on frequency domain scanning and recognition |
| JP2016057237A (en) * | 2014-09-11 | 2016-04-21 | 富士電機株式会社 | Merging unit, trigger signal output method, and merging unit test system |
| 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 |
| CN109917168A (en) * | 2017-12-13 | 2019-06-21 | 南京南瑞继保电气有限公司 | A kind of laser powered sensor high-speed measuring system and method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495322A (en) * | 2011-12-22 | 2012-06-13 | 山东电力研究院 | Synchronous performance test method for digital relay protection device based on IEC61850 (International Electrotechnical Commission 61850) |
| CN102662152A (en) * | 2012-05-15 | 2012-09-12 | 河南省电力公司济源供电公司 | Electronic type mutual inductor as well as system and method for verifying merging unit |
| CN102761445A (en) * | 2012-07-26 | 2012-10-31 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| CN102761445B (en) * | 2012-07-26 | 2015-04-22 | 广东省电力调度中心 | Processing method after obtaining network transmission delay of transformer substation |
| CN104237833A (en) * | 2013-06-07 | 2014-12-24 | 中国能建集团装备有限公司南京技术中心 | Detector used for cross-testing combiner unit compatibility |
| CN103558474A (en) * | 2013-11-08 | 2014-02-05 | 国家电网公司 | Novel merging unit verifying device |
| CN103837771A (en) * | 2014-02-28 | 2014-06-04 | 倪兆瑞 | Merging unit time delay parameter measurement method of conventional mutual inductor |
| JP2016057237A (en) * | 2014-09-11 | 2016-04-21 | 富士電機株式会社 | Merging unit, trigger signal output method, and merging unit test system |
| CN104360298A (en) * | 2014-11-12 | 2015-02-18 | 国家电网公司 | Performance test system and method for merging unit tester |
| CN104569587A (en) * | 2014-12-11 | 2015-04-29 | 国家电网公司 | Measurement circuit and method of alternating current sampling value phase error of intelligent substation |
| CN104569587B (en) * | 2014-12-11 | 2017-10-20 | 国网江苏省电力公司扬州供电公司 | The measuring circuit and method of intelligent substation alternating data acquisition phase error |
| CN105203875A (en) * | 2015-09-15 | 2015-12-30 | 国家电网公司 | Merging unit rated time delay measuring method based on frequency domain scanning and recognition |
| CN105203875B (en) * | 2015-09-15 | 2018-05-22 | 国家电网公司 | The specified Time delay measurement method of combining unit based on frequency domain scanning recognition |
| 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 |
| CN109917168A (en) * | 2017-12-13 | 2019-06-21 | 南京南瑞继保电气有限公司 | A kind of laser powered sensor high-speed measuring system and method |
| CN109917168B (en) * | 2017-12-13 | 2022-03-29 | 南京南瑞继保电气有限公司 | Laser power supply high-speed measurement system and method |
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Application publication date: 20101229 |