CN110514950A - A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing - Google Patents
A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing Download PDFInfo
- Publication number
- CN110514950A CN110514950A CN201910970371.5A CN201910970371A CN110514950A CN 110514950 A CN110514950 A CN 110514950A CN 201910970371 A CN201910970371 A CN 201910970371A CN 110514950 A CN110514950 A CN 110514950A
- Authority
- CN
- China
- Prior art keywords
- route
- zero
- frequency
- sequence current
- value
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Locating Faults (AREA)
Abstract
The present invention provides a kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing, the residual voltage U0 of real-time monitoring power distribution network, and whether the residual voltage for judging that system occurs is greater than 0.15 times of bus voltage rating UN；If more than the zero-sequence current data of first 1/4 power frequency period after starting line selection apparatus record failure；The zero-sequence current data of each route of acquisition is subjected to frequency disribution processing；The data obtained according to frequency disribution calculate the frequency disribution value of each route, select faulty line according to frequency disribution value.Present invention application frequency disribution theory carries out failure line selection, directly utilizes the original recorded data of zero-sequence current, calculation amount is smaller, and improves the speed of route selection.The corresponding route of present invention minimum frequency disribution value is faulty line, and failure criterion is simple, can accurately and efficiently select faulty line.
Description
Technical field
The present invention relates to electric power system fault route selection technical fields, and in particular to a kind of neutral by arc extinction coil grounding electricity
Net fault line selection method for single-phase-to-ground fault, equipment and readable storage medium storing program for executing.
Background technique
For a long time, experts and scholars both domestic and external have done in-depth study to fault line selection method for single-phase-to-ground fault.Main side
Method have the selection method based on steady-state quantity, the selection method based on transient, using modern signal processing technology selection method,
All there is respective route selection limitation in S injection method, these selection methods.
Based on the selection method of steady-state quantity since ground fault feature is faint, steady-state component is too small, it is easy to wrong choosing occur.
Based on the selection method of transient since the characteristic quantity after failure is difficult to accurately sufficiently extract, needs large amount of complex
Fault data processing is influenced by fault type and failure generation moment, is simultaneously paid no attention to vulnerable to factors, actual application effects such as interference
Think.
Using the selection method of modern signal processing technology, route selection precision can be theoretically significantly improved, but is needed multiple
Miscellaneous data processing, there are also to be tested for actual effect.
S injection method breaches traditional route selection theory, and failure line selection, such method are carried out by the way of active Injection Signal
Equipment need to additionally be increased, when grounding resistance is too high, Injection Signal is fainter, it is difficult to detect, can not accurately select failure
Route.
Summary of the invention
In order to overcome the deficiencies in the prior art described above, the present invention provides a kind of neutral by arc extinction coil grounding power grid list
Phase ground fault line selecting method, method include:
Step 1, whether the residual voltage U0 of real-time monitoring power distribution network, the residual voltage for judging that system occurs are greater than 0.15 times
Bus voltage rating UN；
Step 2, if more than the zero-sequence current data of first 1/4 power frequency period after starting line selection apparatus record failure, if not
It is greater than, return step 1；
Step 3, the zero-sequence current data of each route of acquisition is subjected to frequency disribution processing；
Step 4, the data obtained according to frequency disribution calculate the frequency disribution value of each route, according to frequency disribution value
Select faulty line.
Setting for neutral by arc extinction coil grounding electric network single-phase earth fault selection method is realized the present invention also provides a kind of
It is standby, comprising:
Memory, for storing computer program and neutral by arc extinction coil grounding electric network single-phase earth fault route selection side
Method；
Processor, for executing the computer program and the choosing of neutral by arc extinction coil grounding electric network single-phase earth fault
Line method, the step of to realize neutral by arc extinction coil grounding electric network single-phase earth fault selection method.
What the present invention also provides a kind of with neutral by arc extinction coil grounding electric network single-phase earth fault selection method can
Storage medium is read, computer program is stored on readable storage medium storing program for executing, the computer program is executed by processor in realize
The step of property point is through arc suppression coil earthing electric network fault line selection method for single-phase-to-ground fault.
As can be seen from the above technical solutions, the invention has the following advantages that
Present invention application frequency disribution theory carries out failure line selection, directly utilizes the original recorded data of zero-sequence current, meter
Calculation amount is smaller, and improves the speed of route selection.The corresponding route of present invention minimum frequency disribution value is faulty line, failure criterion
Simply, faulty line can accurately and efficiently be selected.
The frequency disribution line chart of each route is demonstrated by the overall trend of data, can be easily determined faulty line.
Failure line selection is carried out according to the frequency disribution value that Bessel Formula calculates, the corresponding route of minimum frequency disribution value is fault wire
Road can determine faulty line very accurately.
Detailed description of the invention
In order to illustrate more clearly of technical solution of the present invention, attached drawing needed in description will be made below simple
Ground introduction, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill
For personnel, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is neutral by arc extinction coil grounding electric network single-phase earth fault selection method flow chart；
Fig. 2 is neutral by arc extinction coil grounding system single-phase earth fault current distributing figure；
Fig. 3 is neutral by arc extinction coil grounding electric network single-phase earth fault selection method embodiment flow chart.
Specific embodiment
Those of ordinary skill in the art may be aware that in conjunction with neutral by arc extinction coil grounding electric network single-phase earth fault
Each exemplary unit and algorithm steps of embodiment description disclosed in selection method, can be soft with electronic hardware, computer
The combination of part or the two is realized, in order to clearly illustrate the interchangeability of hardware and software, has been pressed in the above description
Each exemplary composition and step are generally described according to function.These functions are implemented in hardware or software actually,
Specific application and design constraint depending on technical solution.Professional technician can use each specific application
Distinct methods realize described function, but such implementation should not be considered as beyond the scope of the present invention.
Block diagram shown in the drawings is only functional entity, not necessarily must be corresponding with physically separate entity.
I.e., it is possible to realize these functional entitys using software form, or realized in one or more hardware modules or integrated circuit
These functional entitys, or these functional entitys are realized in heterogeneous networks and/or processor device and/or microcontroller device.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to provide and fully understand to the embodiment of the present invention.However,
It will be appreciated by persons skilled in the art that technical solution of the present invention can be practiced without one or more in specific detail,
Or it can be using other methods, constituent element, device, step etc..In other cases, it is not shown in detail or describes known side
Method, device, realization or operation are to avoid fuzzy each aspect of the present invention.
The present invention provides a kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, as shown in Figure 1,
Method includes:
Step 1, whether the residual voltage U0 of real-time monitoring power distribution network, the residual voltage for judging that system occurs are greater than 0.15 times
Bus voltage rating UN；
Step 2, if more than the zero-sequence current data of first 1/4 power frequency period after starting line selection apparatus record failure, if not
It is greater than, return step 1；
Step 3, the zero-sequence current data of each route of acquisition is subjected to frequency disribution processing；
Step 31, determine group away from range away from the zero-sequence current minimum value principle for being less than each route according to group；
In group away from a class value optional in range, and the zero-sequence current using frequency disribution theory directly to each route
Data carry out frequency disribution, find out the group number of zero-sequence current data；
The frequency disribution of each route zero-sequence current data carries out visual representation with histogram in step 31, will be in histogram
Each rectangular midpoint for indicating frequency is connected in turn, and forms line chart；Event is picked out according to frequency disribution line chart
The frequency disribution trend of barrier route is clearly distinguishable from non-fault line.
Step 32, it calculates and falls into each group away from the zero-sequence current data number in range, i.e. frequency.
Step 4, the data obtained according to frequency disribution calculate the frequency disribution value of each route, according to frequency disribution value
Select faulty line.
Step 41, the group number and frequency of each route zero-sequence current obtained according to frequency disribution, utilize Bessel Formula
Calculate the frequency disribution value of each route；
Step 42, the frequency disribution value of more each route, the corresponding route of minimum frequency disribution value are faulty line.
In the present invention, the zero-sequence current data of first 1/4 power frequency period after record failure occurs, and utilize zero-sequence current
Original recorded data, do not need to extract zero-sequence current data, decompose, integrate etc. complicated data processing again.
Group is away from the basis to carry out frequency disribution to each route zero-sequence current data.Group by following formula away from being determined, group is away from being less than
The minimum value of all route zero-sequence currents:
In formula:
I0.i is the zero-sequence current virtual value on i-th line road；
For phase voltage virtual value；
C0i is the single-phase distribution capacity over the ground on i-th line road；
ω is power frequency angular frequency.
Frequency disribution value characterizes the dispersion degree of each route overall data distribution；
Frequency disribution value is determined by following formula:
In formula:
N is the group number of zero-sequence current data；
Xi is the zero-sequence current data number of i-th group of number, i.e. frequency；
X is that zero-sequence current data is evenly distributed in the number in each group of number.
In this way, existing fault-line selecting method, is substantially all the processing for needing that data are carried out with large amount of complex, the present invention is logical
Step 1-4 is crossed, the data processing for carrying out large amount of complex to the zero-sequence current data that sampling obtains is avoided, takes full advantage of failure
The original waveform information recorded afterwards directly carries out frequency disribution processing to fault data, finally according to calculated value route selection.
The frequency disribution line chart of method provided by the invention, each route is demonstrated by the overall trend of data, can be very
It is easy to determine faulty line.Failure line selection, minimum frequency disribution value pair are carried out according to the frequency disribution value that Bessel Formula calculates
The route answered is faulty line, can determine faulty line very accurately.
In the following, route selection verifying is carried out under different faults situation, if not for the correctness of comprehensive verification the method for the present invention
With failure initial phase angle, different ground fault resistance value, different faults point position, it is also contemplated that noise jamming, sample frequency etc. because
Influence of the element to route selection.
Shown in 3, the neutral by arc extinction coil grounding system for establishing cable mixing using MATLAB is single-phase to be connect
The busbar voltage of earth fault simulation model, the power distribution network is 10.5kV, draws 6 routes (L1, L2, L3, L4, L5, L6).Route
Length is successively are as follows: route L1, overhead transmission line 10km；Route L2, cable run 2km, overhead transmission line 4km；Route L3, cable run
3km, overhead transmission line 6km；Route L4, overhead transmission line 10km, cable run 2km；Route L5, overhead transmission line 5km, cable run
3km；Route L6, cable run 8km.Overhead transmission line parameter is as follows: positive sequence resistance is 0.175 Ω/km, zero sequence resistance 0.284
Ω/km；Positive sequence inductance is 1.212mH/km, zero sequence inductance 4.236mH/km；Positive sequence capacitor is 0.001 μ F/km, zero sequence capacitor
0.006μF/km.Cable-line parameter is as follows: positive sequence resistance is 0.075 Ω/km, and zero sequence resistance is 0.102 Ω/km；Positive sequence electricity
Sense is 0.254mH/km, zero sequence inductance 0.892mH/km；Positive sequence capacitor is 0.318 μ F/km, 0.212 μ F/km of zero sequence capacitor.It adopts
Sample frequency is selected as 10kHz, i.e., each 200 points of periodic sampling, simulation time is set as 0.3s, time of failure 0.04s.
1. the simulating, verifying under different faults operating condition
Group takes the data of 1/4 power frequency period after failure away from 0.1A is uniformly selected as, and carries out the emulation point under different faults operating condition
Analysis.As space is limited, the simulation result of several groups of different faults conditions is only listed, as shown in table 1.Wherein, θ is failure initial phase angle, Rf
For ground resistance, Xm is fault point to bus distance.
Route selection result under 1 different faults operating condition of table
Above-mentioned simulation result show when route occur ground fault when, even the emulation of different faults operating condition show it is small
The frequency disribution value of the degradation failure condition of the big grounding resistance of fault close angle, faulty line is minimum always, accordingly can be reliable
Select faulty line.The a large amount of emulation data generated under different faults situation with simulation model, to one kind proposed by the present invention
Fault line selection method for single-phase-to-ground fault based on frequency disribution theory carries out simulating, verifying, can obtain this selection method in different faults shape
Faulty line can be accurately selected under condition.
2. the Adaptability Analysis of selection method
Above-mentioned emulation shows that the selection method based on frequency disribution theory is feasible.Further to verify route selection side
The adaptability of method, it is also contemplated that influence of the factors such as noise jamming, sample frequency to route selection.
(1) influence of the noise to route selection
Noise jamming can produce bigger effect the accuracy of route selection, therefore be added in the emulation of different faults operating condition
The white Gaussian noise of 30dB, the results are shown in Table 2.Simulation result shows in the case where having noise jamming that this selection method can be direct
Faulty line is selected according to the minimum frequency disribution value of zero-sequence current, illustrates that frequency disribution selection method is suitable for having noise jamming
The case where.
The route selection result after white Gaussian noise is added in table 2
(2) influence of the data window length to route selection
Route L3 is 2km apart from bus Xm, and θ is 15 °, and Rf is 450 Ω, chooses different data window length and is emulated,
Wherein T is 1 power frequency period, the results are shown in Table 3.It is obtained by table 3, under same fault operating condition different data window length, faulty line
Frequency disribution value it is minimum always, showing data window length not influences route selection result
Route selection result under 3 different data window of table
(3) influence of the sample frequency to route selection
Sample frequency determines sampled data, therefore need to verify whether different sample frequencys have an impact to route selection.If route L5
Ground fault occurs, Xm 5km, θ are 15 °, and Rf is 850 Ω.The simulating, verifying of selection method is carried out under different sample frequencys,
It the results are shown in Table 4.It can be obtained by table 4, the frequency disribution value of faulty line is minimum always under different sample frequencys, and then shows sampling frequency
Rate does not influence route selection.
Route selection result under the different sample frequencys of table 4
(4) influence of the compensativity to route selection
The compensativity size of neutral by arc extinction coil grounding system determines the zero-sequence current value of route, therefore need to verify
Can the selection method that proposed under different compensativities accurately select faulty line.Route L6 is set, ground fault occurs, Xm is
5km, θ are 45 °, and Rf is 500 Ω.Based on above-mentioned fault condition, the simulating, verifying of selection method, knot are carried out under different compensativities
Fruit is listed in table 5.It can be obtained by table 5, the frequency disribution value of faulty line is minimum always under different compensativities, shows compensativity to route selection
Accuracy without influence.
Route selection result under the different compensativities of table 5
(5) influence of the asynchronous sampling to route selection
After ground fault occurs, line selection apparatus is likely to be out of synchronization the sampling of each route, it is thus possible to which mistake selects faulty line.
So can preferably solve the problems, such as asynchronous sampling for the selection method that verifying proposes, lagged in route L3, L4, L5, L6
In the case that the sampling number of route L1, L2 are respectively 6,6,10,10, simulation analysis is carried out to selection method.If route L6 is sent out
Raw ground fault, Xm 2km, Rf are 500 Ω, the results are shown in Table 6.It can be obtained by table 6, the selection method based on frequency disribution is suitable for
The case where asynchronous sampling.
Route selection result in the case of 6 asynchronous sampling of table
(6) group is away from the influence to route selection
If ground fault occurs for route L6, Xm 5km, θ are 15 °, and Rf is 800 Ω.Route selection is carried out under different class values
As a result the simulating, verifying of method is listed in table 7.It is obtained by table 7, under different class values, the frequency disribution value of faulty line L6 is obvious
Less than All other routes, can accurately select faulty line accordingly, illustrate class value to the selection method based on frequency disribution theory without
It influences.
Route selection result of the different groups of table 7 away under
Using singlephase earth fault zero-sequence current data occurs for the method for the present invention, avoids the characteristic quantities such as steady-state quantity, transient
Complex extraction process, to reduce calculation amount.At the time of only positioning failure being needed to occur and the data of 1/4 power frequency period
It can determine that faulty line.It is power grid by the simulating, verifying feasibility of this selection method under various faults operating condition
Quickly and reliably failure line selection, which is carried out, when single-phase earthing provides a kind of new method.
Neutral by arc extinction coil grounding electric network single-phase earth fault selection method based on frequency disribution theory has following
Several features: taking full advantage of the primary fault information after failure occurs, and does not need the processing that data are carried out with large amount of complex,
It ensure that the simplicity of selection method；The frequency disribution value of route is defined, is that main foundation judges failure with frequency disribution value
Route, the corresponding route of minimum frequency disribution value is faulty line, ensure that the reliability of selection method；Route selection result not by
The influence of position of failure point, failure initial phase angle, fault point ground resistance ensure that the accuracy of selection method；This selection method
At the time of only positioning failure being needed to occur, route selection then is carried out using the zero-sequence current data of 1/4 power frequency period first after failure,
Route selection speed is improved, ensure that the rapidity of selection method.
A kind of method of neutral by arc extinction coil grounding electric network single-phase earth fault route selection proposed by the present invention, Ke Yijian
It is single, reliable, accurately and rapidly select faulty line, guarantee the safe and stable operation of neutral by arc extinction coil grounding power distribution network,
And it is easy to Project Realization.
Based on the above method, the present invention also provides a kind of realization neutral by arc extinction coil grounding electric network single-phase earth faults
The equipment of selection method, comprising:
Memory, for storing computer program and neutral by arc extinction coil grounding electric network single-phase earth fault route selection side
Method；Processor, for executing the computer program and neutral by arc extinction coil grounding electric network single-phase earth fault route selection side
Method, the step of to realize neutral by arc extinction coil grounding electric network single-phase earth fault selection method.
Based on the above method, the present invention also provides one kind to have neutral by arc extinction coil grounding electric network single-phase earth fault
The readable storage medium storing program for executing of selection method is stored with computer program on readable storage medium storing program for executing, and the computer program is by processor
The step of executing to realize neutral by arc extinction coil grounding electric network single-phase earth fault selection method.
The equipment of neutral by arc extinction coil grounding electric network single-phase earth fault selection method is in conjunction with disclosed herein
Embodiment description each exemplary unit and algorithm steps, can be with the combination of electronic hardware, computer software or the two
It realizes, in order to clearly illustrate the interchangeability of hardware and software, is generally retouched according to function in the above description
Each exemplary composition and step are stated.These functions are implemented in hardware or software actually, depending on technical solution
Specific application and design constraint.Professional technician can to each specific application come using distinct methods to realize
The function of description, but such implementation should not be considered as beyond the scope of the present invention.
Through the above description of the embodiments, those skilled in the art is it can be readily appreciated that neutral point described herein passes through
The equipment of arc suppression coil earthing electric network fault line selection method for single-phase-to-ground fault can also be combined by software realization by software
The mode of necessary hardware is realized.Therefore, according to neutral by arc extinction coil grounding electric network single-phase earth fault selection method
The technical solution of disclosed embodiment can be embodied in the form of software products, which can store non-at one
In volatile storage medium (can be CD-ROM, USB flash disk, mobile hard disk etc.) or on network, including some instructions are so that one
Equipment (can be personal computer, server, mobile terminal or network equipment etc.) is calculated to execute according to disclosure embodiment party
The indexing means of formula.
Person of ordinary skill in the field is it is understood that neutral by arc extinction coil grounding electric network single-phase earth fault selects
The various aspects of line method can be implemented as system, method or program product.Therefore, various aspects of the disclosure can be specifically real
It is now following form, it may be assumed that complete hardware embodiment, complete Software Implementation (including firmware, microcode etc.), or it is hard
The embodiment that part and software aspects combine, may be collectively referred to as circuit, " module " or " system " here.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, which is characterized in that method includes:
Step 1, whether the residual voltage U0 of real-time monitoring power distribution network, the residual voltage for judging that system occurs are greater than 0.15 times of bus
Voltage rating UN；
Step 2, if more than the zero-sequence current data of first 1/4 power frequency period after starting line selection apparatus record failure, if less
In return step 1；
Step 3, the zero-sequence current data of each route of acquisition is subjected to frequency disribution processing；
Step 4, the data obtained according to frequency disribution calculate the frequency disribution value of each route, select according to frequency disribution value
Faulty line.
2. the method according to claim 1, wherein
The step 3 further include:
Step 31, determine group away from range away from the zero-sequence current minimum value principle for being less than each route according to group；
In group away from a class value optional in range, and the zero-sequence current data using frequency disribution theory directly to each route
Frequency disribution is carried out, the group number of zero-sequence current data is found out；
Step 32, it calculates and falls into each group away from the zero-sequence current data number in range, i.e. frequency.
3. according to the method described in claim 2, it is characterized in that,
The frequency disribution of each route zero-sequence current data carries out visual representation with histogram in step 31, will be each in histogram
It indicates that the rectangular midpoint of frequency is connected in turn, forms line chart；Fault wire is picked out according to frequency disribution line chart
The frequency disribution trend on road is clearly distinguishable from non-fault line.
4. the method according to claim 1, wherein
The step 4 further include:
Step 41, the group number and frequency of each route zero-sequence current obtained according to frequency disribution, are calculated using Bessel Formula
The frequency disribution value of each route；
Step 42, the frequency disribution value of more each route, the corresponding route of minimum frequency disribution value are faulty line.
5. the method according to claim 1, wherein
Method further include: the zero-sequence current data of first 1/4 power frequency period after record failure occurs, and utilize zero-sequence current
Original recorded data does not need the complicated data processing such as to extract zero-sequence current data, decompose, integrate again.
6. the method according to claim 1, wherein
Group is away from the basis to carry out frequency disribution to each route zero-sequence current data.
7. according to the method described in claim 6, it is characterized in that,
Group by following formula away from being determined, group is away from the minimum value for being less than all route zero-sequence currents:
In formula:
I0.i is the zero-sequence current virtual value on i-th line road；
For phase voltage virtual value；
C0i is the single-phase distribution capacity over the ground on i-th line road；
ω is power frequency angular frequency.
8. the method according to claim 1, wherein
Frequency disribution value characterizes the dispersion degree of each route overall data distribution；
Frequency disribution value is determined by following formula:
In formula:
N is the group number of zero-sequence current data；
Xi is the zero-sequence current data number of i-th group of number, i.e. frequency；
X is that zero-sequence current data is evenly distributed in the number in each group of number.
9. a kind of equipment for realizing neutral by arc extinction coil grounding electric network single-phase earth fault selection method, which is characterized in that
Include:
Memory, for storing computer program and neutral by arc extinction coil grounding electric network single-phase earth fault selection method；
Processor, for executing the computer program and neutral by arc extinction coil grounding electric network single-phase earth fault route selection side
Method, to realize the neutral by arc extinction coil grounding electric network single-phase earth fault route selection side as described in claim 1 to 8 any one
The step of method.
10. a kind of readable storage medium storing program for executing with neutral by arc extinction coil grounding electric network single-phase earth fault selection method,
It is characterized in that, computer program is stored on the readable storage medium storing program for executing, and the computer program is executed by processor to realize
As described in claim 1 to 8 any one the step of neutral by arc extinction coil grounding electric network single-phase earth fault selection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970371.5A CN110514950A (en) | 2019-10-13 | 2019-10-13 | A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910970371.5A CN110514950A (en) | 2019-10-13 | 2019-10-13 | A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110514950A true CN110514950A (en) | 2019-11-29 |
Family
ID=68633357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910970371.5A Pending CN110514950A (en) | 2019-10-13 | 2019-10-13 | A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110514950A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078920A (en) * | 2022-08-22 | 2022-09-20 | 国网江苏省电力有限公司南京供电分公司 | Multi-information fusion active power distribution network single-phase earth fault line selection method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335510A (en) * | 2001-06-01 | 2002-02-13 | 清华大学 | Fault-line selecting method and device for small-current earthing system |
| CN1696724A (en) * | 2005-05-09 | 2005-11-16 | 昆明理工大学 | Adaptive approach for route selection of grounded system connected to arc suppression coil |
| CN101368998A (en) * | 2008-10-15 | 2009-02-18 | 中国矿业大学 | Route selection method suitable for arc suppression coil earthing electric network |
| CN106443352A (en) * | 2016-10-27 | 2017-02-22 | 山东科技大学 | Method for single-phase earth fault line selection of neutral non-grounding power grid |
-
2019
- 2019-10-13 CN CN201910970371.5A patent/CN110514950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1335510A (en) * | 2001-06-01 | 2002-02-13 | 清华大学 | Fault-line selecting method and device for small-current earthing system |
| CN1696724A (en) * | 2005-05-09 | 2005-11-16 | 昆明理工大学 | Adaptive approach for route selection of grounded system connected to arc suppression coil |
| CN101368998A (en) * | 2008-10-15 | 2009-02-18 | 中国矿业大学 | Route selection method suitable for arc suppression coil earthing electric network |
| CN106443352A (en) * | 2016-10-27 | 2017-02-22 | 山东科技大学 | Method for single-phase earth fault line selection of neutral non-grounding power grid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115078920A (en) * | 2022-08-22 | 2022-09-20 | 国网江苏省电力有限公司南京供电分公司 | Multi-information fusion active power distribution network single-phase earth fault line selection method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | A fault location technique for two-terminal multisection compound transmission lines using synchronized phasor measurements | |
| Yu et al. | A new PMU-based fault location algorithm for series compensated lines | |
| Liu et al. | A Universal Fault Location Technique for N-Terminal $({N}\geqq 3) $ Transmission Lines | |
| CN109613399A (en) | A kind of line fault selection method based on VMD energy relative entropy | |
| Zadeh et al. | Implementation and testing of directional comparison bus protection based on IEC61850 process bus | |
| CN104237731B (en) | Single-phase earth fault line selection method on basis of EEMD (ensemble empirical mode decomposition) and energy method for resonance earthed power distribution network | |
| Gaur et al. | A new faulty section identification and fault localization technique for three-terminal transmission line | |
| CN107192883B (en) | A kind of resonant earthed system high resistance earthing fault transition resistance discrimination method | |
| CN109298287A (en) | Small current neutral grounding Distribution Network Failure kind identification method based on fault detector data | |
| CN109239524A (en) | A kind of low current method for locating single-phase ground fault based on three-phase current amplitude | |
| Taheri et al. | Single-end current-based algorithm for fault location in series capacitor compensated transmission lines | |
| CN104375056A (en) | Substation cable outgoing line fault monitoring method based on voltage and current initial row waves | |
| Cai et al. | A threshold free synchrophasor measurement based multi-terminal fault location algorithm | |
| CN109946561A (en) | A kind of current transformer polarity testing method, apparatus, equipment and storage medium | |
| CN111487505B (en) | Distribution line single-phase earth fault demarcation method, system, terminal and storage medium | |
| CN112485601A (en) | Fault analysis method and system based on double-end line electrical quantity information | |
| CN113406442B (en) | High-resistance grounding fault detection method and related device for small-resistance grounding system | |
| Peng et al. | Fault location on double–circuit transmission lines by phase correction of fault recorder signals without accurate time synchronization | |
| CN110514950A (en) | A kind of neutral by arc extinction coil grounding electric network single-phase earth fault selection method, equipment and readable storage medium storing program for executing | |
| CN116148599B (en) | Kurtosis and skewness coefficient-based high-resistance ground fault diagnosis protection method and device | |
| CN106443352B (en) | A kind of method of neutral point ungrounded electric network single-phase earth fault line selection | |
| Davall et al. | A software design for a computer based impedance relay for transmission line protection | |
| CN112363009B (en) | Single-ended fault location method and system for same-tower line ground fault | |
| Jiao et al. | An analytical approach to locate evolving faults on transmission lines based on sparse wide area measurements | |
| CN112649694B (en) | Method for judging single-phase grounding fault of low-current grounding system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191129 |