JP2010166808A - Voltage-drop countermeasure device - Google Patents

Voltage-drop countermeasure device Download PDF

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JP2010166808A
JP2010166808A JP2010031163A JP2010031163A JP2010166808A JP 2010166808 A JP2010166808 A JP 2010166808A JP 2010031163 A JP2010031163 A JP 2010031163A JP 2010031163 A JP2010031163 A JP 2010031163A JP 2010166808 A JP2010166808 A JP 2010166808A
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voltage
power supply
power storage
voltage drop
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JP4896239B2 (en
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Toshio Inoue
利男 井上
Norisuke Inoue
順介 井上
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Chugoku Electric Power Co Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive voltage-drop countermeasure device that can operate all load devices as much as possible by effectively utilizing accumulated electric energy, while optimizing the timing of limiting the load devices to be operated to some devices at an instantaneous power drop or power failure. <P>SOLUTION: In a memory of a control unit of the voltage-drop countermeasure device that feeds the accumulated power to the load devices from the electric storage device when an instantaneous power drop or a power failure with a commercial power supply occurs, a timing TC in which a first attenuation curve CL1 of an output voltage of the electric storage device at electric power supply to all the load devices and a second attenuation curved line CL2 of the output voltage of the electric storage device at electric power supply to a part of the load devices intersect with each other, is set in advance. When an elapsed time from the instantaneous power drop or the power failure reaches the timing TC, objects to be supplied with power from the electric storage device are limited to some of the load devices from all the load devices. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、電圧低下対策装置に関し、詳しくは、大容量の電力を蓄電することなく、電源電圧低下発生時に蓄電電力を有効に供給することができるものに関する。   The present invention relates to a voltage drop countermeasure device, and more particularly to a device capable of effectively supplying stored power when a power supply voltage drop occurs without storing a large amount of power.

各種装置は電源から電力供給を受けて所望の負荷動作を行うようになっており、その負荷装置の機能によっては電圧変動による影響が大きな装置もある。そのような負荷装置では、電源からの供給電力に瞬間的（数百ｍｓｅｃなどの短時間）に電圧が低下（停止を含む）する瞬低や、ある程度の時間中（数分程度の期間）に電力供給が停止する停電が発生すると、その電源電圧の低下により負荷動作が中断するなどの影響が出てしまう。   Various devices receive power supply from a power source and perform a desired load operation. Depending on the function of the load device, there are devices that are greatly affected by voltage fluctuations. In such a load device, a voltage drop (including a stop) instantaneously (a short time such as several hundred msec) or a certain amount of time (a period of several minutes) occurs in the power supplied from the power source. When a power failure occurs to stop power supply, the load operation is interrupted due to a decrease in the power supply voltage.

このことから、そのような負荷装置には、瞬低・停電が発生する前に電気エネルギーを蓄電しておくことにより、一定期間に消費する電力の供給を可能にする無停電電源装置（ＵＰＳ：Uninterruptible Power Supply）を具備させることが行われている。ここで、この無停電電源装置には、負荷装置に供給する電力エネルギーとして、予め供給電源からの電力をバッテリーやコンデンサーに蓄電する方式（例えば、特許文献１、２参照）がある。   Therefore, an uninterruptible power supply (UPS: UPS) that enables electric power to be consumed for a certain period of time by storing electric energy in such a load device before a voltage sag or power failure occurs. Uninterruptible Power Supply). Here, in this uninterruptible power supply, there is a system (for example, refer to Patent Documents 1 and 2) in which power from a power supply is stored in a battery or a capacitor in advance as power energy supplied to a load device.

そして、このような無停電電源装置としては、瞬低などの電源電圧の低下時に必要な電力を信頼性高く供給することができるように、負荷装置を重要な負荷動作を行うものか、一般的な負荷動作を行うものかで区別しておき、電源電圧低下時には、重要でない負荷装置による電力消費を抑えるために、一般的な負荷動作を行う負荷装置を電力供給する対象から外してしまうことを行う場合がある（例えば、特許文献１参照）。   As such an uninterruptible power supply, a load device that performs an important load operation so that the necessary power can be supplied with high reliability when the power supply voltage drops, such as a momentary drop, is generally used. In order to reduce power consumption by unimportant load devices, the load devices that perform general load operations are excluded from the power supply targets when the power supply voltage drops. There are cases (see, for example, Patent Document 1).

特開２００３−２０４６２５号公報JP 2003-204625 A 特開２００３−２７４５５９号公報JP 2003-274559 A

しかしながら、このような従来の無停電電源装置にあっては、例えば、電源から供給される電力の電圧が低下してから、その電力供給が正常に復旧するまでの長期間にわたる電力供給を確保しようとすると、大容量の電気エネルギーを蓄電しなければならず、大型化してしまうとともに、高額な装置になってしまう、という問題があった。   However, in such a conventional uninterruptible power supply, for example, let's ensure long-term power supply from when the voltage of power supplied from the power supply decreases until the power supply is restored to normal. Then, there was a problem that a large amount of electric energy had to be stored, which resulted in an increase in size and an expensive device.

また、電源からの電力を蓄電する手段として、メンテナンス性や長寿命特性などの観点からコンデンサーが多用されてきているが、このコンデンサーは、ある程度の年数が経過したときの経年変化や、設置箇所の周囲温度などの耐環境特性によって、静電容量が低下したり、内部抵抗が増加するなどして、蓄電能力が低下している場合がある。この場合には、最適なタイミングに、稼動させる負荷装置を一部に制限する切換制御を行うことができずに、安全側のタイミングで切り換えるように設定せざるを得なかった。このため、あと少しで電源電圧低下から正常に復旧したにも拘わらずに、本来、停止させる必要のなかった負荷装置を不必要に停止させてしまっていた。   Capacitors are often used as a means to store power from the power supply from the viewpoint of maintainability and long life characteristics, etc. Depending on environmental resistance characteristics such as ambient temperature, the storage capacity may be reduced due to a decrease in capacitance or an increase in internal resistance. In this case, it is impossible to perform switching control that restricts a part of the load devices to be operated at an optimal timing, and it is necessary to set to switch at a safe side timing. For this reason, the load device that originally did not need to be stopped has been stopped unnecessarily, although the power supply voltage has been normally recovered from the power supply voltage shortly afterward.

そこで、本発明は、瞬低・停電発生時に、稼動させる負荷装置を一部に制限するタイミングを最適にすることにより、蓄電する電気エネルギーを有効利用して、全ての負荷装置をできるだけ稼動させることのできる安価な電圧低下対策装置を提供することを目的とする。   In view of this, the present invention optimizes the timing for restricting a part of the load devices to be operated in the event of a voltage sag or power failure, thereby effectively using the stored electrical energy and operating all the load devices as much as possible. An object of the present invention is to provide an inexpensive voltage drop countermeasure device that can be used.

上記課題を解決する電圧低下対策装置の第１の発明は、電源からの電力を負荷装置に供給する供給経路と、電源からの電力を電気エネルギーとして蓄電する蓄電手段と、該蓄電手段内の蓄電エネルギーを供給電力として負荷装置に供給する供給手段と、を備えて、電源から供給される電力の電圧が低下する電源電圧低下期間中に蓄電手段内から電力を供給して負荷装置の稼動を維持する電圧低下対策装置であって、蓄電手段の出力電圧を測定する測定手段と、電源電圧低下が発生した場合に測定手段による測定電圧に基づいて負荷装置への電力供給を制限する電圧低下対策制御を実行する制御手段と、を備えることを特徴とするものである。   A first invention of a voltage drop countermeasure device that solves the above problems includes a supply path for supplying power from a power source to a load device, power storage means for storing power from the power source as electric energy, and power storage in the power storage means. Supply means for supplying energy to the load device as supply power, and maintaining the operation of the load device by supplying power from the power storage means during a power supply voltage drop period during which the voltage of the power supplied from the power supply decreases. A voltage drop countermeasure device that measures the output voltage of the power storage means, and a voltage drop countermeasure control that restricts power supply to the load device based on the measured voltage by the measurement means when a power supply voltage drop occurs And a control means for executing the above.

この発明では、電源電圧低下が発生すると、その発生直後には全ての負荷装置に蓄電手段から電力供給して稼動を維持することができ、この後には、その供給電力の測定電圧に基づいて、複数台の負荷装置のうちの一部（あるいは負荷装置の機能のうちの一部でもよい）に電力供給する対象を制限するなどして、蓄電手段内の蓄電電力の消費を抑えることができる。したがって、例えば、蓄電手段が蓄電電力を供給するに従ってその出力電圧が低下する特性を有する場合に、その出力電圧（測定電圧）に基づいて、電源電圧低下が復旧する前に、蓄電手段内の電力を全て負荷装置に供給してしまうことなく（蓄電手段からの供給電力が負荷装置の駆動電圧以下になってしまうことなく）、その蓄電手段からの電力供給を制限して、電源電圧低下期間中にも稼動させておくべき負荷装置への電力供給を維持することができ、少ない蓄電エネルギーでも、必要な負荷動作を電源電圧低下期間中に継続することができる。   In this invention, when a power supply voltage drop occurs, immediately after the occurrence, power can be supplied from the power storage means to all the load devices to maintain operation, and thereafter, based on the measured voltage of the supplied power, The consumption of the stored power in the power storage means can be suppressed by limiting the power supply target to a part of the plurality of load devices (or a part of the functions of the load device). Therefore, for example, when the power storage means has a characteristic that the output voltage decreases as the stored power is supplied, the power in the power storage means is recovered before the power supply voltage drop is recovered based on the output voltage (measured voltage). Is not supplied to the load device (the power supplied from the power storage means does not become lower than the drive voltage of the load device), and the power supply from the power storage means is limited, during the power supply voltage drop period In addition, the power supply to the load device to be operated can be maintained, and the necessary load operation can be continued during the power supply voltage reduction period even with a small amount of stored energy.

上記課題を解決する電圧低下対策装置の第２の発明は、上記第１の発明の特定事項に加え、前記蓄電手段は蓄電する電力を出力するに従って該出力電圧が減衰する特性を有しており、前記制御手段は、電源電圧低下発生時からの経過時間を計時する計時手段と、電源電圧低下発生時に稼動状態を維持すべき負荷装置の一部を予め設定する装置設定手段と、該装置設定手段内の設定負荷装置を電源電圧低下発生時から稼動させる期間を予め設定する期間設定手段と、装置設定手段内の設定負荷装置のみを蓄電手段からの供給電力で稼動させる場合に当該供給電圧が該稼動に最低限必要な電圧に達するまでの減衰曲線を予め設定する減衰傾向設定手段と、を備えて、電源電圧低下発生時には、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、電源電圧低下発生時からの期間設定手段内の設定期間の終わりに最低必要電圧を一致させた減衰傾向設定手段内の設定減衰曲線に略一致するタイミングに、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することを特徴とするものである。   In addition to the specific matter of the first invention, the second invention of the voltage drop countermeasure device that solves the above problem has a characteristic that the output voltage attenuates as the power storage means outputs the stored power. The control means includes a time measuring means for measuring an elapsed time since the occurrence of a power supply voltage drop, a device setting means for presetting a part of a load device to be maintained in an operating state when the power supply voltage drop occurs, and the device setting A period setting means for presetting a period in which the set load device in the means is operated from the time of occurrence of the power supply voltage drop, and when only the set load device in the device setting means is operated with the power supplied from the power storage means, the supply voltage is An attenuation tendency setting means for presetting an attenuation curve until the voltage required for the operation reaches a minimum, and when the power supply voltage drops, the output power from the power storage means for supplying power to all of the load devices is provided. At a timing when the measured voltage substantially coincides with the set attenuation curve in the attenuation tendency setting means in which the minimum required voltage is made to coincide at the end of the setting period in the period setting means from the occurrence of the power supply voltage drop. The supply is limited only to the set load device in the device setting means.

この発明では、電源電圧低下が発生すると、その発生直後には全ての負荷装置に蓄電手段から電力供給されて稼動が維持されるのと同時に、その発生時から計時する経過時間における設定減衰曲線（設定負荷装置の稼動により蓄電手段内の蓄電電力を設定期間の終わりに使い切る場合の出力電圧曲線）に、その蓄積手段からの供給電力の測定電圧が略一致するタイミングに、一部の設定負荷装置に電力供給する対象を制限して、蓄電手段内の蓄電電力の消費を抑えることができる。したがって、早期に電源電圧低下が正常に復旧したときに備えて全ての負荷装置の稼動をできるだけ維持しつつ、例えば、電源電圧低下が正常に復旧するまでの一般的な設定期間が経過する前に、蓄電手段内の電力を全て負荷装置に供給してしまうことなく、電源電圧低下発生時に稼動状態を維持すべき設定負荷装置への電力供給を維持することができる。   In the present invention, when a power supply voltage drop occurs, immediately after the occurrence, power is supplied from the power storage means to all the load devices and operation is maintained. At the same time, a set decay curve (elapsed time measured from the occurrence time) Some of the set load devices at the timing when the measured voltage of the power supplied from the storage means substantially coincides with the output voltage curve when the stored power in the power storage means is used up at the end of the set period due to the operation of the set load device It is possible to limit the target of supplying power to the battery and suppress the consumption of the stored power in the power storage means. Therefore, while maintaining the operation of all the load devices as much as possible in preparation for when the power supply voltage drop is restored normally at an early stage, for example, before the general setting period until the power supply voltage drop is restored normally Thus, it is possible to maintain the power supply to the set load device that should maintain the operating state when the power supply voltage is reduced without supplying all the power in the power storage means to the load device.

上記課題を解決する電圧低下対策装置の第３の発明は、上記第１または第２の発明の特定事項に加え、前記供給手段に、蓄電手段から受け取る供給電力の電圧を昇圧する昇圧手段を設けたことを特徴とするものである。   According to a third aspect of the voltage drop countermeasure apparatus for solving the above-mentioned problem, in addition to the specific matter of the first or second aspect, the supply means is provided with a boosting means for boosting the voltage of the supplied power received from the power storage means. It is characterized by that.

この発明では、電源電圧低下が発生したときに、蓄電手段内の蓄電電力の電圧を昇圧して負荷装置に電力供給することができ、蓄電手段の出力電圧が負荷装置やインバータ装置などの供給手段自体を稼動させるのに必要な電圧を下回る場合でも、それらの駆動電圧まで昇圧して稼動させることができる。したがって、蓄電手段内から供給可能な電力量を増やすことができ、電源電圧低下発生から全ての負荷装置を稼動させる期間を延長することができる。   In the present invention, when a power supply voltage drop occurs, the voltage of the stored power in the power storage means can be boosted to supply power to the load device, and the output voltage of the power storage means is supplied to the load device, the inverter device, etc. Even when the voltage is lower than the voltage necessary for operating itself, the voltage can be increased to those driving voltages. Therefore, the amount of power that can be supplied from within the power storage means can be increased, and the period during which all the load devices are operated can be extended from the occurrence of a power supply voltage drop.

上記課題を解決する電圧低下対策装置の第４の発明は、上記第１または第２の発明の特定事項に加え、前記供給手段に、蓄電手段から受け取る供給電力の電圧を昇圧する昇圧手段を設けるとともに、前記減衰傾向設定手段には、該昇圧手段を介する蓄電手段からの供給電力で装置設定手段内の設定負荷装置のみを稼動させる場合に該稼動に最低限必要な当該昇圧手段前段の供給電圧を予め設定して、前記制御手段は、電源電圧低下発生時には、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、減衰傾向設定手段内の設定電圧に略一致するタイミングに、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することを特徴とするものである。   According to a fourth aspect of the voltage drop countermeasure apparatus for solving the above-mentioned problem, in addition to the specific matter of the first or second aspect, the supply means is provided with a boosting means for boosting the voltage of the supplied power received from the power storage means. In addition, the attenuation tendency setting means includes a supply voltage of the preceding stage of the boosting means that is minimum required for the operation when only the set load device in the apparatus setting means is operated with the power supplied from the power storage means via the boosting means. When the power supply voltage drop occurs, the control means sets the measured voltage of the output voltage from the power storage means that supplies power to all of the load devices at a timing that substantially matches the set voltage in the attenuation tendency setting means. The power supply from the power storage means is limited only to the set load device in the apparatus setting means.

この発明では、電源電圧低下が発生した後に全ての負荷装置に電力供給する蓄電手段の出力電圧が、昇圧手段を介して昇圧させることにより蓄電手段の供給電力で設定負荷装置を設定期間中に稼動させることのできる最低必要電圧（設定電圧）と比較されて、これらが略一致するタイミングに、蓄電手段から電力供給する対象が全ての負荷装置から一部の設定負荷装置に制限される。したがって、蓄電手段内から供給可能な電力量を増やすとともに、その供給電力量の増加により全ての負荷装置を稼動させる期間をできるだけ延長することができる。   In this invention, the output voltage of the power storage means that supplies power to all the load devices after the power supply voltage drop occurs is boosted via the voltage boosting means so that the set load device is operated during the set period with the power supplied by the power storage means. Compared with the minimum required voltage (set voltage) that can be generated, the power supply from the power storage means is limited from all load devices to some set load devices at a timing when these substantially match. Therefore, the amount of power that can be supplied from within the power storage means can be increased, and the period for operating all the load devices can be extended as much as possible by increasing the amount of supplied power.

上記課題を解決する電圧低下対策装置の第５の発明は、上記第３または第４の発明の特定事項に加え、前記昇圧手段は、制御手段により駆動・停止が制御されて、該制御手段が蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限するタイミングに駆動を開始することを特徴とするものである。   According to a fifth aspect of the voltage drop countermeasure device for solving the above-mentioned problems, in addition to the specific matters of the third or fourth aspect, the boosting means is controlled to be driven / stopped by the control means, and the control means The driving is started at a timing when the power supply from the power storage means is limited to only the set load device in the apparatus setting means.

この発明では、電源電圧低下発生後に全ての負荷装置の稼動を維持した後に、蓄電手段から電力供給する対象を一部の設定負荷装置に制限するタイミングに、昇圧手段が駆動されてその蓄電手段から受け取る供給電力の電圧が昇圧される。したがって、全ての負荷装置を駆動させている大電流の供給電力を不必要に昇圧手段により昇圧させることを回避して、昇圧手段が早期に劣化・損傷してしまうことを防止することができる。   In this invention, after maintaining the operation of all the load devices after the occurrence of the power supply voltage drop, the boosting unit is driven at the timing when the target to be supplied with power from the power storage unit is limited to some set load devices. The received supply voltage is boosted. Therefore, it is possible to avoid unnecessarily boosting the large-current supply power that drives all the load devices by the boosting means, and prevent the boosting means from being deteriorated or damaged at an early stage.

上記課題を解決する電圧低下対策装置の第６の発明は、上記第５の発明の特定事項に加え、前記制御手段は、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、蓄電手段内の蓄電エネルギーを供給電力として負荷装置に供給する供給動作を行うのに必要な下限電圧を超える前に、昇圧手段の駆動を開始することを特徴とするものである。   According to a sixth aspect of the voltage drop countermeasure apparatus for solving the above-mentioned problems, in addition to the specific matter of the fifth aspect, the control means has a measurement voltage of the output voltage from the power storage means for supplying power to all of the load devices. The boosting means is started to drive before the lower limit voltage necessary for performing the supply operation of supplying the stored energy in the power storage means as supply power to the load device.

この発明では、電源電圧低下発生後に全ての負荷装置の稼動を維持した後に、蓄電手段からの供給電力の電圧が負荷装置やインバータ装置などの供給手段自体を稼動させるのに必要な電圧を下回ってしまう前に、昇圧手段を駆動させることができる。したがって、蓄電手段から電力供給する対象を一部の設定負荷装置に制限するタイミングに昇圧手段を駆動させることにより、その蓄電手段内に設定負荷装置を稼動させるのに必要な蓄電電力が残っているのにも拘わらずに、その前に電圧が足らずに停止させてしまうことを防止することができる。   In this invention, after maintaining the operation of all the load devices after the occurrence of the power supply voltage drop, the voltage of the power supplied from the power storage means falls below the voltage required to operate the supply means such as the load device and the inverter device. The boosting means can be driven before it ends. Accordingly, by driving the boosting means at a timing at which the power supply from the power storage means is limited to a part of the set load devices, the stored power necessary for operating the set load device remains in the power storage means. In spite of this, it is possible to prevent the voltage from being stopped before it is insufficient.

上記課題を解決する電圧低下対策装置の第７の発明は、上記第１から第６のいずれかの発明の特定事項に加え、前記制御手段は、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することにより該蓄電手段からの出力電圧が上昇する電圧値を、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧に加算、あるいは、設定減衰曲線から減算することを特徴とするものである。   According to a seventh aspect of the voltage drop countermeasure apparatus for solving the above-mentioned problems, in addition to the specific matter of any one of the first to sixth aspects, the control means supplies power from the power storage means in the apparatus setting means. The voltage value at which the output voltage from the power storage means rises by limiting only to the set load device is added to the measured voltage of the output voltage from the power storage means that supplies power to all of the load devices, or subtracted from the set attenuation curve. It is characterized by doing.

この発明では、電源電圧低下発生後に全ての負荷装置の稼動を維持した後に、蓄電手段から電力供給する対象を一部の設定負荷装置に制限すると、その供給電流の減少に伴って多少の電圧上昇が起こることから、その電圧上昇分を蓄電手段の出力電圧の測定電圧に加算、あるいは、設定負荷装置を設定期間内に稼動させる場合の設定減衰曲線から減算する。したがって、蓄電手段の出力電圧を嵩上げして設定負荷装置のみを稼動させたときの設定減衰曲線に略一致する、あるいは、その設定減衰曲線を少なめに仮想して蓄電手段の出力電圧が略一致するタイミングに、稼動させる対象を全ての負荷装置から設定負荷装置に制限する切換を最適に行うことができ、全ての負荷装置を稼動させる期間をできるだけ延長することができる。   In this invention, after the operation of all the load devices is maintained after the power supply voltage drop occurs, if the target of supplying power from the power storage means is limited to a part of the set load devices, the voltage rises slightly as the supply current decreases. Therefore, the voltage increase is added to the measured voltage of the output voltage of the power storage means, or is subtracted from the set attenuation curve when the set load device is operated within the set period. Therefore, the output voltage of the power storage means is substantially the same as the set attenuation curve when only the set load device is operated by raising the output voltage of the power storage means, or the output voltage of the power storage means is substantially the same with a little set attenuation curve. It is possible to optimally switch the target to be operated from all load devices to the set load device at the timing, and to extend the period for operating all the load devices as much as possible.

上記課題を解決する電圧低下対策装置の時間設定方法の第１の発明は、電源からの電力を負荷装置に供給する供給経路と、電源からの電力を電気エネルギーとして蓄電する蓄電手段と、該蓄電手段内の蓄電エネルギーを供給電力として該負荷装置に供給する供給手段と、電源電圧低下が発生したときからの経過時間を計時する計時手段と、電源電圧低下発生時に稼動状態を維持すべき負荷装置の一部を予め設定する装置設定手段と、電源電圧低下が発生した場合に計時手段の計時する経過時間が予め設定されている時間を経過しても電源電圧低下が継続しているときに蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限する制御手段と、を備えて、電源から供給される電力の電圧が低下する電源電圧低下期間中に蓄電手段内から電力を供給して負荷装置の稼動を維持する電圧低下対策装置の時間設定方法であって、蓄電手段が蓄電する電力を出力するに従って該出力電圧が減衰する特性を有している場合に、まず、電源電圧低下発生時から蓄電手段の蓄電電力を負荷装置の全部に出力して供給する際の該出力電圧の第１減衰曲線と、装置設定手段内の設定負荷装置のみを蓄電手段からの供給電力で稼動させる場合に当該供給電圧が該稼動に最低限必要な電圧に達するまでの第２減衰曲線と、を取得して、電源電圧低下発生時から装置設定手段内の設定負荷装置を稼動させるべき期間が終わるタイミングに第２減衰曲線の最低必要電圧を一致させたときに、該第２減衰曲線に第１減衰曲線が交差するまでの該電源電圧低下発生時からの所要時間を導出し、該所要時間を制御手段が蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限する時間として設定することを特徴としている。   A first invention of a time setting method for a voltage drop countermeasure device that solves the above problems includes a supply path for supplying power from a power source to a load device, power storage means for storing power from the power source as electric energy, and the power storage Supply means for supplying the stored energy in the means as supply power to the load device, time measuring means for measuring the elapsed time from when the power supply voltage drop occurs, and a load device to maintain the operating state when the power supply voltage drop occurs Device setting means for presetting a part of the power supply, and storage when the power supply voltage drop continues even if the elapsed time measured by the clocking means when the power supply voltage drop occurs exceeds a preset time Control means for restricting power supply from the means to only the setting load device in the device setting means, and in the power storage means during the power supply voltage drop period during which the voltage of the power supplied from the power supply is reduced Is a time setting method for a voltage drop countermeasure device that supplies power to maintain the operation of the load device, and when the output voltage attenuates as the power stored in the power storage means is output, First, the first decay curve of the output voltage when supplying and supplying the stored power of the power storage means to all of the load devices from the occurrence of the power supply voltage drop, and only the set load device in the device setting means from the power storage means When operating with supply power, obtain the second decay curve until the supply voltage reaches the minimum voltage required for operation, and operate the set load device in the device setting means from the time of power supply voltage drop occurrence When the minimum required voltage of the second attenuation curve is made coincident with the timing at which the period to be performed ends, a required time from the occurrence of the power supply voltage drop until the first attenuation curve crosses the second attenuation curve is derived. , Time required Control means is characterized by setting as the setting load device time limited to within the device setting means supplying power from the power storage means.

この発明では、電源電圧低下が発生すると、その発生直後には全ての負荷装置に蓄電手段から電力供給されて稼動が維持されるとともに、その発生時からの経過時間が計時され、その経過時間が全ての負荷装置を稼動させた場合の第１減衰曲線と設定負荷装置を設定期間内に稼動させる場合の第２減衰曲線が交差するまでの設定時間に達したときに、蓄電手段から電力供給する対象をその一部の設定負荷装置に制限して、その蓄電手段内の蓄電電力の消費を抑えることができる。したがって、早期に電源電圧低下が正常に復旧したときに備えて全ての負荷装置の稼動をできるだけ維持しつつ、例えば、電源電圧低下が正常に復旧するまでの一般的な設定期間が経過する前に、蓄電手段内の電力を全て負荷装置に供給してしまうことなく、電源電圧低下発生時に稼動状態を維持すべき設定負荷装置への電力供給を維持することができる。   In the present invention, when a power supply voltage drop occurs, power is supplied from the power storage means to all the load devices immediately after the occurrence, and the operation is maintained and the elapsed time from the occurrence is counted, and the elapsed time When the set time until the first attenuation curve when all the load devices are operated and the second attenuation curve when the set load device is operated within the set period has reached a set time, power is supplied from the power storage means. By limiting the target to some of the set load devices, it is possible to suppress consumption of the stored power in the power storage means. Therefore, while maintaining the operation of all the load devices as much as possible in preparation for when the power supply voltage drop is restored normally at an early stage, for example, before the general setting period until the power supply voltage drop is restored normally Thus, it is possible to maintain the power supply to the set load device that should maintain the operating state when the power supply voltage is reduced without supplying all the power in the power storage means to the load device.

