JP2011010417A - Uninterruptible power supply device - Google Patents

Uninterruptible power supply device Download PDF

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JP2011010417A
JP2011010417A JP2009149913A JP2009149913A JP2011010417A JP 2011010417 A JP2011010417 A JP 2011010417A JP 2009149913 A JP2009149913 A JP 2009149913A JP 2009149913 A JP2009149913 A JP 2009149913A JP 2011010417 A JP2011010417 A JP 2011010417A
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storage battery
power supply
uninterruptible power
current
discharge
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Fumitoshi Emura
文敏 江村
Hideaki Kunisada
秀明 国貞
Hiroaki Miyata
博昭 宮田
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Hitachi Ltd
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Hitachi Ltd
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    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

PROBLEM TO BE SOLVED: To exactly recognize the aged deterioration of an accumulator battery by using an uninterruptible power supply device which can discharge the accumulator battery at a constant current every time without depending on a magnitude of a load connected to the output side of the uninterruptible power supply device.SOLUTION: In a state that the uninterruptible power supply device is operated by a commercial AC power supply, a rectifier or an accumulator battery voltage stepping-up/down circuit of the uninterruptible power supply device discharges the accumulator battery while controlling the constant current, the accumulator battery is thereby discharged at the constant current every time without depending on the magnitude of the load, and a characteristic of the accumulator battery at that time is measured.

Description

本発明は、無停電電源装置における高い健全性の提供に関するものである。   The present invention relates to providing high soundness in an uninterruptible power supply.

停電が発生したときにも運用を継続する必要がある計算機や通信のシステムにおいては、蓄電池などの電力を使用して負荷装置への給電を継続させる無停電電源装置を使用することが多い。図８に示すように、無停電電源装置１は、常時は交流入力電力を電力変換した交流出力電力または交流入力電力を負荷装置３に供給している。それと同時に、蓄電池２などの蓄電要素にエネルギーを蓄えている。ここで、４は整流器、５はインバータ、６は直送給電切換器、７は停電検出器、８は上記各要素の動作を制御する制御装置である。   In a computer or communication system that needs to continue operation even when a power failure occurs, an uninterruptible power supply device that uses power from a storage battery or the like to continue supplying power to a load device is often used. As shown in FIG. 8, the uninterruptible power supply 1 always supplies the load device 3 with AC output power or AC input power obtained by converting AC input power. At the same time, energy is stored in a power storage element such as the storage battery 2. Here, 4 is a rectifier, 5 is an inverter, 6 is a direct feed switch, 7 is a power failure detector, and 8 is a control device that controls the operation of each of the above elements.

停電が発生したときには、図９に示すように、蓄電池２のエネルギーを電力変換した交流出力電力を負荷装置３に供給する。蓄電池２には経年劣化による寿命があり、また無停電電源装置１の系全体において蓄電池２の故障率は比較的高い。このため、高い給電信頼性を必要とするシステムにおいては、無停電電源装置１が停電発生時に健全に動作するようにするために、蓄電池の健全性確認を定期的に実施することが求められる。   When a power failure occurs, AC output power obtained by converting the energy of the storage battery 2 is supplied to the load device 3 as shown in FIG. The storage battery 2 has a lifetime due to deterioration over time, and the failure rate of the storage battery 2 in the entire system of the uninterruptible power supply 1 is relatively high. For this reason, in a system that requires high power supply reliability, it is required to periodically check the health of the storage battery so that the uninterruptible power supply 1 operates soundly when a power failure occurs.

蓄電池の健全性確認としては、特許文献１のように、蓄電池内部抵抗や蓄電池電圧を測定する蓄電池監視システムが提案されている。一般に、蓄電池内部抵抗を測定する際には蓄電池放電を行う必要があるが、十分大きな電流での蓄電池放電によって蓄電池内部抵抗を測定しようとすると、蓄電池監視システムの装置が高価になったり大形になったりする。   As a confirmation of the soundness of a storage battery, a storage battery monitoring system that measures storage battery internal resistance and storage battery voltage as proposed in Patent Document 1 has been proposed. Generally, when measuring the internal resistance of a storage battery, it is necessary to discharge the storage battery. However, if the internal resistance of the storage battery is measured by discharging the storage battery at a sufficiently large current, the storage battery monitoring system becomes expensive or large. It becomes.

このため、無停電電源装置で蓄電池放電させることによって、十分大きな電流での蓄電池放電を行い、蓄電池内部抵抗を測定するシステムが提案されている。蓄電池の経年変化を正確に把握するためには、毎回同一の測定条件（蓄電池放電電流等）のもとで蓄電池内部抵抗等の特性を測定する必要がある。   For this reason, a system has been proposed in which a storage battery is discharged with a sufficiently large current by discharging the storage battery with an uninterruptible power supply, and the internal resistance of the storage battery is measured. In order to accurately grasp the secular change of the storage battery, it is necessary to measure the characteristics such as the internal resistance of the storage battery under the same measurement conditions (storage battery discharge current, etc.) every time.

従来の無停電電源装置では、整流器を停止させて交流入力電力を零にした状態で蓄電池放電をさせるため、蓄電池放電電流は図１０Ａ、または図１０Ｂのように、出力側に接続された負荷の大きさに依存して変動していた。   In the conventional uninterruptible power supply, in order to discharge the storage battery in a state where the rectifier is stopped and the AC input power is zero, the storage battery discharge current is the load connected to the output side as shown in FIG. 10A or 10B. It varied depending on the size.

特開２００６−８００３２号公報JP 2006-80032 A

本発明の課題は、無停電電源装置の出力側に接続された負荷の大きさに依存せず、毎回一定電流で蓄電池放電が可能な無停電電源装置によって、蓄電池の経年劣化を正確に把握できるようにすることである。   The problem of the present invention is that it does not depend on the size of the load connected to the output side of the uninterruptible power supply, and the uninterruptible power supply capable of discharging the battery with a constant current every time can accurately grasp the aging of the storage battery. Is to do so.

本発明は、商用交流電源を整流して直流変換する整流器と、蓄電池と、前記整流器または蓄電池の直流を交流変換するインバータと、各構成要素の動作を制御する制御装置を有し、商用交流電源の停電時に蓄電池から負荷に給電を行う無停電電源装置において、前記制御装置に、前記蓄電池の放電電流を一定に制御する蓄電池電流一定制御手段を設け、商用交流電源による運転中に、前記蓄電池電流一定制御手段により負荷容量にかかわらず任意の一定電流での蓄電池放電を行わせることを特徴とする。   The present invention includes a rectifier that rectifies and converts a commercial AC power source into a DC, a storage battery, an inverter that converts the DC of the rectifier or the storage battery into an AC, and a control device that controls the operation of each component. In the uninterruptible power supply that supplies power from the storage battery to the load at the time of a power failure, the control device is provided with a storage battery current constant control means for controlling the discharge current of the storage battery to be constant, and the storage battery current is The storage battery is discharged at an arbitrary constant current regardless of the load capacity by the constant control means.

また、蓄電池電流一定制御手段により毎回同一の任意の一定電流で蓄電池放電を行わせたときの、蓄電池特性の蓄電池電圧及び蓄電池内部抵抗の少なくとも一つを測定して、蓄電池の健全性診断を行う健全性確認手段を設けたことを特徴とする。   In addition, the storage battery current diagnosis is performed by measuring at least one of the storage battery voltage and the storage battery internal resistance when the storage battery discharge is performed at the same arbitrary constant current each time by the storage battery current constant control means. A soundness confirmation means is provided.

また、蓄電池電流一定制御手段により毎回同一の任意の一定電流で蓄電池放電を行わせたときの、蓄電池電圧及び蓄電池内部抵抗の少なくとも一つの経時変化を測定して、蓄電池の健全性診断を行う健全性確認手段を設けたことを特徴とする。   In addition, a soundness diagnosis is performed by measuring at least one time-dependent change of the storage battery voltage and the internal resistance of the storage battery when the storage battery discharge is performed at the same arbitrary constant current each time by the storage battery current constant control means. It is characterized in that a sex confirmation means is provided.

また、予め設定された時間毎に、定期的に任意の一定電流で蓄電池放電を行わせる試験用放電指令手段を設けたことを特徴とする。   Further, it is characterized in that a test discharge command means for periodically discharging the storage battery with an arbitrary constant current is provided for each preset time.

さらに、無停電電源装置に対し、遠隔操作によって、前記蓄電池電流一定制御手段により任意の一定電流で蓄電池放電を行わせる遠隔制御装置を設けたことを特徴とする。   The uninterruptible power supply device is further provided with a remote control device for discharging the storage battery with an arbitrary constant current by the storage battery current constant control means by remote control.

本発明は、無停電電源装置に、蓄電池の放電電流を一定に制御する蓄電池電流一定制御手段を設け、商用交流電源による運転中に、前記蓄電池電流一定制御手段により負荷容量にかかわらず任意の一定電流での蓄電池放電を行わせ、蓄電池の健全性診断を行い、蓄電池の経年劣化を正確に把握できるという従来にない効果を実現する。   The present invention provides an uninterruptible power supply device with a storage battery current constant control means for controlling the discharge current of the storage battery to be constant, and during operation by a commercial AC power source, the storage battery current constant control means allows any constant regardless of load capacity. It achieves an unprecedented effect in that the storage battery is discharged with current, the soundness diagnosis of the storage battery is performed, and the deterioration over time of the storage battery can be accurately grasped.

本発明の実施例１の無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device of Example 1 of this invention. 実施例１の小負荷時の蓄電池放電運転状態における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device in the storage battery discharge driving | running state at the time of the small load of Example 1. FIG. 実施例１の大負荷時の蓄電池放電運転状態における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device in the storage battery discharge driving | running state at the time of heavy load of Example 1. FIG. 本発明の実施例２の無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device of Example 2 of this invention. 実施例２の小負荷時の蓄電池放電運転状態における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device in the storage battery discharge operation state at the time of the small load of Example 2. 実施例２の大負荷時の蓄電池放電運転状態における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device in the storage battery discharge operation state at the time of heavy load of Example 2. 本発明の実施例３の無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device of Example 3 of this invention. 実施例３の停電時における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device at the time of the power failure of Example 3. 実施例３の測定時における無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device at the time of the measurement of Example 3. FIG. 実施例３に遠隔制御装置を付加した無停電電源装置を示すブロック図である。It is a block diagram which shows the uninterruptible power supply device which added the remote control apparatus to Example 3. 従来の無停電電源装置の通常運転状態におけるブロック図である。It is a block diagram in the normal operation state of the conventional uninterruptible power supply. 従来の無停電電源装置の蓄電池放電運転状態におけるブロック図である。It is a block diagram in the storage battery discharge driving | running state of the conventional uninterruptible power supply. 従来の無停電電源装置の大負荷時の蓄電池放電電流状態を示すブロック図である。It is a block diagram which shows the storage battery discharge current state at the time of heavy load of the conventional uninterruptible power supply. 従来の無停電電源装置の小負荷時の蓄電池放電電流状態を示すブロック図である。It is a block diagram which shows the storage battery discharge current state at the time of the small load of the conventional uninterruptible power supply.

以下本発明の実施例を図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１、図２Ａ、図２Ｂは、無停電電源装置の整流器に、蓄電池放電時の蓄電池電流一定制御手段を設けた例を示す。   1, 2A, and 2B show an example in which storage battery current constant control means during storage battery discharge is provided in the rectifier of the uninterruptible power supply.

通常運転時は従来の無停電電源装置と同じく、図１に示すように整流器４は直流電圧一定制御手段９によって直流電圧を出力している。   During normal operation, the rectifier 4 outputs a DC voltage by the DC voltage constant control means 9 as shown in FIG.

測定のために蓄電池２の放電を行うときには、整流器４は蓄電池電流一定制御手段１０によって直流電圧を出力する。蓄電池放電電流が目標値よりも小さいときには、整流器４の直流電圧出力を小さくし、蓄電池放電電流が目標値よりも大きいときには、整流器４の直流電圧出力を大きくすることで、図２Ａ、図２Ｂに示すように負荷の大きさに依存せず常に蓄電池電流を一定に維持する。１１はインバータ５の交流出力を制御する交流出力電圧一定制御手段であり、整流器の出力電圧の大小にかかわらず一定の交流電圧を出力する。   When discharging the storage battery 2 for measurement, the rectifier 4 outputs a DC voltage by the storage battery current constant control means 10. When the storage battery discharge current is smaller than the target value, the DC voltage output of the rectifier 4 is reduced, and when the storage battery discharge current is higher than the target value, the DC voltage output of the rectifier 4 is increased, so that FIG. 2A and FIG. As shown, the battery current is always kept constant regardless of the size of the load. 11 is an AC output voltage constant control means for controlling the AC output of the inverter 5, and outputs a constant AC voltage regardless of the output voltage of the rectifier.

このような構成とすることによって、負荷の大きさに依存せずに、予め設定した電流で蓄電池を放電することができる。   By setting it as such a structure, a storage battery can be discharged with the preset electric current, without depending on the magnitude | size of load.

図３、図４Ａ、図４Ｂは、無停電電源装置の蓄電池電圧昇降圧回路に蓄電池放電時の蓄電池電流一定制御手段を設けた例を示す。通常運転時は、従来の無停電電源装置と同様に、図３に示すように整流器４は直流電圧一定制御手段９によって直流電圧を出力している。また、蓄電池電圧昇降圧回路２０は蓄電池電圧一定制御手段２１によって蓄電池２を充電している。   3, 4A, and 4B show an example in which a storage battery current constant control means during storage battery discharge is provided in the storage battery voltage step-up / down circuit of the uninterruptible power supply. During normal operation, the rectifier 4 outputs a DC voltage by the DC voltage constant control means 9 as shown in FIG. The storage battery voltage step-up / step-down circuit 20 charges the storage battery 2 by the storage battery voltage constant control means 21.

測定のために蓄電池放電を行うときには、図４Ａ、図４Ｂに示すように蓄電池電圧昇降圧回路２０は蓄電池電流一定制御手段２２によって一定電流で蓄電池２を放電し、整流器出力の直流電圧が上昇する。整流器２は直流電圧一定制御手段９によって、直流電圧が目標値より大きいときには商用電源からの入力電力を抑制し、直流電圧が目標値より小さいときには入力電力を増大する。   When discharging the storage battery for measurement, as shown in FIGS. 4A and 4B, the storage battery voltage step-up / step-down circuit 20 discharges the storage battery 2 with a constant current by the storage battery current constant control means 22, and the DC voltage of the rectifier output increases. . The rectifier 2 uses the DC voltage constant control means 9 to suppress the input power from the commercial power source when the DC voltage is larger than the target value, and increase the input power when the DC voltage is smaller than the target value.

このような構成とすることによって、図４Ａ、図４Ｂのように負荷の大きさに依存せずに、予め設定した電流で蓄電池２を放電することができる。   By setting it as such a structure, the storage battery 2 can be discharged with the preset electric current, without depending on the magnitude | size of load like FIG. 4A and FIG. 4B.

図５、図６Ａ、図６Ｂは、実施例３において、無停電電源装置の蓄電池診断運転状態を示したものである。蓄電池２には蓄電池電圧および蓄電池内部抵抗の少なくとも一つの値もしくはその経時変化による蓄電池の健全性確認手段として、無停電電源装置外部試験用放電指令手段３０が設けられる。無停電電源装置外部試験用放電指令手段３０は無停電電源装置１に内蔵されていても良く、電流検出回路３１、電圧検出回路３２、内部抵抗検出回路３３を有する。また、試験用放電指令手段４０が設けられる。図５の通常運転時は蓄電池２に充電される。停電時は図６Ａに示すように、蓄電池２から給電される。蓄電池の健全性診断のために蓄電池放電を行うときには、験用放電指令手段４０の信号に基づき図６Ｂに示すように負荷の大きさに依存せずに、予め設定した一定電流で蓄電池２を放電し、無停電電源装置外部試験用放電指令手段３０により蓄電池の各種データが測定される。   5, 6A, and 6B show the storage battery diagnosis operation state of the uninterruptible power supply in Example 3. FIG. The storage battery 2 is provided with an uninterruptible power supply external test discharge command means 30 as means for checking the soundness of the storage battery based on at least one value of the storage battery voltage and the internal resistance of the storage battery or its change over time. The uninterruptible power supply external test discharge command means 30 may be incorporated in the uninterruptible power supply 1 and includes a current detection circuit 31, a voltage detection circuit 32, and an internal resistance detection circuit 33. In addition, a test discharge command means 40 is provided. During normal operation in FIG. 5, the storage battery 2 is charged. During a power failure, power is supplied from the storage battery 2 as shown in FIG. 6A. When discharging the storage battery for the health diagnosis of the storage battery, the storage battery 2 is discharged with a preset constant current without depending on the load size as shown in FIG. 6B based on the signal of the test discharge command means 40. Then, various data of the storage battery are measured by the uninterruptible power supply external test discharge command means 30.

蓄電池の健全性確認のための蓄電池放電運転指令については、試験用放電指令手段４０により予め設定した時間毎に定期的に指令を行うが、図７に示すように、遠隔制御装置５０を設けて、通信手段を用いて遠隔操作によって指令を行うことにしてもよい。   The storage battery discharge operation command for confirming the health of the storage battery is periodically commanded every time set in advance by the test discharge command means 40. As shown in FIG. 7, a remote control device 50 is provided. The command may be given by remote operation using the communication means.

１：無停電電源装置
２：蓄電池
３：負荷装置
４：整流器
５：インバータ
８：制御装置
９：直流電圧一定制御手段
１０：蓄電池電流一定制御手段
２０：蓄電池電圧昇降圧回路
２２：蓄電池電流一定制御手段
３０：無停電電源装置外部試験用放電指令手段
４０：試験用放電指令手段
５０：遠隔制御装置 1: uninterruptible power supply 2: storage battery 3: load device 4: rectifier 5: inverter 8: control device 9: DC voltage constant control means 10: storage battery current constant control means 20: storage battery voltage step-up / down circuit 22: storage battery current constant control Means 30: Uninterruptible power supply external test discharge command means 40: Test discharge command means 50: Remote control device

Claims (5)

商用交流電源を整流して直流変換する整流器と、蓄電池と、前記整流器または蓄電池の直流を交流変換するインバータと、各構成要素の動作を制御する制御装置を有し、商用交流電源の停電時に蓄電池から負荷に給電を行う無停電電源装置において、
前記制御装置に、前記蓄電池の放電電流を一定に制御する蓄電池電流一定制御手段を設け、商用交流電源による運転中に、前記蓄電池電流一定制御手段により負荷容量にかかわらず任意の一定電流での蓄電池放電を行わせることを特徴とする無停電電源装置。 A rectifier that rectifies a commercial AC power supply and converts it into a direct current, a storage battery, an inverter that converts the direct current of the rectifier or the storage battery into an alternating current, and a control device that controls the operation of each component. In the uninterruptible power supply that supplies power to the load from
The control device is provided with a storage battery current constant control means for controlling the discharge current of the storage battery to be constant, and during operation by a commercial AC power source, the storage battery with an arbitrary constant current regardless of the load capacity by the storage battery current constant control means. An uninterruptible power supply characterized by discharging. 請求項１に記載された無停電電源装置において、前記蓄電池電流一定制御手段により毎回同一の任意の一定電流で蓄電池放電を行わせたときの、蓄電池特性の蓄電池電圧および蓄電池内部抵抗の少なくとも一つを測定して、蓄電池の健全性診断を行う健全性確認手段を設けたことを特徴とする無停電電源装置。   2. The uninterruptible power supply according to claim 1, wherein at least one of a storage battery voltage and a storage battery internal resistance when the storage battery discharge is performed with the same arbitrary constant current each time by the storage battery current constant control means. An uninterruptible power supply characterized by providing a soundness confirmation means for performing soundness diagnosis of a storage battery. 請求項２に記載された無停電電源装置において、前記蓄電池電流一定制御手段により毎回同一の任意の一定電流で蓄電池放電を行わせたときの、蓄電池電圧及び蓄電池内部抵抗の少なくとも一つの経時変化を測定して、蓄電池の健全性診断を行う健全性確認手段を設けたことを特徴とする無停電電源装置。   The uninterruptible power supply device according to claim 2, wherein at least one time-dependent change of the storage battery voltage and the storage battery internal resistance when the storage battery discharge is performed with the same arbitrary constant current each time by the storage battery current constant control means. An uninterruptible power supply comprising a soundness confirmation means for measuring and performing soundness diagnosis of a storage battery. 請求項１乃至３のいずれか１項に記載された無停電電源装置において、予め設定された時間毎に、定期的に任意の一定電流で蓄電池放電を行わせる試験用放電指令手段を設けたことを特徴とする無停電電源装置。   The uninterruptible power supply according to any one of claims 1 to 3, further comprising a test discharge command means that periodically discharges the storage battery at an arbitrary constant current every preset time. An uninterruptible power supply. 請求項１乃至３のいずれか１項に記載された無停電電源装置に対し、遠隔操作によって、前記蓄電池電流一定制御手段により任意の一定電流で蓄電池放電を行わせる遠隔制御装置を設けたことを特徴とする無停電電源装置。   A remote control device is provided for causing the uninterruptible power supply device according to any one of claims 1 to 3 to discharge a storage battery at an arbitrary constant current by the storage battery current constant control means by remote control. Uninterruptible power supply.
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