JPH0865895A - Stabilizer in power system - Google Patents
Stabilizer in power systemInfo
- Publication number
- JPH0865895A JPH0865895A JP6198181A JP19818194A JPH0865895A JP H0865895 A JPH0865895 A JP H0865895A JP 6198181 A JP6198181 A JP 6198181A JP 19818194 A JP19818194 A JP 19818194A JP H0865895 A JPH0865895 A JP H0865895A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- power
- charging
- discharging
- battery
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は二次電池を用いた電力系
統安定化装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power system stabilizing device using a secondary battery.
【０００２】[0002]
【従来の技術】近年、電力需要はますます増大してきて
おり、また、電力系統も複雑化してきている。このた
め、電力を安定に送電する目的で系統安定化装置が必要
となり、これまでに様々な装置が考案されているが、電
力貯蔵装置を応用したものも幾つか考案されている。代
表的な例としては、例えば、特開平5−300674 号に記載
されているような、超電導エネルギー貯蔵装置（ＳＭＥ
Ｓ）がある。これは、交流系統に電力変換装置を介して
超電導コイルを接続し、超電導コイルに電力を貯蔵した
り、超電導コイルからあらかじめ貯蔵された電力を放出
させて、系統安定化を図るものである。2. Description of the Related Art In recent years, the demand for electric power has increased more and more, and the electric power system has also become complicated. For this reason, a system stabilizing device is required for the purpose of stably transmitting electric power, and various devices have been devised so far, but some devices to which a power storage device is applied have been devised. As a typical example, for example, a superconducting energy storage device (SME) as described in JP-A-5-300674.
There is S). In this system, a superconducting coil is connected to an AC system via a power converter, electric power is stored in the superconducting coil, or electric power stored in advance is discharged from the superconducting coil to stabilize the system.
【０００３】超電導エネルギー貯蔵装置では電力の貯蔵
用に超電導コイルを用いているが、超電導コイルの代わ
りにナトリウム−硫黄電池等の大容量の二次電池を用い
ても、同様の装置を作ることができる。Although a superconducting coil is used for storing electric power in a superconducting energy storage device, a similar device can be made by using a large capacity secondary battery such as a sodium-sulfur battery instead of the superconducting coil. it can.
【０００４】[0004]
【発明が解決しようとする課題】しかし、二次電池を用
いた装置の場合、通常は装置内の電池を一括して放電若
しくは充電させる方式のものである。この方式の場合、
装置の運用時の放電若しくは充電の速度が必ずしも高い
とは言えず、また、必要以上の容量の電池を用意してお
かなければならないといった問題があった。However, in the case of a device using a secondary battery, the battery in the device is usually discharged or charged all at once. In this case,
There is a problem that the discharging or charging speed during operation of the device is not necessarily high and that a battery having a capacity larger than necessary must be prepared.
【０００５】本発明の目的は、より少ない電池の容量
で、交流系統の状態の急激な変動に対応することが可能
な、二次電池を用いた系統安定化装置を提供することで
ある。An object of the present invention is to provide a system stabilizing device using a secondary battery, which can cope with a rapid change in the state of an AC system with a smaller battery capacity.
【０００６】[0006]
【課題を解決するための手段】前述の目的を達成するた
めに、まず、複数の電池と交流−直流電力変換装置の組
を１つのユニットとし、このユニットを複数個用意して
並列に接続することにより各ユニットを個別に制御，運
用可能とした。また、各ユニットは、あらかじめ、放電
用と充電用に選択，分類し、放電用に選択されたユニッ
ト内の電池は放電に適した充電量にし、充電用に選択さ
れたユニット内の電池は放電用に選択されたユニット内
の電池の充電量とは異なる充電量としておくことで、送
電線故障による有効電力の動揺等、急激な交流系統の状
態の変動に対応させる。In order to achieve the above-mentioned object, first, a set of a plurality of batteries and an AC-DC power converter is made into one unit, and a plurality of these units are prepared and connected in parallel. As a result, each unit can be controlled and operated individually. In addition, each unit is selected and classified in advance for discharging and charging, the battery in the unit selected for discharging is set to a charge amount suitable for discharging, and the battery in the unit selected for charging is discharged. By setting the charge amount different from the charge amount of the battery in the unit selected for use, it is possible to cope with a sudden change in the state of the AC system such as a fluctuation of active power due to a failure in the transmission line.
【０００７】[0007]
【作用】各ユニットは、あらかじめ、放電用と充電用に
選択，分類して、放電用に選択されたユニット内の電池
は放電に適した充電量に、充電用に選択されたユニット
内の電池は放電用に選択されたユニット内の電池の充電
量とは異なる充電量にする。なお、一般に二次電池にお
いては、電池容量に対して７０〜９８％の充電量が放電
速度が最も速く、この範囲の充電量が放電に適した充電
量であることが知られている。放電用のユニットは交流
系統に電力を放出する時にだけ使用し、充電用のユニッ
トは交流系統から電力を吸収する時にだけ使用する。Operation: Each unit is selected and classified in advance for discharging and charging, and the battery in the unit selected for discharging has a charge amount suitable for discharging, and the battery in the unit selected for charging. Has a different charge to that of the batteries in the unit selected for discharge. It is known that, in general, a secondary battery has a highest discharge rate at a charge amount of 70 to 98% of the battery capacity, and a charge amount in this range is a charge amount suitable for discharging. The discharging unit is used only when discharging power to the AC system, and the charging unit is used only when absorbing power from the AC system.
【０００８】交流系統に電力を放出する時は、放電用に
選択されたユニット内の電池は放電に適した充電量とな
っているので、電池の種類に応じた最大限の放電速度で
放電することが可能である。交流系統から電力を吸収す
る時は、充電用に選択されたユニットは充電専用となっ
ており、可能な限り急速に充電することができる。When discharging power to the AC system, the battery in the unit selected for discharging has a charge amount suitable for discharging, and therefore discharges at the maximum discharge rate according to the type of battery. It is possible. When absorbing power from the AC grid, the unit selected for charging is dedicated to charging and can be charged as quickly as possible.
【０００９】また、放電用ユニットについては放電に必
要な容量の電池を、充電用ユニットについても充電に必
要な容量の電池を用意しておけばよいので、装置内の電
池を一括して放電若しくは充電させる方式と較べて、装
置全体で電池の容量を少なくすることができる。Further, it is sufficient to prepare a battery having a capacity necessary for discharging for the discharging unit and a battery having a capacity necessary for charging for the charging unit. Compared with the charging method, the battery capacity of the entire device can be reduced.
【００１０】[0010]
【実施例】以下本発明の一実施例を図１に示す。図１は
装置の全体図である。各ユニットは１台の電力変換装置
１３と複数の電池を直列接続した１組の電池連１４によ
り構成されている。このユニットは複数個並列に接続さ
れており、交流系統１１には変圧器１２を介して接続さ
れている。各ユニットの電力変換装置１３には、電力変
換装置１３を制御するための制御装置１５が取付けら
れ、さらに各制御装置１５には統括制御装置１８が接続
されている。また、統括制御装置１８には、各ユニット
に取付けられた充電量検出装置１６と、交流系統１１に
取付けられた有効電力を検出する検出装置１７が接続さ
れている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention is shown in FIG. FIG. 1 is an overall view of the device. Each unit is composed of one power converter 13 and a set of battery series 14 in which a plurality of batteries are connected in series. A plurality of these units are connected in parallel, and are connected to the AC system 11 via a transformer 12. A control device 15 for controlling the power conversion device 13 is attached to the power conversion device 13 of each unit, and a general control device 18 is connected to each control device 15. Further, a charge amount detection device 16 attached to each unit and a detection device 17 attached to the AC system 11 for detecting active power are connected to the overall control device 18.
【００１１】図１の実施例に示した装置では、各ユニッ
トは、あらかじめ、放電用と充電用に選択されている。
このとき、放電用ユニットの数と、充電用ユニットの数
は、交流系統１１の状態、交流系統１１における図１の
装置の設置点等により決定される。例えば、地絡事故に
よる発電機の脱調を防止する目的で、発電機に近い地点
に本装置を設置する場合は、充電用ユニットの数を、地
絡事故直後に有効電力を吸収して発電機の加速を防ぐた
めに必要な容量に見合った数とする。In the apparatus shown in the embodiment of FIG. 1, each unit is selected in advance for discharging and charging.
At this time, the number of discharging units and the number of charging units are determined by the state of the AC system 11, the installation point of the device of FIG. For example, when installing this device at a location near the generator for the purpose of preventing out-of-step of the generator due to a ground fault, set the number of charging units to The number should be commensurate with the capacity required to prevent acceleration of the machine.
【００１２】各放電用ユニット内の電池連１４は、交流
系統１１が定常状態の時に、統括制御装置１８が各電力
変換装置の制御装置１５に指令を送って電力変換装置１
３を動作させ、各充電量検出装置１６により検出される
各ユニット内の電池連１４の充電量を照合しながら、放
電に適した充電量にする。同様に、各充電用ユニット内
の電池連１４も、交流系統１１が定常状態の時に、統括
制御装置１８が各電力変換装置の制御装置１５に指令を
送って電力変換装置１３を動作させ、各充電量検出装置
１６により検出される各ユニット内の電池連１４の充電
量を照合しながら、充電用ユニットに対する充電量にす
る。In the battery unit 14 in each discharging unit, the integrated control unit 18 sends a command to the control unit 15 of each power converter when the AC system 11 is in a steady state, and the power converter 1
3 is operated to make the charge amount suitable for discharging while checking the charge amount of the battery cell 14 in each unit detected by each charge amount detection device 16. Similarly, in the battery station 14 in each charging unit, the integrated control device 18 sends a command to the control device 15 of each power conversion device to operate the power conversion device 13 when the AC system 11 is in a steady state. The charge amount of the battery unit 14 in each unit detected by the charge amount detecting device 16 is collated with the charge amount for the charging unit.
【００１３】図２は各ユニット内の電池連の充電量を示
したグラフの例である。なお、この例では、放電用ユニ
ット内の電池連の充電量は９５％とし、充電用ユニット
内の電池連１４の充電量は１０％としてある。図２にお
いては、１〜ｎまでの各ユニットの中で、３個のユニッ
トを放電用ユニットとし、他のユニットについては、充
電用ユニットとしてある。FIG. 2 is an example of a graph showing the charge amount of the battery cell in each unit. In this example, the charging amount of the battery unit in the discharging unit is 95%, and the charging amount of the battery unit 14 in the charging unit is 10%. In FIG. 2, among the units 1 to n, three units are discharging units, and the other units are charging units.
【００１４】図３にこの装置の動作の例を示す。図３で
は、時刻ｔ０で地絡事故が発生し、時刻ｔ１で事故が除
去されている。事故が除去された後、交流系統１１の有
効電力は動揺する。FIG. 3 shows an example of the operation of this device. In FIG. 3, a ground fault occurs at time t0, and the accident is removed at time t1. After the accident is removed, the active power of the AC system 11 fluctuates.
【００１５】時刻ｔ１〜ｔ２および時刻ｔ３〜ｔ４では
交流系統１１内の発電機が加速して有効電力が増加し、
時刻ｔ２〜ｔ３および時刻ｔ４以降では交流系統１１内
の発電機が減速して有効電力が減少する。At times t1 to t2 and times t3 to t4, the generator in the AC system 11 accelerates to increase active power,
After time t2 to t3 and time t4, the generator in the AC system 11 decelerates and active power decreases.
【００１６】交流系統１１の有効電力は検出装置１７に
より検出され、検出された信号は統括制御装置１８に送
られる。時刻ｔ１〜ｔ２および時刻ｔ３〜ｔ４のよう
に、有効電力が増加している時には、統括制御装置１８
は、充電用ユニットの制御装置１５に指令を送り電力変
換装置１３を動作させて交流電力を直流電力に変換し、
交流系統１１の有効電力を吸収する。時刻ｔ２〜ｔ３お
よび時刻ｔ４以降のように、有効電力が減少している時
には、統括制御装置１８は、放電用ユニットの制御装置
１５に指令を送り電力変換装置１３を動作させて直流電
力を交流電力に変換し、交流系統１１に有効電力を供給
する。このようにして、交流系統１１の有効電力が動揺
した時に、動揺に応じて、有効電力の吸収および放出を
繰り返し、動揺を減衰させる。The active power of the AC system 11 is detected by the detection device 17, and the detected signal is sent to the integrated control device 18. When the active power is increasing as at times t1 to t2 and times t3 to t4, the integrated control device 18
Sends a command to the controller 15 of the charging unit to operate the power converter 13 to convert AC power into DC power,
The active power of the AC system 11 is absorbed. When the active power is decreasing as at times t2 to t3 and time t4 and thereafter, the integrated control device 18 sends a command to the control device 15 of the discharging unit to operate the power conversion device 13 to convert the DC power to the AC power. It is converted into electric power and active power is supplied to the AC system 11. In this way, when the active power of the AC system 11 fluctuates, the fluctuation is attenuated by repeating absorption and release of the active power according to the fluctuation.
【００１７】なお、図３で示した例は、放電用ユニット
と充電用ユニットのOn−Off を制御した場合であるが、
On−Off 制御でなく、交流系統１１の有効電力の動揺の
大きさに応じて放電量および充電量を制御する方式もあ
る。The example shown in FIG. 3 is a case where the on-off of the discharging unit and the charging unit is controlled.
There is also a method of controlling the discharge amount and the charge amount according to the magnitude of the fluctuation of the active power of the AC system 11, instead of the on-off control.
【００１８】また、前記各制御装置、および前記各検出
装置の構成および接続については必ずしも上記の通りと
は限らない。例えば、発電機の近くに設置された場合
は、検出装置１７は、有効電力を検出するための交流系
統１１に取付けられた検出装置ではなく、発電機タービ
ンの回転速度を検出するための発電機に取付けられた検
出装置でもよく、その場合は、発電機の動揺が直接検出
できるので、より効果的に動揺が抑制できる。Further, the configurations and connections of the control devices and the detection devices are not always as described above. For example, when the detector 17 is installed near the generator, the detector 17 is not a detector attached to the AC system 11 for detecting active power, but a generator for detecting the rotation speed of the generator turbine. It is also possible to use a detection device attached to, and in that case, since the fluctuation of the generator can be directly detected, the fluctuation can be suppressed more effectively.
【００１９】[0019]
【発明の効果】以上のように、本発明によれば、送電線
故障による有効電力の動揺等、急激な交流系統の状態の
変動に二次電池の放電および充電を高速に追随させるこ
とが可能となる効果があり、また、電力変換装置と電池
連１４により構成されているユニットを、放電用と充電
用に分類することで、装置全体の電池の容量を少なくす
る効果がある。As described above, according to the present invention, discharging and charging of the secondary battery can be quickly followed by a sudden change in the state of the AC system such as a fluctuation of active power due to a failure of the transmission line. By classifying the unit configured by the power conversion device and the battery unit 14 into one for discharging and one for charging, there is an effect of reducing the battery capacity of the entire device.
【図１】本発明の一実施例を示す、装置の全体図であ
る。FIG. 1 is an overall view of an apparatus showing an embodiment of the present invention.
【図２】各ユニット内の電池連の充電状態の例を示すグ
ラフである。FIG. 2 is a graph showing an example of a charging state of a battery string in each unit.
【図３】本発明の実施例に示した装置の動作の例を示す
図である。FIG. 3 is a diagram showing an example of operation of the apparatus shown in the embodiment of the present invention.
１１…交流系統、１２…変圧器、１３…電力変換装置、
１４…電池連、１５…電力変換装置の制御装置、１６…
充電量検出装置、１７…有効電力検出装置、１８…統括
制御装置。11 ... AC system, 12 ... Transformer, 13 ... Power converter,
14 ... Battery station, 15 ... Power converter control device, 16 ...
Charge amount detection device, 17 ... Active power detection device, 18 ... Integrated control device.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 叶井 実 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 (72)発明者 小西 博雄 茨城県日立市大みか町七丁目１番１号 株 式会社日立製作所日立研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Kanai 7-1, 1-1 Omika-cho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Hiroo Konishi 7-chome, Omika-cho, Hitachi-shi, Ibaraki No. 1 Hitachi Co., Ltd. Hitachi Research Laboratory
Claims (3)
ユニットと、前記電力変換器を制御する制御装置とを備
え、交流系統の状態に応じて電力を吸収若しくは放出を
する電力系統安定化装置において、 各ユニットを放電用ユニット又は充電用ユニットのいず
れかにあらかじめ選択しておくことを特徴とする電力系
統安定化装置。1. A power system that includes a plurality of units including a secondary battery and a power converter, and a controller that controls the power converter, and that absorbs or releases power according to the state of the AC system. In the stabilization device, the power system stabilization device is characterized in that each unit is selected in advance as either a discharge unit or a charging unit.
化装置であって、 前記放電用ユニットは放電に適した充電量とし、前記充
電用ユニットは、前記放電用ユニットの充電量とは異な
る充電量とすることを特徴とする電力系統安定化装置。2. The power system stabilizing device according to claim 1, wherein the discharging unit has a charging amount suitable for discharging, and the charging unit has a charging amount of the discharging unit. Is a power system stabilizing device characterized by different charging amounts.
化装置であって、 交流系統から電力を吸収する時は充電用ユニットを使用
し、交流系統に電力を放出する時は放電用ユニットを使
用することを特徴とする電力系統安定化装置。3. The power system stabilizing device according to claim 1, wherein a charging unit is used when absorbing power from the AC system, and a discharging unit is used when discharging power to the AC system. A power system stabilizing device characterized by using a unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6198181A JPH0865895A (en) | 1994-08-23 | 1994-08-23 | Stabilizer in power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6198181A JPH0865895A (en) | 1994-08-23 | 1994-08-23 | Stabilizer in power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0865895A true JPH0865895A (en) | 1996-03-08 |
Family
ID=16386832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6198181A Pending JPH0865895A (en) | 1994-08-23 | 1994-08-23 | Stabilizer in power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0865895A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003023933A1 (en) * | 2001-09-13 | 2003-03-20 | Made Tecnologías Renovables, S.A. | System for conditioning and generating/storing power in electrical distribution networks in order to improve the dynamic stability and frequency control thereof |
| JP2007236084A (en) * | 2006-02-28 | 2007-09-13 | Ntt Facilities Inc | Power system stabilizer |
| WO2010135937A1 (en) * | 2009-05-27 | 2010-12-02 | Byd Company Limited | Energy storage system for balancing load of power grid |
| JP2012010452A (en) * | 2010-06-23 | 2012-01-12 | Tokyo Electric Power Co Inc:The | Operation apparatus for batteries in power system |
| JP2012010453A (en) * | 2010-06-23 | 2012-01-12 | Tokyo Electric Power Co Inc:The | Storage battery system |
| JP2012085493A (en) * | 2010-10-14 | 2012-04-26 | Toshiba Corp | Power stabilization system and power stabilization method |
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1994
- 1994-08-23 JP JP6198181A patent/JPH0865895A/en active Pending
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| ES2190735A1 (en) * | 2001-09-13 | 2003-08-01 | Made Tecnologias Renovables S | System for conditioning and generating/storing power in electrical distribution networks in order to improve the dynamic stability and frequency control thereof |
| WO2003023933A1 (en) * | 2001-09-13 | 2003-03-20 | Made Tecnologías Renovables, S.A. | System for conditioning and generating/storing power in electrical distribution networks in order to improve the dynamic stability and frequency control thereof |
| JP2007236084A (en) * | 2006-02-28 | 2007-09-13 | Ntt Facilities Inc | Power system stabilizer |
| JP4494352B2 (en) * | 2006-02-28 | 2010-06-30 | 株式会社Ｎｔｔファシリティーズ | Power system stabilizer |
| WO2010135937A1 (en) * | 2009-05-27 | 2010-12-02 | Byd Company Limited | Energy storage system for balancing load of power grid |
| JP2012010452A (en) * | 2010-06-23 | 2012-01-12 | Tokyo Electric Power Co Inc:The | Operation apparatus for batteries in power system |
| JP2012010453A (en) * | 2010-06-23 | 2012-01-12 | Tokyo Electric Power Co Inc:The | Storage battery system |
| US9013152B2 (en) | 2010-10-14 | 2015-04-21 | Kabushiki Kaisha Toshiba | Power stabilization system and power stabilizing method |
| JP2012085493A (en) * | 2010-10-14 | 2012-04-26 | Toshiba Corp | Power stabilization system and power stabilization method |
| JP2012191737A (en) * | 2011-03-10 | 2012-10-04 | Toshiba Corp | Power storage system |
| US9124103B2 (en) | 2011-06-22 | 2015-09-01 | Kabushiki Kaisha Toshiba | Electrical storage apparatus |
| JPWO2013008859A1 (en) * | 2011-07-12 | 2015-02-23 | 三洋電機株式会社 | Storage battery assembly control system |
| US9150114B2 (en) | 2011-07-29 | 2015-10-06 | Kabushiki Kaisha Toshiba | Storage system |
| US9184618B2 (en) | 2011-07-29 | 2015-11-10 | Kabushiki Kaisha Toshiba | Electric vehicle battery storage system |
| JP2013102563A (en) * | 2011-11-07 | 2013-05-23 | Sanyo Electric Co Ltd | Power storage device and power supply system |
| JP2016526869A (en) * | 2013-06-24 | 2016-09-05 | ユーニコス アクチェンゲゼルシャフトＹｏｕｎｉｃｏｓ ＡＧ | Method and apparatus for storing electrical energy in an electrochemical energy storage device |
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