CN105548801B - Fault Locating Method suitable for power distribution network operation with closed ring - Google Patents
Fault Locating Method suitable for power distribution network operation with closed ring Download PDFInfo
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- CN105548801B CN105548801B CN201510869787.XA CN201510869787A CN105548801B CN 105548801 B CN105548801 B CN 105548801B CN 201510869787 A CN201510869787 A CN 201510869787A CN 105548801 B CN105548801 B CN 105548801B
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- 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
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- 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
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Locating Faults (AREA)
Abstract
The invention discloses the Fault Locating Methods for being suitable for power distribution network operation with closed ring, belong to the technical field of system for distribution network of power automation.The method is positioned for the distribution network failure of Electromagnetic coupling or open loop and cyclization mixed running, each switchgear distribution has terminal in power distribution network, malfunction, current direction information and the switch switch status information of adjacent switch terminal peer-to-peer communications real-time, interactive acquisition, detect failure and be not detected the switch of failure according to the malfunction and power of its all adjacent switch in section opposite side it is positive and negative whether with this switch unanimously come position-sensing switch fault section.The present invention realizes positioning and isolation rapidly and efficiently to the short trouble occurred in operation with closed ring distribution network line, improves power supply real-time, safety, reliability.
Description
Technical field
The invention discloses the Fault Locating Methods for being suitable for power distribution network operation with closed ring, belong to system for distribution network of power automation
Technical field.
Background technique
Feeder automation (FA, Feeder Automation) refers to and utilizes automation equipment or system monitoring distribution line
Operation conditions, find line fault in time, be diagnosed to be fault section rapidly and fault section is isolated, and restore to non-faulting
The power supply in section.
Distribution network line protection and the protections of power grids circuits have biggish difference, especially mesolow distribution line with
Transmission line of electricity is compared, and distance is shorter (usually not more than 1km) between usual two switch, and the fault current of sections different in this way is poor
Different very little can be ignored, according to fault current it is differential come realize route protection obviously can not；From temporal cooperation
For, since the number of switches of one feeder line of distribution is more, but substation exit switch usually adjusting failure Outlet time is 0,
Even if will lengthen the time, in order to protect station in equipment, will not adjust more than 500ms, also be difficult reality in time in this way
Existing multistage cooperation.Therefore, the mode that the route protection of distribution is difficult to adopt cascaded coordination in route protection completes fault section
Isolation.Feeder automation skill is mainly sequentially overlapped in Current Distribution Automation using centralized FEEDER AUTOMATION or on the spot
Art.Centralized FEEDER AUTOMATION is that the failure relevant information in a region is uploaded to main website or substation, by main website or
Substation carries out fault diagnosis, and then completes troubleshooting；It is to utilize voltage or electric current that sequence, which is overlapped FEEDER AUTOMATION, on the spot
Cooperated with the time, completes troubleshooting in such a way that multiple switch is overlapped.Centralized FEEDER AUTOMATION is limited by
The scale in region, real-time are had a greatly reduced quality as area's device within the domain increases, and influence power supply reliability；Sequence coincidence system on the spot
With the power failure of time and non-faulting region, or even to be repeatedly overlapped impact system as the isolation of cost completion failure, equally influence
Power supply real-time, safety and reliability.
Intelligent distribution type feeder automation technology realizes troubleshooting based on peer-to-peer communications between the terminal of adjacent switch, but
Seek a kind of simple but adaptable Fault Locating Method, is still currently to solve the problems, such as.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the deficiency of above-mentioned background technique, provides and closed suitable for power distribution network
The Fault Locating Method of inscription of loop, the Electromagnetic coupling under the rack of more power supplys (grid-connected including distributed generation resource) in power distribution network, with
And under cyclization and open loop and the method for operation deposited, positioning and isolation rapidly and efficiently are realized to the short trouble occurred in route,
Solves the technical issues of existing distribution network failure location technology influences power supply real-time, safety, reliability.
The present invention adopts the following technical scheme that for achieving the above object
Suitable for the Fault Locating Method of power distribution network operation with closed ring, the method is for Electromagnetic coupling or open loop and cyclization
The short circuit fault of power distribution network of mixed running positions, and each switchgear distribution has terminal in power distribution network, and adjacent switch terminal peer-to-peer communications are real
When interaction acquisition malfunction, current direction information and switch switch status information, according to face-to-face or back-to-back
Principle determines the switch positive direction respectively switched in power distribution network,
To the switch for detecting failure: if detecting event without switch in its any one all adjacent switch in section opposite side
Barrier, alternatively, detecting that the power of the switch of failure is positive and negative all consistent with this switch in all adjacent switches in the section opposite side, then
Determine that short dot switchs the section at this, detects the positioning result F for the section I that the switch of failure is connectedIAre as follows:
O, V is detection
Fault detection index, current direction to breakdown switch, OI1、OImFor detect the opposite side breakdown switch institute jointing I the 1st,
The fault detection index of m-th of adjacent switch, VI1、VImTo detect the opposite side breakdown switch institute jointing I the 1st, m-th
The current direction of adjacent switch,
To be not detected failure and be in "on" position switch: if in its any one all adjacent switch in section opposite side
Only one switch detects failure, alternatively, detecting the power of the switch of failure in all adjacent switches in the section opposite side
It is positive and negative consistent, then determine that short dot switchs the section at this, failure is not detected and the switch in "on" position is connected
Section I positioning result FIAre as follows:
S is that failure and the opening and closing state label in "on" position switch, O is not detectedI1、OImFor failure is not detected and is in
"on" position switchs the fault detection index of the 1st, m-th adjacent switch in the opposite side institute jointing I, VI1、VImTo be not detected
Failure and the current direction that the 1st, m-th adjacent switch in the opposite side institute jointing I is switched in "on" position.
Further, described suitable for the Fault Locating Method of power distribution network operation with closed ring, according to face-to-face or back-to-back
Principle determine the specific steps of the switch positive direction respectively switched in power distribution network are as follows:
A, it determines that starting switchs positive direction: switching and specified from its any zone for starting with any switch and be directed toward another area
The direction of section is positive direction；
B, determination and starting switch the positive direction of adjacent all switches:
For the adjacent switch that starting switch positive direction is directed toward, to be directed toward the direction of initial switch as positive direction,
For the adjacent switch being directed toward away from starting switch positive direction, to be positive in the opposite direction with initial switch pros
Direction；
C, the pros of other switches are determined step by step according to the determination method for switching adjacent all switch positive directions with starting
To.
Scheme is advanced optimized as the Fault Locating Method suitable for power distribution network operation with closed ring, switch terminal is adopted
Collect the method for fault status information are as follows: when actual current or zero-sequence current are greater than setting valve, be judged to detecting failure；It is no
Then, it is judged to that failure is not detected.
As the scheme that advanced optimizes for the Fault Locating Method stated suitable for power distribution network operation with closed ring, switch terminal acquisition
The method of current direction information are as follows: in switch power be timing, it is identical to determine that the current direction of the switch with it switchs positive direction；
When switch power is negative, it is opposite to determine that the current direction of the switch with it switchs positive direction.
Scheme is advanced optimized as the Fault Locating Method suitable for power distribution network operation with closed ring, switch terminal is
FTU or DTU.
The present invention by adopting the above technical scheme, has the advantages that
(1) a kind of Fault Locating Method suitable for power distribution network operation with closed ring, adjacent switch terminal peer-to-peer communications are proposed
Malfunction, current direction information and the switch switch status information of real-time, interactive acquisition, detect failure and do not detect
Whether the switch to failure is positive and negative consistent with this switch according to the malfunction and power of its all adjacent switch in section opposite side
Carry out position-sensing switch fault section, does not need image set Chinese style FEEDER AUTOMATION like that for the failure relevant information in a region
Be uploaded to main website or substation, fault diagnosis carried out by main website or substation, do not need yet on the spot sequence coincidence system like that with the time
With the power failure in non-faulting region, or even using be repeatedly overlapped impact system as cost complete failure isolation, to operation with closed ring distribution
The short trouble occurred in cable road realizes positioning and isolation rapidly and efficiently, improves power supply real-time, safety, reliability；
(2) the invention also provides a kind of switch positive directions with adjacent switch " face-to-face, back-to-back " to determine method, this
Sample definition switch positive direction does not need switch, regardless of rack has mostly complexity, without the concern for network trend, in fault location
Consider that this switch is in upstream or downstream, the positioning and isolation of each respective complete independently failure of switch.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 (a) to Fig. 1 (c) is that the switch positive direction of each switch in rack determines step.
Fig. 2 is to share failure relevant information schematic diagram in rack between adjacent switch.
Fig. 3 is the failure schematic diagram under open loop and cyclization hybrid operation mode.
Fig. 4 is the failure schematic diagram under Electromagnetic coupling mode.
Specific embodiment
Embodiments of the present invention are described below in detail, the embodiment below with reference to attached drawing description is exemplary
, for explaining only the invention, and it is not construed as limiting the claims.
It will be understood to those skilled in the art that unless otherwise defined, all terms used herein (including technical term
And scientific term) the identical meaning of general understanding with the ordinary technical staff in the technical field of the invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
In this example, each switch is by a FTU (Feeder Terminal Unit, feeder terminal unit)/DTU
(Distribution Terminal Unit, power distribution station institute terminal) is managed, the real-time refresh switch of every FTU/DTU it is distant
Letter and telemetry intelligence (TELINT), and have the split ability for putting row separating brake and closing operation into.
In this example, the FTU/DTU of each switch is according to actual topology, configures that the switch and its two sides are all adjacent to open
The connection relationship of pass, and ensure to establish reliable peer-to-peer communications relationship respectively with the FTU/DTU of its two sides adjacent switch.
1 switch positive direction is specified
1) the switch positive direction of starting switch is defined.Some switch (general choose switchs at power supply point) in rack is chosen,
It is arbitrarily designated it and switchs positive direction, the side section II is directed toward by the side section I or the side section I is directed toward by the side section II.
2) the switch positive direction that adjacent all switches are switched with starting is defined.Some adjacent switch of starting switch is come
It says, if the switch positive direction of starting switch is defined as being directed toward this switch, the switch positive direction of this switch, which is also defined as, to be directed toward
Begin switch, this rule is referred to as " face-to-face "；If the switch positive direction of starting switch is defined as backwards to this switch, this switch is opened
It closes positive direction to be also defined as backwards to starting switch, this rule is referred to as " back-to-back ".
3) determine that the switch of other switches is square step by step according to adjacent switch described in 2) " face-to-face, back-to-back " mode
To.
In this example, the switch positive direction of all switches of K1~K10 in rack is determined, it is necessary first to definition starting switch
Switch positive direction, here specify K3 switch switch positive direction by C section be directed toward D section, as shown in Fig. 1 (a)；So to K3
For the adjacent switch K4 of switch, the switch positive direction of K3 switch is directed toward this switch-side, it is thus determined that the switch of K4 switch is square
It is directed toward D section to by E section, equally for the adjacent switch K2 of K3 switch, the switch positive direction of K3 switch is backwards to this switch
Side, it is thus determined that the switch positive direction of K2 switch is directed toward B section by C section, as shown in Fig. 1 (b).It in the above manner, can one
Grade grade determines the switch positive direction of all switches in rack.As shown in Fig. 1 (c).
2 adjacent switch information exchanges
As shown in Fig. 2, in network frame topology this switch can be shared to other side by respective FTU/DTU between adjacent switch
Two information, comprising: whether detect failure, current direction and switch opening and closing state.
Whether failure is detected --- O (OverI) is not detected failure and is denoted as 0, detects that failure is 1.
The flow direction of electric current --- V (Vector), the flow direction of electric current is determined according to the power of switch: when certain switch power is positive
When, switching current flow direction is identical as switch positive direction, and current direction is identical as positive direction to be denoted as 0；When certain switch power is negative
When, switching current flow direction and switch positive direction are anti-, and current direction is opposite with positive direction to be denoted as 1.
Division state --- S (State) is switched, switch state is that separating brake is denoted as 0, and state is to close a floodgate to be denoted as 1.
O determination method: being adjusted overcurrent/zero-sequence current definite value of this switch by FTU/DTU, and actual current/zero-sequence current is big
Then it is determined as 1 when definite value, is then determined as 0 less than definite value；
V determination method: being reference with voltage, when FTU/DTU collects flowing to the switch of the switch just for switching current
When direction is consistent, the Vector of the switch is determined as 0；When FTU/DTU collects the flow direction and the switch of the switch of switching current
When positive direction is opposite, the Vector of the switch is determined as 1.
S determination method: when switch is in gate-dividing state, switch State is determined as 0；It, should when switch is in "on" position
Switch State is determined as 1.
3 fault location
The FTU/DTU of each switch switchs the switch fault of adjacent all switches according to this switch and with this in topology
Information, completion fault location independent.
The content of fault location:
Section --- the F whether short dot connects in this switchI/FIIIf the section I that short dot is connected in this switch,
FIIt is determined as 1, is otherwise 0；If section II, F that short dot is connected in this switchIIIt is determined as 1, is otherwise 0.
The criterion of fault location:
If there be m adjacent switch in the switch opposite side section I, switching information is denoted as O respectivelyI1、VI1、SI1..., OIm、VIm、SIm,
Section I positioning result is denoted as FI.There is n adjacent switch in the switch opposite side section II, and switching information is denoted as O respectivelyII1, VII1,
SII1..., OIIn, VIIn, SIIn, section II positioning result is denoted as FII。
1) for the switch for detecting failure, if not switching and detecting in all adjacent switches in the opposite side its section I
The power of all switches for detecting failure is positive and negative all consistent with this switch in failure or these switches, then determines that short dot exists
This switch section I.The switch section II is positioned similarly.
2) to failure is not detected and is in for the switch of "on" position, if all adjacent switches in the opposite side its section I
In, only one switch detects that the power of all switches for detecting failure in failure or these switches is positive and negative consistent, then
Determine short dot in this switch section I.This switch section II is positioned similarly.
This example is by the positioning analysis to the same section short trouble under two kinds of methods of operation, to illustrate fault location
Logic.
In this example, as shown in figure 3, the rack takes open loop and cyclization hybrid operation mode.K7 switch is opened as contact
It closes.After short trouble occurs for E section, K1~K4, K9 and K10 switch detect failure in the rack, other switches do not detect
To failure；It detects in the switch of failure, the power of K1, K3 and K10 switch is positive, and the power of K2, K4 and K9 switch is negative.Root
According to fault location principle:
For K9 switch, this switch detects failure, and power is negative.This switch J only has side K10 switch to detect event
Barrier, but the power of K10 switch is positive, it is inconsistent with this switch, therefore failure does not occur in the lateral areas this switch J section；The side this switch E
Only K4 switch detects failure, and the power of K4 switch is negative, consistent with this switch, therefore failure occurs in the lateral areas E section, this
Switch needs to trip with isolated fault.
For K4 switch, this switch detects failure, and power is negative.This switch D only has side K3 switch to detect event
Barrier, but the power of K3 switch is positive, it is inconsistent with this switch, therefore failure does not occur in the lateral areas this switch D section；The side this switch E
Only K9 switch detects failure, and the power of K9 switch is negative, consistent with this switch, therefore failure occurs in the lateral areas E section, this
Switch needs to trip with isolated fault.
For K5 switch, failure is not detected in this switch.The side this switch F, which does not switch, detects failure, therefore failure
Do not occur in the lateral areas this switch F section；This switch E only has side K4 and K9 to detect failure, and K4 and K9 power is negative, therefore therefore
Barrier occurs in the lateral areas E section, this switch needs to trip with isolated fault.
In this example, as shown in figure 4, the rack takes Electromagnetic coupling mode, i.e., any load has multiple power supplys simultaneously
Power supply.After short trouble occurs for E section, K1~K10 switch detects failure in the rack；Detect the switch of failure
In, the power of K1, K3, K6, K8 and K10 switch is positive, and the power of K2, K4, K5, K7 and K9 switch is negative.According to fault location
Principle:
For K9 switch, this switch detects failure, and power is negative.This switch J only has side K10 switch to detect event
Barrier, but the power of K10 switch is positive, it is inconsistent with this switch, therefore failure does not occur in the lateral areas this switch J section；The side this switch E
Only K4 and K5 switch detects failure, and the power of K4 and K5 switch is negative, consistent with this switch, therefore failure occurs
The lateral areas E section, this switch need to trip with isolated fault.
For K4 switch, this switch detects failure, and power is negative.This switch D only has side K3 switch to detect event
Barrier, but the power of K3 switch is positive, it is inconsistent with this switch, therefore failure does not occur in the lateral areas this switch D section；The side this switch E
Only K9 and K5 switch detects failure, and the power of K9 and K5 switch is negative, consistent with this switch, therefore failure occurs
The lateral areas E section, this switch need to trip with isolated fault.
In conclusion the present invention by adopting the above technical scheme, has the advantages that
(1) a kind of Fault Locating Method suitable for power distribution network operation with closed ring, adjacent switch terminal peer-to-peer communications are proposed
Malfunction, current direction information and the switch switch status information of real-time, interactive acquisition, detect failure and do not detect
Whether the switch to failure is positive and negative consistent with this switch according to the malfunction and power of its all adjacent switch in section opposite side
Carry out position-sensing switch fault section, does not need image set Chinese style FEEDER AUTOMATION like that for the failure relevant information in a region
Be uploaded to main website or substation, fault diagnosis carried out by main website or substation, do not need yet on the spot sequence coincidence system like that with the time
With the power failure in non-faulting region, or even using be repeatedly overlapped impact system as cost complete failure isolation, to operation with closed ring distribution
The short trouble occurred in cable road realizes positioning and isolation rapidly and efficiently, improves power supply real-time, safety, reliability；
(2) the invention also provides a kind of switch positive directions with adjacent switch " face-to-face, back-to-back " to determine method, this
Sample definition switch positive direction does not need switch, regardless of rack has mostly complexity, without the concern for network trend, in fault location
Consider that this switch is in upstream or downstream, the positioning and isolation of each respective complete independently failure of switch.
Claims (5)
1. being suitable for the Fault Locating Method of power distribution network operation with closed ring, it is characterised in that: the method for Electromagnetic coupling or
The short circuit fault of power distribution network of open loop and cyclization mixed running positions, and each switchgear distribution has terminal, adjacent switch terminal in power distribution network
Malfunction, current direction information and the switch switch status information of peer-to-peer communications real-time, interactive acquisition, according to face-to-face
Or back-to-back principle determines the switch positive direction respectively switched in power distribution network,
To the switch for detecting failure: if detecting failure without switch in its any one all adjacent switch in section opposite side,
Alternatively, detecting that the power of the switch of failure is positive and negative all consistent with this switch in all adjacent switches in the section opposite side, then sentence
Determine short dot and switch the section at this, detects the positioning result F for the section I that the switch of failure is connectedIAre as follows:
O, V is to detect event
Hinder fault detection index, the current direction of switch, OI1、OImTo detect the opposite side breakdown switch institute jointing I the 1st, m
The fault detection index of a adjacent switch, VI1、VImFor detect the opposite side breakdown switch institute jointing I the 1st, m-th it is adjacent
The current direction of switch,
To be not detected failure and be in "on" position switch: if in its any one all adjacent switch in section opposite side only
One switch detects failure, alternatively, detecting that the power of the switch of failure is positive and negative in all adjacent switches in the section opposite side
It is consistent, then determine that short dot switchs the section at this, failure is not detected and is in the area that the switch of "on" position is connected
The positioning result F of section IIAre as follows:
S is not examine
Measure failure and the opening and closing state label in "on" position switch, OI1、OImFor failure is not detected and in "on" position
Switch the fault detection index of the 1st, m-th adjacent switch in the opposite side institute jointing I, VI1、VImFor failure and place is not detected
In the current direction of "on" position switch the 1st, m-th adjacent switch in the opposite side institute jointing I.
2. the Fault Locating Method according to claim 1 suitable for power distribution network operation with closed ring, which is characterized in that according to face
Opposite or back-to-back principle determine the specific steps of the switch positive direction respectively switched in power distribution network are as follows:
A, it determines that starting switchs positive direction: switching and specify for starting with any switch and be directed toward another section from its any zone
Direction is positive direction；
B, determination and starting switch the positive direction of adjacent all switches:
For the adjacent switch that starting switch positive direction is directed toward, to be directed toward the direction of initial switch as positive direction,
For the adjacent switch being directed toward away from starting switch positive direction, to be in the opposite direction square with initial switch pros
To；
C, the positive direction of other switches is determined step by step according to the determination method for switching adjacent all switch positive directions with starting.
3. the Fault Locating Method according to claim 1 or 2 suitable for power distribution network operation with closed ring, which is characterized in that open
The method for closing terminal acquisition fault status information are as follows: when actual current or zero-sequence current are greater than setting valve, be judged to detecting
Failure；Otherwise, it is determined that for failure is not detected.
4. the Fault Locating Method according to claim 1 or 2 suitable for power distribution network operation with closed ring, which is characterized in that open
Close terminal acquisition current direction information method are as follows: switch power be timing, determine that the current direction of the switch is switched with it
Positive direction is identical；When switch power is negative, it is opposite to determine that the current direction of the switch with it switchs positive direction.
5. the Fault Locating Method according to claim 1 suitable for power distribution network operation with closed ring, which is characterized in that switch is eventually
End is FTU or DTU.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106385013B (en) * | 2016-09-30 | 2018-07-20 | 国网江苏省电力公司扬州供电公司 | The fault location shielding system and its working method of the adaptive power distribution network method of operation |
| CN109655709A (en) * | 2018-10-19 | 2019-04-19 | 南京海兴电网技术有限公司 | A kind of Fault Locating Method based on distributed feeder automation |
| CN109946567B (en) * | 2019-04-01 | 2020-12-18 | 石家庄科林电气股份有限公司 | Distributed intelligent FA fault positioning method based on direction identification |
| CN110865278B (en) * | 2019-12-05 | 2022-07-29 | 南京四方亿能电力自动化有限公司 | Ground fault positioning method based on transient mutation energy capturing method |
| CN113295968B (en) * | 2021-06-25 | 2022-06-14 | 广东电网有限责任公司 | Fault positioning method for multi-source information of power distribution network master station |
| CN113589102B (en) * | 2021-07-31 | 2024-07-30 | 江苏大烨智能电气股份有限公司 | FTU-based broken line fault section positioning method and system |
| CN114184888A (en) * | 2021-11-30 | 2022-03-15 | 贵州电网有限责任公司 | Fault positioning method for dual-power supply line |
| CN114336544A (en) * | 2021-12-14 | 2022-04-12 | 南京瀚元科技有限公司 | Self-adaptive feeder automation algorithm for hybrid net rack |
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| GB233431A (en) * | 1924-02-08 | 1925-05-08 | Wilhelm Firley | Improved means for testing electric circuits |
| CN102707198A (en) * | 2012-06-21 | 2012-10-03 | 冀北电力有限公司张家口供电公司 | Feeder automation failure positioning method based on failure backcasting |
| CN102761108A (en) * | 2012-07-18 | 2012-10-31 | 积成电子股份有限公司 | Logic operation-based distributed feeder automatization fault judgment method |
| CN104459465A (en) * | 2014-11-26 | 2015-03-25 | 国家电网公司 | Fault section locating method for power distribution network containing distributed power supplies |
| CN104914356A (en) * | 2015-06-21 | 2015-09-16 | 国家电网公司 | Distribution network fault positioning method based on network structure matrix |
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Effective date of registration: 20200320 Address after: No. 80 moling streets Suyuan road Jiangning District Nanjing city Jiangsu province 211100 Co-patentee after: BEIJING SIFANG PROJECT Co.,Ltd. Patentee after: NANJING SIFANG EPOWER ELECTRIC POWER AUTOMATION Co.,Ltd. Address before: No. 80 moling streets Suyuan road Jiangning District Nanjing city Jiangsu province 211100 Patentee before: NANJING SIFANG EPOWER ELECTRIC POWER AUTOMATION Co.,Ltd. |