JPH06121470A - Power storage system - Google Patents
Power storage systemInfo
- Publication number
- JPH06121470A JPH06121470A JP4269962A JP26996292A JPH06121470A JP H06121470 A JPH06121470 A JP H06121470A JP 4269962 A JP4269962 A JP 4269962A JP 26996292 A JP26996292 A JP 26996292A JP H06121470 A JPH06121470 A JP H06121470A
- Authority
- JP
- Japan
- Prior art keywords
- set value
- power
- secondary battery
- load
- inverter
- 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.)
- Pending
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一般家庭向け程度の小
容量の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 small-capacity power storage system for household use.
【０００２】[0002]
【従来の技術】従来、昼夜間の電力需要を平準化するた
め、一般家庭に電力貯蔵システムを設置して夜間に貯蔵
した電力を昼間のピーク部分のみ電力貯蔵システムより
給電して平準化を行なうものとして、公開特許公報特開
平3−226233 号等が知られている。2. Description of the Related Art Conventionally, in order to level the power demand during the day and night, a power storage system is installed in a general household and the power stored at night is supplied from the power storage system only in the peak portion of the daytime for leveling. Japanese Patent Laid-Open Publication No. 3-226233 and the like are known.
【０００３】[0003]
【発明が解決しようとする課題】上記電力貯蔵システム
では、負荷の電力需要が所定値を超過した場合のみ２次
電池より供給するため、夜間貯蔵した電力が昼間に完全
に放電されないことがある。このため、次に充電を行な
う場合に過充電となり、２次電池の特性あるいは寿命の
劣化を引き起こす問題があった。In the above electric power storage system, since the secondary battery supplies the electric power only when the electric power demand of the load exceeds a predetermined value, the electric power stored at night may not be completely discharged in the daytime. For this reason, there is a problem that the next time charging is performed, overcharging occurs and the characteristics or life of the secondary battery deteriorates.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するた
め、２次電池、電力系統より２次電池を充電する手段、
２次電池の電力を交流に変換する手段を有し、該変換手
段の出力電流が設定値以内の場合には、すべて２次電池
より供給し、負荷電流が設定値を越えた場合には該超過
分を電力系統より供給するよう該変換手段を制御する手
段を設ける。In order to solve the above problems, a secondary battery, a means for charging the secondary battery from a power system,
When the output current of the conversion means is within a set value, all are supplied from the secondary battery, and when the output current of the conversion means is within the set value, the load current exceeds the set value. Means are provided for controlling the conversion means so as to supply the excess from the power system.
【０００５】[0005]
【作用】上記制御手段により２次電池は昼間に完全に放
電されるため、過充電による特性や寿命の劣化を招くこ
とはない。また夜間の安価な電力を有効に利用できるた
め、需要家の電力コストを低減できる。Since the secondary battery is completely discharged in the daytime by the above-mentioned control means, deterioration of characteristics and life due to overcharge is not caused. Moreover, since the cheap electric power at night can be effectively used, the electric power cost of the consumer can be reduced.
【０００６】[0006]
【実施例】本発明による一実施例を図１に示す。同図に
おいて１は電力系統、２は２次電池、３は充電手段とな
る整流器、４は変換手段となるインバータ、５，６はそ
れぞれ整流器３、インバータ４の制御回路、７は全系制
御回路、８は負荷である。本実施例は以下のように働
く。FIG. 1 shows an embodiment according to the present invention. In the figure, 1 is a power system, 2 is a secondary battery, 3 is a rectifier that serves as charging means, 4 is an inverter that serves as conversion means, 5 and 6 are control circuits for the rectifier 3 and the inverter 4, respectively, and 7 is a control circuit for the entire system. , 8 are loads. This example works as follows.
【０００７】全系制御回路７は図示しない計時手段を備
え、これにより夜間の場合には整流器３の制御回路５に
運転指令を、昼間の場合にはインバータ４の制御回路６
に運転指令を与える。整流器３の制御回路５は全系制御
回路７から運転指令を受け、出力電圧が設定電圧と一致
するよう整流器３を制御する。インバータ４の制御回路
６は、全系制御回路７から運転指令を受け、出力電流が
設定値を越えない範囲では負荷端の電圧波形が系統の電
圧波形と一致するようにインバータ４を制御し、出力電
流が設定値を越えた場合には負荷端の電圧波形が系統の
電圧波形より位相が遅れるようインバータ４を制御す
る。これにより、インバータ４の出力電流が設定値を越
えない範囲では負荷への電力はすべて２次電池から供給
され、出力電流が設定値を越えた場合には超過分を電力
系統１から供給できる。図２は負荷８の電力需要のパタ
ーンの一例を示したものである。本例では、夜２２時か
ら朝６時の間は整流器３を運転して２次電池２を充電
し、６時から２２時の間はインバータ４を運転して２次
電池２から負荷８に電力を供給する。この時、負荷８の
消費電力が設定値を越えた場合には、先に述べた制御に
より図中は線部の電力のみ電力系統１から供給される。The whole system control circuit 7 is provided with a timing means (not shown), whereby an operation command is given to the control circuit 5 of the rectifier 3 at night and a control circuit 6 of the inverter 4 at daytime.
Give a driving command to. The control circuit 5 of the rectifier 3 receives the operation command from the whole system control circuit 7 and controls the rectifier 3 so that the output voltage matches the set voltage. The control circuit 6 of the inverter 4 receives the operation command from the whole system control circuit 7, and controls the inverter 4 so that the voltage waveform at the load end matches the voltage waveform of the system within a range where the output current does not exceed the set value. When the output current exceeds the set value, the inverter 4 is controlled so that the voltage waveform at the load end is delayed in phase from the voltage waveform of the system. As a result, all the electric power to the load is supplied from the secondary battery within a range in which the output current of the inverter 4 does not exceed the set value, and when the output current exceeds the set value, the excess can be supplied from the power system 1. FIG. 2 shows an example of a power demand pattern of the load 8. In this example, the rectifier 3 is operated to charge the secondary battery 2 from 22:00 to 6:00 in the morning, and the inverter 4 is operated to supply electric power from the secondary battery 2 to the load 8 from 6 to 22:00. . At this time, if the power consumption of the load 8 exceeds the set value, only the power of the line portion in the figure is supplied from the power system 1 by the control described above.
【０００８】このように本実施例によれば、電力需要の
少ない夜間に電力系統から２次電池を充電し、前記変換
手段は昼間に２次電池に貯蔵した電力を交流電力に変換
して負荷に給電するので、夜間に電力需要が増加し、昼
間の電力需要を低減でき、負荷平準化を実現できる。さ
らに本発明によれば負荷の電力需要パターンにかかわら
ず必ず２次電池が放電されるので、過充電による特性や
寿命の劣化を防ぐことができる。また本実施例では、深
夜の安い電力を活用できるので、需要家の電力コストを
低減する効果もある。As described above, according to this embodiment, the secondary battery is charged from the power system at night when the power demand is low, and the converting means converts the electric power stored in the secondary battery into the AC power during the daytime. Since the power is supplied to the power source, the power demand increases at night, the power demand in the daytime can be reduced, and the load leveling can be realized. Further, according to the present invention, since the secondary battery is always discharged regardless of the power demand pattern of the load, deterioration of characteristics and life due to overcharge can be prevented. Further, in the present embodiment, since it is possible to utilize the cheap power at midnight, there is also an effect of reducing the power cost of the customer.
【０００９】本発明による他の実施例を図３に示す。本
実施例は図１の実施例において全系制御回路７に２次電
池２の電圧値をフィードバックし、この電圧値がが設定
電圧を下回った場合には昼間であってもインバータ４の
制御回路６に停止指令を与えるようにしたものである。
本実施例によれば、２次電池２の残存容量が少なくなっ
た場合には、インバータ４が停止して電力系統１より給
電するので、２次電池２の過放電を防ぐと同時に、常に
安定に負荷に給電することができる。Another embodiment according to the present invention is shown in FIG. In this embodiment, the voltage value of the secondary battery 2 is fed back to the whole system control circuit 7 in the embodiment of FIG. 1, and when this voltage value is lower than the set voltage, the control circuit of the inverter 4 even during the daytime. The stop command is given to the No. 6.
According to the present embodiment, when the remaining capacity of the secondary battery 2 becomes low, the inverter 4 stops and power is supplied from the power system 1. Therefore, over-discharge of the secondary battery 2 is prevented and at the same time stable. Can supply power to the load.
【００１０】本発明による他の実施例を図４に示す。本
実施例は図３の実施例において、整流器３による充電機
能をインバータ４に持たせたものである。本実施例によ
れば、整流器３を省くことができるので、電力貯蔵シス
テムの小形，低コスト化が実現できる。Another embodiment according to the present invention is shown in FIG. In this embodiment, the inverter 4 has the charging function of the rectifier 3 in the embodiment of FIG. According to this embodiment, since the rectifier 3 can be omitted, the power storage system can be downsized and the cost can be reduced.
【００１１】[0011]
【発明の効果】本発明によれば、負荷の電力需要パター
ンにかかわらず必ず２次電池が放電されるので、過充電
による特性や寿命の劣化を防ぐことができ、電力貯蔵シ
ステムの高信頼化が図れる。According to the present invention, since the secondary battery is always discharged regardless of the power demand pattern of the load, deterioration of characteristics and life due to overcharge can be prevented, and high reliability of the power storage system can be achieved. Can be achieved.
【図１】本発明の一実施例の構成図。FIG. 1 is a configuration diagram of an embodiment of the present invention.
【図２】本発明の動作説明図。FIG. 2 is an operation explanatory diagram of the present invention.
【図３】本発明の他の実施例の構成図。FIG. 3 is a configuration diagram of another embodiment of the present invention.
【図４】本発明の他の実施例の構成図。FIG. 4 is a configuration diagram of another embodiment of the present invention.
１…電源系統、２…２次電池、３…整流器、４…インバ
ータ、７…全系制御回路、８…負荷。1 ... Power supply system, 2 ... Secondary battery, 3 ... Rectifier, 4 ... Inverter, 7 ... Whole system control circuit, 8 ... Load.
Claims (4)
力系統から前記２次電池を充電する手段と前記２次電池
出力を交流電圧に変換する手段を有し、前記電力系統に
連系して負荷に給電する電力貯蔵システムにおいて、 前記変換手段に負荷電流の分担比を制御する手段を有す
ることを特徴とする電力貯蔵システム。1. An electric power system and a secondary battery are used as electric power sources, and means for charging the secondary battery from the electric power system and means for converting the output of the secondary battery into an AC voltage are provided and are connected to the electric power system. In a power storage system for supplying power to a load in a system, the conversion means includes means for controlling a load current share ratio.
て、 負荷電流が設定値以内の場合には、すべて２次電池より
供給し、負荷電流が設定値を越えた場合には該超過分を
電力系統より供給することを特徴とする電力貯蔵システ
ム。2. The power storage system according to claim 1, wherein when the load current is within a set value, all is supplied from the secondary battery, and when the load current exceeds the set value, the excess amount is exceeded. A power storage system characterized by being supplied from a power grid.
て、 前記設定値が前記変換手段の定格出力電流であることを
特徴とする電力貯蔵システム。3. The power storage system according to claim 2, wherein the set value is a rated output current of the conversion means.
て、 前記２次電池の残存容量を検知する手段を有し、該残存
量に応じて前記設定値を変えることを特徴とする電力貯
蔵システム。4. The power storage system according to claim 1, further comprising means for detecting a remaining capacity of the secondary battery, and changing the set value according to the remaining capacity. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4269962A JPH06121470A (en) | 1992-10-08 | 1992-10-08 | Power storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4269962A JPH06121470A (en) | 1992-10-08 | 1992-10-08 | Power storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06121470A true JPH06121470A (en) | 1994-04-28 |
Family
ID=17479651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4269962A Pending JPH06121470A (en) | 1992-10-08 | 1992-10-08 | Power storage system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06121470A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10336900A (en) * | 1997-05-29 | 1998-12-18 | Kyushu Electric Power Co Inc | Feed system also used as auxiliary power supply device |
| WO2002061917A1 (en) * | 2001-02-01 | 2002-08-08 | Hitachi Maxell, Ltd. | Power supply |
| JP2006101634A (en) * | 2004-09-29 | 2006-04-13 | Tokyo Electric Power Co Inc:The | Distributed power supply device |
| US7388364B2 (en) | 2004-02-19 | 2008-06-17 | Siemens Ag Osterreich | Device for covering the peak load |
-
1992
- 1992-10-08 JP JP4269962A patent/JPH06121470A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10336900A (en) * | 1997-05-29 | 1998-12-18 | Kyushu Electric Power Co Inc | Feed system also used as auxiliary power supply device |
| WO2002061917A1 (en) * | 2001-02-01 | 2002-08-08 | Hitachi Maxell, Ltd. | Power supply |
| US7388364B2 (en) | 2004-02-19 | 2008-06-17 | Siemens Ag Osterreich | Device for covering the peak load |
| JP2006101634A (en) * | 2004-09-29 | 2006-04-13 | Tokyo Electric Power Co Inc:The | Distributed power supply device |
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