CN104821661B - A kind of power information acquisition system with residual current monitoring function - Google Patents
A kind of power information acquisition system with residual current monitoring function Download PDFInfo
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- CN104821661B CN104821661B CN201510255580.3A CN201510255580A CN104821661B CN 104821661 B CN104821661 B CN 104821661B CN 201510255580 A CN201510255580 A CN 201510255580A CN 104821661 B CN104821661 B CN 104821661B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 39
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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
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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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Abstract
A kind of power information acquisition system with residual current monitoring function, including main website aspect, the total guarantor's aspect in power distribution station low-pressure side, the middle guarantor's aspect between total guarantor's aspect and user, main website aspect have the front end processor and server being connected with each other；Total guarantor's aspect has first order RCD and public transformer terminals, middle guarantor's aspect has second level RCD, residual current information and running state information are transmitted to public affairs and become acquisition terminal by second level RCD by power line carrier mode, residual current information and running state information are transmitted to public affairs and become acquisition terminal by first order RCD by 485 buses, public affairs become acquisition terminal and are communicated to connect with front end processor, for the residual current information and running state information of collection to be uploaded onto the server, and the control instruction with forwarding server can be received to control first, second level RCD action.
Description
Technical field
The present invention relates to a kind of electric power power information acquisition system.
Background technology
Power user power consumption information acquisition system is the power information of power consumer to be acquired, is processed and monitor in real time
System, realize the automatic data collection of power information, metering exception monitoring, electric energy quality monitoring, electrical energy consumption analysis and management, related believe
The functions such as breath issue, distributed energy monitoring, the information exchange of intelligent power equipment.At present, power supply enterprise has set up complete
Power information gathers installing and using for the various intelligent terminals such as system, power information acquisition terminal, intelligent electric meter, using modernization
Wireless data communication technology and computer management information system realize that voltage to power consumer, electric current, the long-range of electricity " are covered entirely
Lid ", " full collection ".However, this Electrical Safety significant data of power distribution station residual current and unrealized centralization, automation
Collection, under installation, the ruuning situation of RCDs at different levels are also in dispersion, original way to manage, remaining electricity
Installation rate, operational percentage and the ruuning situation for flowing action protector cannot also realize comprehensive remote automation monitoring management.
The content of the invention
The purpose of the present invention is directed to the deficiencies in the prior art, there is provided a kind of power information acquisition system, in original use
Increase residual current monitoring function on the basis of power utilization information collection system, realize to residual current and RCD
The remote monitoring of running status.
The purpose of the present invention is realized by following technical solution：
A kind of power information acquisition system with residual current monitoring function, including main website aspect, in power distribution station
Total guarantor's aspect of low-pressure side, the middle guarantor's aspect between total guarantor's aspect and user, it is characterised in that：Main website aspect has mutual
The front end processor and server of connection；There is total aspect of protecting the first order residual current on the low-pressure side circuit of power distribution station to move
Make protector and public transformer terminals, middle guarantor's aspect has the second level residual current for being arranged on and always protecting between aspect and user on circuit
Action protector, second level RCD is by power line carrier mode by residual current information and running status
Information transfer to public affairs become acquisition terminal, and first order RCD passes through 485 buses by residual current information and fortune
Row status information is transmitted to public affairs and becomes acquisition terminal, and public affairs become acquisition terminal and communicated to connect with front end processor, for the residue electricity that will be gathered
Stream information and running state information upload onto the server, and can receive the control instruction with forwarding server to control first,
Two grades of RCD actions.
Embodiment one：The second level RCD is arranged on the main line of middle guarantor's aspect, the second level
RCD has 485 communication interfaces and 485/ carrier converter being connected with 485 communication interfaces.
Embodiment two：The second level RCD is arranged on the main line of middle guarantor's aspect, the second level
RCD has carrier communication interface.
Embodiment three：The residual current monitoring of the second level RCD and action protection function are built-in
It is integrated in the electric energy meter of guarantor's aspect.
Further, middle guarantor's aspect is provided with the low-voltage carrier intelligent electric energy with the public transformer terminals carrier communication
Table, the second level RCD has low-voltage power line identical with low-voltage carrier intelligent electric energy meter or compatible
Carrier communication module, using or compatible communication protocol identical with low-voltage carrier intelligent electric energy meter, can with the public transformer terminals and
Low-voltage carrier intelligent electric energy meter directly enters row data communication.
Further, the second level RCD adds as the Carrier Node of low-voltage automatic reading meter system
Enter in the carrier communication network of power distribution station, full dynamic trunking networking is participated in jointly with low-voltage carrier intelligent electric energy meter, low pressure is carried
The data of ripple intelligent electric energy meter both force transfer electric energy meter, also data of the RCD of force transfer second, and
And, the data of the second RCD both force transfer same device, also data of force transfer electric energy meter.
Further, it is mounted on the first order RCD on each branch line of total guarantor's aspect.
Further, the first order residual current acting is mounted on each branch line and main line of total guarantor's aspect to protect
Shield device.
The present invention has the advantages that：
By residual current monitoring, main content brings power consumer electricity consumption information into safely with this rural electricity consumption is protected
In the management system of acquisition system, residual current monitoring, aftercurrent action protecting control function mould are increased in main website aspect
Measurement, the control information such as block, residual current data, parameter setting, the switch control of RCDs at different levels press one
Fixed number is transferred to public transformer terminals according to transmission protocol by RS-485, low voltage power line carrier local communication mode, by public transformer terminals
Remote transmission realizes that rural power grids power distribution station is always protected, middle guarantor and family protect the remote monitoring that three-level leakage is protected to main website aspect；By in
Guarantor's aspect sets two groups of Protection parameters, and whether analysis identification family can be assisted to protect installation or normal operation；Optionally, take
Disappear intermediate RCD, and protecting ammeter using leakage substitutes the intermediate monitoring device leaked and protect and protected as family.
Realize the security of rural power grid management of power use work(with residual current, RCD at different levels as core business
Can it is highly integrated, not failure activity with convenience on the premise of, it is not necessary in master device software, communication port, intelligence
On the premise of the huge construction of the aspects such as terminal, RCD input and O＆M cost, rural power grids are realized comprehensively and is matched somebody with somebody
" full collection, all standing " and " overall monitor " of radio area residual current, three-level RCD operating condition.
Second level RCD is added to power distribution station as the Carrier Node of low-voltage automatic reading meter system
In carrier communication network, full dynamic trunking networking is participated in jointly with low-voltage carrier intelligent electric energy meter, so as to increase Carrier Node number
Amount, improves the reliability of carrier wave data transmission.
Brief description of the drawings
The present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is rural power grids power distribution station residual current remote monitoring and managing system block diagram.
Fig. 2 is that rural power grids power distribution station earth leakage protective device is classified schematic view of the mounting position.
Fig. 3 is ammeter data and residual current data force transfer schematic diagram.
Specific embodiment
It is shown referring to Figures 1 and 2, a kind of power information acquisition system with residual current monitoring function, including main website
Aspect is protected at aspect, always guarantor's aspect, middle guarantor's aspect and family.
Main website aspect has the front end processor and server being connected with each other.
Total aspect of protecting is in power distribution station low-pressure side, including first order RCD and public transformer terminals, the
One-level RCD is arranged on the main line and branch line of power distribution station low-pressure side (always protecting aspect), and public transformer terminals lead to
Carrier interface is crossed to be communicated to connect with the low-voltage circuit communication connection of public distribution transforming, by 485 buses and first order non-electricity protector, led to
Cross wireless and/or wireline communication network to be communicated to connect with front end processor, first order RCD is referred to as total to be protected.
The point of incoming cables that aspect is in user, including the third level aftercurrent action protecting at subscriber's drop are protected in family
Device, third level RCD abbreviation family is protected.
Middle guarantor's aspect is between total guarantor's aspect and family guarantor's aspect, including second level RCD and low pressure
Carrier wave intelligent electric meter, protects, with following three kinds of implementation methods in second level RCD abbreviation：
Embodiment one：It is arranged on the main line of middle guarantor's aspect using second level RCD, the second level
RCD has 485 communication interfaces and 485/ carrier converter being connected with 485 communication interfaces；I.e. 485/ carries
Ripple converter+RCD, is labeled as " 485/ carrier converter+middle guarantor " in fig. 1 and 2
Embodiment two：Second level RCD is arranged on the main line of middle guarantor's aspect, and the second level is remaining
There is current operated protective device carrier communication interface, i.e. carrier leak to protect.
Embodiment three：The residual current monitoring of second level RCD and action protection function are built-in integrated
In the low-voltage carrier intelligent electric energy meter of middle guarantor's aspect, i.e. ammeter is protected in leakage.
Second level RCD is believed residual current information and running status by power line carrier mode
Breath is transmitted to public affairs and becomes acquisition terminal, and first order RCD passes through 485 buses by residual current information and operation
Status information is transmitted to public affairs and becomes acquisition terminal, and public affairs become acquisition terminal and communicated to connect with front end processor, for the residual current that will be gathered
Information and running state information upload onto the server, and can receive the control instruction with forwarding server to control first, second
Level RCD action.
Low-voltage carrier intelligent electric energy meter and public transformer terminals carrier communication, second level RCD have with it is low
The pressure identical or compatible low-voltage power line carrier communication module of carrier wave intelligent electric meter, using with low-voltage carrier intelligent electric energy meter phase
Same or compatible communication protocol, can directly enter row data communication with public transformer terminals and low-voltage carrier intelligent electric energy meter；The second level remains
Aftercurrent action protector is added in the carrier communication network of power distribution station as the Carrier Node of low-voltage automatic reading meter system, with
Low-voltage carrier intelligent electric energy meter participates in full dynamic trunking networking jointly, low-voltage carrier intelligent electric energy meter both force transfer electric energy meter
Data, the both relays of the also data of the RCD of force transfer second, also, the second RCD
The data of same device are transmitted, also the data of force transfer electric energy meter, the low-voltage automatic reading meter system is that power information gathers system
Subsystem in system.
Shown in reference picture 3, public transformer terminals (N0) be low voltage power line carrier centralized node, along power line from the near to the remote according to
The secondary multiple carrier terminal equipments of connection, wherein：RCD (N1), RCD (N4) are that the residual current with low-voltage carrier communication function is protected
Protection unit, ammeter (N2), ammeter (N3) are low-voltage carrier intelligent ammeter.It is assumed that being disturbed and carrier communication distance limitation, N0 is arrived
Carrier Node between N4 can only be communicated with adjacent nearest node, then Carrier Node electricity farthest from public transformer terminals (N0)
Table (N3), RCD (N4) cannot directly with low voltage power line carrier centralized node -- public transformer terminals (N0) communication.Due to carrier communication
System uses dynamic trunking networking technology, and according to the characteristics of topology network, each Carrier Node passes through to intercept and negotiation mechanism, automatically
Generation data transfer route table, the data of the public transformer terminals (N0) of distance Carrier Node farther out pass through relay by mean carrier node
Transmission means, from as far as closely forwarding data successively.For example：Carrier Node ammeter (N3) ammeter data (including：The electricity charge, electricity,
The data such as power, voltage, electric current) ammeter (N3), RCD (N1) node force transfers to public transformer terminals (N0) are passed sequentially through, it is remaining
Current protective device RCD (N4) residual current data (including：Residual current numerical value, Protection parameters, action situation) also successively
By ammeter (N3), RCD (N1) node force transfers to public transformer terminals (N0).
Shown in reference picture 1, main website aspect uses hardware, software, the database money of power user power consumption information acquisition system
Source as residual current remote monitoring and managing system main station system.The server of main website aspect increased residual current and remotely supervise
Management function module is surveyed, total guarantor, informationization, the automatic management of middle guarantor's aspect is realized.The front end processor of main website aspect is used《Electric power
User power utilization information acquisition system communication protocol》As Data Transport Protocol, and residual current is increased on former protocol basis
Monitoring and RCD control management contiguous items and communication protocol, described data item include：Archives, fortune
The data item of the aspects such as row data, parameter and control.
Wherein, public transformer terminals telecommunication part agreement also increases residual current monitoring and RCD control
Tubulation reason related data item and communication protocol, or transparent transmission mode is used, by RCDs at different levels operation
Measuring and control data carries out relay forwarding to long-range main website aspect；The RS-485 local communication interfaces part of public transformer terminals also increases《It is surplus
Aftercurrent action protector communication protocol》Assisted as the data transfer communications between first order RCD
View；After the carrier wave local communication interface part of public transformer terminals also increases improvement《Multi -function watt -hour meter communication protocol》As with
The Data Transport Protocol of guarantor's aspect device communication.Public transformer terminals also expand respective data storage space, same for storing and forwarding
Total guarantor, middle configuration parameter, the service data for protecting related residual current monitoring and protecting.
Wherein, in the combination unit of the 485/ carrier converter+RCD of middle guarantor's aspect, 485/ carries
Ripple converter is a kind of communication interface and Data Transport Protocol converter, is responsible for RS-485 and low voltage power line carrier physical interface
Bi-directional conversion, be responsible for《RCD communication protocol》After improvement《Multi -function watt -hour meter communication protocol》's
Data Transport Protocol is changed；It is a kind of RCD with carrier communication function that carrier leak is protected, using improvement
Afterwards《Multi -function watt -hour meter communication protocol》As Data Transport Protocol, the residue electricity using low-voltage powerline carrier communication mode
Stream action protector；Leakage protect ammeter, be it is a kind of with residual current monitoring with action protection, using improvement after《Multi-functional electricity
Can table communication protocol》As Data Transport Protocol, the carrier wave intelligent electric meter using low-voltage powerline carrier communication mode.
Protect aspect total, when exist many it is total protect when, the electrical main connecting wire relation between each total guarantor have " total-point " or
" equity " two kinds of relations, public transformer terminals are identified according to its wiring relation, parameter management and data storage, and verify management leakage
Pyroelectric monitor relaying configuration definite value parameter, makes that between each total guarantor the superior and the subordinate that aftercurrent action protecting selects sexual act can be carried out
Matching relationship.
In middle guarantor's aspect, combination unit for 485/ carrier converter+RCD or with carrier wave
The carrier leak of communication function is protected or ammeter is protected in leakage, all includes two groups of aftercurrent action protecting setting parameters, wherein, first
Group setting parameter [I1, t1] is used to trigger RCD residual current protection action in itself；Second group is adjusted
Parameter [I2, t2] triggering RCD is alarmed and forms logout, for record analysis downside drain conditions
The installation and electric leakage protected with family are just ensuring action situation.
Shown in reference picture 2, the low voltage electric network wiring system of low-voltage power distribution station area is TT systems, and it is low that low-voltage circuit has three tunnels
Extrusion line.Total guarantor's aspect is installed in a comprehensive distribution box jointly comprising a public transformer terminals and four total guarantors, public transformer terminals
Three-phase voltage loop/input power terminal be connected on public distribution low-voltage side respectively by ABCN binding posts and total protect between 0
On correspondence conductor terminals, four electrical wiring relations of first order residual current operated protective device are " total-point " relation, total to protect 0 for upper
The total guarantor of level, always guarantor 1-3 is secondary always guarantor, i.e., always protect formation aftercurrent action protecting the superior and the subordinate cooperation between 0 and total guarantor 1-3 and close
System.Each total guarantor is communicated using RS-485 bus modes with public affairs transformer terminals, and public transformer terminals are used as total residual current protected
Action protection management coordination device, realizes unified management to each total guarantor, and used as total communication host computer protected, realize it is total protect and
The storage of main website related data, relay forwarding.In platform area, the concentrator that public transformer terminals are checked meter as low pressure carrier wave, low-voltage circuit
Disperse along trunk or branch line a number of low-voltage carrier intelligent ammeter is installed, see figure ammeter 11-1n, ammeter 21-2n or
Ammeter is protected in leakage, sees that ammeter 31-3n is protected in figure leakage.
Public transformer terminals are not only the conventional power information data concentrator of carrier intelligent ammeter, are also each total guarantor, middle guarantor
Residual current monitoring and protecting data repeating device, be responsible for related data is forwarded to main website.
In middle guarantor's aspect, all kinds of middle protection devices are directly or indirectly through low voltage power line carrier mode and the load of public transformer terminals
Ripple interface enters row data communication, uses《Multi -function watt -hour meter communication protocol》As Data Transport Protocol, realize and common carrier wave
Intelligent electric meter data communication medium, communication protocol it is completely compatible.485/ carrier converter+RCD
Combination unit, carrier leak is protected, leakage protects the three types aftercurrent action protecting equipment such as ammeter as low pressure automatic data logging system
One of Carrier Node of system is added in the carrier communication network of power distribution station, and self adaptation is realized jointly with other carrier intelligent ammeters
Full dynamic trunking (networking), it is common to realize that conventional power information data, the relaying relay of residual current monitoring and protecting data are passed
It is defeated.
Middle guarantor includes three types：1st class is that the combination unit of 485/ carrier converter+RCD is made
It is middle guarantor, is mountable to enter line side in user's electrical energy metering tank, is realized by the combination unit remaining to its downside power consumer
Current monitoring and aftercurrent action protecting, middle guarantor and the relation that family guarantor is " one-to-many ", each electric power in electricity box is realized by middle guarantor
User's residual current is monitored, and realizes that the superior and the subordinate's protection aftercurrent action protecting coordinates with family guarantor, it is adaptable to will have been carried
The transformation of RS-485 communication interface type RCDs and access monitoring system；2nd class is that carrier leak protects conduct
Middle guarantor, carrier leak is protected and refers to a kind of RCD with carrier communication function, and it is acted on and first kind phase
Together；3rd class is that leakage protects ammeter as middle guarantor, installation one is changed at the total input-wire for leaking guarantor's ammeter and is protected without residual current acting
The air switch of protective function, residual current monitoring or aftercurrent action protecting are carried out by ammeter, and it is " one that leakage is protected ammeter and protected with family
To one " relation, be electric leakage reserve protection and monitoring device that its corresponding family is protected.Protected in 3 described types, because of peace
Dress place, the mode of connection, the difference of load capacity, can be divided into " being protected in three-phase " and " single-phase middle guarantor ".
Total guarantor selects the line time lagged type protector of three pole four, with the electic protection such as electric leakage, excessively stream, short circuit function and automatic weight
Closing function, with operating condition information measurement, display, storage and RS-485 communication interfaces, by RS-485 communication interfaces with
Public transformer terminals realize interconnection.It is middle to protect from prolonging with the electic protection function such as electric leakage, excessively stream, short circuit and automatic reclosing function
When type protector or leakage protect ammeter, with operating condition information measurement, display, store and line carrier communication interface, pass through
Carrier communication interface realizes interconnection with public transformer terminals.
Three-level aftercurrent action protecting parameter setting is following, and (following parameter is only for example, and can only not use the ginseng
Number)：
It is total to protect 0：Rated residual operating current 500mA, specified remaining non-operating current 250mA, act time delay 0.5s,
Automatic reclosing time 20s
It is total to protect 1-3：Rated residual operating current 200mA, specified remaining non-operating current 100mA, act time delay
0.3s, automatic reclosing time 30s
Middle guarantor's Class1-3：Rated residual operating current 50mA, specified remaining non-operating current 25mA, time delay
0.15s, automatic reclosing time 60s
Family is protected：30mA or 15mA, without time delay, without automatic reclosing function
System operation action matching relationship analysis：
1st, there is no leak current fault in platform area.Public transformer terminals are with 15 minutes, 30 minutes or 60 minutes for interval timing passes through RS-
485 or power line carrier communication mode from each total guarantor, middle guarantor collection residual current data, and upload to main website and carry out data preservation
And analysis.
2nd, platform Qu is always protected to circuit between middle guarantor and singlephase earth fault is occurred.1-3 to electricity between guarantor in its correspondence is protected when total
There is singlephase earth fault in line of force road, if earth current is less than rated residual operating current 200mA, each total guarantor is motionless
Make, main website still timing receipt to related residual current data；When earth current be more than rated residual operating current 500mA when and hold
The continuous time is more than 0.3s, and automatic trip open-circuit line is generated message by residual current data and jump by corresponding total guarantor 1-3
Lock action event information is sent to public transformer terminals in real time by RS-485 interfaces, and public transformer terminals will forward information to main website immediately；
When earth current is more than rated residual operating current 200mA and the duration is more than 0.3s, when earth current is surplus more than specified
During remaining action current 500mA and the duration be more than 0.3s, it is corresponding due to the difference of residual current acting delay time parameter
Total guarantor 1-3 will automatic trip open-circuit line first, and generate message and lead to residual current data and trip operation event information
Cross RS-485 interfaces and be sent to public transformer terminals in real time, public transformer terminals will forward information to main website immediately, it is total to protect 0 because action postpones
Time does not reach 0.5s, remains at "on" position, only when in total guarantor 1-3 because of failure itself or tripping mechanism tripping,
Total guarantor 0 is only possible to automatic trip.Total 0 or total guarantor 1-3 that protects monitors that residual current is out-of-limit and the duration meets setting first
Delay requirement after, perform automatic trip operation, public transformer terminals total will protect the total divide-shut brake protected of feedack detection according to each
Position of the switch relation, determines whether there is the event of tripping fault of bypassing the immediate leadership, and " Enable/Disable " automatic reclosing is sent to corresponding total guarantor
Lock control information, and relevant information is reported and submitted by remote data communication mode to main website.
There is leak current fault in circuit or user's electrical equipment the 3, on the downside of middle guarantor.It is middle protect be responsible for monitoring its on the downside of circuit or
The residual current situation of user's electrical equipment, and the standby RCD protected as its downside family.It is middle to protect logical
Cross its power line carrier interface timing by measured residual current data by power circuit in power line carrier communication mode
Public transformer terminals are uploaded to, then main website is uploaded to by the timing forwarding of public transformer terminals.When the residual current value for flowing through middle guarantor exceedes its volume
When determining working value and meeting delay requirement, middle guarantor's residual current protecting trip operation will be caused, disconnect its underside circuits, and according to
Default parameter, delayed automatic reclosing.Middle guarantor point, feed motion and residual current data by power circuit with power line
Carrier communication mode uploads to public transformer terminals in real time, then forwarding uploads to main website in real time by public transformer terminals.For Class1, type 2
Described middle guarantor, on the downside of its correspondence is that one or many families are protected, and residual current data are uploaded by Timing measurement, can be long-range
Distribution situation and variation tendency of the residual current in power consumer side are understood, due to the aftercurrent action protecting that middle guarantor, family are protected
Definite value and delay time have definite value differential, and the residual current numerical value that central guarantor measures continuation is moved more than the residual current that family is protected
Make protection seting value (30mA or 15mA) but during less than itself action protection setting valve (50mA), by main station system point
Analysis, can be inferred that the non-normal mounting family in a power consumer at least family on the downside of it is protected, or the family installed is stored in event
Barrier, guarantor, the long-range monitoring of family guarantor's ruuning situation in realization.For the middle guarantor described in type 3, its correspondence downside only one of which electric power
User, therefore, guarantor and family guarantor are the relations of " one-to-one " in such, i.e., the guarantor that often merely hits is only responsible to monitor a family for power consumer
Security personnel dress, ruuning situation, reduce residual current measurement range, further improve family protect installation rate, operational percentage monitoring it is accurate
Property, the accuracy of leak current fault positioning is further improved, and effectively reduce three-phase RCD protection " dead band "
Caused Electrical Safety risk.
Many total guarantors interconnect simultaneously the public transformer terminals of access, and selective aftercurrent action protecting is logical using RS-485 buses
Letter mode, real-time, public transformer terminals total to each can be protected and coordinate management, and relay forwarding always protect operating condition information with
Action message.
Middle guarantor interconnects the public transformer terminals of access using power line carrier communication mode, and middle guarantor can protect to put into operation to the family on the downside of it to be had
The monitoring of effect property, ammeter is protected as middle guarantor in particular by the 3rd class device-- leakage, can protect the monitoring for realizing " one-to-one " to family.
The above, only presently preferred embodiments of the present invention, therefore the scope of present invention implementation can not be limited with this, i.e.,
The equivalence changes made according to scope of the present invention patent and description and modification, all should still belong to what patent of the present invention covered
In the range of.
Claims (6)
1. it is a kind of power information acquisition system with residual current monitoring function, including main website aspect, low in power distribution station
Press total guarantor's aspect of side, the middle guarantor's aspect between total guarantor's aspect and user, it is characterised in that：Main website aspect have mutually interconnect
The front end processor and server for connecing；Total aspect of protecting has the first order residual current acting on the low-pressure side circuit of power distribution station
Protector and public transformer terminals, middle guarantor's aspect has to be moved installed in total second level residual current protected between aspect and user on circuit
Make protector, second level RCD is believed residual current information and running status by power line carrier mode
Breath is transmitted to public affairs and becomes acquisition terminal, and first order RCD passes through 485 buses by residual current information and operation
Status information is transmitted to public affairs and becomes acquisition terminal, and public affairs become acquisition terminal and communicated to connect with front end processor, for the residual current that will be gathered
Information and running state information upload onto the server, and can receive the control instruction with forwarding server to control first, second
Level RCD action；
Middle guarantor's aspect is provided with the low-voltage carrier intelligent electric energy meter with the public transformer terminals carrier communication, and the second level remains
Aftercurrent action protector has low-voltage power line carrier communication module identical with low-voltage carrier intelligent electric energy meter or compatible, adopts
With or compatible communication protocol identical with low-voltage carrier intelligent electric energy meter, can be with the public transformer terminals and low-voltage carrier intelligent electric energy
Table directly enters row data communication；The second level RCD as low-voltage automatic reading meter system Carrier Node
It is added in the carrier communication network of power distribution station, full dynamic trunking networking, low pressure is participated in jointly with low-voltage carrier intelligent electric energy meter
The data of carrier wave intelligent electric meter both force transfer electric energy meter, the also number of force transfer second level RCD
According to, also, second level RCD both force transfer same device data, the also number of force transfer electric energy meter
According to.
2. a kind of power information acquisition system with residual current monitoring function according to claim 1, its feature exists
In：The second level RCD is arranged on the main line of middle guarantor's aspect, and the second level residual current acting is protected
Shield utensil has 485 communication interfaces and 485/ carrier converter being connected with 485 communication interfaces.
3. a kind of power information acquisition system with residual current monitoring function according to claim 1, its feature exists
In：The second level RCD is arranged on the main line of middle guarantor's aspect, and the second level residual current acting is protected
Shield utensil has carrier communication interface.
4. a kind of power information acquisition system with residual current monitoring function according to claim 1, its feature exists
In：The residual current monitoring of the second level RCD is integrated in middle guarantor's aspect with action protection function is built-in
Electric energy meter in.
5. a kind of power information acquisition system with residual current monitoring function according to claim 1 or 2 or 3 or 4,
It is characterized in that：The first order RCD is mounted on each branch line of total guarantor's aspect.
6. a kind of power information acquisition system with residual current monitoring function according to claim 1 or 2 or 3 or 4,
It is characterized in that：The first order RCD is mounted on each branch line and main line of total guarantor's aspect.
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| CN105403742B (en) * | 2015-11-27 | 2018-03-16 | 浙江八达电子仪表有限公司 | Single-phase intelligent electric energy meter based on real-time collection residual current technology |
| CN105281346A (en) * | 2015-11-27 | 2016-01-27 | 国网重庆市电力公司电力科学研究院 | Remote rural network power distribution line reactive monitoring system |
| CN105762937A (en) * | 2016-04-26 | 2016-07-13 | 宁波三星智能电气有限公司 | Rural power grid intelligence distribution transform terminal of secondary electric leakage protection |
| CN111044844A (en) * | 2019-12-05 | 2020-04-21 | 国网辽宁省电力有限公司大连供电公司 | Power supply station area fault positioning system and method based on leakage protection device |
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