KR20160147430A - Power Converter For The Micro-grid Specific Hybrid BESS - Google Patents
Power Converter For The Micro-grid Specific Hybrid BESS Download PDFInfo
- Publication number
- KR20160147430A KR20160147430A KR1020150084166A KR20150084166A KR20160147430A KR 20160147430 A KR20160147430 A KR 20160147430A KR 1020150084166 A KR1020150084166 A KR 1020150084166A KR 20150084166 A KR20150084166 A KR 20150084166A KR 20160147430 A KR20160147430 A KR 20160147430A
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- South Korea
- Prior art keywords
- bess
- power
- control
- grid
- power conversion
- Prior art date
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004146 energy storage Methods 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 230000007774 longterm Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000007599 discharging Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
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
- H02J3/28—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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- H02J3/382—
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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
- Y02E40/10—Flexible AC transmission systems [FACTS]
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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
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power conversion apparatus for a hybrid BESS (Battery Energy Storage System) and a control method thereof, and more particularly, The present invention relates to a power conversion apparatus for a hybrid BESS and a control method thereof, which are specially designed for a micro grid, which operates stably in independent mode / coupled mode for uninterruptible power supply without a high-speed switching switch.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power conversion apparatus for a hybrid BESS (Battery Energy Storage System), and more particularly, The present invention relates to a micro-grid-specific power converter for a hybrid BESS that operates stably in independent / coupled mode for uninterruptible power supply without a switch.
ESS (Energy Storage System) refers to a technology that stores electricity and energy in the electric power grid (Grid) to supply the remaining power and energy when and where it is needed.
More specifically, the ESS is a system for storing power generated by a power plant in a large secondary battery without directly transmitting it to a home or factory, When electricity demand is low, it stores surplus energy and supplies power in case of overload or emergency, thereby improving power quality and efficiency of energy use, increasing supply of renewable energy (solar, wind, tidal power) (See FIG. 1) as a storage system for efficiently predicting and controlling supply and drainage.
ESS (Energy Storage System) is composed of PCS (Power Conversion System), BMS (Battery Management System) and EMS (Energy Management System) for conversion and management of production power besides battery. PCS (Power Conversion System) The BMS (Battery Management System) is a device that controls the charging and discharging of the battery safely. The EMS (Energy Management System) Is a device that controls and monitors the production / conversion / consumption of power.
The ESS can be divided into household power storage system, industrial commercial medium power storage system, and high capacity power storage system installed in power plant and substation. It can be divided into long-term type and short-term type. same.
Short-term storage is a relatively small scale (several kWh) household storage, a megawatt (MW) class device that can adjust the frequency or voltage fluctuations of rapid power, long storage stores the late night power, It is a device that makes it possible to use it under load.
The short-term storage device has the effect of reducing the facility investment such as the construction cost of the power plant and the installation cost of the transmission line through peak load sharing (Peak Sharing). On the other hand, the long-term storage device stores the load leveling, that is, the idle power at night, and optimizes the power operation by using it during the week during overload.
In addition, as the ratio of new and renewable energy generation increases without energy storage, it becomes clear that the demand for such a power storage device will increase sharply as a factor stabilizing the instability of the power network as the whole power network becomes unstable . Therefore, it is urgently required to study and develop such long - term and short - term storage devices.
Among the constituent elements of the ESS, the battery is responsible for storing energy, and the battery used therein is a rechargeable secondary battery. Referring to FIG. 2, such a secondary battery has a wide variety of characteristics.
Lithium-ion batteries among power storage rechargeable batteries have a cycle life of more than 3,000 cycles and can be started immediately after stopping, which is suitable for short-cycle ESS for power stabilization of new and renewable energy.
In addition, lead acid batteries have the lowest merit among power storage rechargeable batteries with different prices, but have a short cycle life of 3,000 or less and have a disadvantage that they are not suitable for frequent charging and discharging due to limitation of discharge depth.
The power conversion device for hybrid type power storage utilizing the above-described heterogeneous power storage device can be used in a stand-alone mode / connection mode for uninterruptible power supply without a high-speed changeover switch It is urgently required to develop a hybrid control type power conversion system because ESS is a core technology for smart grid implementation, the need for a power storage system for stable power supply is increasing, This is because the need for an energy storage system is growing in order to stabilize renewable power according to the prospect of expansion.
As for the micro grid, it is very difficult to supply 100% of the power to the island area where the micro grid is built.
Most of the residents of the island are engaged in fishing, and even though it is necessary to operate the dryer to dry the harvested aquatic products, it is difficult to turn on the lights even when you operate the dryer. It is a desperate business.
To this end, new and renewable energy sources such as solar and wind power are installed to increase the amount of electricity.
Therefore, it is urgently required to develop smart BESS that can save surplus electric power generated by new and renewable energy to improve the industrial and living environment of island residents, and to use stored electric power when auxiliary or renewable energy source can not be developed .
In consideration of the above circumstances, the present invention has been proposed in view of the above circumstances. In consideration of cost reduction and longevity improvement, a smart battery BSS has a small-capacity lithium ion battery capable of instantly starting a single-cell ESS having frequent charge / discharge cycles, The ESS is composed of a hybrid power storage device consisting of low-cost, high-capacity lead acid batteries. The ESS is designed to stabilize the power supply in the micro grid by the power conversion device for the hybrid BESS and its control method. By using a single power storage system, the ratio of renewable energy in the power grid is gradually increased, thereby reducing the quality of the power quality and achieving stable power supply in the micro grid type like island.
According to an aspect of the present invention, there is provided a power conversion apparatus for a hybrid BESS,
In the power conversion apparatus corresponding to the BESS (Battery Energy Storage System), the BESS is a system for combining
The BESS is characterized in that a lithium battery is used for a short-cycle ESS (Energy Storage System) for stabilizing the output of renewable energy, and a hybrid system using a lead-acid battery for a long-period ESS for load leveling in a micro grid.
The power conversion apparatus constitutes a control algorithm that allows the generator to operate in a stand-alone mode without operation of the change-over switch when the generator in the
The power conversion apparatus is used in a ship which drives all the power sources from a battery or to which a solar panel is applied.
The power conversion apparatus is driven by a three-phase grid-connected control scheme, and is controlled including bi-directional control between a system and a load and a PLL (Phase Locked Loop) technique.
The control scheme includes both the
And calculating an amount and a ratio of the dissimilar batteries included in the BESS and calculating the number of batteries in parallel with the load pattern.
The
The present invention stabilizes power supply in a micro grid by a power conversion device for a hybrid BESS specific to a micro grid and its control method, and utilizes a long-term type and a single-phase type power storage device to gradually increase the ratio of renewable energy in a power grid It reduces the power quality deficiency caused by the increase of the power consumption. It also enables stable power supply in the micro grid type such as island, as well as drastically reducing the diesel consumption of the existing diesel generator.
1 is a conceptual diagram of a smart grid.
2 is a view showing characteristics of a battery.
3 is a diagram showing a concept of a power conversion apparatus for a hybrid BESS according to the present invention.
4 is a diagram showing a concept including the use of the power conversion apparatus for a hybrid BESS according to the present invention.
5 is a diagram showing a control method of a power conversion apparatus for a hybrid BESS according to the present invention.
6 is a conceptual diagram showing each stage of a power conversion apparatus for a hybrid BESS according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
In the following description, the terms used in the present invention are defined in consideration of the functions of the present invention, and this may vary depending on the intention or custom of the user, operator, and the like. Quot; device "in the specification and claims.
According to an aspect of the present invention, there is provided a power conversion apparatus for a hybrid BESS,
In the power conversion apparatus corresponding to the BESS (Battery Energy Storage System), the BESS is a system for combining
The BESS is characterized in that a lithium battery is used for a short-cycle ESS (Energy Storage System) for stabilizing the output of renewable energy, and a hybrid system using a lead-acid battery for a long-period ESS for load leveling in a micro grid.
The power conversion apparatus constitutes a control algorithm that allows the generator to operate in a stand-alone mode without operation of the change-over switch when the generator in the
The power conversion apparatus is used in a ship which drives all the power sources from a battery or to which a solar panel is applied.
The power conversion apparatus is driven by a three-phase grid-connected control scheme, and is controlled including bi-directional control between a system and a load and a PLL (Phase Locked Loop) technique.
The control scheme includes both the
And calculating an amount and a ratio of the dissimilar batteries included in the BESS and calculating the number of batteries in parallel with the load pattern.
The
The problems to be solved by the present invention can be solved by the above-described power conversion device for a hybrid BESS specialized in a micro grid.
FIG. 1 is a conceptual diagram of a smart grid, FIG. 2 is a diagram showing the characteristics of a battery, FIG. 3 is a diagram showing a concept of a power conversion apparatus for a hybrid BESS according to the present invention, FIG. 5 is a view showing a control method of a power conversion apparatus for a hybrid BESS according to the present invention, and FIG. 6 is a conceptual diagram showing each stage of a power conversion apparatus for a hybrid BESS according to the present invention.
3, the present invention includes a lead-
In addition, according to the present invention, the short-period ESS
Referring to FIG. 4, it can be seen that the hybrid smart BESS power conversion apparatus according to the present invention can be used in areas such as a smart grid, micro grid, offshore wind power, photovoltaic power generation, electric propulsion vessel, and IDC.
Referring to FIG. 5, it can be seen that the
Referring to FIG. 6, the power conversion apparatus for a hybrid BESS according to the present invention includes a DC /
The present invention stabilizes power supply in a micro grid by a power conversion device for a hybrid BESS specific to a micro grid and its control method, and utilizes a long-term type and a single-phase type power storage device to gradually increase the ratio of renewable energy in a power grid It reduces the power quality deficiency caused by the increase of the power consumption. It also enables stable power supply in the micro grid type such as island, as well as drastically reducing the diesel consumption of the existing diesel generator.
100: lead acid battery 200: lithium battery
300: Long-period power converter 400: Single-pole power converter
500: Power converter for hybrid BESS
501: DC / AC stage in power conversion device 502: LCL filter
503: Critical load
601: constant voltage control 602: constant current control
700: grid
Claims (7)
The BESS is a system for combining lithium batteries and different types of batteries using lead acid batteries,
The BESS is composed of a hybrid system using a lithium battery as a short-cycle ESS (Energy Storage System) for stabilizing the output of renewable energy and a lead acid battery as a long-term ESS for load leveling in a micro grid. Power conversion device for BESS.
Wherein the power converter comprises a control algorithm for allowing the grid generator to operate in a stand-alone mode without operation of the changeover switch when the generator in the grid is abnormal.
Wherein the power conversion apparatus is used for a ship that drives all the power sources from a battery or a solar panel.
Wherein the power conversion apparatus is driven by a three-phase grid-connected control scheme, and is controlled to include bi-directional control between a system and a load and a PLL (Phase Locked Loop) technique.
Wherein the control scheme includes both a constant voltage control and a constant current control, and includes a PI control and a Min Max control for each control, and controls the power control for the hybrid BESS.
And calculating the capacity and the ratio of the dissimilar batteries included in the BESS and calculating the number of batteries connected in series according to the load pattern.
Wherein the power converter includes an LCL filter at a location where the power converter is connected to the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150084166A KR20160147430A (en) | 2015-06-15 | 2015-06-15 | Power Converter For The Micro-grid Specific Hybrid BESS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150084166A KR20160147430A (en) | 2015-06-15 | 2015-06-15 | Power Converter For The Micro-grid Specific Hybrid BESS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160147430A true KR20160147430A (en) | 2016-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150084166A KR20160147430A (en) | 2015-06-15 | 2015-06-15 | Power Converter For The Micro-grid Specific Hybrid BESS |
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| Country | Link |
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| KR (1) | KR20160147430A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190069718A (en) * | 2017-12-12 | 2019-06-20 | 학교법인 송원대학교 | How To Operate With Speed Control Algorithm To Meet Charged Amount In A Wireless Power Transmission The Wireless Tram System |
| WO2023004196A1 (en) * | 2021-07-23 | 2023-01-26 | Apparent Labs, LLC | Bidirectional waveform shaping for grid-tied applications |
| US11942818B2 (en) | 2022-03-29 | 2024-03-26 | Schneider Electric It Corporation | Arrangement of converters and fast switches to provide BESS and UPS combined function |
-
2015
- 2015-06-15 KR KR1020150084166A patent/KR20160147430A/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190069718A (en) * | 2017-12-12 | 2019-06-20 | 학교법인 송원대학교 | How To Operate With Speed Control Algorithm To Meet Charged Amount In A Wireless Power Transmission The Wireless Tram System |
| WO2023004196A1 (en) * | 2021-07-23 | 2023-01-26 | Apparent Labs, LLC | Bidirectional waveform shaping for grid-tied applications |
| US11942818B2 (en) | 2022-03-29 | 2024-03-26 | Schneider Electric It Corporation | Arrangement of converters and fast switches to provide BESS and UPS combined function |
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| E601 | Decision to refuse application |