CN110323724A - A kind of the ring distribution system protective relaying device and control method of automatic discriminating direction - Google Patents
A kind of the ring distribution system protective relaying device and control method of automatic discriminating direction Download PDFInfo
- Publication number
- CN110323724A CN110323724A CN201910554443.8A CN201910554443A CN110323724A CN 110323724 A CN110323724 A CN 110323724A CN 201910554443 A CN201910554443 A CN 201910554443A CN 110323724 A CN110323724 A CN 110323724A
- Authority
- CN
- China
- Prior art keywords
- protective relaying
- relaying device
- node
- current
- controller
- 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.)
- Granted
Links
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
- H02H7/261—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 involving signal transmission between at least two stations
-
- 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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
-
- 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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/263—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 involving signal transmission between at least two stations involving transmissions of measured values
-
- 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
- H02H7/28—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 for meshed systems
Abstract
The present invention relates to power grid security technical fields; more particularly to a kind of ring distribution system protective relaying device of automatic discriminating direction; it is deployed at each node of interconnection; including communication module, clock, ammeter, memory and controller; the electric current of interconnection node where ammeter measurement; unique number and node sequence relationship are stored in memory; clock provides current time stamp; communication module and branch current table communicate to connect; communication module, clock, memory and ammeter are connect with controller, the control terminal connection of controller and relay switch.Substantial effect of the invention is: fault branch position can be judged by action signal, to targetedly be cut off, avoid fault spread.
Description
Technical field
The present invention relates to power grid security technical fields, and in particular to a kind of ring distribution system relay guarantor of automatic discriminating direction
Protection unit and control method.
Background technique
Traditional the superior and the subordinate's distribution network protection is mainly the method for leaning on adjusting, realizes the selectivity of the superior and the subordinate's protection act.If
It is differential too small, it be easy to cause leapfrog to act, expands scope of power outage, be not able to satisfy distribution automation and power supply reliability is wanted
It asks；If keeping reliable differential, occurs large-scale impact load in junior region, it is also possible to bring the false protection of junior
Make, Reliability of Power Supplying Net Work is caused to reduce.Therefore, it is necessary to realize that protection can reliably perceive failure letter by a kind of technological means
Number, guarantee the selectivity of protection act when troubles inside the sample space.It solves the problems, such as that power distribution network the superior and the subordinate protective seletion is poor, improves distribution
The reliability of power supply.
Occur by way of active communication at present, Judging fault position, and then realizes and precisely cut off fault branch
Technical solution.Such as Chinese patent CN108123424A, publication date on June 5th, 2018, a kind of ring for taking into account quick-action and selectivity
Net power supply relay protecting method is suitable for unilateral ring network power supply system and passes through between the current protection of traditional reciprocal interlocking
On the basis of mutually sending block signal realization interlocking current protection, signal is allowed to realize interlocking electric current guarantor by mutually sending
Shield improves quick-action and selectivity.The following steps are included: 1) being arranged mutually to send in protective relaying device allows sentencing for signal
Coincidence is according to: breaker and when voltage is less than voltage rating, or receives block signal and electric current is less than definite value, then send out permission
Signal；2) the setting interlocking permissive type current protection operating criterion in protective relaying device: permission signal is received, electric current is greater than connection
Current protection definite value is locked, by interlocking the delay of permissive type current protection time, trip protection.With traditional interlocking enclosed type electricity
Stream protection matches, and constitutes looped network and interlocks current protection.But its bilateral current protection for not being suitable for looped network.
Annular electric supply is that power supply, power circuit, user are closed a kind of power supply mode circularized.This power supply mode,
The power supply phase intermodulation between power supply can be made to help.When line segment any in ring breaks down, All other routes can then power, and can make
User power utilization is unaffected.This power supply mode is generallyd use to responsible consumer, to improve power supply reliability.Annular electric supply is than double
Circuit radiant type power supply economics are good.Thus need to develop a kind of protective relaying device differentiated with direction of tide.
Summary of the invention
It is suitble to the technology of the relay protective plan of ring distribution system to ask the technical problem to be solved by the present invention is lacking at present
Topic.Propose that a kind of failure removal is fast and selectivity is good with automatic discriminating direction ring distribution system protective relaying device and
Control method.
In order to solve the above technical problems, the technical solution used in the present invention are as follows: a kind of annular of automatic discriminating direction is matched
Grid relay protective apparatus, ring distribution system include that at least two power supply buses and an interconnection, interconnection are divided into several segments,
Section at the node of section install node relay switch, one power supply branch of every section of connection, power branch for customer power supply or into
The junction that one step is divided into after several branches power for customer power supply branch and interconnection is respectively mounted the branch with communication function
Ammeter, each node of interconnection dispose the protective relaying device, including communication module, clock, ammeter, memory
And controller, ammeter measure the electric current of place interconnection node, and unique number is stored in memory and node sequence is closed
System, clock provide current time stamp, and communication module and branch current table communicate to connect, communication module, clock, memory and electricity
Flow table is connect with controller, the control terminal connection of controller and relay switch.
Preferably, the communication module is wireless communication module.Wireless communication module facilitates deployment.
Preferably, the following steps are included: A) controller according to direction of tide and node sequence relationship differentiates the superior and the subordinate
Relationship；B) when detecting fault current, controller executes following judgement, if node is saved without junior where protective relaying device
Point then directly issues relay protection action command, disconnected node, and issues and move to the protective relaying device at whole superior nodes
Make signal, if there are downstream sites for node where protective relaying device, enters step C；C) after waiting time T, progress is following to be sentenced
It is disconnected, if receiving the action signal of the protective relaying device at the downstream site of any level-one in time T, it is latched relay protection dress
It sets, keeps node conducting, if not receiving the action signal of the protective relaying device at any downstream site in T time, issue
Relay protection action command, disconnected node.By active communication, can accurate judgement there is the position of fault current, make branch
Excision is more selective, effectively avoids fault spread.
Preferably, the time T that the protective relaying device at the more node of downstream site waits is longer.
Preferably, judging that the method for direction of tide specifically includes in step A: A1) controller reads ammeter and measures
The current value arrived, controller are sent in a broadcast manner using unique number, current value and timestamp as packet；A2 it) controls
Device processed receives the packet that the protective relaying device at two side gussets is sent, and controller reads the branch current of node two sides simultaneously
The value of table；A3 the difference of the surveyed current value of two sides protective relaying device Yu branch current table measured value) is calculated separately, difference and current
The protective relaying device of the closer side of the read current value of controller is the higher level of current protective relaying device, difference
The protective relaying device for the side being negative is the junior of current protective relaying device, and two sides difference is positive, then the relay protection
Device is without junior's protective relaying device.By current vs, relationship between superior and subordinate can be accurately differentiated, and there is real time discriminating
Function, keep the differentiation of direction of tide more acurrate.
Preferably, being specifically included to the method that the protective relaying device at whole superior nodes issues action signal following
Step: B1) after relationship between superior and subordinate determines, each protective relaying device stores unique volume of its whole juniors' protective relaying device
Number；B2) controller of protective relaying device reads the obtained current value of ammeter measurement, and with period t by unique number, electric current
Value and timestamp are sent in a broadcast manner as packet；B3) controller core of protective relaying device closes the superior and the subordinate
System differentiates relationship between superior and subordinate if relationship between superior and subordinate checks mistake again；B4) when the relay of no junior's protective relaying device is protected
When protection unit detects fault current, disconnected node, and packet of going off the air, whole higher level's relays of the protective relaying device
The continuous two period t of protective device do not receive the packet of protective relaying device broadcast, then it is assumed that have received the relay protection
The action signal of device.
Preferably, step C specifically: when the protective relaying device with junior's protective relaying device detects failure electricity
When stream, packet of going off the air waits two period t, if whole juniors protective relaying device is protected in two period t
Broadcast message packet is held, then the protective relaying device disconnected node, if there are junior's protective relaying devices not in two period t
Broadcast message packet, then be considered as the action signal for receiving junior's protective relaying device, and latch-up protection keeps node conducting.
When the protective relaying device with junior's protective relaying device detects fault current, packet of going off the air,
Two period t are waited, if whole juniors protective relaying device keeps broadcast message packet, then the relay in two period t
Protective device disconnected node is then considered as and receives if there are the non-broadcast message packets of junior's protective relaying device in two period t
The action signal of junior's protective relaying device, latch-up protection keep node conducting.This preferred embodiment uses, and trend is differentiated institute
The packet needed, periodic broadcast are sent, and can bring the following benefits: multiplexed information packet makes packet transmit electricity
Stream information is used as direction of tide and differentiates, while transmitting action protection signal, is used as fault branch location determination；Hold period
Communication, when there are communication module failure, can find in time, when avoiding the occurrence of fault current, not due to communication module damage
Action message can be transmitted in time, cause higher level's protective relaying device to malfunction, fault spread；The packet that will go off the air is as dynamic
The problem of making signal, cleverly avoiding wireless communication delay and communication channel blocking.
Preferably, further including step D) after fault current disappears, the protective relaying device at node that is held on
Again differentiate relationship between superior and subordinate, and execute step B-C；The protective relaying device of node gap passes through communication module for node position
It sets and uploads to power distribution network repair center.After fault branch is removed, the protective relaying device at non-disconnected node is reformulated
New protection；Power distribution network repair center is sent by node open position, fault location can be facilitated, improves maintenance effect
Rate.
Preferably, step B2 further include: if do not received in the continuous two period t of a certain protective relaying device its junior after
The broadcast message packet of electrical protective device, and fault current is not detected in the ammeter of the protective relaying device, then will not broadcast letter
The unique number for ceasing the protective relaying device of packet is sent to power distribution network repair center.The communication mould to break down can be found in time
Block overhauls in time.
Preferably, controller also executes following steps simultaneously: receiving the protective relaying device at the adjacent node of side
Current value calculates protective relaying device and the protective relaying device electric current obtained at the side adjacent node at present node
Be worth and value and difference, take absolute value；Read the collateral road ammeter measured value；If the measured value of branch current table is i.e. not
Equal to described and value, also it is not equal to the absolute value of the difference, then determines that the branch has electric leakage, which is reported and is matched
Grid maintenance center.This preferred embodiment, being capable of auxiliary judgment branch leak current fault.
Substantial effect of the invention is: by periodic broadcast current value, direction of tide differentiation is carried out, while will be stopped
Broadcast current value makes excision movement is time-consuming to reduce in two broadcast cycles, due to the time-consuming of wireless communication as action signal
Short, broadcast cycle can be much smaller than the waiting time of current relay protection setting, it is thus possible to effectively accelerate the speed of protection act
Degree；Fault branch position can be judged by action signal, to targetedly be cut off, avoid fault spread；Not
When failure electric current, periodic broadcast current value can find the communication module to break down in time, replace, avoid in time
Because communication module damage leads to fault spread；Periodic broadcast signal will not be received as action message, can offset channel radio
The delay in each stage in letter influences the transmitting of action signal by communication delay, accelerates the excision of fault branch, effectively
Ensure power network safety operation.
Detailed description of the invention
Fig. 1 is one protective relaying device structural schematic diagram of embodiment.
Fig. 2 is one protective relaying device of embodiment in ring distribution system deployed position schematic diagram.
Fig. 3 is one protective relaying device control method flow diagram of embodiment.
Wherein: 100, ammeter, 200, memory, 300, communication module, 400, controller, 500, clock.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, a specific embodiment of the invention is further described in detail.
Embodiment one:
A kind of ring distribution system protective relaying device of automatic discriminating direction, ring distribution system include at least two power supply buses and
A piece interconnection, interconnection are divided into several segments, and node relay switch is installed at the node of section and section, as shown in Fig. 2, node 563,
Node 563-1, node 563-2, node 001, node 654-2, node 654-1 and node 654, by connection A-bus and B bus
Interconnection be divided into four sections, interior joint 563 and node 654 are bus gate out switch, and every section is all connected with power supply branch, power supply
Branch is divided into several branches again, and the trend of branch road is unidirectional trend, and relay protective plan can refer to the present embodiment implementation.
Power supply branch and the junction of interconnection are respectively mounted the branch current table 100 with communication function, node 563 on interconnection,
Node 563-1, node 563-2, node 001, node 654-2, node 654-1 and node 654 dispose protective relaying device,
As shown in Figure 1, protective relaying device includes communication module 300, clock 500, ammeter 100, memory 200 in the present embodiment
With controller 400, ammeter 100 measures the electric current of place interconnection node, is stored with unique number and section in memory 200
Dot sequency relationship, clock 500 provide current time stamp, and communication module 300 and branch current table 100 communicate to connect, communication module
300, clock 500, memory 200 and ammeter 100 are connect with controller 400, the control of controller 400 and relay switch
End connection.Clock 500 can be external clock, be also possible to the clock 500 having built in controller 400.Communication module 300 is
Wireless communication module 300.The ZigBee technology of low-power consumption can be used, the enough the present embodiment of the transmission rate of ZigBee are implemented.
A kind of control method of the ring distribution system protective relaying device of discriminating direction automatic as the aforementioned, as shown in figure 3,
The following steps are included: A) controller 400 according to direction of tide and node sequence relationship differentiates relationship between superior and subordinate.It specifically includes:
A1) controller 400 reads ammeter 100 and measures obtained current value, and controller 400 is by unique number, current value and time
Stamp is sent in a broadcast manner as packet；A2) controller 400 receives the letter that the protective relaying device at two side gussets is sent
Breath packet, controller 400 read the value of the branch current table 100 of node two sides simultaneously；A3 two sides protective relaying device) is calculated separately
The difference of surveyed current value and 100 measured value of branch current table, difference and the read current value of current controller 400 are closer
The protective relaying device of side is the higher level of current protective relaying device, and the protective relaying device for the side that difference is negative is to work as
The junior of preceding protective relaying device, two sides difference are positive, then the protective relaying device is without junior's protective relaying device.Pass through electricity
Stream comparison, can accurately differentiate relationship between superior and subordinate, and have the function of real time discriminating, keep the differentiation of direction of tide more quasi-
Really.
B) when detecting fault current, controller 400 execute following steps: B1) relationship between superior and subordinate determine after, Mei Geji
Electrical protective device stores the unique number of its whole juniors protective relaying device；B2) controller 400 of protective relaying device is read
Ammeter 100 measures obtained current value, and using period t by unique number, current value and timestamp as packet, with wide
The mode broadcast is sent, if not receiving the broadcast of its junior's protective relaying device in the continuous two period t of a certain protective relaying device
Packet, and fault current is not detected in the ammeter 100 of the protective relaying device, then by the relay protection of non-broadcast message packet
The unique number of device is sent to power distribution network repair center.The communication module 300 to break down can be found in time, examined in time
It repairs；B3) controller 400 of protective relaying device checks relationship between superior and subordinate, if relationship between superior and subordinate checks mistake, again in differentiation
Inferior relation；B4) when the protective relaying device of no junior's protective relaying device detects fault current, disconnected node, and stop
Only broadcast message packet, the continuous two period t of whole higher level's protective relaying devices of the protective relaying device do not receive relay guarantor
The packet of protection unit broadcast, then it is assumed that have received the action signal of the protective relaying device.
C) when the protective relaying device with junior's protective relaying device detects fault current, information of going off the air
Packet, waits two period t, if whole juniors protective relaying device keeps broadcast message packet in two period t, then should
Protective relaying device disconnected node is then considered as if there are the non-broadcast message packets of junior's protective relaying device in two period t
The action signal of junior's protective relaying device is received, latch-up protection keeps node conducting.
D) after fault current disappears, the protective relaying device at node being held on differentiates relationship between superior and subordinate again,
And execute step B-C；Node location is uploaded to power distribution network inspection by communication module 300 by the protective relaying device of node gap
Repair center.After fault branch is removed, the protective relaying device at non-disconnected node reformulates new protection；Node is broken
Open position is sent to power distribution network repair center, can facilitate fault location, improves overhaul efficiency.
Controller 400 also executes following steps simultaneously: the current value of the protective relaying device at the adjacent node of side is received,
Calculate the protective relaying device current value obtained at present node at protective relaying device and the side adjacent node and
Value and difference, take absolute value；Read collateral 100 measured value of road ammeter；If the measured value of branch current table 100 is i.e. not
It is equal to and is worth, be also not equal to the absolute value of difference, then determines that the branch has electric leakage, report power distribution network to overhaul the bypass position
Center.This preferred embodiment, being capable of auxiliary judgment branch leak current fault.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (9)
1. a kind of ring distribution system protective relaying device of automatic discriminating direction, ring distribution system includes at least two power supply buses
With an interconnection, interconnection is divided into several segments, and node relay switch, one power supply of every section of connection are installed at the node of section and section
Branch, power supply branch is customer power supply or to be further separated into after several branches be customer power supply, power branch and interconnection
Junction is respectively mounted the branch current table with communication function, and each node of interconnection disposes the protective relaying device,
It is characterized in that,
Including communication module, clock, ammeter, memory and controller, the electric current of interconnection node, is deposited where ammeter measurement
Unique number and node sequence relationship are stored in reservoir, clock provides current time stamp, communication module and branch current table
Communication connection, communication module, clock, memory and ammeter are connect with controller, the control of controller and relay switch
End connection.
2. a kind of ring distribution system protective relaying device based on automatic discriminating direction according to claim 1, feature
It is,
The communication module is wireless communication module.
3. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction as described in claim 1,
It is characterized in that,
The following steps are included:
A) controller differentiates relationship between superior and subordinate according to direction of tide and node sequence relationship；
B) when detecting fault current, controller executes following judgement, if node where protective relaying device without downstream site,
Relay protection action command, disconnected node are then directly issued, and is acted to the protective relaying device sending at whole superior nodes
Signal enters step C if there are downstream sites for node where protective relaying device；
C) after waiting time T, following judgement is carried out, if receiving the relay protection dress at the downstream site of any level-one in T time
The action signal set then is latched protective relaying device, node conducting is kept, if not receiving at any downstream site in time T
The action signal of protective relaying device then issues relay protection action command, disconnected node.
4. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 3,
It is characterized in that,
In step A, judge that the method for direction of tide specifically includes:
A1) controller reads the obtained current value of ammeter measurement, controller using unique number, current value and timestamp as
Packet is sent in a broadcast manner；
A2) controller receives the packet that the protective relaying device at two side gussets is sent, and controller reads node two sides simultaneously
Branch current table value；
A3 the difference of the surveyed current value of two sides protective relaying device Yu branch current table measured value, difference and current control) are calculated separately
The protective relaying device of the closer side of the read current value of device processed, is the higher level of current protective relaying device, and difference is
The protective relaying device of negative side is the junior of current protective relaying device, and two sides difference is positive, then the relay protection fills
Set no junior's protective relaying device.
5. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 3,
It is characterized in that,
To at whole superior nodes protective relaying device issue action signal method specifically includes the following steps:
B1 after) relationship between superior and subordinate determines, each protective relaying device stores the unique number of its whole juniors protective relaying device；
B2) controller of protective relaying device reads the obtained current value of ammeter measurement, and with period t by unique number, electricity
Flow valuve and timestamp are sent in a broadcast manner as packet；
B3) controller core of protective relaying device is to relationship between superior and subordinate, if relationship between superior and subordinate checks mistake, differentiates again up and down
Grade relationship；
B4) when the protective relaying device of no junior's protective relaying device detects fault current, disconnected node, and go off the air
Packet, the continuous two period t of whole higher level's protective relaying devices of the protective relaying device do not receive the protective relaying device
The packet of broadcast, then it is assumed that have received the action signal of the protective relaying device.
6. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 3,
It is characterized in that,
Step C specifically: when the protective relaying device with junior's protective relaying device detects fault current, go off the air
Packet waits two period t, if whole juniors protective relaying device keeps broadcast message packet in two period t,
Then protective relaying device disconnected node, if there are the non-broadcast message packets of junior's protective relaying device, then in two period t
It is considered as the action signal for receiving junior's protective relaying device, latch-up protection keeps node conducting.
7. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 3,
It is characterized in that,
Further include step D) after fault current disappears, the protective relaying device at node being held on differentiates the superior and the subordinate again
Relationship, and execute step B-C；Node location is uploaded to power distribution network by communication module by the protective relaying device of node gap
Repair center.
8. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 5,
It is characterized in that,
Step B2 further include: if not receiving its junior's protective relaying device in the continuous two period t of a certain protective relaying device
Broadcast message packet, and fault current is not detected in the ammeter of the protective relaying device, then protects the relay of non-broadcast message packet
The unique number of protection unit is sent to power distribution network repair center.
9. a kind of control method of the ring distribution system protective relaying device of automatic discriminating direction according to claim 3,
It is characterized in that,
Controller also executes following steps simultaneously:
The current value for receiving the protective relaying device at the adjacent node of side calculates protective relaying device at present node and is somebody's turn to do
Protective relaying device current value obtained at the adjacent node of side and value and difference, take absolute value；It is collateral to read this
Road ammeter measured value；
If the measured value of branch current table is not equal to described and value, also it is not equal to the absolute value of the difference, then determines the branch
There is electric leakage in road, which is reported power distribution network repair center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910554443.8A CN110323724B (en) | 2019-06-25 | 2019-06-25 | Annular power distribution network relay protection device capable of automatically judging direction and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910554443.8A CN110323724B (en) | 2019-06-25 | 2019-06-25 | Annular power distribution network relay protection device capable of automatically judging direction and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110323724A true CN110323724A (en) | 2019-10-11 |
| CN110323724B CN110323724B (en) | 2022-04-19 |
Family
ID=68120209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910554443.8A Active CN110323724B (en) | 2019-06-25 | 2019-06-25 | Annular power distribution network relay protection device capable of automatically judging direction and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110323724B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844727A (en) * | 2022-07-01 | 2022-08-02 | 北京智芯微电子科技有限公司 | Switch and protection circuit, protection system thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
| CN103022993A (en) * | 2012-11-23 | 2013-04-03 | 上海交通大学 | Adaptive cascade direction interlocking relaying method based on GOOSE (Generic Object Oriented Substation Event) |
| CN104184134A (en) * | 2014-09-03 | 2014-12-03 | 广西电网公司电力科学研究院 | Distribution line bi-directional latch-up protection method based on master station decision identification |
| CN104201657A (en) * | 2014-09-03 | 2014-12-10 | 广西电网公司电力科学研究院 | Power direction judgment based bidirectional blocking protection method for distributing line |
| CN106451374A (en) * | 2016-06-30 | 2017-02-22 | 国网山东省电力公司日照供电公司 | Power distribution network bidirectional allow type protection method based on FTU role identification |
| CN109473953A (en) * | 2018-03-13 | 2019-03-15 | 国网浙江省电力公司金华供电公司 | A kind of power distribution network protective relaying device and its control method based on wireless communication |
-
2019
- 2019-06-25 CN CN201910554443.8A patent/CN110323724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
| CN103022993A (en) * | 2012-11-23 | 2013-04-03 | 上海交通大学 | Adaptive cascade direction interlocking relaying method based on GOOSE (Generic Object Oriented Substation Event) |
| CN104184134A (en) * | 2014-09-03 | 2014-12-03 | 广西电网公司电力科学研究院 | Distribution line bi-directional latch-up protection method based on master station decision identification |
| CN104201657A (en) * | 2014-09-03 | 2014-12-10 | 广西电网公司电力科学研究院 | Power direction judgment based bidirectional blocking protection method for distributing line |
| CN106451374A (en) * | 2016-06-30 | 2017-02-22 | 国网山东省电力公司日照供电公司 | Power distribution network bidirectional allow type protection method based on FTU role identification |
| CN109473953A (en) * | 2018-03-13 | 2019-03-15 | 国网浙江省电力公司金华供电公司 | A kind of power distribution network protective relaying device and its control method based on wireless communication |
Non-Patent Citations (1)
| Title |
|---|
| 窦晓峰等: "船舶环形配电网电流保护研究", 《船电技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114844727A (en) * | 2022-07-01 | 2022-08-02 | 北京智芯微电子科技有限公司 | Switch and protection circuit, protection system thereof |
| CN114844727B (en) * | 2022-07-01 | 2022-09-23 | 北京智芯微电子科技有限公司 | Switch and protection circuit, protection system thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110323724B (en) | 2022-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105866615B (en) | 10kV distribution line disconnection fault determination method based on three-phase voltage current | |
| CN103354353B (en) | Intelligent power-distribution-network whole-line quick-reacting main protection and determination system and method | |
| CN101409442B (en) | Rapid line backup protection method with reliable selection based on wide area measuring system | |
| CN103117537B (en) | Power distribution network area protection method and system | |
| CN105140894B (en) | A kind of power distribution network differential protecting method based on Phase Difference Principle | |
| CN104167808B (en) | 220kV spare power automatic switching method | |
| CN102075005B (en) | Processing method for 110KV zone automatic standby power switching action on basis of EMS (Engine Management System) system | |
| CN102611082B (en) | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network | |
| CN101741137B (en) | Network centralized emergency power supply automatic switching method | |
| CN104362599A (en) | Method for protecting low-voltage bus of intelligent substation | |
| CN106571688A (en) | Method for monitoring operation mode of direct-current system and operation states of disconnecting switches | |
| CN104242455B (en) | 110 kV substation protection and control action cooperation strategy suitable for DG (distributed generation) accessing | |
| CN203691057U (en) | Arc online monitoring and protecting system | |
| CN103683491A (en) | Multi-power accessed substation anti-islanding system | |
| CN106532683A (en) | Self-healing method of 110kV transformer station hand-in-hand power supply | |
| CN103560585B (en) | Digitized line protection measurement and control system suitable for metro industry | |
| CN111431057A (en) | Integrated intelligent ring main unit system, intelligent power distribution network and fault positioning method | |
| CN203093780U (en) | Electric locomotive ground automatic neutral section passing system based on current detection | |
| CN204497849U (en) | A kind ofly take into account measure and control device that is centralized, formula feeder automation on the spot | |
| CN101854057A (en) | Novel method for protecting subway 10 kV/35 kV ring network power supply circuit | |
| CN1323476C (en) | DC system short circuit protection device | |
| CN115051333A (en) | Differential protection and self-healing system for intelligent distribution network | |
| CN110323724A (en) | A kind of the ring distribution system protective relaying device and control method of automatic discriminating direction | |
| CN104795897A (en) | Intelligent substation configurable relay protecting method and system | |
| CN202797910U (en) | Standby self-start blocking device in 10kV power distribution room of intelligent substation |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |