CN209608347U - New energy micro-grid system - Google Patents
New energy micro-grid system Download PDFInfo
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- CN209608347U CN209608347U CN201920649287.9U CN201920649287U CN209608347U CN 209608347 U CN209608347 U CN 209608347U CN 201920649287 U CN201920649287 U CN 201920649287U CN 209608347 U CN209608347 U CN 209608347U
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Abstract
The utility model relates to a kind of new energy micro-grid systems, including distributed generation resource, switching switch, the first DC bus, the second DC bus, third DC bus, load, energy conversion device, transformer and mixed energy storage system；One end of distributed generation resource connection switching switch, the other end for switching switch are separately connected the first DC bus and the second DC bus；First DC bus connects mixed energy storage system, and is connected to third DC bus through mixed energy storage system, and the second DC bus connects transformer, and is connected to third DC bus through transformer；Load, load with energy conversion device in parallel after connection third DC bus in parallel with energy conversion device.It is in parallel with load that above-mentioned new energy micro-grid system takes energy conversion device, and mixed energy storage system is accessed in micro-grid system, to improve efficiency of energy utilization.
Description
Technical field
The utility model relates to new energy micro-capacitance sensor technical fields, more particularly to a kind of new energy micro-grid system.
Background technique
With distributed new generate electricity development, consider by the grid-connected composition micro-capacitance sensor of grid-connected power generation system, it can be achieved that
The dependence to fossil fuel energy is reduced or got rid of, there is great economy, social effect.
However, the grid-connected power generation system capacity that micro-capacitance sensor is configured is sufficiently large, in most cases, even if by weather shadow
It rings and is fluctuated, output power still has more than needed after meeting loading demand.If taken no action to, make output work more than needed
The problems such as rate is dissolved, and is led to utilization of new energy resources low efficiency, or even is generated overvoltage overcurrent, that reduces equipment uses the longevity
Life, influences the stable operation of system.
Utility model content
Based on this, it is necessary to provide a kind of new energy micro-grid system that utilization of new energy resources is high-efficient.
A kind of new energy micro-grid system, including distributed generation resource, switching switch, the first DC bus, the second direct current mother
Line, third DC bus, load, energy conversion device, the first breaker, the second breaker, transformer and mixed energy storage system；
The distributed generation resource connects one end of the switching switch, and the other end of the switching switch is separately connected described
First DC bus and second DC bus；
First DC bus connects the mixed energy storage system, and is connected to described the through the mixed energy storage system
Three DC bus, second DC bus connects the transformer, and is connected to the third direct current mother through the transformer
Line；
The load is in parallel with the energy conversion device, connects institute after the load is in parallel with the energy conversion device
Third DC bus is stated, and the branch road of the load concatenates first breaker, the branch road of the energy conversion device
Concatenate second breaker.
New energy micro-grid system further includes third breaker in one of the embodiments, and the third breaker connects
It connects between the load and the energy conversion device.
The distributed generation resource includes at least one photovoltaic generating system in one of the embodiments,.
The distributed generation resource includes at least one wind generator system in one of the embodiments,.
The wind generator system includes blower and voltage source converter, the blower in one of the embodiments,
The exchange side of the voltage source converter is connected, the DC side of the voltage source converter connects the switching switch.
The distributed generation resource includes at least one photovoltaic generating system and at least one wind in one of the embodiments,
Force generating system.
The energy conversion device includes heater in one of the embodiments,.
The energy conversion device includes battery in one of the embodiments,.
In one of the embodiments, the mixed energy storage system include energy type energy storage device, power-type energy storage device,
First DC/DC converter, the 2nd DC/DC converter, the 3rd DC/DC converter, the 4th DC/DC converter；
The energy type energy storage device and the power-type energy storage device are in parallel, and the first DC/DC converter concatenates
On the branch road of the energy type energy storage device, the 2nd DC/DC converter is serially connected in the branch of the power-type energy storage device
On the road；
The 3rd DC/DC converter and the 4th DC/DC converter are in parallel, and the 3rd DC/DC converter
One end is separately connected the first DC/DC converter and the 2nd DC/DC converter, the 3rd DC/DC converter it is another
One end connects first DC bus, and one end of the 4th DC/DC converter is separately connected the first DC/DC converter
The third DC bus is connected with the other end of the 2nd DC/DC converter, the 4th DC/DC converter.
The energy storage device includes lithium battery, sodium-sulphur battery, flow battery and plumbic acid electricity in one of the embodiments,
Pond, the power-type energy storage device include supercapacitor, flywheel and super conductive magnetic storage energy device.
In above-mentioned new energy micro-grid system, it is in parallel with load to take energy conversion device, and connect in micro-grid system
Enter mixed energy storage system, if distributed generation resource output is excessive, converts other energy stores for electric energy more than needed, if point
Cloth power supply output not enough, then with the common powering load of mixed energy storage system, to improve efficiency of energy utilization.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the new energy micro-grid system in one embodiment；
Fig. 2 is the structural schematic diagram of the new energy micro-grid system in second embodiment；
Fig. 3 is the structural schematic diagram of the new energy micro-grid system in third embodiment；
Fig. 4 is the structural schematic diagram of the new energy micro-grid system in the 4th embodiment；
Fig. 5 is the structural schematic diagram of the new energy micro-grid system in the 5th embodiment；
Fig. 6 is the structural schematic diagram of the mixed energy storage system in an embodiment.
Specific embodiment
The application in order to facilitate understanding is described more fully the application below with reference to relevant drawings.In attached drawing
Give the preferred embodiment of the application.But the application can realize in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is makes to the more thorough of the disclosure understanding
Comprehensively.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", "horizontal", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
As shown in Figure 1, a kind of new energy micro-grid system, which includes distributed generation resource 100, switching switch S, first
DC bus L1, the second DC bus L2, third DC bus L3, load 200, energy conversion device 300, the first breaker
K1, the second breaker K2, transformer 500 and mixed energy storage system 400.Wherein, the connection of distributed generation resource 100 switches switch S's
The other end of one end, switching switch S is separately connected the first DC bus L1 and the second DC bus L2；First DC bus L1 connects
Mixed energy storage system 400 is connect, and is connected to third DC bus L3, the second DC bus L2 connection through mixed energy storage system 400
Transformer 500, and third DC bus L3 is connected to through transformer 500；Load 200 is in parallel with energy conversion device 300, load
200 it is in parallel with energy conversion device 300 after connect third DC bus L3, and load branch road concatenation the first breaker K1,
Branch road the second breaker K2 of concatenation of energy conversion device 300.
Specifically, when the output power of distributed generation resource 100 meets the electrical energy demands of load 200, switch switch S and the
Two DC bus L2 connection, the first breaker K1 closure, the second breaker K2 are disconnected, and whole electric energy of distributed generation resource 100 are used
In powering load.When the output power of distributed generation resource 100 is greater than the electrical energy demands of load 200, the first breaker K1 is closed
It closes, the second breaker K2 closure, the electric energy part of distributed generation resource 100 is used for powering load, and part electric energy is turned by energy
Changing device 300 is converted to other energy stores.When load 200 and energy conversion device 300 can not dissolve 100 institute of distributed generation resource
When exporting electric energy, part switches switch S and is connected to the first DC bus L1, then electric energy more than needed is deposited by the first DC bus L1
It stores up to mixed energy storage system 400.When the output power of distributed generation resource 100 is unable to satisfy the electrical energy demands of load 200, distribution
Formula power supply 100 and mixed energy storage system 400 provide electric energy to load 200 jointly.
It should be noted that the grid-connected power generation system capacity that micro-capacitance sensor is configured is sufficiently large, in most cases, even if
It is influenced and is fluctuated by weather, output power still has more than needed after meeting loading demand.If taken no action to, make to have more than needed
Output power dissolved, the problems such as by overvoltage overcurrent is generated, reduce the service life of equipment, or even influence system
Stable operation.And tradition adjusts new energy output and the mode of loading demand equilibrium state predominantly adjusts Generation Side output work
Rate, for example, conventional thermal power plant adjust steam turbine generator into vapour, for photovoltaic power generation, then mean to throw people or excision one
The photovoltaic panel of fixed number amount, it means that abandon a part of electric power resource, this will lead to the waste of resource.
In the present embodiment, it is in parallel with load 200 to take energy conversion device 300, and accesses mixing in micro-grid system
Energy-storage system 400 can pass through energy conversion device 300 or mixed energy storage system if distributed generation resource 100 exports excessive
Electric energy more than needed is converted other energy stores by 400, if distributed generation resource output is not enough, distributed generation resource 100 and mixed
Close energy-storage system 400 gives load 200 power supply jointly, to improve efficiency of energy utilization.
In one embodiment, as shown in Fig. 2, new energy micro-grid system further includes third breaker K3, third open circuit
Device K3 is connected between load 200 and energy conversion device 300.
In the present embodiment, third breaker K3 is used to being connected to or disconnecting the energy between energy conversion device 300 and load 200
Amount transmission.For example, causing to load when the output power of distributed generation resource 100 is insufficient or mixed energy storage system 400 breaks down
200 are unable to operate normally, then can be closed K3, are connected to energy conversion device 300 with load 200, utilize energy conversion device 300
The energy stored is that load 200 provides electric energy, to improve the stability and safety of system, and energy is made full use of to convert
The energy that device 300 is stored.
In one embodiment, as shown in figure 3, distributed generation resource 100 includes at least one photovoltaic generating system.
Specifically, referring to Fig. 3, each photovoltaic generating system is all connected with a switching switch S, the photovoltaic generating system packet
Photovoltaic array 110, DC/DC converter 120 and MPPT controller 130 are included, photovoltaic array 110 is separately connected DC/DC inverter 120
With MPPT controller 130, and DC/DC inverter 120 also with switching switch S connect.
It should be noted that MPPT (Maximum Power Point Tracking, MPPT maximum power point tracking) controller
130 are capable of the generating voltage of detecting real-time photovoltaic array 110, and track ceiling voltage current value, make photovoltaic generating system with most
High-power output.
It should be understood that ground, load-side is the access in parallel of multiple groups load 200 the using distributed consumption system and load-side
Three DC bus L3, and every group of load 200 energy conversion device 300 in parallel.
Specifically, load 200 can be that DC load or AC load are being accessed when load 200 is AC load
A DC/AC inverter need to be concatenated when DC bus L3, and the direct current of DC bus L3 is converted into exchange supply AC load.
In one embodiment, as shown in figure 4, distributed generation resource 100 includes at least one wind generator system.
Specifically, referring to fig. 4, wind generator system includes blower 140 and voltage source converter 150, and blower 140 connects
The exchange side of voltage source converter 150, the DC side connection switching switch S of voltage source converter 150.
It should be noted that voltage source converter (voltage source converter, VSC) 150 is by having
The inverter of device (such as insulated gate bipolar transistor) composition of turn-off capacity, has from commutation, black starting-up and trend and inverts
Ability.
In one embodiment, referring to Fig. 5, distributed generation resource 100 includes at least one photovoltaic generating system and at least one wind
Force generating system.
In the present embodiment, each photovoltaic generating system or each wind generator system are all connected with a switching switch S,
And the first straight edge line L1 or the second DC bus L2 is accessed by switching switch S.When the output power of distributed generation resource 100 is more than needed
When, partial power (photovoltaic generating system or wind generator system) can be connected to the first DC bus L1 by switching switch S,
And electric energy more than needed is stored using mixed energy storage system 400, avoid the wasting of resources.
In one embodiment, referring to Fig. 1 to Fig. 5, energy conversion device 300 includes heater.
Specifically, heater is for converting electrical energy into thermal energy, and is stored.
Specifically, load 200 can multiple groups heater in parallel the adjusting of multiple gears may be implemented by combination, increase electricity
The conversion accuracy and conversion range of energy.
In one embodiment, referring to Fig. 1 to Fig. 5, energy conversion device 300 includes battery.
It is to be appreciated that battery is the load of discontinuous operation, when the output electric energy of distributed generation resource 100 is more than needed,
It can be connected to the second breaker K2, by power storage more than needed in battery, when the output electric energy of distributed generation resource 100 is insufficient
When, the second breaker K2 can be disconnected.
In one embodiment, as shown in fig. 6, mixed energy storage system 400 includes energy type energy storage device 410, power-type storage
Energy device 420, the first DC/DC converter 430, the 2nd DC/DC converter 440, the 3rd DC/DC converter 450, the 4th DC/DC
Converter 460.Wherein, energy type energy storage device 410 and power-type energy storage device 420 are in parallel, and the first DC/DC converter 430
It is serially connected in the branch road of energy type energy storage device 410, the 2nd DC/DC converter 440 is serially connected in the branch of power-type energy storage device 420
On the road；3rd DC/DC converter 450 and the 4th DC/DC converter 460 are in parallel, and one end of the 3rd DC/DC converter 450 point
Not Lian Jie the first DC/DC converter 430 and the 2nd DC/DC converter 440, the other end connection the of the 3rd DC/DC converter 450
One DC bus L1, one end of the 4th DC/DC converter 460 is separately connected the first DC/DC converter 430 and the 2nd DC/DC becomes
The other end of parallel operation 440, the 4th DC/DC converter 460 connects third DC bus L3.
It should be understood that ground, when the output electric energy of distributed generation resource (photovoltaic generating system or wind generator system) is more than needed,
First DC bus L1 is connected to the 3rd DC/DC converter 450, and mixed energy storage system 400 charges at this time；In distributed generation resource
Output electric energy deficiency when, the first DC bus L1 is disconnected and the connection of the 3rd DC/DC converter 450, and third DC bus
L3 is connected to the 4th DC/DC converter 460, and mixed energy storage system 400 discharges at this time, to provide electric energy to load.
In the present embodiment, the first DC/DC converter 430, the 2nd DC/DC converter 440,450 and of the 3rd DC/DC converter
4th DC/DC converter 460 can effectively inhibit the current fluctuation of photovoltaic output or wind-powered electricity generation output to energy type energy storage device
410 and power-type energy storage device 420 impact, and output current peak of the battery in pulsating load can be substantially reduced, mentioned
The power output capacity of high mixed energy storage system 400, simple and reliable, low cost.
It should be noted that the output power due to wind power plant has randomness and fluctuation, large-scale wind power integration, meeting
Power grid is caused to impact, influences system safe and reliable operation.And the mixed energy storage system 400 of the present embodiment can be realized electric energy
Space-time translation can stabilize wind power fluctuation in Generation Side configuration mixed energy storage system 400, it is (special to reduce system spinning reserve
Refer to the generating set that the generator of normal operation adds power output to rated capacity, is given with the percents of greatest requirements in day part
Capacity out), it improves power grid and receives wind-powered electricity generation energy.
In one embodiment, referring to Fig. 6, energy type energy storage device 410 include lithium battery, sodium-sulphur battery, flow battery and
Lead-acid battery；Power-type energy storage device 420 includes supercapacitor, flywheel and super conductive magnetic storage energy device.
It should be understood that ground, the energy of the energy types energy storage device such as lithium battery, sodium-sulphur battery, flow battery and lead-acid battery are close
Spend larger, but power density is smaller and the response time is longer, the low-frequency fluctuation power for being suitble to processing energy high.Power-type accumulator
Part such as super capacitor, power density is big, and the response time is short, can frequent charge and discharge, but energy density is lower, is suitble to processing energy
Low high-frequency fluctuation power.
In above-mentioned new energy micro-grid system, it is in parallel with load 200 to take energy conversion device 300, and in micro-capacitance sensor system
Mixed energy storage system 400 is accessed in system, if distributed generation resource 100 export it is excessive, can by energy conversion device 300 or
Electric energy more than needed is converted other energy stores by mixed energy storage system 400, distributed if distributed generation resource output is not enough
Power supply 100 and mixed energy storage system 400 give load 200 power supply jointly, to improve efficiency of energy utilization.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of new energy micro-grid system, which is characterized in that including distributed generation resource, switching switch, the first DC bus, the
Two DC bus, third DC bus, load, energy conversion device, the first breaker, the second breaker, transformer and mixing
Energy-storage system；
The distributed generation resource connects one end of the switching switch, and the other end of the switching switch is separately connected described first
DC bus and second DC bus；
First DC bus connects the mixed energy storage system, and it is straight through the mixed energy storage system to be connected to the third
Bus is flowed, second DC bus connects the transformer, and is connected to the third DC bus through the transformer；
The load is in parallel with the energy conversion device, it is described load it is in parallel with the energy conversion device after connect described the
Three DC bus, and the branch road of the load concatenates first breaker, the branch road of the energy conversion device concatenates
Second breaker.
2. new energy micro-grid system according to claim 1, which is characterized in that it further include third breaker, described
Three breakers are connected between the load and the energy conversion device.
3. new energy micro-grid system according to claim 1, which is characterized in that the distributed generation resource includes at least one
A photovoltaic generating system.
4. new energy micro-grid system according to claim 1, which is characterized in that the distributed generation resource includes at least one
A wind generator system.
5. new energy micro-grid system according to claim 4, which is characterized in that the wind generator system includes blower
And voltage source converter, the blower connect the exchange side of the voltage source converter, the voltage source converter
DC side connects the switching switch.
6. new energy micro-grid system according to claim 1, which is characterized in that the distributed generation resource includes at least one
A photovoltaic generating system and at least one wind generator system.
7. new energy micro-grid system according to claim 1, which is characterized in that the energy conversion device includes heating
Device.
8. new energy micro-grid system according to claim 1, which is characterized in that the energy conversion device includes electric power storage
Pond.
9. new energy micro-grid system according to any one of claims 1 to 8, which is characterized in that the hybrid energy-storing system
System includes energy type energy storage device, power-type energy storage device, the first DC/DC converter, the 2nd DC/DC converter, the 3rd DC/DC
Converter, the 4th DC/DC converter；
The energy type energy storage device and the power-type energy storage device are in parallel, and the first DC/DC converter is serially connected in institute
The branch road of energy type energy storage device is stated, the 2nd DC/DC converter is serially connected in the branch road of the power-type energy storage device；
The 3rd DC/DC converter and the 4th DC/DC converter are in parallel, and one end of the 3rd DC/DC converter
It is separately connected the first DC/DC converter and the 2nd DC/DC converter, the other end of the 3rd DC/DC converter
First DC bus is connected, one end of the 4th DC/DC converter is separately connected the first DC/DC converter and institute
The 2nd DC/DC converter is stated, the other end of the 4th DC/DC converter connects the third DC bus.
10. new energy micro-grid system according to claim 9, which is characterized in that the energy storage device include lithium battery,
Sodium-sulphur battery, flow battery and lead-acid battery, the power-type energy storage device include supercapacitor, flywheel and super conductive magnetic storage energy
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920649287.9U CN209608347U (en) | 2019-05-07 | 2019-05-07 | New energy micro-grid system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920649287.9U CN209608347U (en) | 2019-05-07 | 2019-05-07 | New energy micro-grid system |
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| CN209608347U true CN209608347U (en) | 2019-11-08 |
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ID=68406571
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| CN201920649287.9U Expired - Fee Related CN209608347U (en) | 2019-05-07 | 2019-05-07 | New energy micro-grid system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130131A (en) * | 2019-12-18 | 2020-05-08 | 安徽天尚清洁能源科技有限公司 | Double-bus micro-grid complementary power supply system |
| CN112117752A (en) * | 2020-08-28 | 2020-12-22 | 中国电子科技集团公司第十八研究所 | Distributed power supply multi-bus network topology system |
-
2019
- 2019-05-07 CN CN201920649287.9U patent/CN209608347U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130131A (en) * | 2019-12-18 | 2020-05-08 | 安徽天尚清洁能源科技有限公司 | Double-bus micro-grid complementary power supply system |
| CN111130131B (en) * | 2019-12-18 | 2021-11-19 | 安徽天尚清洁能源科技有限公司 | Double-bus micro-grid complementary power supply system |
| CN112117752A (en) * | 2020-08-28 | 2020-12-22 | 中国电子科技集团公司第十八研究所 | Distributed power supply multi-bus network topology system |
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