CN105045974A - Method for lightning protection measure simulation of HUV transformer - Google Patents
Method for lightning protection measure simulation of HUV transformer Download PDFInfo
- Publication number
- CN105045974A CN105045974A CN201510379886.XA CN201510379886A CN105045974A CN 105045974 A CN105045974 A CN 105045974A CN 201510379886 A CN201510379886 A CN 201510379886A CN 105045974 A CN105045974 A CN 105045974A
- Authority
- CN
- China
- Prior art keywords
- lightning
- realistic model
- extra
- high voltage
- voltage transformer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a method for lightning protection measure simulation of an HUV (Ultra High Voltage) transformer. The method comprises the following steps of: 1, building an HUV transformer simulation model, a lightning simulation model and a lightning protection device simulation model; 2, changing factors influencing the lightning wave overvoltage, and transmitting lightning waves generated by acting the lightning simulation model onto a power transmission line to the HUV transformer simulation model along the power transmission line to produce overvoltage; and 3, installing the lightning protection device simulation model in the HUV transformer simulation model, transmitting the lightning waves generated by acting the lightning simulation model onto the power transmission line to the HUV transformer simulation model along the power transmission line, and performing lightning protection measure simulation. The method has the advantages that a work principle of the lightning protection measure of the HUV transformer in the lightning protection process is sufficiently realized; and the fault occurring probability of the HUV transformer due to lightning attack is reduced.
Description
Technical field
The present invention relates to a kind of power facility simulation method, particularly relate to a kind of emulation mode of extra-high voltage transformer lightning protection measures, belong to electric system simulation field.
Background technology
Along with the fast development of extra-high voltage technology, the importance of ultra-high voltage transformer station displays day by day.1000kV ultra-high voltage transformer station, compared with high pressure, Ultra-high Voltage Substations, presents some distinctive problems.Structurally also there are great changes in the extra-high voltage transformer in 1000kV ultra-high voltage transformer station relative to high pressure, EHV transformer.Extra-high voltage transformer is divided into main body transformer and regulating compensation transformer two parts, and principle of work is also greatly different.
In addition, China is vast in territory, a lot of areas of intelligent grid distribution, and thunderstorm weather happens occasionally, and transformer lightning protection measures becomes the very important part that substation safety runs.In existing transformer lightning protection measures, in the consideration of the method for operation, all with high pressure, EHV transformer for objective for implementation.But the extra-high voltage transformer of 1000kV ultra-high voltage transformer station and high pressure, EHV transformer are different.Extra-high voltage transformer thunder intrusion needs when calculating to consider normal operating mode and the special method of operation, and high pressure, EHV transformer only need to consider normal operating mode.
Wherein, the special method of operation refers to that extra-high voltage transformer line side isolating switch or disconnector are in the single line method of operation of open-circuit condition, and its superpotential is the most serious, but the probability occurred is very low.Therefore, extra-high voltage transformer lightning protection measures technology itself, compared with existing high pressure, UHV (ultra-high voltage) lightning protection measures technology, has certain advance.Due to the advance of extra-high voltage transformer lightning protection measures technology itself and probability of occurrence low, domestic more rare for simulation study in this respect at present, if to such an extent as to want that the working mechanism of the lightning protection measures understanding extra-high voltage transformer is very difficult.
Therefore, extra-high voltage transformer once attack due to thunder and lightning breaks down, and site environment is dangerous property not only, and easily damages expensive device and cause very large economic loss.So, its principle of work is understood by the research of the emulation to extra-high voltage transformer lightning protection measures, become the active demand of electric system, and extra-high voltage transformer lightning protection measures is optimized on the basis understanding its principle of work, reduce extra-high voltage transformer and attack the possibility broken down due to thunder and lightning, very necessary.
Summary of the invention
For the deficiencies in the prior art, technical matters to be solved by this invention is the emulation mode providing a kind of extra-high voltage transformer lightning protection measures.
For achieving the above object, the present invention adopts following technical scheme:
An emulation mode for extra-high voltage transformer lightning protection measures, comprises the steps:
S1, sets up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model;
S2, thunder and lightning realistic model is applied on transmission line of electricity and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity, change and affect the superpotential factor of lightning wave, lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity and causes superpotential;
S3, installs lightning protection utensil realistic model in extra-high voltage transformer realistic model, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces and is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carry out lightning protection measures emulation.
Wherein more preferably, in step sl, set up extra-high voltage transformer realistic model to comprise the steps:
S11, is equivalent to a three-winding autotransformer realistic model by main-transformer realistic model and regulating compensation transformer realistic model;
S12, by end to end for the winding of 2 in three-winding autotransformer realistic model, form high and medium voltage winding, simulates extra-high voltage transformer model;
S13, in conjunction with the electromagnetic relationship between three winding, sets up the voltage expression of each winding of extra-high voltage three-winding autotransformer realistic model;
S14, obtains the equivalent electrical circuit of three-winding autotransformer realistic model according to voltage expression.
Wherein more preferably, described thunder and lightning realistic model comprises lightning current waveform, lightning current polarity and the impedance of lightning current channel wave to the lightning parameter that extra-high voltage transformer realistic model is had an effect;
Wherein lightning current polarity is determined by the polarity of lightning current when being struck by lightning first.
Wherein more preferably, described lightning current waveform adopts following formula to try to achieve:
Wherein, I
0for peak point current; H is the correction factor of peak point current; τ
1for wave-head time constant; τ
2for wave rear time constant.
Wherein more preferably, the impedance of described lightning current channel wave is used for describing current i when lightning current flows through extra-high voltage transformer
z:
wherein, i
0for zero current, Z is wave impedance, Z
0for the impedance of lightning current channel wave.
Wherein more preferably, in step s 2, affect the superpotential factor of lightning wave and comprise lightning current size and amplitude probability distribution, lightning strike spot position, wire operating voltage.
Wherein more preferably, adopt the statistic procedure of normal distribution, calculate the scope of described lightning current size and amplitude probability distribution when causing superpotential, lightning strike spot position, wire operating voltage.
Wherein more preferably, adopt the statistic procedure of normal distribution, calculate the scope of described wire operating voltage when causing superpotential, comprise the steps:
S21, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces when being delivered on extra-high voltage transformer realistic model along transmission line of electricity, by all value N (pi/2, the σ of wire operating voltage
2) probability density function represent, the stochastic variable of probability density function gets a complete cycle;
S22, sets superpotential probability according to demand, according to superpotential probability and probability density function, determines the span causing superpotential wire operating voltage;
S223, in the span causing superpotential wire operating voltage, emulation of being repeatedly struck by lightning, verifies the span of wire operating voltage by the magnitude of voltage obtained.
Wherein more preferably, in step s 4 which, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, comprise the steps:
S41, installs lightning protection utensil realistic model, according to formula in extra-high voltage transformer realistic model:
calculate the current i flowing through extra-high voltage transformer realistic model
z; Wherein, i
0for zero current, Z
0for the impedance of lightning current channel wave, Z is wave impedance;
S42, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, and calculating the current i flowing through extra-high voltage transformer realistic model
z;
S43, repeats step S42, calculates lightning protection utensil realistic model when different installation site and installation quantity, flows through the current i of extra-high voltage transformer realistic model
z;
S44, finds out the current i flowing through extra-high voltage transformer realistic model
zminimum value, namely obtain the best lightning protection utensil realistic model of lightning protection effect installation site and install quantity.
Wherein more preferably, the emulation mode of described extra-high voltage transformer lightning protection measures, also comprises the steps:
S4, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity.
The emulation mode of extra-high voltage transformer lightning protection measures provided by the present invention, by setting up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model, fully understands the principle of work of extra-high voltage transformer lightning protection measures.Affecting the superpotential factor of lightning wave by changing in thunder and lightning realistic model, lightning wave being delivered on extra-high voltage transformer realistic model along transmission line of electricity and causing superpotential, Different factor can be observed on the superpotential impact of thunder and lightning realistic model Intruding wave.In addition, change the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and quantity is installed, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, realize the optimization that lightning arrester realistic model is arranged, optimize extra-high voltage transformer lightning protection measures, reduce extra-high voltage transformer and attack the possibility broken down due to thunder and lightning.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the emulation mode of extra-high voltage transformer lightning protection measures provided by the present invention;
Fig. 2 is in emulation mode provided by the invention, the structural representation of extra-high voltage three-winding autotransformer;
Fig. 3 is in emulation mode provided by the invention, the equivalent circuit diagram of extra-high voltage single-phase three-winding autotransformer;
Fig. 4 is in an embodiment provided by the invention, the structural representation that in extra-high voltage transformer lightning protection measures emulation mode, lightning arrester is arranged.
Embodiment
Below in conjunction with the drawings and specific embodiments, detailed specific description is carried out to technology contents of the present invention.
As shown in Figure 1, in the emulation mode of extra-high voltage transformer lightning protection measures provided by the present invention, comprise the steps: first, set up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model.Then, thunder and lightning realistic model is applied on transmission line of electricity and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity, change and affect the superpotential factor of lightning wave, lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity and causes superpotential.In the superpotential situation of generation, lightning protection utensil realistic model is installed in extra-high voltage transformer realistic model, thunder and lightning realistic model being applied to the lightning wave that transmission line of electricity produces is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carries out lightning protection measures emulation.Finally, change the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and install quantity, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, realize the optimization of lightning protection measures.Detailed specific description is done to this process below.
S1, sets up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model.
In the emulation mode of extra-high voltage transformer lightning protection measures provided by the invention, the realistic model of application mainly contains: extra-high voltage transformer model, lightning models, lightning protection utensil model, circuit and bus model, isolating switch model, disconnector model etc.Wherein, circuit and bus model, isolating switch model, disconnector model etc., in the simulation process of extra-high voltage transformer lightning protection measures, for it provides circuit and bus, isolating switch, disconnector etc., are existing conventional model, have just repeated no more at this.To the Realization of Simulation of the present invention important be extra-high voltage transformer model, lightning models, lightning protection utensil model, the extra-high voltage transformer realistic model created the present invention below, thunder and lightning realistic model and lightning protection utensil realistic model are introduced respectively.
Extra-high voltage transformer is divided into main body transformer and regulating compensation transformer two parts, and wherein main body transformer adopts single-phase, oil immersed type autotransformer, single-phase four column iron cores, high, medium and low voltage winding multicolumn parallel-connection structure.Regulating compensation transformer presses neutral point off circuit tap changing transfor mer and low-voltage compensation device to form by sharing in a fuel tank.
Due in extra-high voltage transformer realistic model it is of concern that transformer each side electric current and voltage, when the present invention sets up extra-high voltage transformer realistic model, specifically comprise the steps:
S11, is equivalent to a three-winding autotransformer realistic model by main-transformer realistic model and regulating compensation transformer realistic model.
S12, considers in autotransformer realistic model the contact of " electricity " of winding of connecting, public winding, by end to end for the winding of 2 in three-winding autotransformer realistic model, form high and medium voltage winding, simulates extra-high voltage transformer model.Structural drawing as shown in Figure 2, the 1st in figure, 2,3 windings simulate low pressure winding, series connection winding and public winding respectively.
S13, in conjunction with the electromagnetic relationship between three winding, sets up the voltage expression of each winding of extra-high voltage three-winding autotransformer realistic model.
S14, obtains the equivalent electrical circuit of three-winding autotransformer realistic model according to voltage expression.Equivalent circuit diagram as shown in Figure 3.
The autotransformer major parameter adopted during emulation is as shown in table 1 below:
Table 1 extra-high voltage three-winding autotransformer realistic model major parameter
Thunder and lightning realistic model is mainly used for acting on extra-high voltage transformer realistic model, to study thunder and lightning on the impact of extra-high voltage transformer and how to take lightning protection measures.From the angle analysis of lightning protection, thunder and lightning can be regarded as the process of lightning channel to extra-high voltage transformer propagation of electromagnetic waves that there is wave impedance along.Therefore, the lightning parameter of considerable influence is had to mainly contain lightning current waveform, lightning current polarity and the impedance of lightning current channel wave to extra-high voltage transformer.
Wherein, in embodiment provided by the present invention, the analytical expression (1) adopting International Electrotechnical Commission (EIC) to specify describes lightning current waveform:
Wherein, I
0for peak point current; H is the correction factor of peak point current; τ
1for wave-head time constant; τ
2for wave rear time constant.
Consider the importance of extra-high voltage transformer, in realistic model, the protection level of extra-high voltage transformer is set to I grade, according to the priority that thunderbolt occurs, thunderbolt is divided into thunderbolt and follow-up thunderbolt first.Under protection level I grade, each parameter value of lightning current waveform is as shown in table 2 below:
The parameter values table of table 2 lightning current waveform
For lightning current polarity, in embodiment provided by the present invention, ignore the impact of the factors such as season, weather, landform, because the negative harm of lightning to extra-high voltage transformer is maximum first, and data shows according to statistics, 75% ~ 90% is negative lightning, and the polarity therefore defining lightning current is negative.
Electric current when lightning current flows through extra-high voltage transformer is relevant with the wave impedance Z of transformer, if electric current when definition is zero by the wave impedance of hitting object is zero current i
0, current i when the known wave impedance flowing through extra-high voltage transformer is Z
zwith the pass of zero current be:
Wherein, initial lightning current channel wave impedance Z
0=300 Ω, electric current when lightning current flows through extra-high voltage transformer and the wave impedance Z=0 Ω of transformer.
When thunder and lightning realistic model acts on extra-high voltage transformer realistic model, by installing lightning protection utensil realistic model in extra-high voltage transformer realistic model, lightning protection measures emulation can be carried out.On lightning protection measures is selected, in embodiment provided by the present invention, mainly adopting lightning arrester, is a kind of proterctive equipment discharging superpotential energy limited Overvoltage Amplitude.Lightning arrester is divided into expulsion type arrester, valve arrester and metal oxide arrester.With reference to the characteristic of different lightning arrester, the present invention chooses gapless metal-oxide lighting arrester (MOA) as typical lightning protection utensil.
In gapless metal-oxide lighting arrester realistic model (lightning arrester realistic model), Specifeca tion speeification has: rated voltage, power frequency reference voltage, absorption energy etc.The parameter of the model used in simulations is as shown in table 3:
Table 3MOA lightning arrester realistic model technical parameter
S2, thunder and lightning realistic model is applied on transmission line of electricity and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity, change and affect the superpotential factor of lightning wave, lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity and causes superpotential.
In embodiment provided by the present invention, only emulate for the Lightning Incoming Wave hit on wire (lightning wave), on shaft tower realistic model thunder and lightning realistic model being applied to transmission line of electricity or lightning conducter realistic model, at this moment insulator realistic model flashover (counterattack) will produce lightning wave; Or thunder and lightning realistic model directly hits (shielding) on wire realistic model and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity realistic model.When not all lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity realistic model, all superpotential can be caused.
Affect the superpotential factor of lightning wave a lot, in embodiment provided by the present invention, mainly comprise the factor such as lightning current size and amplitude probability distribution, lightning strike spot position, wire operating voltage.Affecting the superpotential factor of lightning wave by changing, when lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity, causing superpotential.
Now, for influence factor wire operating voltage, introduce the statistical method utilizing normal distribution, when causing lightning wave superpotential, calculate the span of wire operating voltage, specifically comprise the steps:
S21, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces when being delivered on extra-high voltage transformer realistic model along transmission line of electricity, by all value N (pi/2, the σ of wire operating voltage
2) probability density function represent, the stochastic variable of probability density function get a complete cycle (-pi/2,3 pi/2s].
In embodiment provided by the present invention, suppose that phase voltage (wire operating voltage) is
, all value probability density functions of phase voltage are represented, consider 1 complete cycle (-pi/2,3 pi/2s], make complete cycle (-pi/2,3 pi/2s] in, probability density function can get all values that phase voltage can be got.
S22, sets superpotential probability according to demand, according to superpotential probability and probability density function, determines the span causing superpotential wire operating voltage.
If the statistical law of wire voltage phase angle is take pi/2 as the normal distribution of average during thunderbolt.Under normal curve (its average is μ, and standard deviation is σ), transverse axis interval is (μ-1.96 σ, μ+1.96 σ) in area be 95.45%, in embodiment provided by the present invention, get the probability of 95%, make (-pi/2,3 pi/2s] burst length be 4 σ.According to superpotential probability and probability density function, determine the span causing superpotential wire operating voltage.The number of lightning strokes of simulating as stated above is 150 times, and calculating superpotential statistical value is 2459kV.Wherein, statistical value is the superpotential mean value of 150 number of lightning strokes generations that delivery is intended.
S223, in the span causing superpotential wire operating voltage, emulation of being repeatedly struck by lightning, verifies the accuracy of the span of wire operating voltage by the magnitude of voltage obtained.
In extra-high voltage transformer thunderbolt emulation, in the method for operation, ultra-high voltage transformer station thunder intrusion calculates to be needed to emulate normal operating mode and the special method of operation two kinds of modes.
During emulation, when the combination of all circuit emulation models, bus realistic model and extra-high voltage transformer realistic model is put into operation, carry out the emulation of transformer station's normal operating mode.Emulation for the special method of operation is that the single line method of operation by substation line side isolating switch realistic model or disconnector realistic model being in open-circuit condition realizes.
When transformer station is in different running method, extra-high voltage transformer lightning stroke process is emulated, the mechanism of action between lightning wave model and extra-high voltage transformer model can be emulated vividly, simultaneously by changing the parameter such as lightning current size and amplitude probability distribution, lightning strike spot position, wire operating voltage, the interact relation of each factor and lightning surge can be understood intuitively, when lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity, cause superpotential.
For lightning current size and the factor such as amplitude probability distribution, lightning strike spot position, the statistical method of normal distribution is utilized to calculate the superpotential realization of lightning wave, similar with the calculation procedure of influence factor wire operating voltage, just repeat no more at this.
S3, in the superpotential situation of generation, lightning protection utensil realistic model is installed in extra-high voltage transformer realistic model, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces and is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carry out lightning protection measures emulation.
In the superpotential situation of generation, lightning protection utensil realistic model is installed in extra-high voltage transformer realistic model, thunder and lightning realistic model being applied to the lightning wave that transmission line of electricity produces is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carries out lightning protection measures emulation.In embodiment provided by the present invention, mainly adopt lightning arrester (MOA) as lightning protection utensil realistic model.
S4, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity.
Because the spacing distance between extra-high voltage transformer and MOA is larger, poorer to the protective effect of equipment.Therefore the arrangement of MOA has larger impact to restriction thunder intrusion.In addition, the quantity put into operation due to lightning arrester is more, the expense of engineering construction investment and operation maintenance is corresponding higher, therefore in embodiment provided by the present invention, change the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and quantity is installed, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, specifically comprise the steps:
S41, installs lightning protection utensil realistic model in extra-high voltage transformer realistic model, and according to formula:
current i when to calculate the wave impedance flowing through extra-high voltage transformer realistic model be Z
z; Wherein, i
0for zero current, Z
0for the impedance of lightning current channel wave.
In an embodiment provided by the present invention, choose place's zinc oxide surge arresters realistic models such as extra-high voltage transformer realistic model place, bus realistic model place, circuit emulation mold exit.Arrangenent diagram is shown in accompanying drawing 4.According to formula:
current i when to calculate the wave impedance flowing through extra-high voltage transformer realistic model be Z
z.
S42, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, and current i when to calculate the wave impedance flowing through extra-high voltage transformer be Z
z.
In arrangenent diagram, along with lightning arrester installation site and the change of installing quantity, formula:
in lightning wave channel wave impedance Z
0and wave impedance Z can change, thus affect the lightning protection effect of lightning arrester.
S43, repeats step S42, calculate lightning protection utensil realistic model in different installation site and quantity is installed time, the current i when wave impedance flowing through extra-high voltage transformer realistic model is Z
z.
S44, current i when to find out the wave impedance flowing through extra-high voltage transformer realistic model be Z
zminimum value, be the best lightning protection utensil realistic model of lightning protection effect installation site and install quantity.
Therefore, by changing installation quantity and the installation site of lightning arrester realistic model (lightning protection utensil realistic model), can observe varying number, diverse location place lightning arrester realistic model to the protection effect of extra-high voltage transformer realistic model, thus reach the effect optimized lightning arrester realistic model and arrange.
In sum, the emulation mode of extra-high voltage transformer lightning protection measures provided by the present invention, by setting up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model.Thunder and lightning realistic model is applied on transmission line of electricity and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity, change and affect the superpotential factor of lightning wave, lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity and causes superpotential.In the superpotential situation of generation, lightning protection utensil realistic model is installed in extra-high voltage transformer realistic model, thunder and lightning realistic model being applied to the lightning wave that transmission line of electricity produces is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carry out lightning protection measures emulation, fully understand in the principle of work of extra-high voltage transformer lightning protection measures in anti-ray process.In addition, by changing the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installing quantity, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, realize the optimization of lightning protection measures.Carrying out the principle of work of extra-high voltage transformer lightning protection measures extra-high voltage transformer lightning protection measures is optimized on the basis fully understood, reducing extra-high voltage transformer due to thunder and lightning and attack the possibility broken down.
Above the emulation mode of extra-high voltage transformer lightning protection measures provided by the present invention is described in detail.For one of ordinary skill in the art, to any apparent change that it does under the prerequisite not deviating from connotation of the present invention, all by formation to infringement of patent right of the present invention, corresponding legal liabilities will be born.
Claims (10)
1. an emulation mode for extra-high voltage transformer lightning protection measures, is characterized in that comprising the steps:
S1, sets up extra-high voltage transformer realistic model, thunder and lightning realistic model and lightning protection utensil realistic model;
S2, thunder and lightning realistic model is applied on transmission line of electricity and produces lightning wave, the lightning wave of generation is delivered on extra-high voltage transformer realistic model along transmission line of electricity, change and affect the superpotential factor of lightning wave, lightning wave is delivered on extra-high voltage transformer realistic model along transmission line of electricity and causes superpotential;
S3, installs lightning protection utensil realistic model in extra-high voltage transformer realistic model, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces and is delivered on extra-high voltage transformer realistic model along transmission line of electricity, carry out lightning protection measures emulation.
2. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 1, is characterized in that in step sl, sets up extra-high voltage transformer realistic model and comprise the steps:
S11, is equivalent to a three-winding autotransformer realistic model by main-transformer realistic model and regulating compensation transformer realistic model;
S12, by end to end for the winding of 2 in three-winding autotransformer realistic model, form high and medium voltage winding, simulates extra-high voltage transformer model;
S13, in conjunction with the electromagnetic relationship between three winding, sets up the voltage expression of each winding of extra-high voltage three-winding autotransformer realistic model;
S14, obtains the equivalent electrical circuit of three-winding autotransformer realistic model according to voltage expression.
3. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 1, is characterized in that:
Described thunder and lightning realistic model comprises lightning current waveform, lightning current polarity and the impedance of lightning current channel wave to the lightning parameter that extra-high voltage transformer realistic model is had an effect;
Wherein lightning current polarity is determined by the polarity of lightning current when being struck by lightning first.
4. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 3, is characterized in that:
Described lightning current waveform adopts following formula to try to achieve:
Wherein, I
0for peak point current; H is the correction factor of peak point current; τ
1for wave-head time constant; τ
2for wave rear time constant.
5. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 3, is characterized in that:
The impedance of described lightning current channel wave is used for describing current i when lightning current flows through extra-high voltage transformer
z:
wherein, i
0for zero current, Z is wave impedance, Z
0for the impedance of lightning current channel wave.
6. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 1, is characterized in that:
In step s 2, affect the superpotential factor of lightning wave and comprise lightning current size and amplitude probability distribution, lightning strike spot position, wire operating voltage.
7. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 6, is characterized in that:
Adopt the statistic procedure of normal distribution, calculate the scope of described lightning current size and amplitude probability distribution when causing superpotential, lightning strike spot position, wire operating voltage.
8. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 7, is characterized in that, adopts the statistic procedure of normal distribution, calculates the scope of described wire operating voltage when causing superpotential, comprises the steps:
S21, thunder and lightning realistic model is applied to the lightning wave that transmission line of electricity produces when being delivered on extra-high voltage transformer realistic model along transmission line of electricity, by all value N (pi/2, the σ of wire operating voltage
2) probability density function represent, the stochastic variable of probability density function gets a complete cycle;
S22, sets superpotential probability according to demand, according to superpotential probability and probability density function, determines the span causing superpotential wire operating voltage;
S223, in the span causing superpotential wire operating voltage, emulation of being repeatedly struck by lightning, verifies the span of wire operating voltage by the magnitude of voltage obtained.
9. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 1, is characterized in that in step s 4 which, and the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity, comprise the steps:
S41, installs lightning protection utensil realistic model, according to formula in extra-high voltage transformer realistic model:
calculate the current i flowing through extra-high voltage transformer realistic model
z; Wherein, i
0for zero current, Z
0for the impedance of lightning current channel wave, Z is wave impedance;
S42, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, and calculating the current i flowing through extra-high voltage transformer realistic model
z;
S43, repeats step S42, calculates lightning protection utensil realistic model when different installation site and installation quantity, flows through the current i of extra-high voltage transformer realistic model
z;
S44, finds out the current i flowing through extra-high voltage transformer realistic model
zminimum value, namely obtain the best lightning protection utensil realistic model of lightning protection effect installation site and install quantity.
10. the emulation mode of extra-high voltage transformer lightning protection measures as claimed in claim 1, characterized by further comprising following steps:
S4, changes the installation site of lightning protection utensil realistic model in extra-high voltage transformer realistic model and installs quantity, the installation site of the lightning protection utensil realistic model finding lightning protection effect best and installation quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510379886.XA CN105045974A (en) | 2015-07-01 | 2015-07-01 | Method for lightning protection measure simulation of HUV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510379886.XA CN105045974A (en) | 2015-07-01 | 2015-07-01 | Method for lightning protection measure simulation of HUV transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105045974A true CN105045974A (en) | 2015-11-11 |
Family
ID=54452517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510379886.XA Pending CN105045974A (en) | 2015-07-01 | 2015-07-01 | Method for lightning protection measure simulation of HUV transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105045974A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229959A (en) * | 2016-08-12 | 2016-12-14 | 中国电力科学研究院 | A kind of extra high voltage direct current transmission line Overvoltage suppressing method |
| CN106249319A (en) * | 2016-07-13 | 2016-12-21 | 成都信息工程大学 | WRF pattern is to the analogy method of sudden strain of a muscle activity by force in multi-cell storm |
| CN106570241A (en) * | 2016-10-25 | 2017-04-19 | 中国电力科学研究院 | Method and system for adjusting layout of lightning arrester of ultra high voltage direct current converter station |
| CN106991263A (en) * | 2017-05-25 | 2017-07-28 | 清华大学 | A kind of modeling method of mesolow distribution transformer winding thunder and lightning wideband model |
| CN107834491A (en) * | 2017-11-08 | 2018-03-23 | 南方电网科学研究院有限责任公司 | A kind of collocation method of current conversion station A type arresters |
| CN109948193A (en) * | 2019-02-26 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | Interconnect the rail traction substation lightning stroke safety evaluation method of integrated ground system |
| CN111597697A (en) * | 2020-05-08 | 2020-08-28 | 国网山东省电力公司电力科学研究院 | Extra-high voltage same-tower double-circuit line arrester arrangement optimization method |
| CN112018745A (en) * | 2020-08-11 | 2020-12-01 | 昆明理工大学 | Optimal configuration method for suppressing half-wavelength alternating current and direct current system overvoltage arrester caused by direct current fault |
| CN112865007A (en) * | 2021-01-05 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Lightning protection method, device, equipment and storage medium for 10kV distribution network transformer |
| CN114184842A (en) * | 2021-11-15 | 2022-03-15 | 西南交通大学 | Method for evaluating performance of ZnO resistor disc under multiple pulses based on energy absorption |
| CN117970037A (en) * | 2024-03-29 | 2024-05-03 | 昆明理工大学 | SOD change-based multiple lightning identification method for power transmission line |
-
2015
- 2015-07-01 CN CN201510379886.XA patent/CN105045974A/en active Pending
Non-Patent Citations (7)
| Title |
|---|
| XIAO ZHANG等: "Lightning overvoltage suppression of power transformer in UHV GIS by ferromagnetic ring", 《2011 7TH ASIA-PACIFIC INTERNATIONAL CONFERENCE ON LIGHTNING》 * |
| 向军: "1000kV特高压变电站雷电侵入波的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑（月刊）》 * |
| 周浩等: "《特高压交直流输电技术》", 30 June 2014, 浙江大学出版社 * |
| 岳昊等: "特高压交流***三绕组自耦变压器非线性模型的研究", 《电工电能新技术》 * |
| 曾麟钧等: "特高压自耦变压器的建模和电磁暂态仿真", 《中国电机工程学报》 * |
| 查申森: "特高压变电站雷电侵入波防护研究", 《电力学报》 * |
| 陈水明等: "计及工频电压的特高压变电站雷电侵入波过电压分析", 《高电压技术》 * |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249319A (en) * | 2016-07-13 | 2016-12-21 | 成都信息工程大学 | WRF pattern is to the analogy method of sudden strain of a muscle activity by force in multi-cell storm |
| CN106249319B (en) * | 2016-07-13 | 2018-11-13 | 成都信息工程大学 | WRF patterns are to dodging by force movable analogy method in multi-cell storm |
| CN106229959B (en) * | 2016-08-12 | 2020-07-24 | 中国电力科学研究院 | Overvoltage suppression method for extra-high voltage direct current transmission line |
| CN106229959A (en) * | 2016-08-12 | 2016-12-14 | 中国电力科学研究院 | A kind of extra high voltage direct current transmission line Overvoltage suppressing method |
| CN106570241A (en) * | 2016-10-25 | 2017-04-19 | 中国电力科学研究院 | Method and system for adjusting layout of lightning arrester of ultra high voltage direct current converter station |
| CN106991263A (en) * | 2017-05-25 | 2017-07-28 | 清华大学 | A kind of modeling method of mesolow distribution transformer winding thunder and lightning wideband model |
| CN107834491A (en) * | 2017-11-08 | 2018-03-23 | 南方电网科学研究院有限责任公司 | A kind of collocation method of current conversion station A type arresters |
| CN107834491B (en) * | 2017-11-08 | 2019-11-01 | 南方电网科学研究院有限责任公司 | A kind of configuration method of converter station A type arrester |
| CN109948193A (en) * | 2019-02-26 | 2019-06-28 | 中铁第四勘察设计院集团有限公司 | Interconnect the rail traction substation lightning stroke safety evaluation method of integrated ground system |
| CN111597697A (en) * | 2020-05-08 | 2020-08-28 | 国网山东省电力公司电力科学研究院 | Extra-high voltage same-tower double-circuit line arrester arrangement optimization method |
| CN111597697B (en) * | 2020-05-08 | 2024-02-02 | 国网山东省电力公司电力科学研究院 | Arrangement optimization method for extra-high voltage same-tower double-circuit line lightning arresters |
| CN112018745A (en) * | 2020-08-11 | 2020-12-01 | 昆明理工大学 | Optimal configuration method for suppressing half-wavelength alternating current and direct current system overvoltage arrester caused by direct current fault |
| CN112865007A (en) * | 2021-01-05 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Lightning protection method, device, equipment and storage medium for 10kV distribution network transformer |
| CN114184842A (en) * | 2021-11-15 | 2022-03-15 | 西南交通大学 | Method for evaluating performance of ZnO resistor disc under multiple pulses based on energy absorption |
| CN114184842B (en) * | 2021-11-15 | 2022-08-09 | 西南交通大学 | Method for evaluating performance of ZnO resistor disc under multiple pulses based on energy absorption |
| CN117970037A (en) * | 2024-03-29 | 2024-05-03 | 昆明理工大学 | SOD change-based multiple lightning identification method for power transmission line |
| CN117970037B (en) * | 2024-03-29 | 2024-06-07 | 昆明理工大学 | SOD change-based multiple lightning identification method for power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105045974A (en) | Method for lightning protection measure simulation of HUV transformer | |
| CN102841280B (en) | Method for simulating lightning trip-out rates of 500kV transmission line with four circuits on same tower | |
| CN108228976B (en) | Modeling method for matching configuration and insulation of lightning arrester of typical power plant | |
| CN102435921B (en) | The decision method of same tower double back transmission line insulation and resistance to lightning impulse performance | |
| CN103324788A (en) | Lightning stroke characteristic assessment method | |
| CN101216864A (en) | Large cross line total lighting strike tripping rate emulated computation method | |
| CN102175936B (en) | Unrestrictive expected operation life assessment method for distribution network lightning arrester under given confidence level | |
| CN108832607B (en) | Insulation matching method and system for symmetrical bipolar flexible direct current engineering converter station | |
| CN105243176A (en) | Graphic analysis method for optimization configuration of lightning arrester on 110kV/220kV power transmission line | |
| CN104319733A (en) | Neutral point grounding impedance device of transformer and multipurpose direct current magnetic bias protection method of impedance device | |
| CN103078318B (en) | Overvoltage improvement method on basis of historical data of overhead power transmission line | |
| CN105811389B (en) | The high anti-neutral point MOA of 750kV circuits and dielectric level determination method for parameter | |
| CN112054459A (en) | Lightning protection method for distribution line | |
| CN106570241A (en) | Method and system for adjusting layout of lightning arrester of ultra high voltage direct current converter station | |
| CN111525436A (en) | Lightning invasion wave prevention and control method for 500kV booster station of power plant | |
| Abd-Allah et al. | Towards an accurate modeling of frequency-dependent wind farm components under transient conditions | |
| CN104537137A (en) | A prediction method, a prediction device, and a defense method for a short circuit fault of a high-voltage power transformer | |
| CN204304426U (en) | Anti-counterattack thunder device | |
| WO2020011040A1 (en) | Self-energy-consuming type circuit integrated lightning protection apparatus | |
| CN105894208A (en) | Low-voltage distribution line lightning stroke risk assessment method and apparatus | |
| CN104682305A (en) | Method for differentiated lightning protection of urban 10 kV distribution line | |
| CN104682304A (en) | Suburb 10kV power distribution line differentiated lightning-protection method | |
| Wang et al. | Optimization of Lightning Protection System for 10 kV Distribution Network Based on Yalmip Toolbox | |
| CN105044486B (en) | Overvoltage computation model for new energy power station low-voltage ride-through testing system | |
| Habash et al. | Lightning risk assessment of power systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151111 |
|
| RJ01 | Rejection of invention patent application after publication |