CN206517066U - A kind of alternating current-direct current mixing distribution system containing important load - Google Patents
A kind of alternating current-direct current mixing distribution system containing important load Download PDFInfo
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- CN206517066U CN206517066U CN201720210734.1U CN201720210734U CN206517066U CN 206517066 U CN206517066 U CN 206517066U CN 201720210734 U CN201720210734 U CN 201720210734U CN 206517066 U CN206517066 U CN 206517066U
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Abstract
A kind of alternating current-direct current mixing distribution system containing important load, contains a transformer station；Contain an AC/DC two way convertor；Contain a master switch part；Contain a filter condenser；Contain at least one AC load；Distribution box containing at least one the first branch switch part of connection；Contain an electric automobile electric charging station.The electric automobile electric charging station is included：One smoothing reactor, dc bus DC bus, station internal loading, the electric automobile charging pile of at least one connection DC/DC current transformer of connection DC/AC inverter.The direct current of distributed power source, can directly be fed into AC distribution net, without setting up new line by a kind of alternating current-direct current mixing distribution system containing important load of the utility model.Operation and cost of investment have so both been saved, the advantage that power distribution network AC and DC is powered is combined again, with obvious advantage, is had broad application prospects.
Description
Technical field
The utility model is related to power distribution network transmitted power capacity increasing technique field, specifically a kind of alternating current-direct current containing important load
Mix distribution system.
Background technology
China alleviates the pressure of environmental protection, the development of power network is more conformed to economizing type society for Optimization of Energy Structure
The demand for development of meeting, power industry " 12 " plans the economy for considering the strategic and various power supply architecture of long-range power network development
Property, it is proposed that " preferential development water power, optimized development coal are electric, greatly develop nuclear power, actively push forward generation of electricity by new energy, optimum development
The policy of natural gas centralized power generation, development distributed power generation of suiting measures to local conditions ".But fast-developing in new energy distributed power generation
Meanwhile, the problem of distributed power source is incorporated into the power networks is also following, and the trend that distributed power source is fed into power distribution network is more and more brighter
It is aobvious.When distributed power source proportion is increasing, the influence to power distribution network will be increasingly severe, and to the operation of power distribution network
A series of problems, such as the problem of control brings many, such as reliability, relay protection, planning and control.
The content of the invention
For deficiencies of the prior art, the utility model solves the side that existing power distribution network conveys AC and DC
There is big cost height, quantities, long construction period and to customer impact in case, propose a kind of friendship containing important load
Direct current mixes distribution system, and the direct current of distributed power source directly can be fed into AC distribution net, new without setting up
Circuit.Operation and cost of investment have so both been saved, the advantage that power distribution network AC and DC is powered has been combined again, with more apparent
Advantage, have broad application prospects.
The technical scheme that the utility model is taken is：
A kind of alternating current-direct current mixing distribution system containing important load, contains a transformer station；Contain a two-way change of AC/DC
Flow device；Contain a master switch part；Contain a filter condenser；Contain at least one AC load；Contain at least one company
Connect the distribution box of the first branch switch part；Contain an electric automobile electric charging station.The electric automobile electric charging station is included：One
Individual smoothing reactor, dc bus DC bus, the station internal loading of connection DC/AC inverter, at least one connection
The electric automobile charging pile of DC/DC current transformers；The substation low-voltage side neutral point is connected with AC/DC two way convertors, described
Substation low-voltage side neutral point is connected with the filter condenser of AC load and the smoothing reactor of DC load；The AC/DC
Two way convertor DC side is connected with substation low-voltage side neutral point, and AC/DC two way convertors AC is connected with exchanging major network；
The DC/DC current transformers low-pressure side is connected with electric automobile charging pile, DC/DC current transformers high-pressure side and dc bus DC bus
It is connected；The DC/AC inverter acs side is connected with station internal loading, DC/AC inverter direct-flow sides and dc bus DC bus phases
Even；The master switch part is located at substation exit side, the filter condenser and DC load of master switch part and AC load it is flat
Wave reactor is connected；The first branch switch part side is connected by distribution box with AC load, and the first branch switch part is another
Side is connected with dc bus DC bus；Second branch switch part side connects collinear alternating current-direct current fed lines, and the second branch opens
Close part opposite side connection inverter side, inverter opposite side connection dc bus DC bus.
Further, the master switch part is air switch or breaker.
Further, the first branch switch part is air switch or breaker.
Further, the second branch switch part is air switch or breaker.
Further, the electric energy transmission in direct-flow distribution system is direct current energy form.
Further, electric automobile charging pile interface DC/DC current transformers are two-way, and electric automobile charging pile passes through double
To DC/DC current transformers, to the anti-power transmission energy of resident load.
Compared to the technology of existing raising distribution network line transmission line capability, a kind of friendship containing important load of the utility model
Direct current mixes distribution system, has the following advantages that：
1：The utility model need not change first wife's power network line structure, it is only necessary to upgrade electric used in existing power distribution network
Cable.Exchange and direct current energy can be transmitted by same wire, the system can transmit alterating and direct current to designated area
Afterwards, powered respectively to AC DC load.
2：Main breaker/switch and user's branch road branch circuit breaker/switch are equiped with the utility model, can be in distribution system
When system breaks down, each breaker of control on demand/switch on-off, the influence by failure to power distribution network is minimized.
3：The utility model need to only introduce a set of AC/DC transformation systems in existing distribution system, and quantities is small, realization side
Just, feasibility is high.
4：Line resource is saved, is not required to separately individually set up AC power distribution line and DC power distribution line, you can realizes and hands over
The dispatching of stream and direct current energy.
5：Mains side and load side employ quarantine measures in the utility model system, and the DC component of superposition will not shadow
The parameter of existing AC transmission system is rung, while the sending out of direct current, defeated and electricity consumption will not also be influenceed by AC system.
6：The utility model introduces DC component, treats electrical energy transportation to destination in the case where not changing line cord
Afterwards, by installing power supply of the filter condenser realization to AC load additional, realized by installing smoothing reactor additional to DC load
Power supply, the program has the advantages that not change transmission line structure, it is only necessary to additionally increase the peaceful ripple of some other filter units
Unit, this contain important load alternating current-direct current mixing distribution system, for being accessed in face of electric automobile after to power distribution network convey electricity
The diversity of energy form demand.
Brief description of the drawings
Fig. 1 is a kind of structural representation of existing alternating-current system.
Fig. 2 is alternating current-direct current mixing distribution system structural representation of the utility model containing important load.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in Fig. 2 a kind of alternating current-direct current mixing distribution system containing important load,
Contain a transformer station 1；
Contain an AC/DC two way convertor 2；
Contain a master switch part 3；
Contain a filter condenser 4；
Contain at least one AC load 8；
Distribution box 7 containing at least one the first branch switch part 6 of connection；
Containing an electric automobile electric charging station, the electric automobile electric charging station is included：
One smoothing reactor 5,
One dc bus DC bus 9,
The station internal loading 13 of one connection DC/AC inverter 11,
The electric automobile charging pile 12 of at least one connection DC/DC current transformer 10；
The low-pressure side neutral point of transformer station 1 is connected with AC/DC two way convertors 2, the low-pressure side neutral point of transformer station 1
It is connected with the filter condenser of AC load 8 and the smoothing reactor of DC load；
The DC side of AC/DC two way convertors 2 is connected with transformer station 1 low-pressure side neutral point, AC/DC two way convertors 2
AC is connected with exchanging major network；
The low-pressure side of DC/DC current transformers 10 is connected with electric automobile charging pile 12, the high-pressure side of DC/DC current transformers 10 with it is straight
Bus DC bus 9 are flowed to be connected；
The AC of DC/AC inverters 11 is connected with station internal loading 13, the DC side of DC/AC inverters 11 and dc bus
DC bus 9 are connected；
The master switch part 3 is located at the outlet side of transformer station 1, the filter condenser and direct current of master switch part 3 and AC load 8
The smoothing reactor of load is connected；
The side of first branch switch part 6 is connected by distribution box 7 with AC load 8, and the first branch switch part 6 is another
Side is connected with dc bus DC bus 9；
The side of second branch switch part 14 connects collinear alternating current-direct current fed lines, the connection of the opposite side of the second branch switch part 14
The side of inverter 15, the opposite side of inverter 15 connection dc bus DC bus 9.Collinear alternating current-direct current fed lines are：One line
AC energy and direct current energy are conveyed on road simultaneously.
The master switch part 3 is air switch or breaker.
The first branch switch part 6 is air switch or breaker.
The second branch switch part 14 is air switch or breaker.
Electric energy transmission in direct-flow distribution system is direct current energy form.
The interface DC/DC current transformers 10 of electric automobile charging pile 12 are two-way, and electric automobile charging pile 12 is by two-way
DC/DC current transformers, to the anti-power transmission energy of resident load.
The 110kV AC rectifications that AC/DC two way convertors 2 provide major network are 10kV DC, are transferred to dc bus DC
bus 9.10kV DC inversions are that 380V AC are used for station internal loading 13 by DC/AC inverters 11.DC/DC current transformers 10 will
10kV DC decompressions use for 500V DC for charging pile.Distribution box 7 uses 10kV AC decompressions for 380V AC for resident.Open circuit
Device/switch disconnects other each branch road circuits, it is ensured that power network and direct-current micro-grid are to important load in circuit failed shorted
Power supply.
Mode of operation of the present utility model has following several：
1st, when systems are functioning properly, the alternating current in exchange major network is direct current by the rectification of AC/DC two way convertors 2
Electricity, through transmission line of electricity in alternating current-direct current mixing power distribution network, is delivered to after the purpose region of DC load, after being handled through smoothing reactor
Dc bus is connected into, electric energy is supplied respectively into station internal loading 13 for DC/DC current transformers 10, DC/AC inverters 11 and electric automobile fills
Electric stake 12.
Through transmission line of electricity in alternating current-direct current mixing power distribution network, it is delivered to after the purpose region of AC load, filtered capacitor 4
Ac bus is connected into after processing, after distribution box 7 handles voltage class, supply residential electricity consumption or other AC loads.Now
Two branch switch parts 14 are off.
2nd, when the user's branch road of certain in power distribution network breaks down, the first branch switch part of guilty culprit branch road is disconnected immediately
6, fault branch is separated with distribution, other non-faulting resident branch road is not influenceed then by fault branch, and keeps normal work
Make state；After the failture evacuation of fault branch, then by controlling the first branch switch part 6, the branch road is put into distribution again
Net system, to reduce failure as far as possible to the influence with network operation.
3rd, when power distribution network breaks down, master switch part 3 is turned off, and the second branch switch part 14 is closed, containing electronic vapour
Electric automobile charging pile 12 in car charge and discharge power station, resident load can be supplied by DC/DC current transformers 10, the anti-power transmission of inverter 15
And important load, to tackle the emergencies such as failure.
In the utility model specific embodiment shown in Fig. 2, AC/DC two way convertors 2, distribution box 7 connect transformer,
DC/DC current transformers 10, the voltage class of DC/AC inverters 11 are designed and illustrated with an example, in actual applications
Voltage class can be selected and determined according to real system capacity requirement.
In summary, direct-flow distribution system of the present utility model is not changing first wife's power network line structure, and without changing
Or upgrading resident's circuit, in the case where not influenceing aborigines' load electricity consumption, by former circuit to alterating and direct current energy blending transportation,
It is good to the small, energy-conserving and environment-protective of first wife's electric line loss, reliability height, scalability to have the advantages that, and the direct current energy provided
The demand of electric automobile or the access of other DC loads to power distribution network is disclosure satisfy that, is a kind of distribution of novel AC-DC mixing
System, the characteristics of system is not limited using direct current by system angle stability improves the conveying capacity of ac transmission.
