JP2000350384A - Uninterruptible power supply device - Google Patents
Uninterruptible power supply deviceInfo
- Publication number
- JP2000350384A JP2000350384A JP11158874A JP15887499A JP2000350384A JP 2000350384 A JP2000350384 A JP 2000350384A JP 11158874 A JP11158874 A JP 11158874A JP 15887499 A JP15887499 A JP 15887499A JP 2000350384 A JP2000350384 A JP 2000350384A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- life
- storage battery
- rechargeable 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.)
- Pending
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
- 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
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、蓄電池等のエネル
ギー蓄積部の寿命を判断する機能を備えた無停電電源装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply having a function of determining the life of an energy storage unit such as a storage battery.
【０００２】[0002]
【従来の技術】従来から、瞬間的な停電も許されない例
えばコンピュータ等の重要負荷の電源として、無停電電
源装置（以下「ＵＰＳ」という）１が多く使用されてい
る。図７は、この種の一般的なＵＰＳ１の１台の基本的
な構成例を示している。2. Description of the Related Art Conventionally, an uninterruptible power supply (hereinafter referred to as "UPS") 1 is often used as a power supply for an important load such as a computer in which a momentary power failure is not allowed. FIG. 7 shows a basic configuration example of one general UPS 1 of this kind.
【０００３】図７において、商用電源２から入力される
交流入力３は、交流入力遮断器４を介して順変換器５で
直流に変換され、さらに逆変換器６で再び交流に逆変換
されて無瞬断切換回路７を介して得られる交流出力１４
は負荷１５に供給される。In FIG. 7, an AC input 3 input from a commercial power supply 2 is converted to DC by a forward converter 5 via an AC input circuit breaker 4, and is again converted back to AC by an inverse converter 6. AC output 14 obtained via instantaneous interruption switching circuit 7
Is supplied to the load 15.
【０００４】その一方で、順変換器５は、直流入力遮断
器１０を介してエネルギー蓄積部である蓄電池１１に直
流エネルギーを蓄えるための役割に供される。商用電源
２に停電が生ずる（交流入力３が停電する）と、蓄電池
１１の直流エネルギーが逆変換器６に供給され、ＵＰＳ
１の交流出力１４は負荷１５に連続して供給することが
できる。On the other hand, the forward converter 5 is used to store DC energy in a storage battery 11 as an energy storage via a DC input circuit breaker 10. When a power failure occurs in the commercial power supply 2 (AC input 3 fails), the DC energy of the storage battery 11 is supplied to the inverter 6 and the UPS
One AC output 14 can be continuously supplied to a load 15.
【０００５】また、ＵＰＳ１は、保守点検や上記各回路
に万一故障が発生した場合に、商用電源２により交流出
力１４を継続するバイパス入力遮断器１２とバイパス回
路１３を備えている。バイパス回路１３との切換は、無
瞬断切換回路７にて行われる。The UPS 1 is provided with a bypass input circuit breaker 12 and a bypass circuit 13 for maintaining the AC output 14 by the commercial power supply 2 in the event of maintenance or inspection or a failure of any of the above circuits. Switching to the bypass circuit 13 is performed by the instantaneous interruption switching circuit 7.
【０００６】尚、一般的にＵＰＳ１に用いる蓄電池１１
は、期待寿命が５年〜７年程度のものが最も多く使われ
る。しかしながら、蓄電池の寿命は設置場所の温度によ
り左右される（温度が高ければ寿命は短くなる）ため、
一般的にはメーカが年１回程度蓄電池の各セル（１個あ
たり）の電圧を測定し、その値が規定値を外れている蓄
電池セルが全体の個数の１割以上あった場合にその蓄電
池が寿命期に至ったと判断している。The storage battery 11 generally used for the UPS 1
Of those, those having an expected life of about 5 to 7 years are most often used. However, the life of a storage battery depends on the temperature of the installation location (the higher the temperature, the shorter the life).
In general, the manufacturer measures the voltage of each cell (per cell) of the storage battery about once a year, and when the value of the storage battery cell is out of the specified value, the storage battery is determined to be 10% or more of the total number. Judge that it has reached the end of its life.
【０００７】[0007]
【発明が解決しようとする課題】ＵＰＳは、商用電源が
停電しても負荷に対して電源が停電することなく連続し
た電源を供給することが最も大きな使命である。そのた
めに、ＵＰＳは、上述したように、直流エネルギー源で
ある蓄電池を重要な構成要素としている。The biggest mission of the UPS is to supply a continuous power supply to the load without a power failure even when a commercial power supply fails. Therefore, as described above, the UPS uses a storage battery as a DC energy source as an important component.
【０００８】このため、もし蓄電池が寿命により直流エ
ネルギー源としての機能を果たせない場合には無停電電
源装置としての機能を果たせないこととなる。よって、
ＵＰＳにとって蓄電池が寿命期に至る前に寿命が近い事
を事前予知として知ることができればユーザ側の更新計
画に非常に役立ち、さらに信頼性の高いＵＰＳを維持で
きる。[0008] For this reason, if the storage battery cannot function as a DC energy source due to its life, it cannot function as an uninterruptible power supply. Therefore,
For the UPS, if it is possible to know in advance that the storage battery is nearing its end of life before reaching the end of its life, it will be very useful for a user's update plan, and a more reliable UPS can be maintained.
【０００９】蓄電池の寿命は、蓄電池の種類、形式によ
ってそれぞれメーカから期待寿命が提示されているが、
蓄電池の設置させている周囲温度によって寿命が左右
（温度が高いと寿命が短くなる）されることから、メー
カの提示している期待寿命だけで蓄電池の更新計画を立
てるには少し問題がある。Regarding the life of the storage battery, the expected life is provided by the manufacturer depending on the type and type of the storage battery.
Since the life depends on the ambient temperature at which the storage battery is installed (the higher the temperature, the shorter the life), there is a slight problem in making a renewal plan of the storage battery based only on the expected life provided by the manufacturer.
【００１０】従来、蓄電池の寿命は年１回メーカが蓄電
池の各セル電圧を測定しその結果管理値を超える蓄電池
セルが全体の１割を超えた場合に、蓄電池が寿命に至っ
たことをユーザ側に報告して更新の計画をしてもらって
いた。Conventionally, the life of a storage battery is measured once a year by a maker, and as a result, if more than 10% of the total number of storage cells exceed a control value, the user is notified that the life of the storage battery has expired. I had reported to the side and had a plan of renewal.
【００１１】つまり、従来はメーカからの点検（蓄電池
セル電圧測定）報告があるまではユーザ側では使用して
いる蓄電池が寿命期に近いかどうかを判断することがで
きないという問題があった。そこで、本発明の目的は、
通常の運用の中で蓄電池が寿命期に近いかどうか判断で
きる無停電電源装置を提供することにある。That is, conventionally, there has been a problem that the user cannot judge whether the used storage battery is near the end of its life until the manufacturer reports the inspection (storage cell voltage measurement). Therefore, an object of the present invention is to
It is an object of the present invention to provide an uninterruptible power supply that can determine whether a storage battery is nearing its end of life during normal operation.
【００１２】[0012]
【課題を解決するための手段】上記目的を達成するため
に、請求項１に係る発明は、商用電源から入力される交
流を直流に変換して出力する順変換器と、この順変換器
からの直流出力を入力とし、直流を再び交流に変換して
出力する逆変換器と、上記商用電源の停電時に上記逆変
換器に直流電力を供給するエネルギー蓄積部と、保守点
検や故障の際に上記商用電源により負荷への給電を継続
させるバイパス回路と、このバイパス回路に無瞬断で切
り換える無瞬断切換回路と、上記商用電源の停電で前記
エネルギー蓄積部が放電した時の放電開始時の電圧を検
出し、この検出値と予め設定された値とを比較し、この
比較結果に応じて上記エネルギー蓄積部が寿命期である
かどうかを判断する判断回路とを備えたことを特徴とす
る。Means for Solving the Problems In order to achieve the above object, an invention according to claim 1 comprises a forward converter for converting an alternating current input from a commercial power supply into a direct current, and outputting the direct current. Inverter that receives the DC output as input, converts DC to AC again and outputs it, an energy storage unit that supplies DC power to the inverter when the commercial power supply fails, and A bypass circuit that continues to supply power to the load by the commercial power supply, a non-instantaneous interruption switching circuit that switches to the bypass circuit without an instantaneous interruption, and a discharge start when the energy storage unit is discharged due to a power outage of the commercial power supply. A determination circuit for detecting a voltage, comparing the detected value with a preset value, and determining whether or not the energy storage unit is at the end of its life according to the comparison result. .
【００１３】従って、エネルギー蓄積部が寿命期に近く
なると、放電開始時の電圧が新品に比べて低下すること
を利用し、商用電源が停電した場合に放電開始時（例え
ば停電後１秒間）のエネルギー蓄積部電圧と予め設定さ
れた値とを比較し、比較結果に基づき上記エネルギー蓄
積部が寿命期であるかどうかを判断する。尚、予め設定
された値は、１００％負荷時を条件に予め決められた値
とする。Therefore, utilizing the fact that the voltage at the start of discharge is lower than that of a new product when the energy storage unit is near the end of its life, it is possible to reduce the voltage at the start of discharge (for example, for one second after the power failure) when the commercial power supply is interrupted. The energy storage unit voltage is compared with a preset value, and it is determined based on the comparison result whether the energy storage unit has reached the end of its life. The value set in advance is a value determined in advance under the condition of 100% load.
【００１４】また、請求項２に係る発明は、上記判断回
路からの判断結果を外部に知らせる通報手段を備えたこ
とを特徴とする。従って、エネルギー蓄積部が寿命期に
近くなると、その旨ユーザ等は知ることができる。[0014] The invention according to claim 2 is characterized in that there is provided a notifying means for notifying the judgment result from the judgment circuit to the outside. Therefore, when the energy storage unit is near the end of its life, the user or the like can know to that effect.
【００１５】更に、請求項３に係る発明は、上記判断回
路に予め設定された値は、上記エネルギー蓄積部の放電
時の電流に基づき算出されたことを特徴とする。従っ
て、エネルギー蓄積部の放電開始時の電圧の設定値を予
め決められた値に固定するのではなく、エネルギー蓄積
部の放電開始時の電圧低下の度合いがＵＰＳの負荷量に
よって差が生じることから、エネルギー蓄積部の放電電
流に基づいた設定値を自動的に算出して決定することに
より、より正確にＵＰＳに使用している蓄電池が寿命期
に近いかどうか判別して警報することができる。Further, the invention according to claim 3 is characterized in that the value preset in the determination circuit is calculated based on a current at the time of discharging the energy storage unit. Therefore, instead of fixing the set value of the voltage at the start of discharge of the energy storage unit to a predetermined value, the degree of voltage drop at the start of discharge of the energy storage unit differs depending on the load of the UPS. By automatically calculating and determining the set value based on the discharge current of the energy storage unit, it is possible to more accurately determine whether or not the storage battery used in the UPS is near the end of its life and issue an alarm.
【００１６】[0016]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１７】（第１の実施の形態）以下、本発明の第１
の実施の形態について図１を参照して詳細に説明する。
図１に示すように、本実施の形態のＵＰＳ１において
は、商用電源２から入力される交流入力３は、交流入力
遮断器４を介して順変換器５で直流に変換され、さらに
逆変換器６で再び交流に逆変換されて無瞬断切換回路７
を介して得られる交流出力１４は負荷１５に供給され
る。(First Embodiment) Hereinafter, a first embodiment of the present invention will be described.
The embodiment will be described in detail with reference to FIG.
As shown in FIG. 1, in a UPS 1 of the present embodiment, an AC input 3 input from a commercial power supply 2 is converted to a DC by a forward converter 5 via an AC input circuit breaker 4, and further converted to an inverse converter. In step 6, the signal is again converted back to alternating current, and there is no instantaneous interruption switching circuit 7.
Is supplied to a load 15.
【００１８】その一方で、順変換器５は、直流入力遮断
器１０を介してエネルギー蓄積部である蓄電池１１に直
流エネルギーを蓄えるための役割に供される。更に、Ｕ
ＰＳ１は、直流電圧計測回路１６と直流電流計測回路１
７を有している。そして、更に、直流電圧計測回路１６
は、蓄電池１１の放電電圧と予め設定された直流不足電
圧値と比較し比較結果に応じてＵＰＳ１をトリップ停止
する直流不足電圧比較器１６Ａと、蓄電池１１の放電電
圧と予め設定された直流不足電圧予告値と比較し蓄電池
１１の電圧不足を警告する不足電圧警告器１６Ｂと、蓄
電池１１の放電開始電圧と予め設定された蓄電池異常値
とを比較し蓄電池１１が寿命期に近いか否かを判断する
寿命判断器１６Ｃとを有している。On the other hand, the forward converter 5 is used to store DC energy in the storage battery 11 as an energy storage unit via the DC input circuit breaker 10. Furthermore, U
PS1 is a DC voltage measurement circuit 16 and a DC current measurement circuit 1
7. Further, the DC voltage measurement circuit 16
Is a DC undervoltage comparator 16A that compares the discharge voltage of the storage battery 11 with a preset DC undervoltage value and stops tripping the UPS 1 according to the comparison result, and a discharge voltage of the storage battery 11 and the preset DC undervoltage. An undervoltage warning device 16B that warns of a shortage of the voltage of the storage battery 11 by comparing with a notice value, and compares the discharge start voltage of the storage battery 11 with a preset abnormal battery value to determine whether the storage battery 11 is near the end of its life. And a life determining unit 16C that performs the operation.
【００１９】ここで、寿命判断器１６Ｃに記憶された蓄
電池異常値は、放電開始時の電圧が最も低くなる１００
％負荷の条件で予め設定し、固定とする。但し、負荷１
５の容量が事前に判っている場合には、その容量での蓄
電池放電電圧特性により固定する蓄電池異常検出値を設
定する。Here, the abnormal value of the storage battery stored in the life judging unit 16C is set to 100 at which the voltage at the start of discharge becomes lowest.
It is set in advance under the condition of% load and fixed. However, load 1
If the capacity of the battery 5 is known in advance, a storage battery abnormality detection value fixed based on the storage battery discharge voltage characteristic at that capacity is set.
【００２０】図２は、商用電源２に停電が発生した場合
の蓄電池１１の放電電圧特性を納入（新品）時と寿命期
で示している。尚、図中、Ａは納入（新品）時の蓄電池
の放電開始電圧、Ｂは寿命期の蓄電池の放電開始電圧、
Ｃは直流不足電圧予告値、Ｄは直流不足電圧値、Ｅは蓄
電池異常値、Ｘは寿命期の蓄電池の放電電圧特性、Ｙは
納入（新品）時の蓄電池の放電電圧特性を夫々示してい
る。FIG. 2 shows the discharge voltage characteristics of the storage battery 11 when a power failure occurs in the commercial power supply 2 at the time of delivery (new) and at the end of its life. In the figure, A is the discharge starting voltage of the storage battery at the time of delivery (new), B is the discharge starting voltage of the storage battery during its life,
C is a DC undervoltage notice value, D is a DC undervoltage value, E is a storage battery abnormal value, X is a discharge voltage characteristic of the storage battery during its life, and Y is a discharge voltage characteristic of the storage battery at the time of delivery (new). .
【００２１】従来では、先に述べたように蓄電池の寿命
は蓄電池メーカにより充電状態での各セル電圧を測定し
判断しており、図２に示した放電電圧測定はさらに正確
な寿命判定のためユーザーからの要求があった場合にの
みメーカの工場に蓄電池数セルを引き取って試験を行う
が、これには費用を要するためあまり実施していないの
が現状である。Conventionally, as described above, the life of a storage battery is determined by measuring each cell voltage in a charged state by a storage battery maker. The discharge voltage measurement shown in FIG. 2 is used for more accurate life determination. Only when requested by the user, a test is performed by taking out a few cells of the storage battery at the maker's factory, but this is costly and is not practiced much.
【００２２】しかしながら、蓄電池１１を寿命期を越え
て使用していた場合には商用電源２の瞬時電圧低下に対
してもバックアップ出来ない可能性があることから、出
来るだけ多くのデータで蓄電池の寿命をより正確に判定
することが非常に重要となる。However, if the storage battery 11 has been used beyond the service life, it may not be possible to back up even if the instantaneous voltage drop of the commercial power supply 2 occurs. It is very important to determine more accurately.
【００２３】図２の蓄電池放電電圧特性を見ると、寿命
期の蓄電池は納入（新品）時の蓄電池と比べると、蓄電
池不足電圧に至る時間が短くなることは当然であるが、
放電開始時の電圧も納入（新品）時と比べると低くなる
ことが判る。Referring to the discharge voltage characteristics of the storage battery in FIG. 2, it is natural that the storage battery in the life period has a shorter time to the storage battery undervoltage than the storage battery at the time of delivery (new).
It can be seen that the voltage at the start of discharge is lower than that at the time of delivery (new).
【００２４】本実施の形態の動作について、図３を用い
て説明する。図３に示すように、商用電源２に停電が生
ずる（交流入力３が停電する）と、蓄電池１１の直流エ
ネルギーが逆変換器６に供給され、ＵＰＳ１の交流出力
１４は負荷１５に連続して供給する。その際、直流電圧
計測回路１６の寿命判断器１６Ｃにおいて、蓄電池１１
が寿命期に近いか否かを判断するため、蓄電池１１の放
電開始電圧が蓄電池異常値Ｅと比較される。その結果、
蓄電池１１の放電開始電圧が蓄電池異常値Ｅ以下である
場合は、「寿命期に近い」と判断し、外部にその旨警報
する。The operation of this embodiment will be described with reference to FIG. As shown in FIG. 3, when a power failure occurs in the commercial power supply 2 (AC input 3 fails), the DC energy of the storage battery 11 is supplied to the inverter 6, and the AC output 14 of the UPS 1 continues to the load 15. Supply. At this time, in the life determining unit 16C of the DC voltage measuring circuit 16, the storage battery 11
Is determined to be close to the end of its life, the discharge start voltage of the storage battery 11 is compared with the storage battery abnormal value E. as a result,
If the discharge start voltage of the storage battery 11 is equal to or lower than the storage battery abnormal value E, it is determined that the battery is near the end of its life and an external alarm is issued.
【００２５】そして、「寿命期に近い」と判断された場
合は、直流電圧計測回路１６の不足電圧警告器１６Ｂに
おいて、図２の蓄電池放電電圧特性の曲線Ｘに基づい
て、蓄電池１１の放電電圧が、直流不足電圧予告値Ｃ以
下であるかどうか比較する。その結果、直流不足電圧予
告値Ｃ以下である場合には、「もうすぐ電圧不足とな
る」と判断し、外部にその旨警報し、そうでない場合に
は、蓄電池１１は、直流エネルギーを逆変換器６に供給
する。If it is determined that the battery is near the end of its life, the undervoltage warning device 16B of the DC voltage measuring circuit 16 outputs the discharge voltage of the storage battery 11 based on the storage battery discharge voltage characteristic curve X in FIG. Is less than or equal to the DC undervoltage notice value C or not. As a result, if it is less than or equal to the DC undervoltage notice value C, it is determined that "the voltage will soon be insufficient" and an alarm is issued to the outside, and if not, the storage battery 11 converts the DC energy into an inverse converter. 6
【００２６】また、「寿命期に近い」と判断された場合
は、直流電圧計測回路１６の直流不足電圧比較器１６Ａ
において、図２の蓄電池放電電圧特性の曲線Ｘに基づい
て、蓄電池１１の放電電圧が、直流不足電圧値Ｄ以下で
あるかどうか比較する。その結果、直流不足電圧値Ｄ以
下である場合には、「電圧不足」と判断し、ＵＰＳ１は
トリップ停止する。そうでない場合には、蓄電池１１
は、直流エネルギーを逆変換器６に供給する。On the other hand, if it is determined that the battery is near the end of its life, the DC undervoltage comparator 16A of the DC voltage measurement circuit 16
In FIG. 2, a comparison is made as to whether the discharge voltage of the storage battery 11 is equal to or less than the DC shortage voltage value D based on the storage battery discharge voltage characteristic curve X in FIG. As a result, when the voltage is less than the DC shortage voltage value D, it is determined that “voltage is insufficient”, and the UPS 1 stops tripping. Otherwise, the storage battery 11
Supplies DC energy to the inverter 6.
【００２７】他方、「寿命期に近い」と判断されなかっ
た場合は、直流電圧計測回路１６の不足電圧警告器１６
Ｂにおいて、図２の蓄電池放電電圧特性の曲線Ｙに基づ
いて、蓄電池１１の放電電圧が、直流不足電圧予告値Ｃ
以下であるかどうか比較する。その結果、直流不足電圧
予告値Ｃ以下である場合には、「もうすぐ電圧不足とな
る」と判断し、外部にその旨警報し、そうでない場合に
は、蓄電池１１は、直流エネルギーを逆変換器６に供給
する。On the other hand, if it is not determined that the battery is near the end of its life, the undervoltage warning device 16 of the DC voltage measurement circuit 16
In FIG. 2B, the discharge voltage of the storage battery 11 is changed based on the storage battery discharge voltage characteristic curve Y in FIG.
Compare for: As a result, if it is less than or equal to the DC undervoltage notice value C, it is determined that "the voltage will soon be insufficient" and an alarm is issued to the outside, and if not, the storage battery 11 converts the DC energy into an inverse converter. 6
【００２８】また、「寿命期に近い」と判断された場合
は、直流電圧計測回路１６の直流不足電圧比較器１６Ａ
において、図２の蓄電池放電電圧特性の曲線Ｙに基づい
て、蓄電池１１の放電電圧が、直流不足電圧値Ｄ以下で
あるかどうか比較する。その結果、直流不足電圧値Ｄ以
下である場合には、「電圧不足」と判断し、ＵＰＳ１は
トリップ停止する。そうでない場合には、蓄電池１１
は、直流エネルギーを逆変換器６に供給する。On the other hand, if it is determined that the battery is near the end of its life, the DC undervoltage comparator 16A of the DC voltage measuring circuit 16
In the above, it is compared whether the discharge voltage of the storage battery 11 is equal to or less than the DC shortage voltage value D based on the storage battery discharge voltage characteristic curve Y in FIG. As a result, when the voltage is less than the DC shortage voltage value D, it is determined that “voltage is insufficient”, and the UPS 1 stops tripping. Otherwise, the storage battery 11
Supplies DC energy to the inverter 6.
【００２９】従って、蓄電池１１の寿命を判断し、寿命
に応じた蓄電池１１の放電制御を行なうことができる。
即ち、納入時の蓄電池１１であれば、放電時間１０分が
補償され、寿命期に近い蓄電池１１であれば、放電時間
５分しか補償されない。Therefore, the life of the storage battery 11 can be determined, and the discharge of the storage battery 11 can be controlled in accordance with the life.
That is, in the case of the storage battery 11 at the time of delivery, the discharge time is compensated for 10 minutes, and in the case of the storage battery 11 near the end of its life, only the discharge time is compensated for 5 minutes.
【００３０】（第２の実施の形態）以下、本発明の第２
の実施の形態について図４乃至図６を参照して説明す
る。図４に示すように、本実施の形態においては、第１
の実施の形態のＵＰＳの蓄電池異常値Ｅに直流電流計測
回路１７からの蓄電池放電電流Ｉの要素を付加したもの
となっている。(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described.
The embodiment will be described with reference to FIGS. As shown in FIG. 4, in the present embodiment, the first
In this embodiment, the element of the storage battery discharge current I from the DC current measuring circuit 17 is added to the storage battery abnormal value E of the UPS.
【００３１】商用電源２が停電した時の蓄電池１１の放
電電圧特性は、その時の負荷１５の容量で異なる。この
ため、本実施の形態では、蓄電池１１が寿命期に近いか
どうかをより正確に判別するために、直流電圧計測回路
１６の寿命判断器１６Ｃは蓄電池１１が放電した時の直
流電流Ｉによりその直流電流Ｉに対して寿命期に近いと
判断できる蓄電池異常値を自動的に算出して第１の実施
の形態と同様に保護する。The discharge voltage characteristic of the storage battery 11 when the commercial power supply 2 is out of power differs depending on the capacity of the load 15 at that time. For this reason, in the present embodiment, in order to more accurately determine whether or not the storage battery 11 is near the end of its life, the life determiner 16C of the DC voltage measurement circuit 16 uses the DC current I when the storage battery 11 is discharged. The storage battery abnormal value that can be determined to be near the end of the life with respect to the DC current I is automatically calculated and protected in the same manner as in the first embodiment.
【００３２】これにより、負荷１５の容量が少ない場合
においても、それに合った蓄電池放電開始時の電圧を算
出することでより正確に蓄電池１１が寿命に近いかどう
かを判断することができる。Accordingly, even when the capacity of the load 15 is small, it is possible to more accurately determine whether or not the storage battery 11 is near the end of its life by calculating the voltage at the start of discharging the storage battery.
【００３３】尚、蓄電池１１が放電したときの負荷１５
の容量を知る手段を上記では直流電流Ｉで行ったが、同
様にＵＰＳ１の出力電流を使っても行うことができる。
図５は、本実施の形態での蓄電池放電電圧特性を示した
ものである。The load 15 when the storage battery 11 is discharged
In the above description, the means for determining the capacity is performed by using the DC current I, but the capacity can be similarly obtained by using the output current of the UPS 1.
FIG. 5 shows the discharge voltage characteristics of the storage battery in the present embodiment.
【００３４】尚、図中、Ａは納入（新品）時の蓄電池の
放電開始電圧、Ｂは寿命期の蓄電池の放電開始電圧、Ｃ
は直流不足電圧予告値、Ｄは直流不足電圧値、Ｅ１，Ｅ
２は蓄電池異常値、Ｘ１，Ｘ２は寿命期の蓄電池の放電
電圧特性、Ｙ１，Ｙ２は納入（新品）時の蓄電池の放電
電圧特性を夫々示している。また、図６は、本実施の形
態での商用電源２停電時の動作を示したものである。In the figure, A is the discharge starting voltage of the storage battery at the time of delivery (new), B is the discharge starting voltage of the storage battery during its life, C
Is the DC undervoltage notice value, D is the DC undervoltage value, E1, E
2 indicates an abnormal value of the storage battery, X1 and X2 indicate the discharge voltage characteristics of the storage battery during its life, and Y1 and Y2 indicate the discharge voltage characteristics of the storage battery at the time of delivery (new). FIG. 6 shows an operation at the time of the commercial power supply 2 blackout in the present embodiment.
【００３５】[0035]
【発明の効果】以上説明したように、本発明によれば、
通常の運用の中で蓄電池が寿命期に近いかどうか判断で
きる無停電電源装置を提供することができる。As described above, according to the present invention,
It is possible to provide an uninterruptible power supply that can determine whether or not the storage battery is near the end of its life in normal operation.
【図１】 本発明の第１の実施の形態を示す概要構成
図。FIG. 1 is a schematic configuration diagram showing a first embodiment of the present invention.
【図２】 本発明の第１の実施の形態における蓄電池
の放電特性等を示すグラフ。FIG. 2 is a graph showing discharge characteristics and the like of the storage battery according to the first embodiment of the present invention.
【図３】 本発明の第１の実施の形態による商用電源
停電時の動作を示すフローチャート。FIG. 3 is a flowchart showing an operation at the time of a commercial power failure according to the first embodiment of the present invention.
【図４】 本発明の第２の実施の形態を示す概要構成
図。FIG. 4 is a schematic configuration diagram showing a second embodiment of the present invention.
【図５】 本発明の第２の実施の形態における蓄電池
の放電特性等を示すグラフ。FIG. 5 is a graph showing discharge characteristics and the like of a storage battery according to a second embodiment of the present invention.
【図６】 本発明の第２の実施の形態による商用電源
停電時の動作を示すフローチャート。FIG. 6 is a flowchart showing an operation at the time of a commercial power failure according to the second embodiment of the present invention.
【図７】 一般的な無停電電源装置を示す概要構成
図。FIG. 7 is a schematic configuration diagram showing a general uninterruptible power supply.
１…ＵＰＳ、２…商用電源、３…交流入力、４…交流入
力遮断器、５…順変換器、６…逆変換器、７…無瞬断切
換回路、８…電磁接触器、９…サイリスタスイッチ、１
０…直流遮断器、１１…蓄電池、１２…バイパス入力遮
断器、１３…バイパス回路、１５…負荷、１６…直流電
圧計測回路、１６Ａ…直流不足電圧比較器、１６Ｂ…不
足電圧警告器、１６Ｃ…寿命判断器、１７…直流電流計
測回路。DESCRIPTION OF SYMBOLS 1 ... UPS, 2 ... Commercial power supply, 3 ... AC input, 4 ... AC input breaker, 5 ... Forward converter, 6 ... Reverse converter, 7 ... Non-interruptible switching circuit, 8 ... Electromagnetic contactor, 9 ... Thyristor Switch, 1
0: DC circuit breaker, 11: Storage battery, 12: Bypass input circuit breaker, 13: Bypass circuit, 15: Load, 16: DC voltage measurement circuit, 16A: DC undervoltage comparator, 16B: Undervoltage alarm, 16C ... Life determinator, 17: DC current measurement circuit.
Claims (3)
変換して出力する順変換器と、この順変換器からの直流
出力を入力とし、直流を再び交流に変換して出力する逆
変換器と、前記商用電源の停電時に前記逆変換器に直流
電力を供給するエネルギー蓄積部と、保守点検や故障の
際に前記商用電源により負荷への給電を継続させるバイ
パス回路と、このバイパス回路に無瞬断で切り換える無
瞬断切換回路と、前記商用電源の停電で前記エネルギー
蓄積部が放電した時の放電開始時の電圧を検出し、この
検出値と予め設定された値とを比較し、この比較結果に
応じて前記エネルギー蓄積部が寿命期であるかどうかを
判断する判断回路とを具備したことを特徴とする無停電
電源装置。1. A forward converter for converting an alternating current input from a commercial power supply into a direct current and outputting the same, and an inverse converter for receiving a direct current output from the forward converter as an input and converting the direct current to an alternating current again for output. An energy storage unit for supplying DC power to the inverter when the commercial power supply fails, a bypass circuit for continuing power supply to the load by the commercial power supply in the case of maintenance or a failure, and a bypass circuit. An instantaneous interruption switching circuit that switches by an instantaneous interruption, detects a voltage at the start of discharge when the energy storage unit is discharged due to a power failure of the commercial power supply, compares the detected value with a preset value, An uninterruptible power supply, comprising: a determination circuit that determines whether the energy storage unit is in the end of its life according to the comparison result.
知らせる通報手段を具備したことを特徴とする請求項１
記載の無停電電源装置。2. A notifying means for notifying a judgment result from the judgment circuit to the outside.
The uninterruptible power supply as described.
前記エネルギー蓄積部の放電時の電流に基づき算出され
たことを特徴とする請求項１記載の無停電電源装置。3. The value preset in the determination circuit is:
The uninterruptible power supply according to claim 1, wherein the power is calculated based on a current at the time of discharging of the energy storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158874A JP2000350384A (en) | 1999-06-07 | 1999-06-07 | Uninterruptible power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158874A JP2000350384A (en) | 1999-06-07 | 1999-06-07 | Uninterruptible power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000350384A true JP2000350384A (en) | 2000-12-15 |
Family
ID=15681297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11158874A Pending JP2000350384A (en) | 1999-06-07 | 1999-06-07 | Uninterruptible power supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000350384A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084682A (en) * | 2000-09-05 | 2002-03-22 | Fuji Electric Co Ltd | Uninterruptible power-supply unit and its inspection method |
| JP2004328928A (en) * | 2003-04-25 | 2004-11-18 | Densei Lambda Kk | Uninterruptible power system and on-line deterioration determination method for battery of uninterruptible power system |
| JP2009232541A (en) * | 2008-03-21 | 2009-10-08 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply and testing method therefor |
| JP2013141379A (en) * | 2012-01-06 | 2013-07-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
| WO2014198044A1 (en) * | 2013-06-13 | 2014-12-18 | Firebright1 Green Energy(Shanghai) Limited. | Battery energy storage system and controlling method |
| JP2016144379A (en) * | 2015-02-05 | 2016-08-08 | 東芝三菱電機産業システム株式会社 | Uninterruptible power supply system |
| CN106712272A (en) * | 2015-11-18 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Uninterrupted power source system |
-
1999
- 1999-06-07 JP JP11158874A patent/JP2000350384A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002084682A (en) * | 2000-09-05 | 2002-03-22 | Fuji Electric Co Ltd | Uninterruptible power-supply unit and its inspection method |
| JP4649716B2 (en) * | 2000-09-05 | 2011-03-16 | 富士電機システムズ株式会社 | Uninterruptible power supply and uninterruptible power supply inspection method |
| JP2004328928A (en) * | 2003-04-25 | 2004-11-18 | Densei Lambda Kk | Uninterruptible power system and on-line deterioration determination method for battery of uninterruptible power system |
| JP4552385B2 (en) * | 2003-04-25 | 2010-09-29 | 富士電機システムズ株式会社 | Uninterruptible power supply and on-line degradation judgment method for uninterruptible power supply battery |
| JP2009232541A (en) * | 2008-03-21 | 2009-10-08 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply and testing method therefor |
| JP2013141379A (en) * | 2012-01-06 | 2013-07-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
| WO2014198044A1 (en) * | 2013-06-13 | 2014-12-18 | Firebright1 Green Energy(Shanghai) Limited. | Battery energy storage system and controlling method |
| JP2016144379A (en) * | 2015-02-05 | 2016-08-08 | 東芝三菱電機産業システム株式会社 | Uninterruptible power supply system |
| CN106712272A (en) * | 2015-11-18 | 2017-05-24 | 中国移动通信集团设计院有限公司 | Uninterrupted power source system |
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