上記課題を解決する電圧低下対策装置の時間設定方法の第２の発明は、上記第１の発明の特定事項に加え、前記蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することにより該蓄電手段からの出力電圧が上昇する電圧値を、第１減衰曲線に加算、あるいは、第２減衰曲線から減算して、第１、第２減衰曲線が交差するまでの電源電圧低下発生時からの所要時間を導出することを特徴としている。   The second invention of the time setting method of the voltage drop countermeasure device that solves the above-mentioned problem limits the power supply from the power storage means only to the set load device in the device setting means in addition to the specific matter of the first invention. As a result, the voltage value at which the output voltage from the power storage means increases is added to the first attenuation curve or subtracted from the second attenuation curve, and the power supply voltage decreases until the first and second attenuation curves intersect. It is characterized by deriving the required time from the time of occurrence.

この発明では、電源電圧低下発生後に全ての負荷装置の稼動を維持した後に、蓄電手段から電力供給する対象を一部の設定負荷装置に制限すると、その供給電流の減少に伴って多少の電圧上昇が起こることから、その電圧上昇分を、全ての負荷装置を稼動させる場合の第１減衰曲線に加算、あるいは、設定負荷装置を設定期間内に稼動させる場合の第２減衰曲線から減算する。したがって、電源電圧低下発生時から第１、第２減衰曲線の交差するタイミングまでの期間を延長することができ、蓄電手段から電力供給する対象を全ての負荷装置から設定負荷装置に制限する切換を最適なタイミングにして、全ての負荷装置を稼動させる期間をできるだけ延長することができる。   In this invention, after the operation of all the load devices is maintained after the power supply voltage drop occurs, if the target of supplying power from the power storage means is limited to a part of the set load devices, the voltage rises slightly as the supply current decreases. Therefore, the voltage increase is added to the first attenuation curve when all the load devices are operated, or is subtracted from the second attenuation curve when the set load device is operated within the set period. Therefore, it is possible to extend the period from the occurrence of the power supply voltage drop to the timing at which the first and second attenuation curves intersect, and the switching to limit the power supply target from the power storage means from all the load devices to the set load device. The period for operating all the load devices can be extended as much as possible at the optimum timing.

上記課題を解決する電圧低下対策装置の時間設定方法の第３の発明は、上記第１または第２の発明の特定事項に加え、前記供給手段が蓄電手段から受け取る供給電力の電圧を昇圧する昇圧手段を有する場合には、該昇圧手段を介する蓄電手段からの供給電力で装置設定手段内の設定負荷装置のみを稼動させるときに該稼動に最低限必要な当該昇圧手段前段の供給電圧に、第１減衰曲線が略一致するまでの所要時間を導出し、該所要時間を制御手段が蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限する時間として設定することを特徴としている。   According to a third aspect of the time setting method of the voltage drop countermeasure device for solving the above-described problem, in addition to the specific matter of the first or second aspect, the boosting unit boosts the voltage of the supplied power received from the storage unit by the supplying unit. In the case where only the setting load device in the device setting means is operated with the power supplied from the power storage means via the boosting means, the supply voltage before the boosting means necessary for the operation is It is characterized in that a required time until one attenuation curve substantially coincides is derived, and the required time is set as a time when the control means limits the power supply from the power storage means to only the set load device in the device setting means. .

この発明では、昇圧手段を介して昇圧させることにより蓄電手段の供給電力で設定負荷装置を設定期間中に稼動させることのできる最低必要電圧に、電源電圧低下が発生した後に全ての負荷装置に電力供給する際の第１減衰曲線が略一致するまでの所要時間を設定することにより、この電源電圧低下発生からの経過時間が設定時間に達したときに、蓄電手段から電力供給する対象を一部の設定負荷装置に制限して、その蓄電手段内の蓄電電力の消費を抑えることができる。したがって、蓄電手段内から供給可能な電力量を増やすとともに、その供給電力量の増加により全ての負荷装置を稼動させる期間をできるだけ延長することができる。   In the present invention, power is supplied to all the load devices after the power supply voltage is reduced to the minimum required voltage that allows the set load device to operate during the set period with the power supplied from the power storage device by boosting the voltage via the boost device. By setting the time required until the first attenuation curves at the time of supply substantially coincide with each other, when the elapsed time from the occurrence of the power supply voltage drop reaches the set time, a part of the power supply target from the power storage means It is possible to limit the power consumption of the stored power in the power storage means. Therefore, the amount of power that can be supplied from within the power storage means can be increased, and the period for operating all the load devices can be extended as much as possible by increasing the amount of supplied power.

このように本発明によれば、電源電圧低下の発生直後に全ての負荷装置に蓄電手段から電力供給して稼動を維持しつつ、例えば、その電力供給に従って低下するその蓄電手段の出力電圧を実測して、電源電圧低下から正常に復旧するまで設定負荷装置の稼動を維持不能になるまで蓄電手段内の蓄電電力を消費してしまう前に、その蓄積手段から電力供給する対象をその設定負荷装置に制限することができる。したがって、少ない蓄電電力であっても、全ての負荷装置による電力の浪費を抑えつつできるだけ稼動させることができるとともに、電源電圧低下期間中にも稼動させておくべき負荷装置への電力供給を信頼性高く維持することができる。また、蓄電手段からの供給電力の電圧を昇圧する手段を設けることにより、その蓄電手段内の蓄電電力をより有効に利用することができ、全ての負荷装置を稼動させる期間を延長して電源電圧低下の復旧に備えてできるだけその稼動を維持することができる。   As described above, according to the present invention, immediately after the occurrence of the power supply voltage drop, all the load devices are supplied with power from the power storage means to maintain operation, and for example, the output voltage of the power storage means that decreases according to the power supply is measured. Then, before consuming the stored power in the power storage means until it becomes impossible to maintain the operation of the set load device until the power supply voltage is restored normally, the set load device can supply power from the storage means. Can be limited to. Therefore, even with a small amount of stored power, it can be operated as much as possible while suppressing waste of power by all the load devices, and the power supply to the load devices that should be operated during the power supply voltage drop period is reliable. Can be kept high. In addition, by providing means for boosting the voltage of the power supplied from the power storage means, the power stored in the power storage means can be used more effectively, and the power supply voltage can be extended by extending the period during which all the load devices are operated. Its operation can be maintained as much as possible in preparation for the recovery of the decline.

本発明に係る電圧低下対策装置の時間設定方法の第１実施形態を示す図であり、その電圧低下対策装置の概略全体構成を示すブロック図である。It is a figure which shows 1st Embodiment of the time setting method of the voltage drop countermeasure apparatus which concerns on this invention, and is a block diagram which shows the schematic whole structure of the voltage drop countermeasure apparatus. その電圧低下対策装置の蓄電装置の特性を示すグラフである。It is a graph which shows the characteristic of the electrical storage apparatus of the voltage reduction countermeasure apparatus. その制御動作を説明するフローチャートである。It is a flowchart explaining the control operation. 本発明に係る電圧低下対策装置の第１実施形態を示す図であり、その概略全体構成を示すブロック図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the voltage drop countermeasure device which concerns on this invention, and is a block diagram which shows the schematic whole structure. その制御動作を説明するフローチャートである。It is a flowchart explaining the control operation. 本発明に係る電圧低下対策装置の時間設定方法の第２実施形態を示す図であり、その電圧低下対策装置の概略全体構成を示すブロック図である。It is a figure which shows 2nd Embodiment of the time setting method of the voltage drop countermeasure apparatus which concerns on this invention, and is a block diagram which shows the schematic whole structure of the voltage drop countermeasure apparatus. その電圧低下対策装置の蓄電装置の特性を示すグラフである。It is a graph which shows the characteristic of the electrical storage apparatus of the voltage reduction countermeasure apparatus. 本発明に係る電圧低下対策装置の第２実施形態を示す図であり、その概略全体構成を示すブロック図である。It is a figure which shows 2nd Embodiment of the voltage drop countermeasure device which concerns on this invention, and is a block diagram which shows the schematic whole structure.

以下、本発明の実施形態を図面に基づいて説明する。図１〜図３は本発明に係る電圧低下対策装置の時間設定方法の第１実施形態を示す図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-3 is a figure which shows 1st Embodiment of the time setting method of the voltage drop countermeasure device which concerns on this invention.

まず、電圧低下対策装置の構成を説明する。図１において、電圧低下対策装置１０は、商用電源Ｐに接続する接続部１１と、負荷装置１０１、１０２を個別に接続する接続部１２と、接続部１１に接続された商用電源Ｐから接続部１２に接続された負荷装置１０１、１０２に供給する電力の経路となる電源線（供給経路）Ｌｐと、商用電源Ｐからの交流電力を直流電力に整流する整流器１３と、この整流器１３からの直流電力を蓄電する蓄電装置１４と、この蓄電装置１４からの直流電力を交流電力に変換するインバータ１５と、このインバータ１５からの交流電力を負荷装置１０１、１０２に電力供給可能に電源線Ｌｐに入力する変圧器１６と、インバータ１５の動作の調整・制御を行う制御部（制御手段）１７と、を備えている。なお、商用電源Ｐや負荷装置１０１、１０２は、例えば、コンセントとプラグ形式の接続部１１、１２により電源線Ｌｐに接続するが、これに限らずに、電圧低下対策装置１０が分電盤などに設置される場合などには、電気的な導通を確保する、所謂、丸端子などの接続端子により接続してもよい。   First, the configuration of the voltage drop countermeasure device will be described. In FIG. 1, the voltage drop countermeasure device 10 includes a connection unit 11 connected to the commercial power source P, a connection unit 12 that individually connects the load devices 101 and 102, and a connection unit from the commercial power source P connected to the connection unit 11. 12, a power line (supply path) Lp serving as a path of power supplied to the load devices 101 and 102 connected to the rectifier 13, a rectifier 13 that rectifies AC power from the commercial power supply P into DC power, and a DC from the rectifier 13 A power storage device 14 that stores power, an inverter 15 that converts DC power from the power storage device 14 into AC power, and AC power from the inverter 15 is input to the power supply line Lp so that power can be supplied to the load devices 101 and 102. And a control unit (control means) 17 that adjusts / controls the operation of the inverter 15. The commercial power supply P and the load devices 101 and 102 are connected to the power supply line Lp by, for example, outlets and plug-type connection portions 11 and 12, but the voltage drop countermeasure device 10 is not limited to this, and the distribution board or the like. In the case of being installed in a cable, connection may be made by a connection terminal such as a so-called round terminal that ensures electrical continuity.

蓄電装置１４は、整流器１３により整流された直流電力を予め蓄電しておく、コンデンサーにより構築された蓄電手段であり、商用電源Ｐからの交流電力をインバータ１５を介して負荷装置１０１、１０２に供給可能な電気エネルギーとして蓄電する。   The power storage device 14 is a power storage unit constructed by a capacitor that stores the DC power rectified by the rectifier 13 in advance, and supplies AC power from the commercial power source P to the load devices 101 and 102 via the inverter 15. It stores electricity as possible electrical energy.

制御部１７は、不図示のメモリ内に格納する制御プログラムに従って各種制御動作を実行するＣＰＵ（中央処理装置）により構築されており、商用電源Ｐからの商用電力を検出する検出器１８の検出情報や、所定のタイミングからの経過時間を計時するタイマ（計時手段）１９の計時情報に基づいて、蓄電装置１４内の直流電力をインバータ１５により交流電力に変換して変圧器１６を介して電源線Ｌｐに入力するなどの制御動作を実行する。すなわち、インバータ１５と変圧器１６が供給手段を構成している。   The control unit 17 is constructed by a CPU (central processing unit) that executes various control operations in accordance with a control program stored in a memory (not shown), and detection information of a detector 18 that detects commercial power from the commercial power source P. Or, based on the timekeeping information of a timer (timer means) 19 that measures the elapsed time from a predetermined timing, the inverter 15 converts the DC power in the power storage device 14 into AC power, and the power line via the transformer 16 A control operation such as input to Lp is executed. That is, the inverter 15 and the transformer 16 constitute supply means.

例えば、この制御部１７は、検出器１８の検出情報に基づいて、商用電源Ｐの供給電力に瞬間的に電圧低下する瞬低の発生を検知したときや、商用電源Ｐの電力供給が一定期間停止する（瞬間的に停止する瞬停を含む）停電の発生を検知したときには、所望の電力を負荷装置１０１、１０２に供給する電源電圧低下対策制御を実行するように設計されており、このときには（特に停電時に）、蓄電装置１４内の直流電力を変換した交流電力が商用電源Ｐ側に向かって逆流しないように、スイッチ２０を切り換えて負荷装置１０１、１０２を商用電源Ｐから切り離す。   For example, the control unit 17 detects, based on the detection information of the detector 18, the occurrence of a momentary voltage drop that instantaneously drops in the supply power of the commercial power supply P, or the power supply of the commercial power supply P is for a certain period. It is designed to execute power supply voltage drop countermeasure control for supplying desired power to the load devices 101 and 102 when it detects the occurrence of a power failure that stops (including momentary power outage). The switch 20 is switched to disconnect the load devices 101 and 102 from the commercial power supply P so that the alternating current power converted from the direct current power in the power storage device 14 does not flow backward toward the commercial power supply P (particularly during a power failure).

具体的には、制御部１７は、前記メモリ内の設定に従って、検出器１８が検出する瞬低・停電の発生時から蓄電装置１４内の蓄電電力を負荷装置１０１、１０２の全てにインバータや変圧器１６を介して供給する電源電圧低下対策制御を開始した後に、その蓄電装置１４の蓄電能力を考慮した切換タイミングに電力供給する対象を一部の装置に制限するように設計されており、この制御部１７のメモリ内には、商用電源Ｐの瞬低・停電の発生時にも正常な稼動状態を維持すべき負荷装置１０１と、その瞬低・停電の発生時に蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てからその負荷装置１０１に切り換えるタイミング（電源電圧低下の発生からの経過時間）が予め設定されている。すなわち、制御部１７のメモリが装置設定手段を構成する。   Specifically, according to the setting in the memory, the control unit 17 converts the stored power in the power storage device 14 from all the load devices 101 and 102 to inverters and transformers from the time of the instantaneous voltage drop / power failure detected by the detector 18. After the power supply voltage drop countermeasure control to be supplied through the battery 16 is started, the power supply target is limited to a part of the devices at the switching timing in consideration of the storage capacity of the storage device 14. In the memory of the control unit 17, a load device 101 that should maintain a normal operating state even when a commercial power supply P has a voltage sag or power failure, and an object to be supplied with power from the power storage device 14 at the time of the power sag or power failure Is switched in advance from all of the load devices 101 and 102 to the load device 101 (elapsed time since the occurrence of the power supply voltage drop). That is, the memory of the control unit 17 constitutes a device setting unit.

詳細には、蓄電装置１４は、コンデンサーにより構築されていることから、蓄電電力を出力するに従ってその出力電圧が減衰する特性を有しているとともに、このコンデンサーは、経年変化や環境特性によって静電容量の低下や内部抵抗の増加などが生じるので、制御部１７のメモリ内には、設計時に想定した最長使用期間の経過時や設置環境内での周囲温度に応じて最も低下する蓄電装置１４の蓄電容量を考慮して、瞬低・停電の発生時に電力供給する対象として負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する切換タイミングを設定する必要がある。   Specifically, since the power storage device 14 is constructed by a capacitor, the output voltage attenuates as the stored power is output, and the capacitor is electrostatically affected by aging and environmental characteristics. Since a decrease in capacity, an increase in internal resistance, and the like occur, the memory of the power storage device 14 that decreases most depending on the ambient temperature in the installation environment or in the memory of the control unit 17 when the longest usage period assumed at the time of design has elapsed. In consideration of the storage capacity, it is necessary to set a switching timing for restricting all of the load devices 101 and 102 to a part of the load devices 101 as an object to be supplied with electric power when an instantaneous drop or power failure occurs.

この蓄電装置１４の出力電圧は、図２に一点鎖線で示すように、負荷装置１０１、１０２の全てに蓄電電力を供給する際には、最大充電電圧ＶＵから蓄電装置１４を構成するコンデンサの内部抵抗Ｒに電流Ｉが流れることによる電圧降下（所謂、ＩＲドロップ）の後に、その負荷装置１０１、１０２への電力供給量に応じて減衰（電圧降下）するＶ−Ｔ曲線の第１減衰曲線ＣＬ１を辿って低下する。また、一部の負荷装置１０１に蓄電電力を供給する際には、図２に二点鎖線で示すように、同様に、最大充電電圧ＶＵからの電圧降下の後に、その負荷装置１０１への電力供給量に応じて減衰する第２減衰曲線ＣＬ２を辿って低下する。さらに、この蓄電装置１４の出力電圧は、図２に示すように、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てからその一部の負荷装置１０１に切り換えると、負荷装置１０２に供給していた電力に相当するコンデンサ電流ｉが減少することによる電圧上昇ｉＲをした後に、第１減衰曲線ＣＬ１から第２減衰曲線ＣＬ２を辿るように変化する。   As shown by a one-dot chain line in FIG. 2, the output voltage of the power storage device 14 is generated when the stored power is supplied to all of the load devices 101 and 102, and the inside of the capacitor constituting the power storage device 14 from the maximum charging voltage VU. After a voltage drop (so-called IR drop) due to the current I flowing through the resistor R, the first attenuation curve CL1 of the VT curve attenuates (voltage drop) according to the amount of power supplied to the load devices 101 and 102. Traces down. In addition, when the stored power is supplied to some of the load devices 101, similarly, as indicated by a two-dot chain line in FIG. 2, after the voltage drop from the maximum charging voltage VU, It decreases following the second attenuation curve CL2 that attenuates according to the supply amount. Further, as shown in FIG. 2, the output voltage of the power storage device 14 is obtained when the target to be supplied with power from the power storage device 14 is switched from all of the load devices 101 and 102 to some of the load devices 101. After the voltage increase iR due to the decrease in the capacitor current i corresponding to the supplied power, the voltage changes so as to follow the second attenuation curve CL2 from the first attenuation curve CL1.

このことから、次のようにして、制御部１７のメモリ内に、瞬低・停電の発生時に電力供給する対象として負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する切換タイミングＴＣを設定する。言い換えると、次に、電圧低下対策装置１０の時間設定方法を説明する。   From this, the switching timing TC for restricting all of the load devices 101 and 102 to a part of the load devices 101 as an object to be supplied with power in the event of a voltage sag or power failure in the memory of the control unit 17 as follows. Set. In other words, the time setting method of the voltage drop countermeasure device 10 will be described next.

この電圧低下対策装置１０の蓄電装置１４は、このような蓄電電力の出力（供給）特性を有することから、まずは、負荷装置１０１、１０２の全てに蓄電装置１４内の蓄電電力を供給する際の第１減衰曲線ＣＬ１、および、一部の負荷装置１０１に蓄電装置１４内の蓄電電力を供給する際の第２減衰曲線ＣＬ２を取得・準備して、商用電源Ｐが瞬低・停電から復旧するのに一般的に掛かる期間ＴＳの終わりに、その一部の負荷装置１０１を稼動させるのに必要な最低必要電圧ＶＬに一致するように調整した第２減衰曲線ＣＬ２と、その瞬低・停電の発生時からの第１減衰曲線ＣＬ１とが交差する仮のタイミング（電源電圧の低下発生からの所要時間）ｔｃを求める。   Since the power storage device 14 of the voltage drop countermeasure device 10 has such an output (supply) characteristic of stored power, first, when the stored power in the power storage device 14 is supplied to all of the load devices 101 and 102. The first decay curve CL1 and the second decay curve CL2 when supplying the stored power in the power storage device 14 to some of the load devices 101 are obtained and prepared, and the commercial power supply P recovers from the instantaneous power failure / power failure. The second decay curve CL2 adjusted to coincide with the minimum necessary voltage VL required to operate some of the load devices 101 at the end of the period TS generally taken to A provisional timing (a required time from the occurrence of a drop in the power supply voltage) tc at which the first decay curve CL1 from the occurrence of the crossing is obtained.

この仮の交差タイミングｔｃを切換タイミングＴＣとして、制御部１７のメモリ内に設定してもよいが、上述するように、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから負荷装置１０１に制限することによる電圧上昇ｉＲがあるので、第１減衰曲線ＣＬ１にその電圧上昇ｉＲを予め加算した値を用いて第２減衰曲線ＣＬ２との交差タイミング（逆に、第２減衰曲線ＣＬ２からその電圧上昇ｉＲを予め減算した値を用いたときの第１減衰曲線ＣＬ１との交差タイミングでもよい）ＴＣを導出する。この後に、その交差タイミングＴＣを、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切り換えて制限する制限タイミングＴＣとして設定する。なお、この制限タイミングＴＣにおける蓄電装置１４の供給電力は、出力電圧ＶＣから電圧上昇ｉＲしてインバータ１５に入力（供給）される。   Although this temporary intersection timing tc may be set in the memory of the control unit 17 as the switching timing TC, as described above, the power supply target from all of the load devices 101 and 102 is the load device from the power storage device 14. Since there is a voltage increase iR by limiting to 101, the timing of crossing with the second attenuation curve CL2 using a value obtained by adding the voltage increase iR in advance to the first attenuation curve CL1 (conversely from the second attenuation curve CL2). (It may be the timing of intersection with the first attenuation curve CL1 when a value obtained by subtracting the voltage increase iR in advance is used) TC is derived. Thereafter, the intersection timing TC is set as a limit timing TC for switching the power supply target from the power storage device 14 from all of the load devices 101 and 102 to some of the load devices 101. Note that the power supplied to the power storage device 14 at the limit timing TC is input (supplied) to the inverter 15 after increasing the voltage iR from the output voltage VC.

そして、制御部１７は、図３のフローチャートに示すように、検出器１８の検出情報から商用電源Ｐの供給電力に瞬低・停電が発生したことを検知すると（ステップＳ１１）、タイマ１９の駆動を開始して瞬低・停電発生時からの経過時間を計時するとともに、スイッチ２０を切り換えた後に（商用電源Ｐを切り離した後に）、蓄電装置１４内の直流電力をインバータ１５により交流電力に変換して変圧器１６を介して電源線Ｌｐに入力することより、負荷装置１０１、１０２の全てに定常動作するのに必要な電圧を補償するように電力供給を開始する（ステップＳ２１）。   Then, as shown in the flowchart of FIG. 3, when the control unit 17 detects from the detection information of the detector 18 that an instantaneous drop or power failure has occurred in the supply power of the commercial power supply P (step S <b> 11), the timer 19 is driven. After switching the switch 20 (after disconnecting the commercial power supply P), the DC power in the power storage device 14 is converted into AC power by the inverter 15. Then, by inputting to the power supply line Lp via the transformer 16, power supply is started so as to compensate for the voltage necessary for steady operation of all the load devices 101 and 102 (step S21).

この後には、商用電源Ｐからの電力供給が正常に復旧したか否かを検出器１８による検出情報から、予め設定されている制限タイミングＴＣが経過するまで繰り返し確認し、瞬低・停電からの復旧が確認された場合（ステップＳ３１、Ｓ４１）には、ステップＳ１１に戻って、インバータ１５や変圧器１６を介する蓄電装置１４内からの電力供給を停止するのと同時に、スイッチ２０を切り換えて負荷装置１０１、１０２を商用電源Ｐ側に接続することにより、その商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   After this, whether or not the power supply from the commercial power supply P has been restored normally is repeatedly confirmed from detection information by the detector 18 until a preset limit timing TC elapses. When restoration is confirmed (steps S31 and S41), the process returns to step S11, and the power supply from the power storage device 14 via the inverter 15 and the transformer 16 is stopped, and at the same time, the switch 20 is switched to switch the load. By connecting the devices 101 and 102 to the commercial power supply P side, the power supply at the voltage necessary for the steady operation of the load devices 101 and 102 is resumed from the commercial power supply P, and an instantaneous power failure / power failure detection and power storage device 14 continues to be stored.

これにより、瞬低・停電発生から制限タイミングＴＣが経過する前に商用電源Ｐからの電力供給が正常に復旧した場合にまで、蓄電装置１４から電力供給する対象が制限されてしまうことを回避することができる。言い換えると、蓄電装置１４に蓄電されている一部の電気エネルギーで賄える場合には、負荷装置１０１、１０２の定常動作を停止させてしまうことなく、その定常動作を維持することができる。   Thereby, it is avoided that the power supply target from the power storage device 14 is restricted until the power supply from the commercial power supply P is normally restored before the restriction timing TC elapses from the occurrence of the instantaneous power failure / power failure. be able to. In other words, when a part of the electrical energy stored in the power storage device 14 can be covered, the steady operation of the load devices 101 and 102 can be maintained without stopping the steady operation.

一方、商用電源Ｐが瞬低・停電から復旧することなく、その制限タイミングＴＣに達した場合（ステップＳ３１、Ｓ４１）には、蓄電装置１４から電力供給する対象を一部の負荷装置１０１に制限して、停止させても問題のない負荷装置１０２の稼動を停止することにより、蓄電装置１４内の蓄電電力の消費を負荷装置１０１のみに抑えて、商用電源Ｐの瞬低・停電期間中の負荷装置１０１の稼動を維持する（ステップＳ５１）。   On the other hand, when the commercial power supply P reaches its limit timing TC without recovering from an instantaneous power failure or power failure (steps S31 and S41), the power supply target from the power storage device 14 is limited to some load devices 101. Then, by stopping the operation of the load device 102 that does not cause a problem even if it is stopped, the consumption of the stored power in the power storage device 14 is suppressed only to the load device 101, so that the commercial power supply P can be stopped during an instantaneous power failure or power outage period. The operation of the load device 101 is maintained (step S51).

これにより、商用電源Ｐが瞬低・停電から復旧するまで一部の負荷装置１０１を稼動させるのに最低限必要な電力を蓄電装置１４内に残すように、適正に設定されている制限タイミングＴＣまで負荷装置１０１、１０２の全てを稼動させることができ、瞬低・停電発生からその制限タイミングＴＣが経過した場合に、蓄電装置１４からの電力供給をその一部の負荷装置１０１に制限することにより、瞬低・停電中でも（その復旧時期ＴＳまで）定常動作を維持すべき負荷装置１０１の稼動を確保することができる。このときの制限タイミングＴＣは、電力供給を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限することによる蓄電装置１４の出力電圧の上昇分ｉＲまでも考慮して設定されているので、蓄電装置１４から負荷装置１０１、１０２の全てに電力供給する期間をできるだけ延長して稼動させることができる。   As a result, the limit timing TC set appropriately so as to leave the minimum power necessary for operating some of the load devices 101 until the commercial power supply P recovers from the instantaneous power failure / power failure. All of the load devices 101 and 102 can be operated, and when the limit timing TC has elapsed since the occurrence of the instantaneous voltage drop or power failure, the power supply from the power storage device 14 is limited to a part of the load devices 101. Thus, it is possible to ensure the operation of the load device 101 that should maintain a steady operation even during a momentary voltage drop or power failure (until the restoration time TS). The restriction timing TC at this time is set in consideration of the increase iR of the output voltage of the power storage device 14 by restricting the power supply from all of the load devices 101 and 102 to some of the load devices 101. The period during which power is supplied from the power storage device 14 to all of the load devices 101 and 102 can be extended and operated.

この後には、商用電源Ｐが瞬低・停電から復旧したことを検出器１８による検出情報から確認したときに（ステップＳ６１）、ステップＳ１１に戻って、インバータ１５や変圧器１６を介する蓄電装置１４内からの電力供給を停止するのと同時に、スイッチ２０を切り換えて負荷装置１０１、１０２を商用電源Ｐ側に接続して、その商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Thereafter, when it is confirmed from the detection information by the detector 18 that the commercial power source P has recovered from the instantaneous power failure / power failure (step S61), the process returns to step S11, and the power storage device 14 via the inverter 15 and the transformer 16 is returned. At the same time as stopping the power supply from the inside, the switch 20 is switched to connect the load devices 101 and 102 to the commercial power supply P side, and the voltage required for steady operation of the load devices 101 and 102 from the commercial power supply P The power supply is resumed, and the detection of the instantaneous voltage drop / power outage and the power storage to the power storage device 14 are continued.

このように本実施形態においては、瞬低・停電が制限タイミングＴＣ以上継続する場合に、負荷装置１０１、１０２の全てに蓄電装置１４内の蓄電電力を供給する状態から、一部の負荷装置１０１のみに電力供給を制限して消費する電力量をできるだけ抑えることができる。したがって、蓄電装置１４の蓄電容量を小さく設定した安価の電圧低下対策装置１０でも、瞬低・停電の発生後には、早期の復旧に備えて負荷装置１０１、１０２の全ての稼動をできるだけ維持した後に（蓄電装置１４の蓄電電力を使い切る前に）、稼動させておくべき一部の負荷装置１０１に絞って瞬低・停電から復旧するまで電力供給を維持することができる。   As described above, in the present embodiment, when the voltage sag / power failure continues for the limit timing TC or more, a part of the load devices 101 is changed from a state in which the stored power in the power storage device 14 is supplied to all of the load devices 101 and 102. The amount of power consumed can be suppressed as much as possible by limiting the power supply only to the above. Therefore, even with an inexpensive voltage drop countermeasure device 10 in which the power storage capacity of the power storage device 14 is set small, after the occurrence of a voltage sag / power failure, after all operation of the load devices 101 and 102 is maintained as much as possible in preparation for early recovery. The power supply can be maintained until recovery from the instantaneous power failure / power failure by focusing on a part of the load devices 101 to be operated (before the power stored in the power storage device 14 is used up).

ここで、本実施形態の他の態様としては、本実施形態では、蓄電装置１４がコンデンサーにより構築されているために、最長使用期間の経過や設置環境内での周囲温度に応じて最も低下した場合の蓄電容量を考慮して、瞬低・停電の発生時から蓄電装置１４の蓄電電力を供給する対象として負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する制限タイミングＴＣをメモリ内に設定する一例を説明するが、これに限るものではなく、例えば、周囲温度の異なる設置環境毎に使用開始からの経過時間に応じた制限タイミングをテーブル内に予め格納準備しておき、使用期間の経過や設置環境に応じて、その制限タイミングを選択するようにしても良い。この場合には、使用期間の経過や周囲温度などの環境に応じて蓄電装置１４の蓄電容量の低下率が大きいときに、その蓄電電力を有効に利用することができる。   Here, as another aspect of the present embodiment, in the present embodiment, since the power storage device 14 is constructed by a capacitor, it has decreased most according to the passage of the longest use period and the ambient temperature in the installation environment. In consideration of the storage capacity in the case, the memory is used for limiting timing TC for limiting all of the load devices 101 and 102 to a part of the load devices 101 as a target to supply the stored power of the power storage device 14 from the time of the instantaneous power failure or power failure. However, the present invention is not limited to this. For example, the limit timing corresponding to the elapsed time from the start of use is prepared in advance in the table for each installation environment having different ambient temperatures, and used. The restriction timing may be selected according to the passage of the period or the installation environment. In this case, when the rate of decrease of the storage capacity of the power storage device 14 is large according to the environment such as the passage of the usage period and the ambient temperature, the stored power can be used effectively.

次に、図４および図５は本発明に係る電圧低下対策装置の第１実施形態を示す図である。ここで、本実施形態の電圧低下対策装置は、上述実施形態における電圧低下対策装置と略同様に構成されているので、同様の構成には同一の符号を付してその特徴部分を説明する（以下で説明する他の実施形態においても同様）。   Next, FIGS. 4 and 5 are views showing a first embodiment of the voltage drop countermeasure device according to the present invention. Here, the voltage drop countermeasure device of the present embodiment is configured in substantially the same manner as the voltage drop countermeasure device in the above-described embodiment, and therefore, the same components are denoted by the same reference numerals and their characteristic portions will be described ( The same applies to other embodiments described below).

図４において、電圧低下対策装置３０は、接続部１１、１２と、電源線Ｌｐと、整流器１３と、蓄電装置１４と、インバータ１５と、変圧器１６と、制御部１７と、検出器１８と、タイマ１９と、に加えて、その蓄電装置１４から出力されるインバータ１５への供給電力の電圧を測定する電圧計（測定手段）３１が配設されており、制御部１７は、不図示のメモリ内に格納する制御プログラムに従って検出器１８の検出情報などに基づいて開始した電源電圧低下対策制御において、その電圧計３１による測定電圧に応じて、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する。   In FIG. 4, the voltage drop countermeasure device 30 includes connecting portions 11 and 12, a power line Lp, a rectifier 13, a power storage device 14, an inverter 15, a transformer 16, a control unit 17, and a detector 18. In addition to the timer 19, a voltmeter (measuring means) 31 that measures the voltage of the power supplied to the inverter 15 output from the power storage device 14 is provided, and the control unit 17 is not shown. In the power supply voltage drop countermeasure control started based on the detection information of the detector 18 in accordance with the control program stored in the memory, the load device 101 determines the power supply target from the power storage device 14 according to the voltage measured by the voltmeter 31. , 102 to a part of the load device 101.

すなわち、制御部１７は、上述実施形態においては、瞬低・停電の発生時からの経過時間に基づいて電源電圧低下対策制御を行っていたのに代えて、蓄電装置１４の出力電圧を実測して、その蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する切換を行うように設計されており、そのメモリ内には、上述実施形態では予め導出した制限タイミングＴＣを設定していたのに代えて、実測する蓄電装置１４の出力電圧ＶＣから制限タイミングＴＣを適宜決定する。   That is, in the above-described embodiment, the control unit 17 actually measures the output voltage of the power storage device 14 instead of performing power supply voltage reduction countermeasure control based on the elapsed time from the occurrence of the instantaneous voltage drop or power failure. The power supply device 14 is designed to perform switching to limit the target of power supply from all of the load devices 101 and 102 to a part of the load devices 101. Instead of setting the derived limit timing TC, the limit timing TC is appropriately determined from the output voltage VC of the power storage device 14 that is actually measured.

詳細には、蓄電装置１４の出力電圧は、図２に示すように、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てからその一部の負荷装置１０１に切り換える際には、負荷装置１０２の電力供給の遮断による電圧上昇ｉＲの後に、その一部の負荷装置１０１への電力供給量に応じて減衰する第２減衰曲線ＣＬ２を辿ることから、制御部１７のメモリ内には、商用電源Ｐが瞬低・停電から復旧するまでに必要な期間の終わりの時期ＴＳに、一部の負荷装置１０１の稼動に必要な最低必要電圧ＶＬを一致させるように調整した第２減衰曲線ＣＬ２より、負荷装置１０２への電力供給の遮断による電圧上昇ｉＲを予め減算した設定減衰曲線を設定しておく。そして、制御部１７は、メモリ内のその設定減衰曲線に蓄電装置１４の出力電圧が乗るように、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切換・制限する。すなわち、制御部１７のメモリが期間設定手段および減衰傾向設定手段を構成する。   Specifically, as shown in FIG. 2, the output voltage of the power storage device 14 is obtained by changing the load supply target from all of the load devices 101 and 102 to a part of the load devices 101. After the voltage increase iR due to the interruption of the power supply of the device 102, the second attenuation curve CL <b> 2 that attenuates according to the amount of power supplied to some of the load devices 101 is traced. The second attenuation curve CL2 adjusted so that the minimum necessary voltage VL necessary for the operation of some of the load devices 101 coincides with the timing TS at the end of the period necessary until the commercial power supply P recovers from the instantaneous power failure / power failure. Accordingly, a set attenuation curve is set by previously subtracting the voltage increase iR due to the interruption of the power supply to the load device 102. Then, the control unit 17 changes the power supply target from the power storage device 14 from all of the load devices 101 and 102 to a part of the load devices 101 so that the output voltage of the power storage device 14 is on the set attenuation curve in the memory. Switch / restrict. That is, the memory of the control unit 17 constitutes a period setting unit and an attenuation tendency setting unit.

具体的には、制御部１７は、図５のフローチャートに示すように、商用電源Ｐの供給電力に瞬低・停電が発生すると、タイマ１９が瞬低・停電発生からの経過時間を計時するとともに、定常動作するのに必要な電圧で蓄電装置１４から負荷装置１０１、１０２の全てに電力供給するのと同時に、その蓄電装置１４の出力電圧を測定する電源電圧低下対策制御動作を開始する（ステップＳ１１、Ｓ２１）。   Specifically, as shown in the flowchart of FIG. 5, when an instantaneous drop or power failure occurs in the supply power of the commercial power supply P, the control unit 17 counts the elapsed time from the occurrence of the instantaneous voltage drop or power failure. At the same time as supplying power from the power storage device 14 to all of the load devices 101 and 102 with a voltage necessary for steady operation, a power supply voltage drop countermeasure control operation for measuring the output voltage of the power storage device 14 is started (step S11, S21).

この後には、商用電源Ｐからの電力供給が正常に復旧したか否かを検出器１８による検出情報から繰り返し確認するとともに、その都度、蓄電装置１４の出力電圧がタイマ１９による経過時刻におけるメモリ内の設定減衰曲線に一致したか否かを電圧計３１による測定情報から繰り返し確認し（ステップＳ３１、Ｓ４２）、その設定減衰曲線に一致する出力電圧ＶＣになるまで電圧降下（減衰）する前に、商用電源Ｐの瞬低・停電からの復旧が確認された場合には、ステップＳ１１に戻って、蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Thereafter, whether or not the power supply from the commercial power supply P has been restored normally is repeatedly confirmed from the detection information by the detector 18, and each time the output voltage of the power storage device 14 is stored in the memory at the time elapsed by the timer 19. It is confirmed repeatedly from the measurement information by the voltmeter 31 (steps S31 and S42), and before the voltage drop (attenuates) until the output voltage VC matches the set attenuation curve. When it is confirmed that the commercial power supply P has recovered from an instantaneous drop or a power failure, the process returns to step S11 to stop the power supply from the power storage device 14 and simultaneously from the commercial power supply P to the load devices 101 and 102. The power supply at the voltage necessary for the steady operation is restarted, and the instantaneous power failure / power failure detection and the power storage in the power storage device 14 are continued.

一方、商用電源Ｐが瞬低・停電から復旧する前に、蓄電装置１４が出力電圧ＶＣまで減衰した場合には、その蓄電装置１４から電力供給する対象を一部の負荷装置１０１に制限して、停止しても問題のない負荷装置１０２の稼動を停止することにより、蓄電装置１４内の蓄電電力の消費を負荷装置１０１のみに抑えて、商用電源Ｐの瞬低・停電期間中の負荷装置１０１の稼動を維持する（ステップＳ５１）。   On the other hand, if the power storage device 14 is attenuated to the output voltage VC before the commercial power supply P recovers from the instantaneous power failure or power failure, the power supply target from the power storage device 14 is limited to some load devices 101. By stopping the operation of the load device 102 that does not cause a problem even if it is stopped, the consumption of the stored power in the power storage device 14 is suppressed only to the load device 101, and the load device during the instantaneous power failure / power failure period of the commercial power supply P 101 is maintained (step S51).

これにより、蓄電装置１４内に残る蓄電電力を出力電圧により実測して、商用電源Ｐが瞬低・停電から復旧するまで一部の負荷装置１０１を稼動させるのに最低限必要な電力を蓄電装置１４内に残すことのできる制限タイミングＴＣのぎりぎりまで、負荷装置１０１、１０２の全てを稼動させることができ、その蓄電装置１４の蓄電電力が限界に達したときに、蓄電装置１４からの電力供給を一部の負荷装置１０１に制限することにより、瞬低・停電時にも定常動作を維持すべき負荷装置１０１の稼動を確保することができる。このときの制限タイミングＴＣは、蓄電装置１４からの電力供給を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限することによる電圧上昇分を考慮して設定したメモリ内の設定減衰曲線とその出力電圧とを比較するので、蓄電装置１４から負荷装置１０１、１０２の全てに電力供給する期間をできるだけ延長して稼動させることができる。   As a result, the stored power remaining in the power storage device 14 is actually measured with the output voltage, and the minimum power required to operate some of the load devices 101 until the commercial power supply P recovers from the instantaneous power failure / power failure. All of the load devices 101 and 102 can be operated until the limit timing TC that can remain in the power supply 14, and when the stored power of the power storage device 14 reaches the limit, the power supply from the power storage device 14 is performed. Is limited to a part of the load devices 101, it is possible to ensure the operation of the load device 101 that should maintain a steady operation even during a momentary voltage drop or a power failure. The limit timing TC at this time is a set attenuation curve in the memory that is set in consideration of a voltage increase caused by limiting the power supply from the power storage device 14 to all of the load devices 101 and 102 to some of the load devices 101. And the output voltage thereof are compared, so that the period for supplying power from the power storage device 14 to all of the load devices 101 and 102 can be extended and operated.

この後には、商用電源Ｐが瞬低・停電から復旧したことを確認したときに（ステップＳ６１）、ステップＳ１１に戻って、インバータ１５や変圧器１６を介する蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   After this, when it is confirmed that the commercial power supply P has recovered from the instantaneous power failure / power failure (step S61), the process returns to step S11 to stop the power supply from the power storage device 14 via the inverter 15 and the transformer 16 At the same time, power supply from the commercial power source P at the voltage required for steady operation of the load devices 101 and 102 is resumed, and the instantaneous power failure / power failure detection and the power storage to the power storage device 14 are continued.

このように本実施形態においては、上述実施形態による作用効果に加えて、商用電源Ｐの瞬低・停電が復旧する最長時期ＴＳまで一部の負荷装置１０１を稼動させておくのに必要な蓄電電力まで消費しないように（蓄電装置１４内の蓄電電力を使い過ぎてしまう前に）、蓄電装置１４の出力電圧を実測しつつその蓄電電力を負荷装置１０１、１０２の全てに供給して稼動させることができる。したがって、早期に瞬低・停電から復旧したときに備えて、蓄電装置１４内に実際に蓄電されている電力を負荷装置１０１、１０２の全てに供給して、より長くその稼動状態を維持することができる。   As described above, in this embodiment, in addition to the operational effects of the above-described embodiment, the power storage necessary for operating some of the load devices 101 until the longest time TS when the instantaneous power failure / power failure of the commercial power supply P is restored. In order not to consume power (before the stored power in the power storage device 14 is used up excessively), the stored power is supplied to all of the load devices 101 and 102 while actually measuring the output voltage of the power storage device 14. be able to. Therefore, in preparation for an early recovery from an instantaneous power failure or power failure, the power actually stored in the power storage device 14 is supplied to all of the load devices 101 and 102 and the operation state is maintained for a longer time. Can do.

ここで、本実施形態の他の態様としては、上述実施形態では、一部の負荷装置１０１に電力供給する際の蓄電装置１４の出力電圧の第２減衰曲線ＣＬ２から、負荷装置１０２への電力供給の遮断による電圧上昇分ｉＲを減算した設定減衰曲線を、制御部１７のメモリ内に設定するが、これに限るものではなく、その第２減衰曲線をメモリ内に設定しておき、蓄電装置１４の出力電圧ＶＣにその電圧上昇分ｉＲを加算して、その第２減衰曲線に一致する出力電圧となる制限タイミングＴＣに、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切換・制限するようにしてもよい。   Here, as another aspect of the present embodiment, in the above-described embodiment, the power to the load device 102 from the second decay curve CL2 of the output voltage of the power storage device 14 when power is supplied to some of the load devices 101. Although the set attenuation curve obtained by subtracting the voltage increase iR due to the supply interruption is set in the memory of the control unit 17, the present invention is not limited to this, and the second attenuation curve is set in the memory to store the power storage device. The voltage increase iR is added to the output voltage VC of 14, and the power supply target from all of the load devices 101 and 102 is supplied from the power storage device 14 at the limit timing TC at which the output voltage matches the second attenuation curve. You may make it switch and restrict | limit to some load apparatuses 101. FIG.

次に、図６および図７は本発明に係る電圧低下対策装置の時間設定方法の第２実施形態を示す図である。   Next, FIG. 6 and FIG. 7 are diagrams showing a second embodiment of the time setting method of the voltage drop countermeasure device according to the present invention.

図６において、電圧低下対策装置４０は、上述実施形態におけるインバータ１５に代えて、入力される直流電圧を昇圧して出力するチョッパ（昇圧手段）４５ａを内蔵するインバータ４５を備えるとともに、接続部１１、１２、電源線Ｌｐ、整流器１３、蓄電装置１４、変圧器１６、制御部１７、検出器１８およびタイマ１９を備えて（電圧計３１を省いて）構築されている。   In FIG. 6, the voltage drop countermeasure device 40 includes an inverter 45 having a built-in chopper (boosting means) 45 a that boosts and outputs an input DC voltage in place of the inverter 15 in the above-described embodiment. , 12, power supply line Lp, rectifier 13, power storage device 14, transformer 16, control unit 17, detector 18 and timer 19 (without voltmeter 31).

この電圧低下対策装置４０では、インバータ４５がチョッパ４５ａを内蔵していることから、蓄電装置１４から受け取る直流電圧を昇圧してインバータ本体に受け渡すことができ、蓄電装置１４からの供給電力の電圧が負荷装置１０１を稼動させるのに必要な最低電圧ＶＬ未満である場合にも、稼動可能な最低電圧ＶＬ以上に昇圧した上で負荷装置１０１などに供給することができる。   In this voltage drop countermeasure device 40, since the inverter 45 has a built-in chopper 45a, the DC voltage received from the power storage device 14 can be boosted and transferred to the inverter main body, and the voltage of the power supplied from the power storage device 14 can be increased. Can be supplied to the load device 101 and the like after being boosted to the minimum voltage VL that can be operated or higher even when the voltage is lower than the minimum voltage VL necessary for operating the load device 101.

具体的には、図７（ａ）に示すように、チョッパ４５ａを内蔵していないインバータ１５の場合には、図中に二点鎖線で示す第２減衰曲線ＣＬ２（蓄電装置１４の出力電圧）を嵩上げすることができないことから、第１減衰曲線ＣＬ１と交差する高めの電圧ＶＣを制限タイミングＴＣにせざるを得ない。しかるに、チョッパ４５ａを内蔵しているインバータ４５の場合には、蓄電装置１４からの直流電圧を昇圧することができるので、一部の負荷装置１０１を稼動させるのに必要な最低必要電圧ＶＬを、図中に三点鎖線で示す第３減衰曲線ＣＬ３のように、蓄電装置１４の出力電圧が商用電源Ｐの瞬低・停電期間中に（時期ＴＳまで）下回ってもよく、その最低必要電圧ＶＬに昇圧することのできる出力電圧ＶＬ´まで、その蓄電装置１４の蓄電電力を利用することができる。ただし、インバータ１５を稼動させるのに必要な最低駆動電圧を下回る前にチョッパ４５ａを稼動させる必要がある。   Specifically, as shown in FIG. 7A, in the case of the inverter 15 that does not include the chopper 45a, the second attenuation curve CL2 (output voltage of the power storage device 14) indicated by a two-dot chain line in the drawing. Therefore, the higher voltage VC that intersects the first attenuation curve CL1 must be set to the limit timing TC. However, in the case of the inverter 45 incorporating the chopper 45a, the DC voltage from the power storage device 14 can be boosted, so that the minimum required voltage VL required to operate some of the load devices 101 is As shown in a third attenuation curve CL3 indicated by a three-dot chain line in the figure, the output voltage of the power storage device 14 may be lower (until time TS) during the instantaneous power failure or power failure of the commercial power supply P, and the minimum required voltage VL The stored power of the power storage device 14 can be used up to the output voltage VL ′ that can be boosted to the maximum. However, it is necessary to operate the chopper 45a before it falls below the minimum driving voltage required to operate the inverter 15.

これにより、図７（ｂ）に示すように、チョッパ４５ａを内蔵していないインバータ１５の場合には、第１、第２減衰曲線ＣＬ１、ＣＬ２の交差する高めの蓄電装置１４の出力電圧ＶＣを制限タイミングとしない限り、商用電源Ｐの瞬低・停電の復旧時期ＴＳまで負荷装置１０１を稼動させる最低必要電圧ＶＬ以上を確保できないが、チョッパ４５ａを内蔵するインバータ４５の場合には、その出力電圧ＶＣよりも低い蓄電装置１４の出力電圧ＶＣ´で、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切換・制限しても、その負荷装置１０１の稼動に必要な最低必要電圧ＶＬ以上のＶ−Ｔ特性線ＣＬ３に昇圧することができる。   Accordingly, as shown in FIG. 7B, in the case of the inverter 15 that does not include the chopper 45a, the output voltage VC of the higher power storage device 14 at which the first and second attenuation curves CL1 and CL2 intersect with each other is set. Unless the timing is limited, the minimum required voltage VL for operating the load device 101 cannot be secured until the commercial power supply P is immediately restored to the power failure recovery time TS. However, in the case of the inverter 45 incorporating the chopper 45a, the output voltage Even if the output voltage VC ′ of the power storage device 14 lower than VC is switched / restricted from all of the load devices 101 and 102 to the power supply target from the power storage device 14, the load device 101 The voltage can be boosted to a VT characteristic line CL3 having a minimum required voltage VL required for operation.

このことから、次のようにして、制御部１７のメモリ内に、瞬低・停電の発生時に電力供給する対象として負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する切換タイミングＴＣ'などを設定する。言い換えると、次に、電圧低下対策装置４０の時間設定方法を説明する。   From this, the switching timing TC for restricting all of the load devices 101 and 102 to a part of the load devices 101 as an object to be supplied with power in the event of a voltage sag or power failure in the memory of the control unit 17 as follows. Set 'etc. In other words, the time setting method of the voltage drop countermeasure device 40 will be described next.

このように、電圧低下対策装置４０は、蓄電装置１４からの出力電圧をチョッパ４５ａにより昇圧可能なインバータ４５を介して負荷側に電力供給することができることから、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切り換える時期として、次のような手順（方法）により最適な制限タイミングＴＣ´を求めて、制御部１７のメモリ内に設定する。すなわち、まずは、負荷装置１０１、１０２の全てに蓄電装置１４内の蓄電電力を供給する際の第１減衰曲線ＣＬ１が、商用電源Ｐが瞬低・停電から復旧するのに一般的に掛かる期間中に負荷装置１０１を稼動させるのに必要な最低必要電圧ＶＬ以上のＶ−Ｔ特性線ＣＬ３にチョッパ４５ａにより昇圧可能な電圧ＶＣ´に到達するまでの仮のタイミング（電源電圧の低下発生からの所要時間）ｔｃ´を求める。   Thus, the voltage drop countermeasure device 40 can supply power to the load side via the inverter 45 that can boost the output voltage from the power storage device 14 by the chopper 45a. As a timing for switching from all of the load devices 101 and 102 to some of the load devices 101, an optimum limit timing TC 'is obtained by the following procedure (method) and set in the memory of the control unit 17. That is, first, the first decay curve CL1 when supplying the stored power in the power storage device 14 to all the load devices 101 and 102 is generally during the period when the commercial power supply P is generally recovered from the instantaneous power failure / power failure. Temporary timing until the voltage VC ′ that can be boosted by the chopper 45a reaches the VT characteristic line CL3 that is equal to or higher than the minimum necessary voltage VL necessary for operating the load device 101 at the same time (required from the occurrence of the power supply voltage drop) Time) tc ′ is obtained.

この仮の到達タイミングｔｃ´を制限タイミングＴＣ´として、制御部１７のメモリ内に設定してもよいが、上述するように、蓄電装置１４から電力供給する対象を負荷装置郡１０１、１０２の全てから一部の負荷装置１０１に制限することによる電圧上昇ｉＲがあるので、第１減衰曲線ＣＬ１にその電圧上昇ｉＲを予め加算した値を用いて昇圧可能な電圧ＶＣ´になるまでの到達タイミング（逆に、電圧ＶＣ´からその電圧上昇ｉＲを予め減算した値を用いたときの到達タイミングでもよい）ＴＣ´を導出する。この後に、その到達タイミングＴＣ´を、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切り換えて制限する制限タイミングＴＣ´として設定する。なお、この制限タイミングＴＣ´における蓄電装置１４の供給電力は、出力電圧ＶＣ´から電圧上昇ｉＲしてインバータ４５のチョッパ４５ａに入力（供給）される。   The provisional arrival timing tc ′ may be set as the limit timing TC ′ in the memory of the control unit 17, but as described above, the power supply target from all of the load device groups 101 and 102 is set as the power supply target. Since there is a voltage increase iR due to restriction to a part of the load device 101, the arrival timing until the voltage VC ′ can be boosted using a value obtained by adding the voltage increase iR to the first attenuation curve CL1 in advance ( Conversely, it may be the arrival timing when a value obtained by subtracting the voltage increase iR from the voltage VC ′ in advance is used). After that, the arrival timing TC ′ is set as a limit timing TC ′ for switching the power supply target from the power storage device 14 from all of the load devices 101 and 102 to some of the load devices 101. Note that the power supplied from the power storage device 14 at the limit timing TC ′ is input (supplied) to the chopper 45a of the inverter 45 after the voltage rise iR from the output voltage VC ′.

そして、制御部１７は、上述実施形態と略同様に、商用電源Ｐの供給電力に瞬低・停電が発生すると、タイマ１９が瞬低・停電発生からの経過時間を計時するとともに、定常動作するのに必要な電圧で蓄電装置１４から負荷装置１０１、１０２の全てに電力供給する電源電圧低下対策制御動作を開始し、この後には、商用電源Ｐからの電力供給が正常に復旧したか否かを検出器１８による検出情報から、予め設定されている制限タイミングＴＣ´が経過するまで繰り返し確認し、瞬低・停電からの復旧が確認された場合には、蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧の電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Then, in a manner similar to the above-described embodiment, when an instantaneous drop or power failure occurs in the power supplied from the commercial power source P, the control unit 17 counts the elapsed time from the occurrence of the instantaneous voltage drop or power failure and operates in a steady state. The power supply voltage drop countermeasure control operation for supplying power from the power storage device 14 to all of the load devices 101 and 102 at the voltage required for the power supply is started, and thereafter, whether or not the power supply from the commercial power supply P has been restored normally Is repeatedly checked from the detection information by the detector 18 until a preset limit timing TC 'elapses, and if recovery from an instantaneous drop or power failure is confirmed, power supply from the power storage device 14 is performed. Simultaneously with the stop, the power supply of the voltage necessary for the steady operation of the load devices 101 and 102 is resumed from the commercial power supply P, and the detection of the instantaneous voltage drop / power failure and the power storage to the power storage device 14 are continued.

一方、商用電源Ｐが瞬低・停電から復旧することなく、制限タイミングＴＣ´に達した場合には、蓄電装置１４から電力供給する対象を一部の負荷装置１０１に制限して、停止させても問題のない負荷装置１０２の稼動を停止するとともに、インバータ４５のチョッパ４５ａの駆動を開始することにより、蓄電装置１４内の蓄電電力の消費を負荷装置１０１のみに抑えて、商用電源Ｐの瞬低・停電期間中の負荷装置１０１の稼動を維持する。   On the other hand, when the commercial power source P reaches the limit timing TC ′ without recovering from the instantaneous power failure or power failure, the power supply target from the power storage device 14 is limited to some load devices 101 and stopped. In addition, the operation of the load device 102 having no problem is stopped, and the chopper 45a of the inverter 45 is started to be driven, so that the consumption of the stored power in the power storage device 14 is suppressed only to the load device 101, and the commercial power supply P The operation of the load device 101 during the low power failure period is maintained.

これにより、商用電源Ｐが瞬低・停電から復旧するまで一部の負荷装置１０１を稼動させるのに最低限必要な電力を蓄電装置１４内に残すように、適正に設定されている制限タイミングＴＣ´まで負荷装置１０１、１０２の全てを稼動させることができ、瞬低・停電発生からその制限タイミングＴＣ´が経過した場合に、インバータ４５のチョッパ４５ａの駆動開始と共に蓄電装置１４からの電力供給をその一部の負荷装置１０１に制限することにより、瞬低・停電中でも（その復旧時期ＴＳまで）定常動作を維持すべき負荷装置１０１の稼動を確保することができる。このときの制限タイミングＴＣ´は、チョッパ４５ａによる蓄電装置１４の出力電圧の昇圧分までも考慮して設定されているので、蓄電装置１４から負荷装置１０１、１０２の全てに電力供給する期間を上述実施形態よりも延長して稼動させることができる。   As a result, the limit timing TC set appropriately so as to leave the minimum power necessary for operating some of the load devices 101 until the commercial power supply P recovers from the instantaneous power failure / power failure. All of the load devices 101 and 102 can be operated until ′, and when the limit timing TC ′ has elapsed since the occurrence of the instantaneous voltage drop or power failure, the power supply from the power storage device 14 is started at the same time when the chopper 45a of the inverter 45 starts to be driven. By restricting to some of the load devices 101, it is possible to ensure the operation of the load device 101 that should maintain a steady operation even during a voltage sag / power failure (until its restoration time TS). Since the limit timing TC ′ at this time is set in consideration of the boosted output voltage of the power storage device 14 by the chopper 45a, the period during which power is supplied from the power storage device 14 to all of the load devices 101 and 102 is described above. It can be operated longer than the embodiment.

この後には、商用電源Ｐが瞬低・停電から復旧したことを確認したときに、インバータ４５や変圧器１６を介する蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Thereafter, when it is confirmed that the commercial power supply P has recovered from the instantaneous power failure or power failure, the power supply from the power storage device 14 via the inverter 45 or the transformer 16 is stopped and simultaneously the load from the commercial power supply P is loaded. The power supply at the voltage necessary for the steady operation of the devices 101 and 102 is resumed, and the detection of the instantaneous voltage drop / power failure and the power storage in the power storage device 14 are continued.

このように本実施形態においては、上述実施形態による作用効果に加えて、チョッパ４５ａを設けることにより延長させた制限タイミングＴＣ´を越えて瞬低・停電が継続する場合に、負荷装置１０１、１０２の全てに蓄電装置１４内の蓄電電力を供給する状態から、一部の負荷装置１０１のみに電力供給を制限して消費する電力量をできるだけ抑えることができる。したがって、蓄電装置１４からより多くの蓄電電力を負荷装置１０１、１０２の全てに供給して、早期に瞬低・停電から復旧したときに備えて、より長く稼動状態を維持することができる。   As described above, in the present embodiment, in addition to the operational effects of the above-described embodiment, when the voltage sag / power failure continues beyond the limit timing TC ′ extended by providing the chopper 45a, the load devices 101 and 102 From the state in which the stored power in the power storage device 14 is supplied to all of the devices, the power supply can be limited to only some of the load devices 101 and the amount of power consumed can be suppressed as much as possible. Therefore, a larger amount of stored power can be supplied from the power storage device 14 to all of the load devices 101 and 102, and the operating state can be maintained for a longer time in preparation for an early recovery from a voltage sag / power failure.

次に、図８は本発明に係る電圧低下対策装置の第２実施形態を示す図である。
図８において、電圧低下対策装置５０は、接続部１１、１２と、電源線Ｌｐと、整流器１３と、蓄電装置１４と、変圧器１６と、制御部１７と、検出器１８と、電圧計３１と、インバータ４５と、を備えて（タイマ１９を省いて）構築されており、制御部１７は、不図示のメモリ内に格納する制御プログラムに従って検出器１８の検出情報などに基づいて開始した電源電圧低下対策制御において、その電圧計３１による測定電圧に応じて、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する。 Next, FIG. 8 is a diagram showing a second embodiment of the voltage drop countermeasure device according to the present invention.
In FIG. 8, the voltage drop countermeasure device 50 includes connecting portions 11 and 12, a power line Lp, a rectifier 13, a power storage device 14, a transformer 16, a control unit 17, a detector 18, and a voltmeter 31. And an inverter 45 (without the timer 19), and the control unit 17 starts power supply based on detection information of the detector 18 in accordance with a control program stored in a memory (not shown). In the voltage drop countermeasure control, according to the voltage measured by the voltmeter 31, the power supply target from the power storage device 14 is limited from all of the load devices 101 and 102 to some of the load devices 101.

すなわち、制御部１７は、上述実施形態においては、瞬低・停電の発生時からの経過時間に基づいて電源電圧低下対策制御を行っていたのに代えて、蓄電装置１４の出力電圧を実測して、その蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限する切換を行うように設計されており、そのメモリ内には、上述実施形態では予め導出した制限タイミングＴＣ´を設定していたのに代えて、この電圧低下対策装置４０では、インバータ４５に内蔵するチョッパ４５ａが、蓄電装置１４から受け取る直流電圧を昇圧してインバータ本体に受け渡すことができ、蓄電装置１４からの供給電力の電圧が負荷装置１０１、１０２を稼動させるのに必要な最低電圧ＶＬ未満である場合にも、稼動可能な最低電圧ＶＬ以上に昇圧した上で負荷装置１０１などに供給することができることから、その蓄電装置１４の出力電圧を実測して制限タイミングＴＣ´を適宜決定する。   That is, in the above-described embodiment, the control unit 17 actually measures the output voltage of the power storage device 14 instead of performing power supply voltage reduction countermeasure control based on the elapsed time from the occurrence of the instantaneous voltage drop or power failure. The power supply device 14 is designed to perform switching to limit the target of power supply from all of the load devices 101 and 102 to a part of the load devices 101. Instead of setting the derived limit timing TC ', in this voltage drop countermeasure device 40, the chopper 45a built in the inverter 45 boosts the DC voltage received from the power storage device 14 and delivers it to the inverter body. Even when the voltage of the power supplied from the power storage device 14 is less than the minimum voltage VL required to operate the load devices 101 and 102, the minimum operable Since it is possible to supply such a load device 101 after having been boosted to greater than pressure VL, appropriately determines the restriction timing TC' by actually measuring the output voltage of the power storage device 14.

詳細には、蓄電装置１４の出力電圧は、図７（ａ）に示すように、第３減衰曲線ＣＬ３が商用電源Ｐの瞬低・停電の復旧時期ＴＳまでに一部の負荷装置１０１を稼動させるのに必要な最低必要電圧ＶＬを下回っても、図７（ｂ）に示すように、インバータ４５の稼動に必要な最低駆動電圧を下回る前であって、同時に、商用電源Ｐの瞬低・停電の復旧時期ＴＳまで一部の負荷装置１０１の稼動に必要な電力が蓄電装置１４内に残っていれば、インバータ４５に内蔵するチョッパ４５ａがその負荷装置１０１の稼動に必要な最低必要電圧ＶＬ以上のＶ−Ｔ特性線ＣＬ３に電圧ＶＣ´から昇圧させることができる。このことから、制御部１７のメモリ内には、その電圧ＶＣ´から、負荷装置１０２の電力供給の遮断による電圧上昇分ｉＲを予め減算した電圧を設定しておく。そして、制御部１７は、メモリ内のその設定電圧に蓄電装置１４の出力電圧が一致した制限タイミングＴＣ´に、蓄電装置１４から電力供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切換・制限する。   Specifically, as shown in FIG. 7A, the output voltage of the power storage device 14 is such that the third attenuation curve CL3 operates a part of the load device 101 before the commercial power supply P is instantaneously lowered or power is restored. Even if the required voltage VL is lower than the minimum required voltage VL, the voltage before the inverter 45 is lowered below the minimum drive voltage as shown in FIG. If power necessary for operation of some of the load devices 101 remains in the power storage device 14 until the power failure recovery time TS, the chopper 45a built in the inverter 45 requires the minimum necessary voltage VL required for operation of the load device 101. The VT characteristic line CL3 can be boosted from the voltage VC ′. For this reason, in the memory of the control unit 17, a voltage obtained by previously subtracting the voltage increase iR due to the interruption of the power supply of the load device 102 is set from the voltage VC ′. Then, the control unit 17 sets a target to be supplied with power from the power storage device 14 from all of the load devices 101 and 102 at a limit timing TC ′ at which the output voltage of the power storage device 14 matches the set voltage in the memory. Switch / restrict to device 101.

具体的には、制御部１７は、上述実施形態と同様に、商用電源Ｐの供給電力に瞬低・停電が発生すると、定常動作するのに必要な電圧で蓄電装置１４から負荷装置１０１、１０２の全てに電力供給するのと同時に、その蓄電装置１４の出力電圧を測定する電源電圧低下対策制御動作を開始して、この後には、商用電源Ｐからの電力供給が正常に復旧したか否かを検出器１８による検出情報から繰り返し確認するとともに、その都度、蓄電装置１４の出力電圧がメモリ内の設定電圧に一致したか否かを電圧計３１による測定情報から繰り返し確認し、その設定電圧に一致する前に商用電源Ｐの瞬低・停電からの復旧が確認された場合には、蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧の電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Specifically, as in the above-described embodiment, when the power supply of the commercial power supply P undergoes a sag or power failure, the control unit 17 uses the voltage required for steady operation from the power storage device 14 to the load devices 101, 102. At the same time as supplying power to all of the power supply, the power supply voltage drop countermeasure control operation for measuring the output voltage of the power storage device 14 is started, and thereafter, whether or not the power supply from the commercial power supply P has been restored normally. Is repeatedly confirmed from the detection information by the detector 18 and each time, it is repeatedly confirmed from the measurement information by the voltmeter 31 whether or not the output voltage of the power storage device 14 matches the set voltage in the memory. When it is confirmed that the commercial power supply P has recovered from an instantaneous power failure or power failure before matching, the power supply from the power storage device 14 is stopped and at the same time the steady operation of the load devices 101 and 102 from the commercial power supply P is performed. As to resume the power supply voltage required to continue the power storage to the detection and the power storage device 14 of the voltage sag service interruption.

一方、商用電源Ｐが瞬低・停電から復旧する前に、蓄電装置１４が設定電圧まで減衰した場合には、インバータ４５のチョッパ４５ａの駆動を開始するとともに、その蓄電装置１４から電力供給する対象を一部の負荷装置１０１に制限して、停止しても問題のない負荷装置１０２の稼動を停止することにより、蓄電装置１４内の蓄電電力の消費を負荷装置１０１のみに抑えて、商用電源Ｐの瞬低・停電期間中の負荷装置１０１の稼動を維持する。   On the other hand, when the power storage device 14 is attenuated to the set voltage before the commercial power supply P recovers from the instantaneous power failure / power failure, the drive of the chopper 45a of the inverter 45 is started and power is supplied from the power storage device 14 Is limited to a part of the load devices 101, and the operation of the load device 102 that does not cause a problem even if it is stopped is stopped, so that the consumption of the stored power in the power storage device 14 is limited to only the load device 101, and the commercial power supply The operation of the load device 101 is maintained during the P instantaneous power failure / power failure period.

これにより、蓄電装置１４内に残る蓄電電力を出力電圧により実測して、商用電源Ｐが瞬低・停電から復旧するまでチョッパ４５ａにより昇圧した上で一部の負荷装置１０１を稼動させるのに最低限必要な電力を蓄電装置１４内に残すことのできる制限タイミングＴＣ´のぎりぎりまで、負荷装置１０１、１０２の全てを稼動させることができ、その蓄電装置１４の蓄電電力が限界に達したときに、蓄電装置１４からの電力供給を一部の負荷装置１０１に制限することにより、瞬低・停電時にも定常動作を維持すべき負荷装置１０１の稼動を確保することができる。このときの制限タイミングＴＣ´は、蓄電装置１４からの電力供給を負荷装置１０１、１０２の全てから一部の負荷装置１０１に制限することによる電圧上昇分を考慮して設定したメモリ内の設定電圧とその出力電圧とを比較するので、蓄電装置１４から負荷装置１０１、１０２の全てに電力供給する期間をできるだけ延長して稼動させることができる。   As a result, the stored power remaining in the power storage device 14 is actually measured by the output voltage, and the minimum is required to operate some of the load devices 101 after the commercial power supply P is boosted by the chopper 45a until the power supply P recovers from the instantaneous power failure or power failure. When all the load devices 101 and 102 can be operated until the limit timing TC ′ at which the necessary power can be left in the power storage device 14, and the stored power of the power storage device 14 reaches the limit By restricting the power supply from the power storage device 14 to a part of the load devices 101, it is possible to ensure the operation of the load device 101 that should maintain a steady operation even during a momentary voltage drop or a power failure. The limit timing TC ′ at this time is a set voltage in the memory set in consideration of a voltage increase due to limiting the power supply from the power storage device 14 to all of the load devices 101 and 102 to some of the load devices 101. And the output voltage thereof are compared, so that the period for supplying power from the power storage device 14 to all of the load devices 101 and 102 can be extended and operated.

この後には、商用電源Ｐが瞬低・停電から復旧したことを確認したときに、インバータ４５や変圧器１６を介する蓄電装置１４内からの電力供給を停止するのと同時に、商用電源Ｐから負荷装置１０１、１０２の定常動作に必要な電圧での電力供給を再開するとともに、瞬低・停電の検知と蓄電装置１４への蓄電を継続する。   Thereafter, when it is confirmed that the commercial power supply P has recovered from the instantaneous power failure or power failure, the power supply from the power storage device 14 via the inverter 45 or the transformer 16 is stopped and simultaneously the load from the commercial power supply P is loaded. The power supply at the voltage necessary for the steady operation of the devices 101 and 102 is resumed, and the detection of the instantaneous voltage drop / power failure and the power storage in the power storage device 14 are continued.

このように本実施形態においては、上述実施形態による作用効果に加えて、商用電源Ｐの瞬低・停電が復旧する最長時期ＴＳまで一部の負荷装置１０１を稼動させておくのに必要な蓄電装置１４内の蓄電電力をチョッパ４５ａの昇圧により少なくすることができ、その蓄電装置１４から負荷装置１０１、１０２の全てに電力供給して稼動させることのできる期間を延長することができる。したがって、早期に瞬低・停電から復旧したときに備えて、蓄電装置１４内に実際に蓄電されている電力を負荷装置１０１、１０２の全てに供給して、より長くその稼動状態を維持することができる。   As described above, in this embodiment, in addition to the operational effects of the above-described embodiment, the power storage necessary for operating some of the load devices 101 until the longest time TS when the instantaneous power failure / power failure of the commercial power supply P is restored. The stored power in the device 14 can be reduced by boosting the chopper 45a, and the period during which power can be supplied from the power storage device 14 to all of the load devices 101 and 102 can be extended. Therefore, in preparation for an early recovery from a voltage sag or power failure, the power actually stored in the power storage device 14 is supplied to all of the load devices 101 and 102 and the operation state is maintained for a longer time. Can do.

ここで、本実施形態の他の態様としては、上述実施形態では、一部の負荷装置１０１に電力供給する際の負荷装置１０２への電力供給の遮断による電圧上昇分ｉＲを減算した設定電圧を制御部１７のメモリ内に設定するが、これに限るものではなく、その実測する蓄電装置１４の出力電圧にその電圧上昇分ｉＲを加算して、その電圧上昇分ｉＲの減算のない設定電圧に一致するタイミングＴＣ´に、蓄電装置１４内の蓄電電力を供給する対象を負荷装置１０１、１０２の全てから一部の負荷装置１０１に切換・制限するようにしてもよい。   Here, as another aspect of the present embodiment, in the above-described embodiment, the set voltage obtained by subtracting the voltage increase iR due to the interruption of the power supply to the load device 102 when supplying power to some of the load devices 101 is used. Although it is set in the memory of the control unit 17, the present invention is not limited to this, and the voltage increase iR is added to the actually measured output voltage of the power storage device 14, so that the voltage increase iR is not subtracted. At the coincident timing TC ′, the target for supplying the stored power in the power storage device 14 may be switched / restricted from all of the load devices 101, 102 to some of the load devices 101.

これまで本発明の一実施形態について説明したが、本発明は上述の実施形態に限定されず、その技術的思想の範囲内において種々異なる形態にて実施されてよいことは言うまでもない。例えば、上述実施形態では、瞬間的に電圧の低下する瞬低の発生時にも、停電発生時と同様に対策制御を実行する場合を説明するが、電力供給の途絶える期間が瞬低よりも長くなる場合の多い停電発生時にのみこの対策制御を実行するように設計してもよいことはいうまでもない。   Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea. For example, in the above-described embodiment, a case will be described in which countermeasure control is executed in the same way as when a power failure occurs even when an instantaneous voltage drop that instantaneously decreases in voltage. It goes without saying that this countermeasure control may be designed to be executed only when a power failure occurs in many cases.

１０、３０、４０、５０……電圧低下対策装置 １１、１２……接続部
１３……整流器 １４……蓄電装置 １５、４５……インバータ ４５ａ……チョッパ １６……変圧器 １７……制御部 １８……検出器 １９……タイマ ２０……スイッチ １０１、１０２……負荷装置 Ｌｐ……電源線 Ｐ……商用電源 10, 30, 40, 50 ... Voltage drop countermeasure device 11, 12 ... Connection unit 13 ... Rectifier 14 ... Power storage device 15, 45 ... Inverter 45a ... Chopper 16 ... Transformer 17 ... Control unit 18 ... Detector 19 ... Timer 20 ... Switch 101, 102 ... Load device Lp ... Power line P ... Commercial power supply

Claims (7)

電源からの電力を負荷装置に供給する供給経路と、電源からの電力を電気エネルギーとして蓄電する蓄電手段と、該蓄電手段内の蓄電エネルギーを供給電力として負荷装置に供給する供給手段と、を備えて、電源から供給される電力の電圧が低下する電源電圧低下期間中に蓄電手段内から電力を供給して負荷装置の稼動を維持する電圧低下対策装置であって、
蓄電手段の出力電圧を測定する測定手段と、電源電圧低下が発生した場合に測定手段による測定電圧に基づいて負荷装置への電力供給を制限する電圧低下対策制御を実行する制御手段と、を備えることを特徴とする電圧低下対策装置。 A supply path for supplying power from the power source to the load device; a power storage means for storing the power from the power source as electrical energy; and a supply means for supplying the stored energy in the power storage means to the load device as supply power. A voltage drop countermeasure device that supplies power from within the power storage means and maintains the operation of the load device during the power supply voltage drop period during which the voltage of the power supplied from the power supply decreases,
Measuring means for measuring the output voltage of the power storage means, and control means for executing voltage drop countermeasure control for limiting power supply to the load device based on the measurement voltage by the measuring means when a power supply voltage drop occurs. A voltage drop countermeasure device characterized by that. 前記蓄電手段は蓄電する電力を出力するに従って該出力電圧が減衰する特性を有しており、
前記制御手段は、
電源電圧低下発生時からの経過時間を計時する計時手段と、
電源電圧低下発生時に稼動状態を維持すべき負荷装置の一部を予め設定する装置設定手段と、
該装置設定手段内の設定負荷装置を電源電圧低下発生時から稼動させる期間を予め設定する期間設定手段と、
装置設定手段内の設定負荷装置のみを蓄電手段からの供給電力で稼動させる場合に当該供給電圧が該稼動に最低限必要な電圧に達するまでの減衰曲線を予め設定する減衰傾向設定手段と、
を備えて、電源電圧低下発生時には、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、電源電圧低下発生時からの期間設定手段内の設定期間の終わりに最低必要電圧を一致させた減衰傾向設定手段内の設定減衰曲線に略一致するタイミングに、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することを特徴とする請求項１に記載の電圧低下対策装置。 The power storage means has a characteristic that the output voltage attenuates as power stored is output.
The control means includes
A time measuring means for measuring the elapsed time since the occurrence of the power supply voltage drop;
Device setting means for presetting a part of the load device that should maintain the operating state when a power supply voltage drop occurs;
Period setting means for presetting a period for operating the setting load device in the apparatus setting means from the time of occurrence of a power supply voltage drop;
Attenuation tendency setting means for presetting an attenuation curve until the supply voltage reaches the minimum voltage required for operation when operating only the set load device in the apparatus setting means with the power supplied from the power storage means;
When the power supply voltage drop occurs, the measured voltage of the output voltage from the power storage means that supplies power to all of the load devices is the minimum required voltage at the end of the set period in the period setting means from the occurrence of the power supply voltage drop. 2. The voltage according to claim 1, wherein the power supply from the power storage unit is limited to only the set load device in the device setting unit at a timing substantially matching the set attenuation curve in the matched attenuation tendency setting unit. Reduction countermeasure device. 前記供給手段に、蓄電手段から受け取る供給電力の電圧を昇圧する昇圧手段を設けたことを特徴とする請求項１または２に記載の電圧低下対策装置。   3. The voltage drop countermeasure device according to claim 1, wherein the supply unit includes a boosting unit that boosts a voltage of supplied power received from the power storage unit. 前記供給手段に、蓄電手段から受け取る供給電力の電圧を昇圧する昇圧手段を設けるとともに、
前記減衰傾向設定手段には、該昇圧手段を介する蓄電手段からの供給電力で装置設定手段内の設定負荷装置のみを稼動させる場合に該稼動に最低限必要な当該昇圧手段前段の供給電圧を予め設定して、
前記制御手段は、電源電圧低下発生時には、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、減衰傾向設定手段内の設定電圧に略一致するタイミングに、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することを特徴とする請求項１または２に記載の電圧低下対策装置。 The supply means is provided with a boosting means for boosting the voltage of the supply power received from the power storage means,
In the attenuation tendency setting means, when only the set load device in the apparatus setting means is operated with the power supplied from the power storage means via the boosting means, the supply voltage of the preceding stage of the boosting means necessary for the operation is previously stored. Set
When the power supply voltage drop occurs, the control means supplies the power from the power storage means at a timing when the measured voltage of the output voltage from the power storage means that supplies power to all of the load devices substantially matches the set voltage in the attenuation tendency setting means. 3. The voltage drop countermeasure device according to claim 1, wherein the supply is limited only to a set load device in the device setting means. 前記昇圧手段は、制御手段により駆動・停止が制御されて、該制御手段が蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限するタイミングに駆動を開始することを特徴とする請求項３または４に記載の電圧低下対策装置。   The boosting means is controlled to be driven / stopped by the control means, and the control means starts driving at a timing when the power supply from the power storage means is limited only to the set load device in the device setting means. The voltage drop countermeasure device according to claim 3 or 4. 前記制御手段は、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧が、蓄電手段内の蓄電エネルギーを供給電力として負荷装置に供給する供給動作を行うのに必要な下限電圧を超える前に、昇圧手段の駆動を開始することを特徴とする請求項５に記載の電圧低下対策装置。   The control means has a lower limit voltage required for performing a supply operation in which the measured voltage of the output voltage from the power storage means that supplies power to all of the load devices is supplied to the load device using the stored energy in the power storage means as supply power. 6. The voltage drop countermeasure device according to claim 5, wherein driving of the boosting means is started before exceeding. 前記制御手段は、蓄電手段からの電力供給を装置設定手段内の設定負荷装置のみに制限することにより該蓄電手段からの出力電圧が上昇する電圧値を、負荷装置の全部に電力供給する蓄電手段からの出力電圧の測定電圧に加算、あるいは、設定減衰曲線から減算することを特徴とする請求項１から６に記載の電圧低下対策装置。   The control means restricts the power supply from the power storage means to only the set load device in the device setting means, and the power storage means supplies the power to all of the load devices with a voltage value at which the output voltage from the power storage means increases. The voltage drop countermeasure device according to any one of claims 1 to 6, wherein the output voltage is added to the measured voltage or subtracted from the set attenuation curve.
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