CN107238768A - A kind of direct current protecting time on-site calibration device and method based on same clock source - Google Patents
A kind of direct current protecting time on-site calibration device and method based on same clock source Download PDFInfo
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- CN107238768A CN107238768A CN201710338235.5A CN201710338235A CN107238768A CN 107238768 A CN107238768 A CN 107238768A CN 201710338235 A CN201710338235 A CN 201710338235A CN 107238768 A CN107238768 A CN 107238768A
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- direct current
- time
- current protecting
- clock source
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses a kind of direct current protecting time on-site calibration device based on same clock source and method; dosage unit and actuating signal collecting unit are tested in the device by same clock source time service; test dosage unit is used to apply verified direct current protecting test volume and records the test information for including the time, and actuating signal collecting unit is used to gather the verified direct current protecting action message for including the time.Method and step includes：Test volume application time and verified direct current protecting actuation time are recorded, the time difference between the two is calculated, by comparing time difference and time definite value, judges whether verified direct current protecting time check passes through.The present invention can effectively solve what is put into operation（It is special）The direct current protecting time of high voltage direct current transmission project can not field-checking the problem of, have the advantages that directly perceived, easy to implement, cost is relatively low, security risk is small, applied widely.
Description
Technical field
The present invention relates to electrical engineering technology, and in particular to a kind of live school of the direct current protecting time based on same clock source
Experiment device and method.
Background technology
As the important means of trans-regional a wide range of resource distribution,（It is special）D.C. high voltage transmission has turned into national energy strategy
Important component.It is existing large quantities of nearly ten years（It is special）HVDC transmission system builds up and put into operation in succession, is ensureing the energy
Important function is played in terms of supply, Optimization of Energy Structure and transformation energy development pattern, the shadow in national economy, people's lives
Sound is increasingly great.Ensure（It is special）The working condition of D.C. high voltage transmission nucleus equipment-direct current protecting equipment is normal, to improving
（It is special）The reliability of D.C. high voltage transmission is significant.
It is daily that the field-checking technology simulated based on secondary singal is widely used in AC system secondary device already
In maintenance work, and the operation maintenance empirical evidence for passing through many decades is to improve the maximally effective means of secondary device reliability.Mesh
The preceding field test technology simulated based on secondary singal has been applied to direct current protecting equipment, achieves good effect.However,
It is different from harmonics, due to direct current protecting action behavior and it is indirect switch is acted in the form of switching value, but pass through
The equipment such as control system control converter valve, it is impossible to when being acted by the method field-checking direct current protecting of harmonics field-checking
Between.Existing direct current protecting on-site calibrating method is not directed to direct current protecting time check content mostly, and minority refers to direct current protecting
Time check, also can only checkout action sequential.Due to lack a kind of device of effective direct current protecting time field-checking and
Method so that direct current protecting actuation time put into operation after can not just verify, to what is put into operation（It is special）High voltage direct current transmission project, especially
It is the more long high voltage direct current transmission project that puts into operation, brings hidden trouble.
It is existing to be related to what is put into operation（It is special）The direct current protecting time on-site calibration device of high voltage direct current transmission project and side
Method is seldom：A kind of HVDC protection system for field as disclosed in Application No. CN201610288482.4 Chinese patent literature
Method of calibration and device, by calculating the time difference of two kinds of actuating signals of same protection, verify protection act sequential indirectly；Such as Shen
Please number for CN201410194153.4 Chinese patent literature disclosed in a kind of direct current protecting method of calibration, do not refer to direct current protect
The verification of shield time；A kind of direct current protecting verification side as disclosed in Application No. CN201410194153.4 Chinese patent literature
Method, does not refer to the verification of direct current protecting time；One as disclosed in the Chinese patent literature of Application No. 201610940761.4
The check method of direct current protecting definite value is planted, passes through the school that EMTDC emulation platforms carry out guard time definite value in laboratory environments
Core, carries out verification widely different, it is impossible to be used for the field-checking of direct current protecting time with scene to actual DC protection equipment.
