CN210297271U - Topological structure of energy storage inversion module - Google Patents
Topological structure of energy storage inversion module Download PDFInfo
- Publication number
- CN210297271U CN210297271U CN201921053334.XU CN201921053334U CN210297271U CN 210297271 U CN210297271 U CN 210297271U CN 201921053334 U CN201921053334 U CN 201921053334U CN 210297271 U CN210297271 U CN 210297271U
- Authority
- CN
- China
- Prior art keywords
- contactor
- energy storage
- links
- emc
- isolation transformer
- 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.)
- Expired - Fee Related
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 36
- 238000002955 isolation Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 102100034232 ER membrane protein complex subunit 9 Human genes 0.000 abstract description 2
- 101000925833 Homo sapiens ER membrane protein complex subunit 9 Proteins 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 102100037527 ER membrane protein complex subunit 2 Human genes 0.000 description 2
- 101000880998 Homo sapiens ER membrane protein complex subunit 2 Proteins 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model discloses a topological structure of energy storage contravariant module, it relates to including direct current contactor, first EMC, contravariant module, LC filter equipment, isolation transformer, ac contactor, ac circuit breaker, lightning protection device and second EMC, the direct current voltage DC end that links to each other with the battery end links to each other with DC contactor, be provided with first EMC between DC contactor and the contravariant module, LC filter equipment, isolation transformer 5 links to each other in proper order, be provided with second EMC9 between isolation transformer and the ac contactor, ac contactor and the main epaxial ac circuit breaker, lightning protection device links to each other in proper order, lightning protection device links to each other with the alternating current voltage end. The utility model has the characteristics of high conversion efficiency, wide voltage input scope, fast and off-grid switching and convenient maintenance etc, possess perfect protect function simultaneously, if island protection, direct current overvoltage protection and low voltage ride through (optional) etc. satisfy and off-grid requirement. The 1MW high-power energy storage inverter module has high power and stronger stability and reliability.
Description
Technical Field
The utility model relates to an contravariant module, concretely relates to topological structure of energy storage contravariant module.
Background
The photovoltaic energy storage project is generally and widely applied to the construction of a large-scale energy storage power station, the number of the energy storage inversion modules required by the low-power energy storage inverter module in the power station with the same capacity requirement can be large, and the energy storage inversion modules are placed in the container, so that the number of the energy storage inverter modules required by the container is increased. This not only greatly increases the cost, but also results in a longer construction period. And after the number of the devices is increased, the line connection is more complicated, and the debugging and the control are not easy.
The single PCS's power on the market can realize 500KW at most, also can satisfy the demand of energy storage contravariant above the function, but to the electric wire netting, what needs is the large-scale energy storage system more than the hundred megawatts level, this just means that the two-way contravariant module of 200 pieces of 500KW probably can reach the construction requirement of large-scale energy storage power station. 1MW PCS is more advantageous, and the PCS only needs half of the original PCS under the condition of the same power, so that the construction period can be shortened, the power loss is reduced, and the control aspect is simpler and more reliable.
To sum up, the utility model designs an energy storage contravariant module's topological structure.
Disclosure of Invention
The utility model aims at providing a not enough to exist on the prior art, the utility model aims at providing a topological structure of energy storage contravariant module has high conversion efficiency, wide voltage input scope, fast and from characteristics such as net switch over and convenient maintenance, possesses perfect protect function simultaneously, if island protection, direct current overvoltage protection and low-voltage ride through (optional) etc. satisfy and leave the net requirement. The 1MW high-power energy storage inverter module has high power and stronger stability and reliability.
In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a topological structure of energy storage contravariant module, including direct current contactor, first EMC, contravariant module, LC filter equipment, isolation transformer, ac contactor, ac circuit breaker, lightning protection device and second EMC, the direct current voltage DC end that links to each other with the battery end links to each other with direct current contactor, be provided with first EMC between direct current contactor and the contravariant module, LC filter equipment, isolation transformer links to each other in proper order, be provided with second EMC between isolation transformer and the ac contactor, ac contactor and the ac circuit breaker on the main circuit, lightning protection device links to each other in proper order, lightning protection device links to each other with the AC voltage end.
Preferably, the isolation transformer is removable.
The utility model has the advantages that: to the electric wire netting, what need be is the large-scale energy storage system more than the hundred megawatts level, this just means that 200 two-way inverters of 500KW probably need just can reach the construction requirement in large-scale energy storage power station, the utility model discloses a single energy storage inverter's power is high, the power station of same capacity, the utility model discloses the energy storage inverter that needs is small in quantity, not only can save the cost, and stability reliability all can improve greatly.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a diagram of the energy storage system of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1, the following technical solutions are adopted in the present embodiment: the utility model provides a topological structure of energy storage contravariant module, including direct current contactor 1, first EMC2, contravariant module 3, LC filter device 4, isolation transformer 5, alternating current contactor 6, alternating current breaker 7, lightning protection device 8 and second EMC9, the direct current voltage DC end that links to each other with the battery end links to each other with direct current contactor 1, be provided with first EMC2 between direct current contactor 1 and the contravariant module 3, LC filter device 4, isolation transformer 5 links to each other in proper order, be provided with second 9 between isolation transformer 5 and the alternating current contactor 6, alternating current contactor 6 and the alternating current breaker 7 on the main circuit, lightning protection device 8 links to each other in proper order, lightning protection device 8 links to each other with the alternating current voltage end.
The working principle of the specific embodiment is as follows: the battery end outputs a group of DC + and DC-DC voltages, the DC voltages are sent to the DC input end of the 1MW energy storage inverter and are sent to the inversion module through the contactor and the DC filtering module. The AC is converted from DC to AC after passing through the inversion module 3, but the AC at this time is not a very smooth sine wave, and an LC filter device is needed for filtering on an electric appliance, and software is also needed for assisting in filtering in the control process, so that smooth sine wave voltage output is obtained. And after output, the transformer is connected (the transformer can be selectively installed or not installed), and after the transformer is isolated, the transformer passes through an alternating current filter device and then is connected to an alternating current contactor. The main circuit is provided with an alternating current short-circuiting device and a lightning protection device. The function of the whole inverter is to convert direct current voltage into alternating current voltage.
The use method of the embodiment comprises the following steps: as shown in fig. 2, the energy storage power generation system is composed of a battery cabinet, a dc distribution cabinet (selective distribution), an energy storage device, an ac distribution cabinet and a voltage boosting system. The storage battery is subjected to series-parallel tandem connection through the battery cabinets, is input to the energy storage device after being converged by the direct-current power distribution cabinet, and the output of the energy storage device is connected to the alternating-current power distribution cabinet and works in different modes as required.
The energy storage device plays a core role in the whole system, has the characteristics of high conversion efficiency, wide voltage input range, fast grid-connected and off-grid switching, convenient maintenance and the like, and simultaneously has perfect protection functions, such as island protection, direct-current overvoltage protection, low-voltage ride through (optional) and the like, so that the grid-connected and off-grid requirements are met. The input side of the energy storage device is 1-way inlet, and the output side of the energy storage device can be provided with an isolation transformer.
Example 1, the scheme is applied to a Gansu 720MWH photovoltaic energy storage system, and a 3-station 10MW PCS container is composed of a single 1MW energy storage inverter. Under the condition of the same power, the required PCS is small in quantity, low in power consumption, high in stability, safe and reliable.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A topological structure of an energy storage inversion module is characterized by comprising a direct current contactor (1), a first EMC (2), an inversion module (3), an LC filter device (4), an isolation transformer (5), an alternating current contactor (6), an alternating current breaker (7), a lightning protection device (8) and a second EMC (9), the direct-current voltage DC end connected with the battery end is connected with the direct-current contactor (1), a first EMC (2) is arranged between the direct-current contactor (1) and the inversion module (3), the LC filter device (4) and the isolation transformer (5) are sequentially connected, a second EMC (9) is arranged between the isolation transformer (5) and the alternating-current contactor (6), the alternating-current contactor (6) is sequentially connected with the alternating-current circuit breaker (7) and the lightning protection device (8) on the main circuit, and the lightning protection device (8) is connected with the alternating-current voltage end.
2. The topology of an energy storage inverter module according to claim 1, wherein the isolation transformer (5) is removable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053334.XU CN210297271U (en) | 2019-07-08 | 2019-07-08 | Topological structure of energy storage inversion module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921053334.XU CN210297271U (en) | 2019-07-08 | 2019-07-08 | Topological structure of energy storage inversion module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210297271U true CN210297271U (en) | 2020-04-10 |
Family
ID=70101037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921053334.XU Expired - Fee Related CN210297271U (en) | 2019-07-08 | 2019-07-08 | Topological structure of energy storage inversion module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210297271U (en) |
-
2019
- 2019-07-08 CN CN201921053334.XU patent/CN210297271U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103607032B (en) | Renewable energy power generation, power transmission and transformation and electrical network access integral system | |
| CN104467005B (en) | The control method of T-shaped three-level three-phase four-bridge arm grid-connected photovoltaic system | |
| CN202841003U (en) | Novel three-phase photovoltaic grid-connected inverter system structure | |
| CN103915856B (en) | A kind of base station is grid-connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN102097966A (en) | Cascade megawatt photovoltaic grid-connected inverter | |
| CN104377732A (en) | DC bus distributed MPPT photovoltaic power generation system | |
| CN203313097U (en) | Large power photovoltaic power generation system | |
| CN102142688B (en) | Electric power grid connecting system as well as electric power transmission system and method | |
| CN104953589A (en) | Combined three-phase microgrid system with serially-connected microsource inverters | |
| CN203589824U (en) | Renewable energy power generation, power transmission and transformation and power grid access integration system | |
| CN104242706A (en) | MW-level photovoltaic inverter system topological structure | |
| CN205304269U (en) | Direct current pressure increasing system of grid -connected PV electricity generation | |
| CN203261257U (en) | Solar photovoltaic power generation single-phase grid-connected inverter | |
| CN210297271U (en) | Topological structure of energy storage inversion module | |
| CN202564966U (en) | Photovoltaic system | |
| CN203537259U (en) | Five-level single-phase photovoltaic grid-connected inverter | |
| CN202930969U (en) | Single-phase photovoltaic grid-connected power generation inverter circuit capable of reducing earth leakage current | |
| CN203674725U (en) | Photovoltaic grid-connected power generation system | |
| CN202084952U (en) | On-grid power converter device of switched reluctance generator | |
| CN201774309U (en) | Emergency power supply with photovoltaic grid feed function | |
| CN205657428U (en) | Complementary direct current microgrid structure of sea island type scene | |
| CN104467653A (en) | Bipolar photovoltaic system topology structure and application thereof | |
| CN202488382U (en) | Solar photovoltaic power station of application model | |
| CN202019313U (en) | Photovoltaic inversion device without transformer | |
| CN204334372U (en) | MW class group string data inversion boosting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200410 |