CN111934346A - Power station energy storage microgrid system - Google Patents
Power station energy storage microgrid system Download PDFInfo
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- CN111934346A CN111934346A CN202010746535.9A CN202010746535A CN111934346A CN 111934346 A CN111934346 A CN 111934346A CN 202010746535 A CN202010746535 A CN 202010746535A CN 111934346 A CN111934346 A CN 111934346A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 50
- 238000010248 power generation Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 17
- 239000000084 colloidal system Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000013486 operation strategy Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a power station energy storage microgrid system which comprises a distributed power supply power generation device, an energy storage device, a direct current load module, an alternating current load module, a conversion device, a microgrid control module, a microgrid protection module and a network communication module, the distributed power generation device is connected with the energy storage device through the conversion device, the distributed power generation device is connected with the alternating current load module through the conversion device, the invention relates to a power station energy storage micro-grid system, which is an alternating current and direct current mixed micro-grid, wherein wind, light, diesel and storage are comprehensively applied, the operating time of diesel is reduced as much as possible, the utilization rate of renewable energy sources and the service life of a battery are maximized through the optimized configuration of the energy storage system, the renewable energy sources are comprehensively utilized to the maximum in the aspect of energy scheduling to reduce diesel power generation, and meanwhile, the service characteristics of a storage battery are considered to maximize the service life of the battery.
Description
Technical Field
The invention relates to a microgrid system, in particular to a power station energy storage microgrid system, and belongs to the technical field of power station microgrids.
Background
With the construction of strong smart power grids, the development of power distribution networks plays a very important role in smart power grids. The distribution network has wide distribution, complex structure, wide influence range, and great influence on the economy and the society on the power supply capacity, the power supply reliability and the power supply quality. The tail ends of power distribution networks in rural areas, mountainous areas, islands and the like are poor in power supply capacity, poor in power quality and low in power supply reliability due to seasonal and periodic load fluctuation due to the fact that the grid structure is weak. Taking the Fujian province in the south-east coast of our country as an example, there are a large number of islands in the south-east coast of the country, users at the end of the distribution network are limited by geographical conditions such as topography, the reliability of power supply is lower, and in any natural disasters such as typhoon, freezing rain and the like, the distribution network has more even and frequent faults, often loses the main network power supply, and in addition, the distribution network is limited by topography, so that the emergency repair work of the distribution network is very inconvenient, the power supply is difficult to recover in a short time, and large-area power failure is. The typical power supply users at the end of the power distribution network in remote mountainous areas, islands and the like also commonly exist in other regions in China, so that the problems have certain representativeness and universality. In recent years, energy storage power stations become an effective means for peak load regulation and valley filling of a power distribution network, system stability improvement and demand side management realization.
In order to make full use of distributed power generation, a micro-grid concept is provided. The microgrid is a small-sized power generation and distribution system formed by collecting a distributed power supply, an energy storage device, an energy conversion device and related load, monitoring and protection devices, is an autonomous system capable of realizing self control, protection and management, and can be connected with a large power grid to run or run in an isolated mode. The existing research and practice shows that the distributed power supply system is connected to a large power grid in a micro-grid mode to run in a grid-connected mode and supports the large power grid, and the distributed power supply system is the most effective mode for exerting the efficiency of the distributed power generation and supply system; when the external power grid fault or the electric energy quality can not meet the requirement is monitored, the microgrid is switched into an island operation mode, a key load in the microgrid is continuously supplied with power by a distributed power supply in the microgrid, uninterrupted power supply of the load is guaranteed, and the balance of the supply and demand energy of the microgrid is maintained, so that the safety and the reliability of power supply are improved; and when the external power grid fault disappears or the electric energy quality meets the requirement, the micro-grid is switched to the networking operation mode again. The piconet controller needs to effect a smooth switch between the two modes depending on the changes in actual operating conditions.
When the microgrid distributed power supply is an energy storage system, due to the fact that the energy storage system is limited in electric quantity, long-time (such as tens of hours) isolated island operation cannot be achieved after a large power grid fails, and reasonable configuration and application of megawatt wind generating sets and solar photovoltaic power generation devices cannot be achieved simultaneously inside the microgrid in the prior art.
Disclosure of Invention
The invention aims to provide a power station energy storage microgrid system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a power station energy storage microgrid system, includes distributed generator power generation facility, energy memory, direct current load module, exchanges load module, conversion equipment, microgrid control module, microgrid protection module and network communication module and constitutes, its characterized in that, distributed generator power generation facility passes through conversion equipment and is connected with energy memory, distributed generator power generation facility passes through conversion equipment and exchanges load module and be connected, distributed generator power generation facility and direct current load module are connected.
Preferably, an energy storage controller is arranged between the energy storage unit and the conversion device, and the energy storage unit comprises a first storage battery pack and a second storage battery pack.
Preferably, the first storage battery pack and the second storage battery pack are valve-controlled sealed tubular colloid storage batteries, and the first storage battery pack and the second storage battery pack are both formed by connecting 240 single battery packs in series.
Preferably, the distributed power supply comprises a photovoltaic power supply, a wind power supply and an engine power supply.
Preferably, the photovoltaic power supply comprises two 50kW photovoltaic power generation groups, the wind power supply comprises seven 30kW wind power generation groups, and the engine power supply comprises a 100kW diesel generator and a 100kW standby diesel generator.
Preferably, the conversion device is an energy storage converter PCS, and the energy storage converter PCS is a 300KW energy storage converter PCS.
Preferably, the microgrid control module comprises a data processor, a communication server and a microgrid operation manager, the communication server is connected with the communication network, and the data processor and the microgrid operation manager are respectively connected with the communication server.
Preferably, the direct current load module and the alternating current load module are both connected with the direct current distribution line through a microgrid protection module, and the microgrid protection module is composed of a plurality of isolating switches.
Preferably, the photovoltaic power generation set, the first storage battery pack and the second storage battery pack are provided with DC/AC modules, one side of the DC/DC module of the photovoltaic power generation set is connected to a direct current distribution line, the other side is connected to the photovoltaic power generation set, one side of the DC/DC module of the first storage battery pack is connected to the direct current distribution line, the other side is connected to the first storage battery pack, one side of the DC/DC module of the second storage battery pack is connected to the direct current distribution line, and the other side is connected to the second storage battery pack.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a power station energy storage micro-grid system, which is an alternating current-direct current hybrid micro-grid, wherein wind, light, diesel and storage are comprehensively applied, the diesel engine running time is reduced as much as possible through the optimized configuration of an energy storage system, the utilization rate of renewable energy sources is maximized, the service life of a battery is prolonged, the renewable energy sources are comprehensively considered in the aspect of energy scheduling to be maximally utilized to reduce diesel power generation, and the service life of the battery is maximized while the service characteristics of a storage battery are considered.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic diagram of a distributed power supply according to the present invention;
FIG. 3 is a schematic structural diagram of an energy storage unit according to the present invention;
FIG. 4 is a schematic diagram of a photovoltaic power supply according to the present invention;
FIG. 5 is a schematic view of the wind power supply 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 to 5, the invention provides a power station energy storage microgrid system, which comprises a distributed power generation device, an energy storage device, a direct current load module, an alternating current load module, a conversion device, a microgrid control module, a microgrid protection module and a network communication module.
An energy storage controller is arranged between the energy storage unit and the conversion device, and the energy storage unit comprises a storage battery pack I and a storage battery pack II.
The first storage battery pack and the second storage battery pack are valve-controlled sealed tube type colloid storage batteries, and the first storage battery pack and the second storage battery pack are both formed by connecting 240 single battery packs in series.
The distributed power supply comprises a photovoltaic power supply, a wind power supply and an engine power supply.
The photovoltaic power supply consists of two 50kW photovoltaic power generation sets, the wind power supply consists of seven 30kW wind power generation sets, and the engine power supply consists of a 100kW diesel generator and a 100kW standby diesel generator.
The conversion device is an energy storage converter PCS, and the energy storage converter PCS is a 300KW energy storage converter PCS.
The microgrid control module comprises a data processor, a communication server and a microgrid operation manager, the communication server is connected with the communication network, and the data processor and the microgrid operation manager are respectively connected with the communication server.
The direct-current load module and the alternating-current load module are connected with a direct-current distribution line through the microgrid protection module, and the microgrid protection module is composed of a plurality of isolating switches.
The photovoltaic power generation set, the storage battery pack I and the storage battery pack II are all provided with a DC/AC module, one side of the DC/DC module of the photovoltaic power generation set is connected with a direct current distribution circuit, the other side of the DC/DC module of the storage battery pack I is connected with the photovoltaic power generation set, one side of the DC/DC module of the storage battery pack I is connected with the direct current distribution circuit, the other side of the DC/DC module of the storage battery pack II is connected with the storage battery pack II.
When the power station energy storage microgrid system is used specifically, the operation mode of the microgrid system can be divided into a PCS (Power System control) mode and a diesel generator mode, the PCS mode refers to a storage battery in the system as a main power supply, an energy storage converter GES-300 is independently inverted to perform V/F (voltage/frequency) control, a constant-voltage/constant-frequency alternating current power supply is provided for the system, the maximum power point tracking control of a photovoltaic battery pack is realized at the same time, the system load power consumption is mainly provided by a photovoltaic battery, a fan and a storage battery pack, when the output of the photovoltaic and the fan is smaller than the load, the difference capacity is provided by the storage battery pack I and the storage battery pack II, when the output of the photovoltaic and the fan is larger than the load, extra energy is used for charging the storage; the diesel generator mode refers to the mode that a diesel generator V/F operates to provide a constant-voltage/constant-frequency alternating current power supply for the system, the GES-300 operates PQ to charge a storage battery pack in a four-section mode, and simultaneously, the photovoltaic power point tracking control is performed, and the system generally operates according to the diesel generation mode when the SOC value of the storage battery is low.
The microgrid system works in a PCS mode or a diesel generation mode according to a set operation strategy on the basis of the current photovoltaic and fan output conditions, the SOC state of a storage battery and the load in the actual operation and the principle of effectively using new energy and reasonably using the storage battery, and the operation mode is automatically switched according to the change of the operation state in the system. The automatic operation of the microgrid system is mainly realized through the matched operation of an energy storage battery pack, a storage Battery Management System (BMS), an energy storage converter and a background monitoring system.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a power station energy storage microgrid system, includes distributed generator power generation facility, energy memory, direct current load module, exchanges load module, conversion equipment, microgrid control module, microgrid protection module and network communication module and constitutes, its characterized in that, distributed generator power generation facility passes through conversion equipment and is connected with energy memory, distributed generator power generation facility passes through conversion equipment and exchanges load module and be connected, distributed generator power generation facility and direct current load module are connected.
2. The power station energy storage microgrid system of claim 1, characterized in that: an energy storage controller is arranged between the energy storage unit and the conversion device, and the energy storage unit comprises a storage battery pack I and a storage battery pack II.
3. The power station energy storage microgrid system of claim 2, characterized in that: the storage battery pack I and the storage battery pack II are valve-controlled sealed tube type colloid storage batteries and are formed by connecting 240 single battery packs in series.
4. The power station energy storage microgrid system of claim 1, characterized in that: the distributed power supply comprises a photovoltaic power supply, a wind power supply and an engine power supply.
5. The power station energy storage microgrid system of claim 4, characterized in that: photovoltaic power supply comprises two 50 kW's photovoltaic power generation group, wind power supply comprises seven 30 kW's wind generating set, the engine power comprises a 100kW diesel generator and a 100kW reserve diesel generator.
6. The power station energy storage microgrid system of claim 1, characterized in that: the conversion device is an energy storage converter PCS, and the energy storage converter PCS is a 300KW energy storage converter PCS.
7. The power station energy storage microgrid system of claim 1, characterized in that: the microgrid control module comprises a data processor, a communication server and a microgrid operation manager, the communication server is connected with a communication network, and the data processor and the microgrid operation manager are respectively connected with the communication server.
8. The power station energy storage microgrid system of claim 1, characterized in that: the direct-current load module and the alternating-current load module are connected with the direct-current distribution line through the microgrid protection module, and the microgrid protection module is composed of a plurality of isolating switches.
9. The power station energy storage microgrid system of claim 5, characterized in that: the photovoltaic power generation set, the storage battery pack I and the storage battery pack II are all provided with DC/AC modules, one side of the DC/DC module of the photovoltaic power generation set is connected with a direct current distribution circuit, the other side of the DC/DC module of the storage battery pack I is connected with the photovoltaic power generation set, one side of the DC/DC module of the storage battery pack I is connected with the direct current distribution circuit, the other side of the DC/DC module of the storage battery pack II is connected with the storage battery pack I, one side of the DC/DC module of the storage battery pack II.
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| CN202010746535.9A CN111934346A (en) | 2020-07-29 | 2020-07-29 | Power station energy storage microgrid system |
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| CN202010746535.9A CN111934346A (en) | 2020-07-29 | 2020-07-29 | Power station energy storage microgrid system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904281A (en) * | 2012-10-25 | 2013-01-30 | 同济大学 | Micro-grid system for ships |
| CN103236712A (en) * | 2013-04-08 | 2013-08-07 | 嘉兴清源电气科技有限公司 | Direct-current micro-grid system and control method thereof |
| CN103595138A (en) * | 2013-11-21 | 2014-02-19 | 国网上海市电力公司 | Smart micro-grid system |
| CN104022528A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Method for micro-grid system coordinated control based on multi-element composite energy storage |
| KR20170037192A (en) * | 2015-09-25 | 2017-04-04 | 한국전기연구원 | The power conversion device embedded with EMS function and Micro-grid power system having the same |
| CN111049200A (en) * | 2019-12-17 | 2020-04-21 | 北京科诺伟业科技股份有限公司 | Intelligent regional micro-grid system and control method thereof |
-
2020
- 2020-07-29 CN CN202010746535.9A patent/CN111934346A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904281A (en) * | 2012-10-25 | 2013-01-30 | 同济大学 | Micro-grid system for ships |
| CN103236712A (en) * | 2013-04-08 | 2013-08-07 | 嘉兴清源电气科技有限公司 | Direct-current micro-grid system and control method thereof |
| CN103595138A (en) * | 2013-11-21 | 2014-02-19 | 国网上海市电力公司 | Smart micro-grid system |
| CN104022528A (en) * | 2014-06-12 | 2014-09-03 | 国家电网公司 | Method for micro-grid system coordinated control based on multi-element composite energy storage |
| KR20170037192A (en) * | 2015-09-25 | 2017-04-04 | 한국전기연구원 | The power conversion device embedded with EMS function and Micro-grid power system having the same |
| CN111049200A (en) * | 2019-12-17 | 2020-04-21 | 北京科诺伟业科技股份有限公司 | Intelligent regional micro-grid system and control method thereof |
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