The content of the invention
The technical problem to be solved in the present invention：Above mentioned problem for prior art can effectively solve to have thrown there is provided one kind
Fortune（It is special）The direct current protecting time of high voltage direct current transmission project can not field-checking the problem of, directly perceived, easy to implement, cost compared with
Low, security risk is small, direct current protecting time on-site calibration device and method applied widely based on same clock source.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
On the one hand, the present invention provides a kind of direct current protecting time on-site calibration device based on same clock source, including during standard
Zhong Yuan, test dosage unit and actuating signal collecting unit, the output end of the standard clock source is respectively with testing dosage unit
It is connected to be that test dosage unit and actuating signal collecting unit provide clock source time service, the survey with actuating signal collecting unit
Examination dosage unit output end be connected with verified direct current protecting, the input of the actuating signal collecting unit with it is verified
Direct current protecting be connected.
Preferably, the current conversion station standard time clock of current conversion station where the standard clock source uses verified direct current protecting
Source.
Preferably, the actuating signal collecting unit is supervised using the Converter Station of current conversion station where verified direct current protecting
Control system.
On the one hand, the present invention also provides a kind of based on the foregoing direct current protecting time field-checking dress based on same clock source
The direct current protecting time on-site calibrating method based on same clock source put, implementation steps include：
1）B code time services are passed through for test dosage unit, actuating signal collecting unit by standard clock source；
2）By measure dosage unit apply test volume to verified direct current protecting equipment and record apply test volume time
t1；
3）Direct current protecting action message is observed by actuating signal collecting unit, the action of direct current protecting switching system signal is recorded
Time t2, the actuation time t3 of direct current protecting locking direct current signal, the actuation time t4 of direct current protecting alarm signal；
4）The time t1 of calculating application test volume, the very first times of the actuation time t4 of direct current protecting alarm signal between the two are poor
△ t1, calculate apply the time t1 of test volume, direct current protecting switching system signal actuation time t2 between the two second when
Between difference △ t2, calculate apply the time t1 of test volume, direct current protecting locking direct current signal actuation time t3 between the two the
Three time difference △ t3；
5）Judge that the departure between very first time difference △ t1 and direct current protecting alarm time definite value is no more than the first prescribed skew
Threshold value, the departure between the second time difference △ t2 and direct current protecting switching system time definite value is no more than the second prescribed skew
Departure between threshold value, the 3rd time difference △ t3 and direct current protecting locking direct current time definite value is no more than the 3rd prescribed skew
Whether threshold value three sets up simultaneously, if three sets up simultaneously, judges that verified direct current protecting time check passes through, no
Then judge that direct current protecting time check does not pass through.
Preferably, step 5）In the first prescribed skew threshold value be 300ms, the second prescribed skew threshold value is 50ms, the
Three prescribed skew threshold values are 50ms.
Direct current protecting time on-site calibration device tool of the present invention based on same clock source has the advantage that：The present invention includes
Standard clock source, test dosage unit and actuating signal collecting unit, the output end of standard clock source is respectively with testing dosage list
Member is connected with actuating signal collecting unit to be that test dosage unit and actuating signal collecting unit provide clock source time service, tests
The output end of dosage unit is connected with verified direct current protecting, the input of actuating signal collecting unit and verified direct current
Protection is connected, and so as to be the present invention, the direct current protecting time on-site calibrating method based on same clock source provides hardware device,
It can effectively solve what is put into operation（It is special）The direct current protecting time of high voltage direct current transmission project can not field-checking the problem of, with straight
See, easy to implement, cost is relatively low, security risk is small, advantage applied widely.
Direct current protecting time on-site calibrating method tool of the present invention based on same clock source has the advantage that：The present invention is based on
The direct current protecting time on-site calibrating method of same clock source is at direct current protecting time scene of the present invention based on same clock source
On the basis of calibration equipment, by by measure dosage unit apply test volume to verified direct current protecting equipment and record apply
Plus the time t1 of test volume, direct current protecting action message, record direct current protecting switching system are observed by actuating signal collecting unit
Unite the actuation time t2 of signal, the actuation time t3 of direct current protecting locking direct current signal, the action of direct current protecting alarm signal when
Between t4, be then based on above- mentioned information carry out calculating processing, judge whether verified direct current protecting time check passes through, can be effective
Solve what is put into operation（It is special）The direct current protecting time of high voltage direct current transmission project can not field-checking the problem of, with directly perceived, easy
In implementation, cost is relatively low, security risk is small, advantage applied widely.
Brief description of the drawings
Fig. 1 is the application structure schematic diagram of device of the embodiment of the present invention.
Fig. 2 is the schematic flow sheet of present invention method.
Embodiment
Hereafter will be right exemplified by carrying out guard time field-checking to certain valve DC differential protection of ± 500kV current conversion stations pole 1
Direct current protecting time on-site calibration device of the invention based on same clock source is illustrated with method.The valve direct current of pole 1 is differential to be protected
Shield related criteria only includes a The Rogowski Optical Current Transformer Measurement channel and a zero-flux current transformer Measurement channel.Pole
The Protection criteria of 1 valve DC differential protection system is divided into two kinds of alarm, locking, wherein alarm criterion is：VDCDP_IVALVE_
DIFF >90A, delay 4s alarms（VDCDP _ALARM）；Locking criterion is VDCDP_ IVALVE_DIFF -0.2 × IDNC>
1200A, then be delayed 2ms switching systems（VDCDP_SS）, then the 15ms lockings direct current (VDCDP_TRIP) that is delayed.Wherein VDCDP_
IVALVE_DIFF=IDP-IDNC, IDP are that valve Room pole bus exports electric current（It is derived from valve Room high pressure side pole bus photoelectrical current
Transformer P1.U.T1）, IDNC is that valve Room neutral bus exports electric current（It is derived from valve Room low-pressure side neutral bus Zero flux electric current mutual
Sensor P1.U.T11）.Valve DC differential protection alarm actuation time definite value error in the station pole 1 is no more than 300ms, switching system,
Locking direct current actuation time definite value error is no more than 50ms.
As shown in figure 1, when direct current protecting time on-site calibration device of the present embodiment based on same clock source includes standard
Clock source 1, test dosage unit 2 and actuating signal collecting unit 3, the output end of standard clock source 1 is respectively with testing dosage unit 2
It is connected with actuating signal collecting unit 3 to be that test dosage unit 2 and actuating signal collecting unit 3 provide clock source time service, surveys
The output end of examination dosage unit 2 is connected with verified direct current protecting, the input of actuating signal collecting unit 3 and verified
Direct current protecting is connected.Test dosage unit 2 is used to apply verified direct current protecting test volume and records the survey for including the time
Try information（Including test numerical quantity and application time）, it is verified comprising the time that actuating signal collecting unit 3 is used for collection
Direct current protecting action message（Protect title, protection act type and operating time of protection）.The present embodiment is based on same clock source
Direct current protecting time on-site calibration device by 1 pair of standard clock source test dosage unit 2 and the unification of actuating signal collecting unit 3
Time service, test dosage unit 2 applies test volume, the record quilt of actuating signal collecting unit 3 to verified valve DC differential protection
The action message of the valve DC differential protection of verification.
In the present embodiment, where standard clock source 1 uses verified direct current protecting during the current conversion station standard of current conversion station
Zhong Yuan；The Converter Station monitoring system of current conversion station where actuating signal collecting unit 3 uses verified direct current protecting.
The implementation steps of direct current protecting time on-site calibrating method of the present embodiment based on same clock source include：
1）B code time services are passed through for test dosage unit 2, actuating signal collecting unit 3 by standard clock source 1；
2）By measure dosage unit 2 apply test volume to verified direct current protecting equipment and record apply test volume time
t1；In the present embodiment, the equivalent sub-value of test volume applied by measuring dosage unit 2 is IDP=1500A, IDNC=100A, is applied
Plus the time t1 of test volume is 12:04:14.876；
3）Direct current protecting action message is observed by actuating signal collecting unit 3, the dynamic of direct current protecting switching system signal is recorded
Make time t2, the actuation time t3 of direct current protecting locking direct current signal, the actuation time t4 of direct current protecting alarm signal；This implementation
In example, the valve DC differential protection action message of pole 1 is observed by actuating signal collecting unit 3, the valve DC differential protection of pole 1 is recorded
The actuation time of switching system signal, the actuation time of the valve DC differential protection locking direct current signal of pole 1, the valve direct current of pole 1 are differential
The actuation time of protection alarm signal, wherein the actuation time t2 of the valve DC differential protection switching system signal of pole 1 are 12:04:
14.898th, the actuation time t3 of the valve DC differential protection locking direct current signal of pole 1 is 12:04:14.913rd, the valve direct current of pole 1 is differential
The actuation time t4 of protection alarm signal is 12:04:18.912；
4）The time t1 of calculating application test volume, the very first times of the actuation time t4 of direct current protecting alarm signal between the two are poor
△ t1, calculate apply the time t1 of test volume, direct current protecting switching system signal actuation time t2 between the two second when
Between difference △ t2, calculate apply the time t1 of test volume, direct current protecting locking direct current signal actuation time t3 between the two the
Three time difference △ t3；In the present embodiment, calculate apply the time t1 of test volume, the valve DC differential protection alarm signal of pole 1 it is dynamic
The very first times of the time t4 of work between the two are poor, calculate the time t1 for applying test volume, the valve DC differential protection switching system of pole 1
The second time differences of the actuation time t2 of signal between the two, calculate time t1, the valve DC differential protection of pole 1 for applying test volume
The 3rd time differences of the actuation time t3 of locking direct current signal between the two, the wherein very first time difference are 4036ms, the second time
Difference is 22ms, and the 3rd time difference was 37ms；
5）Judge that the departure between very first time difference △ t1 and direct current protecting alarm time definite value is no more than the first prescribed skew
Threshold value, the departure between the second time difference △ t2 and direct current protecting switching system time definite value is no more than the second prescribed skew
Departure between threshold value, the 3rd time difference △ t3 and direct current protecting locking direct current time definite value is no more than the 3rd prescribed skew
Whether threshold value three sets up simultaneously, if three sets up simultaneously, judges that verified direct current protecting time check passes through, no
Then judge that direct current protecting time check does not pass through.
In the present embodiment, step 5）In the first prescribed skew threshold value be 300ms, the second prescribed skew threshold value is
50ms, the 3rd prescribed skew threshold value is 50ms.Through judging very first time difference and the valve DC differential protection alarm time definite value of pole 1
Departure be 36ms, no more than the first prescribed skew threshold value 300ms；Second time difference and the valve DC differential protection of pole 1 are cut
Change the departure of system time definite value and be no more than the second prescribed skew threshold value 50ms for 20ms；3rd time difference and the valve of pole 1 are straight
Flow the departure of differential protection locking direct current time definite value and be no more than the 3rd prescribed skew threshold value 50ms for 20ms.Above-mentioned three
Set up simultaneously, therefore, judge that the verified valve DC differential protection time check of pole 1 passes through, illustrate the differential guarantor of the valve direct current of pole 1
The shield time is normal.
Described above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of direct current protecting time on-site calibration device based on same clock source, it is characterised in that：Including standard clock source
（1）, test dosage unit（2）With actuating signal collecting unit（3）, the standard clock source（1）Output end respectively with test
Dosage unit（2）With actuating signal collecting unit（3）It is connected and thinks test dosage unit（2）With actuating signal collecting unit（3）
Clock source time service, the test dosage unit are provided（2）Output end be connected with verified direct current protecting, the actuating signal
Collecting unit（3）Input be connected with verified direct current protecting.
2. the direct current protecting time on-site calibration device according to claim 1 based on same clock source, it is characterised in that：
The standard clock source（1）Using the current conversion station standard clock source of current conversion station where verified direct current protecting.
3. the direct current protecting time on-site calibration device according to claim 1 based on same clock source, it is characterised in that：
The actuating signal collecting unit（3）Using the Converter Station monitoring system of current conversion station where verified direct current protecting.
4. a kind of base based on the direct current protecting time on-site calibration device based on same clock source described in claim 1 or 2 or 3
In the direct current protecting time on-site calibrating method of same clock source, it is characterised in that implementation steps include：
1）Pass through standard clock source（1）For test dosage unit（2）, actuating signal collecting unit（3）Pass through B code time services；
2）By measuring dosage unit（2）Apply test volume to verified direct current protecting equipment and record apply test volume when
Between t1；
3）Pass through actuating signal collecting unit（3）Direct current protecting action message is observed, record direct current protecting switching system signal
Actuation time t2, the actuation time t3 of direct current protecting locking direct current signal, the actuation time t4 of direct current protecting alarm signal；
4）The time t1 of calculating application test volume, the very first times of the actuation time t4 of direct current protecting alarm signal between the two are poor
△ t1, calculate apply the time t1 of test volume, direct current protecting switching system signal actuation time t2 between the two second when
Between difference △ t2, calculate apply the time t1 of test volume, direct current protecting locking direct current signal actuation time t3 between the two the
Three time difference △ t3；
5）Judge that the departure between very first time difference △ t1 and direct current protecting alarm time definite value is no more than the first prescribed skew
Threshold value, the departure between the second time difference △ t2 and direct current protecting switching system time definite value is no more than the second prescribed skew
Departure between threshold value, the 3rd time difference △ t3 and direct current protecting locking direct current time definite value is no more than the 3rd prescribed skew
Whether threshold value three sets up simultaneously, if three sets up simultaneously, judges that verified direct current protecting time check passes through, no
Then judge that direct current protecting time check does not pass through.
5. the direct current protecting time on-site calibrating method according to claim 4 based on same clock source, it is characterised in that：
Step 5）In the first prescribed skew threshold value be 300ms, the second prescribed skew threshold value be 50ms, the 3rd prescribed skew threshold value
For 50ms.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710338235.5A CN107238768A (en) | 2017-05-15 | 2017-05-15 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338235.5A CN107238768A (en) | 2017-05-15 | 2017-05-15 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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| CN201710338235.5A Pending CN107238768A (en) | 2017-05-15 | 2017-05-15 | A kind of direct current protecting time on-site calibration device and method based on same clock source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108680819A (en) * | 2018-05-24 | 2018-10-19 | 国网河南省电力公司检修公司 | A kind of change of current becomes protection exit circuit and matrix test method |
| CN108711821A (en) * | 2018-04-12 | 2018-10-26 | 广东电网有限责任公司 | A kind of flexible direct current bridge arm differential protection automatic test approach |
| CN108776301A (en) * | 2018-05-03 | 2018-11-09 | 国网湖南省电力有限公司 | The fast switch-dividing calibration equipment of direct current and its method of calibration |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711821A (en) * | 2018-04-12 | 2018-10-26 | 广东电网有限责任公司 | A kind of flexible direct current bridge arm differential protection automatic test approach |
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| CN108680819A (en) * | 2018-05-24 | 2018-10-19 | 国网河南省电力公司检修公司 | A kind of change of current becomes protection exit circuit and matrix test method |
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Application publication date: 20171010 |