JP2002078206A - Battery power storage system - Google Patents
Battery power storage systemInfo
- Publication number
- JP2002078206A JP2002078206A JP2000259295A JP2000259295A JP2002078206A JP 2002078206 A JP2002078206 A JP 2002078206A JP 2000259295 A JP2000259295 A JP 2000259295A JP 2000259295 A JP2000259295 A JP 2000259295A JP 2002078206 A JP2002078206 A JP 2002078206A
- Authority
- JP
- Japan
- Prior art keywords
- power
- secondary battery
- battery
- storage system
- power storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/10—Applications of fuel cells in buildings
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電池電力貯蔵システ
ムに関し、例えば、配電系統において、二次電池の充放
電によりピーク電力を低減化することにより電力の平準
化を行う電池電力貯蔵システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery power storage system, for example, a battery power storage system in a power distribution system for leveling power by reducing peak power by charging and discharging a secondary battery.
【０００２】[0002]
【従来の技術】例えば、配電系統に用いられる電池電力
貯蔵システムは、図２に示すように負荷１を系統電源２
と連系させた配電系統において、遮断器３及び連系変圧
器４を介して電力変換器５を接続し、その電力変換器５
の直流側に直流遮断器６を介して鉛電池などの二次電池
７を接続した構成を具備し、その二次電池７の充放電に
より負荷電力の平準化を実現するものである。2. Description of the Related Art For example, a battery power storage system used in a distribution system includes a load 1 and a system power supply 2 as shown in FIG.
In the distribution system interconnected with the power converter 5, the power converter 5 is connected via the circuit breaker 3 and the interconnection transformer 4, and the power converter 5
And a secondary battery 7 such as a lead battery connected to the DC side via a DC circuit breaker 6 to achieve leveling of load power by charging and discharging the secondary battery 7.
【０００３】なお、電力変換器５は、インバータ機能と
整流機能を有する双方向形交直変換器で、系統母線８か
らの交流電力を直流変換して二次電池７に充電する整流
運転と、二次電池７に充電された直流電力を交流変換し
て系統母線８に供給するインバータ運転とに切り換え制
御される。The power converter 5 is a bidirectional AC / DC converter having an inverter function and a rectifying function. The power converter 5 performs a rectifying operation for converting AC power from the system bus 8 into DC and charging the secondary battery 7. The operation is switched to an inverter operation in which the DC power charged in the secondary battery 7 is converted to AC and supplied to the system bus 8.
【０００４】例えば負荷１である電力需要家における１
日の電力パターンは、例えばＰＭ１〜４時頃の重負荷時
間帯に電力ピークとなるような特性を有する。そのた
め、電池電力貯蔵システムでは、深夜並びに軽負荷時間
帯（例えばＡＭ８時〜ＰＭ１時、ＰＭ５時〜１０時頃）
に電力変換器５の整流運転により二次電池７を充電し、
その二次電池７の充電電力を重負荷時間帯（例えばＰＭ
１〜４時頃）に電力変換器５のインバータ運転により放
電して、その二次電池７の放電電力を負荷１に供給す
る。このように二次電池７の放電電力をピークシフトす
ることでピーク電力を低減することにより、電力の平準
化を実現している。[0004] For example, 1
The power pattern of the day has such a characteristic that the power peaks during a heavy load time period, for example, around 1 to 4 PM. Therefore, in the battery power storage system, at midnight and during a light load time period (for example, from 8:00 to 1:00 AM, from 5:00 to 10:00 PM)
To charge the secondary battery 7 by the rectification operation of the power converter 5,
The charging power of the secondary battery 7 is changed to a heavy load time zone (for example, PM
At about 1 to 4 o'clock), the power is discharged by the inverter operation of the power converter 5, and the discharge power of the secondary battery 7 is supplied to the load 1. As described above, the peak power is reduced by shifting the peak power of the discharge power of the secondary battery 7, thereby realizing power leveling.
【０００５】[0005]
【発明が解決しようとする課題】ところで、電池電力貯
蔵システムに使用される二次電池７として、前記鉛電池
以外に、電池電力貯蔵システムの大容量化に対応するこ
とが容易なレドックスフロー電池などの電解液循環型二
次電池がある。この電解液循環型二次電池（以下、単に
二次電池７と称す）は、電解液量を増やすことで容易に
電力貯蔵量を増大させることができて、大容量システム
用二次電池として高い実用性を備えている。As the secondary battery 7 used in the battery power storage system, besides the above-mentioned lead battery, a redox flow battery which can easily cope with an increase in the capacity of the battery power storage system is used. Electrolyte secondary battery. This electrolyte circulation type secondary battery (hereinafter simply referred to as a secondary battery 7) can easily increase the power storage amount by increasing the amount of the electrolyte, and is high as a secondary battery for a large capacity system. Has practicality.
【０００６】この二次電池７を電池電力貯蔵システムに
使用する場合、工場から出荷された未使用の新品の二次
電池７は、全く電位がない充放電不可能な状態にあるた
め、この二次電池７をそのまま電力変換器５の直流側に
接続して使用することができない。そのため、二次電池
７の新設時または交換時に電力変換器５の直流側に接続
された二次電池７を初期充電する必要がある。When this secondary battery 7 is used in a battery power storage system, an unused new secondary battery 7 shipped from a factory is in a state where charging and discharging cannot be performed without any potential. The secondary battery 7 cannot be directly connected to the DC side of the power converter 5 for use. Therefore, it is necessary to initially charge the secondary battery 7 connected to the DC side of the power converter 5 when newly installing or replacing the secondary battery 7.
【０００７】一方、電力変換器５では、直流電圧が一定
以上になるまで電力変換器５を構成するスイッチング素
子のスイッチング動作による電力制御ができないため、
その二次電池７を電力変換器５により初期充電すること
ができない。したがって、従来では、専用の充電器９を
電力変換器５の直流側に設け、その専用充電器９により
二次電池７を初期充電するようにしている。この初期充
電が完了すれば、スイッチ１０により専用充電器９を主
回路から切り離すことになる。このようにして二次電池
７を初期充電することにより、電力変換器５により二次
電池７の充放電が可能となる。On the other hand, the power converter 5 cannot perform power control by the switching operation of the switching elements constituting the power converter 5 until the DC voltage becomes equal to or higher than a certain value.
The secondary battery 7 cannot be initially charged by the power converter 5. Therefore, conventionally, a dedicated charger 9 is provided on the DC side of the power converter 5, and the secondary battery 7 is initially charged by the dedicated charger 9. When the initial charging is completed, the dedicated charger 9 is disconnected from the main circuit by the switch 10. The initial charging of the secondary battery 7 in this way allows the power converter 5 to charge and discharge the secondary battery 7.
【０００８】しかしながら、この二次電池７を初期充電
するためだけに高価な専用充電器９を設けていたので
は、電池電力貯蔵システム全体のコストアップを招来す
るという問題があった。However, if the expensive dedicated charger 9 is provided only for initial charging of the secondary battery 7, there is a problem that the cost of the whole battery power storage system is increased.
【０００９】そこで、本発明は前述の問題点に鑑みて提
案されたもので、その目的とするところは、二次電池の
初期充電を簡単な構成からなる安価な手段により行える
電池電力貯蔵システムを提供することにある。Accordingly, the present invention has been proposed in view of the above-mentioned problems, and an object of the present invention is to provide a battery power storage system capable of performing initial charging of a secondary battery by a simple and inexpensive means. To provide.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成するため
の技術的手段として、請求項１の発明は、系統電源と負
荷との間に連系用変圧器を介して接続された電力変換器
の直流側に充放電可能な二次電池を設け、その二次電池
に蓄積された電力を系統へ放電することにより、その放
電電力を負荷に供給してピーク電力を低減することによ
り電力の平準化を行う電池電力貯蔵システムにおいて、
前記二次電池の新設または交換時にその二次電池を初期
充電する定電圧変圧器を前記電力変換器の交流側に設け
たことを特徴とする。According to a first aspect of the present invention, there is provided a power converter connected between a system power supply and a load via an interconnection transformer. A chargeable and dischargeable secondary battery is installed on the DC side of the battery, and the power stored in the secondary battery is discharged to the system. The discharged power is supplied to the load to reduce the peak power, thereby leveling the power. Battery power storage system
A constant voltage transformer for initially charging the secondary battery when the secondary battery is newly installed or replaced is provided on the AC side of the power converter.
【００１１】請求項１の発明では、二次電池を初期充電
する手段として、簡単な構成からなる安価な定電圧変圧
器を使用する。この定電圧変圧器は、入力電圧が多少変
動しても一定の出力電圧を確保し得るものであり、定電
圧変圧器から出力される一定電圧を電力変換器の整流作
用により全波整流して、二次電池を初期充電する。この
二次電池の初期充電が完了すれば、電力変換器のスイッ
チング動作により充放電が可能となる。According to the first aspect of the present invention, an inexpensive constant voltage transformer having a simple structure is used as means for initially charging the secondary battery. This constant voltage transformer can secure a constant output voltage even if the input voltage fluctuates somewhat, and performs full-wave rectification of the constant voltage output from the constant voltage transformer by the rectifying action of the power converter. Then, the secondary battery is initially charged. When the initial charging of the secondary battery is completed, charging and discharging can be performed by the switching operation of the power converter.
【００１２】請求項２の発明のように前記定電圧変圧器
を二次電池の初期充電時のみ電力変換器の交流側に接続
するためのスイッチを設けることが望ましい。二次電池
の初期充電完了後には、前記スイッチにより定電圧変圧
器を主回路から切り離すことが可能となる。It is desirable to provide a switch for connecting the constant voltage transformer to the AC side of the power converter only at the time of initial charging of the secondary battery. After the completion of the initial charging of the secondary battery, the switch makes it possible to disconnect the constant voltage transformer from the main circuit.
【００１３】なお、前記二次電池としては、請求項３の
発明のようにレドックスフロー電池や亜鉛臭素電池など
の電解液循環型二次電池が使用可能であり、二次電池の
新設時や交換時に初期充電を必要とする二次電池が適用
される。As the secondary battery, an electrolyte-circulating secondary battery such as a redox flow battery or a zinc bromine battery can be used as in the third aspect of the present invention. Sometimes a secondary battery that requires an initial charge is applied.
【００１４】[0014]
【発明の実施の形態】本発明に係る電池電力貯蔵システ
ムの実施形態を以下に詳述する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a battery power storage system according to the present invention will be described in detail below.
【００１５】図１に示す実施形態の電池電力貯蔵システ
ムは、負荷１１を系統電源１２と連系させた配電系統に
おいて、遮断器１３及び連系変圧器１４を介して電力変
換器１５を接続し、それら電力変換器１５の直流側に直
流遮断器１６を介して電解液循環型二次電池１７（以
下、単に二次電池と称す）を接続した構成を具備し、そ
の二次電池１７の充放電により負荷電力の平準化を実現
するものである。The battery power storage system of the embodiment shown in FIG. 1 connects a power converter 15 via a circuit breaker 13 and a connection transformer 14 in a distribution system in which a load 11 is connected to a system power supply 12. And a configuration in which an electrolyte circulation type secondary battery 17 (hereinafter, simply referred to as a secondary battery) is connected to the DC side of the power converter 15 via a DC circuit breaker 16, and the charging of the secondary battery 17 is performed. This achieves leveling of the load power by discharging.
【００１６】前記電力変換器１５は、インバータ機能と
整流機能を有する双方向形交直変換器で、系統母線１８
からの交流電力を直流変換して二次電池１７に充電する
整流運転と、二次電池１７に充電された直流電力を交流
変換して系統母線１８に供給するインバータ運転とに切
り換え制御される。この電力変換器１５は、トランジス
タ等のスイッチング素子Ｔｒ1〜4と還流ダイオードＤ1
〜4によりブリッジ構成された主回路を有する。The power converter 15 is a bidirectional AC / DC converter having an inverter function and a rectifying function.
The switching control is performed between a rectifying operation in which the AC power from the DC is converted to DC and charging the secondary battery 17, and an inverter operation in which the DC power charged in the secondary battery 17 is converted to AC and supplied to the system bus 18. The power converter 15 is refluxed switching elements Tr 1 ~ 4, such as transistors, diodes D 1
Having a main circuit which is bridge configuration by 1-4.
【００１７】二次電池１７としては、レドックスフロー
電池や亜鉛臭素電池などがあり、これら二次電池は一つ
の例示であり、二次電池１７の新設時や交換時に初期充
電を必要とするものであれば適用可能である。例えば、
レドックスフロー電池は、最小単位電池である複数の単
セルを直並列接続した電池セルスタックと、その電池セ
ルスタックの各単セルに、バナジウムイオンを溶解させ
た硫酸水溶液などの正負二種類の電解液を循環させるタ
ンクユニットで構成される。Examples of the secondary battery 17 include a redox flow battery and a zinc bromine battery. These secondary batteries are merely examples, and require initial charging when the secondary battery 17 is newly installed or replaced. If applicable, it is applicable. For example,
A redox flow battery is a battery cell stack in which a plurality of unit cells, which are the minimum unit batteries, are connected in series and parallel. And a tank unit that circulates water.
【００１８】電池セルスタックの各単セルは、内部にイ
オン選択性隔膜で仕切られた正電極室と負電極室を有
し、各室内にカーボンフェルト等の正電極と負電極が設
置されている。すべての単セルの正負電極が電気的に直
列接続され、電解液流れに対して並列接続されている。
タンクユニットは正負二種類の電解液を電池セルスタッ
クとの間で循環可能に貯蔵するタンクと電解液強制循環
用ポンプを備えている。Each unit cell of the battery cell stack has a positive electrode chamber and a negative electrode chamber partitioned by an ion-selective diaphragm inside, and a positive electrode and a negative electrode such as carbon felt are installed in each chamber. . The positive and negative electrodes of all the single cells are electrically connected in series and connected in parallel to the electrolyte flow.
The tank unit is provided with a tank for storing two types of positive and negative electrolytes so as to be able to circulate between the battery cell stack and a pump for forced circulation of the electrolyte.
【００１９】前記二次電池１７では、各単セルを正負の
電解液が循環する間に、正負電解液間でレドックスイオ
ン反応が行われて、正電荷と負電荷のエネルギーが各タ
ンクの電解液に蓄積され、各単セルの正負一対の電極に
最小単位の数ボルト程度の直流電圧が生起される。In the secondary battery 17, a redox ion reaction occurs between the positive and negative electrolytes while the positive and negative electrolytes circulate in each unit cell, and the energy of the positive and negative charges is reduced by the electrolyte of each tank. And a DC voltage of several volts, which is the minimum unit, is generated at the pair of positive and negative electrodes of each single cell.
【００２０】この二次電池１７を電池電力貯蔵システム
に適用する場合には、システム効率を上げるために数ボ
ルト程度の単セルの多数を直並列接続して、全体の電池
電圧を必要な数百ボルトから数千ボルトまで高電圧化し
て必要な容量を確保している。二次電池１７は、電解液
量を増やすことで容易に電力貯蔵量を増大させることが
できて、大容量の電力系統に適用できる二次電池として
高い実用性を備える。When this secondary battery 17 is applied to a battery power storage system, a large number of single cells of several volts are connected in series / parallel in order to increase the system efficiency, and the total battery voltage is reduced to several hundreds of required. The required capacity is secured by increasing the voltage from volts to several thousand volts. The secondary battery 17 can easily increase the power storage amount by increasing the amount of the electrolyte, and has high practicality as a secondary battery applicable to a large-capacity power system.
【００２１】この実施形態の電池電力貯蔵システムで
は、前記二次電池１７の新設または交換時にその二次電
池１７を初期充電する定電圧変圧器１９を前記電力変換
器１５の交流側に設ける。また、この定電圧変圧器１９
を二次電池１７の初期充電時のみ電力変換器１５の交流
側に接続するためのスイッチ２０を設けている。In the battery power storage system of this embodiment, a constant voltage transformer 19 for initially charging the secondary battery 17 when the secondary battery 17 is newly installed or replaced is provided on the AC side of the power converter 15. In addition, this constant voltage transformer 19
Is connected to the AC side of the power converter 15 only when the secondary battery 17 is initially charged.
【００２２】定電圧変圧器１９は、図示しないが、電磁
鋼板を積層して構成した三脚状の鉄心の中央脚部に一次
および二次巻線と共振用コンデンサを備える共振用巻線
を巻回すると共に、前記中央脚部の一次巻線と二次巻線
との間に磁気分路鉄心を配置した構造を有する。Although not shown, the constant voltage transformer 19 is configured by winding a resonance winding having primary and secondary windings and a resonance capacitor around a central leg of a tripod-shaped iron core formed by laminating electromagnetic steel sheets. And a magnetic shunt core disposed between the primary winding and the secondary winding of the central leg.
【００２３】この定電圧変圧器１９では、鉄心、磁気分
路鉄心および磁気分路鉄心と鉄心の間に形成されるギャ
ップにより磁気回路を構成し、二次巻線のインダクタン
スとコンデンサによる並列共振回路が形成され、鉄心の
一次巻線側を磁束密度が不飽和の状態とする一方、二次
巻線側を飽和状態として二次巻線の出力電圧を一定に保
持する鉄共振型のもので、出力電圧として、例えば５０
Ｖ〜５０ｋＶ程度が得られる。In this constant voltage transformer 19, a magnetic circuit is constituted by an iron core, a magnetic shunt core, and a gap formed between the magnetic shunt cores and the iron core, and a parallel resonance circuit is formed by an inductance of a secondary winding and a capacitor. Is formed, while the magnetic flux density is in an unsaturated state on the primary winding side of the iron core, while the secondary winding side is in a saturated state and the output voltage of the secondary winding is kept constant, and is an iron resonance type. As the output voltage, for example, 50
About V to 50 kV can be obtained.
【００２４】この二次電池１７を電池電力貯蔵システム
に使用する場合、工場から出荷された未使用の新品の二
次電池１７は、全く電位がない充放電不可能な状態にあ
るため、この二次電池１７をそのまま電力変換器１５の
直流側に接続して使用することができない。そのため、
二次電池１７の新設時または交換時に電力変換器１５の
直流側に接続された二次電池１７を初期充電する必要が
ある。When this secondary battery 17 is used in a battery power storage system, the unused new secondary battery 17 shipped from the factory is in a state where charging and discharging cannot be performed without any potential. The secondary battery 17 cannot be directly connected to the DC side of the power converter 15 for use. for that reason,
When newly installing or replacing the secondary battery 17, it is necessary to initially charge the secondary battery 17 connected to the DC side of the power converter 15.
【００２５】この実施形態の電池電力貯蔵システムで
は、二次電池１７を初期充電する手段として、簡単な構
成からなる安価な定電圧変圧器１９を使用する。前述し
たように定電圧変圧器１９は、入力電圧が多少変動して
も一定の出力電圧を確保し得るものであるため、定電圧
変圧器１９から出力される一定電圧を電力変換器１５の
整流作用により全波整流して、二次電池１７を初期充電
する。In the battery power storage system of this embodiment, an inexpensive constant voltage transformer 19 having a simple configuration is used as means for initially charging the secondary battery 17. As described above, since the constant voltage transformer 19 can secure a constant output voltage even if the input voltage fluctuates somewhat, the constant voltage output from the constant voltage transformer 19 is rectified by the power converter 15. The full-wave rectification is performed to charge the secondary battery 17 initially.
【００２６】この二次電池１７の初期充電完了後には、
前記スイッチ２０により定電圧変圧器１９を主回路から
切り離す。このようにして二次電池１７の初期充電が完
了すれば、電力変換器１５のスイッチング動作により充
放電が可能となる。After the completion of the initial charging of the secondary battery 17,
The switch 20 disconnects the constant voltage transformer 19 from the main circuit. When the initial charging of the secondary battery 17 is completed as described above, charging and discharging can be performed by the switching operation of the power converter 15.
【００２７】例えば負荷１１である電力需要家における
１日の電力パターンは、例えばＰＭ１〜４時頃の重負荷
時間帯に電力ピークとなるような特性を有する。そのた
め、電池電力貯蔵システムでは、深夜並びに軽負荷時間
帯（例えばＡＭ８時〜ＰＭ１時、ＰＭ５時〜１０時頃）
に電力変換器１５の整流運転により二次電池１７を充電
し、その二次電池１７の充電電力を重負荷時間帯（例え
ばＰＭ１〜４時頃）に電力変換器１５のインバータ運転
により放電して、その二次電池１７の放電電力を負荷１
１に供給する。このように二次電池１７の放電電力をピ
ークシフトすることでピーク電力を低減することによ
り、電力の平準化を実現している。For example, the daily power pattern of the power consumer who is the load 11 has a characteristic such that the power peaks during a heavy load time period, for example, around 1 to 4 PM. Therefore, in the battery power storage system, at midnight and during a light load time period (for example, from 8:00 to 1:00 AM, from 5:00 to 10:00 PM)
The secondary battery 17 is charged by the rectification operation of the power converter 15, and the charging power of the secondary battery 17 is discharged by the inverter operation of the power converter 15 during a heavy load time period (for example, around PM1 to 4:00). , The discharge power of the secondary battery 17 is
Supply 1 As described above, the peak power is reduced by shifting the peak power of the discharge power of the secondary battery 17, thereby realizing power leveling.
【００２８】[0028]
【発明の効果】請求項１の発明によれば、系統電源と負
荷との間に連系用変圧器を介して接続された電力変換器
の直流側に充放電可能な二次電池を設け、その二次電池
に蓄積された電力を系統へ放電することにより、その放
電電力を負荷に供給してピーク電力を低減することによ
り電力の平準化を行う電池電力貯蔵システムにおいて、
前記二次電池の新設または交換時にその二次電池を初期
充電する手段として、簡単な構成からなる安価な定電圧
変圧器を使用することにより、電池電力貯蔵システムの
コスト低減化が図れる。According to the first aspect of the present invention, a chargeable / dischargeable secondary battery is provided on the DC side of a power converter connected between a system power supply and a load via an interconnection transformer, In a battery power storage system that discharges power stored in the secondary battery to the system, supplies the discharged power to a load, and reduces the peak power to level the power,
By using an inexpensive constant voltage transformer having a simple configuration as a means for initially charging the secondary battery when the secondary battery is newly installed or replaced, the cost of the battery power storage system can be reduced.
【００２９】また、請求項２の発明のように、前記定電
圧変圧器を二次電池の初期充電時のみ電力変換器の交流
側に接続するためのスイッチを設ければ、二次電池の初
期充電完了後に、定電圧変圧器を主回路から切り離すこ
とが簡単な手段で行える。According to the second aspect of the present invention, if a switch for connecting the constant voltage transformer to the AC side of the power converter only at the time of initial charging of the secondary battery is provided, the initial state of the secondary battery can be reduced. After charging is completed, the constant voltage transformer can be disconnected from the main circuit by simple means.
【００３０】さらに、請求項３の発明のように、電池電
力貯蔵システムの二次電池として、レドックスフロー電
池や亜鉛臭素電池などの電解液循環型二次電池が使用可
能であり、この電解液循環型二次電池についても初期充
電が可能となる。Further, as the secondary battery of the battery power storage system, an electrolyte circulation type secondary battery such as a redox flow battery or a zinc bromine battery can be used. Initial charging is also possible for the secondary battery.
【図１】本発明に係る電池電力貯蔵システムの実施形態
を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of a battery power storage system according to the present invention.
【図２】電池電力貯蔵システムの従来例を示す回路図で
ある。FIG. 2 is a circuit diagram showing a conventional example of a battery power storage system.
１１ 負荷 １２ 系統電源 １４ 連系用変圧器 １５ 電力変換器 １７ 二次電池（電解液循環型二次電池） １９ 定電圧変圧器 ２０ スイッチ DESCRIPTION OF SYMBOLS 11 Load 12 System power supply 14 Interconnection transformer 15 Power converter 17 Secondary battery (electrolyte circulation type secondary battery) 19 Constant voltage transformer 20 Switch
Claims (3)
介して接続された電力変換器の直流側に充放電可能な二
次電池を設け、その二次電池に蓄積された電力を系統へ
放電することにより、その放電電力を負荷に供給してピ
ーク電力を低減することにより電力の平準化を行う電池
電力貯蔵システムにおいて、前記二次電池の新設または
交換時にその二次電池を初期充電する定電圧変圧器を前
記電力変換器の交流側に設けたことを特徴とする電池電
力貯蔵システム。1. A chargeable / dischargeable secondary battery is provided on a DC side of a power converter connected between a system power supply and a load via an interconnection transformer, and power stored in the secondary battery is provided. In the battery power storage system that discharges power to the system to level the power by supplying the discharged power to the load and reducing the peak power, when the secondary battery is newly installed or replaced, A battery power storage system, wherein a constant voltage transformer for initial charging is provided on the AC side of the power converter.
時のみ電力変換器の交流側に接続するためのスイッチを
設けたことを特徴とする請求項１に記載の電池電力貯蔵
システム。2. The battery power storage system according to claim 1, further comprising a switch for connecting the constant voltage transformer to the AC side of the power converter only during initial charging of the secondary battery.
であることを特徴とする請求項１または２に記載の電池
電力貯蔵システム。3. The battery power storage system according to claim 1, wherein the secondary battery is an electrolyte circulation type secondary battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000259295A JP2002078206A (en) | 2000-08-29 | 2000-08-29 | Battery power storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000259295A JP2002078206A (en) | 2000-08-29 | 2000-08-29 | Battery power storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002078206A true JP2002078206A (en) | 2002-03-15 |
Family
ID=18747487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000259295A Withdrawn JP2002078206A (en) | 2000-08-29 | 2000-08-29 | Battery power storage system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002078206A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675707A (en) * | 2013-12-13 | 2014-03-26 | 国家电网公司 | Method for evaluating lithium ion battery peak power online |
| KR101418181B1 (en) | 2012-12-21 | 2014-07-09 | 넥스콘 테크놀러지 주식회사 | Energy storage system and controlling method of the same |
| CN108482166A (en) * | 2018-04-26 | 2018-09-04 | 常州信息职业技术学院 | A kind of control system improving new-energy automobile course continuation mileage |
| CN108649284A (en) * | 2018-04-26 | 2018-10-12 | 江苏工程职业技术学院 | A kind of battery pack voltage-stabilization control system of new-energy automobile |
| WO2019058850A1 (en) * | 2017-09-20 | 2019-03-28 | 住友電気工業株式会社 | Redox flow battery system |
-
2000
- 2000-08-29 JP JP2000259295A patent/JP2002078206A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101418181B1 (en) | 2012-12-21 | 2014-07-09 | 넥스콘 테크놀러지 주식회사 | Energy storage system and controlling method of the same |
| CN103675707A (en) * | 2013-12-13 | 2014-03-26 | 国家电网公司 | Method for evaluating lithium ion battery peak power online |
| CN103675707B (en) * | 2013-12-13 | 2016-01-20 | 国家电网公司 | Lithium ion battery peak power online evaluation method |
| WO2019058850A1 (en) * | 2017-09-20 | 2019-03-28 | 住友電気工業株式会社 | Redox flow battery system |
| CN108482166A (en) * | 2018-04-26 | 2018-09-04 | 常州信息职业技术学院 | A kind of control system improving new-energy automobile course continuation mileage |
| CN108649284A (en) * | 2018-04-26 | 2018-10-12 | 江苏工程职业技术学院 | A kind of battery pack voltage-stabilization control system of new-energy automobile |
| CN108482166B (en) * | 2018-04-26 | 2021-07-27 | 常州信息职业技术学院 | Control system for improving endurance mileage of new energy automobile |
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