CN104122485A - Recording file based line fault analysis - Google Patents
Recording file based line fault analysis Download PDFInfo
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- CN104122485A CN104122485A CN201410353366.7A CN201410353366A CN104122485A CN 104122485 A CN104122485 A CN 104122485A CN 201410353366 A CN201410353366 A CN 201410353366A CN 104122485 A CN104122485 A CN 104122485A
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Abstract
The invention discloses a comtrade recording file based line fault analysis method. The comtrade recording file based line fault analysis method performs line fault analysis through analog quantity of a comtrade recording file in combination with digital quantity, namely, judging a fault line according to line variation in three-phase current, three-phase voltage and protective actuating signals and extracting information such as a fault phase, an action phase, a fault character, the fault removal time, reclosure action conditions and the like. The comtrade recording file based line fault analysis method can analyze a recording file uploaded by a fault recorder, screen out intra-area fault files and identify key information such as fault equipment, time of fault and protective actions, fault removal time, reclosure action conditions, phase selection, distance measurement and fault current.
Description
Technical field
The present invention is applied in dispatching automation of electric power systems field, particularly electric grid relay protection and failure information system, is specifically related to a kind of line fault analytical approach based on comtrade recorded wave file.
Background technology
During device fails, in the same area, a large amount of protective devices and fault oscillograph start simultaneously, and magnanimity fault data is poured into dispatching control center simultaneously.Yet the information really regulation and control operations staff fault distinguishing being worked is also few, most information is all interfere information.In order to stop " data submerge " hidden danger, filter interfere information, the fault data that the present invention uploads fault oscillograph carries out intellectual analysis, analyzes recorded wave file fault signature, reject the startup file that external area error or load fluctuation cause, filter out troubles inside the sample space file.Assistant regulating and controlling operations staff distinguishes fault type and position fast, shortens the accident treatment time.
Summary of the invention
The object of the invention is after there is electric network fault; the recorded wave file of sending on fault oscillograph is analyzed; filter out troubles inside the sample space file, pick out the key messages such as faulty equipment, time of failure, operating time of protection, fault clearing time, reclosing action situation, phase selection, range finding, fault current.
The present invention specifically by the following technical solutions.
Line fault analytical approach based on recorded wave file, is characterized in that, said method comprising the steps of:
(1) obtain the configuration of essential parameter of circuit and passage, comprise circuit positive sequence resistance, forward-sequence reactance, zero sequence resistance, zero-sequence reactance, line length, circuit three-phase current channel number, circuit three-phase voltage channel number, route protection action channel number, circuit re-switching channel number;
(2) arrange recorder data, three-phase current, three-phase voltage are carried out to one or two sub-value conversions;
(3) calculate a phase of three-phase current amplitude maximum, judge whether this phase circuit has fault, and non-fault line is not analyzed;
(4) with route protection, moving digital quantity (protection action digital quantity protect actuating signal) filters, at least onely protect mutually actuating signal generation displacement, the fault that is judged as this phase circuit is troubles inside the sample space, otherwise is judged as external area error, and external area error circuit is not analyzed;
(5) use three-phase current, the moment of failure judgement starting point;
(6) failure judgement is separate;
(7) according to fault is separate, carry out fault localization calculating;
(8) according to the moment of fault starting point and fault phase electric current, the moment of failure judgement excision point;
(9), according to trouble spot and three-phase current, there is the separate of tripping operation in judgement;
(10) according to trouble spot and fault phase electric current, reclosing signal, judgement reclosing situation.
The present invention can also further adopt following preferred version:
Wherein step (3) further comprises:
1. calculate a phase of three-phase current amplitude maximum, lowest high-current value Imax and the position that occurs maximum current;
2. occur after maximum current, the electric current of continuous two cycles of this phase current is less than Imax/10, judges this phase line fault.
Wherein step (5) further comprises:
1. calculate the poor △ Ixy of three-phase current between two
△ (Ixy)=|| I (xy, k) – I (xy, k-T) |-| I (xy, k-T) – I (xy, k-2T) |, xy refers to that AB, BC, tri-kinds of CA are separate, the current time that k refers to sampling a bit, T is one week sampling number, the sampled value before (k-T) refer to that k orders 1 week, sampled value 2 weeks of (k-2T) ordering from k;
2. continuous T/6 three-phase current poor (△ Ixy) surpasses startup definite value Iqd, judges that k is as fault starting point.
Wherein step (6) further comprises:
1. calculate fault and start front 0.5 cycle three-phase current (Ia_bef, Ib_bef, Ic_bef), 1.5 cycle three-phase currents (Ia_aft, Ib_aft, Ic_aft) after fault starts;
2. calculate fault and start rear 1.5 cycle zero-sequence current I0_aft, if mI0_aft>Ia_aft or mI0_aft>Ib_aft or mI0_aft>Ic_aft, be judged as earth fault, m is tuning coefficient;
③
Calculate phase differential current Sudden Changing Rate △ I
aB, △ I
bCwith △ I
cAwith difference of phase currents △ I
a, △ I
bwith △ I
c, wherein:
△I
AB＝|(Ia_aft-Ia_bef)-(Ib_aft-Ib_bef)|＝|△I
A-△I
B|；
△I
BC＝|(Ib_aft-Ib_bef)-(Ic_aft-Ic_bef)|＝|△I
B-△I
C|；
△I
CA＝|(Ic_aft-Ic_bef)-(Ia_aft-Ia_bef)|＝|△I
C-△I
A|；
If be earth fault:
M △ I
bC< △ I
aBand m △ I
bC< △ I
cA, A phase ground short circuit; M △ I
cA< △ I
aBand m △ I
cA< △ I
bC, B phase ground short circuit;
M △ I
aB< △ I
bCand m △ I
aB< △ I
cA, C phase ground short circuit;
Below do not meet, be judged to be double earthfault, ask the maximal value of three phase differential current Sudden Changing Rates, corresponding two-phase is fault phase with it.
If be ungrounded fault:
M △ I
c< △ I
aand m △ I
c< △ I
b, AB line to line fault;
M △ I
a< △ I
band m △ I
a< △ I
c, BC line to line fault;
M △ I
b< △ I
aand m △ I
b< △ I
c, CA line to line fault;
Below do not meet, be judged to be three-phase fault.
Wherein step (7) further comprises: adopt single end distance measurement impedance method, obtain abort situation.
Wherein step (8) further comprises:
In the sampling section of a recorder data, comtrade file is equal interval sampling, with △ y, is fabs (I
x+1– I
x) the fault phase current curve tangent slope of this position of equivalent description, wherein I
xfor fault phase electric current, when from sampling point position N, when the △ y of a continuous N point is less than the △ limit of setting, can think that N position is exactly failure removal point.
Comtrade is ieee standard electrical power system transient data interchange general format.Standard be the transient-wave that collects of electric system or electric power system model and casualty data document definition a kind of form.This form is intended to provide a kind of data interchange general format that is easy to explanation.IEEE proposed in 1991, and had carried out revision and perfect in 1999.
Wherein step (9) further comprises:
According to method claim (8) Suo Shu, judge successively whether three-phase current exists failure removal point, exist failure removal point to judge that this trips mutually.
Wherein step (10) further comprises:
1. whether computational scheme reclosing signal there is displacement, if there is displacement, and displacement occurs in behind trouble spot, and judgement overlaps, and gets the displacement of reclosing signal the time of coincidence constantly;
If 2. there is coincidence, according to the described method of step (3), detect the rear three-phase current that overlaps and whether have fault, coincidence after-current still has fault to be judged as reclosing failure, and coincidence after-current non-fault is judged as successful reclosing.
The present invention has following beneficial effect:
Occur after electric network fault; analyze recorded wave file fault signature; reject the startup file that external area error or load fluctuation cause; filter out troubles inside the sample space file; distinguish the key messages such as faulty equipment, time of failure, operating time of protection, fault clearing time, reclosing action situation, phase selection, range finding, fault current, improve operations staff's regulation and control level.
Accompanying drawing explanation
Fig. 1 is the process flow diagram that the present invention is based on the line fault analytical approach of recorded wave file.
The relevant record of a certain line of Tu2Wei 220KV transformer station oscillograph waveform.
Embodiment
Below, according to Figure of description and in conjunction with the specific embodiment of a certain circuit C phase earth fault, technical scheme of the present invention is expressed in further detail to (process flow diagram that is illustrated in figure 1 the line fault analytical approach that the present invention is based on recorded wave file), described line fault analytical approach comprises the following steps:
(1) obtain a certain essential parameter of circuit and passage configuration, comprise circuit positive sequence resistance, forward-sequence reactance, zero sequence resistance, zero-sequence reactance, line length, circuit three-phase current channel number (12,13,14), circuit three-phase voltage channel number (0,1,2), route protection action channel number (95,96,97), circuit re-switching channel number (99);
(2) arrange recorder data, three-phase current, three-phase voltage are carried out to one or two sub-value conversions;
(3) calculating one of three-phase current amplitude maximum is C phase mutually, and maximum current is 15.14kA, and the position that occurs maximum current is 763 sampled points; Since 786 sampled points, continuous 2 cycle electric currents are less than 1.514kA, judgement C phase line fault;
(4) with route protection action digital quantity, filter, wherein 2214_PSL603G protection A exports mutually, B exports mutually, C exports signal generation displacement mutually, is judged as troubles inside the sample space;
(5) calculate the poor △ I of three-phase current between two
ab, △ I
bc, △ I
ca, establish and start definite value Iqd=0.5; Since 506 sampled points, continuous 1/6 cycle △ I
bcwith △ I
casurpass 0.5, judge that 506 sampled points are as fault starting point;
(6) calculate front 0.5 cycle of fault and fault and start rear 1.5 cycle three-phase current and zero-sequence currents, get m=6, wherein:
Ia_bef＝-109.78-275.25j，Ib_bef＝-188.46+219.68j，Ic_bef＝292+73.46j
Ia_aft＝15.50-824.71j，Ib_aft＝-201.46+85.55j，Ic_aft＝-1209.98+25335.88j
6I0_aft=-2791.9+49193.46j, is judged as earth fault.
Calculate the poor Sudden Changing Rate △ of three-phase current I
aB=| (Ia_aft-Ia_bef)-(Ib_aft-Ib_bef) |=437,
△I
BC＝|(Ib_aft-Ib_bef)-(Ic_aft-Ic_bef)|＝25440,
△I
CA＝|(Ic_aft-Ic_bef)-(Ia_aft-Ia_bef)|＝25863,
Because 6 △ I
aB< △ I
bCand 6 △ I
aB< △ I
cA, be judged as C phase earth fault.
(7) calculating fault localization result is 1.297 kilometers;
(8) getting △ limit is 0.22, and getting M is a cycle sampling number.From sampled point 790, a continuous cycle C phase current slope is less than △ limit, and judgement sampled point 790 is failure removal point.
(9) according to the described method of step (8), detect successively A, B, C phase current, there is failure removal point in C phase current wherein, and judgement tripping operation is C phase mutually;
(10) there is displacement at sampled point 3139 in reclosing signal, and judgement overlaps, and gets sampled point 3139 time of coincidence constantly corresponding.According to the described method of step (3), the rear C phase current that overlaps detected and still have fault, be judged as reclosing failure.
Applicant has done detailed explanation and description in conjunction with Figure of description and specific embodiment to the present invention; but those skilled in the art should understand that; above embodiment is only the preferred embodiments of the invention; detailed explanation is just in order to help reader to understand better spirit of the present invention; and be not limiting the scope of the invention; on the contrary, any any improvement or modification of doing based on invention spirit of the present invention all should be within protection scope of the present invention.
Claims (9)
1. the line fault analytical approach based on recorded wave file; it is characterized in that: the analog quantity of described method recorded wave file is carried out line fault analysis in conjunction with digital quantity; pass through the variation failure judgement circuit of circuit three-phase current, three-phase voltage, protection actuating signal, and extract the information such as fault phase, action phase, nature of trouble, fault clearing time, reclosing action situation.
2. the line fault analytical approach based on recorded wave file, is characterized in that, said method comprising the steps of:
(1) obtain the configuration of essential parameter of circuit and passage, comprise circuit positive sequence resistance, forward-sequence reactance, zero sequence resistance, zero-sequence reactance, line length, circuit three-phase current channel number, circuit three-phase voltage channel number, route protection action channel number, circuit re-switching channel number;
(2) arrange recorder data, three-phase current, three-phase voltage are carried out to one or two sub-value conversions;
(3) calculate a phase of three-phase current amplitude maximum, judge whether this phase circuit has fault, and non-fault line is not analyzed;
(4) with route protection move digital quantity, protect actuating signal) filter, at least onely protect mutually actuating signal generation displacement, the fault that is judged as this phase circuit is troubles inside the sample space, otherwise is judged as external area error, external area error circuit is not analyzed;
(5) use three-phase current, the moment of failure judgement starting point;
(6) failure judgement is separate;
(7) according to fault is separate, carry out fault localization calculating;
(8) according to the moment of fault starting point and fault phase electric current, the moment of failure judgement excision point;
(9), according to trouble spot and three-phase current, there is the separate of tripping operation in judgement;
(10) according to trouble spot and fault phase electric current, reclosing signal, judgement reclosing situation.
3. method according to claim 2, is characterized in that:
Wherein step (3) further comprises:
1. calculate a phase of three-phase current amplitude maximum, lowest high-current value Imax and the position that occurs maximum current;
2. occur after maximum current, the electric current of continuous two cycles of this phase current is less than Imax/10, judges this phase line fault.
4. method according to claim 2, is characterized in that:
Wherein step (5) further comprises:
1. calculate the poor △ Ixy of three-phase current between two
△ (Ixy)=|| I (xy, k) – I (xy, k-T) |-| I (xy, k-T) – I (xy, k-2T) |, xy refers to that AB, BC, tri-kinds of CA are separate, the current time that k refers to sampling a bit, T is one week sampling number, the sampled value before (k-T) refer to that k orders 1 week, sampled value 2 weeks of (k-2T) ordering from k;
2. continuous T/6 three-phase current poor (△ Ixy) surpasses startup definite value Iqd, judges that k is as fault starting point.
5. method according to claim 2, is characterized in that:
Wherein step (6) further comprises:
1. calculate fault and start front 0.5 cycle three-phase current (Ia_bef, Ib_bef, Ic_bef), 1.5 cycle three-phase currents (Ia_aft, Ib_aft, Ic_aft) after fault starts;
2. calculate fault and start rear 1.5 cycle zero-sequence current I0_aft, if mI0_aft>Ia_aft or mI0_aft>Ib_aft or mI0_aft>Ic_aft, be judged as earth fault, wherein m is default tuning coefficient;
3. calculate phase differential current Sudden Changing Rate △ I
aB, △ I
bCwith △ I
cAwith difference of phase currents △ I
a, △ I
bwith △ I
c, wherein:
△I
AB＝|(Ia_aft-Ia_bef)-(Ib_aft-Ib_bef)|＝|△I
A-△I
B|；
△I
BC＝|(Ib_aft-Ib_bef)-(Ic_aft-Ic_bef)|＝|△I
B-△I
C|；
△I
CA＝|(Ic_aft-Ic_bef)-(Ia_aft-Ia_bef)|＝|△I
C-△I
A|；
If be earth fault:
M △ I
bC< △ I
aBand m △ I
bC< △ I
cA, A phase ground short circuit; M △ I
cA< △ I
aBand m △ I
cA< △ I
bC, B phase ground short circuit;
M △ I
aB< △ I
bCand m △ I
aB< △ I
cA, C phase ground short circuit;
Below do not meet, be judged to be double earthfault, ask the maximal value of three phase differential current Sudden Changing Rates, corresponding two-phase is fault phase with it.
If be ungrounded fault:
M △ I
c< △ I
aand m △ I
c< △ I
b, AB line to line fault;
M △ I
a< △ I
band m △ I
a< △ I
c, BC line to line fault;
M △ I
b< △ I
aand m △ I
b< △ I
c, CA line to line fault;
Below do not meet, be judged to be three-phase fault.
6. method according to claim 2, is characterized in that:
Wherein step (7) further comprises: adopt single end distance measurement impedance method, obtain abort situation.
7. method according to claim 2, is characterized in that:
Wherein step (8) further comprises:
In the sampling section of a recorder data, comtrade file is equal interval sampling, with △ y, is fabs (I
x+1– I
x) the fault phase current curve tangent slope of this position of equivalent description, wherein I
xfor fault phase electric current, when from sampling point position N, when the △ y of a continuous N point is less than the △ limit of setting, can think that N position is exactly failure removal point.
8. method according to claim 2, is characterized in that:
Wherein step (9) further comprises:
According to method claim (8) Suo Shu, judge successively whether three-phase current exists failure removal point, exist failure removal point to judge that this trips mutually.
9. method according to claim 2, is characterized in that:
Wherein step (10) further comprises:
1. whether computational scheme reclosing signal there is displacement, if there is displacement, and displacement occurs in behind trouble spot, and judgement overlaps, and gets the displacement of reclosing signal the time of coincidence constantly;
If 2. there is coincidence, according to the described method of step (3), detect the rear three-phase current that overlaps and whether have fault, coincidence after-current still has fault to be judged as reclosing failure, and coincidence after-current non-fault is judged as successful reclosing.
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|---|---|---|---|
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|---|---|---|---|
| CN201410353366.7A CN104122485A (en) | 2014-07-23 | 2014-07-23 | Recording file based line fault analysis |
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ID=51767975
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|---|---|---|---|---|
| CN104459478A (en) * | 2015-01-14 | 2015-03-25 | 国网上海市电力公司 | Double-end fault ranging system based on fault recording data of scheduling power grid |
| CN107015123A (en) * | 2017-06-06 | 2017-08-04 | 云南电网有限责任公司 | A kind of accurate decision method of transmission line malfunction based on recorder data |
| CN107037280A (en) * | 2016-11-11 | 2017-08-11 | 中国南方电网有限责任公司 | Protection big data fault signature system construction method based on recording scanning technique |
| CN107272655A (en) * | 2017-07-21 | 2017-10-20 | 江南大学 | Batch process fault monitoring method based on multistage ICA SVDD |
| CN107844383A (en) * | 2017-11-09 | 2018-03-27 | 广东电网有限责任公司东莞供电局 | A kind of failure analysis methods based on station level information Yu recorded wave file Fusion Model |
| CN109001596A (en) * | 2018-10-17 | 2018-12-14 | 广东电网有限责任公司 | A kind of electric network failure diagnosis and transmission line parameter identification system |
| CN109001589A (en) * | 2018-05-03 | 2018-12-14 | 西安理工大学 | Line parameter circuit value time-domain calculation method based on open-phase operation fault recorder data |
| CN109031175A (en) * | 2018-06-14 | 2018-12-18 | 国网江苏省电力有限公司 | A kind of zero-sequence current method of calibration |
| CN109239531A (en) * | 2018-10-17 | 2019-01-18 | 国电南瑞科技股份有限公司 | Failure wave-recording on-line analysis based on relay protection in-service monitoring and analysis system |
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| CN107037280A (en) * | 2016-11-11 | 2017-08-11 | 中国南方电网有限责任公司 | Protection big data fault signature system construction method based on recording scanning technique |
| CN107037280B (en) * | 2016-11-11 | 2019-07-23 | 中国南方电网有限责任公司 | Protection big data fault signature system construction method based on recording scanning technique |
| CN107015123B (en) * | 2017-06-06 | 2019-09-27 | 云南电网有限责任公司 | A kind of accurate determination method of transmission line malfunction based on recorder data |
| CN107015123A (en) * | 2017-06-06 | 2017-08-04 | 云南电网有限责任公司 | A kind of accurate decision method of transmission line malfunction based on recorder data |
| CN107272655A (en) * | 2017-07-21 | 2017-10-20 | 江南大学 | Batch process fault monitoring method based on multistage ICA SVDD |
| CN107272655B (en) * | 2017-07-21 | 2019-08-06 | 江南大学 | Batch process fault monitoring method based on multistage ICA-SVDD |
| CN107844383A (en) * | 2017-11-09 | 2018-03-27 | 广东电网有限责任公司东莞供电局 | A kind of failure analysis methods based on station level information Yu recorded wave file Fusion Model |
| CN107844383B (en) * | 2017-11-09 | 2020-12-29 | 广东电网有限责任公司东莞供电局 | Fault analysis method based on station control layer information and wave recording file fusion model |
| CN109001589A (en) * | 2018-05-03 | 2018-12-14 | 西安理工大学 | Line parameter circuit value time-domain calculation method based on open-phase operation fault recorder data |
| CN109001589B (en) * | 2018-05-03 | 2021-01-15 | 西安理工大学 | Line parameter time domain calculation method based on non-full-phase operation fault recording data |
| CN109031175A (en) * | 2018-06-14 | 2018-12-18 | 国网江苏省电力有限公司 | A kind of zero-sequence current method of calibration |
| CN109001596A (en) * | 2018-10-17 | 2018-12-14 | 广东电网有限责任公司 | A kind of electric network failure diagnosis and transmission line parameter identification system |
| CN109239531A (en) * | 2018-10-17 | 2019-01-18 | 国电南瑞科技股份有限公司 | Failure wave-recording on-line analysis based on relay protection in-service monitoring and analysis system |
| CN109001596B (en) * | 2018-10-17 | 2021-06-29 | 广东电网有限责任公司 | Power grid fault diagnosis and power transmission line parameter identification system |
| CN110265979A (en) * | 2019-05-06 | 2019-09-20 | 萨德克·阿齐兹 | The method and device of non-communicating high speed distance relaying is realized in no signal transmission line |
| CN110265979B (en) * | 2019-05-06 | 2021-12-17 | 萨德克·阿齐兹 | Method and device for realizing non-communication high-speed distance relay in signal-free transmission line |
| CN110687400A (en) * | 2019-10-16 | 2020-01-14 | 东方电子股份有限公司 | Method for filtering false start of transient recording type fault indicator |
| CN110687400B (en) * | 2019-10-16 | 2021-07-20 | 东方电子股份有限公司 | Method for filtering false start of transient recording type fault indicator |
| CN111751665A (en) * | 2020-06-29 | 2020-10-09 | 深圳供电局有限公司 | Method and system for judging phase-to-phase fault based on power grid fault recording graph |
| CN111751668A (en) * | 2020-06-29 | 2020-10-09 | 深圳供电局有限公司 | Method and system for judging internal and external faults of bus area based on power grid fault recording graph |
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