CN114465255A - Angle-shaped modular electric energy storage system - Google Patents
Angle-shaped modular electric energy storage system Download PDFInfo
- Publication number
- CN114465255A CN114465255A CN202210013057.XA CN202210013057A CN114465255A CN 114465255 A CN114465255 A CN 114465255A CN 202210013057 A CN202210013057 A CN 202210013057A CN 114465255 A CN114465255 A CN 114465255A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- phase energy
- phase
- module
- conversion module
- 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.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 174
- 238000006243 chemical reaction Methods 0.000 claims abstract description 71
- 238000001914 filtration Methods 0.000 claims abstract description 21
- 230000009466 transformation Effects 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000012983 electrochemical energy storage Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an angle-type modularized power energy storage system, which comprises a first phase energy storage and current transformation module, a second phase energy storage and current transformation module and a third phase energy storage and current transformation module, wherein the first phase energy storage and current transformation module is connected with the second phase energy storage and current transformation module; the input end of the first phase energy storage and conversion module is connected with the output end of the third phase energy storage and conversion module, and the output end of the first phase energy storage and conversion module is connected with the input end of the second phase energy storage and conversion module; the output end of the second phase energy storage current-converting module is connected with the input end of the third phase energy storage current-converting module. Each phase energy storage current transformation module comprises a filtering device and a plurality of energy storage sub-modules. By adopting the embodiment of the invention, the embodiment of the invention provides the angle-type modular power energy storage system, energy is stored by adopting the low-voltage modular cascade mode, the limitation of direct parallel connection of battery clusters and the output of the difference between the battery clusters to the energy storage system is avoided, simultaneously, the available energy is utilized to the maximum extent, and the manufacturing cost of the energy storage system is reduced.
Description
Technical Field
The invention relates to the technical field of electrochemical energy storage, in particular to an angle-type modularized electric energy storage system.
Background
Electrochemical energy storage refers to converting electric energy into energy in other forms such as chemical energy, storing the energy, and converting the energy into electric energy to release the electric energy when needed. The electrochemical energy storage system can be applied to multiple links of power generation, power transmission, power distribution and power utilization of a power system, and can play an important role in efficient and stable operation of the power system. The energy storage technology solves the problems of randomness and volatility of new energy power generation to a great extent at the power generation side, effectively adjusts the changes of voltage and frequency of a power grid caused by the new energy power generation, and enables the new energy power generation to be flexibly and friendly connected into the power grid. The auxiliary service can be provided at the power grid side, and the peak shaving frequency modulation, the power supply reliability, the electric energy quality, the power grid operation efficiency, the asset utilization rate and the like can be improved. The system can be used for peak clipping and valley leveling at the user side, so that the electric charge is saved; the power supply can be used as a standby power supply, the power supply reliability is improved, and the influence of power failure on the operation of equipment is prevented; the power supply can be used for off-grid power supplies and the like.
At present, a direct parallel connection mode is adopted for battery clusters in an electrochemical energy storage system, and current deviation between clusters can be caused due to the consistency difference of batteries, so that the capacity difference is caused, and the output of the energy storage system is limited. In addition, the alternating-current side voltage level of the PCS is high, for example 6-35 kV, so that the requirement on the insulation level of a battery cluster is high, and the design difficulty is high; higher insulation levels require greater electrical clearance, resulting in a reduced energy density of the battery cluster. The connecting cable between the H-bridge modules needs to be matched with the voltage grade of an alternating current side, and the requirement on the insulation level is high, so that the manufacturing cost is high.
Disclosure of Invention
The embodiment of the invention provides an angle-type modular power energy storage system, which stores energy by adopting a low-voltage modular cascade module, avoids the limitation of direct parallel connection of battery clusters and the output of the difference between the battery clusters to the energy storage system, simultaneously maximally utilizes available energy, and reduces the manufacturing cost of the energy storage system.
A first aspect of an embodiment of the present application provides an angle-type modular power energy storage system, which includes a first phase energy storage and conversion module, a second phase energy storage and conversion module, and a third phase energy storage and conversion module; the input end of the first phase energy storage and conversion module is connected with the output end of the third phase energy storage and conversion module, and the output end of the first phase energy storage and conversion module is connected with the input end of the second phase energy storage and conversion module; the output end of the second phase energy storage and conversion module is connected with the input end of the third phase energy storage and conversion module; the input end of the first-phase energy storage and conversion module, the input end of the second-phase energy storage and conversion module and the input end of the third-phase energy storage and conversion module are respectively connected with one phase of an external three-phase alternating current power grid;
the first phase energy storage converter module comprises a first filtering device and a plurality of first phase energy storage sub-modules; the second phase energy storage and conversion module comprises a second filtering device and a plurality of second phase energy storage submodules; the third phase energy storage current transformation module comprises a third filtering device and a plurality of third phase energy storage sub-modules; the first phase energy storage and conversion module, the second phase energy storage submodule and the third phase energy storage submodule are the same in number.
In a possible implementation manner of the first aspect, the first filtering device is connected to one of the first phase energy storage sub-modules, and the first phase energy storage sub-modules are connected end to end.
In a possible implementation manner of the first aspect, the second filtering device is connected to one of the second phase energy storage sub-modules, and the second phase energy storage sub-modules are connected end to end.
In a possible implementation manner of the first aspect, the third filtering device is connected to one of the third phase energy storage sub-modules, and the third phase energy storage sub-modules are connected end to end.
In one possible implementation manner of the first aspect, each first-phase energy storage submodule comprises at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
In one possible implementation manner of the first aspect, each second-phase energy storage submodule contains at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
In one possible implementation manner of the first aspect, each third-phase energy storage sub-module contains at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
In a possible implementation manner of the first aspect, each first phase energy storage submodule, each second phase energy storage submodule and each third phase energy storage submodule are respectively installed in one energy cabinet; each energy cabinet contains two compartments, one for housing battery cluster equipment and one for housing other equipment.
In one possible implementation manner of the first aspect, the angle-type modular power storage system further includes a battery cluster management module; the battery cluster management module is in communication connection with the battery management unit of each battery cluster.
Compared with the prior art, the embodiment of the invention provides an angle-type modularized power energy storage system, wherein a first phase energy storage and conversion module, a second phase energy storage and conversion module and a third phase energy storage and conversion module are respectively established for each phase of an external three-phase alternating current system, the first phase energy storage and conversion module, the second phase energy storage and conversion module and the third phase energy storage and conversion module are connected in an angle-type mode in the alternating current three-phase system, each phase energy storage and conversion module is formed by cascading a plurality of energy storage sub-modules, the sub-modules are connected end to end, the voltage of a battery cluster and the voltage of the direct current side of an H-bridge module can be adjusted and adapted through a DC/DC converter, so that the fault ride-through capability of the system is high, and the stress borne by the battery is reduced under the fault condition. Each submodule works independently, and available energy is utilized to the maximum extent; each battery cluster in the submodule is connected with the bridge module through the DC/DC converter, so that the limitation of direct parallel connection of the battery clusters and the output of the difference between the battery clusters on an energy storage system is avoided, and the availability of energy storage capacity is improved; each submodule component stores electric energy from an alternating current system, so that the insulation level is effectively reduced, and the possibility of an electrical fire and accidents of an energy storage system caused by the electrical fire are reduced; the influence among the battery clusters is reduced as much as possible, so that the battery clusters are not only electrically isolated, but also physically isolated.
When each sub-module is specifically arranged, each device of each sub-module is compact and intensive, and the energy density of the energy storage station is improved; the energy density is improved as much as possible, the space of the battery cluster is reduced, the temperature of the operation space is easier to control, and the temperature deviation among the batteries is controlled; the design of the angle-shaped sub-modularization enables the arrangement to be more flexible, is suitable for various different station shapes, and can also take into account the convenience of transportation, installation, operation and maintenance.
Drawings
Fig. 1 is a schematic structural diagram of an angle-type modular power energy storage system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a modular cascade employed by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control of an angular modular power storage system according to an embodiment of the present invention;
FIG. 4 is a block diagram of a submodule including a DC/DC converter according to an embodiment of the present invention;
FIG. 5 is a block diagram of a sub-module including two DC/DC converters according to an embodiment of the present invention;
FIG. 6 is a block diagram of a sub-module according to an embodiment of the present invention;
FIG. 7 is a block diagram of a single-row layout of an angular modular power storage system according to an embodiment of the present invention;
fig. 8 is a block diagram of a multi-row arrangement of an angle-type modular power storage system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an angle-type modular power energy storage system, which includes a first phase energy storage converter module 10, a second phase energy storage converter module 20, and a third phase energy storage converter module 30; the input end of the first phase energy storage and conversion module 10 is connected to the output end of the third phase energy storage and conversion module 30, and the output end of the first phase energy storage and conversion module 10 is connected to the input end of the second phase energy storage and conversion module 20; the output end of the second phase energy storage converter module 20 is connected with the input end of the third phase energy storage converter module 30; the input end of the first phase energy storage and conversion module 10, the input end of the second phase energy storage and conversion module 20, and the input end of the third phase energy storage and conversion module 30 are respectively connected with one phase of an external three-phase alternating current power grid.
The first phase energy storage converter module 10 comprises a first filtering device 11 and a plurality of first phase energy storage sub-modules 12; the second phase energy storage converter module 20 comprises a second filtering device 21 and a plurality of second phase energy storage sub-modules 22; the third-phase energy storage converter module 30 comprises a third filtering device 31 and a plurality of third-phase energy storage sub-modules 32; the number of the first phase energy storage converter modules 10, the second phase energy storage submodule and the third phase energy storage submodule is the same.
Referring to fig. 2, the angle-type module is embodied in that the first phase energy-storing converter module 10, the second phase energy-storing converter module 20 and the third phase energy-storing converter module 30 can be regarded as an angle-type module (an input end of the first phase energy-storing converter module 10 is connected to an output end of the third phase energy-storing converter module 30, an output end of the first phase energy-storing converter module 10 is connected to an input end of the second phase energy-storing converter module 20, and an output end of the second phase energy-storing converter module 20 is connected to an input end of the third phase energy-storing converter module 30). Referring to fig. 2, each phase energy-storage converter module in fig. 2 includes 3 sub-modules (this is a structure when the rated voltage of the ac power side is 900V), and a phase line input port of the filter device of each phase (which may also be regarded as an input port of the corresponding energy-storage converter module) is connected to a corresponding phase line of the ac system.
According to the on-off condition of the IGBT in each phase of energy storage and current transformation module submodule, the submodule can output +1, -1 and 0 voltage states. Referring to fig. 3, the reference voltage on the ac side is synthesized by inputting the reference signal of the modulated wave to the corresponding sub-module.
The modulation technique may employ NLM, CPSM technique, or the like.
Compared with the prior art, the embodiment of the invention provides an angle-type modularized power energy storage system, wherein a first-phase energy storage and conversion module 10, a second-phase energy storage and conversion module 20 and a third-phase energy storage and conversion module 30 are respectively established for each phase of an external three-phase alternating current system, the first-phase energy storage and conversion module 10, the second-phase energy storage and conversion module 20 and the third-phase energy storage and conversion module 30 are connected in the alternating current three-phase system in an angle mode, each phase energy storage and conversion module is formed by cascading a plurality of energy storage sub-modules, the sub-modules are connected end to end, the voltage of a battery cluster and the voltage of the direct current side of an H-bridge module can be adjusted and adapted through a DC/DC converter, so that the fault ride-through capacity of the system is high, and the stress borne by the battery is reduced under the fault condition. Each submodule works independently, and available energy is utilized to the maximum extent; each battery cluster in the submodule is connected with the bridge module through the DC/DC converter, so that the limitation of direct parallel connection of the battery clusters and the output of the difference between the battery clusters on an energy storage system is avoided, and the availability of energy storage capacity is improved; each submodule component stores electric energy from an alternating current system, so that the insulation level is effectively reduced, and the possibility of an electrical fire and accidents of an energy storage system caused by the electrical fire are reduced; the influence among the battery clusters is reduced as much as possible, so that the battery clusters are not only electrically isolated, but also physically isolated.
When each sub-module is specifically arranged, each device of each sub-module is compact and intensive, and the energy density of the energy storage station is improved; the energy density is improved as much as possible, the space of the battery cluster is reduced, the temperature of the operation space is easier to control, and the temperature deviation among the batteries is controlled; the design of the angle-shaped sub-modularization enables the arrangement to be more flexible, is suitable for various different station shapes, and can also take into account the convenience of transportation, installation, operation and maintenance.
Illustratively, the first filtering device 11 is connected to one first-phase energy storage sub-module 12 of the plurality of first-phase energy storage sub-modules 12, and the plurality of first-phase energy storage sub-modules 12 are connected end to end.
Illustratively, the second filtering device 21 is connected to one second phase energy storage sub-module 22 of the plurality of second phase energy storage sub-modules 22, and the plurality of second phase energy storage sub-modules 22 are connected end to end.
Illustratively, the third filtering device 31 is connected to one of the third phase energy storage sub-modules, and the third phase energy storage sub-modules are connected end to end.
In the embodiment, the angle-type modularized power energy storage system adopts a low-voltage modularized cascade topology structure, the voltage of the alternating-current side system is about 800-1000V, and the capacity is about 1.25-2.5 MW. The angle-type modularized power energy storage is formed by cascading a plurality of sub-modules, the sub-modules are connected end to end, and are connected in an alternating current three-phase system through angular connection of a filter device. The number N of the sub-modules is based on the system voltage U of the alternating current sidenSubmodule DC side voltage USMDetermined comprehensively that N ≧ Un/USM. Each submodule comprises an H-bridge module, a bidirectional DC/DC converter, a filter loop, a battery cluster and necessary switches, measurement and protection facilities, wherein the DC side of the H-bridge module is connected with the DC/DC converter, the DC/DC converter is connected with the filter loop, and the filter loop is connected with the battery. The voltage of the battery cluster and the DC side voltage of the H-bridge module can be regulated by a DC/DC converter,The adaptation allows the fault ride-through capability of the system to be high and reduces the stress experienced by the battery in the event of a fault. And whether the direct current side of the submodule needs a plurality of DC/DC converters or not is determined according to the capacity of the energy storage system, and in order to avoid the direct parallel connection of the battery clusters, the plurality of DC/DC converters are adopted to realize the isolation among the battery clusters. The number M of the batteries connected in series in the battery cluster is according to the battery voltage UBSubmodule DC side voltage UDDetermined in combination, M ≧ UB/UD. The battery clusters are connected to the side of the direct current bus through the DC/DC, the battery clusters are isolated from each other due to the DC/DC, no influence is caused between the battery clusters, any cluster is failed or the short board is withdrawn, the direct realization is realized through the DC/DC of the cluster, and the operation of other clusters is not influenced.
If the rated voltage of the alternating current side is 900V, the voltage of the direct current side of the submodules is 600V, and the equipment can normally operate under the condition that the voltage of the alternating current side is 0.85-1.1p.u, the number of the submodules required by each phase is N, which is more than or equal to 1.414, 1.1, 900/500 and 2.4, and the high voltage ride through capability of the equipment is checked at the same time, and is 1.3p.u and 0.5s according to the specification requirement, if the number of the submodules is 3, the voltage born by each submodule is 1.414, 1.3/3 and 551.46V, and the maximum bearing capability of the equipment is not more than 750V, the number of the submodules per phase is 3.
Illustratively, each first phase energy storage sub-module 12 contains at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
Illustratively, each second phase energy storage sub-module 22 contains at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
Illustratively, each third phase energy storage sub-module 32 contains at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
If the energy storage system for 900V/1.25MW is composed of 9 submodules, the rated voltage of a submodule direct-current battery cluster is 614.4V (192 batteries with 3.2V are connected in series), if the system energy is 2.5MWh, the attenuation characteristic of the battery is considered, and the battery capacity margin is considered to be 20%, the capacity of the battery on the submodule side needs to reach 546Ah, at present, the parallel connection of the batteries is realized by adopting a DC/DC module if the batteries with large capacity do not exist and need to be considered to be connected in parallel; if the system energy is 1.25MWh, the attenuation characteristic of the battery is considered, and the battery capacity margin is considered to be 20%, the capacity of the battery on the sub-module side needs to reach 272Ah, and if the battery with the large capacity is available at present, the sub-module does not need to adopt a DC/DC converter (the DC/DC converter is short-circuited).
If the direct-current side voltage is 600V, the rated voltage of the single batteries is 3.2V, each battery pack is formed by connecting 48 batteries in series, the number of the required battery packs is M & ltgtor & gt 600/(3.2 x 48) & gt 3.9, meanwhile, whether the voltage range of the battery cluster is in the DC/DC voltage range or not is checked, the maximum voltage operation range of the single batteries is 2.8-3.6V, if the number of the battery packs is 4, the maximum voltage operation range of the battery cluster is 537.6-691.2V, the maximum voltage operation range of the battery cluster is not more than 750V, each battery cluster is formed by 4 battery packs, and each battery pack is formed by connecting 48 batteries in series.
Illustratively, each first phase energy storage sub-module 12, each second phase energy storage sub-module 22, and each third phase energy storage sub-module 32 is respectively installed in one energy cabinet; each energy cabinet contains two compartments, one for housing battery cluster equipment and one for housing other equipment.
Based on compact integration and independent modular design, each sub-module (the structure of each first phase energy storage sub-module 12, each second phase energy storage sub-module 22 and each third phase energy storage sub-module 32 are the same, collectively referred to as sub-modules) is arranged in 1 independent energy cabinet body, as shown in fig. 6. The width of the cabinet body is generally 1.1-1.5 m, the depth of the cabinet body is generally 1.1-1.3 m, and the height of the cabinet body is generally 2.2-2.5 m. The battery clusters are arranged in the independent compartments of the cabinet body according to different operating environments and different dangerousness of the battery clusters, the H-bridge module, the DC/DC module, the filtering loop and other auxiliary facilities such as fire fighting facilities, air conditioners, switching facilities and measuring facilities.
The battery cluster, the H-bridge module and the DC/DC module can adapt to an air cooling scheme or a water cooling scheme.
Illustratively, the angle-type modular power storage system further comprises a battery cluster management module; the battery cluster management module is in communication connection with the battery management unit of each battery cluster.
Generally, a BMU (battery management unit) in a battery cluster measures voltage and temperature of a battery, and sends a signal to a BCMU (battery cluster management unit), and the BCMU and the battery cluster management module perform information interaction in a communication manner.
Note that the BCMU does not exist directly within the battery cluster. Will typically be located in close proximity to the battery cluster.
In practical application, a filtering device on the alternating current side and a control protection facility of the energy storage system are integrated in a control cabinet body. The width of the cabinet body is generally 1.1-1.5 m, the depth of the cabinet body is generally 1.1-1.3 m, and the height of the cabinet body is generally 2.2-2.5 m.
1 energy storage system (1.25 ~ 2.5MW) can constitute by a plurality of energy cabinets and 1 switch board, and a plurality of energy cabinets body cascade to cross on the exchange bus in the switch board behind the filter equipment through the central control cabinet. The cabinets of an energy storage system may be arranged in a single-row arrangement, such as shown in fig. 7, in a double-row arrangement, such as shown in fig. 8, back-to-back, etc. The arrangement scheme can be flexibly adjusted according to the field requirement.
In summary, the angle-type modular power energy storage system proposed in the above embodiments has the following advantages:
firstly, the reliability is high, a single submodule has faults, no matter an H-bridge module, a DC/DC module or a battery, a fault submodule is automatically bypassed, only 1/3N unit energy storage capacity is lost, 3N is the total number of the submodules in the system, and N is the number of the submodules of each phase;
secondly, the energy utilization rate is high, the battery clusters are cascaded through the H-bridge, the short-plate battery only affects the sub-module of the cluster, and the normal output of other sub-modules is not affected;
thirdly, the expansibility is good, and due to the adoption of a modular cascade structure, the increase capacity or the boost voltage is changed, and the realization can be realized by changing the number of the sub-modules;
fourthly, the alternating current side has good adaptability, and three phases of the adopted topological structure are relatively independent, so that split-phase control can be realized when the voltage of the alternating current system is unbalanced;
fifthly, the balance degree of the alternating current three phases is good, the submodule only influences the energy storage capacity of the unit after bypassing, but the three-phase current and the capacity of the access side of the alternating current system are still balanced;
sixthly, the energy density is high, the sub-modules are compactly integrated in the cabinet body, limited space is utilized to the maximum extent, the space required by installation and maintenance of a single cabinet body is small, and the energy density of the energy storage station is high;
seventh, the voltage matching is high, and the DC/DC module can match the voltage of the battery cluster with the input direct current voltage of the H-bridge module; because the voltage is correspondingly reduced when the energy of the battery cluster is reduced, the voltage needs to be adjusted to adapt to the system change;
eighth, the safety is good, the sub-modules are arranged in the independent cabinet body, the influence among the sub-modules can be effectively isolated, the fault is isolated, and the accident range is reduced;
ninth, the transportation, the installation and the maintenance are convenient, the cabinet body is small and exquisite in scheme and light in weight;
tenth, arrange in a flexible way, adopt the cabinet body scheme, can single-row formula, back-to-back, multiseriate formula arrange, nimble adaptation site conditions.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. An angle-type modularized electric energy storage system is characterized by comprising a first phase energy storage and conversion module, a second phase energy storage and conversion module and a third phase energy storage and conversion module; the input end of the first phase energy storage and conversion module is connected with the output end of the third phase energy storage and conversion module, and the output end of the first phase energy storage and conversion module is connected with the input end of the second phase energy storage and conversion module; the output end of the second phase energy storage and conversion module is connected with the input end of the third phase energy storage and conversion module; the input end of the first-phase energy storage and conversion module, the input end of the second-phase energy storage and conversion module and the input end of the third-phase energy storage and conversion module are respectively connected with one phase of an external three-phase alternating current power grid;
the first phase energy storage converter module comprises a first filtering device and a plurality of first phase energy storage sub-modules; the second phase energy storage and conversion module comprises a second filtering device and a plurality of second phase energy storage submodules; the third phase energy storage current transformation module comprises a third filtering device and a plurality of third phase energy storage sub-modules; the first phase energy storage and conversion module, the second phase energy storage submodule and the third phase energy storage submodule are the same in number.
2. The angular modular power storage system of claim 1, wherein the first filtering means is coupled to one of the first phase energy storage sub-modules, the first phase energy storage sub-modules being coupled end-to-end.
3. The angular modular power storage system of claim 1, wherein the second filtering means is connected to one of the second phase energy storage sub-modules, the second phase energy storage sub-modules being connected end-to-end.
4. The angle-type modular power storage system of claim 1, wherein the third filtering means is connected to a third phase energy storage sub-module of the plurality of third phase energy storage sub-modules, the plurality of third phase energy storage sub-modules being connected end-to-end.
5. The angle-type modular power storage system of claim 1, wherein each first phase energy storage sub-module comprises at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
6. The angle-type modular power storage system of claim 1, wherein each second phase energy storage sub-module comprises at least one voltage conversion module and an H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
7. The angle-type modular power storage system of claim 1, wherein each third phase energy storage sub-module comprises at least one voltage conversion module and one H-bridge module; each voltage conversion module includes a battery cluster, a filter loop, and a DC/DC converter.
8. The angle-type modular power storage system of claim 1, wherein each of the first phase energy storage sub-modules, each of the second phase energy storage sub-modules, and each of the third phase energy storage sub-modules are mounted in a respective one of the energy cabinets; each energy cabinet contains two compartments, one for housing battery cluster equipment and the other for housing other equipment.
9. The angle modular power storage system according to any one of claims 5-7, further comprising a battery cluster management module; the battery cluster management module is in communication connection with the battery management unit of each battery cluster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013057.XA CN114465255A (en) | 2022-01-06 | 2022-01-06 | Angle-shaped modular electric energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013057.XA CN114465255A (en) | 2022-01-06 | 2022-01-06 | Angle-shaped modular electric energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114465255A true CN114465255A (en) | 2022-05-10 |
Family
ID=81409932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210013057.XA Pending CN114465255A (en) | 2022-01-06 | 2022-01-06 | Angle-shaped modular electric energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114465255A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199630A (en) * | 2013-03-13 | 2013-07-10 | 中国南方电网有限责任公司调峰调频发电公司 | High-capacity medium voltage battery energy storage system |
| CN103580048A (en) * | 2013-10-12 | 2014-02-12 | 上海交通大学 | Chained battery energy storage system integrated with active power filter |
| CN209344797U (en) * | 2018-10-26 | 2019-09-03 | 南方电网科学研究院有限责任公司 | A kind of single-stage chain type energy accumulation current converter and energy-storage system |
-
2022
- 2022-01-06 CN CN202210013057.XA patent/CN114465255A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199630A (en) * | 2013-03-13 | 2013-07-10 | 中国南方电网有限责任公司调峰调频发电公司 | High-capacity medium voltage battery energy storage system |
| CN103580048A (en) * | 2013-10-12 | 2014-02-12 | 上海交通大学 | Chained battery energy storage system integrated with active power filter |
| CN209344797U (en) * | 2018-10-26 | 2019-09-03 | 南方电网科学研究院有限责任公司 | A kind of single-stage chain type energy accumulation current converter and energy-storage system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2810353B1 (en) | Dc connection scheme for windfarm with internal mvdc collection grid | |
| Soong et al. | Evaluation of emerging modular multilevel converters for BESS applications | |
| US9899867B2 (en) | DC power server for a DC microgrid | |
| Xu et al. | DC voltage control and power dispatch of a multi-terminal HVDC system for integrating large offshore wind farms | |
| EP2650998B1 (en) | Cascade converter station and multi-end cascade hvdc power transmission system | |
| CN108923409B (en) | DC power supply system | |
| US11196291B2 (en) | Data center with backup power system | |
| CN102593884B (en) | Battery system and the energy storage system comprising it | |
| WO2002027892A1 (en) | Local area grid for distributed power | |
| WO2018193395A1 (en) | A system and a method for providing uninterrupted power in a microgrid system | |
| CN116888010A (en) | Energy storage system and method employing a secondary life electric vehicle battery | |
| CN114465255A (en) | Angle-shaped modular electric energy storage system | |
| US20220216716A1 (en) | Plug-in type energy storage system | |
| KR20230121045A (en) | Multiport Energy Routing System | |
| US11296546B2 (en) | Systems and methods for supplying uninterruptible power | |
| Bhuyan et al. | Contingency analysis of low voltage DC microgrid | |
| CN219372026U (en) | Charging switching device and charging system | |
| New et al. | A rack mounted complete DC power system | |
| US20230207937A1 (en) | Reconfigurable architecture for stationary energy storage system | |
| KR102436391B1 (en) | Grid-connected solar power generation control system with ESS | |
| Turner et al. | A new UPS topology for multi-megawatt medium voltage power protection | |
| GB2622580A (en) | Power distribution system | |
| WO2024052083A1 (en) | Power distribution system for data centre | |
| CN118054388A (en) | Three-stage uninterrupted power supply mode control system and method based on direct-current power supply system | |
| Joseph et al. | Microgrid architecture for distributed generation: Issues and challenges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |