JP2007159234A - Uninterruptible power supply device - Google Patents
Uninterruptible power supply device Download PDFInfo
- Publication number
- JP2007159234A JP2007159234A JP2005349372A JP2005349372A JP2007159234A JP 2007159234 A JP2007159234 A JP 2007159234A JP 2005349372 A JP2005349372 A JP 2005349372A JP 2005349372 A JP2005349372 A JP 2005349372A JP 2007159234 A JP2007159234 A JP 2007159234A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor unit
- voltage
- power supply
- capacitor
- uninterruptible power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 56
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 24
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000005856 abnormality Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Inverter Devices (AREA)
Abstract
Description
この発明は、商用電源異常時に負荷に電力を供給する無停電電源装置に関するものである。 The present invention relates to an uninterruptible power supply that supplies power to a load when a commercial power supply is abnormal.
従来の無停電電源装置においては、交流電源から、直流出力端間に大容量コンデンサを接続したコンバータ、および個々のアームに逆並列ダイオードを接続した電圧型インバータを介して、負荷に交流電力を供給する無停電電源装置において、大容量コンデンサの初期充電時に、大容量コンデンサの充電電流が過大にならないように電流の位相制御を行う初期充電制御手段と、装置運転停止に伴う大容量コンデンサの完全放電時に、大容量コンデンサの放電電流が過大にならないように電流制御を行う完全放電制御手段とを備えたものがある（例えば、特許文献１参照）。
バックアップ電源用の大容量コンデンサを完全放電する際には、次の内のどちらか一方または両方同時を選択する。その一方は、一方のスイッチをＯＮしてコンバータで電流制御し、交流電源に回生電流を流す。その他方は、他のスイッチをＯＮし、インバータを電流制御型インバータとして電流制御し、交流電源に回生電流を流す。そして、大容量コンデンサの放電がほぼ完了した後は、他のスイッチをオフし、トランスの励磁インピーダンスを用いて完全放電させる。
In conventional uninterruptible power supplies, AC power is supplied to the load from an AC power source through a converter with a large-capacity capacitor connected between the DC output terminals and a voltage-type inverter with an antiparallel diode connected to each arm. In the uninterruptible power supply, the initial charge control means that controls the phase of the current so that the charge current of the large-capacity capacitor does not become excessive during the initial charge of the large-capacitance capacitor, and the complete discharge of the large-capacitance capacitor when the device stops Sometimes, there is provided a complete discharge control means for performing current control so that the discharge current of the large-capacity capacitor does not become excessive (see, for example, Patent Document 1).
When fully discharging the large-capacitance capacitor for the backup power supply, one or both of the following is selected. One of them turns on one of the switches, controls the current with a converter, and flows a regenerative current to the AC power supply. In the other case, the other switch is turned on, the inverter is controlled as a current control type inverter, and a regenerative current is supplied to the AC power supply. Then, after the large-capacitance capacitor is almost completely discharged, the other switches are turned off to completely discharge using the exciting impedance of the transformer.
キャパシタユニットのメンテナンスなどの際に、キャパシタユニットを完全放電させる必要があり、そのために最終的にはＰＮを短絡することになる。キャパシタ容量Ｃ[F]と短絡する直前のキャパシタ電圧Ｖ[V]の間には、次の関係が満足されている必要がある。（ＵＬ１７７８ ３１．７）
０．５×Ｃ×Ｖ＾２≦20[J] ・・・（１）
例えば、Ｃ＝５０[F]とすると、
Ｖ≦０．８９[V] までキャパシタを放電させる必要がある。
従来の無停電電源装置では、上記の方法でキャパシタユニットを放電させていたため、キャパシタ電圧が低くなると、スイッチのオフ時間が長くなる。また、他のスイッチをオフし、トランスの励磁インピーダンスを用いて完全放電させる場合も、キャパシタ電圧が低くなると放電電流が小さくなる。したがって、上記（１）式を満足する電圧まで放電させるのに時間がかかるという問題点があった。
When the capacitor unit is maintained, it is necessary to completely discharge the capacitor unit. For this reason, the PN is eventually short-circuited. The following relationship needs to be satisfied between the capacitor capacitance C [F] and the capacitor voltage V [V] immediately before the short circuit. (UL1778 31.7)
0.5 × C × V ^ 2 ≦ 20 [J] (1)
For example, if C = 50 [F],
It is necessary to discharge the capacitor until V ≦ 0.89 [V].
In the conventional uninterruptible power supply, since the capacitor unit is discharged by the above method, when the capacitor voltage becomes low, the switch off time becomes long. In addition, when other switches are turned off and complete discharge is performed using the excitation impedance of the transformer, the discharge current decreases as the capacitor voltage decreases. Therefore, there is a problem that it takes time to discharge to a voltage satisfying the above expression (1).
この発明は上記のような課題を解決するためになされたものであり、短時間でキャパシタユニットを完全放電できる無停電電源装置を得ることを目的とする。 The present invention has been made to solve the above-described problems, and an object thereof is to obtain an uninterruptible power supply capable of completely discharging a capacitor unit in a short time.
この発明に係る無停電電源装置においては、バックアップ電源用のキャパシタユニットと、一端が前記キャパシタユニットに接続され、他端が変圧器とスイッチを介して電力系統に接続された双方向変換器とを備えたものにおいて、キャパシタユニットを完全放電する際に、キャパシタユニットの電圧が設定電圧よりも低くなることをトリガとして、双方向変換器のＰ側素子とＮ側素子を同時にＯＮさせて、キャパシタユニットのＰＮを短絡することにより、キャパシタユニットを完全放電するものである。 In the uninterruptible power supply according to the present invention, a capacitor unit for backup power supply and a bidirectional converter having one end connected to the capacitor unit and the other end connected to the power system via a transformer and a switch. When the capacitor unit is completely discharged, the P-side element and the N-side element of the bidirectional converter are simultaneously turned on by using the voltage of the capacitor unit to be lower than the set voltage as a trigger. By short-circuiting the PN, the capacitor unit is completely discharged.
この発明によれば、キャパシタユニット放電時に、双方向変換器をキャパシタ放電モードで動作させ、キャパシタ電圧が所定の電圧以下になると、双方向変換器をＰ側の素子とＮ側の素子を同時にＯＮさせて、キャパシタ短絡モードで動作させるようにしたので、キャパシタユニットの完全放電時間を短縮することができる。 According to the present invention, when the capacitor unit is discharged, the bidirectional converter is operated in the capacitor discharge mode, and when the capacitor voltage becomes a predetermined voltage or less, the bidirectional converter is turned on at the same time on the P side element and the N side element. Since the capacitor is operated in the capacitor short-circuit mode, the complete discharge time of the capacitor unit can be shortened.
実施の形態１．
以下、この発明の実施の形態１を図１に基づいて説明する。常時は商用電源１が負荷２に半導体スイッチ３を介して電力を供給している。また、双方向変換器４は直流電圧制御状態にあり、キャパシタユニット５を充電している。
商用電源１に異常が発生すると、ＶＴ６で測定した入力電圧が異常であることを電圧異常検出回路７で検出する。電圧異常検出回路７で異常を検出すると双方向変換器４に直流電圧制御状態から交流電圧制御状態に切り換える信号を出す。それと同時にスイッチ３に遮断信号を出す。
キャパシタユニット５を放電する際は、双方向変換器４を電流制御状態に切り換え、商用電源１に回生電流を流す。キャパシタユニット５の電圧が、設定電圧１まで下がるとスイッチ９を開放し、変圧器８の励磁インピーダンスにより放電させる。このときも双方向変換器４は電流制御状態で動作する。キャパシタユニット５の電圧がさらに下がって、設定電圧２以下になると、双方向変換器４をＰ側素子とＮ側素子を同時にＯＮさせる短絡制御状態に切り換え、キャパシタユニット５のＰＮを短絡させることにより完全放電させる。
Embodiment 1 FIG.
A first embodiment of the present invention will be described below with reference to FIG. At all times, the commercial power supply 1 supplies power to the
When an abnormality occurs in the commercial power source 1, the voltage
When discharging the capacitor unit 5, the bidirectional converter 4 is switched to the current control state, and a regenerative current is supplied to the commercial power source 1. When the voltage of the capacitor unit 5 drops to the set voltage 1, the
次に、双方向変換器４の短絡制御状態の動作を図２に基づいて説明する。キャパシタユニット５の電圧が設定電圧２以下になると、双方向変換器４の各変換器素子１１、１２、２１、２２、３１、３２に同時にＯＮ指令を出し、キャパシタユニット５のＰＮを短絡させることにより完全放電させる。
例として、キャパシタユニット５の容量を５０[F]、内部抵抗を２０[ｍΩ]、変圧器８の双方向変換器側の定格線間電圧を３００[V]、双方向変換器４の各変換器素子１１、１２、２１、２２、３１、３２の定格電流を１０００[A]の場合の動作について説明する。
設定電圧は、
設定電圧１＝√２×３００＝４２４[V]
設定電圧２＝１０００×２０／１０００×３＝６０[V]・・・（２）
に設定される。変圧器８の双方向変換器側の電圧がキャパシタユニット５の電圧より高いと、双方向変換器４のダイオード１３、１４、２３、２４、３３、３４を通ってキャパシタユニット５が充電されてしまう。したがって、キャパシタユニット５の電圧が変圧器８の双方向変換器側の電圧の最大値４２４Ｖ以下になった時点で、スイッチ９を開放して系統からキャパシタユニット５が充電されることが無いようにし、変圧器８の励磁インピーダンスにより放電させる。
キャパシタユニット５の電圧が高い状態で、双方向変換器４のＰ側素子とＮ側素子を同時にＯＮさせると、過電流により変換器素子が破損する。キャパシタユニット５の内部抵抗と変換器素子の定格電流から、双方向変換器４のＰ側素子とＮ側素子を同時にＯＮさせることができるキャパシタユニット５の電圧が求められる。上記（２）式で３倍されているのは、３相分同時にＯＮするためである。双方向変換器４の各変換器素子１１、１２、２１、２２、３１、３２を同時にＯＮすることにより、６０Ｖから瞬時にキャパシタユニット５を完全放電することができる。
Next, the operation of the bidirectional converter 4 in the short-circuit control state will be described with reference to FIG. When the voltage of the capacitor unit 5 becomes equal to or lower than the
As an example, the capacitance of the capacitor unit 5 is 50 [F], the internal resistance is 20 [mΩ], the rated line voltage on the bidirectional converter side of the
The set voltage is
Setting voltage 1 = √2 × 300 = 424 [V]
Setting
Set to If the voltage on the bidirectional converter side of the
If the P-side element and the N-side element of the bidirectional converter 4 are simultaneously turned on while the voltage of the capacitor unit 5 is high, the converter element is damaged due to overcurrent. From the internal resistance of the capacitor unit 5 and the rated current of the converter element, the voltage of the capacitor unit 5 that can simultaneously turn on the P-side element and the N-side element of the bidirectional converter 4 is obtained. The reason why it is multiplied by 3 in the above equation (2) is to turn on simultaneously for three phases. By simultaneously turning on the
１ 商用電源
２ 負荷
３ 半導体スイッチ
４ 双方向変換器
５ キャパシタユニット
６ ＶＴ
７ 電圧異常検出回路
８ 変圧器
９ スイッチ
１１、１２、２１、２２、３１、３２ 変換器素子
１３、１４、２３、２４、３３、３４ ダイオード
1
7 Voltage
Claims (1)
前記キャパシタユニットを完全放電する際に、キャパシタユニットの電圧が設定電圧よりも低くなることをトリガとして、前記双方向変換器のＰ側素子とＮ側素子を同時にＯＮさせて、前記キャパシタユニットのＰＮを短絡することにより、前記キャパシタユニットを完全放電することを特徴とする無停電電源装置。 In an uninterruptible power supply comprising a capacitor unit for a backup power source and a bidirectional converter having one end connected to the capacitor unit and the other end connected to a power system via a transformer and a switch,
When the capacitor unit is completely discharged, the P-side element and the N-side element of the bidirectional converter are simultaneously turned on, triggered by the fact that the voltage of the capacitor unit becomes lower than the set voltage. The capacitor unit is completely discharged by short-circuiting the uninterruptible power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005349372A JP4774961B2 (en) | 2005-12-02 | 2005-12-02 | Uninterruptible power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005349372A JP4774961B2 (en) | 2005-12-02 | 2005-12-02 | Uninterruptible power system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007159234A true JP2007159234A (en) | 2007-06-21 |
| JP4774961B2 JP4774961B2 (en) | 2011-09-21 |
Family
ID=38242878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005349372A Active JP4774961B2 (en) | 2005-12-02 | 2005-12-02 | Uninterruptible power system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4774961B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014117023A (en) * | 2012-12-07 | 2014-06-26 | Toshiba Mitsubishi-Electric Industrial System Corp | Bidirectional converter and uninterruptible power supply using the same |
| WO2014201025A1 (en) * | 2013-06-10 | 2014-12-18 | Active Power, Inc. | Apparatus and methods for control of load power quality in uninteruptible power systems |
| JP2015136213A (en) * | 2014-01-16 | 2015-07-27 | トヨタ自動車株式会社 | Power converter of electric vehicle |
| JP2016077031A (en) * | 2014-10-02 | 2016-05-12 | ファナック株式会社 | Motor controller with discharge function for dc link residual energy |
| CN106464124A (en) * | 2014-05-21 | 2017-02-22 | 伊顿公司 | Ups systems and methods using coordinated static switch and inverter operation for generator walk-in |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05292679A (en) * | 1992-04-10 | 1993-11-05 | Meidensha Corp | Power converter |
| JPH07241084A (en) * | 1994-02-25 | 1995-09-12 | Toshiba Corp | Uninterruptible power supply |
| JPH0823672A (en) * | 1989-05-18 | 1996-01-23 | Hirotami Nakano | Switching power unit and its insulating method |
| JP2003348856A (en) * | 2002-05-28 | 2003-12-05 | Mitsubishi Electric Corp | Power supply device |
-
2005
- 2005-12-02 JP JP2005349372A patent/JP4774961B2/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0823672A (en) * | 1989-05-18 | 1996-01-23 | Hirotami Nakano | Switching power unit and its insulating method |
| JPH05292679A (en) * | 1992-04-10 | 1993-11-05 | Meidensha Corp | Power converter |
| JPH07241084A (en) * | 1994-02-25 | 1995-09-12 | Toshiba Corp | Uninterruptible power supply |
| JP2003348856A (en) * | 2002-05-28 | 2003-12-05 | Mitsubishi Electric Corp | Power supply device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014117023A (en) * | 2012-12-07 | 2014-06-26 | Toshiba Mitsubishi-Electric Industrial System Corp | Bidirectional converter and uninterruptible power supply using the same |
| WO2014201025A1 (en) * | 2013-06-10 | 2014-12-18 | Active Power, Inc. | Apparatus and methods for control of load power quality in uninteruptible power systems |
| JP2015136213A (en) * | 2014-01-16 | 2015-07-27 | トヨタ自動車株式会社 | Power converter of electric vehicle |
| CN106464124A (en) * | 2014-05-21 | 2017-02-22 | 伊顿公司 | Ups systems and methods using coordinated static switch and inverter operation for generator walk-in |
| CN106464124B (en) * | 2014-05-21 | 2019-02-15 | 伊顿公司 | Use the static switch for the coordination stepped into for generator and the ups system of inverter operation and method |
| JP2016077031A (en) * | 2014-10-02 | 2016-05-12 | ファナック株式会社 | Motor controller with discharge function for dc link residual energy |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4774961B2 (en) | 2011-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5875214B2 (en) | Power conversion system | |
| CN107359688B (en) | Fault processing method and device for power supply equipment | |
| EP3565101B1 (en) | Switching control method for isolated bidirectional dc-dc converter | |
| US11355939B2 (en) | Device and process for discharging an intermediate circuit capacitor and process for producing a device for discharging an intermediate circuit capacitor | |
| WO2016147413A1 (en) | Converter unit system and converter unit | |
| JP2010081703A (en) | Power supply control system for vehicle | |
| JP6973739B2 (en) | Control system that switches the DC-DC voltage converter from boost operation mode to safe operation mode | |
| JP2014110666A (en) | Discharge control system, and discharge device | |
| JP4774961B2 (en) | Uninterruptible power system | |
| JP2003123569A (en) | Direct current vacuum circuit breaker | |
| JP6884922B2 (en) | Power converter | |
| JP5882884B2 (en) | Uninterruptible power system | |
| JP2004336972A (en) | Power supply and power supply control device | |
| KR101759739B1 (en) | Apparatus for determining switch error in bidirectional dc-dc converter and method thereof | |
| JP4037380B2 (en) | Voltage compensator | |
| JPWO2008084617A1 (en) | Control device and control method for power conversion system having instantaneous voltage drop / power failure countermeasure function | |
| US10181738B2 (en) | Discharge control device | |
| JP4845821B2 (en) | Instantaneous voltage drop compensation device | |
| JP2006074916A (en) | Power supply device for queuing dual-system vehicle | |
| KR20190110704A (en) | Precharge system for medium voltage inverter and method for controlling the same | |
| WO2015072009A1 (en) | Bidirectional converter | |
| JP2004135478A (en) | Step-down, step-up compatible dc-dc converter | |
| JP2015136213A (en) | Power converter of electric vehicle | |
| JP6700578B2 (en) | Uninterruptible power system | |
| JP4751306B2 (en) | Electric vehicle power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20080919 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090703 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090714 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090807 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100202 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100222 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100914 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100929 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20110531 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20110613 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 4774961 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140708 Year of fee payment: 3 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |