CN104537137B - High-tension electricity transformer short circuit fault prediction technique, prediction meanss and defence method - Google Patents
High-tension electricity transformer short circuit fault prediction technique, prediction meanss and defence method Download PDFInfo
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- CN104537137B CN104537137B CN201410624627.4A CN201410624627A CN104537137B CN 104537137 B CN104537137 B CN 104537137B CN 201410624627 A CN201410624627 A CN 201410624627A CN 104537137 B CN104537137 B CN 104537137B
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Abstract
The present invention provides a kind of high-tension electricity transformer short circuit fault prediction technique, prediction meanss and defence method, wherein prediction technique utilizes electromagnetic transient simulation software to obtain transmission line of lightning strike structural model the following steps are included: obtain the tripping short circuit current of high-tension electricity transformer to be predicted；Wherein, the transmission line of lightning strike structural model includes high-tension electricity transformer model and Tower Model；Lightning test emulation is carried out to the Tower Model using the electromagnetic transient simulation software, obtains the lightning stroke short circuit current that Tower Model described in simulation process generates；The lightning stroke short circuit current is compared with the tripping short circuit current, the tripping probability that lightning stroke trip occurs in high-tension electricity transformer actual motion is obtained according to the comparison result；The probability that short trouble occurs when being struck by lightning for high-tension electricity transformer is obtained according to the tripping probability.Above-mentioned prediction technique can predict high-tension electricity transformer short circuit fault compared with high precision.
Description
Technical field
The present invention relates to electric power project engineering, more particularly to a kind of high-tension electricity transformer short circuit fault prediction technique,
High-tension electricity transformer short circuit fault prediction meanss and high-tension electricity transformer short circuit fault defence method.
Background technique
In recent years, power grid occurs often due to high-tension electricity transformer, such as compact transformer, the protection of ontology grave gas
Transformer tripping fault caused by malfunction, this serious reliability service for affecting electric system and customer power supply.High-voltage electricity
The reason of power transformer body grave gas protection misoperation, mainly power grid transient state, impact (sudden short circuit).And in high voltage power transmission
In route operation, lightning stroke causes the impact of power grid transient state to the 40%~70% of the total trip accident of trip accident Zhan formed, especially
, in more thunders as south, soil resistivity height, area with a varied topography, the caused trip-out rate that is struck by lightning is higher for it.
Therefore, predict that the probability of short circuit current size, distribution caused by transmission line of lightning strike flashover etc. becomes prevention high pressure
Power transformer tripping fault keeps a kind of preferable mode of the safe and stable operation of system.
However existing prediction mode is lower for the probability accuracy of short circuit current size caused by prediction lightning stroke, causes
The accuracy of forecast that short trouble occurs to high-tension electricity transformer is lower.
Summary of the invention
Based on this, it is necessary to for existing prediction mode to the accuracy of forecast of high-tension electricity transformer short circuit fault compared with
Low problem provides a kind of high-tension electricity transformer short circuit fault prediction technique, high-tension electricity transformer short circuit fault prediction dress
It sets and high-tension electricity transformer short circuit fault defence method.
A kind of high-tension electricity transformer short circuit fault prediction technique, comprising the following steps:
The tripping short circuit current for obtaining high-tension electricity transformer to be predicted, using electromagnetic transient simulation software to the height
Piezoelectric forces transformer is modeled, and transmission line of lightning strike structural model is obtained；Wherein, the transmission line of lightning strike structural model packet
Include high-tension electricity transformer model and Tower Model；
Lightning test emulation is carried out to the Tower Model using the electromagnetic transient simulation software, is obtained in simulation process
The electric current that the Tower Model generates obtains lightning stroke short circuit current；
The lightning stroke short circuit current is compared with the tripping short circuit current, the lightning stroke short circuit current is obtained and is greater than
The comparison result of the tripping short circuit current, obtains in high-tension electricity transformer actual motion according to the comparison result and thunder occurs
Hit the tripping probability of tripping；
The probability that short trouble occurs when being struck by lightning for high-tension electricity transformer is obtained according to the tripping probability.
A kind of high-tension electricity transformer short circuit fault prediction meanss, comprising:
Module is constructed, it is imitative using electro-magnetic transient for obtaining the tripping short circuit current of high-tension electricity transformer to be predicted
True software models the high-tension electricity transformer, obtains transmission line of lightning strike structural model；Wherein, the lightning stroke transmission of electricity
Line construction model includes high-tension electricity transformer model and Tower Model；
Current module is obtained, it is imitative for carrying out lightning test to the Tower Model using the electromagnetic transient simulation software
Very, the electric current that Tower Model described in simulation process generates is obtained, lightning stroke short circuit current is obtained；
Tripping probabilistic module obtains institute for the lightning stroke short circuit current to be compared with the tripping short circuit current
The comparison result that lightning stroke short circuit current is greater than the tripping short circuit current is stated, high-tension electricity transformation is obtained according to the comparison result
The tripping probability of lightning stroke trip occurs in device actual motion；
For obtaining high-tension electricity transformer according to the tripping probability short-circuit event occurs when being struck by lightning for prediction module
The probability of barrier.
Above-mentioned high-tension electricity transformer short circuit fault prediction technique and high-tension electricity transformer short circuit fault prediction meanss are led to
It crosses electromagnetic transient simulation software building transmission line of lightning strike structural model and lightning stroke emulation is carried out to the Tower Model, to obtain
Take lightning stroke short circuit current；The lightning stroke short circuit current size accuracy of acquisition is higher so that by the lightning stroke short circuit current with
The tripping short circuit current of the high-tension electricity transformer be compared the probability accuracy of rear acquired generation lightning stroke trip compared with
Height can then predict high-tension electricity transformer short circuit fault compared with high precision.
A kind of high-tension electricity transformer short circuit fault defence method, according to the probability of short trouble described in any of the above embodiments
Be on the defensive measure to transmission line of electricity, if the probability of short trouble is greater than the value of setting, in transformer entrance tandem electric inductance and/or
Reinforce transmission line insulator performance；If the probability of short trouble is no more than the value set in transformer entrance tandem electric inductance or reinforcement
Transmission line insulator performance.
Above-mentioned high-tension electricity transformer short circuit fault defence method, by high-tension electricity transformer short circuit fault carry out compared with
The prediction of high precision reduces high-tension electricity transformer so as to carry out preferable defensive measure to high-tension electricity transformer
The probability that short trouble occurs.
Detailed description of the invention
Fig. 1 is an embodiment high-tension electricity transformer short circuit fault prediction technique flow chart；
Fig. 2 is an embodiment transmission line of lightning strike structural model figure；
High-tension electricity transformer entrance short circuit current histogram when Fig. 3 is one loop line road single-phase short circuit of an embodiment；
High-tension electricity transformer entrance short circuit current histogram when Fig. 4 is two loop line road single-phase short circuit of an embodiment；
Fig. 5 is an embodiment high-tension electricity transformer short circuit fault prediction meanss structural schematic diagram.
Specific embodiment
It is short to high-tension electricity transformer short circuit fault prediction technique of the invention, high-tension electricity transformer with reference to the accompanying drawing
The specific embodiment of road fault prediction device and high-tension electricity transformer short circuit fault defence method is described in detail.
Referring to Fig. 1, Fig. 1 is an embodiment high-tension electricity transformer short circuit fault prediction technique flow chart.
A kind of high-tension electricity transformer short circuit fault prediction technique, comprising the following steps:
Step S102: obtaining the tripping short circuit current of high-tension electricity transformer to be predicted, soft using electromagnetic transient simulation
Part models the high-tension electricity transformer, obtains transmission line of lightning strike structural model；Wherein, the transmission line of lightning strike
Structural model includes high-tension electricity transformer model and Tower Model；
In step s 102, tripping short circuit current is short-circuit using the tripping of practical high-tension electricity transformer to be predicted
Electric current, while tripping short circuit current being input in electromagnetic transient simulation software, it can make to predict so more accurate.
Step S104: lightning test emulation is carried out to the Tower Model using the electromagnetic transient simulation software, is obtained
The electric current that Tower Model described in simulation process generates obtains lightning stroke short circuit current；
In step S104, lightning test emulation can carry out different degrees of lightning test to the Tower Model, thus
The electric current that the Tower Model generates can be more fully obtained, it is practical then can more accurately to obtain high-tension electricity transformer
The tripping probability of lightning stroke trip occurs in operation.
In one embodiment, described that lightning stroke emulation is carried out to the Tower Model using the electromagnetic transient simulation software
Step may include:
Using the electromagnetic transient simulation software is obtained for carrying out the thunder and lightning charge values of lightning test emulation, Tower Model connects
Ground resistance, and lightning test emulation is carried out to the shaft tower according to the thunder and lightning charge values, Tower Model ground resistance.
It can be more accurately to described by the thunder and lightning charge values for carrying out lightning test emulation, Tower Model ground resistance
The case where when Tower Model is struck by lightning, is emulated.
In one embodiment, described the step of obtaining the electric current that Tower Model described in simulation process generates, may include:
The high-tension electricity that Tower Model described in simulation process generates is obtained using the electromagnetic transient simulation software
The electric current of the electric current of one loop line road single-phase short circuit of transformer model outgoing line side and two loop line roads while single-phase short circuit.
The electric current of the one loop line road single-phase short circuit of high-tension electricity transformer model outgoing line side is lighter in lightning stroke situation
The electric current of the single-phase short circuit generated when situation, the two loop line road of high-tension electricity transformer model outgoing line side while single-phase short circuit
Electric current is the electric current of the single-phase short circuit generated in the more serious situation of situation of being struck by lightning；Obtain the high-tension electricity transformer model
The electric current of the electric current of one loop line road single-phase short circuit of outgoing line side and two loop line roads while single-phase short circuit can be according to different situations pair
High-tension electricity transformer to be measured carries out more accurate prediction.
Step S106: the lightning stroke short circuit current is compared with the tripping short circuit current, and it is short to obtain the lightning stroke
Road electric current is greater than the comparison result of the tripping short circuit current, obtains the practical fortune of high-tension electricity transformer according to the comparison result
The tripping probability of lightning stroke trip occurs in row；
In step s 106, when the lightning stroke short circuit current is greater than the tripping short circuit current, high-tension electricity transformer
Lightning stroke trip can occur, it is available after being compared all lightning stroke short circuit currents with the tripping short circuit current
The tripping probability of lightning stroke trip occurs in high-tension electricity transformer actual motion.
In one embodiment, described to obtain the probability that trips of generation lightning stroke trip in high-tension electricity transformer actual motion
Step may include following formula:
Wherein, P indicates that amplitude of lightning current probability, I indicate amplitude of lightning current.
Pass throughThe corresponding amplitude of lightning current probability of amplitude of lightning current can be calculated, so as to attend the meeting
The corresponding amplitude of lightning current probability of the amplitude of lightning current of lightning stroke trip is caused, then the practical fortune of available high-tension electricity transformer
The tripping probability of lightning stroke trip occurs in row.
Step S108: high-tension electricity transformer is obtained according to the tripping probability, short trouble occurs when being struck by lightning
Probability.
Above-mentioned high-tension electricity transformer short circuit fault prediction technique passes through electromagnetic transient simulation software building lightning stroke power transmission line
Line structure model simultaneously carries out lightning stroke emulation to the Tower Model, to obtain lightning stroke short circuit current；The lightning stroke short circuit electricity of acquisition
Stream size accuracy is higher, so that by the tripping short circuit current of the lightning stroke short circuit current and the high-tension electricity transformer
The probability accuracy for being compared rear acquired generation lightning stroke trip is higher, then can be compared with high precision to high-tension electricity
Transformer short circuit fault is predicted.
In order to further explain in detail high-tension electricity transformer short circuit fault prediction technique of the present invention, below in conjunction with
Specific application example is illustrated.
Referring to Fig. 2, Fig. 2 is an embodiment transmission line of lightning strike structural model figure.
High-tension electricity transformer is the transformer in Fig. 2, and first and second, deep blue Gao Jiayi, deep blue goose first and second respectively indicate not after deep blue
Same transmission line of electricity, 9M indicate the 9th shaft tower position.First by high-tension electricity transformer to be predicted, tripping short circuit current
It is input in electromagnetic transient simulation software, then the high-tension electricity transformer is built by electromagnetic transient simulation software
Mould, obtain transmission line of lightning strike structural model, the transmission line of lightning strike structural model include high-tension electricity transformer, bus,
Conducting wire, shaft tower and ground resistance model.The model of bus model can beThe height of bus model can
Think 9.50m.Equipment room line model can be NRLH59GJ-1440/120.
Next different degrees of lightning stroke is carried out to all Tower Models using the electromagnetic transient simulation software to test
Emulation, to obtain the electric current of the generation of Tower Model described in simulation process.
Please refer to table 1.According to the electric current that the Tower Model generates, Tower Model is produced when obtaining a loop line road single-phase short circuit
The short circuit current of short circuit current and high-tension electricity transformer inlet on raw short circuit current, especially outlet line, simultaneously
Shaft tower position is the power frequency grounding resistance value and Tower Impulse Grounding Resistance value of the shaft tower of 1-20 when obtaining generating short circuit current.
Table 1
Referring to Fig. 3, high-tension electricity transformer entrance short circuit current column when Fig. 3 is one loop line road single-phase short circuit of an embodiment
Shape figure.
The tower grounding for being 1-20 according to the short circuit current of high-tension electricity transformer obtained inlet and shaft tower position
High-tension electricity transformer entrance short circuit current histogram when resistance generates a loop line road single-phase short circuit, from Fig. 4, we can see that
The lesser high-tension electricity transformer entrance short circuit current of pole tower ground resistance is generally large.
Please refer to table 2.According to the electric current that the Tower Model generates, Tower Model is produced when obtaining two loop line road single-phase short circuits
The short circuit electricity of raw short circuit current, especially outlet line first and short circuit current and high-tension electricity transformer inlet in second
Stream, while obtaining shaft tower position when generation short circuit current is the power frequency grounding resistance value and shaft tower impulse grounding electricity of the shaft tower of 1-20
Resistance value.
Table 2
Referring to Fig. 4, high-tension electricity transformer entrance short circuit current column when Fig. 4 is two loop line road single-phase short circuit of an embodiment
Shape figure.
The tower grounding for being 1-20 according to the short circuit current of high-tension electricity transformer obtained inlet and shaft tower position
Resistance generate two loop line road single-phase short circuits when high-tension electricity transformer entrance short circuit current histogram, from Fig. 4 we can see that
The lesser high-tension electricity transformer entrance short circuit current of pole tower ground resistance is generally large.
Then the short circuit current of a loop line road single-phase short circuit of acquisition and two loop line road single-phase short circuits and the tripping is short
Road electric current is compared, and obtains the comparison result that short circuit current is greater than the tripping short circuit current.Next according to the comparison
As a result formula is utilizedWherein, P indicates that amplitude of lightning current probability, I indicate amplitude of lightning current, obtain will cause high pressure
The corresponding amplitude of lightning current probability of the amplitude of lightning current of power transformer lightning stroke trip.Then it is practical to obtain high-tension electricity transformer
The tripping probability of lightning stroke trip occurs in operation；High-tension electricity transformer hair when being struck by lightning is obtained according to the tripping probability
The probability of raw short trouble.
The probability that short trouble occurs when being struck by lightning for the high-tension electricity transformer that will acquire is summarised in table 3.In table 3
" √ " indicates that short circuit current has the possibility for causing high-tension electricity transformer lightning stroke trip.Lightning current outlet probability indicates every 100 times
In lightening activity, amplitude of lightning current is more than the probability of the value.Such as amplitude of lightning current be 239kA lightning current occur probability be
0.19%, it indicates in every 100 lightning strokes, amplitude is more than that the lightning current number of 239kA is 0.19 time.Please refer to table 3.
Table 3
After obtaining high-tension electricity transformer when being struck by lightning the probability of short trouble occur, for short circuit occurs therefore
The biggish high-tension electricity transformer of the probability of barrier, reinforces its transmission line insulator performance.By improving the resistance to Lei Shuiping of transmission line of electricity,
Reduce the number that flashover occurs for transmission circuit insulator string, causes high-tension electricity to become because short circuit current is excessive so as to reduce
The number of depressor transmission short trouble.
In addition it can also connect before high-tension electricity transformer entrance, the series inductance member before high-tension electricity transformer outlet
When part, equivalent to increase the electrical length of route, or equivalent to increase the leakage reactance value of high-tension electricity transformer outgoing line side,
Increase zero-sequence current impedance loop, it can be with the amplitude of limiting short-circuit current, to reduce the transmission of high-tension electricity transformer with this
The number of short trouble.
It is also possible to connect reactance component at high-tension electricity transformer neutral point.High-tension electricity transformer neutral point
It connects after low reactance, is equivalent to the zero sequence leakage reactance value for changing high-tension electricity transformer winding, increase in zero-sequence current circuit
Impedance reduce the number that high-tension electricity transformer sends short trouble so as to limiting short-circuit current amplitude.
Referring to Fig. 5, Fig. 5 is an embodiment high-tension electricity transformer short circuit fault prediction meanss structural schematic diagram.
A kind of high-tension electricity transformer short circuit fault prediction meanss, comprising:
It constructs module 220 and utilizes electro-magnetic transient for obtaining the tripping short circuit current of high-tension electricity transformer to be predicted
Simulation software models the high-tension electricity transformer, obtains transmission line of lightning strike structural model；Wherein, the lightning stroke is defeated
Electric line structural model includes high-tension electricity transformer model and Tower Model；
Current module 240 is obtained, for carrying out lightning stroke examination to the Tower Model using the electromagnetic transient simulation software
Emulation is tested, the electric current that Tower Model described in simulation process generates is obtained, obtains lightning stroke short circuit current；
Tripping probabilistic module 260 is obtained for the lightning stroke short circuit current to be compared with the tripping short circuit current
The lightning stroke short circuit current is greater than the comparison result of the tripping short circuit current, obtains high-tension electricity according to the comparison result and becomes
The tripping probability of lightning stroke trip occurs in depressor actual motion；
Prediction module 280, it is short for being occurred according to tripping probability acquisition high-tension electricity transformer when being struck by lightning
The probability of road failure.
Above-mentioned high-tension electricity transformer short circuit fault prediction meanss, tripping short circuit current is using practical height to be predicted
The tripping short circuit current of piezoelectric forces transformer, while tripping short circuit current being input in electromagnetic transient simulation software, in this way may be used
So that prediction is more accurate.Lightning test emulation can carry out different degrees of lightning test to the Tower Model, so as to
More fully to obtain the electric current that the Tower Model generates, the practical fortune of high-tension electricity transformer then can be more accurately obtained
The tripping probability of lightning stroke trip occurs in row.When the lightning stroke short circuit current is greater than the tripping short circuit current, high-tension electricity
Lightning stroke trip can occur for transformer, can after being compared all lightning stroke short circuit currents with the tripping short circuit current
To obtain the tripping probability that lightning stroke trip occurs in high-tension electricity transformer actual motion.
In one embodiment, the acquisition current module 240 is executed using the electromagnetic transient simulation software to the bar
Tower model carry out lightning stroke emulation process may include:
Using the electromagnetic transient simulation software is obtained for carrying out the thunder and lightning charge values of lightning test emulation, Tower Model connects
Ground resistance, and lightning test emulation is carried out to the shaft tower according to the thunder and lightning charge values, Tower Model ground resistance.
It can be more accurately to described by the thunder and lightning charge values for carrying out lightning test emulation, Tower Model ground resistance
The case where when Tower Model is struck by lightning, is emulated.
In one embodiment, the current module 240 that obtains executes what Tower Model described in acquisition simulation process generated
The process of electric current may include:
The high-tension electricity that Tower Model described in simulation process generates is obtained using the electromagnetic transient simulation software
The electric current of the electric current of one loop line road single-phase short circuit of transformer model outgoing line side and two loop line roads while single-phase short circuit.
The electric current of the one loop line road single-phase short circuit of high-tension electricity transformer model outgoing line side is lighter in lightning stroke situation
The electric current of the single-phase short circuit generated when situation, the two loop line road of high-tension electricity transformer model outgoing line side while single-phase short circuit
Electric current is the electric current of the single-phase short circuit generated in the more serious situation of situation of being struck by lightning；Obtain the high-tension electricity transformer model
The electric current of the electric current of one loop line road single-phase short circuit of outgoing line side and two loop line roads while single-phase short circuit can be according to different situations pair
High-tension electricity transformer to be measured carries out more accurate prediction.
In one embodiment, the tripping probabilistic module 260 executes to obtain and occur in high-tension electricity transformer actual motion
The process of the tripping probability of lightning stroke trip includes following formula:
Wherein, P indicates that amplitude of lightning current probability, I indicate amplitude of lightning current.
Pass throughThe corresponding amplitude of lightning current probability of amplitude of lightning current can be calculated, so as to attend the meeting
The corresponding amplitude of lightning current probability of the amplitude of lightning current of lightning stroke trip is caused, then the practical fortune of available high-tension electricity transformer
The tripping probability of lightning stroke trip occurs in row.
Above-mentioned high-tension electricity transformer short circuit fault prediction meanss pass through electromagnetic transient simulation software building lightning stroke power transmission line
Line structure model simultaneously carries out lightning stroke emulation to the Tower Model, to obtain lightning stroke short circuit current；The lightning stroke short circuit electricity of acquisition
Stream size accuracy is higher, so that by the tripping short circuit current of the lightning stroke short circuit current and the high-tension electricity transformer
The probability accuracy for being compared rear acquired generation lightning stroke trip is higher, then can be compared with high precision to high-tension electricity
Transformer short circuit fault is predicted.
A kind of high-tension electricity transformer short circuit fault defence method, according to the probability of short trouble described in any of the above embodiments
It is on the defensive measure to transmission line of electricity；
If the probability of short trouble is greater than the threshold value of setting, in transformer entrance tandem electric inductance and/or reinforce transmission line of electricity
Insulation performance；If the probability of short trouble in transformer entrance tandem electric inductance or reinforces transmission line insulator no more than the value of setting
Performance.
In one embodiment, the threshold value of the setting can be 1 percent.
The threshold value set can preferably be on the defensive measure to different short troubles as 1 percent.
Above-mentioned high-tension electricity transformer short circuit fault defence method, by high-tension electricity transformer short circuit fault carry out compared with
The prediction of high precision reduces high-tension electricity transformer so as to carry out preferable defensive measure to high-tension electricity transformer
The probability that short trouble occurs.
High-tension electricity transformer short circuit fault prediction meanss of the invention and high-tension electricity transformer short-circuit event of the invention
Hinder prediction technique to correspond, in the technical characteristic that above-mentioned high-tension electricity transformer short circuit fault prediction technique embodiment illustrates
And its advantages are suitable for the embodiment of high-tension electricity transformer short circuit fault prediction meanss, hereby give notice that.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of high-tension electricity transformer short circuit fault prediction technique, which comprises the following steps:
Tripping short circuit current is input to electromagnetic transient simulation by the tripping short circuit current for obtaining high-tension electricity transformer to be predicted
In software；
The high-tension electricity transformer is modeled using electromagnetic transient simulation software, obtains transmission line of lightning strike structure mould
Type；Wherein, the transmission line of lightning strike structural model includes high-tension electricity transformer model and Tower Model；
Different degrees of lightning test is carried out to the Tower Model using the electromagnetic transient simulation software to emulate, and obtains emulation
The short circuit current that the Tower Model generates in the process, obtains the lightning stroke short circuit current of high-tension electricity transformer inlet；Wherein,
The different degrees of lightning test emulation indicates that the thunder-strike current for inputting different amplitudes is emulated；The lightning stroke short circuit current
The short circuit current generated greater than the Tower Model；
The lightning stroke short circuit current is compared with the tripping short circuit current, obtains the lightning stroke short circuit current greater than described
The comparison result of tripping short circuit current obtains according to the comparison result and lightning stroke jump occurs in high-tension electricity transformer actual motion
The tripping probability of lock；
The probability that short trouble occurs when being struck by lightning for high-tension electricity transformer is obtained according to the tripping probability.
2. high-tension electricity transformer short circuit fault prediction technique according to claim 1, which is characterized in that described to utilize institute
Stating the step of electromagnetic transient simulation software carries out different degrees of lightning stroke emulation to the Tower Model includes:
Using electromagnetic transient simulation software acquisition for carrying out thunder and lightning charge values, the Tower Model ground connection electricity of lightning test emulation
Resistance, and different degrees of lightning test is carried out to the shaft tower according to the thunder and lightning charge values, Tower Model ground resistance and is emulated.
3. high-tension electricity transformer short circuit fault prediction technique according to claim 1, which is characterized in that described obtain is imitated
The step of short circuit current of the Tower Model generation, includes: during true
The high-tension electricity transformation that Tower Model described in simulation process generates is obtained using the electromagnetic transient simulation software
The electric current of the electric current of one loop line road single-phase short circuit of device model outgoing line side and two loop line roads while single-phase short circuit.
4. high-tension electricity transformer short circuit fault prediction technique according to claim 1, which is characterized in that the acquisition is high
The step of tripping probability of lightning stroke trip occurs in piezoelectric forces transformer actual motion includes following formula:
Wherein, P indicates that amplitude of lightning current probability, I indicate amplitude of lightning current.
5. a kind of high-tension electricity transformer short circuit fault prediction meanss characterized by comprising
Module is constructed, for obtaining the tripping short circuit current of high-tension electricity transformer to be predicted, by tripping short circuit current input
Into electromagnetic transient simulation software；The high-tension electricity transformer is modeled using electromagnetic transient simulation software, obtains thunder
Hit transmission line structure model；Wherein, the transmission line of lightning strike structural model includes high-tension electricity transformer model and shaft tower
Model；
Current module is obtained, for carrying out different degrees of lightning stroke to the Tower Model using the electromagnetic transient simulation software
Test simulation obtains the short circuit current that Tower Model described in simulation process generates, obtains high-tension electricity transformer inlet
Be struck by lightning short circuit current；Wherein, the different degrees of lightning test emulation indicates that the thunder-strike current for inputting different amplitudes is imitated
Very；The lightning stroke short circuit current is greater than the short circuit current that the Tower Model generates；
Tripping probabilistic module obtains the thunder for the lightning stroke short circuit current to be compared with the tripping short circuit current
The comparison result that short circuit current is greater than the tripping short circuit current is hit, it is real to obtain high-tension electricity transformer according to the comparison result
The tripping probability of lightning stroke trip occurs in the operation of border；
For obtaining high-tension electricity transformer according to the tripping probability short trouble occurs when being struck by lightning for prediction module
Probability.
6. high-tension electricity transformer short circuit fault prediction meanss according to claim 5, which is characterized in that the acquisition electricity
Flow module executes the process for carrying out different degrees of lightning stroke emulation to the Tower Model using the electromagnetic transient simulation software
Include:
Using electromagnetic transient simulation software acquisition for carrying out thunder and lightning charge values, the Tower Model ground connection electricity of lightning test emulation
Resistance, and different degrees of lightning test is carried out to the shaft tower according to the thunder and lightning charge values, Tower Model ground resistance and is emulated.
7. high-tension electricity transformer short circuit fault prediction meanss according to claim 5, which is characterized in that the acquisition electricity
Flow module, which executes, to be obtained the process of short circuit current that Tower Model described in simulation process generates and includes:
The high-tension electricity transformation that Tower Model described in simulation process generates is obtained using the electromagnetic transient simulation software
The electric current of the electric current of one loop line road single-phase short circuit of device model outgoing line side and two loop line roads while single-phase short circuit.
8. high-tension electricity transformer short circuit fault prediction meanss according to claim 5, which is characterized in that the tripping is general
It includes following public affairs that rate module, which executes and obtains the process of the tripping probability of generation lightning stroke trip in high-tension electricity transformer actual motion,
Formula:
Wherein, P indicates that amplitude of lightning current probability, I indicate amplitude of lightning current.
9. a kind of high-tension electricity transformer short circuit fault defence method, which is characterized in that according to claim 1 to any one of 8 institutes
The probability for the short trouble stated is on the defensive measure to transmission line of electricity；
If the probability of short trouble is greater than the threshold value of setting, in transformer entrance tandem electric inductance and/or reinforce transmission line insulator
Performance；If the probability of short trouble in transformer entrance tandem electric inductance or reinforces transmission line insulator no more than the threshold value of setting
Energy.
10. high-tension electricity transformer short circuit fault defence method according to claim 9, which is characterized in that the setting
Threshold value be 1 percent.
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| CN109241664B (en) * | 2018-09-29 | 2021-05-25 | 贵州电网有限责任公司 | Analysis and calculation method for lightning electromagnetic transient characteristics of wind driven generator |
| CN113378375B (en) * | 2021-06-08 | 2023-04-28 | 云南电网有限责任公司电力科学研究院 | Fault prediction method, device, equipment and medium for transformer insulation structure |
| CN116504004B (en) * | 2023-06-21 | 2023-11-28 | 国网山东省电力公司青州市供电公司 | Lightning arrester grounding lead monitoring and early warning method, system, device and medium |
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| CN103837769A (en) * | 2014-02-27 | 2014-06-04 | 广西电网公司电力科学研究院 | Lightening damage early-warning method and system for electric transmission line |
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