CN109470991A - A kind of line fault of electrical power system recognition methods and system - Google Patents
A kind of line fault of electrical power system recognition methods and system Download PDFInfo
- Publication number
- CN109470991A CN109470991A CN201811266569.7A CN201811266569A CN109470991A CN 109470991 A CN109470991 A CN 109470991A CN 201811266569 A CN201811266569 A CN 201811266569A CN 109470991 A CN109470991 A CN 109470991A
- Authority
- CN
- China
- Prior art keywords
- phase
- current
- transient current
- phase transient
- identified
- 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
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001052 transient effect Effects 0.000 claims abstract description 179
- 230000004888 barrier function Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
-
- 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 line fault of electrical power system recognition methods and system, and method includes the three-phase transient current for obtaining electric system route to be identified；Fault identification is carried out to electric system route to be identified according to the three-phase transient current of electric system route to be identified；Wherein, short-circuit fault of power system identification is realized using instantaneous current value criterion, transient current slope criterion and two-phase transient current difference criterion in recognition methods, solve the problems, such as in the prior art individually it is larger using transient current slope criterion influence from harmonic, using the low problem of transient current slope and instantaneous current value criterion recognition speed；And the method application that the application proposes is simple, is convenient for engineering construction.
Description
Technical field
The invention belongs to electric power system faults to identify field, and in particular to a kind of line fault of electrical power system recognition methods and
System.
Background technique
As modern power systems continue to develop, the short circuit current level in power grids at different levels constantly increases, once it is more than disconnected
Road device rupturing capacity, consequence are hardly imaginable.Short circuit current excessive problem can be effectively solved using fault current limiter, it is special
Point is that zero impedance or Low ESR are presented when power grid operates normally, and is hardly had an impact to system, and in system jam
Shi Chengxian high impedance, short circuit current is limited under predetermined value.Quickly inhibit short to give full play to fault current limiter
The characteristic of road electric current needs quickly to identify line short fault.
After short trouble occurs, for limiting short-circuit current, need to put into fault current limit in the shortest possible time
Device processed, so short trouble fast recognition technology is most important to the realization of fault current limiter function.According to electric system event
Service requirement after barrier, when singlephase earth fault occurs, the movement of faulted phase current limiter, non-faulting phase current limiter is not
Movement；When multiphase failure occurs for route, the movement of three-phase current limiter.Therefore, the technological difficulties that fault-signal quickly identifies
Be accurately need to quickly judge whether line fault occurs, and certain mutually whether be single-phase fault non-faulting phase.In the prior art
Using current slope criterion, recognition speed is very fast, but since current slope influence from harmonic is larger, by current slope
Identification is matched with current instantaneous value, i.e., when certain phase current slope and current instantaneous value reach setting valve, judges route
Break down and think that the non-faulting phase of the Xiang Buwei single-phase fault, such method reduce recognition speed.To improve route event
Hinder the rapidity and reliability of identification, it is necessary to further study it.
Summary of the invention
A kind of line fault of electrical power system recognition methods provided by the invention and system, it is therefore an objective in conjunction with circuit on power system
Instantaneous current value criterion, transient current slope criterion and two-phase transient current difference criterion realize circuit on power system short trouble
Identification.
To achieve the above object, the invention adopts the following technical scheme:
The present invention provides a kind of line fault of electrical power system recognition methods, it is improved in that the described method includes:
Obtain the three-phase transient current of electric system route to be identified；
Failure is carried out to electric system route to be identified according to the three-phase transient current of electric system route to be identified
Identification.
Preferably, the three-phase transient current according to electric system route to be identified is to electric system line to be identified
Road carries out fault identification, comprising:
If a phase transient current is greater than Fisrt fault identification preset value and described current in current time three-phase transient current
A phase transient current meets the first criterion in moment three-phase transient current, then judges line failure to be identified；
If it is pre- to be greater than the second fault identification for the corresponding current slope of a phase transient current in current time three-phase transient current
If a phase transient current meets the first criterion in value and the current time three-phase transient current, then judge that route to be identified occurs
Failure；
Wherein, the line failure to be identified include this mutually occur two-phase in single-phase fault or three-phase break down or
Three-phase breaks down.
Further, first criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous of current time t
A phase transient current in a electric system power frequency period T three-phase transient current；i2(t)It is another in current time t three-phase transient current
A phase transient current in outer two-phase；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t
In addition a phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
Further, the Fisrt fault identification preset value is the maximum that the circuit on power system carries busy hour
Load current；
The second fault identification preset value is that the circuit on power system carries busy hour maximum load current pair
The current slope answered.
Further, the third fault identification preset value is the maximum value in first threshold and second threshold；
Wherein, the first threshold is circuit on power system carrying peak load, and when route generation single-phase fault,
In addition the difference of two-phase current time transient current difference and the previous electric system power frequency period transient current difference at current time
Maximum value；
When the second threshold is breaker actuation outside the circuit on power system, any two in route three-phase transient current
The maximum of the difference of phase current time transient current difference and the previous electric system power frequency period transient current difference at current time
Value.
The present invention also provides a kind of line fault of electrical power system identifying systems, it is improved in that the system comprises:
Transient current obtains module, for obtaining the three-phase transient current of electric system route to be identified；
Fault identification module, for being waited for according to the three-phase transient current of electric system route to be identified electric system
Identify that route carries out fault identification.
Preferably, the fault identification module includes:
Fisrt fault recognition unit, if being greater than Fisrt fault for a phase transient current in current time three-phase transient current
Identify that a phase transient current meets the first criterion in preset value and the current time three-phase transient current, then judges line to be identified
It breaks down on road；
Second fault identification unit, if oblique for the corresponding electric current of a phase transient current in current time three-phase transient current
Rate is greater than a phase transient current in the second fault identification preset value and the current time three-phase transient current and meets the first criterion,
Then judge line failure to be identified；
Wherein, the line failure to be identified include this mutually occur two-phase in single-phase fault or three-phase break down or
Three-phase breaks down.
Further, first criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous of current time t
A phase transient current in a electric system power frequency period T three-phase transient current；i2(t)It is another in current time t three-phase transient current
A phase transient current in outer two-phase；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t
In addition a phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
Further, the Fisrt fault identification preset value is the maximum that the circuit on power system carries busy hour
Load current；
The second fault identification preset value is that the circuit on power system carries busy hour maximum load current pair
The current slope answered.
Further, the third fault identification preset value is the maximum value in first threshold and second threshold；
Wherein, the first threshold is circuit on power system carrying peak load, and when route generation single-phase fault,
In addition the difference of two-phase current time transient current difference and the previous electric system power frequency period transient current difference at current time
Maximum value；
When the second threshold is breaker actuation outside the circuit on power system, any two in route three-phase transient current
The maximum of the difference of phase current time transient current difference and the previous electric system power frequency period transient current difference at current time
Value.
It is compared with the immediate prior art, the technical scheme provide by that invention has the following excellent effect:
The present invention provides a kind of line fault of electrical power system recognition methods and system, by using instantaneous current value criterion,
Transient current slope criterion and two-phase transient current difference criterion realize short-circuit fault of power system identification, solve in the prior art
The problem that transient current slope criterion influence from harmonic is larger, transient current slope and instantaneous current value criterion recognition speed are low,
And the present processes application is simple, is convenient for engineering construction.
Detailed description of the invention
Fig. 1 is electric power system fault recognition methods flow chart of the present invention；
Fig. 2 is electric power system fault identifying system structural schematic diagram of the present invention.
Specific embodiment
Below with reference to embodiment, the invention will be described in further detail.
The present invention provides a kind of line fault of electrical power system recognition methods as shown in Figure 1, which comprises
Step 1, the three-phase transient current for obtaining electric system route to be identified；
Step 2, according to the three-phase transient current of electric system route to be identified to electric system route to be identified into
Row fault identification.
In the method described in step 2 according to the three-phase transient current of electric system route to be identified to electric system
Route to be identified carries out fault identification, comprising:
If a phase transient current is greater than Fisrt fault identification preset value and described current in current time three-phase transient current
A phase transient current meets the first criterion in moment three-phase transient current, then judges line failure to be identified；
If it is pre- to be greater than the second fault identification for the corresponding current slope of a phase transient current in current time three-phase transient current
If a phase transient current meets the first criterion in value and the preceding moment three-phase transient current, then judge that event occurs for route to be identified
Barrier；
Wherein, the line failure to be identified include this mutually occur two-phase in single-phase fault or three-phase break down or
Three-phase breaks down.
Wherein, first criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous of current time t
A phase transient current in a electric system power frequency period T three-phase transient current；i2(t)It is another in current time t three-phase transient current
A phase transient current in outer two-phase；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t
In addition a phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
In 2 specific method of above-mentioned steps, the Fisrt fault identification preset value, the second fault identification preset value and third event
Barrier identification preset value is arranged according to the historical data of electric system route to be identified, specifically:
The Fisrt fault identification preset value is the maximum load current that the circuit on power system carries busy hour；
The second fault identification preset value is that the circuit on power system carries the corresponding electric current of busy hour maximum load current
Slope；The third fault identification preset value is the maximum value in first threshold and second threshold；Wherein, the first threshold is
The circuit on power system carries peak load, and when route generation single-phase fault, in addition two-phase current time transient current is poor
With the maximum value of the difference of the previous electric system power frequency period transient current difference at current time；The second threshold is described
When the outer breaker actuation of circuit on power system, any two-phase current time transient current difference and current in route three-phase transient current
The maximum value of the difference of the previous electric system power frequency period transient current difference at moment.
The present invention also provides a kind of line fault of electrical power system identifying system as shown in Figure 2, the system comprises:
Transient current obtains module, for obtaining the three-phase transient current of electric system route to be identified；
Fault identification module, for being waited for according to the three-phase transient current of electric system route to be identified electric system
Identify that route carries out fault identification.
Fault identification module in the system includes:
Fisrt fault recognition unit, if being greater than Fisrt fault for a phase transient current in current time three-phase transient current
Identify that a phase transient current meets the first criterion in preset value and the current time three-phase transient current, then judges line to be identified
It breaks down on road；
Second fault identification unit, if oblique for the corresponding electric current of a phase transient current in current time three-phase transient current
Rate is greater than a phase transient current in the second fault identification preset value and the preceding moment three-phase transient current and meets the first criterion, then
Judge line failure to be identified；
Wherein, the line failure to be identified include this mutually occur two-phase in single-phase fault or three-phase break down or
Three-phase breaks down.
First criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous of current time t
A phase transient current in a electric system power frequency period T three-phase transient current；i2(t)It is another in current time t three-phase transient current
A phase transient current in outer two-phase；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t
In addition a phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
Fisrt fault identification preset value, the second fault identification preset value and third event in above-mentioned fault identification unit
Barrier identification preset value is arranged according to the historical data of electric system route to be identified, specifically:
The Fisrt fault identification preset value is the maximum load current that the circuit on power system carries busy hour；
The second fault identification preset value is that the circuit on power system carries the corresponding electric current of busy hour maximum load current
Slope；The third fault identification preset value is the maximum value in first threshold and second threshold；Wherein, the first threshold is
The circuit on power system carries peak load, and when route generation single-phase fault, in addition two-phase current time transient current is poor
With the maximum value of the difference of the previous electric system power frequency period transient current difference at current time；The second threshold is described
When the outer breaker actuation of circuit on power system, any two-phase current time transient current difference and current in route three-phase transient current
The maximum value of the difference of the previous electric system power frequency period transient current difference at moment.
In conclusion the present invention provides a kind of line fault of electrical power system recognition methods and system, method includes obtaining electricity
The three-phase transient current of Force system route to be identified；According to the three-phase transient current of electric system route to be identified to electric power
System route to be identified carries out fault identification；Wherein, instantaneous current value criterion, transient current slope criterion are used in recognition methods
Short-circuit fault of power system identification is realized with two-phase transient current difference criterion, is solved in the prior art individually using transient current
The larger problem of slope criterion influence from harmonic is asked using transient current slope and instantaneous current value criterion recognition speed are low
Topic；And the method application that the application proposes is simple, is convenient for engineering construction.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, institute
The those of ordinary skill in category field is although should be understood with reference to the above embodiments: still can be to a specific embodiment of the invention
It is modified or replaced equivalently, these are without departing from any modification of spirit and scope of the invention or equivalent replacement, in Shen
Within claims of the invention that please be pending.
Claims (10)
1. a kind of line fault of electrical power system recognition methods, which is characterized in that the described method includes:
Obtain the three-phase transient current of electric system route to be identified；
Fault identification is carried out to electric system route to be identified according to the three-phase transient current of electric system route to be identified.
2. the method as described in claim 1, which is characterized in that the three-phase wink according to electric system route to be identified
When electric current to electric system route to be identified carry out fault identification, comprising:
If a phase transient current is greater than Fisrt fault identification preset value and the current time in current time three-phase transient current
A phase transient current meets the first criterion in three-phase transient current, then judges line failure to be identified；
If the corresponding current slope of a phase transient current is greater than the second fault identification preset value in current time three-phase transient current
And a phase transient current meets the first criterion in the current time three-phase transient current, then judges that event occurs for route to be identified
Barrier；
Wherein, the line failure to be identified includes that this mutually occurs two-phase in single-phase fault or three-phase and breaks down or three-phase
Break down.
3. method according to claim 2, which is characterized in that first criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous electricity of current time t
A phase transient current in Force system power frequency period T three-phase transient current；i2(t)It is in current time t three-phase transient current other two
Xiang Zhongyi phase transient current；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t in addition
A phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
4. method according to claim 2, which is characterized in that the Fisrt fault identification preset value is the electric system line
The maximum load current of road carrying busy hour；
The second fault identification preset value is that circuit on power system carrying busy hour maximum load current is corresponding
Current slope.
5. method as claimed in claim 3, which is characterized in that the third fault identification preset value is first threshold and second
Maximum value in threshold value；
Wherein, the first threshold is circuit on power system carrying peak load, and when route generation single-phase fault, in addition
The difference of two-phase current time transient current difference and the previous electric system power frequency period transient current difference at current time is most
Big value；
When the second threshold is breaker actuation outside the circuit on power system, any two quite in route three-phase transient current
The maximum value of the difference of preceding moment transient current difference and the previous electric system power frequency period transient current difference at current time.
6. a kind of line fault of electrical power system identifying system, which is characterized in that the system comprises:
Transient current obtains module, for obtaining the three-phase transient current of electric system route to be identified；
Fault identification module, it is to be identified to electric system for the three-phase transient current according to electric system route to be identified
Route carries out fault identification.
7. system as claimed in claim 6, which is characterized in that the fault identification module includes:
Fisrt fault recognition unit, if being identified for a phase transient current in current time three-phase transient current greater than Fisrt fault
A phase transient current meets the first criterion in preset value and the current time three-phase transient current, then judges route hair to be identified
Raw failure；
Second fault identification unit, if big for the corresponding current slope of a phase transient current in current time three-phase transient current
A phase transient current meets the first criterion in the second fault identification preset value and the current time three-phase transient current, then sentences
Break line failure to be identified；
Wherein, the line failure to be identified includes that this mutually occurs two-phase in single-phase fault or three-phase and breaks down or three-phase
Break down.
8. system as claimed in claim 7, which is characterized in that first criterion are as follows:
In formula, i1(t)For a phase transient current in current time t three-phase transient current；i1(t-T)For the previous electricity of current time t
A phase transient current in Force system power frequency period T three-phase transient current；i2(t)It is in current time t three-phase transient current other two
Xiang Zhongyi phase transient current；i2(t-T)For in the previous electric system power frequency period T three-phase transient current of current time t in addition
A phase transient current in two-phase；i3(t)For another phase transient current in two-phase other in current time t three-phase transient current；
i3(t-T)It is instantaneously electric for another phase in two-phase other in the previous electric system power frequency period T three-phase transient current of current time t
Stream；Iset3For third fault identification preset value.
9. system as claimed in claim 7, which is characterized in that the Fisrt fault identification preset value is the electric system line
The maximum load current of road carrying busy hour；
The second fault identification preset value is that circuit on power system carrying busy hour maximum load current is corresponding
Current slope.
10. system as claimed in claim 8, which is characterized in that the third fault identification preset value is first threshold and the
Maximum value in two threshold values；
Wherein, the first threshold is circuit on power system carrying peak load, and when route generation single-phase fault, in addition
The difference of two-phase current time transient current difference and the previous electric system power frequency period transient current difference at current time is most
Big value；
When the second threshold is breaker actuation outside the circuit on power system, any two quite in route three-phase transient current
The maximum value of the difference of preceding moment transient current difference and the previous electric system power frequency period transient current difference at current time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811266569.7A CN109470991A (en) | 2018-10-29 | 2018-10-29 | A kind of line fault of electrical power system recognition methods and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811266569.7A CN109470991A (en) | 2018-10-29 | 2018-10-29 | A kind of line fault of electrical power system recognition methods and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109470991A true CN109470991A (en) | 2019-03-15 |
Family
ID=65666307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811266569.7A Pending CN109470991A (en) | 2018-10-29 | 2018-10-29 | A kind of line fault of electrical power system recognition methods and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109470991A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999677A (en) * | 2020-10-28 | 2020-11-27 | 江苏智臻能源科技有限公司 | Indoor and outdoor short circuit identification method based on meter box monitoring terminal and intelligent electric meter |
| CN112147536A (en) * | 2020-09-07 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Current-amount-based short-circuit fault rapid detection method |
| WO2022032492A1 (en) * | 2020-08-11 | 2022-02-17 | Abb Schweiz Ag | Method of determining line fault of power system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437582A (en) * | 2011-12-26 | 2012-05-02 | 中电普瑞科技有限公司 | Latent series compensation device |
| CN104267313A (en) * | 2014-09-25 | 2015-01-07 | 广东易事特电源股份有限公司 | Micro grid system feeder line fault type distinguishing and fault point positioning method |
| CN104319737A (en) * | 2014-10-30 | 2015-01-28 | 国网宁夏电力公司电力科学研究院 | Differential protection configuration method and device for sending transformer out of double-feed type wind field |
| JP2015115997A (en) * | 2013-12-10 | 2015-06-22 | 株式会社東芝 | Short circuit directional relay |
| CN105093054A (en) * | 2015-06-30 | 2015-11-25 | 许昌许继软件技术有限公司 | Method for fast diagnosing direction connection of big power rectifier switch tube online |
| CN107167709A (en) * | 2017-07-07 | 2017-09-15 | 吉林大学 | A kind of electric network fault localization method and alignment system |
| CN108521116A (en) * | 2018-03-07 | 2018-09-11 | 中国电力科学研究院有限公司 | A kind of method and system for transmission line of electricity longitudinal direction failure to be identified |
-
2018
- 2018-10-29 CN CN201811266569.7A patent/CN109470991A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102437582A (en) * | 2011-12-26 | 2012-05-02 | 中电普瑞科技有限公司 | Latent series compensation device |
| JP2015115997A (en) * | 2013-12-10 | 2015-06-22 | 株式会社東芝 | Short circuit directional relay |
| CN104267313A (en) * | 2014-09-25 | 2015-01-07 | 广东易事特电源股份有限公司 | Micro grid system feeder line fault type distinguishing and fault point positioning method |
| CN104319737A (en) * | 2014-10-30 | 2015-01-28 | 国网宁夏电力公司电力科学研究院 | Differential protection configuration method and device for sending transformer out of double-feed type wind field |
| CN105093054A (en) * | 2015-06-30 | 2015-11-25 | 许昌许继软件技术有限公司 | Method for fast diagnosing direction connection of big power rectifier switch tube online |
| CN107167709A (en) * | 2017-07-07 | 2017-09-15 | 吉林大学 | A kind of electric network fault localization method and alignment system |
| CN108521116A (en) * | 2018-03-07 | 2018-09-11 | 中国电力科学研究院有限公司 | A kind of method and system for transmission line of electricity longitudinal direction failure to be identified |
Non-Patent Citations (1)
| Title |
|---|
| 金雪芬等;: "根据线路电流斜率快速识别故障信号的方法", 电网技术, vol. 33, no. 09, pages 29 - 34 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022032492A1 (en) * | 2020-08-11 | 2022-02-17 | Abb Schweiz Ag | Method of determining line fault of power system |
| CN112147536A (en) * | 2020-09-07 | 2020-12-29 | 广东电网有限责任公司广州供电局 | Current-amount-based short-circuit fault rapid detection method |
| CN111999677A (en) * | 2020-10-28 | 2020-11-27 | 江苏智臻能源科技有限公司 | Indoor and outdoor short circuit identification method based on meter box monitoring terminal and intelligent electric meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3267460B1 (en) | Direct-current interruption device | |
| Jahn et al. | Survey of methods for selective DC fault detection in MTDC grids | |
| EP3306766B2 (en) | Direct current power transmission system, central server of same, and method for restoring direct current power transmission pathway after failure | |
| Mokhberdoran et al. | A review on HVDC circuit breakers | |
| US8803358B2 (en) | HVDC switchyard and an HVDC switchyard system | |
| Hajian et al. | Evaluation of semiconductor based methods for fault isolation on high voltage DC grids | |
| RU2592640C2 (en) | Linear dc voltage protective automatic device | |
| CN108226708B (en) | Quick fault discrimination method for multi-terminal direct-current power grid containing MMC | |
| US20130229739A1 (en) | Voltage balancing of symmetric hvdc monopole transmission lines after earth faults | |
| EP3363092B1 (en) | Method and arrangement for facilitating clearing of a pole fault and isolation of a faulted pole in a power transmission system | |
| CN109470991A (en) | A kind of line fault of electrical power system recognition methods and system | |
| Li et al. | Dc fault protection of multi-terminal VSC-HVDC system with hybrid dc circuit breaker | |
| Karthikeyan et al. | Simulation and analysis of faults in high voltage DC (HVDC) power transmission | |
| US20160156175A1 (en) | Current-limiting reactor apparatus | |
| CN111987706B (en) | Current-limiting type controllable lightning arrester, current converter, power transmission system and control method | |
| US9762051B2 (en) | Current-limiting and power-flow control device | |
| Visakh et al. | Protection of HVDC grids against temporary and permanent faults | |
| Leterme et al. | Fast breaker failure backup protection for HVDC grids | |
| CN105490244A (en) | Z source direct-current circuit breaker | |
| CN106159987B (en) | A kind of method of DC grid topology and the fast quick-recovery of fault isolation system | |
| CN110165641B (en) | Superposition method of direct current circuit breaker in flexible direct current transmission system | |
| Panasetsky et al. | On the problem of shunt reactor tripping during single-and three-phase auto-reclosing | |
| CN109038595B (en) | Low-capacity/low-impedance flexible switching system and control method thereof | |
| CN112147536A (en) | Current-amount-based short-circuit fault rapid detection method | |
| CN204614686U (en) | Electrical apparatus-switching device |
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 |