CN104537137A - A prediction method, a prediction device, and a defense method for a short circuit fault of a high-voltage power transformer - Google Patents
A prediction method, a prediction device, and a defense method for a short circuit fault of a high-voltage power transformer Download PDFInfo
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Abstract
The invention provides a prediction method, a prediction device, and a defense method for a short circuit fault of a high-voltage power transformer. The prediction method for the short-circuit fault of the high-voltage power transformer comprises the steps of acquiring trip short-circuit current of the high-voltage power transformer to be predicted, and obtaining a lightning stroke power transmission line structure model by using electromagnetic transitory simulation software, wherein, the lightning stroke power transmission line structure model comprises a high-voltage power transformer model and a pole tower model; executing lightning stroke test simulation on the pole tower model by using the electromagnetic transitory simulation software, and acquiring lightning stroke short-circuit current generated by the pole tower model during the simulation; comparing the lightning stroke short-circuit current with the trip short-circuit current, and acquiring, according to the compared result, a trip frequency at which lightning stroke trip occurs to the high-voltage power transformer in actual operation thereof; and acquiring, according to the trip frequency, a probability at which the short-circuit fault occurs to the high-voltage power transformer in the case that the high-voltage power transformer is struck by lightning. The above prediction method for the short-circuit fault of the high-voltage power transformer can predict the short-circuit fault of the high-voltage power transformer with higher accuracy.
Description
Technical field
The present invention relates to electric power project engineering, particularly relate to a kind of high-tension electricity transformer short circuit fault Forecasting Methodology, high-tension electricity transformer short circuit fault prediction unit and high-tension electricity transformer short circuit fault defence method.
Background technology
In recent years, electrical network occurs such as, due to high-tension electricity transformer, compact transformer often, body grave gas false protection and the transformer tripping fault caused, the reliability service of what this was serious have impact on electric system and customer power supply.The reason of high-tension electricity transformer body grave gas protection misoperation, mainly electrical network transient state impacts (sudden short circuit).And in ultra-high-tension power transmission line runs, thunderbolt causes electrical network transient state to impact thus the trip accident formed accounts for 40% ~ 70% of total trip accident, especially in the area that many thunders, the soil resistivity as south is high, with a varied topography, the trip-out rate caused by thunderbolt is higher.
Therefore, the probability of short-circuit current size, distribution etc. that prediction transmission line of lightning strike flashover causes becomes prevention high-tension electricity transformer tripping fault, the good mode of one of keeping system safety, stable operation.
But existing prediction mode is lower for the be struck by lightning probability degree of accuracy of short-circuit current size that causes of prediction, cause the be short-circuited accuracy of forecast of fault of high-tension electricity transformer lower.
Summary of the invention
Based on this, be necessary, for the lower problem of the accuracy of forecast of existing prediction mode to high-tension electricity transformer short circuit fault, to provide a kind of high-tension electricity transformer short circuit fault Forecasting Methodology, high-tension electricity transformer short circuit fault prediction unit and high-tension electricity transformer short circuit fault defence method.
A kind of high-tension electricity transformer short circuit fault Forecasting Methodology, comprises the following steps:
Obtain the tripping operation short-circuit current of high-tension electricity transformer to be predicted, utilize electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtain transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
Utilize described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtain the electric current that described in simulation process, Tower Model produces, obtain the short-circuit current that is struck by lightning;
Described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
The probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
A kind of high-tension electricity transformer short circuit fault prediction unit, comprising:
Building module, for obtaining the tripping operation short-circuit current of high-tension electricity transformer to be predicted, utilizing electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtain transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
Obtain current module, for utilizing described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtaining the electric current that described in simulation process, Tower Model produces, obtaining the short-circuit current that is struck by lightning;
Tripping operation probabilistic module, for described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
Prediction module, for the probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
Above-mentioned high-tension electricity transformer short circuit fault Forecasting Methodology and high-tension electricity transformer short circuit fault prediction unit, by electromagnetic transient simulation software building transmission line of lightning strike structural model and to described Tower Model carry out thunderbolt emulation, thus obtain thunderbolt short-circuit current; The thunderbolt short-circuit current size degree of accuracy obtained is higher, thus make the probability degree of accuracy tripping operation short-circuit current of described thunderbolt short-circuit current and described high-tension electricity transformer being compared rear obtained generation lightning stroke trip higher, then can high-tension electricity transformer short circuit fault be predicted compared with high precision.
A kind of high-tension electricity transformer short circuit fault defence method, the probability of the short trouble according to above-mentioned any one to 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 reinforcement transmission line insulator performance; If the probability of short trouble is not more than the value of setting in transformer entrance tandem electric inductance or reinforcement transmission line insulator performance.
Above-mentioned high-tension electricity transformer short circuit fault defence method, by carrying out the prediction compared with high precision to high-tension electricity transformer short circuit fault, thus good defensive measure can be carried out to high-tension electricity transformer, reduce the probability that high-tension electricity transformer short circuit fault occurs.
Accompanying drawing explanation
Fig. 1 is an embodiment high-tension electricity transformer short circuit fault Forecasting Methodology process flow diagram;
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 an embodiment one loop line road single-phase short circuit;
High-tension electricity transformer entrance short-circuit current histogram when Fig. 4 is an embodiment two loop line road single-phase short circuit;
Fig. 5 is an embodiment high-tension electricity transformer short circuit fault prediction unit structural representation.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing to high-tension electricity transformer short circuit fault Forecasting Methodology of the present invention, high-tension electricity transformer short circuit fault prediction unit and high-tension electricity transformer short circuit fault defence method.
Refer to Fig. 1, Fig. 1 is an embodiment high-tension electricity transformer short circuit fault Forecasting Methodology process flow diagram.
A kind of high-tension electricity transformer short circuit fault Forecasting Methodology, comprises the following steps:
Step S102: the tripping operation short-circuit current obtaining high-tension electricity transformer to be predicted, utilizes electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtains transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
In step s 102, the tripping operation short-circuit current of what tripping operation short-circuit current adopted is actual high-tension electricity transformer to be predicted, is input in electromagnetic transient simulation software by tripping operation short-circuit current simultaneously, can make to predict more accurate like this.
Step S104: utilize described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtains the electric current that described in simulation process, Tower Model produces, and obtains the short-circuit current that is struck by lightning;
In step S104, lightning test emulation meeting carries out lightning test in various degree to described Tower Model, thus more fully can obtain the electric current of described Tower Model generation, then can obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion more accurately.
In one embodiment, described utilize described electromagnetic transient simulation software to described Tower Model carry out be struck by lightning emulation step can comprise:
Utilize thunder and lightning charge values, the Tower Model stake resistance of the acquisition of described electromagnetic transient simulation software for carrying out lightning test emulation, and according to described thunder and lightning charge values, Tower Model stake resistance, lightning test emulation is carried out to described shaft tower.
Situation when can be struck by lightning to described Tower Model more accurately by the thunder and lightning charge values for carrying out lightning test emulation, Tower Model stake resistance is emulated.
In one embodiment, the step of the electric current of the generation of Tower Model described in described acquisition simulation process can comprise:
Described electromagnetic transient simulation software is utilized to obtain the electric current of the described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit that Tower Model described in simulation process produces, and the electric current of two loop line roads single-phase short circuit simultaneously.
The electric current of described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit is the electric current of the single-phase short circuit produced when the situation that thunderbolt situation is lighter, and the while of described high-tension electricity transformer model outgoing line side two loop line road, the electric current of single-phase short circuit is the electric current of the single-phase short circuit produced when the situation that thunderbolt situation is more serious; The electric current obtaining single-phase short circuit while of electric current and the two loop line roads of described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit can be predicted high-tension electricity transformer to be measured more accurately according to different situations.
Step S106: described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
In step s 106, when described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, can lightning stroke trip be there is in high-tension electricity transformer, after all described thunderbolt short-circuit currents and described tripping operation short-circuit current being compared, the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion can be obtained.
In one embodiment, the step tripping operation probability of lightning stroke trip occurring in described acquisition high-tension electricity transformer actual motion can comprise following formula:
Wherein, P represents amplitude of lightning current probability, and I represents amplitude of lightning current.
Pass through
the amplitude of lightning current probability that amplitude of lightning current is corresponding can be calculated, thus the amplitude of lightning current probability causing the amplitude of lightning current of lightning stroke trip corresponding of can attending the meeting, then can obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion.
Step S108: the probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
Above-mentioned high-tension electricity transformer short circuit fault Forecasting Methodology, by electromagnetic transient simulation software building transmission line of lightning strike structural model and to described Tower Model carry out thunderbolt emulation, thus obtain thunderbolt short-circuit current; The thunderbolt short-circuit current size degree of accuracy obtained is higher, thus make the probability degree of accuracy tripping operation short-circuit current of described thunderbolt short-circuit current and described high-tension electricity transformer being compared rear obtained generation lightning stroke trip higher, then can high-tension electricity transformer short circuit fault be predicted compared with high precision.
In order to further explain high-tension electricity transformer short circuit fault Forecasting Methodology of the present invention in detail, be described below in conjunction with embody rule example.
Refer 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 after deep blue first and second, high by first and second, the deep blue goose first and second of deep blue represents different transmission lines of electricity respectively, and 9M represents the 9th shaft tower position.First by high-tension electricity transformer to be predicted, tripping operation short-circuit current be input in electromagnetic transient simulation software, then by electromagnetic transient simulation software, modeling is carried out to described high-tension electricity transformer, obtain transmission line of lightning strike structural model, described transmission line of lightning strike structural model comprises high-tension electricity transformer, bus, wire, shaft tower and stake resistance model.The model of bus model can be
the height of bus model can be 9.50m.Equipment room line model can be NRLH59GJ-1440/120.
Next utilize described electromagnetic transient simulation software to carry out thunderbolt experiment simulation in various degree to all Tower Models, thus obtain the electric current that described in simulation process, Tower Model produces.
Refer to table 1.According to the electric current that described Tower Model produces, the short-circuit current that when obtaining a loop line road single-phase short circuit, Tower Model produces, the short-circuit current of the short-circuit current especially on outlet line and high-tension electricity transformer porch, when obtaining producing short-circuit current, shaft tower position is power frequency grounding resistance value and the Tower Impulse Grounding Resistance value of the shaft tower of 1-20 simultaneously.
Table 1
Refer to Fig. 3, high-tension electricity transformer entrance short-circuit current histogram when Fig. 3 is an embodiment one loop line road single-phase short circuit.
High-tension electricity transformer entrance short-circuit current histogram when generating a loop line road single-phase short circuit according to the short-circuit current of obtained high-tension electricity transformer porch and the shaft tower position pole tower ground resistance that is 1-20, from Fig. 4, we can find out that the high-tension electricity transformer entrance short-circuit current that pole tower ground resistance is less is general larger.
Refer to table 2.According to the electric current that described Tower Model produces, the short-circuit current that when obtaining two loop line road single-phase short circuits, Tower Model produces, especially the short-circuit current in outlet line first and second and the short-circuit current of high-tension electricity transformer porch, when obtaining producing short-circuit current, shaft tower position is power frequency grounding resistance value and the Tower Impulse Grounding Resistance value of the shaft tower of 1-20 simultaneously.
Table 2
Refer to Fig. 4, high-tension electricity transformer entrance short-circuit current histogram when Fig. 4 is an embodiment two loop line road single-phase short circuit.
High-tension electricity transformer entrance short-circuit current histogram when generating two loop line road single-phase short circuits according to the short-circuit current of obtained high-tension electricity transformer porch and the shaft tower position pole tower ground resistance that is 1-20, from Fig. 4, we can find out that the high-tension electricity transformer entrance short-circuit current that pole tower ground resistance is less is general larger.
Then the loop line road single-phase short circuit obtained and the short-circuit current of two loop line road single-phase short circuits and described tripping operation short-circuit current are compared, obtain the comparative result that short-circuit current is greater than described tripping operation short-circuit current.Next formula is utilized according to described comparative result
wherein, P represents amplitude of lightning current probability, and I represents amplitude of lightning current, must attend the meeting and cause the amplitude of lightning current probability that the amplitude of lightning current of high-tension electricity transformer lightning stroke trip is corresponding.Then the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion is obtained; The probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
The probability of the fault that is short-circuited when being subject to being struck by lightning by the high-tension electricity transformer of acquisition gathers in table 3.In table 3, " √ " represents that short-circuit current has the possibility causing high-tension electricity transformer lightning stroke trip.Lightning current outlet probability represents that in every 100 lightening activities, amplitude of lightning current exceedes the probability of this value.Such as amplitude of lightning current is the probability that the lightning current of 239kA occurs is 0.19%, represents that in every 100 thunderbolts, amplitude is 0.19 time more than the lightning current number of times of 239kA.Refer to table 3.
Table 3
Obtain high-tension electricity transformer be short-circuited when being subject to being struck by lightning fault probability after, the high-tension electricity transformer that the probability for the fault that is short-circuited is larger, strengthens its transmission line insulator performance.By improving transmission line of electricity lightning withstand level, reduce the number of times of transmission circuit insulator string generation flashover, thus the number of times causing high-tension electricity transformer transmission short trouble because short-circuit current is excessive can be reduced.
Also can connect before high-tension electricity transformer entrance in addition, before high-tension electricity transformer outlet during series inductive element, be equivalent to the electrical length adding circuit, or be equivalent to the leakage reactance value adding high-tension electricity transformer outgoing line side, zero-sequence current impedance loop is increased, can the amplitude of limiting short-circuit current with this, thus reduce the number of times that high-tension electricity transformer sends short trouble.
Meanwhile, also reactance component can be connected at high-tension electricity transformer neutral point place.After high-tension electricity transformer neutral point series connection low reactance, be equivalent to the zero sequence leakage reactance value changing high-tension electricity Transformer Winding, increase the impedance in zero-sequence current loop, thus can limiting short-circuit current amplitude, reduce the number of times that high-tension electricity transformer sends short trouble.
Refer to Fig. 5, Fig. 5 is an embodiment high-tension electricity transformer short circuit fault prediction unit structural representation.
A kind of high-tension electricity transformer short circuit fault prediction unit, comprising:
Building module 220, for obtaining the tripping operation short-circuit current of high-tension electricity transformer to be predicted, utilizing electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtain transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
Obtain current module 240, for utilizing described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtaining the electric current that described in simulation process, Tower Model produces, obtaining the short-circuit current that is struck by lightning;
Tripping operation probabilistic module 260, for described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
Prediction module 280, for the probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
Above-mentioned high-tension electricity transformer short circuit fault prediction unit, the tripping operation short-circuit current of what tripping operation short-circuit current adopted is actual high-tension electricity transformer to be predicted, tripping operation short-circuit current is input in electromagnetic transient simulation software simultaneously, prediction can be made so more accurate.Lightning test emulation meeting carries out lightning test in various degree to described Tower Model, thus more fully can obtain the electric current of described Tower Model generation, then can obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion more accurately.When described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, can lightning stroke trip be there is in high-tension electricity transformer, after all described thunderbolt short-circuit currents and described tripping operation short-circuit current being compared, the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion can be obtained.
In one embodiment, described acquisition current module 240 performs and utilizes described electromagnetic transient simulation software can comprise the process that described Tower Model carries out thunderbolt emulation:
Utilize thunder and lightning charge values, the Tower Model stake resistance of the acquisition of described electromagnetic transient simulation software for carrying out lightning test emulation, and according to described thunder and lightning charge values, Tower Model stake resistance, lightning test emulation is carried out to described shaft tower.
Situation when can be struck by lightning to described Tower Model more accurately by the thunder and lightning charge values for carrying out lightning test emulation, Tower Model stake resistance is emulated.
In one embodiment, the process that described acquisition current module 240 execution obtains the electric current that Tower Model produces described in simulation process can comprise:
Described electromagnetic transient simulation software is utilized to obtain the electric current of the described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit that Tower Model described in simulation process produces, and the electric current of two loop line roads single-phase short circuit simultaneously.
The electric current of described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit is the electric current of the single-phase short circuit produced when the situation that thunderbolt situation is lighter, and the while of described high-tension electricity transformer model outgoing line side two loop line road, the electric current of single-phase short circuit is the electric current of the single-phase short circuit produced when the situation that thunderbolt situation is more serious; The electric current obtaining single-phase short circuit while of electric current and the two loop line roads of described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit can be predicted high-tension electricity transformer to be measured more accurately according to different situations.
In one embodiment, the process tripping operation probability of lightning stroke trip occurring in described tripping operation probabilistic module 260 execution acquisition high-tension electricity transformer actual motion comprises following formula:
Wherein, P represents amplitude of lightning current probability, and I represents amplitude of lightning current.
Pass through
the amplitude of lightning current probability that amplitude of lightning current is corresponding can be calculated, thus the amplitude of lightning current probability causing the amplitude of lightning current of lightning stroke trip corresponding of can attending the meeting, then can obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion.
Above-mentioned high-tension electricity transformer short circuit fault prediction unit, by electromagnetic transient simulation software building transmission line of lightning strike structural model and to described Tower Model carry out thunderbolt emulation, thus obtain thunderbolt short-circuit current; The thunderbolt short-circuit current size degree of accuracy obtained is higher, thus make the probability degree of accuracy tripping operation short-circuit current of described thunderbolt short-circuit current and described high-tension electricity transformer being compared rear obtained generation lightning stroke trip higher, then can high-tension electricity transformer short circuit fault be predicted compared with high precision.
A kind of high-tension electricity transformer short circuit fault defence method, the probability of the short trouble according to above-mentioned any one to be 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 reinforcement transmission line insulator performance; If the probability of short trouble is not more than the value of setting in transformer entrance tandem electric inductance or reinforcement transmission line insulator performance.
In one embodiment, the threshold value of described setting can be 1 percent.
The threshold value of setting is that one of percentage can be better on the defensive measure to different short trouble.
Above-mentioned high-tension electricity transformer short circuit fault defence method, by carrying out the prediction compared with high precision to high-tension electricity transformer short circuit fault, thus good defensive measure can be carried out to high-tension electricity transformer, reduce the probability that high-tension electricity transformer short circuit fault occurs.
High-tension electricity transformer short circuit fault prediction unit of the present invention and high-tension electricity transformer short circuit fault Forecasting Methodology one_to_one corresponding of the present invention, above-mentioned high-tension electricity transformer short circuit fault Forecasting Methodology embodiment set forth technical characteristic and beneficial effect be all applicable to, in the embodiment of high-tension electricity transformer short circuit fault prediction unit, hereby state.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a high-tension electricity transformer short circuit fault Forecasting Methodology, is characterized in that, comprises the following steps:
Obtain the tripping operation short-circuit current of high-tension electricity transformer to be predicted, utilize electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtain transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
Utilize described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtain the electric current that described in simulation process, Tower Model produces, obtain the short-circuit current that is struck by lightning;
Described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
The probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
2. high-tension electricity transformer short circuit fault Forecasting Methodology according to claim 1, is characterized in that, described utilize described electromagnetic transient simulation software to described Tower Model carry out be struck by lightning emulation step comprise:
Utilize thunder and lightning charge values, the Tower Model stake resistance of the acquisition of described electromagnetic transient simulation software for carrying out lightning test emulation, and according to described thunder and lightning charge values, Tower Model stake resistance, lightning test emulation is carried out to described shaft tower.
3. high-tension electricity transformer short circuit fault Forecasting Methodology according to claim 1, is characterized in that, the step of the electric current that Tower Model described in described acquisition simulation process produces comprises:
Described electromagnetic transient simulation software is utilized to obtain the electric current of the described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit that Tower Model described in simulation process produces, and the electric current of two loop line roads single-phase short circuit simultaneously.
4. high-tension electricity transformer short circuit fault Forecasting Methodology according to claim 1, is characterized in that, the step that the tripping operation probability of lightning stroke trip occurs in described acquisition high-tension electricity transformer actual motion comprises following formula:
Wherein, P represents amplitude of lightning current probability, and I represents amplitude of lightning current.
5. a high-tension electricity transformer short circuit fault prediction unit, is characterized in that, comprising:
Building module, for obtaining the tripping operation short-circuit current of high-tension electricity transformer to be predicted, utilizing electromagnetic transient simulation software to carry out modeling to described high-tension electricity transformer, obtain transmission line of lightning strike structural model; Wherein, described transmission line of lightning strike structural model comprises high-tension electricity transformer model and Tower Model;
Obtain current module, for utilizing described electromagnetic transient simulation software to carry out lightning test emulation to described Tower Model, obtaining the electric current that described in simulation process, Tower Model produces, obtaining the short-circuit current that is struck by lightning;
Tripping operation probabilistic module, for described thunderbolt short-circuit current and described tripping operation short-circuit current are compared, obtain the comparative result that described thunderbolt short-circuit current is greater than described tripping operation short-circuit current, obtain the tripping operation probability that lightning stroke trip occurs in high-tension electricity transformer actual motion according to described comparative result;
Prediction module, for the probability of the fault that is short-circuited when being subject to being struck by lightning according to described tripping operation probability acquisition high-tension electricity transformer.
6. high-tension electricity transformer short circuit fault prediction unit according to claim 5, is characterized in that, described acquisition current module performs and utilizes described electromagnetic transient simulation software to comprise the process that described Tower Model carries out thunderbolt emulation:
Utilize thunder and lightning charge values, the Tower Model stake resistance of the acquisition of described electromagnetic transient simulation software for carrying out lightning test emulation, and according to described thunder and lightning charge values, Tower Model stake resistance, lightning test emulation is carried out to described shaft tower.
7. high-tension electricity transformer short circuit fault prediction unit according to claim 5, is characterized in that, described acquisition current module performs the process obtaining the electric current that Tower Model produces described in simulation process and comprises:
Described electromagnetic transient simulation software is utilized to obtain the electric current of the described high-tension electricity transformer model outgoing line side one loop line road single-phase short circuit that Tower Model described in simulation process produces, and the electric current of two loop line roads single-phase short circuit simultaneously.
8. high-tension electricity transformer short circuit fault prediction unit according to claim 5, is characterized in that, described tripping operation probabilistic module performs the process that the tripping operation probability of lightning stroke trip occurs in acquisition high-tension electricity transformer actual motion and comprises following formula:
Wherein, P represents amplitude of lightning current probability, and I represents amplitude of lightning current.
9. a high-tension electricity transformer short circuit fault defence method, is characterized in that, the probability of the short trouble according to any one of claim 1 to 8 to be 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 reinforcement transmission line insulator performance; If the probability of short trouble is not more than the threshold value of setting in transformer entrance tandem electric inductance or reinforcement transmission line insulator performance.
10. high-tension electricity transformer short circuit fault defence method according to claim 9, is characterized in that, the threshold value of described setting is one of percentage.
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| 彭鹏，粟时平，颜勤: "《变电站雷电侵入波保护的仿真分析》", 《电力科学与技术学报》 * |
| 林海渊，张孔林，廖福旺: "《某220kV变电站防雷保护仿真分析》", 《电力与电工》 * |
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| CN109241664A (en) * | 2018-09-29 | 2019-01-18 | 贵州电网有限责任公司 | A kind of analysis calculation method about wind-driven generator thunder and lightning electro-magnetic transient characteristic |
| 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 |
| CN113378375A (en) * | 2021-06-08 | 2021-09-10 | 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 |
| 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 |
| CN116504004A (en) * | 2023-06-21 | 2023-07-28 | 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 |
| 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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