CN207304024U - A kind of public line distributed power supply smart management system - Google Patents
A kind of public line distributed power supply smart management system Download PDFInfo
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- CN207304024U CN207304024U CN201721379042.6U CN201721379042U CN207304024U CN 207304024 U CN207304024 U CN 207304024U CN 201721379042 U CN201721379042 U CN 201721379042U CN 207304024 U CN207304024 U CN 207304024U
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Abstract
The utility model discloses a kind of public line distributed power supply smart management system, solve the problems, such as the problem of anti-power transmission of public line for being connected to middle and small scale power supply and electric system prepared auto restart connection cutting system main switch reduce public line power supply reliability, realize the purpose to the monitoring of public line distributed generation resource grid-connected status remote.The technical solution used for：A kind of public line distributed power supply smart management system, the public line is 220/380V shared lines, connected between the distributed generation resource and public line by conducting wire, and grid-connected switch is disposed with the conducting wire, grid-connected electric energy meter, intelligent grid connection switchs, power off sensor, service entrance switch, client's total input-wire switchs and disconnecting link, the service entrance switch is the service entrance switch with no-voltage trip automatic reclosing function, the grid-connected switch is the service entrance switch with no-voltage trip automatic reclosing function, the power-off sensor and intelligent grid connection switch are electrically connected by circuit with data collector, by wirelessly communicating between the data collector and manual terminal.
Description
Technical field
A kind of public line distributed power supply smart management system of the utility model, belongs to technical field of power systems.
Background technology
With support of the country to distributed generation resource policy, the grid-connected project of distributed generation resource develops rapidly in the recent period, especially
The medium and small distributed photovoltaic project of access public electric wire net gradually increases, and not only the method for operation reliability of network system is produced
It is raw to influence, while anti-power transmission probability increase during to public line interruption maintenance.But existing medium and small distributed generation resource is grid-connected does not have
After having information upload function, public line to have a power failure, the whether reliable off-the-line of distributed power supply system can not monitor, and give grid maintenance band
Carry out hazards.
Distributed generation resource formed isolated island and to the anti-power transmission of power failure equipments be the weight of current distributed generation resource grid connection security management
Want problem.Distributed generation resource when detecting network system decompression signal should automatically by burning natural gas distributed power apparatus off-the-line, prevent to
The anti-power transmission of power failure equipments and protection burning natural gas distributed power apparatus will not be burnt because of the mutation of the parameters such as the same period, frequency, voltage or excess load.
When distributed generation resource breaks down, distributed generation resource is not cut off in the case of grid power source off-the-line, is so being connected to distribution
Still there is power supply conveying in the regional distribution network system of power supply, be formed so-called island state.If isolated island forms rear with dividing
The distribution network load of cloth power-supply device connection, which exceedes burning natural gas distributed power apparatus capacity, will cause burning natural gas distributed power apparatus not hold
Load with charged current and burn.If distribution network load meets not less than burning natural gas distributed power apparatus capacity, voltage, frequency, the same period etc.
Condition is incorporated to, burning natural gas distributed power apparatus will be caused to continue to regional distribution network power transmission, the switchgear being connected at this time with power grid is such as
Fruit does not disconnect, and distributed power supply system can be to the anti-power transmission of system power net having had a power failure, so that can be to larger range of power distribution network
The person and equipment safety of system and the reliability of power system operation mode cause serious threat.Based on above reason, I
Be necessary to carry out necessary monitoring and management to the whole burning natural gas distributed power apparatus for being incorporated to public electric wire net by technological means, it is real
When control its grid-connected and off-the-line state, effectively control " isolated island " and " anti-power transmission " to threaten, lifting Power System Reliability and distribution
The security management and control of net.
1st, influence of the distributed generation resource to power distribution network and power system operation mode reliability.
1.1st, for the anti-power transmission of public line interruption maintenance security presence for the distributed generation resource for being connected to certain scale quantity
Threaten.
Distributed generation resource is in, the grid-connected quantity on low pressure public line gradually increases, during to public line interruption maintenance
The increase of anti-power transmission probability, however existing middle-size and small-size distributed photovoltaic is grid-connected there is no information upload function, public line to have a power failure after, point
The whether reliable off-the-line of cloth photovoltaic system can not monitor, and multiple spot hazards are brought to power distribution network maintenance.It is future, similar distributed
The small power supply project of photovoltaic project grid-connected quantity will can gradually increase on public line, it is therefore necessary to similar small power supply project
Effective, the controllable security management and control of progress, strengthen system for distribution network of power safety management, prevention thus caused personal injury,
Equipment damage accident occurs.
