CN207910489U - A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption - Google Patents
A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption Download PDFInfo
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- CN207910489U CN207910489U CN201820027624.6U CN201820027624U CN207910489U CN 207910489 U CN207910489 U CN 207910489U CN 201820027624 U CN201820027624 U CN 201820027624U CN 207910489 U CN207910489 U CN 207910489U
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Abstract
A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption, including：At least one wind power plant, at least one photo-voltaic power generation station, at least one large-capacity power transformation system, at least one DC/DC converters, an ac bus I, a DC bus I, one wind-powered electricity generation conveys special line, one photoelectricity conveys special line, at least two microgrid units, a system-level control centre；Then the wind power plant is conveyed special line by wind-powered electricity generation and electric energy is transmitted in each microgrid unit by large-capacity power transformation system incoming transport busbar I；The photo-voltaic power generation station accesses DC bus I by DC/DC converters, and then conveying special line by photoelectricity is transmitted to electric energy in each microgrid unit.The not strong micro-capacitance sensor unit of multiple new energy digestion capabilities is carried out networking by the utility model, using multilayer control structure, make full use of wind/light complementary, the consumption for not being only large capacity wind-powered electricity generation provides support, meet increase-volume requirement of the electric vehicle to power grid, various regenerative resources can also be maximally utilised, influence of the new energy consumption to bulk power grid is reduced, improve the reliability and stability of system.
Description
Technical field
The utility model belongs to micro-capacitance sensor technical field, and in particular to a kind of friendship suitable for high-power wind/photoelectricity consumption
Direct current mixes micro-grid system.
Background technology
In recent years, in electric system worldwide, each power generation mode is to the contribution proportion of gross generation continuous
Change, generation of electricity by new energy amount proportion in gross generation is gradually increasing, and has continuous upward trend.At the same time, electric
The development of electrical automobile is paid attention to by various countries, and electric vehicle relevant policies are also seasonable and give birth to.Therefore, greatly develop generation of electricity by new energy and
Electric vehicle replaces traditional thermal power generation, with the electric vehicle of zero-emission with the wind-force that there are no pollution to the environment, photovoltaic generation
Conventional fuel oil automobile is substituted, is finally energy crisis, the solution of greenhouse effects, the global problems such as atmosphere pollution is made an effort
This theory becomes the original intention and guiding theory of the policies of various countries.However, regenerative resource has intermittent, unstability, it is various
Generation of electricity by new energy property difference is very big, and how the electric energy sent out using new energy is dissolved, and urgent problem to be solved is become.For
For the development of electric vehicle, large-scale electric vehicle charging and conversion electric certainly will increase substantially network load, not only to power grid shape
At greater impact, new requirement is also proposed to net capacity.The energy provided which forms generation of electricity by new energy cannot fill
Point utilize and electric automobile load to net capacity proposition requirements at the higher level situation.For this problem, it is thus proposed that utilize
Generation of electricity by new energy meets the needs of electric automobile load is to electric energy, and distributed power generation and electric vehicle charging load are included in
Among micro-capacitance sensor, this good thinking solved the problems, such as of can yet be regarded as one, still, single micro-capacitance sensor run inertia is small, poor robustness,
Pattern is more, power supply characteristic difference is big, does not have stronger new energy digestion capability, it is also difficult to stabilize wind power fluctuation pair
Impact caused by power grid and influence, so the problem is still among seeking solution.
Invention content
For deficiencies of the prior art, to solve the consumption of high-power wind turbine difficulty, electric vehicle charging load pair
The problems such as distribution capacity and high power generation capacity requirement, the utility model proposes a kind of friendships suitable for high-power wind/photoelectricity consumption
Direct current mixes micro-grid system, the not strong micro-capacitance sensor unit of multiple new energy digestion capabilities is carried out networking, using multilayer
Control structure makes full use of wind/light complementary, and only the consumption of large capacity wind-powered electricity generation does not provide support, meets electric vehicle to power grid
Increase-volume requirement, moreover it is possible to maximally utilise various regenerative resources, reduce new energy and dissolve influence to bulk power grid, carry
The high reliability and stability of system.
The technical solution that the utility model is taken is：
A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption, including：
At least one wind power plant,
At least one photo-voltaic power generation station,
At least one large-capacity power transformation system,
At least one DC/DC converters,
One ac bus I,
One DC bus I,
One wind-powered electricity generation conveys special line,
One photoelectricity conveys special line,
At least two microgrid units,
One system-level control centre；
For the wind power plant by large-capacity power transformation system incoming transport busbar I, then conveying special line by wind-powered electricity generation will
Electric energy is transmitted in each microgrid unit；
The photo-voltaic power generation station accesses DC bus I by DC/DC converters, then conveys special line by electric energy by photoelectricity
It is transmitted in each microgrid unit.
The microgrid unit includes：
One DC/DC buck converter,
One step-down transformer,
One microgrid cell scheduling center being made of three breaker/switches and a two-way AC/DC converter,
One ac bus II,
One DC bus II,
At least one distributed generation unit,
At least one AC load,
At least two DC/DC converters,
At least two two-way DC/DC converters,
At least one fuel cell,
At least one photovoltaic module,
At least one energy-storage system,
At least one electric vehicle charge and discharge stake,
At least one DC load；
Photoelectricity convey private line access DC/DC buck converters, electric energy after DC/DC buck converters are handled,
It is connected with the DC bus II of microgrid unit by the first breaker/switch；
The microgrid unit is connected by the second breaker/switch with bulk power grid；
Wind-powered electricity generation conveying special line end is connected to step-down transformer, after reducing wind-powered electricity generation voltage class, then passes through third open circuit
Device/switch is connected with microgrid unit；
The two-way AC/DC converters at microgrid cell scheduling center be connected to ac bus II and DC bus II it
Between, realize transformation of electrical energy and Double wire transmission；
The distributed generation unit and AC load are connected with ac bus II；
The fuel cell accesses DC bus II by the first DC/DC converters；
The photovoltaic module accesses DC bus II by the 2nd DC/DC converters；
The energy-storage system is connected by the first two-way DC/DC converters with DC bus II；
The electric vehicle charge and discharge stake accesses DC bus II by the second two-way DC/DC converters；
The system-level control centre is connected with the microgrid cell scheduling center in each microgrid unit, realizes system-level tune
Control；
Microgrid cell scheduling center and system-level control centre, wind-powered electricity generation conveying special line, photoelectricity conveying special line, big electricity
Net, ac bus II, DC bus II are connected.
System-level control centre is used to coordinate the ratio of each microgrid unit consumption generation of electricity by new energy power, mainly by communicating
Module and data processing module composition, receive the quantity of state of each microgrid unit by communication module, then by data processing module
The dispatch command of each microgrid unit under current state is calculated, these dispatch commands are finally transmitted to microgrid by communication module
Unit.
A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption of the utility model, has
Following advantage：
1, the utility model can solve the problems, such as that high-power wind turbine difficulty dissolves, and reduce wind power plant abandons wind rate, while can fill
Divide using wind/light complementation, solves the problems, such as that electric vehicle accesses the increase-volume proposed to net capacity on a large scale.
2, multiple microgrid units are carried out networking by the utility model, have ac bus and DC bus concurrently, and be equipped with wind-powered electricity generation
It conveys special line and photoelectricity conveys special line, constitute the group network system of a various dimensions, more control layers, improve system to wind/photoelectricity
Digestion capability and maintain power grid internal energy dynamic equilibrium ability.
3, the utility model can enhance load and all kinds of points using multi-source, alternating current-direct current mixed mode multilayer scheduling, netted more
The flexibility of cloth generator unit access and feasibility, can be improved energy conversion efficiency and energy utilization rate.
Description of the drawings
Fig. 1 is a kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption of the utility model
The structural schematic diagram of one embodiment.
Fig. 2 is the structural schematic diagram for each one example of microgrid unit that micro-grid is constituted in the utility model.
Fig. 3 is the structural schematic diagram that large-capacity power transformation series unifies example in the utility model.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption, including
At least one wind power plant 1, at least one photo-voltaic power generation station 2, at least one large-capacity power transformation system 3, at least one DC/DC
Converter 4, an ac bus I 5, a DC bus I 6, a wind-powered electricity generation convey special line 7, and a photoelectricity conveys special line 8, until
Few two microgrid units 9, a system-level control centre 10.Each wind power plant 1 ... within the scope of certain space, wind power plant m are equal
It can be incorporated to ac bus I 5 by large-capacity power transformation system 3, the alternating current that the distributed generation systems of other forms is sent out
Incoming transport busbar I 5 can also be facilitated；And each photo-voltaic power generation station 1 ... of certain space range, photo-voltaic power generation station n can lead to
It crosses DC/DC converters and is incorporated to DC bus I 6, the direct current that the distributed generation system of other forms is sent out can also conveniently connect
Enter DC bus I 6.The concrete structure example of the large-capacity power transformation system 3 is as shown in Figure 3；The wind power plant 1 is logical
After 3 incoming transport busbar I 5 of excess capacity power conversion system, then special line 7 is conveyed by wind-powered electricity generation, electric energy is transmitted to each microgrid
In unit 9；After the photo-voltaic power generation station 2 accesses DC bus I 6 by DC/DC converters 4, conveying special line 8 by photoelectricity will
Electric energy is transmitted in each microgrid unit 9；Energy adjustment and control between multiple microgrid units 9 are by system-level
Control centre 10 realizes.
As shown in Fig. 2, the microgrid unit is the concrete structure of the microgrid unit 9 in Fig. 1, including a DC/DC
Buck converter 31, a step-down transformer 30, by the first breaker/switch 12, the second breaker/switch 13, third open circuit
The microgrid cell scheduling center 11 of device/switch 14 and two-way AC/DC converters 15 composition, an ac bus II 16, one straight
Flow busbar II 17, at least one distributed generation unit 18, at least one AC load 19, at least two DC/DC converters：The
One DC/DC converters 20, the 2nd DC/DC converters 22.At least two two-way DC/DC converters：First two-way DC/DC converters
24, the second two-way DC/DC converters 26.At least one fuel cell 21, at least one photovoltaic module 23, at least one energy storage system
System 25, at least one electric vehicle charge and discharge stake 27, at least one DC load 28.7 end of wind-powered electricity generation conveying special line described in Fig. 1
It is terminated with step-down transformer 30, after reducing wind-powered electricity generation voltage class, then passes through the third breaker/switch 14 and microgrid list in Fig. 2
Member 9 is connected；8 end of photoelectricity conveying special line described in Fig. 1 is connected to DC/DC buck converters, by photoelectricity conveying special line transmission
After photoelectricity carries out power converter, it is connected with microgrid unit 9 by the first breaker described in Fig. 2/switch 12；The microgrid
Unit 9 is connected by the second breaker/switch 13 with bulk power grid 29；Two-way AC/ in the microgrid cell scheduling center 11
DC converters 15 are connected between ac bus II 16 and DC bus II 17, and the conversion for alternating current and direct current is carried with transmission
For channel；The ac bus II 16 is connected with distributed generation unit 18, receives the electricity that distributed generation unit 18 provides
Energy；The ac bus II 16 is connected with AC load 19, and electric energy is provided for AC load 19；The fuel cell 21 is logical
It crosses the first DC/DC converters 20 with DC bus II 17 to be connected, it is possible to provide direct current energy；The photovoltaic module 23 is microgrid list
The component part of first internal small-scale photovoltaic generating system for including, it passes through the 2nd DC/DC converters 22 and DC bus II
17 are connected；The energy-storage system 25 is connected by the first two-way DC/DC converters 24 with DC bus II 17, and it is equal to play energy
The effect that weighing apparatus is adjusted；The electric vehicle charge and discharge stake 27 passes through the second two-way DC/DC converters 26 and DC bus II 17
It is connected, electric energy can be not only drawn from system and is used for electric vehicle, moreover it is possible to discharges electric vehicle in system capacity deficiency and store
The electric energy of battery is system power supply, participates in system capacity well-balanced adjustment.
Fig. 3 show an exemplary construction schematic diagram of the large-capacity power transformation system 3 in Fig. 1, including large capacity AC/AC
33 two parts of converter 32 and step-up transformer.The electric energy that the wind power plant 1 is sent out first passes through large capacity AC/AC current transformers
32 are handled, and are boosted using step-up transformer 33, and ac bus I 5 is then incorporated into.
Claims (2)
1. a kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption, it is characterised in that including：
At least one wind power plant（1）,
At least one photo-voltaic power generation station（2）,
At least one large-capacity power transformation system（3）,
At least one DC/DC converters（4）,
One ac bus I（5）,
One DC bus I（6）,
One wind-powered electricity generation conveys special line（7）,
One photoelectricity conveys special line（8）,
At least two microgrid units（9）,
One system-level control centre（10）；
The wind power plant（1）Pass through large-capacity power transformation system（3）Incoming transport busbar I（5）, then conveyed by wind-powered electricity generation special
Line（7）Electric energy is transmitted to each microgrid unit（9）In；
The photo-voltaic power generation station（2）Pass through DC/DC converters（4）Access DC bus I（6）, special line is then conveyed by photoelectricity
（8）Electric energy is transmitted to each microgrid unit（9）In.
2. a kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption according to claim 1,
It is characterized in that：The microgrid unit（9）Including：
One DC/DC buck converter（31）,
One step-down transformer（30）,
One by three breaker/switches and a two-way AC/DC converter（15）The microgrid cell scheduling center of composition（11）,
One ac bus II（16）,
One DC bus II（17）,
At least one distributed generation unit（18）,
At least one AC load（19）,
At least two DC/DC converters,
At least two two-way DC/DC converters,
At least one fuel cell（21）,
At least one photovoltaic module（23）,
At least one energy-storage system（25）,
At least one electric vehicle charge and discharge stake（27）,
At least one DC load（28）；
Photoelectricity conveys special line（8）Connect DC/DC buck converters（31）, electric energy is by DC/DC buck converters（31）It carries out
After processing, pass through the first breaker/switch（12）With microgrid unit（9）DC bus II（17）It is connected；
The microgrid unit（9）Pass through the second breaker/switch（13）With bulk power grid（29）It is connected；
The wind-powered electricity generation conveys special line（7）End is connected to step-down transformer（30）, after reducing wind-powered electricity generation voltage class, then it is disconnected by third
Road device/switch（14）With microgrid unit（9）It is connected；
Microgrid cell scheduling center（11）Two-way AC/DC converters（15）It is connected to ac bus II（16）With direct current mother
Line II（17）Between, realize transformation of electrical energy and Double wire transmission；
The distributed generation unit（18）And AC load（19）With ac bus II（16）It is connected；
The fuel cell（21）Pass through the first DC/DC converters（20）Access DC bus II（17）；
The photovoltaic module（23）Pass through the 2nd DC/DC converters（22）Access DC bus II（17）；
The energy-storage system（25）Pass through the first two-way DC/DC converters（24）With DC bus II（17）It is connected；
The electric vehicle charge and discharge stake（27）Pass through the second two-way DC/DC converters（26）Access DC bus II（17）；
The system-level control centre（10）With the microgrid cell scheduling center in each microgrid unit（11）It is connected, realizes system-level
Regulation and control；
Microgrid cell scheduling center（11）With system-level control centre（10）, wind-powered electricity generation convey special line（7）, photoelectricity convey special line
（8）, bulk power grid（29）, ac bus II（16）, DC bus II（17）It is connected.
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| CN201820027624.6U CN207910489U (en) | 2018-01-08 | 2018-01-08 | A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054782A (en) * | 2018-01-08 | 2018-05-18 | 三峡大学 | A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108054782A (en) * | 2018-01-08 | 2018-05-18 | 三峡大学 | A kind of alternating current-direct current mixing micro-capacitance sensor group network system suitable for high-power wind/photoelectricity consumption |
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