CN106207994A - Line protection method and device for time blind area - Google Patents
Line protection method and device for time blind area Download PDFInfo
- Publication number
- CN106207994A CN106207994A CN201610689436.5A CN201610689436A CN106207994A CN 106207994 A CN106207994 A CN 106207994A CN 201610689436 A CN201610689436 A CN 201610689436A CN 106207994 A CN106207994 A CN 106207994A
- Authority
- CN
- China
- Prior art keywords
- current
- data
- protection
- voltage
- participation
- 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 38
- 230000001681 protective effect Effects 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000009471 action Effects 0.000 claims abstract description 16
- 238000004364 calculation method Methods 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 26
- 230000002269 spontaneous effect Effects 0.000 abstract description 26
- 238000007689 inspection Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000006855 networking Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 3
- 230000008034 disappearance Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 241000272814 Anser sp. Species 0.000 description 1
- 101000760663 Hololena curta Mu-agatoxin-Hc1a Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- H02J13/0013—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to the line protection method for time blind area and device, method comprises the following steps that the step of the current data of other elements, circuit the bus differential protecting information from process-level network acquisition, bus；When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate the step of the phase place of this interval three-phase current, amplitude；Described calculate the phase place of this interval three-phase current, amplitude participation protective logical calculated, according to the step of result of calculation output protection action message.By utilizing that intelligent substation data are transmitting digitized, networking and the advantage of information sharing, in the time blind area of fortune inspection personnel's accident treatment, it is achieved data spontaneous recovery, eliminate defencive function and lack the trip risk of bypassing the immediate leadership brought.
Description
Technical field
Relay protection field of the present invention, a kind of line protection method for CT or PT broken string.
Background technology
At present, the constantly upgrading of China electric power network technique equipment, promote electrical network towards intensive, specialized, flattening and unmanned
The advanced management directions such as change are developed, and below 220kV transformer station has popularized unattended operation transformer station pattern in an all-round way, reduces change
Power station operating cost, improves on-road efficiency.In terms of equipment obstacle management, due to transformer station's unmanned, transport from dispatching terminal
Administrative staff finds substation equipment fault message, and to arranging fortune inspection personnel to go to transformer station to process, period will appear from equipment
The time blind area operated with failure.The length of time blind area, relevant with the time length that fortune inspection personnel go to transformer station.
As a example by intelligent substation 110kV route protection, according to traditional Principles of Relay Protection, when CT breaks, will close
Lock correlated current protection, when PT breaks, by locking direction protection and no longer carry out synchronous voltage judgement.
If 110kV circuit there occurs that CT broken string and PT break, in time blind area, due to electric current, voltage data disappearance
Will result in defencive function disappearance, tripping can be caused when line fault occurs, cause upper level trip protection, expand power failure face
Long-pending, reduce relay protection " four property ".
The application of IEC61850 standard, information realization between power transformation station equipment, between transformer station shares and mutual,
Utilize information sharing advantage that traditional protection algorithm and criterion, traditional protection scheme are improved and innovated, send out to greatest extent
Pick potentiality are to improve the performance of protection, it is to avoid the loss of data impact on protection, the data spontaneous recovery of research Multicriteria decision
Preservation tactics, promotes protection reliability level, to ensureing that power network safety operation is significant.Along with electrical network equipment system
Make the progress of technology and the introducing of ACT, limit protection and just fade away with the technical bottleneck controlling technological change,
Promote secondary system of intelligent substation structure and form all to there occurs revolutionary variation, provide condition for solving the problems referred to above.
Summary of the invention
It is an object of the invention to provide a kind of line protection method for time blind area, in order to solve in fortune inspection personnel's thing
Therefore the problem that in the time blind area processed, defencive function disappearance exists trip risk of bypassing the immediate leadership.
For achieving the above object, the solution of the present invention includes:
For the line protection method of time blind area, comprise the following steps that
The step of the current data of other elements, circuit from the bus differential protecting information, bus of process-level network acquisition
Suddenly；When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate this
Phase place, the step of amplitude every three-phase current；The phase place of this interval three-phase current that calculates described in utilization, amplitude participation protective
Logical calculated, according to the step of result of calculation output protection action message.
Further, further comprise the steps of: combining unit and be respectively connected to the protection voltage of voltage transformer and measure voltage,
During PT broken string, to measure voltage data participation protective logical calculated, according to result of calculation output protection action message.
Present invention also offers a kind of line protective devices for time blind area, including:
Other elements, the current data of circuit on the bus differential protecting information obtained from process-level network, bus
Module；When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate
The phase place of this interval three-phase current, the module of amplitude；The phase place of this interval three-phase current, the amplitude that calculate described in utilization participate in
Relay protective scheme calculates, according to the module of result of calculation output protection action message.
Further, also include module: combining unit is respectively connected to the protection voltage of voltage transformer and measures voltage,
During PT broken string, to measure voltage data participation protective logical calculated, according to result of calculation output protection action message.
By utilizing that intelligent substation data are transmitting digitized, networking and the advantage of information sharing, in fortune inspection personnel's thing
Therefore in the time blind area processed, completion data, it is achieved data spontaneous recovery, eliminate defencive function and lack the trip risk of bypassing the immediate leadership brought,
Grace time guarantee will be brought for accident treatment, improve stable operation level during substation equipment fault, and ensure and supply reliably
Electricity quality.
Accompanying drawing explanation
Fig. 1 is that intelligent substation 110kV circuit 1 protects annexation figure；
Fig. 2 is intelligent substation 110kV route protection schematic diagram.
Detailed description of the invention
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Embodiment of the method
Following example, illustrate as a example by 110kV circuit.It may be noted that the method for the present invention is not limited to 110kV
The transmission line of electricity of this specific voltage grade, it is also possible to for the transmission line of electricity of other electric pressures.
In Fig. 1,110kV bus includes 4 elements: 110kV circuit 1, element 2, element 3, element 4.110kV circuit 1 is protected
Protection unit is directly connected to intelligent terminal by light mouth 1, according to GOOSE standard implementation input and output energy supply；By light mouth 2 and conjunction
And unit light mouth 2 is directly connected to, according to IEC 61850-9-2 standard acquisition current-voltage information；By light mouth 3 and 110kV line
Road 1 process layer switch is connected.110kV circuit 1 combining unit is connected with 110kV circuit 1 process layer switch by light mouth 1.
Element is 2-in-1 and unit, element 3 combining unit, element 4 combining unit are respectively connected to the process layer exchange of respective element
Machine.110kV voltage combining unit is respectively connected to protect voltage and measure voltage.
110kV bus protection, 110kV voltage combining unit, 110kV circuit 1 process layer switch, element 2～element 4 mistake
Journey layer switch all accesses 110kV center switch, forms 110kV process-level network.
The basic ideas of the present invention are, in time blind area, it is ensured that defencive function can continue to, maintain and arrive to maintainer
Come, in the case of CT or PT breaks, it is impossible to latch-up protection, it is therefore necessary to completion related data.Rely on process-level network, from mistake
Other elements, the current data of circuit on the bus differential protecting information of journey layer network acquisition, bus；When judging that CT breaks,
Each element according to participation bus differential current computing is 0 with line current vector, calculates the phase place of this interval three-phase current, width
The step of value；The phase place of this interval three-phase current, the amplitude that calculate described in and will substitute this interval circuit before CT broken string
Current data, participation protective logical calculated.
In like manner, breaking for PT, combining unit is respectively connected to the protection voltage of voltage transformer and measures voltage, breaks at PT
During line, to measure the protective current data before voltage data replacement PT broken string, participation protective logical calculated.
In introduction below, when being broken by CT or PT, Supplementing Data is referred to as data spontaneous recovery.
Concrete, control logic chart given below.As in figure 2 it is shown, occur that CT or PT broken string is with 110kV route protection
Example illustrates.
110kV circuit 1 is protected and is obtained 110kV bus protection, 110kV voltage combining unit, element 2 by process-level network
～the data of element 4 combining unit, it is provided that to CT broken string data spontaneous recovery module and PT broken string data spontaneous recovery module.
In Fig. 2, intelligent substation 110kV track data self-healing function is calculated mould by relay protective scheme computing module, master data
Block, CT broken string data spontaneous recovery module and PT broken string data spontaneous recovery module complete, jointly including herein below:
(1) during CT broken string, current data spontaneous recovery implementation method.CT broken string data spontaneous recovery module gathers 110kV circuit 1 electric current
I1, utilize process-level network acquisition elements 2 electric current I2, element 3 electric current I3, element 4 electric current I4, obtain 110kV bus protection letter
Breath.If 110kV circuit 1 electric current A phase breaks, 110kV bus protection ought the poorest and little continuous 7s of spill current break definite value more than CT
I.e. being judged to CT broken string, send out A phase disconnection signal, locking 110kV bus A phase differential protection, not locking 110kV bus B, C phase is differential
Protection.Now, if differential protection stalling current reaches working value, or busbar voltage is reduced to working value, illustrates on bus at CT
There may be fault while broken string, CT breakage lock device function suspends 10 seconds, erroneous judgement CT breakage lock device during to avoid bus-bar fault
Protection.To sum up, when 110kV circuit 1 electric current A phase breaks, if 110kV bus protection action=0, i.e. 110kV bus fault-free
In the case of, according to Kirchhoff's law, 110kV bus differential electric current is 0A:
Wherein, IdFor 110kV circuit 1 electric current I1, element 2 electric current I2, element 3 electric current I3, element 4 electric current I4Vector；For each element protection electric current, n=4.
According toUtilize the current data of 110kV other element of bus got, convert in real time
The phase place of 110kV circuit 1 three-phase current, amplitude.To point to bus as positive direction, it is assumed that 110kV bus current input element: unit
Part 2,110kV bus current output element: 110kV circuit 1, element 3, element 4.With the 110kV circuit 1 electric current A phase amplitude that converts
As a example by (two sub-values), if I2=10A, I3=2A, I4=4A, then I1=I2-I3-I4=4A.
When 110kV circuit 1CT broken string=1, CT broken string data spontaneous recovery module takes CT broken string action positive logic, open calculating
Electric current is to relay protective scheme computing module；Master data processing module takes CT broken string action antilogical, and latching current exports patrols to protection
Collect computing module.Therefore, relay protective scheme computing module obtains voltage data by master data computing module, is broken data by CT
Spontaneous recovery module obtains current data, and now, 110kV route protection is fully functional, it is to avoid the impact on protective value of the CT broken string.
In described above, CT broken string is dependent on what the difference of 110kV three-phase protective electric current determined.In prior art
Also having other the method that CT breaks that judges, such as, utilize zero sequence and negative-sequence current etc., these methods also serve as other embodiment party
Formula is applied to the solution of the present invention.
(2) during PT broken string, voltage data spontaneous recovery implementation method.PT broken string data spontaneous recovery module gathers 110kV and protects voltage
With measurement voltage dual redundant data, voltage is measured in output.When PT broken string=1, it is dynamic that PT broken string data spontaneous recovery module takes PT broken string
Making positive logic, open voltage of measuring is to relay protective scheme computing module；Master data processing module takes PT broken string action antilogical, locking
Voltage exports to relay protective scheme computing module.Therefore, relay protective scheme computing module obtains electric current number by master data computing module
According to, obtained by PT broken string data spontaneous recovery module and measure voltage data, now, 110kV route protection is fully functional, it is to avoid PT
The broken string impact on protective value.
(3) when CT broken string and PT broken string action simultaneously, current and voltage data spontaneous recovery implementation method.Now, master data processes
Module takes CT broken string action antilogical, PT broken string action antilogical, and latching current, voltage export to relay protective scheme computing module.
CT broken string data spontaneous recovery module and PT broken string data spontaneous recovery module are open, are specifically shown in content (1) and (2).Relay protective scheme calculates mould
Block obtains current and voltage data, 110kV route protection merit by CT broken string data spontaneous recovery module and PT broken string data spontaneous recovery module
Can be complete, it is to avoid CT, PT broken string impact on protective value.
(4) CT breaks and PT broken string is failure to actuate simultaneously, and now, locking CT broken string data spontaneous recovery module and PT broken string data are certainly
More module output, relay protective scheme computing module obtains current and voltage data by master data processing module.
To sum up, in this embodiment, it is characteristic of the invention that a kind of data self-cure type 110kV route protection realization side of proposition
Method, utilizes that intelligent substation data are transmitting digitized, networking and the advantage of information sharing, breaks 110kV route protection CT
Many criteria data spontaneous recovery decision-making when breaking with PT is optimized lifting, by CT broken string data spontaneous recovery module and PT broken string data
Spontaneous recovery module realizes the data spontaneous recovery of 110kV route protection current/voltage, it is to avoid the shortage of data impact on protective value, carries
The high safety and reliability of intelligent substation 110kV route protection.
In above example, system busbar includes circuit 1 and some elements, as other embodiments, is also applied for
More circuit and the situation of element.
Device embodiment
Present invention also offers a kind of line protective devices for time blind area, including:
Other elements, the current data of circuit on the bus differential protecting information obtained from process-level network, bus
Module；When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate
The phase place of this interval three-phase current, the module of amplitude；Described calculate the phase place of this interval three-phase current, amplitude participation protective
Logical calculated, according to the module of result of calculation output protection action message.
Further, also include module: combining unit is respectively connected to the protection voltage of voltage transformer and measures voltage,
During PT broken string, to measure voltage data participation protective logical calculated, according to result of calculation output protection action message.
The device of indication of the present invention, is actually based on a kind of computer solution of said method flow process, a kind of soft
Part component, above-mentioned module is the treatment progress corresponding with method flow.This software can run in protection equipment.Due to
Introduction sufficiently clear to said method is complete, and a kind of software sharing of the device that the present embodiment is claimed,
Therefore be described the most in detail.
It is presented above the detailed description of the invention that the present invention relates to, but the present invention is not limited to described embodiment.
Under the thinking that the present invention provides, use the mode being readily apparent that to those skilled in the art to the skill in above-described embodiment
Art means carry out converting, replace, revise, and the effect played is essentially identical with the relevant art means in the present invention, realize
Goal of the invention the most essentially identical, so formed technical scheme above-described embodiment is finely adjusted formation, this technology
Scheme still falls within protection scope of the present invention.
Claims (4)
1. for the line protection method of time blind area, it is characterised in that comprise the following steps that
The step of the current data of other elements, circuit from the bus differential protecting information, bus of process-level network acquisition；
When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate this
Phase place, the step of amplitude every three-phase current；
The phase place of this interval three-phase current that calculates described in utilization, amplitude participation protective logical calculated, defeated according to result of calculation
Go out the step of protection act information.
Line protection method for time blind area the most according to claim 1, it is characterised in that further comprise the steps of: conjunction
And unit is respectively connected to the protection voltage of voltage transformer and measures voltage, when PT breaks, to measure voltage data participation guarantor
Protect logical calculated, according to result of calculation output protection action message.
3. for the line protective devices of time blind area, it is characterised in that including:
The mould of the current data of other elements, circuit on the bus differential protecting information obtained from process-level network, bus
Block,
When judging that CT breaks, each element and line current vector according to participation bus differential current computing are 0, calculate this
Phase place, the module of amplitude every three-phase current；
The phase place of this interval three-phase current that calculates described in utilization, amplitude participation protective logical calculated, defeated according to result of calculation
Go out the module of protection act information.
Line protective devices for time blind area the most according to claim 3, it is characterised in that also include module: close
And unit is respectively connected to the protection voltage of voltage transformer and measures voltage, when PT breaks, to measure voltage data participation guarantor
Protect logical calculated, according to result of calculation output protection action message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689436.5A CN106207994A (en) | 2016-08-19 | 2016-08-19 | Line protection method and device for time blind area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610689436.5A CN106207994A (en) | 2016-08-19 | 2016-08-19 | Line protection method and device for time blind area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106207994A true CN106207994A (en) | 2016-12-07 |
Family
ID=57522545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610689436.5A Pending CN106207994A (en) | 2016-08-19 | 2016-08-19 | Line protection method and device for time blind area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106207994A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570427A (en) * | 2012-02-17 | 2012-07-11 | 黑龙江省电力有限公司 | Computed tomography (CT) line breaking processing method applicable to wide area protection |
| CN104714142A (en) * | 2013-12-17 | 2015-06-17 | 河南省电力勘测设计院 | CT and PT wire break detection method suitable for intelligent/digital transformer substation |
| CN105116270A (en) * | 2015-07-16 | 2015-12-02 | 南京国电南自电网自动化有限公司 | Mutual inductor fault detection method for merging unit and protection control device |
-
2016
- 2016-08-19 CN CN201610689436.5A patent/CN106207994A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570427A (en) * | 2012-02-17 | 2012-07-11 | 黑龙江省电力有限公司 | Computed tomography (CT) line breaking processing method applicable to wide area protection |
| CN104714142A (en) * | 2013-12-17 | 2015-06-17 | 河南省电力勘测设计院 | CT and PT wire break detection method suitable for intelligent/digital transformer substation |
| CN105116270A (en) * | 2015-07-16 | 2015-12-02 | 南京国电南自电网自动化有限公司 | Mutual inductor fault detection method for merging unit and protection control device |
Non-Patent Citations (1)
| Title |
|---|
| 张超: "张超", 《中国优秀博士学位论文全文数据库 工程科技Ⅱ辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Patnaik et al. | AC microgrid protection–A review: Current and future prospective | |
| CN108923415B (en) | Information physical cooperative attack analysis method in intelligent power grid line protection | |
| EP3216644B1 (en) | Distributed protection system for power supply at sections of electrified railway propulsion system | |
| CN101917064B (en) | Back-up protection processing method of digital substation transformer based on GOOSE mode | |
| CN103580009B (en) | Based on self adaptation overload recognition system and the method thereof of composite phasor plane | |
| CN105158647B (en) | Dan Zhanduan electric network failure diagnosis and aid decision-making method based on grid monitoring system | |
| CN104316836B (en) | Online grid fault detection method based on relative protection entropy and nominal transition resistance | |
| Habib et al. | Decentralized multi-agent system for protection and the power restoration process in microgrids | |
| CN110605999B (en) | Measurement and control protection system and method for through type in-phase power supply network | |
| Gomes et al. | Microgrid protection schemes | |
| CN110098602B (en) | Power grid line fault isolation device and method | |
| CN108134378A (en) | A kind of DC protection system and direct current protecting implementation method | |
| Mirsaeidi et al. | Review and analysis of existing protection strategies for micro-grids | |
| CN116599059B (en) | Multi-source traction power supply system fault section discrimination and power supply optimization method and device | |
| CN111146773A (en) | Single-phase earth fault self-healing method for small current grounding system | |
| CN110729710A (en) | Method for identifying grounding and phase-to-phase faults of micro-grid | |
| CN105226666B (en) | To the check method of reactive apparatus running status in transformer station's automatism voltage control | |
| CN107910855B (en) | A kind of connection applied to intelligent substation cuts small power supply device | |
| CN101958579A (en) | Method of treating information loss in centralized protection device of digitalized substation | |
| CN110112708A (en) | A kind of traveling-wave differential protection method and system towards VSC-MTDC | |
| CN106998054A (en) | A kind of intelligent substation data reliability recognition methods based on information fusion | |
| CN107819321A (en) | A kind of power distribution network distribution differential protecting method of on-load switch | |
| CN106207994A (en) | Line protection method and device for time blind area | |
| CN202034768U (en) | Microcomputer protective relaying device suitable for low voltage power distribution network and system thereof | |
| CN106329493B (en) | The region distance in adaptive locking domain protects system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161207 |
|
| RJ01 | Rejection of invention patent application after publication |