Claims (6)
1. a kind of alternating current-direct current mixing distribution system containing important load, it is characterised in that：
Contain a transformer station（1）；
Contain an AC/DC two way convertor（2）；
Contain a master switch part（3）；
Contain a filter condenser（4）；
Contain at least one AC load（8）；
Contain at least one the first branch switch part of connection（6）Distribution box（7）；
Containing an electric automobile electric charging station, the electric automobile electric charging station is included：
One smoothing reactor（5）、
One dc bus DC bus（9）、
One connection DC/AC inverter（11）Station internal loading（13）、
At least one connection DC/DC current transformer（10）Electric automobile charging pile（12）；
The transformer station（1）Low-pressure side neutral point and AC/DC two way convertors（2）It is connected, the transformer station（1）Low-pressure side is neutral
Point and AC load（8）Filter condenser be connected with the smoothing reactor of DC load；
The AC/DC two way convertors（2）DC side and transformer station（1）Low-pressure side neutral point is connected, AC/DC two way convertors
（2）AC is connected with exchanging major network；
The DC/DC current transformers（10）Low-pressure side and electric automobile charging pile（12）It is connected, DC/DC current transformers（10）High-pressure side with
Dc bus DC bus（9）It is connected；
The DC/AC inverters（11）AC and station internal loading（13）It is connected, DC/AC inverters（11）DC side is female with direct current
Line DC bus（9）It is connected；
The master switch part（3）It is located at transformer station（1）Outlet side, master switch part（3）With AC load（8）Filter condenser and
The smoothing reactor of DC load is connected；
The first branch switch part（6）Side passes through distribution box（7）With AC load（8）It is connected, the first branch switch part（6）
Opposite side and dc bus DC bus（9）It is connected；
Second branch switch part（14）Side connects collinear alternating current-direct current fed lines, the second branch switch part（14）Opposite side is connected
Inverter（15）Side, inverter（15）Opposite side connection dc bus DC bus（9）.
2. a kind of alternating current-direct current containing important load mixes distribution system according to claim 1, it is characterised in that：It is described always to open
Close part（3）For air switch or breaker.
3. a kind of alternating current-direct current containing important load mixes distribution system according to claim 1, it is characterised in that：Described first
Branch switch part（6）For air switch or breaker.
4. a kind of alternating current-direct current containing important load mixes distribution system according to claim 1, it is characterised in that：Described second
Branch switch part（14）For air switch or breaker.
5. a kind of alternating current-direct current containing important load mixes distribution system according to claim 1, it is characterised in that：DC distribution
Electric energy transmission in system is direct current energy form.
6. a kind of alternating current-direct current containing important load mixes distribution system according to claim 1, it is characterised in that：Electric automobile
Charging pile（12）Interface DC/DC current transformers（10）It is two-way, electric automobile charging pile（12）Pass through two-way DC/DC unsteady flows
Device, to the anti-power transmission energy of resident load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720210734.1U CN206517066U (en) | 2017-03-06 | 2017-03-06 | A kind of alternating current-direct current mixing distribution system containing important load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720210734.1U CN206517066U (en) | 2017-03-06 | 2017-03-06 | A kind of alternating current-direct current mixing distribution system containing important load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206517066U true CN206517066U (en) | 2017-09-22 |
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ID=59869725
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720210734.1U Expired - Fee Related CN206517066U (en) | 2017-03-06 | 2017-03-06 | A kind of alternating current-direct current mixing distribution system containing important load |
Country Status (1)
| Country | Link |
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| CN (1) | CN206517066U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786594A (en) * | 2017-03-06 | 2017-05-31 | 三峡大学 | A kind of alternating current-direct current mixing distribution system containing important load |
| CN107979167A (en) * | 2017-12-14 | 2018-05-01 | 深圳供电局有限公司 | A kind of substation's emergency power supply system |
| CN109995016A (en) * | 2019-04-10 | 2019-07-09 | 国网江苏省电力有限公司 | A kind of DC distribution host's power configuration system and method for more power supplys |
-
2017
- 2017-03-06 CN CN201720210734.1U patent/CN206517066U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786594A (en) * | 2017-03-06 | 2017-05-31 | 三峡大学 | A kind of alternating current-direct current mixing distribution system containing important load |
| CN107979167A (en) * | 2017-12-14 | 2018-05-01 | 深圳供电局有限公司 | A kind of substation's emergency power supply system |
| CN109995016A (en) * | 2019-04-10 | 2019-07-09 | 国网江苏省电力有限公司 | A kind of DC distribution host's power configuration system and method for more power supplys |
| CN109995016B (en) * | 2019-04-10 | 2022-08-19 | 国网江苏省电力有限公司 | Multi-power-supply direct-current power distribution network main power supply configuration system and method |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170922 Termination date: 20200306 |