CN111600321A - 10kV medium-voltage direct-hanging type energy storage power station system - Google Patents
10kV medium-voltage direct-hanging type energy storage power station system Download PDFInfo
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- CN111600321A CN111600321A CN202010365050.5A CN202010365050A CN111600321A CN 111600321 A CN111600321 A CN 111600321A CN 202010365050 A CN202010365050 A CN 202010365050A CN 111600321 A CN111600321 A CN 111600321A
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- 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
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- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a 10kV medium-voltage direct-hanging type energy storage power station system, and belongs to the field of energy storage power station design. The system comprises a 10KV energy storage power station front-end and a DC/DC bidirectional energy storage converter, wherein the 10KV energy storage power station front-end input end is directly connected with a 10kV power grid, and the DC/DC bidirectional energy storage converter is connected with the energy storage power station front-end output end; and the pre-stage of the 10KV energy storage power station and the DC/DC bidirectional energy storage converter perform two-stage conversion. The 10kV medium-voltage direct-hanging type energy storage power station system uses a power electronic technology, the 10kV energy storage power station front stage directly converts alternating current of a 10kV power grid into 750V direct current, and the direct current is converted into voltage required by an ultra-large battery pack through a DC/DC bidirectional energy storage converter. The method has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, bidirectional energy transmission and the like. The invention provides a 750V direct current interface, new energy and energy storage equipment can be directly accessed, an inverter stage is omitted, the efficiency is improved, and the cost is reduced; the energy distribution system has various communication interfaces, can realize the energy routing distribution function, and realize flexible power distribution and flexible access of new energy.
Description
Technical Field
The invention relates to the field of energy storage power station design, in particular to a 10kV medium-voltage direct-hanging type energy storage power station system.
Background
Conventional energy storage power plants are generally of the following construction: the power frequency transformer changes 10kV alternating current into 380V alternating current, and then the 380V alternating current is converted into direct current voltage required by the battery pack to be charged. When new energy and energy storage equipment are required to be accessed in an energy storage power station, direct current provided by the new energy and the energy storage equipment needs to be inverted into alternating current, and the defects of low conversion efficiency, large standby and no-load loss, large harmonic content, high maintenance cost and the like are caused.
Disclosure of Invention
In order to solve the problems, the invention provides a 10kV medium-voltage direct-hanging type energy storage power station system.
The invention provides the following technical scheme:
a10 kV medium-voltage direct-hanging type energy storage power station system comprises a 10kV energy storage power station front stage and a DC/DC bidirectional energy storage converter, wherein the front stage input end of the 10kV energy storage power station is directly connected with a 10kV power grid, and the DC/DC bidirectional energy storage converter is connected with the front stage output end of the energy storage power station; and the pre-stage of the 10KV energy storage power station and the DC/DC bidirectional energy storage converter perform two-stage conversion.
The 10kV medium-voltage direct-hanging type energy storage power station system uses a power electronic technology, the 10kV energy storage power station front stage directly converts alternating current of a 10kV power grid into 750V direct current, and the direct current is converted into voltage required by an ultra-large battery pack through a DC/DC bidirectional energy storage converter.
Preferably, the system does not have a power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
Preferably, the relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
Preferably, the system provides a flexible direct current interface for accessing new energy such as energy storage, photovoltaic, wind power and the like, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
Preferably, the system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
Compared with the prior art, the invention has the beneficial effects that: and the energy routing topology is adopted, so that the size and the weight of the whole machine are reduced, and the functions of self-detection, self-diagnosis, self-protection, self-recovery and the like of the whole machine are realized. Safe and reliable, and the state perception of the whole system is changed from 'timing maintenance' to 'state maintenance'. High efficiency, greatly reducing the capital recovery time of operators and improving the return on investment. An intelligent microgrid can be built, and the intelligent microgrid is adjustable and controllable, so that energy routing and ordered charging are realized, and the impact on a power grid is reduced. Low harmonic content, high-low voltage fault isolation, easy maintenance and bidirectional energy transmission.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a topological structure diagram of a 10kV medium-voltage direct-hanging energy storage power station;
FIG. 2 is an appearance structure diagram of a 10kV medium-voltage direct-hanging energy storage power station;
fig. 3 is a design diagram of a 10kV medium-voltage direct-hanging energy storage power station scheme.
Detailed Description
Hereinafter, embodiments of the present invention will be further described with reference to the accompanying drawings.
The invention provides a 10kV medium-voltage direct-hanging type energy storage power station system, which can be used in the field of design of 10kV medium-voltage direct-hanging type energy storage power stations and has the advantages of low harmonic content, high-low voltage fault isolation, easiness in maintenance, bidirectional energy transmission and the like.
The topology structure diagram of the 10kV medium-voltage direct-hanging energy storage power station applied by the invention is shown in figure 1, the appearance structure diagram is shown in figure 2, the scheme design diagram is shown in figure 3, and the scheme in figure 3 comprises the following steps:
a10 kV medium-voltage direct-hanging type energy storage power station system comprises a 10kV energy storage power station front stage and a DC/DC bidirectional energy storage converter, wherein the front stage input end of the 10kV energy storage power station is directly connected with a 10kV power grid, and the DC/DC bidirectional energy storage converter is connected with the front stage output end of the energy storage power station; and the pre-stage of the 10KV energy storage power station and the DC/DC bidirectional energy storage converter perform two-stage conversion.
The 10kV medium-voltage direct-hanging type energy storage power station system uses a power electronic technology, the 10kV energy storage power station front stage directly converts alternating current of a 10kV power grid into 750V direct current, and the direct current is converted into voltage required by an ultra-large battery pack through a DC/DC bidirectional energy storage converter.
The system has no power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
The relay protection device of the system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
The system provides a flexible direct current interface for accessing new energy such as energy storage, photovoltaic, wind power and the like, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
The system comprises: the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work; the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger; safety protection measures, condensation prevention and humidity control; and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. The basic idea of the present invention is similar to the above basic scheme, and it is obvious to those skilled in the art that the design of various modified models, formulas and parameters according to the guidance of the present invention does not require creative labor. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
Claims (5)
1. A10 kV medium-voltage direct-hanging type energy storage power station system is characterized by comprising a 10kV energy storage power station front-end and a DC/DC bidirectional energy storage converter, wherein the 10kV energy storage power station front-end input end is directly connected with a 10kV power grid, and the DC/DC bidirectional energy storage converter is connected with the energy storage power station front-end output end; the pre-stage of the 10KV energy storage power station and the DC/DC bidirectional energy storage converter are subjected to two-stage conversion;
the 10kV medium-voltage direct-hanging type energy storage power station system uses a power electronic technology, the 10kV energy storage power station front stage directly converts alternating current of a 10kV power grid into 750V direct current, and the direct current is converted into voltage required by an ultra-large battery pack through a DC/DC bidirectional energy storage converter.
2. The 10kV medium-voltage direct-hanging energy storage power station system according to claim 1, wherein the 10kV medium-voltage direct-hanging energy storage power station system is free of a power frequency transformer; the passive device is subverted into an intelligent controllable active device and is used for realizing self-detection, self-diagnosis, self-protection and self-recovery of the whole machine; a cascade H-bridge topology is adopted for solving the problem of insufficient voltage resistance of a single power electronic device (IGBT).
3. The 10kV medium-voltage direct-hanging energy storage power station system according to claim 1, wherein a relay protection device of the 10kV medium-voltage direct-hanging energy storage power station system adopts a two-stage lightning protection design; the power module N-2 is designed in a redundant mode, and a redundant mode is seamlessly switched; monitoring the online insulation of key devices; the double isolation is safer, the state of the whole system is sensed, and the state maintenance is changed from the timing maintenance.
4. The 10kV medium-voltage direct-hanging energy storage power station system according to claim 1, wherein the 10kV medium-voltage direct-hanging energy storage power station system provides a flexible direct-current interface for accessing new energy such as energy storage, photovoltaic and wind power, the new energy is consumed on the spot, and the utilization efficiency of the new energy is improved; the intelligent micro-grid system can be conveniently established by matching with an energy storage battery and an EMS system, the functions can be flexibly configured in specific occasions (such as high-speed service areas) and the utilization rate of an energy storage power station is improved.
5. The system of claim 1, wherein the 10kV medium voltage direct-hanging energy storage power station comprises:
the intelligent speed regulation fan system intelligently regulates speed, and the fan wheel patrols the work;
the power module unit is in modular design, is installed in a drawer mode, and is inserted and pulled out of a contact finger;
safety protection measures, condensation prevention and humidity control;
and low-loss standby, the power is partially dormant when in standby, and the standby power consumption is less than 500W.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010365050.5A CN111600321A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging type energy storage power station system |
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| CN202010365050.5A CN111600321A (en) | 2020-04-30 | 2020-04-30 | 10kV medium-voltage direct-hanging type energy storage power station system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421661A (en) * | 2020-11-09 | 2021-02-26 | 珠海格力电器股份有限公司 | Battery control system, energy storage system and control method thereof |
| CN114006391A (en) * | 2021-10-28 | 2022-02-01 | 山东泰开直流技术有限公司 | Medium-voltage direct-hanging energy storage converter system and start-stop control method thereof |
| CN114336701A (en) * | 2021-12-01 | 2022-04-12 | 国网江苏省电力有限公司盐城供电分公司 | Medium-voltage direct-hanging energy storage system topological structure suitable for high power and large capacity |
| CN114448228A (en) * | 2022-04-11 | 2022-05-06 | 南京力骏新能源储能研究院有限公司 | Redundancy control method and system of direct-hanging energy storage converter based on port voltage state discrimination |
| CN116413600A (en) * | 2023-03-14 | 2023-07-11 | 江苏东源电器集团股份有限公司 | Energy storage test system and test method thereof |
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| CN109066822A (en) * | 2018-07-18 | 2018-12-21 | 清华大学 | A kind of multi-point dispersion formula distribution system dispatching method based on electric power electric transformer |
| CN109301813A (en) * | 2018-11-30 | 2019-02-01 | 阳光电源（上海）有限公司 | A kind of fault control method, controller and mesohigh energy conversion system |
| CN109347357A (en) * | 2018-10-09 | 2019-02-15 | 特变电工新疆新能源股份有限公司 | A kind of four port electric power electric transformers |
| CN110690731A (en) * | 2019-08-20 | 2020-01-14 | 东南大学 | Power electronic transformer applicable to hybrid micro-grid and coordination control and mode switching method thereof |
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Patent Citations (5)
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| CN205544337U (en) * | 2016-04-20 | 2016-08-31 | 三峡大学 | City direct -current power distribution system suitable for new forms of energy and electric automobile insert |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421661A (en) * | 2020-11-09 | 2021-02-26 | 珠海格力电器股份有限公司 | Battery control system, energy storage system and control method thereof |
| CN114006391A (en) * | 2021-10-28 | 2022-02-01 | 山东泰开直流技术有限公司 | Medium-voltage direct-hanging energy storage converter system and start-stop control method thereof |
| CN114336701A (en) * | 2021-12-01 | 2022-04-12 | 国网江苏省电力有限公司盐城供电分公司 | Medium-voltage direct-hanging energy storage system topological structure suitable for high power and large capacity |
| CN114336701B (en) * | 2021-12-01 | 2023-11-24 | 国网江苏省电力有限公司盐城供电分公司 | Medium-voltage direct-hanging energy storage system topological structure suitable for high power and large capacity |
| CN114448228A (en) * | 2022-04-11 | 2022-05-06 | 南京力骏新能源储能研究院有限公司 | Redundancy control method and system of direct-hanging energy storage converter based on port voltage state discrimination |
| CN116413600A (en) * | 2023-03-14 | 2023-07-11 | 江苏东源电器集团股份有限公司 | Energy storage test system and test method thereof |
| CN116413600B (en) * | 2023-03-14 | 2024-01-30 | 江苏东源电器集团股份有限公司 | Energy storage test system and test method thereof |
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Application publication date: 20200828 |
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