1.2nd, the cut-grafting of system prepared auto restart connection, which is distributed the public line of formula power supply, will cause region large-area power-cuts situation.
According to the relay protection of national grid correlation and the requirement of automatic safety device setting principle file, 110KV substations
Electric power incoming line side backup auto-activating device and the mesolow side backup auto-activating device for being connected to small power supply should possess shunt tripping small power incorporating into power network circuit
Function, ensures prepared auto restart action message.According to defined above, being connected to the public line power supply reliability of distributed generation resource will be subject to
Directly affect, large-area power-cuts situation can be caused.The reason is that：As distributed photovoltaic project access common line gradually increases,
Following all common lines of 110KV substations can nearly all be connected to photovoltaic power station, if according to file regulation pair
The public line for being connected to small power supply all realizes that prepared auto restart connection cuts small power supply function, once prepared auto restart connection cuts action and will cause to be connected to
Whole tripping of the public line of distributed generation resource without selection, directly contributes the region large-area power-cuts, and customer interrupted base
This is all medium-sized and small enterprises and urban and rural residents user, rural area production and living electricity consumption, so that cause large-scale complaint situation increase,
Power supply reliability is greatly reduced, and causes pressure and passive to power supply enterprise marketing management work, while also result in electricity sales amount loss.
Utility model content
The utility model overcomes the shortcomings of the prior art, there is provided a kind of public line distributed power supply smart pipe
Reason system, solves the problems, such as that the anti-power transmission of public line for being connected to middle and small scale power supply and electric system prepared auto restart connection cutting system master open
The problem of closing reduction public line power supply reliability, realizes the mesh to the monitoring of public line distributed generation resource grid-connected status remote
's.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of public line distributed electrical
Source intelligent management system, including grid-connected state monitoring device, the grid-connected state monitoring device include public line, disconnecting link, visitor
Family total input-wire switch, service entrance switch, power-off sensor, intelligent grid connection switch, grid-connected electric energy meter, grid-connected switch and distributed electrical
Source, the public line are 220/380V shared lines, are connected between the distributed generation resource and public line by conducting wire, and
Grid-connected switch, grid-connected electric energy meter, intelligent grid connection switch, power-off sensor, service entrance switch, Ke Huzong are disposed with the conducting wire
Service entrance switch and disconnecting link, the service entrance switch are the service entrance switch with no-voltage trip automatic reclosing function, and the grid-connected switch is
Service entrance switch with no-voltage trip automatic reclosing function, the power-off sensor and intelligent grid connection switch are adopted by circuit and data
Storage is electrically connected, by wirelessly communicating between the data collector and manual terminal.
The public line is 10KV public lines, is connected between the distributed generation resource and public line by conducting wire,
Grid-connected switch, grid-connected electric energy meter, intelligent grid connection switch, power-off sensor, client's total input-wire switch are disposed with the conducting wire
And disconnecting link, client's total input-wire switch the circuit PT being provided with the conducting wire between disconnecting link for detecting circuit no-voltage,
Be electrically connected with checkout voltage disconnection device on the circuit PT, the checkout voltage disconnection device switched with intelligent grid connection and client always into
Be electrically connected between wiretap, power-off sensor and intelligent grid connection switch, client's total input-wire switch and the data collector it
Between be electrically connected, the data collector between manual terminal and remote work station by wirelessly communicating.
The grid-connected switch joins cutting cloth power grid switch, including prepared auto restart, system side communication module, visitor for a distant place
Family side communication module and the grid-connected switches of Lian Qie, the prepared auto restart, system side communication module, customer side communication module and Lian Qie are grid-connected
Switch is sequentially connected electrically together, and is electrically connected between the prepared auto restart and the grid-connected switches of Lian Qie.
The prepared auto restart includes main transformer prepared auto restart and inlet wire prepared auto restart.
The utility model has an advantageous effect in that compared with prior art：Information can be sent to by the utility model in real time
Correlation scheduling, is realized in the distributed power supply system low cost for not possessing special optic fibre link, low-voltage distribution network automation function, association
Distribution network operation maintenance personnel is helped to strengthen Distribution network safety management.If at the same time the present apparatus can coupled system it is standby
The operation time limit hauled oneself willingly into, by whole public line whole small power supply off-the-line when prepared auto restart acts, will solve to be connected to middle and small scale electricity
The public line system prepared auto restart connection in source is cut the problem of reducing power supply reliability.To possessing the distributed generation resource of special optic fibre link
System realizes that a selectable distant place joins cutting cloth by the quick, reliable, sensitive of distributed generation resource dedicated optic fiber channel, quick-action
Formula power grid switchs, thus ensure system prepared auto restart can action message, and the outlet of the connection cutting system side no longer without selection
Switch, causes to be connected to the public line large-area power-cuts of distributed generation resource, power supply reliability reduction phenomenon.
Brief description of the drawings
The utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structure diagram of the utility model, that is, state block diagram during low pressure.
State block diagram when Fig. 2 is the utility model mesohigh.
Fig. 3 is the structure diagram of grid-connected switch in the utility model.
In figure：1 be public line, 2 be disconnecting link, 3 be client's total input-wire switch, 4 be service entrance switch, 5 be power-off sensor,
6 be intelligent grid connection switch, 7 be grid-connected electric energy meter, 8 be it is grid-connected switch, 81 be prepared auto restart, 811 be main transformer prepared auto restart, 812 be into
Line prepared auto restart, 82 be system side communication module, 83 be customer side communication module, 84 be that connection cuts grid-connected switch, 9 is distributed electrical
Source, 10 be data collector, 11 be manual terminal, 12 be circuit PT, 13 be checkout voltage disconnection device, 14 be telework
Stand.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of public line distributed power supply smart management system of the utility model, including
Grid-connected state monitoring device, the grid-connected state monitoring device include public line 1, disconnecting link 2, client's total input-wire switch 3, inlet wire
Switch 4, power-off sensor 5, intelligent grid connection switch 6, grid-connected electric energy meter 7, grid-connected switch 8 and distributed generation resource 9, the common line
Road 1 is 220/380V shared lines, is connected between the distributed generation resource 9 and public line 1 by conducting wire, and on the conducting wire according to
It is secondary to be provided with grid-connected switch 8, grid-connected electric energy meter 7, intelligent grid connection switch 6, power-off sensor 5, service entrance switch 4, client's total input-wire
Switch 3 and disconnecting link 2, the service entrance switch 4 are the service entrance switch with no-voltage trip automatic reclosing function, and the grid-connected switch 8 is
Service entrance switch with no-voltage trip automatic reclosing function, the power-off sensor 5 and intelligent grid connection switch 6 pass through circuit and data
Collector 10 is electrically connected, by wirelessly communicating between the data collector 10 and manual terminal 11.
The public line 1 is 10KV public lines, is connected between the distributed generation resource 9 and public line 1 by conducting wire
Connect, be disposed with the conducting wire it is grid-connected switch 8, grid-connected electric energy meter 7, intelligent grid connection switch 6, power-off sensor 5, client always into
Wiretap 3 and disconnecting link 2, client's total input-wire, which switchs, to be provided with the conducting wire between 3 and disconnecting link 2 for detecting circuit no-voltage
Circuit PT12, the circuit PT12 on be electrically connected with checkout voltage disconnection device 13, the checkout voltage disconnection device 13 and intelligence
It is electrically connected between grid-connected switch 6 and client's total input-wire switch 3, the power-off sensor 5 and intelligent grid connection switch 6, Ke Huzong
It is electrically connected between service entrance switch 3 and data collector 10, the data collector 10 and manual terminal 11 and telework
Stand between 14 by wirelessly communicating.
The grid-connected switch 8 joins cutting cloth power grid switch, including prepared auto restart 81, system side communication module for a distant place
82nd, customer side communication module 83 and the grid-connected switches 84 of Lian Qie, the prepared auto restart 81, system side communication module 82, customer side communication
Together with module 83 is sequentially connected electrically with the grid-connected switches 84 of Lian Qie, and it is electrically connected between the prepared auto restart 81 and the grid-connected switches 84 of Lian Qie
Connect.
The prepared auto restart 81 includes main transformer prepared auto restart 811 and inlet wire prepared auto restart 812.
For Distribution network, we have developed the grid-connected condition monitoring dress of public line distributed generation resource to the utility model
Put, which possesses monitoring distributed power supply positional information, off-the-line switching-state information, distributed generation resource voltage, electric current, power
Real time information etc..Public line power failure automatic parallel off distributed generation resource and off-the-line self-locking, carry out electro-detection auto-parallel function.Work as public affairs
When being overhauled with line outage, as long as inputting dead line designation number in terminal device, you can real-time display is connected on the common line
Commonly connected dot position information, the grid-connected three-point state information of all distributed generation resources on road, service personnel can have a power failure taiwan area
The security situation of equipment accomplishes global management and control, can provide information according to system and targetedly arrange safety measure, it is ensured that maintenance peace
Entirely.
For low-voltage network（As shown in Figure 1）, when public line has a power failure, distributed generation resource client band no-voltage trip
The service entrance switch of automatic reclosing function, the automatic disconnection of grid-connected switch, by photo-voltaic power supply off-the-line.At this time power-off sensor detect into
Breaking signal is sent to remote handset terminal or remote work station after signal by line, grid-connected switch off by data collector,
Distal end operation maintenance personnel, that is, monitoring distributed power supply client inlet wire, grid-connected on off state, maintenance circuit hour hands prevent carrying out for property
Anti- power transmission measure, ensures maintenance safety.When public line is sent a telegram here, the service entrance switch detection circuit with automatic reclosing has power supply just
Can be by setting time automatic reclosing, the grid-connected switch detection inlet wire with automatic reclosing function also can be certainly through setting time after having power supply
Dynamic circuit connector lock is grid-connected by burning natural gas distributed power apparatus.Sensor is powered off at the same time by the "on" position signal of client's service entrance switch and grid-connected
The information such as the voltage of switch, electric current are sent to remote handset terminal or remote work station, so long-range work by data collector
Photovoltaic client and net state can be grasped in real time by making personnel.
The distributed generation resource client of no communication link is met for 10KV and above T（As shown in Figure 2）, when public line has a power failure
When, client's enter line side circuit PT detection circuit no-voltages, send decompression signal to checkout voltage disconnection device, while trigger client
Service entrance switch and grid-connected switch trip, by distributed electrical source switch off-the-line.Can be according to client's load for the client to generate power for their own use
Selectable grid-connected switch of off-the-line distributed generation resource of significance level, retains service entrance switch and ensures client's power supply reliability.Switch
Switching-state information is sent to condition checkout gear remote server by private network wireless acquisition terminal and operation maintenance personnel is held
Terminal realizes remote monitoring distributed generation resource status information, and when public line recovers power transmission, distributed generation resource client is according to tune
Degree instruction is completed and net operation.
The grid-connected state monitoring device of distributed generation resource, by private network wireless acquisition terminal to distributed generation resource client inlet wire,
Grid-connected on off state is monitored in real time.When public line distributed generation resource client is more, the system can be realized whole public
The distributed generation resource grid-connected state in circuit or region monitors, and helps public line operation, service personnel to lift low-voltage distribution
The safety management of net facility.
Information can be sent to related scheduling in real time by the present apparatus, realize do not possess the distributed generation resource system of special optic fibre link
In system low cost, low-voltage distribution network automation function, assist Distribution network operation maintenance personnel to strengthen Distribution network safety
Management.If the present apparatus is capable of the operation time limit of coupled system prepared auto restart at the same time, prepared auto restart is complete by whole public line when acting
Portion's small power supply off-the-line, asking for reduction power supply reliability is cut by the public line system prepared auto restart connection for solving to be connected to middle and small scale power supply
Topic.
The utility model realizes there is selection by the quick, reliable, sensitive of distributed generation resource dedicated optic fiber channel, quick-action
Distant place connection cutting cloth power grid switch so that ensure system prepared auto restart can action message, and the no longer connection without selection
The outlet switch of cutting system side, causes to be connected to the public line large-area power-cuts of distributed generation resource, power supply reliability reduction phenomenon.
The utility model is for improving the distributed generation resource client of optical-fibre communications function（As shown in Figure 3）, when system station is standby
When hauling oneself willingly into action, backup auto-activating device sends solution column signal, triggering by communicating automation transmission channel to distal end power station main switch
The grid-connected switch of power station main switch protective device shunt tripping customer side, realizes that a distant place joins cutting cloth power supply function.Such as detect distal end point
The non-off-the-line of cloth power supply, then the total outlet switch tripping of system side is triggered, ensure the action message of system prepared auto restart.
The utility model, which is applied, opens no longer Lian Qie 110KV substations public line outlet when system prepared auto restart acts
Close, but the directly grid-connected point switch of distant place connection cutting cloth, it so can avoid prepared auto restart connection from cutting the big face of public line
Product has a power failure, and can guarantee that system prepared auto restart action message, so that the power supply reliability of General Promotion system common line.
Currently, the security risk and power system operation mode that distributed generation resource access public electric wire net brings network system
Reliability effect increasingly shows.In terms of electric network security, security management and control mesh of the network system to distributed generation resource access power grid
Before be partial to power terminal management, there is presently no clear and definite specification for the global safety management of Distribution network.Can in power grid
By in terms of property, prepared auto restart connection cuts distribution line phenomenon, and there will be universal phenomenon.Therefore, the implementation of two technologies pushes away more than
Extensively, it is possible to achieve the inexpensive distribution automation function of Distribution network distributed generation resource, is realized by this function and be distributed
Effective management and control of the formula power supply in Distribution network.Meanwhile the selectivity function that prepared auto restart connection cuts distributed generation resource is lifted,
To reduce the grid-connected reliability effect to power grid of distributed generation resource.
The utility model is explained in detail above in conjunction with embodiment, but the utility model is not limited to above-mentioned implementation
Example, within the knowledge of a person skilled in the art, can also not depart from the premise of the utility model aims
It is lower that various changes can be made.
Claims (4)
- A kind of 1. public line distributed power supply smart management system, it is characterised in that：It is described including grid-connected state monitoring device Grid-connected state monitoring device includes public line（1）, disconnecting link（2）, client's total input-wire switch（3）, service entrance switch（4）, power-off pass Sensor（5）, intelligent grid connection switch（6）, grid-connected electric energy meter（7）, grid-connected switch（8）And distributed generation resource（9）, the public line （1）For 220/380V shared lines, the distributed generation resource（9）And public line（1）Between connected by conducting wire, and the conducting wire On be disposed with grid-connected switch（8）, grid-connected electric energy meter（7）, intelligent grid connection switch（6）, power-off sensor（5）, service entrance switch （4）, client's total input-wire switch（3）And disconnecting link（2）, the service entrance switch（4）For the inlet wire with no-voltage trip automatic reclosing function Switch, the grid-connected switch（8）For the service entrance switch with no-voltage trip automatic reclosing function, the power-off sensor（5）And intelligence Can grid-connected switch（6）Pass through circuit and data collector（10）It is electrically connected, the data collector（10）And manual terminal （11）Between by wirelessly communicating.
- A kind of 2. public line distributed power supply smart management system according to claim 1, it is characterised in that：The public affairs Use circuit（1）For 10KV public lines, the distributed generation resource（9）And public line（1）Between connected by conducting wire, the conducting wire On be disposed with grid-connected switch（8）, grid-connected electric energy meter（7）, intelligent grid connection switch（6）, power-off sensor（5）, client always into Wiretap（3）And disconnecting link（2）, client's total input-wire switch（3）And disconnecting link（2）Between conducting wire on be provided with for detection line The circuit PT of road no-voltage（12）, the circuit PT（12）On be electrically connected with checkout voltage disconnection device（13）, the checkout voltage solution Array apparatus（13）Switched with intelligent grid connection（6）Switched with client's total input-wire（3）Between be electrically connected, the power-off sensor（5） Switched with intelligent grid connection（6）, client's total input-wire switch（3）And data collector（10）Between be electrically connected, the data acquisition Device（10）With manual terminal（11）And remote work station（14）Between by wirelessly communicating.
- A kind of 3. public line distributed power supply smart management system according to claim 1 or 2, it is characterised in that：Institute State grid-connected switch（8）Join cutting cloth power grid switch, including prepared auto restart for a distant place（81）, system side communication module（82）、 Customer side communication module（83）Grid-connected switch is cut with connection（84）, the prepared auto restart（81）, system side communication module（82）, customer side Communication module（83）Grid-connected switch is cut with connection（84）It is sequentially connected electrically together, and the prepared auto restart（81）Grid-connected switch is cut with connection （84）Between be electrically connected.
- A kind of 4. public line distributed power supply smart management system according to claim 3, it is characterised in that：It is described standby Haul oneself willingly into（81）Including main transformer prepared auto restart（811）With inlet wire prepared auto restart（812）.
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| CN201721379042.6U CN207304024U (en) | 2017-10-24 | 2017-10-24 | A kind of public line distributed power supply smart management system |
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| CN201721379042.6U CN207304024U (en) | 2017-10-24 | 2017-10-24 | A kind of public line distributed power supply smart management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107834591A (en) * | 2017-10-24 | 2018-03-23 | 国家电网公司 | Public line distributed power supply smart management system |
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| CN107834591A (en) * | 2017-10-24 | 2018-03-23 | 国家电网公司 | Public line distributed power supply smart management system |
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