WO2019107629A1 - Système de commande de puissance à structure matricielle pour système de stockage d'énergie hybride - Google Patents

Système de commande de puissance à structure matricielle pour système de stockage d'énergie hybride Download PDF

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Publication number
WO2019107629A1
WO2019107629A1 PCT/KR2017/014034 KR2017014034W WO2019107629A1 WO 2019107629 A1 WO2019107629 A1 WO 2019107629A1 KR 2017014034 W KR2017014034 W KR 2017014034W WO 2019107629 A1 WO2019107629 A1 WO 2019107629A1
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WO
WIPO (PCT)
Prior art keywords
bidirectional
converter
power
converters
batteries
Prior art date
Application number
PCT/KR2017/014034
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English (en)
Korean (ko)
Inventor
김명복
곽봉우
Original Assignee
한국생산기술연구원
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 한국생산기술연구원 filed Critical 한국생산기술연구원
Priority to PCT/KR2017/014034 priority Critical patent/WO2019107629A1/fr
Publication of WO2019107629A1 publication Critical patent/WO2019107629A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration

Definitions

  • the present invention relates to a configuration of a power control system for a hybrid type energy storage system capable of achieving high efficiency at a low cost by controlling a plurality of batteries using inverters having a capacity of less than 100 kW, And a n-type stack-up structure including a bidirectional converter are connected in series and in parallel and have a matrix structure and a grid-connected bidirectional power converter circuit (Grid Connected Bidirectional Inverter / Rectifier)
  • the present invention relates to a power control system technology of a matrix structure applicable to a hybrid energy storage system which is applicable to a system, and which is high in efficiency and easily variable in capacity.
  • the present invention relates to a configuration of a power control system for a hybrid type energy storage system capable of achieving high efficiency at a low cost by controlling a plurality of batteries using inverters having a capacity of less than 100 kW, And a n-type stack-up structure including a bidirectional converter are connected in series and in parallel and have a matrix structure and a grid-connected bidirectional power converter circuit (Grid Connected Bidirectional Inverter / Rectifier)
  • the present invention relates to a power control system technology of a matrix structure applicable to a hybrid energy storage system which is applicable to a system, and which is high in efficiency and easily variable in capacity.
  • a battery pack including a plurality of rechargeable batteries, a plurality of bidirectional converters connected in parallel to the plurality of batteries, and a bidirectional inverter connected to an output side of the plurality of bidirectional converters, And a bidirectional power conversion device, wherein the plurality of bidirectional converters are connected in series and the output side of the bidirectional power conversion device is connected to a power system.
  • the present invention relates to a configuration of a power control system for a hybrid type energy storage system capable of achieving high efficiency at a low cost by controlling a plurality of batteries using inverters having a capacity of less than 100 kW. So that the load on the high step-up ratio is small and the efficiency of the converter can be maximized by using the plurality of batteries in the parallel input stage so that the currents are the same even if the step-up ratios of the respective converters are different. It is easy to change the capacity according to the number of batteries and converters. It is applied to batteries having different kinds or characteristics and it is advantageous to apply to an energy storage system having a capacity of less than 100 kW.
  • FIG. 1 is a schematic diagram of a prior art power control system for an energy storage system.
  • FIG. 2 is a schematic diagram showing an embodiment of the power control system of the present invention.
  • FIG. 3 is a schematic diagram showing an embodiment of the power control system of the present invention.
  • FIG. 4 is a circuit diagram of a bidirectional converter using a full bridge circuit.
  • FIG. 5 is a circuit diagram of a bidirectional converter using a push-pull circuit.
  • FIG. 6 is a circuit diagram of a bidirectional converter using a full bridge circuit and a push-pull circuit.
  • FIG. 7 is a circuit diagram of a bidirectional converter using a push-pull circuit and a full bridge circuit.
  • FIG. 8 is a circuit diagram of a bidirectional converter using a flyback circuit.
  • a power control system includes a plurality of rechargeable batteries, a plurality of bidirectional converters connected in parallel to the plurality of batteries, and a bidirectional power converter connected to an output side of the plurality of bidirectional converters, Wherein the plurality of bi-directional converters are connected in series and parallel, and the output side of the bidirectional power conversion device is connected to a power system.
  • a prior art power control system for an energy storage system includes a battery 2, a bidirectional converter 3, a bidirectional power converter 4, a bidirectional inductor and an LCL filter 5 .
  • the power control system controls charging and discharging of the battery 2 by connecting the battery 2 and the power system 6.
  • the connections of the components are as follows.
  • the battery 2 is connected to a bidirectional converter 3, the bidirectional converter 3 is connected to a bidirectional power converter 4, and the bidirectional power converter includes a bidirectional inductor.
  • An LCL filter 5 circuit may be connected between the output side of the bidirectional power converter 4 and the power system 6.
  • the power control system of the present invention includes a battery, a bidirectional converter, and a bi-directional power conversion system.
  • the battery is rechargeable and may be multiple. Each battery is connected to a bidirectional converter.
  • a battery is a storage device that stores power supplied from a power control system.
  • the supplied power may be the power converted from the commercial power supplied from the power system.
  • the power stored in the battery can be supplied to the power system under the control of the power control system.
  • the battery discharges stored power, and one or more battery cells may be connected in series or in parallel to increase capacity and power.
  • the battery may be implemented in various types of battery cells, and may be a battery such as a nickel-cadmium battery, a lead acid battery, a nickel metal hydride battery (NiMH), a lithium ion battery, A lithium polymer battery, or the like.
  • the number of batteries may be determined according to the power capacity, design conditions, etc. required for the power control system.
  • a bidirectional converter is a power converter connected between a bidirectional power converter and a battery.
  • the bidirectional converter converts the DC power supplied through the bidirectional power converter to DC power of different magnitude and transfers the DC power to the battery. Further, the DC power stored in the battery is converted into DC power of different magnitude and transmitted to the bidirectional power converter.
  • the bi-directional converter converts the voltage of the bidirectional power conversion device into a DC voltage for storage in the battery, and converts the DC voltage stored in the battery to a voltage level for transfer to the bi-directional power conversion device.
  • the bidirectional converter operates as a buck converter that converts AC power supplied from the power system to DC power through a bidirectional power converter and then reduces the DC voltage level to the battery storage voltage when charging the battery.
  • the bidirectional converter operates as a boost converter that boosts the battery storage voltage to the DC link voltage level of the bidirectional power conversion apparatus when the power charged in the battery is supplied to the power system or load through the bidirectional power conversion apparatus.
  • the bidirectional power conversion apparatus may include a bidirectional inverter.
  • a bidirectional power conversion device is a power converter connected between a bidirectional converter and a power system.
  • the bidirectional inverter included in the bidirectional power conversion apparatus performs an inverter function of converting the direct current power output from the bidirectional converter into the alternating current power of the power system. Also, a commutation function of converting the commercial AC power supplied from the power system to the DC power and delivering it to the bidirectional converter is performed.
  • the bi-directional inverter rectifies and outputs the AC voltage input from the power system to a DC voltage for storing in the battery.
  • the DC voltage output from the bidirectional inverter battery is converted into an AC voltage of the power system and output.
  • the bidirectional inverter can also be connected to the output of the bidirectional inverter to remove harmonics from the AC voltage output to the power system, and can be used to limit voltage fluctuations, improve power factor, remove DC components, protect transient phenomena, Can be performed.
  • the filter may be a known LCL filter, an LC filter, or the like.
  • FIG. 2 a connection relationship between a battery, a bidirectional converter, a bidirectional power conversion system, a bidirectional inverter, and an LCL filter, which are components of the power control system of the present invention, will be described.
  • a bidirectional converter is connected in parallel to each of the plurality of batteries.
  • the bi-directional converters are connected in series to one bi-directional power conversion device.
  • the bidirectional power conversion apparatus includes a bidirectional inverter, and the output side is connected to the power system. At this time, an LCL filter circuit may be connected between the output side and the power system.
  • the components of the power control system of the present invention are connected as described above, since the required voltage can be generated according to the number of modules constituted by a pair of battery-bidirectional converters, it can be applied to different battery systems, It is easy. Applicable to hybrid energy storage systems. Also, in the case of a conventional bidirectional converter and a bi-directional power converter as in the prior art shown in FIG. 1, the voltage of the battery must be large or the voltage should be boosted at a high boost ratio using a bidirectional converter. When the voltage is increased at a high step-up ratio using a bidirectional converter, the efficiency of the bidirectional converter due to a high step-up ratio is deteriorated. However, if each converter is connected to each battery as shown in FIG. 2 and then connected to the bidirectional power converter by serially connecting the converters to each other, the burden on the relatively high boost ratio is small, Can be maximized.
  • the bidirectional converter may be a full bridge type insulated bidirectional converter using a known full bridge circuit as shown in FIG. On the input side of this bidirectional converter, it operates similar to a PSFB (Phase Shift Full Bridge) converter, and on the output side, current is passed through the Copack Diode of the IGBT module. Since the PSFB topology is relatively high in power conversion efficiency, the overall system efficiency is increased.
  • PSFB Phase Shift Full Bridge
  • the bidirectional converter may be a push-pull type insulated bidirectional converter using a known push-pull circuit as shown in FIG.
  • the bidirectional converter may be an insulated bidirectional converter using a full bridge circuit on the input side and a push-pull circuit on the output side as shown in FIG.
  • the bidirectional converter may be an insulated bidirectional converter using a push-pull circuit on the input side and a full bridge circuit on the output side as shown in FIG.
  • the bidirectional converter may be an isolated bidirectional converter using a known flyback circuit as shown in Fig.
  • the plurality of bi-directional converters of the power control system of the present invention may be connected to each other in series or in parallel.
  • the bidirectional converters may be connected in series and in parallel as shown in FIG. Even in this case, the bidirectional converters are connected to one bidirectional power converter.
  • the capacitive variable matrix structure has a structure capable of continuously supplying stable power to the inverter by disconnecting the converters connected in series at the time of FAIL of one bidirectional converter.
  • a plurality of batteries 20 and a plurality of converters 30 are provided, and each battery 20 is connected to each of the converters 30 in a one-to-one correspondence in parallel, and a plurality of converters 30 ) Are connected in series with each other. That is, the plurality of bidirectional converters are connected in series and parallel, and the plurality of bidirectional converters 30 are connected in series.
  • a plurality of power supply units are provided.
  • the power supply units thus provided are connected to each other in parallel, as shown in FIG. Specifically, a pair of converters located on the uppermost side of the adjacent power supply units and a pair of converters positioned on the lowermost side are mutually connected, and the adjacent power supply units are connected in parallel. As a result of mutual series connection and parallel connection, a plurality of bidirectional converters 30 are connected to each other in parallel.
  • the first aspect of the present invention is that since the rear ends of the converters are connected in series, the currents are the same even though the step-up ratios are different, so that the burden on the step-up ratio is small and the converter efficiency is maximized.
  • the power supply unit including the failed converter can be disconnected, so that the inverter can stably supply electric power. That is, the present invention has an advantage that power can be continuously supplied to the inverter using a normal power supply while repairing or replacing a failed converter when a failure occurs in a specific converter,
  • the present invention can have the first and second effects simultaneously by connecting the rear ends of the converters in series and simultaneously connecting the power supply units including the battery and the converters in parallel. That is, according to the present invention, since the power supply units are connected in parallel to each other and the converters included in the respective power supply units are connected in series, the burden on the high step-up ratio is small, and the converter and the battery can be easily replaced and repaired .

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention aborde le problème lié à un système de commande de puissance conventionnel pour un système de stockage d'énergie qui utilise un convertisseur élévateur afin de délivrer en sortie une puissance élevée, ce qui impose que la tension d'une batterie doit être élevée ou que la tension doit être augmentée à un taux d'élévation élevé, ce qui présente les inconvénients d'une taille accrue d'un système complet en raison d'une augmentation du nombre de batteries et d'une diminution du rendement d'un convertisseur bidirectionnel en raison d'un rapport d'élévation élevé. De plus, le système de commande de puissance conventionnel ne peut pas être appliqué à différents types de batteries et à différentes caractéristiques de batteries, et il n'est pas facile de modifier une capacité de manière variable. La solution selon la présente invention porte sur un système de commande de puissance comprenant : une pluralité de batteries rechargeables; une pluralité de convertisseurs bidirectionnels respectivement branchés en parallèle à la pluralité de batteries; et un système de conversion de puissance bidirectionnel connecté aux côtés de sortie de la pluralité de convertisseurs bidirectionnels et comprenant un onduleur bidirectionnel. La pluralité de convertisseurs bidirectionnels sont branchés en série les uns aux autres, et un côté de sortie du système de conversion de puissance bidirectionnel est connecté à un système d'alimentation.
PCT/KR2017/014034 2017-12-01 2017-12-01 Système de commande de puissance à structure matricielle pour système de stockage d'énergie hybride WO2019107629A1 (fr)

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PCT/KR2017/014034 WO2019107629A1 (fr) 2017-12-01 2017-12-01 Système de commande de puissance à structure matricielle pour système de stockage d'énergie hybride

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100012880A (ko) * 2007-06-28 2010-02-08 신덴겐코교 가부시키가이샤 양방향 ｄｃ/ｄｃ 컨버터
JP2010521720A (ja) * 2006-12-06 2010-06-24 ソーラーエッジ テクノロジーズ Ｄｃ電源を用いた分散型電力ハーベストシステム
US20150357940A1 (en) * 2011-12-16 2015-12-10 Empower Micro Inc. Bi-directional energy converter with multiple dc sources
KR101587333B1 (ko) * 2013-12-31 2016-01-21 공주대학교 산학협력단 고신뢰성 배터리 에너지 저장 장치
KR20160073664A (ko) * 2014-12-17 2016-06-27 블루에스(주) Bess 제어 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010521720A (ja) * 2006-12-06 2010-06-24 ソーラーエッジ テクノロジーズ Ｄｃ電源を用いた分散型電力ハーベストシステム
KR20100012880A (ko) * 2007-06-28 2010-02-08 신덴겐코교 가부시키가이샤 양방향 ｄｃ/ｄｃ 컨버터
US20150357940A1 (en) * 2011-12-16 2015-12-10 Empower Micro Inc. Bi-directional energy converter with multiple dc sources
KR101587333B1 (ko) * 2013-12-31 2016-01-21 공주대학교 산학협력단 고신뢰성 배터리 에너지 저장 장치
KR20160073664A (ko) * 2014-12-17 2016-06-27 블루에스(주) Bess 제어 장치

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