CN110299699A - A kind of distribution protective relaying device and control method based on wireless communication - Google Patents
A kind of distribution protective relaying device and control method based on wireless communication Download PDFInfo
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- CN110299699A CN110299699A CN201910463016.9A CN201910463016A CN110299699A CN 110299699 A CN110299699 A CN 110299699A CN 201910463016 A CN201910463016 A CN 201910463016A CN 110299699 A CN110299699 A CN 110299699A
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- 238000004891 communication Methods 0.000 title claims abstract description 63
- 230000001681 protective effect Effects 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title description 9
- 230000004224 protection Effects 0.000 claims abstract description 141
- 230000000903 blocking effect Effects 0.000 claims abstract description 75
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 238000005070 sampling Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 14
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000001934 delay Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 101100236764 Caenorhabditis elegans mcu-1 gene Proteins 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical group C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 2
- 206010003830 Automatism Diseases 0.000 description 2
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Classifications
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- 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
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- H02J13/0075—
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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
- 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
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of distribution protective relaying device based on wireless communication, the active distribution line with distributed generation resource access suitable for distribution, includes overcurrent protective device, blocking protection device and line-breaker；The overcurrent protective device, blocking protection device, line-breaker are arranged on active distribution line, and the overcurrent protective device is electrically connected with blocking protection device, and blocking protection device is electrically connected with line-breaker.Beneficial effects of the present invention: present design coordinates the action policy between the superior and the subordinate's protective device by certain contact information; eliminate distribution network protection poor selectivity; adjust heavy workload and many and diverse problem; protective relaying devices at different levels use SIM card communication scheme; it solves related matching problem between protective relaying device, provides the application experience of preciousness for the safe and reliable operation of power grid.
Description
Technical field
The present invention relates to distribution relay protection fields, specifically, being related to a kind of distribution relay protection based on wireless communication
Device and control method.
Background technique
Traditional distribution protective relaying device causes to protect since distribution main line switch, block switch, branch switch are densely distributed
It protects that setting value order is complicated, cooperation is differential more, when switch trip the problem of limit for length, can not adapt to that the distribution method of operation is changeable, divides
The active type distribution that cloth power supply largely accesses.
Chinese patent, notification number: the day for announcing: CN101483337 is disclosed a kind of for power distribution network on July 15th, 2009
The dress of the fault section automatism isolation of overhead transmission line short trouble and singlephase earth fault and non-faulting section automatic recovery of power supply
It sets and method, is suitable for 3 ~ 10kV power distribution network power grid overhead transmission line.The principle of automatism isolation and automatic recovery of power supply are as follows: overhead line
Road installs more voltage-type automatic circuits and route is divided into several sections, and protective relaying device or line selection apparatus are pressed after failure occurs
Signal that faulty line outlet breaker is opened or closed automatically according to the delay time and sequence of movement that set, and with route weight
Clutch is cooperated, and determines fault section by single shot reclosing, by secondary reclosing isolated fault section, and restores non-event
Hinder section power supply.The detection terminal installation for being installed on substation simultaneously can judge automatically the section of guilty culprit, and by failure
Information is sent to scheduling backstage, while being sent to designated user with mobile phone short messages.The technology of the present invention maturation, high reliablity.
Summary of the invention
Mesh of the invention is to solve protection seting cooperation complexity in distribution network line, cooperate differential more, the switch trip time limit
Long problem proposes a kind of distribution protective relaying device and control method based on wireless communication, passes through certain contact side
Formula coordinates the action policy between the superior and the subordinate's protective device, eliminates distribution network protection poor selectivity, adjusts heavy workload and many and diverse
Problem, protective relaying devices at different levels use SIM card communication scheme, solve related matching problem between protective relaying device, for electricity
The safe and reliable operation of net provides valuable application experience.
To realize the above-mentioned technical purpose, a kind of technical solution provided by the invention is a kind of distribution based on wireless communication
Protective relaying device, the active distribution line with distributed generation resource access suitable for distribution include overcurrent protection dress
It sets, blocking protection device and line-breaker；The overcurrent protective device, blocking protection device, line-breaker are equal
It is arranged on active distribution line, the overcurrent protective device is electrically connected with blocking protection device, blocking protection device
It is electrically connected with line-breaker.In the present solution, each section route of power distribution network include an overcurrent protective device and
Blocking protection device, when electric current is more than the setting valve of overcurrent protective device, blocking protection device receives current failure letter
Number, the closure of line-breaker is controlled, while each blocking protection device is both provided with wireless communication module, by certain
The message information of frequency reception subordinate equipment each other finds faulty line and fault point in time, provides safeguard for the safety of power grid.
The overcurrent protective device includes that sampling unit, sampling comparing unit, AD conversion unit and processing are single
Member, the sampling unit are electrically connected with section line scan pickup coil side, and the output end of the input terminal and sampling unit that sample comparing unit is electrically connected
It connects, the input terminal of AD conversion unit is electrically connected with the output end of sampling comparing unit, and the input terminal and modulus of processing unit turn
Change the output end electrical connection of unit.In the present solution, sampling unit obtains section line current information, by whole with sample circuit
Definite value is compared, and is converted to the signal that processing unit can identify by AD conversion unit, processing unit judge whether be
Fault current.
The sampling unit includes the first current transformer, the input terminal and section route of first current transformer
Electrical connection；Sampling comparing unit includes 4 electric current relays, the input terminal of electric current relay and the first current transformer
Output end electrical connection；AD conversion unit is made of the first analog-to-digital conversion module, and electric current relay is electrically connected with AD conversion unit
It connects, processing unit includes single-chip microcontroller, the first analog-to-digital conversion module and monolithic mechatronics.In the present solution, current transformer with
Section route is electrically connected, and two are overcurrent protection in 4 electric current relays, other two is fast tripping protection, electric current relay
Setting valve is given unit, and the current coil of electric current relay receives the current signal of current transformer, when current signal reaches
When to current setting, electric current relay movement, processing unit receives action signal, provides judgement, identification be over-current signal also
It is quick-break signal, sends blocking protection device to.
The blocking protection device include protection act input port, protection signal input register, MCU,
Wireless communication module, memory and protection signal output port；Protection act input port is electrically connected with overcurrent protective device
It connects, protection act input port is electrically connected with protection act input register, protection act input register, wireless telecommunications mould
Block, protection act output port and memory are electrically connected with MCU respectively, and protection act output port is electrically connected with line-breaker
It connects.In the present solution, blocking protection device receives the action signal of single-chip microcontroller, by MCU through protection signal output port
Protection signal control line road short-circuiting device movement tripping is sent to line-breaker.
The blocking protection device further includes having electric current demodulating equipment, and the electric current demodulating equipment includes the second electric current
Mutual inductor, frequency-selecting module and the second analog-to-digital conversion module, second current transformer is of coupled connections with section route, described
Frequency-selecting module is electrically connected with the second current transformer, and the second analog-to-digital conversion module is electrically connected with frequency-selecting module, MCU and the second modulus
Conversion module electrical connection.In the present solution, blocking protection device receives the action signal of overcurrent protective device, detection interval route
Whether charge, higher level's blocking protection device can be assisted to judge whether to cut faulty line by junior's line-breaker
It removes.
The wireless communication module includes antenna, antenna drive module, communication data buffer, microprocessor, SIM card
Interface, SIM card and communication port, microprocessor are electrically connected by serial communication interface with MCU, and SIM card passes through SIM card
Interface is electrically connected with microprocessor, and microprocessor is connect by communication data buffer with antenna drive module, and antenna driving is driven
Dynamic model block is electrically connected with antenna.In the present solution, microprocessor receives MCU and the information of SIM card forms communication data by processing
Afterwards, it is input to communication data buffer, then, antenna drive module is sent out the communication data in communication data buffer by antenna
It sees off.
The wireless communication module further includes having GPS positioning module, and the GPS positioning module is electrically connected with microprocessor
It connects.In this case, each protective relaying device is provided with GPS positioning module, and personnel convenient to overhaul are quickly found out section route
Abort situation, improve overhaul efficiency, for power economy safe operation provide safeguard.
The blocking protection device further includes having power-off to transmit messages device, and the power-off transmitting apparatus includes power supply, message
Memory module, modulation circuit, electronic switch, signal amplification circuit and antenna, the packet storage module and modulation circuit electricity
Connection, power supply are electrically connected by electronic switch with modulation circuit, and antenna is electrically connected by signal amplification circuit with modulation circuit.This
In scheme, power supply uses condenser type power supply for modulation circuit power supply, and when section route charges, electronic switch is disconnected, section route
It is closed when no electricity；When corresponding line-breaker because higher level's blocking protection device can pass through judgement when failure is failure to actuate
The signal for powering off device sending of transmitting messages is not received in a period of time, it can judge whether failure cuts off, to issue in time
Action signal cuts off section route since the same level section, reaches excision faulty line and protects primary power distribution side apparatus
Safety.
It is a kind of suitable for a kind of control mode of the distribution protective relaying device based on wireless communication, including walk as follows
It is rapid:
S1: adjusting the action current and time delays of overcurrent protective device, by blocking protection device and overcurrent protective device into
Row number, the MAC Address of network interface card in blocking protection device will to keep records of the adjacent position of each protective device left and right sides
The number of adjacent position is stored in blocking protection device；
S2: blocking protection device monitors channel using heartbeat message, and when channel interrupt, enclosed type current protection is moved back
Out, retain traditional two-part overcurrent protection；Current value only transmits virtual value and stamps timestamp；
S3: when some distribution network line breaks down, the distribution line and adjacent each higher level's route will appear failure
Electric current, the blocking protection device of section route and each higher level's section route where the distribution line can receive overcurrent guarantor
The protection signal that protection unit is sent, at this time each blocking protection device by wireless communication module to respective higher level
The blocking protection device of track section sends signal；
S4: blocking protection self-check of device looks into its relationship between superior and subordinate information stored, if it is without junior's blocking protection device
Protection act information is then sent to line-breaker, makes line-breaker movement tripping；Junior's blocking protection fills if it exists
Set, then wait the T1 time, if waiting time without communication module receive junior's blocking protection device transmission signal or
Electric current demodulating equipment extracts the number of junior's blocking protection device transmission and is odd number or receives junior's blocking protection device
Power-off transmit messages the message of device transmission, then the line-breaker being attached thereto is latched so that route keeps clear, conversely,
Protection act information is then sent to line-breaker, makes line-breaker movement tripping, cuts off section route.
Beneficial effects of the present invention: 1, distribution network protection adjusting is convenient, succinct, has sensitivity adjusting i.e. by line end failure
Can, and each protection definite value can be set equally, solve the problems, such as that distribution the superior and the subordinate protective seletion is poor；2, can to greatly reduce higher level each
The operation time limit of protection, more quickly isolates fault point, protects the safe and stable operation of primary equipment；3, it is suitable for distributed electrical
Source route, it is therefore prevented that because of the action situation of distributed generation resource interference protection, realize distribution line quick acting, the optimal jump of failure
Lock.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of distribution protective relaying device based on wireless communication.
Fig. 2 is the flow chart of a kind of distribution protective relaying device based on wireless communication and control method.
Fig. 3 is that power distribution network typical wiring and device dispose schematic diagram.
Description of symbols in figure: 1- overcurrent protective device, 2- blocking protection device, 3- line-breaker, 11- sampling are single
Member, 12- sampling comparison unit, 13- AD conversion unit, 14- processing unit, 21- electric current demodulating equipment, 22- power off dress of transmitting messages
It sets, 23-MCU, 24- wireless communication module, 25- memory.
Specific embodiment
It is right with reference to the accompanying drawings and examples for the purpose of the present invention, technical solution and advantage is more clearly understood
The present invention is described in further detail, it should be appreciated that the specific embodiments described herein are only one kind of the invention
Most preferred embodiment, only to explain the present invention, and the scope of protection of the present invention is not limited, and those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
Embodiment: as shown in Figure 1, a kind of system structure diagram of the distribution protective relaying device based on wireless communication, is fitted
For the active distribution line with distributed generation resource access in distribution, by overcurrent protective device 1, blocking protection device 2
And 3 three parts of line-breaker composition, line-breaker 3 is arranged on active distribution line, overcurrent protective device 1 with
Blocking protection device 2 is electrically connected, and blocking protection device 2 is electrically connected with line-breaker 3；Overcurrent protective device 1 is by sampling
Unit 11, sampling comparing unit 12, AD conversion unit 13 and processing unit 14 form, and sampling unit 11 includes the first electric current
The input terminal of mutual inductor, the first current transformer is electrically connected with section route；Comparing unit 12 is sampled by 4 electric current relay groups
At two are overcurrent protection in 4 electric current relays, other two is fast tripping protection, the input terminal of electric current relay and first
The output end of current transformer is electrically connected；AD conversion unit 13 is made of the first analog-to-digital conversion module, electric current relay and mould
Number converting unit 13 is electrically connected, and processing unit 14 is single-chip microcontroller, the first analog-to-digital conversion module and monolithic mechatronics.The present embodiment
In, each section route of power distribution network includes an overcurrent protective device 1 and blocking protection device 2, Current Mutual Inductance
Device is connect with section line, and two are overcurrent protection in 4 electric current relays, other two is fast tripping protection, electric current relay
Setting valve is given unit, and the current coil of electric current relay receives the current signal of current transformer, when current signal reaches
When to current setting, electric current relay movement, processing unit 14 receives action signal, provides judgement, identification is over-current signal
Or quick-break signal, sends blocking protection device 2 to；Blocking protection device 2 receives current fault signal, and control route is disconnected
The closure of road device 3, while each blocking protection device 2 is both provided with wireless communication module 24, receives that by certain frequency
The message information of this subordinate equipment finds faulty line and fault point in time, provides safeguard for the safety of power grid.
Blocking protection device 2 is by MCU23, wireless communication module 24, memory 25, electric current demodulating equipment 21 and power-off
Device 22 of transmitting messages composition, wireless communication module 24, memory 25, electric current demodulating equipment 21 are electrically connected with MCU23 respectively, solution for the current
It adjusts device 21 and power-off device 22 of transmitting messages to be electrically connected, powers off device 22 of transmitting messages and be electrically connected with wireless communication module 24；Electric current demodulation
Device 21 is made of the second current transformer, frequency-selecting module and the second analog-to-digital conversion module, the second current transformer and section
Route is of coupled connections, and frequency-selecting module is electrically connected with the second current transformer, and the second analog-to-digital conversion module is electrically connected with frequency-selecting module,
MCU23 is electrically connected with the second analog-to-digital conversion module.In the present embodiment, blocking protection device 2 receives the dynamic of overcurrent protective device 1
Make signal, whether detection interval route charges, and higher level's blocking protection device 2 can be assisted to judge whether disconnected by junior's route
Road device 3 can cut off faulty line.
Wireless communication module 24 includes that antenna, antenna drive module, communication data buffer, microprocessor, SIM card connect
Mouth, SIM card and communication port and GPS positioning module, GPS positioning module are electrically connected with microprocessor, microprocessor
It is electrically connected by serial communication interface with MCU23, SIM card is electrically connected by SIM card interface with microprocessor, and microprocessor passes through
Communication data buffer is connect with antenna drive module, and antenna driving drive module is electrically connected with antenna.In the present embodiment, micro- place
The information of reason device reception MCU23 and SIM card is input to communication data buffer, then, day after processing forms communication data
Line drive module is sent the communication data in communication data buffer by antenna, each protective relaying device is respectively provided with
There is GPS positioning module, personnel convenient to overhaul are quickly found out the abort situation of section route, improve overhaul efficiency, are power economy
Safe operation provides safeguard.
Power-off transmitting apparatus include power supply, packet storage module, modulation circuit, electronic switch, signal amplification circuit and
Antenna, the packet storage module are electrically connected with modulation circuit, and power supply is electrically connected by electronic switch with modulation circuit, and antenna is logical
Signal amplification circuit is crossed to be electrically connected with modulation circuit.In the present embodiment, power supply uses condenser type power supply for modulation circuit power supply, area
When section route electrification, electronic switch is disconnected, and is closed when section route is without electricity；When corresponding line-breaker 3 is because failure is motionless
When making, higher level's blocking protection device 2 can be by determining not receiving the letter for powering off the sending of device 22 of transmitting messages in a period of time
Number, it can judge whether failure cuts off, to issue action signal in time, section route cut off since the same level section,
Reach excision faulty line and protects the safety of primary power distribution side apparatus.
It is a kind of suitable for a kind of control mode of the distribution protective relaying device based on wireless communication, including walk as follows
It is rapid:
S1: the action current and time delays of adjusting overcurrent protective device 1, by blocking protection device 2 and overcurrent protective device 1
It is numbered, the MAC Address of network interface card in blocking protection device 2, to keep records of the adjacent position of each protective device left and right sides,
The number of adjacent position is stored in blocking protection device 2；
S2: blocking protection device 2 monitors channel using heartbeat message, when channel interrupt, enclosed type current protection
It exits, retains traditional two-part overcurrent protection；Current value only transmits virtual value and stamps timestamp；
S3: when some distribution network line breaks down, the distribution line and adjacent each higher level's route will appear failure
Electric current, the blocking protection device 2 of section route and each higher level's section route where the distribution line can receive overcurrent
The protection signal that protective device 1 is sent, at this time each blocking protection device 2 by wireless communication module to respective
The blocking protection device 2 of higher level's track section sends signal；
S4: its relationship between superior and subordinate information for being stored of 2 self-check of blocking protection device, if it is without junior's blocking protection device
Protection act information is sent to line-breaker 3 by 2, makes the movement tripping of line-breaker 3；Junior's blocking protection if it exists
Device 2 then waits the T1 time, if receiving the signal of the transmission of junior's blocking protection device 2 without communication module in waiting time
Or electric current demodulating equipment 21 extract junior's blocking protection device 2 transmission number be odd number or receive junior's enclosed type guarantor
The power-off of protection unit 2 transmit messages device 22 transmission message, then the line-breaker 3 being attached thereto is latched so that route keep
It is unobstructed, conversely, protection act information is then sent to line-breaker 3, makes the movement tripping of line-breaker 3, cut off section line
Road.
It is illustrated in figure 3 power distribution network typical wiring and device deployment schematic diagram；10kV distribution line by 1 power transmission of substation,
Short circuit occurs at K point for stand-by heat at substation 2, is analyzed one by one protection at each switch:
No. 1 switch protection: transformer substation side is transmitted as one group of default, and 2, No. 3 switches are used as one group, and fault current, which flows through No. 3, to be opened
Protection is closed, sends out block signal and fault curre, No. 1 switch protection receives two sides block signal and current value is identical is failure to actuate；
No. 3 switch protections: 1, No. 2 switch one group, 4, No. 7 one group of switch.Fault current flows through No. 1, No. 4 switches, and two sides are sent out
Block signal, No. 3 switch protections receive two sides block signal and current value is identical is failure to actuate；
No. 4 switch protections: 3, No. 7 one group of switches, 5, No. 6 one group of switch.Fault current flows through No. 3 switches, No. 3 switch protection hairs
Signal and current value, No. 6 switch protection non-faulty currents are flowed through and are not transmitted, and No. 5 faulty electric currents of switch flow through signalling and electricity
Flow valuve, No. 4 switch protections receive two sides block signal, but because the current value of fault current and No. 5 switch transmission is greater than threshold value
(can adjust), movement excision failure.
If mode is switched from 2 power transmission of substation, in same local failure, it can realize that No. 6 switches are protected based on the above principles
Protect fast trip.
The upper specific embodiment is a kind of distribution protective relaying device and control based on wireless communication of the present invention
The better embodiment of method, limits specific implementation range of the invention not with this, and the scope of the present invention includes being not limited to
Present embodiment, equivalence changes made by all shape, structures according to the present invention are within the scope of the invention.
Claims (9)
1. a kind of distribution protective relaying device based on wireless communication, the active with distributed generation resource access suitable for distribution
Type distribution line, it is characterised in that: include overcurrent protective device, blocking protection device and line-breaker；The mistake
Protective device, blocking protection device are flowed, line-breaker is arranged on active distribution line, the overcurrent protective device
It is electrically connected with blocking protection device, blocking protection device is electrically connected with line-breaker.
2. a kind of distribution protective relaying device based on wireless communication according to claim 1, it is characterised in that: described
Overcurrent protective device includes sampling unit, sampling comparing unit, AD conversion unit and processing unit, the sampling unit
It is electrically connected with section bus end, the input terminal for sampling comparing unit is electrically connected with the output end of sampling unit, AD conversion unit
Input terminal be electrically connected with the output end of sampling comparing unit, the output end of the input terminal of processing unit and AD conversion unit is electric
Connection.
3. a kind of distribution protective relaying device based on wireless communication according to claim 2, it is characterised in that: described
Sampling unit includes the first current transformer, and the input terminal of first current transformer is electrically connected with section bus；Sampling rate
It include 4 electric current relays compared with unit, the input terminal of electric current relay is electrically connected with the output end of the first current transformer；
AD conversion unit is made of the first analog-to-digital conversion module, and electric current relay is electrically connected with AD conversion unit, processing unit packet
MCU1 is included, the first analog-to-digital conversion module is electrically connected with MCU1.
4. a kind of distribution protective relaying device based on wireless communication according to claim 1, it is characterised in that: described to close
Locking-type protective device include protection act input port, protection signal input register, MCU2, wireless communication module,
Memory and protection signal output port；Protection act input port is electrically connected with overcurrent protective device, and protection act is defeated
Inbound port is electrically connected with protection act input register, protection act input register, wireless communication module, protection act output
Port and memory are electrically connected with MCU2 respectively, and protection act output port is electrically connected with line-breaker.
5. a kind of distribution protective relaying device based on wireless communication according to claim 4, it is characterised in that: described
The blocking protection device further includes having electric current demodulating equipment, the electric current demodulating equipment include the second current transformer,
Frequency-selecting module and the second analog-to-digital conversion module, second current transformer are of coupled connections with section bus, the frequency-selecting mould
Block is electrically connected with the second current transformer, and the second analog-to-digital conversion module is electrically connected with frequency-selecting module, MCU2 and the second analog-to-digital conversion
Module electrical connection.
6. a kind of distribution protective relaying device based on wireless communication according to claim 4 or 5, it is characterised in that: institute
Stating wireless communication module includes antenna, antenna drive module, communication data buffer, microprocessor, SIM card interface, SIM card
And communication port, microprocessor are electrically connected by serial communication interface with MCU2, SIM card pass through SIM card interface with it is micro-
Processor electrical connection, microprocessor connects by communication data buffer with antenna drive module, antenna driving drive module and
Antenna electrical connection.
7. a kind of distribution protective relaying device based on wireless communication according to claim 6, it is characterised in that: described
Wireless communication module further includes having GPS positioning module, and the GPS positioning module is electrically connected with microprocessor.
8. a kind of distribution protective relaying device based on wireless communication according to claim 1 or 4, it is characterised in that: institute
Stating blocking protection device further includes having power-off to transmit messages device, and the power-off transmitting apparatus includes power supply, packet storage module, adjusts
Circuit, electronic switch, signal amplification circuit and antenna processed, the packet storage module are electrically connected with modulation circuit, and power supply is logical
It crosses electronic switch to be electrically connected with modulation circuit, antenna is electrically connected by signal amplification circuit with modulation circuit.
9. a kind of control mode is suitable for a kind of distribution protective relaying device based on wireless communication as claimed in claim 8,
It is characterized by comprising following steps:
S1: adjusting the action current and time delays of overcurrent protective device, by blocking protection device and overcurrent protective device into
Row number, the MAC Address of network interface card in blocking protection device will to keep records of the adjacent position of each protective device left and right sides
The number of adjacent position is stored in blocking protection device；
S2: blocking protection device monitors channel using heartbeat message, and when channel interrupt, enclosed type current protection is moved back
Out, retain traditional two-part overcurrent protection；Current value only transmits virtual value and stamps timestamp；
S3: when some distribution network line breaks down, the distribution line and adjacent each higher level's route will appear failure
Electric current, the blocking protection device of section route and each higher level's section route where the distribution line can receive overcurrent guarantor
The protection signal that protection unit is sent, at this time each blocking protection device by wireless communication module to respective higher level
The blocking protection device of track section sends signal；
S4: blocking protection self-check of device looks into its relationship between superior and subordinate information stored, if it is without junior's blocking protection device
Protection act information is then sent to line-breaker, makes line-breaker movement tripping；Junior's blocking protection fills if it exists
Set, then wait the T1 time, if waiting time without communication module receive junior's blocking protection device transmission signal or
Electric current demodulating equipment extracts the number of junior's blocking protection device transmission and is odd number or receives junior's blocking protection device
Power-off transmit messages the message of device transmission, then the line-breaker being attached thereto is latched so that route keeps clear, conversely,
Protection act information is then sent to line-breaker, makes line-breaker movement tripping, cuts off section route.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| 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 |
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| CN202488106U (en) * | 2012-02-24 | 2012-10-10 | 常熟开关制造有限公司(原常熟开关厂） | Comprehensive protecting and monitoring device of microcomputer |
| WO2014053174A1 (en) * | 2012-10-03 | 2014-04-10 | Abb Technology Ltd | Method for sensing a fault in a power system based on travelling wave currents |
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Application publication date: 20191001 |