CN207732453U - A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system - Google Patents
A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system Download PDFInfo
- Publication number
- CN207732453U CN207732453U CN201721847396.9U CN201721847396U CN207732453U CN 207732453 U CN207732453 U CN 207732453U CN 201721847396 U CN201721847396 U CN 201721847396U CN 207732453 U CN207732453 U CN 207732453U
- Authority
- CN
- China
- Prior art keywords
- inverters
- frequency modulation
- storage capacitor
- energy
- storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The utility model discloses a kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system, which includes several photovoltaic arrays, MPPT header boxs corresponding with photovoltaic array, DC/AC inverters and storage capacitor.The storage capacitor is articulated on the DC bus between MPPT header boxs and DC/AC inverters, it is supported using storage capacitor as energy, it can inhibit the frequency fluctuation in Power system dynamic process, improve the reliability of photovoltaic inversion energy-storage system, while enhance the stability of electric system.The energy that DC/AC inverters frequency modulation needs in the utility model the natural causes such as is not illuminated by the light and influences both from storage capacitor, avoids the frequent switching of energy-storage battery charging and discharging state in traditional scheme, is conducive to the stabilization of system.
Description
Technical field
The utility model is related to field of photovoltaic power generation more particularly to a kind of collecting and distributing type photovoltaic generation energy storage frequency modulation systems.
Background technology
Most electric energy of conventional electric power system are provided by synchronous generator, and synchronous generator rotor has machinery
Rotary inertia, under this method of operation, when electric system has disturbance or breaks down, synchronous generator, which can utilize, to be turned
The kinetic energy contained in son carries out energy exchange with electric system, and the stability of system is maintained with this.Photovoltaic generating system passes through
The converter plants such as the inverter that power electronic devices is constituted are connected with electric system, do not have inertia and damping, a large amount of to access
Harmful effect can be caused to the dynamic stability of electric system, in order to make distributed photovoltaic inverter generate electricity with conventional synchronization
The rotor rotatory inertia of machine and damping, now the virtual synchronous generator control technology based on synchronous generator theory by
The common concern of people.The distributed photovoltaic inverter of existing virtual synchronous generator control strategy is essentially divided into two kinds：
Scheme one, as shown in Figure 1, the program (includes the DC/ of MPPT maximum power point tracking by photovoltaic array, MPPT header boxs
The header box of DC converters) and DC/AC inverters composition, only include photovoltaic inversion branch, no energy storage branch.When mains frequency is sent out
When changing needs DC/AC inverters to increase active power output, the natural causes such as illumination are limited by, DC/AC inverters can not be from light
It lies prostrate solar panel and obtains more energy, therefore the program only adapts to small part frequency modulation demand.Scheme two, as shown in Fig. 2, the program
Including photovoltaic inversion branch, while energy storage branch is also increased, and in practical applications, the extra sun that photovoltaic battery panel generates
After capable of converting by two-way DC/DC energy storage converter, in storage to energy-storage battery, need to increase when mains frequency changes
When active power output, two-way DC/DC energy storage converter and DC/AC inverters collaborative work the energy of energy-storage battery can be discharged to
Power grid；But the photovoltaic inversion energy-storage system, causing to contribute in due course in the reasons such as sudden load change or photovoltaic battery panel shade rises sharply
When rapid drawdown, energy-storage battery will continually carry out charge and discharge switching, seriously affect the service life of energy-storage battery, at the same with storage
The two-way DC/DC energy storage converter of energy battery connection, increases system cost and failure rate.
Utility model content
The purpose of this utility model is that by a kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system, to solve background above
The problem of technology segment is mentioned.
For this purpose, the utility model uses following technical scheme：
A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system comprising several photovoltaic arrays, corresponding with photovoltaic array
MPPT header boxs, DC/AC inverters and storage capacitor；The MPPT header boxs are connect with photovoltaic array output end；The DC/
AC inverters are connect with MPPT header boxs；The storage capacitor is articulated in the direct current between MPPT header boxs and DC/AC inverters
On busbar.
Particularly, the DC/AC inverters are used for：When power grid is without frequency modulation demand, the storage capacitor voltage is adjusted to
Preset high-voltage value, when power grid has frequency modulation demand, DC/AC inverters increase active power output, and storage capacitor is inverse by DC/AC
Become device and be discharged to power grid, maintains the stabilization of power grids.
Particularly, the storage capacitor uses but is not limited to electrolytic capacitor, super capacitor.
The utility model proposes collecting and distributing type photovoltaic generation energy storage frequency modulation system include several photovoltaic arrays and photovoltaic array
Corresponding MPPT header boxs, DC/AC inverters and storage capacitor；The storage capacitor is articulated in MPPT header boxs and DC/AC
On DC bus between inverter, is supported using storage capacitor as energy, the frequency in Power system dynamic process can be inhibited
Fluctuation, improves the reliability of photovoltaic inversion energy-storage system, while enhancing the stability of electric system.In the utility model
The energy that DC/AC inverter frequency modulation needs the natural causes such as is not illuminated by the light and influences both from storage capacitor, avoids biography
The frequent switching of energy-storage battery charging and discharging state in system scheme, is conducive to the stabilization of system.
Description of the drawings
Fig. 1 is the structural schematic diagram of conventional photovoltaic electricity generation system；
Fig. 2 is the photovoltaic power generation system structure schematic diagram for increasing energy storage branch；
Fig. 3 is the collecting and distributing type photovoltaic generation energy storage frequency modulation system structure chart that the utility model embodiment provides.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.Make public affairs to the utility model on the contrary, purpose of providing these embodiments is
Open the more thorough and comprehensive of content understanding.It should be noted that when an element is considered as " connection " another element, it can
To be directly to another element or may be simultaneously present centering elements.Unless otherwise defined, institute used herein
Some technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs.Herein
In term used in the description of the utility model be only for the purpose of describing specific embodiments and be not intended to
Limit the utility model.Term " and or " used herein include the arbitrary of one or more relevant Listed Items and
All combinations.
It please refers to shown in Fig. 3, Fig. 3 is the collecting and distributing type photovoltaic generation energy storage frequency modulation system knot that the utility model embodiment provides
Composition.
Collecting and distributing type photovoltaic generation energy storage frequency modulation system specifically includes several photovoltaic arrays and photovoltaic array pair in the present embodiment
MPPT header boxs, DC/AC inverters and the storage capacitor answered.The MPPT header boxs are connect with photovoltaic array output end；Institute
DC/AC inverters are stated to connect with MPPT header boxs；The storage capacitor is articulated between MPPT header boxs and DC/AC inverters
On DC bus.The storage capacitor uses but is not limited to electrolytic capacitor, super capacitor etc. in the present embodiment.
When power grid is in normal interval without frequency modulation demand, that is, mains frequency, DC/AC inverters are electric by the storage capacitor
Pressure is adjusted to preset high-voltage value, and when power grid has the i.e. mains frequency suddenly change of frequency modulation demand, DC/AC inverters increase active
It contributes, storage capacitor is discharged to power grid by DC/AC inverters, meets the primary frequency modulation demand of power grid, maintains the stabilization of power grids.
Storage capacitor is articulated in the direct current between MPPT header boxs and DC/AC inverters in the technical solution of the utility model
On busbar, is supported using storage capacitor as energy, the frequency fluctuation in Power system dynamic process can be inhibited, it is inverse to improve photovoltaic
Become the reliability of energy-storage system, while enhancing the stability of electric system.DC/AC inverters frequency modulation needs in the utility model
Energy both from storage capacitor, therefore the natural causes such as be not illuminated by the light and influence, avoid energy-storage battery in traditional scheme and fill
The frequent switching of discharge condition is conducive to the stabilization of system.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
Can also include other more equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Right determine.
Claims (3)
1. a kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system, which is characterized in that including several photovoltaic arrays and photovoltaic array pair
MPPT header boxs, DC/AC inverters and the storage capacitor answered；The MPPT header boxs are connect with photovoltaic array output end；Institute
DC/AC inverters are stated to connect with MPPT header boxs；The storage capacitor is articulated between MPPT header boxs and DC/AC inverters
On DC bus.
2. collecting and distributing type photovoltaic generation energy storage frequency modulation system according to claim 1, which is characterized in that the DC/AC inversions
Device is used for when power grid is without frequency modulation demand, and the storage capacitor voltage is adjusted to preset high-voltage value, has frequency modulation to need in power grid
When asking, DC/AC inverters increase active power output, and storage capacitor is discharged to power grid by DC/AC inverters, maintains the stabilization of power grids.
3. collecting and distributing type photovoltaic generation energy storage frequency modulation system according to claim 1, which is characterized in that the storage capacitor is adopted
With but be not limited to electrolytic capacitor, super capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721847396.9U CN207732453U (en) | 2017-12-26 | 2017-12-26 | A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721847396.9U CN207732453U (en) | 2017-12-26 | 2017-12-26 | A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207732453U true CN207732453U (en) | 2018-08-14 |
Family
ID=63086444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721847396.9U Active CN207732453U (en) | 2017-12-26 | 2017-12-26 | A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207732453U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535179A (en) * | 2019-09-11 | 2019-12-03 | 浙江正泰新能源开发有限公司 | A kind of direct current conflux case grade energy-storage system and its control method |
| CN110797915A (en) * | 2019-11-13 | 2020-02-14 | 国网安徽省电力有限公司 | Photovoltaic power station active frequency control method based on energy storage |
| CN110829464A (en) * | 2019-11-19 | 2020-02-21 | 国网安徽省电力有限公司 | Photovoltaic energy storage battery frequency modulation system and method based on direct current side |
| CN110854879A (en) * | 2019-11-19 | 2020-02-28 | 国网安徽省电力有限公司 | Be applied to electric wire netting frequency modulation device of photovoltaic direct current side |
-
2017
- 2017-12-26 CN CN201721847396.9U patent/CN207732453U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110535179A (en) * | 2019-09-11 | 2019-12-03 | 浙江正泰新能源开发有限公司 | A kind of direct current conflux case grade energy-storage system and its control method |
| CN110797915A (en) * | 2019-11-13 | 2020-02-14 | 国网安徽省电力有限公司 | Photovoltaic power station active frequency control method based on energy storage |
| CN110829464A (en) * | 2019-11-19 | 2020-02-21 | 国网安徽省电力有限公司 | Photovoltaic energy storage battery frequency modulation system and method based on direct current side |
| CN110854879A (en) * | 2019-11-19 | 2020-02-28 | 国网安徽省电力有限公司 | Be applied to electric wire netting frequency modulation device of photovoltaic direct current side |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207732453U (en) | A kind of collecting and distributing type photovoltaic generation energy storage frequency modulation system | |
| CN102510089B (en) | Wind-solar storage micro-grid system | |
| Ariyaratna et al. | A novel control strategy to mitigate slow and fast fluctuations of the voltage profile at common coupling Point of rooftop solar PV unit with an integrated hybrid energy storage system | |
| AU2006225334A1 (en) | Methods and apparatus for coupling an energy storage system to a variable energy supply system | |
| Dongmei et al. | Micro-grid connected/islanding operation based on wind and PV hybrid power system | |
| CN203761297U (en) | Multipath direct current input bidirectional energy storage current transformer | |
| CN202405863U (en) | Hybrid inverter | |
| CN103944180A (en) | Hybrid energy storage wind/PV hybrid generation system based on solid state transformer | |
| CN105552966A (en) | Energy-storage direct-drive permanent magnet wind power generation system | |
| Enang et al. | Enhanced modular multilevel converter based STATCOM with hybrid energy storage | |
| CN112769161A (en) | Multi-mode energy storage micro-grid system | |
| Aarathi et al. | Grid connected photovoltaic system with super capacitor energy storage and STATCOM for power system stability enhancement | |
| Kagadi et al. | Impacts of High rooftop PV Penetration in distribution network and its mitigation using DSTATCOM | |
| CN205407282U (en) | Energy storage type directly drives permanent magnet wind power power generation system | |
| CN104600811A (en) | Intelligent photovoltaic charging system | |
| CN202405799U (en) | Independent wind-power grid system based on direct current bus | |
| Liu et al. | Analysis of load electricity consumption on a low-voltage distribution system with community energy storages | |
| CN103187794B (en) | Compound invertion device | |
| Geng et al. | An improved voltage control strategy for DC microgrid with hybrid storage system | |
| US20220094174A1 (en) | Multi-source microgrid power supply system in oil well area | |
| CN209881421U (en) | Oil well area multi-source micro-grid power supply device system | |
| CN109599898B (en) | Control method and device for improving consumption of distributed power supply | |
| CN203466579U (en) | Grid-connected offline direct-current micro-grid system | |
| Liu et al. | Voltage regulation of distribution feeders by distributed energy resources coordination control in microgrid | |
| CN104092247A (en) | Wind power conversion device suitable for off-grid wind driven generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |