CN218415827U - Frequency modulation system based on three-phase flywheel energy storage - Google Patents
Frequency modulation system based on three-phase flywheel energy storage Download PDFInfo
- Publication number
- CN218415827U CN218415827U CN202222393847.3U CN202222393847U CN218415827U CN 218415827 U CN218415827 U CN 218415827U CN 202222393847 U CN202222393847 U CN 202222393847U CN 218415827 U CN218415827 U CN 218415827U
- Authority
- CN
- China
- Prior art keywords
- phase
- energy storage
- flywheel energy
- storage unit
- frequency modulation
- 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
Images
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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model relates to a frequency modulation system based on three-phase flywheel energy storage, wherein, frequency modulation system includes: the system comprises a generator, a generator main transformer, an A-phase flywheel energy storage unit, a B-phase flywheel energy storage unit and a C-phase flywheel energy storage unit; the generator is connected with a power grid system through the generator main transformer; the A-phase flywheel energy storage unit, the B-phase flywheel energy storage unit and the C-phase flywheel energy storage unit are respectively connected to the outlet of the generator. The utility model provides a technical scheme, with three-phase high pressure flywheel energy storage system direct access generator export, can combine generating set to participate in responding to electric wire netting frequency modulation adjustment in-process, can the quick response frequency modulation instruction to the security of system has been improved.
Description
Technical Field
The utility model relates to a frequency modulation technical field, concretely relates to frequency modulation system based on three-phase flywheel energy storage.
Background
In recent years, with the development of the energy storage industry, various novel energy storage technologies are broken through continuously, and demonstration applications are realized in more and more scenes, wherein the novel energy storage technologies mainly include a heat storage technology, a hydrogen energy storage technology, an electromagnetic energy storage technology, a flywheel energy storage technology and the like. With the increase of the grid-connected quantity of wind power and photovoltaic power, the rapid development of interconnected large power grids, large-capacity power generation and long-distance power transmission, the adjustment task of a power system is heavier. The energy storage unit is used as a power supply capable of being charged and discharged flexibly, can realize dynamic energy absorption and release in a power grid, and has the advantages of replacement or not in maintaining the voltage stability of the power grid due to quick response and flexible control.
At present in the frequency modulation field, mostly adopt the concentrated change of current mode, need the energy storage to step up the transformer and be connected to the section for the thermal power plant high pressure plant, the frequency modulation is more loaded down with trivial details, simultaneously concentrate the change of current mode because with energy storage battery through the series-parallel connection in direct current side, if single battery module goes wrong, the aggravation of wooden cask short slab effect, direct current circulation efficiency reduces, different electric cores exert power the inequality/partial electric core decay is too fast/the temperature rise is too high for current frequency modulation response is slower and the security is not high.
Disclosure of Invention
The utility model provides a frequency modulation system based on three-phase flywheel energy storage to solve the technical problem that the frequency modulation is slow and adjust the inaccuracy among the correlation technique at least.
The embodiment of the first aspect of the utility model provides a frequency modulation system based on three-phase flywheel energy storage, include: the system comprises a generator, a generator main transformer, an A-phase flywheel energy storage unit, a B-phase flywheel energy storage unit and a C-phase flywheel energy storage unit;
the generator is connected with a power grid system through the generator main transformer;
the phase A flywheel energy storage unit, the phase B flywheel energy storage unit and the phase C flywheel energy storage unit are respectively connected to the outlet of the generator.
Preferably, the frequency modulation system further comprises: the phase A filter inductor, the phase B filter inductor and the phase C filter inductor are connected in series;
the A-phase flywheel energy storage unit is connected to the outlet of the generator through the A-phase filter inductor;
the B-phase flywheel energy storage unit is connected to the outlet of the generator through the B-phase filter inductor;
and the C-phase flywheel energy storage unit is connected to the outlet of the generator through the C-phase filter inductor.
Further, the frequency modulation system further comprises: the phase A is connected with a network breaker, the phase B is connected with a network breaker and the phase C is connected with a network breaker;
the A-phase flywheel energy storage unit is connected with the A-phase filter inductor through the A-phase grid breaker;
the B-phase flywheel energy storage unit is connected with the B-phase filter inductor through the B-phase grid breaker;
and the C-phase flywheel energy storage unit is connected with the C-phase filter inductor through the C-phase grid-connected circuit breaker.
Preferably, the phase a flywheel energy storage unit includes: n A-phase H-bridge converter devices and N A-phase flywheel energy storage batteries;
one A-phase H-bridge converter device is connected with one A-phase flywheel energy storage battery in parallel;
and N A-phase H-bridge converter devices are connected in series.
Preferably, the B-phase flywheel energy storage unit includes: n B-phase H-bridge converter devices and N B-phase flywheel energy storage batteries;
one B-phase H-bridge converter device is connected with one B-phase flywheel energy storage battery in parallel;
and N B-phase H-bridge converter devices are connected in series.
Preferably, the C-phase flywheel energy storage unit includes: n C-phase H-bridge converter devices and N C-phase flywheel energy storage batteries;
one C-phase H-bridge converter device is connected with one C-phase flywheel energy storage battery in parallel;
and N C-phase H-bridge converter devices are connected in series.
Preferably, the tail end of the A-phase flywheel energy storage unit, the tail end of the B-phase flywheel energy storage unit and the tail end of the C-phase flywheel energy storage unit are connected in a three-phase star connection mode.
The embodiment of the utility model provides a technical scheme brings following beneficial effect at least:
the utility model provides a pair of frequency modulation system based on three-phase flywheel energy storage, wherein, frequency modulation system includes: the system comprises a generator, a generator main transformer, an A-phase flywheel energy storage unit, a B-phase flywheel energy storage unit and a C-phase flywheel energy storage unit; the generator is connected with a power grid system through the generator main transformer; the A-phase flywheel energy storage unit, the B-phase flywheel energy storage unit and the C-phase flywheel energy storage unit are respectively connected to the outlet of the generator. The utility model provides a technical scheme, with three-phase high pressure flywheel energy storage system direct access generator export, can combine generating set to participate in responding to electric wire netting frequency modulation adjustment in-process, can the quick response frequency modulation instruction to the security of system has been improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a structural diagram of a frequency modulation system based on three-phase flywheel energy storage according to an embodiment of the present invention;
fig. 2 is a detailed structural diagram of a frequency modulation system based on three-phase flywheel energy storage according to an embodiment of the present invention;
reference numerals are as follows:
the device comprises a generator 1, a generator main transformer 2, an A-phase flywheel energy storage unit 3, a B-phase flywheel energy storage unit 4, a C-phase flywheel energy storage unit 5, an A-phase filter inductor 6, a B-phase filter inductor 7, a C-phase filter inductor 8, an A-phase grid connection circuit breaker 9, a B-phase grid connection circuit breaker 10, a C-phase grid connection circuit breaker 11, an A-phase H bridge current conversion device 3-1, an A-phase flywheel energy storage battery 3-2, a B-phase H bridge current conversion device 4-1, a B-phase flywheel energy storage battery 4-2, a C-phase H bridge current conversion device 5-1 and a C-phase flywheel energy storage battery 5-2.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary intended for explaining the present invention, and should not be construed as limiting the present invention.
The utility model provides a frequency modulation system based on three-phase flywheel energy storage, wherein, frequency modulation system includes: the system comprises a generator, a generator main transformer, an A-phase flywheel energy storage unit, a B-phase flywheel energy storage unit and a C-phase flywheel energy storage unit; the generator is connected with a power grid system through the generator main transformer; the A-phase flywheel energy storage unit, the B-phase flywheel energy storage unit and the C-phase flywheel energy storage unit are respectively connected to the outlet of the generator. The utility model provides a technical scheme with three-phase high pressure flywheel energy storage system direct access generator export, can unite generating set and participate in responding to the electric wire netting frequency modulation adjustment in-process, can the quick response frequency modulation instruction to the security of system has been improved.
The following describes a frequency modulation system based on three-phase flywheel energy storage according to an embodiment of the present invention with reference to the drawings.
Example 1
Fig. 1 is a structural diagram of a frequency modulation system based on three-phase flywheel energy storage according to an embodiment of the present disclosure, as shown in fig. 1, including: the system comprises a generator 1, a generator main transformer 2, an A-phase flywheel energy storage unit 3, a B-phase flywheel energy storage unit 4 and a C-phase flywheel energy storage unit 5;
the generator 1 is connected with a power grid system through the generator main transformer 2;
the phase A flywheel energy storage unit 3, the phase B flywheel energy storage unit 4 and the phase C flywheel energy storage unit 5 are respectively connected to an outlet of the generator 1.
In some embodiments, the A-phase flywheel energy storage unit 3, the B-phase flywheel energy storage unit 4 and the C-phase flywheel energy storage unit 5 are adopted to assist the thermal power generating unit, namely the generator 1, to participate in response to the frequency modulation adjustment of a power grid, the power adjustment of the thermal power generating unit by the response power grid is assisted by the characteristics of rapid charging and accurate power control of an energy storage system, the thermal power generating unit is assisted to participate in the frequency modulation of the power grid together, and the energy storage system is directly connected to an outlet of the generator, so that most of energy storage is prevented from being connected to a service section, and the transformation of equipment is avoided.
In this disclosure, as shown in fig. 2, the frequency modulation system further includes: the filter comprises an A-phase filter inductor 6, a B-phase filter inductor 7 and a C-phase filter inductor 8;
the A-phase flywheel energy storage unit 3 is connected to the outlet of the generator 1 through the A-phase filter inductor 6;
the B-phase flywheel energy storage unit 4 is connected to the outlet of the generator 1 through the B-phase filter inductor 7;
the C-phase flywheel energy storage unit 5 is connected to the outlet of the generator 1 through the C-phase filter inductor 8.
Further, as shown in fig. 2, the frequency modulation system further includes: the phase A is connected with a grid circuit breaker 9, the phase B is connected with a grid circuit breaker 10 and the phase C is connected with a grid circuit breaker 11;
the A-phase flywheel energy storage unit 3 is connected with the A-phase filter inductor 6 through the A-phase grid connection circuit breaker 9;
the B-phase flywheel energy storage unit 4 is connected with the B-phase filter inductor 7 through the B-phase grid-connected circuit breaker 10;
the C-phase flywheel energy storage unit 5 is connected with the C-phase filter inductor 8 through the C-phase grid breaker 11.
As shown in fig. 2, the a-phase flywheel energy storage unit 3 includes: n A-phase H-bridge converter devices 3-1 and N A-phase flywheel energy storage batteries 3-2;
one A-phase H-bridge converter device 3-1 is connected with one A-phase flywheel energy storage battery 3-2 in parallel;
n A-phase H-bridge converter devices 3-1 are connected in series.
As shown in fig. 2, the B-phase flywheel energy storage unit includes: n B-phase H-bridge converter devices 4-1 and N B-phase flywheel energy storage batteries 4-2;
one B-phase H-bridge converter device 4-1 is connected with one B-phase flywheel energy storage battery 4-2 in parallel;
n B-phase H-bridge converter devices 4-1 are connected in series.
As shown in fig. 2, the C-phase flywheel energy storage unit 5 includes: n C-phase H-bridge converter devices 5-1 and N C-phase flywheel energy storage batteries 5-2;
one C-phase H-bridge converter device 5-1 is connected with one C-phase flywheel energy storage battery 5-2 in parallel;
the N C-phase H-bridge converter devices 5-1 are connected in series.
As shown in fig. 2, the tail end of the a-phase flywheel energy storage unit 3, the tail end of the B-phase flywheel energy storage unit 4, and the tail end of the C-phase flywheel energy storage unit 5 are connected in a three-phase star connection manner.
In some embodiments, the tail end of the a-phase flywheel energy storage unit 3, the tail end of the B-phase flywheel energy storage unit 4 and the tail end of the C-phase flywheel energy storage unit 5 are connected in a three-phase star connection manner, each phase is superposed to 20kV through a filter reactance and directly connected to an outlet of the generator 1 without energy storage step-up transformer, H-bridge converter devices in each phase are connected with flywheel energy storage batteries in a one-to-one correspondence manner in a parallel connection manner, the operation is independent, the coupling degree is low, the field and investment are saved, and the reliability of equipment is enhanced.
When a single flywheel energy storage battery is damaged, the H-bridge converter device is directly switched on, the damaged single flywheel energy storage battery can be isolated on site, the work of other flywheel energy storage batteries cannot be influenced, the short plate benefit of a wooden barrel cannot be caused unlike a centralized converter energy storage system, and the direct current circulation is further controlled. A single H bridge energy storage unit adopts a series connection scheme, the problem of uneven output of different electric cores in a parallel connection scheme does not exist, the temperature rise is controlled, and the safety risk caused by overhigh temperature rise does not exist.
It should be noted that the flywheel energy storage battery of each phase realizes electric energy conversion through the H-bridge converter device of each phase, the H-bridge converter device adopts a fully controlled power device, the current is 1.5 times of the rated current at most, the requirement on the dynamic thermal stability of the circuit breaker is not high, the protection is simple, and the fault range is not expanded.
In some embodiments, a single flywheel energy storage battery is connected with a single H bridge converter in parallel, n flywheel energy storage batteries and the H bridge converter form a one-phase flywheel energy storage unit, each phase adopts a hot standby redundancy design, the reliability is remarkably improved, 3 one-phase flywheel energy storage units form a system containing three phases A, B and C, and the three-phase flywheel energy storage units are connected in series and boosted to 20kV, then connected to an outlet of the generator 1 and connected to an output A, B and C three-phase alternating current bus of the generator 1.
In summary, in the frequency modulation system based on the three-phase flywheel energy storage provided by this embodiment, the three-phase high-voltage flywheel energy storage system is directly connected to the generator outlet, so that the combined generator set can participate in the process of responding to the frequency modulation regulation of the power grid, the frequency modulation instruction can be quickly responded, and the safety of the system is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (7)
1. A frequency modulation system based on three-phase flywheel energy storage, characterized by comprising: the system comprises a generator, a generator main transformer, an A-phase flywheel energy storage unit, a B-phase flywheel energy storage unit and a C-phase flywheel energy storage unit;
the generator is connected with a power grid system through the generator main transformer;
the A-phase flywheel energy storage unit, the B-phase flywheel energy storage unit and the C-phase flywheel energy storage unit are respectively connected to the outlet of the generator.
2. A frequency modulation system as claimed in claim 1, wherein the frequency modulation system further comprises: the phase A filter inductor, the phase B filter inductor and the phase C filter inductor are connected in series;
the A-phase flywheel energy storage unit is connected to the outlet of the generator through the A-phase filter inductor;
the B-phase flywheel energy storage unit is connected to the outlet of the generator through the B-phase filter inductor;
and the C-phase flywheel energy storage unit is connected to the outlet of the generator through the C-phase filter inductor.
3. A frequency modulation system as claimed in claim 2, wherein the frequency modulation system further comprises: the A phase grid connection circuit breaker, the B phase grid connection circuit breaker and the C phase grid connection circuit breaker;
the A-phase flywheel energy storage unit is connected with the A-phase filter inductor through the A-phase grid breaker;
the B-phase flywheel energy storage unit is connected with the B-phase filter inductor through the B-phase grid-connected circuit breaker;
and the C-phase flywheel energy storage unit is connected with the C-phase filter inductor through the C-phase grid breaker.
4. A frequency modulation system as claimed in claim 1, wherein the a-phase flywheel energy storage unit comprises: n A-phase H-bridge converter devices and N A-phase flywheel energy storage batteries;
one A-phase H-bridge converter device is connected with one A-phase flywheel energy storage battery in parallel;
and N A-phase H-bridge converter devices are connected in series.
5. A frequency modulation system according to claim 1 wherein the B-phase flywheel energy storage unit comprises: n B-phase H-bridge converter devices and N B-phase flywheel energy storage batteries;
one B-phase H-bridge converter device is connected with one B-phase flywheel energy storage battery in parallel;
and N B-phase H-bridge converter devices are connected in series.
6. A frequency modulation system as claimed in claim 1, wherein the C-phase flywheel energy storage unit comprises: n C-phase H-bridge converter devices and N C-phase flywheel energy storage batteries;
one C-phase H-bridge converter device is connected with one C-phase flywheel energy storage battery in parallel;
and the N C-phase H-bridge converter devices are connected in series.
7. A frequency modulation system according to claim 1, wherein the ends of the a-phase flywheel energy storage unit, the B-phase flywheel energy storage unit and the C-phase flywheel energy storage unit are connected in a three-phase star connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222393847.3U CN218415827U (en) | 2022-09-08 | 2022-09-08 | Frequency modulation system based on three-phase flywheel energy storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222393847.3U CN218415827U (en) | 2022-09-08 | 2022-09-08 | Frequency modulation system based on three-phase flywheel energy storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218415827U true CN218415827U (en) | 2023-01-31 |
Family
ID=85032417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222393847.3U Active CN218415827U (en) | 2022-09-08 | 2022-09-08 | Frequency modulation system based on three-phase flywheel energy storage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218415827U (en) |
-
2022
- 2022-09-08 CN CN202222393847.3U patent/CN218415827U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107947221B (en) | Power electronic transformer direct-current fault ride-through method | |
| CN105122629A (en) | Controlling power conversion systems | |
| AU2008323597A1 (en) | Electrical energy and distribution system | |
| CN110266034A (en) | A kind of offshore wind farm DC transmission system | |
| CN114825597B (en) | Thermal power high-voltage direct-hanging energy storage backup power supply system for plant | |
| CN105978008A (en) | Flow battery energy storage system with wind field black-start function and work method thereof | |
| CN114825483B (en) | Thermal power generating unit frequency modulation system, method and device | |
| CN114243739A (en) | Energy storage centralized converter system for thermal power plant | |
| CN115173439A (en) | Controllable energy storage and thermal power combined frequency modulation system and method | |
| CN115173438B (en) | Frequency modulation system and method for flywheel energy storage auxiliary thermal power for controllable high-voltage plant | |
| CN113595119A (en) | Thermal power hybrid energy storage high-penetration low-penetration coordination control system | |
| WO2024001681A1 (en) | Hybrid energy storage assisted thermal power frequency modulation system | |
| CN218415827U (en) | Frequency modulation system based on three-phase flywheel energy storage | |
| CN114825484B (en) | Frequency modulation system and method based on energy storage of thermal power electronic transformer | |
| CN217882857U (en) | Frequency modulation system based on energy storage | |
| CN115224704B (en) | Time-sharing multiplexing peak regulation and frequency modulation power station constructed based on hybrid energy storage and control method | |
| CN217882851U (en) | Thermal power energy storage black start system | |
| CN218586896U (en) | Energy storage system based on single-phase full-bridge inverter | |
| Li et al. | A hybrid energy system using cascaded H-bridge converter | |
| CN219067870U (en) | Frequency modulation system based on flywheel energy storage | |
| CN217904028U (en) | Direct-hanging frequency modulation system based on molten salt and electric energy storage | |
| CN218586894U (en) | Frequency modulation system based on concentrated rectifying device | |
| CN115189380A (en) | Flywheel energy storage system for controllable low-voltage thermal power plant and control method | |
| CN217882865U (en) | Thermal power high-voltage direct-hanging energy storage system | |
| CN218040846U (en) | Energy storage auxiliary system in gas circulation unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |