CN104360226B - Method for monitoring fault of cable outgoing lines of transformer substation on basis of current initial traveling wave polarity - Google Patents
Method for monitoring fault of cable outgoing lines of transformer substation on basis of current initial traveling wave polarity Download PDFInfo
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Abstract
The invention discloses a method for monitoring fault of cable outgoing lines of a transformer substation on the basis of current initial traveling wave polarity. Each outgoing line of the transformer substation is provided with a current transformer; and the current transformers are connected with a current initial traveling wave analyzing device. The method comprises the following steps of establishing a cable outgoing line fault simulation model of the transformer substation according to the cable outgoing lines and a distribution network model of the transformer substation; acquiring three-phase current of each outgoing line by using the corresponding current transformer so as to acquire current initial traveling wave of each outgoing line by using the current initial traveling wave analyzing device; and analyzing the current initial traveling wave to confirm a faulty line. By the method, the cable outgoing lines of the transformer substation and distribution lines can be selected, current initial traveling wave characteristics are different when single-phase earth faults occur at different positions, the problem that lines are selected difficultly in the existing small-current earth system is solved by polarity comparison of current initial traveling waves of various phases after single-phase earth faults of the system, and the method is reliable and economical.
Description
Technical field
The present invention relates to a kind of fault monitoring method of substation cable outlet, specifically a kind of initial based on electric current
The substation cable outlet fault monitoring method of polarity of traveling wave, belongs to cable fault route selection technical field.
Background technology
China's power distribution network widely used neutral non-effective grounding mode, it is high that this earthing mode has power supply reliability
Advantage, its singlephase earth fault incidence rate highest.After there is singlephase earth fault, non-faulting phase voltage rises a height of original
1.732 times, under individual cases, earthing capacitance current may cause trouble point electric arc to leap, and instantaneously occurs big 4-5 times than phase voltage
Overvoltage, lead to insulation breakdown, be expanded into further 2 points or multipoint earthing short circuit；The electric arc of trouble point also can cause complete set
System overvoltage, usually burns cable and even causes fire.Therefore, the singlephase earth fault of power distribution network seriously threatens this power distribution network
Security reliability, is that Accident prevention expands, wishes to select faulty line as early as possible and processed in operation.But due to single-phase
Ground connection is the short-circuit loop that distribution capacity is formed over the ground by power supply winding and transmission line of electricity, and the earth current of trouble point is very
Little, single-phase earth fault line selection and fault-location problem are not solved for a long time well.
In order to find out trouble point, use the selection method manually drawing road in the past, affected by various factors, this side
Method is found out faulty line and is taken long enough, and reduces the quality of power supply so that power supply unit is subject to the economic benefit of user
Impact.And electrical network is easily switched off and impacting of closing, and can lead to switching overvoltage and resonance overvoltage, switch
Perseveration again such that its service life reduce.With increasing of unattended operation transformer station and carrying of automation level
Height, one is that sometimes centralized control center staff finds and the time of process ground signalling is longer, and especially evening occurs
Fault-signal is it may appear that the long playing situation of tape jam；Two is to draw road route selection to need remote control to operate one by one, increases
The burden of equipment.
In currently practical work, power distribution network commonly used transient zero-sequence current method carries out route selection, temporary using faulty line
The polarity of the initial traveling wave of state zero mould electric current and this principle failure judgement circuit of the opposite polarity of non-fault line, the method has
The high advantage of reliability.But the acquisition of modulus traveling-waves increased the difficulty of scene application in actual motion.Obtain zero mould electric current
Traveling wave needs scene to be equipped with suitable zero sequence current mutual inductor, and it is uneconomical to increase zero sequence current mutual inductor only for failure line selection
And the method using zero mould route selection cannot realize phase selection.If not using ZCT, it is to pass through that line mould current traveling wave obtains
Biphase current transformer, wiring is complicated and easily malfunctions, and so makes failure line selection more difficult.
Rapidly and accurately failure line selection one side is conducive to improving power supply reliability, improves the economy of power supply department and user
Benefit, is on the other hand conducive to safeguarding electrical equipment, therefore, in the urgent need to a kind of effective substation cable outlet malfunction monitoring
Method.
Content of the invention
For overcoming the shortcomings of above-mentioned prior art presence, the invention provides a kind of change based on the initial polarity of traveling wave of electric current
Station cable outlet fault monitoring method, it can solve the problem that the difficult problem of current fault line selection for indirectly grounding power system, effectively realizes
Substation cable outlet and its failure line selection of distribution line.
The present invention solves its technical problem and is adopted the technical scheme that: the transformer station's electricity based on the initial polarity of traveling wave of electric current
Cable outlet fault monitoring method, is characterized in that, arranges current transformer, described electric current in every outlet circuit of transformer station
Transformer is all connected with electric current initial travelling wave analysis device, the method comprising the steps of:
Set up substation cable outlet fault simulation model: transformer station is set up according to substation cable outlet and distribution network model
Cable outlet fault simulation model, described substation cable outlet fault simulation model includes transformator, in the outlet of transformator
Side is connected with three outlet circuits, all comprises cable run and overhead transmission line, described cable run one end in every outlet circuit
It is connected with transformator, the other end is connected with overhead transmission line one end, the other end of overhead transmission line is hanging, in every outlet circuit all
It is provided with simulated line fault；
Obtain the initial traveling wave of electric current: the three-phase current of every outlet circuit is obtained using current transformer, thus by electricity
Flow the initial traveling wave of electric current that initial travelling wave analysis device obtains every outlet circuit, the sample frequency of described current transformer is more than
1mhz；
To electric current, initial traveling wave is analyzed, and determines faulty line: the initial traveling wave of electric current obtaining is analyzed,
Contrast the initial traveling wave of three-phase current of same outlet circuit, if the initial polarity of traveling wave of every outlet circuit three-phase current is consistent,
Then may determine that the outlet circuit contrary with other two outlet line polarities is faulty line；If every outlet circuit
The initial polarity of traveling wave of three-phase current is incomplete same, the different circuit of the initial polarity of traveling wave of wherein one three-phase current of selection, really
The fixed phase line different from addition biphase polarity is fault phase, then contrasts the fault phase of every outlet circuit again, with other two
The contrary outlet circuit of outlet line polarity is faulty line.
In said method, carry out setting up substation cable outlet phantom using pscad simulation software.
In said method, using matlab simulation software, to electric current, initial traveling wave is analyzed.
In said method, described outlet circuit adopts three-core structure, and the metal screen layer both-end of cable run is directly grounded
Mode, and the end of overhead transmission line is hanging.
In said method, the circuit event that in every outlet circuit, the line fault of setting is arranged with other two outlet circuits
Barrier is different.
In said method, described line fault includes cable major insulation fault, cable run and overhead transmission line junction gold
Attribute earth fault and overhead transmission line metallic earthing fault.
In said method, the process of setting up of described substation cable outlet fault simulation model comprises the following steps:
The selection of simulation modeling instrument data analytical tool: simulation modeling instrument selects the pscad of 4.2.0 version, number
Select the matlab of 7.1 versions according to analytical tool；
Set up substation cable outlet fault simulation model and emulation module: described substation cable outlet fault simulation mould
Type includes transformator, is connected with three outlet circuits in the outgoing line side of transformator, all comprises cable run in every outlet circuit
And overhead transmission line, described cable run one end is connected with transformator, and the other end is connected with overhead transmission line one end, overhead transmission line another
One end is hanging, is provided with simulated line fault in every outlet circuit；Described emulation module includes cable run module, frame
Empty line module, short trouble and FCM fault control module, cable major insulation fault and aerial line fault setup module；
Simulation parameter is arranged: the setting of pscad simulation parameter, cable data, overhead transmission line parameter and failed controller are joined
Number is configured；
Generate substation cable outlet fault simulation model: the foundation according to emulation module generates transformer station with parameter setting
Cable outlet fault simulation model.
The invention has the beneficial effects as follows: the present invention may determine that, according to singlephase earth fault, the phase that is out of order, using each circuit
The initial polarity of traveling wave of electric current, to realize the single-phase earth fault line selection of small current neutral grounding system, can not only realize substation cable
Outlet and the route selection of distribution line, and consider diverse location occur singlephase earth fault when electric current initial row wave property not
With the polarity using the initial traveling wave of phase current each after system single-phase earth fault contrasts, and solves current small current neutral grounding system
The difficult problem of route selection, the method is reliable and economical.
Brief description
The present invention is further described below in conjunction with the accompanying drawings:
Fig. 1 is method of the present invention flow chart；
Fig. 2 is the schematic diagram of substation cable outlet fault simulation model of the present invention；
Fig. 3 is the schematic diagram of cable run emulation module of the present invention；
Fig. 4 is the schematic diagram of overhead transmission line emulation module of the present invention；
Fig. 5 is the electric current initial traveling wave figure of the circuit 1 when there is singlephase earth fault at f1 in Fig. 2 of the present invention；
Fig. 6 is the electric current initial traveling wave figure of the circuit 2 when there is singlephase earth fault at f1 in Fig. 2 of the present invention；
Fig. 7 is the electric current initial traveling wave figure of the circuit 3 when there is singlephase earth fault at f1 in Fig. 2 of the present invention；
Fig. 8 is the electric current initial traveling wave figure of the circuit 1 when there is singlephase earth fault at f2 in Fig. 2 of the present invention；
Fig. 9 is the electric current initial traveling wave figure of the circuit 1 when there is singlephase earth fault at f2 in Fig. 2 of the present invention；
Figure 10 is the electric current initial traveling wave figure of the circuit 1 when there is singlephase earth fault at f2 in Fig. 2 of the present invention；
Figure 11 is the electric current initial traveling wave figure of the circuit 1 when there is singlephase earth fault at f3 in Fig. 2 of the present invention；
Figure 12 is the electric current initial traveling wave figure of the circuit 2 when there is singlephase earth fault at f3 in Fig. 2 of the present invention；
Figure 13 is the electric current initial traveling wave figure of the circuit 3 when there is singlephase earth fault at f3 in Fig. 2 of the present invention.
Specific embodiment
For the technical characterstic of this programme can be clearly described, below by specific embodiment, and combine its accompanying drawing, to this
Bright it is described in detail.Present invention omits to the description of known assemblies and treatment technology and process to avoid being unnecessarily limiting
The present invention.
A kind of substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current of the present invention, the method is real
Current transformer is set before applying first in every outlet circuit of transformer station, described current transformer all with electric current initial row
Wavelength-division analysis apparatus are connected.
As shown in figure 1, should be included based on the substation cable outlet fault monitoring method method of the initial polarity of traveling wave of electric current
Following steps:
Set up substation cable outlet fault simulation model: pscad is adopted according to substation cable outlet and distribution network model
Simulation software sets up substation cable outlet fault simulation model, and described substation cable outlet fault simulation model includes transformation
Device, is connected with three outlet circuits in the outgoing line side of transformator, all comprises cable run and overhead transmission line in every outlet circuit,
Described cable run one end is connected with transformator, and the other end is connected with overhead transmission line one end, and the other end of overhead transmission line is hanging,
It is provided with simulated line fault in every outlet circuit；
Obtain the initial traveling wave of electric current: the three-phase current of every outlet circuit is obtained using current transformer, thus by electricity
Flow the initial traveling wave of electric current that initial travelling wave analysis device obtains every outlet circuit, the sample frequency of described current transformer is more than
1mhz；
To electric current, initial traveling wave is analyzed, and determines faulty line: using matlab simulation software at the beginning of the electric current obtaining
The ripple that begins is analyzed, and contrasts the initial traveling wave of three-phase current of same outlet circuit, if every outlet circuit three-phase electricity
Flow initial polarity of traveling wave unanimously, then may determine that the outlet circuit contrary with other two outlet line polarities is fault wire
Road；If the initial polarity of traveling wave of the three-phase current of every outlet circuit is incomplete same, choose wherein one three-phase current initial
The different circuit of polarity of traveling wave, determines that the phase lines different from addition biphase polarity are fault phase, then contrasts every outlet line again
The fault phase on road, the outlet circuit contrary with other two outlet line polarities is faulty line.
The substation cable outlet fault simulation model that the present invention adopts specifically to set up process as follows:
First, the selection of simulation modeling instrument data analytical tool
Mainly there are emtp, pscad and matlab in the simulation software being used for transient analysis in power system.
Emtp (electro-magnetic transient program) electromagnetic transient state procedure voltage in power system
Extensively apply in the electric analog of grade.It is based on trapezoidal integration rule, by the use of associated model as dynamic element, selects node
Method sets up equation, utilizes sparse matrix and lu factorization during solution algebraic equation.Integration step is specified by user, and whole
Keep constant in individual simulation process.Emtp comprises distributed constant transmission line of electricity and the cable model of frequency dependence, but its setting is relatively
For loaded down with trivial details, parameter is difficult to obtain.
Pscad is a power system simulation instrument based on figure.It is powerful, carries model library and has
Friendly human-computer interaction interface, can significantly increase the efficiency of electromagnetic transient in power system simulation study.By modeling bag, make
User can set up, with the method for figure, the electric power system model that will be simulated studying.Determine that the traveling wave model of cable needs to make
Use cable module, unifrequency pattern model or completely frequency dependence traveling wave model can be produced by function selecting, its
In, the radius of each conductive layer and insulating barrier and characteristic are all necessary.
Matlab is the abbreviation of matrix laboratory (matrix labotstory), is for the exploitation of algorithm, data visualization
The senior computational language change, analyzed and calculate and interactive environment, main inclusion matlab and simulink two large divisions.Its
Simulink partly in Power blockset (power system blockset), can be used for building of complicated electric power system
Mould, and carry out Transient calculation；Wavelet analysises workbox (wavelet toolbox) is applied to the analysis of signal, denoising, compression etc.
[43-44].
There is no suitable respective cable model in the Power blockset of matlab, after considering, this modeling is imitative
, as simulation modeling instrument, matlab7.1 is as data processing toolses for true selection pscad4.2.0.
2nd, substation cable outlet fault simulation model and emulation module are set up
As shown in Fig. 2 substation cable outlet fault simulation model of the present invention includes transformator, going out in transformator
Line side is connected with three outlet circuits: circuit 1, circuit 2 and circuit 3, all comprises cable run and make somebody a mere figurehead in every outlet circuit
Circuit, described cable run one end is connected with transformator, and the other end is connected with overhead transmission line one end, and the other end of overhead transmission line hangs
Sky, is provided with simulated line fault in every outlet circuit.Because 10kv cable is three-core structure mostly, thus commonly used
Metal screen layer two ends direct grounding way.Cable in phantom adopts three-core structure, and metal screen layer both-end is direct
The mode of ground connection, and line end is hanging.Being provided with different faults at three: f1 in phantom is the event of cable major insulation
Barrier, f2 is cable and aerial line junction metallic earthing fault, and f3 is aerial line metallic earthing fault.Line length parameter
It is provided that the long 130m of cable of circuit 1, the long 6km of overhead transmission line；The long 3.05km of cable of circuit 2, the long 7km of overhead transmission line；Line
The long 100m of cable on road 3, the long 10km of overhead transmission line.
Described emulation module includes cable run module, overhead transmission line module, short trouble and FCM fault control module, cable
Major insulation fault and aerial line fault setup module.
(1) cable run module: have the equivalent model of three kinds of transmission lines of electricity or cable in pscad: pi type equivalent circuit,
Bergeron model and frequency dependent character model.Under circuit is in fundamental frequency, pi type equivalent circuit and bergeron model are sufficient
Enough uses, are a difference in that, bergeron model replaces the lc element in pi type equivalence circuit, resistance with distributed constant mode
Deng being all lumped parameter.The parameter of all frequency dependences considered by frequency dependent character circuit model, and this model can occur on circuit
The transient state travelling wave process of broad frequency band scope carries out accurate description.This problem will to major insulation fault when carry out transient state travelling wave survey
Away from fault transient travelling wave frequency band wider (general tens megahertzs Dao up to a hundred megahertzs), therefore, from frequency dependent character circuit mould
Type.10kv cables simulation model as shown in figure 3, wherein c1-c3 represents the conductor core wire of cable, i.e. a, b, c three-phase, s1-s3 table
Show the metal screen layer of cable, due to not containing three-core cable model in pscad, thus electric without the single of armor using three-phase
Cable, is established the model of three-core cable, and is met the characteristic of three-core cable by simulating, verifying by arranging its relative position.
(2) overhead transmission line module: in pscad simulated environment, overhead transmission line model equally adopts frequency dependent character, overhead transmission line
Phantom is as shown in figure 4, tline represents shaft tower.
(3) short trouble and FCM fault control module: when cable run is short-circuited fault, the electric current at fault will be fast
Speed increases, and the very little that the resistance of trouble point becomes, now can be using short trouble model in software pscad.Fault moment with
Trouble duration can be set by failed controller and control.
(4) cable major insulation fault and aerial line fault setup module: the power cable insulation fault of foundation and aerial line
Fault simulation model, the length of length or aerial line by changing two sections of cables changes position of failure point.Wherein, cable mould
The direction of type mains side measurement end conductor current is to flow to fault point by mains side；In metal sheath, the sense of current is by fault
Grounded line flow direction the earth at point；Directly there is single phase metal earth fault in built on stilts line model.
3rd, simulation parameter setting
(1) the simulation parameter setting of pscad: panel is arranged by the simulation parameter of pscad software, can be to during emulation
Between, sampling step length, data output step-length and data deposit etc. and to be configured.Setting simulation time is 0.07s, and sampling step length is
0.5us, data output step-length is 1us.
(2) setting of cable data: due to the model without three-core cable in pscad, therefore the spy according to three-core cable
Property establishes the phantom of three-core cable, and is carried out to score using the operation characteristic of this model and actual three-core cable
Analysis, verifies that this model is feasible.The parameters such as the title of cable run, steady statue frequency and cable length can pass through cable
Parameter setting panel is configured.
(3) overhead transmission line parameter setting: the parameter such as the title of overhead transmission line, steady statue frequency and length can be led to
Cross overhead transmission line parameter setting panel to be configured.
(4) setting of failed controller parameter: fault moment and trouble duration, can pass through failed controller parameter
Arranged on setting panel, wherein, fault moment is 0.032s, and trouble duration is 40ms.
4th, generate substation cable outlet fault simulation model
Foundation according to above local module and parameter setting carry out overall substation cable outlet fault simulation model and build
Vertical, and by " save channels to disk in pscad simulation parameter setting panel？" option is set to " yes ", be easy to by
Emulation data derives, and carries out data processing using matlab.
The acquisition process of the initial traveling wave of electric current of the present invention is as follows: obtains each bar using the current transformer realizing setting
The three-phase current of outlet circuit, thus obtain the electric current initial row of every outlet circuit by electric current initial travelling wave analysis device
Ripple, due to containing cable and overhead transmission line in system, for can fully be analyzed to current temporary state characteristic, sample frequency needs
More than 1mhz.
Concrete analysis process to the initial traveling wave of electric current of the present invention is as follows:
First, cable major insulation fault
When singlephase earth fault occurs at f1, that is, there is cable major insulation fault, circuit 1, circuit 2 and circuit 3 three
The electric current initial traveling wave figure of bar circuit is respectively as shown in Fig. 5, Fig. 6 and Fig. 7.
Failure line selection process now is as follows: (1) relative analyses three-line is with the initial polarity of traveling wave of circuit three-phase current
Not quite identical；(2) the initial polarity of traveling wave of circuit 1 three-phase current is different, therefore access line 1 analysis fault phase, due to b phase polarity
Contrary with a, c phase, determine that b phase is fault phase；(3) the contrast initial polarity of traveling wave of three-line b phase current understand circuit 1 with addition
The initial traveling wave opposite polarity of two lines road electric current, it is thus determined that circuit 1 is faulty line.
2nd, cable and overhead transmission line junction fault
When singlephase earth fault occurs at f2, that is, there is cable and overhead transmission line junction fault, circuit 1, circuit 2
With the electric current initial traveling wave figure of circuit 3 three-line respectively as shown in Fig. 8, Fig. 9 and Figure 10.
Failure line selection process now is as follows: (1) relative analyses three-line is with the initial polarity of traveling wave of circuit three-phase current
Completely the same；(2) the initial polarity of traveling wave of circuit 3 three-phase current and circuit 1,2 three-phase currents initial traveling wave opposite polarity, therefore really
Alignment road 3 is faulty line.
3rd, overhead transmission line fault
When singlephase earth fault occurs at f3, that is, there is overhead transmission line fault, circuit 1, circuit 2 and 3 three, circuit
The electric current initial traveling wave figure of circuit is respectively as shown in Figure 11, Figure 12 and Figure 13.
Failure line selection process now is as follows: (1) relative analyses three-line is with the initial polarity of traveling wave of circuit three-phase current
Not quite identical；(2) the initial polarity of traveling wave of circuit 1 three-phase current is different, therefore access line 1 analysis fault phase, due to b phase polarity
Contrary with a, c phase, determine that b phase is fault phase；(3) the contrast initial polarity of traveling wave of three-line b phase current understand circuit 2 with addition
The initial traveling wave opposite polarity of two lines road electric current, it is thus determined that circuit 2 is faulty line.
Because during system diverse location generation singlephase earth fault, transient characteristic is incomplete same, the present invention considers system
There is the impact to route selection for the singlephase earth fault in diverse location, more science, accurately；The present invention does not need to increase zero-sequence current
Transformer, can accurately be judged merely with three-phase current, have certain economy.The present invention can not only be selected
Line, most of singlephase earth faults may determine that the phase that is out of order, and electricity when considering diverse location generation singlephase earth fault
The difference of stream initial row wave property, more existing selection method more science, reliability, economy.
The above is the preferred embodiment of the present invention, for those skilled in the art,
Without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also regarded as this
Bright protection domain.
Claims (7)
1. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current, is characterized in that, every in transformer station
Current transformer is set in bar outlet circuit, and described current transformer is all connected with electric current initial travelling wave analysis device, institute
The method of stating comprises the following steps:
Set up substation cable outlet fault simulation model: substation cable is set up according to substation cable outlet and distribution network model
Outlet fault simulation model, described substation cable outlet fault simulation model includes transformator, connects in the outgoing line side of transformator
It is connected to three outlet circuits, in every outlet circuit, all comprise cable run and overhead transmission line, described cable run one end and change
Depressor is connected, and the other end is connected with overhead transmission line one end, and the other end of overhead transmission line is hanging, is respectively provided with every outlet circuit
There is simulated line fault；
Obtain the initial traveling wave of electric current: the three-phase current of every outlet circuit is obtained using current transformer, thus by the beginning of electric current
The wavelength-division analysis apparatus that begin obtain the initial traveling wave of electric current of every outlet circuit, and the sample frequency of described current transformer is more than
1mhz；
To electric current, initial traveling wave is analyzed, and determines faulty line: the initial traveling wave of electric current obtaining is analyzed, contrast
The initial traveling wave of three-phase current of same outlet circuit, if the initial polarity of traveling wave of every outlet circuit three-phase current is consistent, can
To judge the outlet circuit contrary with other two outlet line polarities as faulty line；If the three-phase of every outlet circuit
The initial polarity of traveling wave of electric current is incomplete same, chooses the different circuit of the initial polarity of traveling wave of wherein one three-phase current, determine with
In addition the different phase line of biphase polarity is fault phase, then contrasts the fault phase of every outlet circuit again, with other two outlets
Line fault mutually opposite polarity outlet circuit is faulty line.
2. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current according to claim 1, its
Feature is to carry out setting up substation cable outlet phantom using pscad simulation software.
3. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current according to claim 1, its
Feature is that to electric current, initial traveling wave is analyzed using matlab simulation software.
4. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current according to claim 1, its
Feature is that described outlet circuit adopts three-core structure, the directly grounded mode of metal screen layer both-end of cable run, and frame
The end on ceases to be busy road is hanging.
5. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current according to claim 1, its
Feature is that in every outlet circuit, the line fault of setting is different from the line fault of other two outlet circuits settings.
6. the substation cable outlet fault monitoring method based on the initial polarity of traveling wave of electric current according to claim 1, its
Feature is that described line fault includes cable major insulation fault, cable run and overhead transmission line junction metallic earthing fault
With overhead transmission line metallic earthing fault.
7. the substation cable outlet fault prison based on the initial polarity of traveling wave of electric current according to any one of claim 1 to 6
Survey method, is characterized in that, the process of setting up of described substation cable outlet fault simulation model comprises the following steps:
The selection of simulation modeling instrument data analytical tool: simulation modeling instrument selects the pscad of 4.2.0 version, data is divided
Analysis instrument selects the matlab of 7.1 versions；
Set up substation cable outlet fault simulation model and emulation module: described substation cable outlet fault simulation model bag
Include transformator, be connected with three outlet circuits in the outgoing line side of transformator, in every outlet circuit, all comprise cable run and frame
Ceases to be busy road, described cable run one end is connected with transformator, and the other end is connected with overhead transmission line one end, the other end of overhead transmission line
Vacantly, every outlet circuit is provided with simulated line fault；Described emulation module includes cable run module, aerial line
Road module, short trouble and FCM fault control module, cable major insulation fault and aerial line fault setup module；
Simulation parameter is arranged: pscad simulation parameter, cable data, overhead transmission line parameter and failed controller parameter are set
Put；
Generate substation cable outlet fault simulation model: the foundation according to emulation module generates substation cable with parameter setting
Outlet fault simulation model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601846.0A CN104360226B (en) | 2014-10-31 | 2014-10-31 | Method for monitoring fault of cable outgoing lines of transformer substation on basis of current initial traveling wave polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410601846.0A CN104360226B (en) | 2014-10-31 | 2014-10-31 | Method for monitoring fault of cable outgoing lines of transformer substation on basis of current initial traveling wave polarity |
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| CN105116294A (en) * | 2015-09-18 | 2015-12-02 | 国家电网公司 | Traveling wave polarity measure based power distribution network cable fault monitoring method |
| CN105372559B (en) * | 2015-12-16 | 2019-04-12 | 昆明理工大学 | A kind of limited continuation method of chain type transmission line of electricity one-end fault ranging |
| WO2017218558A1 (en) * | 2016-06-14 | 2017-12-21 | Schweitzer Engineering Laboratories, Inc. | Phase selection for traveling wave fault detection systems |
| CN107884683A (en) * | 2017-12-28 | 2018-04-06 | 国网山东省电力公司高密市供电公司 | The initial traveling wave detection means of electric current and transformer station's outlet cable fault monitoring method |
| CN108490312B (en) * | 2018-03-27 | 2019-10-25 | 中国矿业大学 | Section localization method is grounded based on the polar distribution of secondary transient state increment current amplitude |
| CN111007427B (en) | 2019-11-23 | 2021-05-04 | 清华大学 | Distribution line single-phase earth fault line selection method and computer readable storage medium |
| CN112684273B (en) * | 2021-01-06 | 2023-08-29 | 国核电力规划设计研究院重庆有限公司 | Grounding current diversion method for grounding short-circuit fault of 110kV full-cable outlet transformer substation |
| CN113608071B (en) * | 2021-08-16 | 2024-05-14 | 国网重庆市电力公司黔江供电分公司 | Method for establishing distribution network line fault analysis model |
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