JPH02262849A - Power supply - Google Patents
Power supplyInfo
- Publication number
- JPH02262849A JPH02262849A JP1016795A JP1679589A JPH02262849A JP H02262849 A JPH02262849 A JP H02262849A JP 1016795 A JP1016795 A JP 1016795A JP 1679589 A JP1679589 A JP 1679589A JP H02262849 A JPH02262849 A JP H02262849A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- load
- power supply
- power
- circuit
- 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
- 230000005856 abnormality Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、他の電源にも接続できる負荷に、インバー
タから交流電力を供給する電源装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device that supplies AC power from an inverter to a load that can also be connected to another power source.
直流電気車は、架線から取入れる直流電力で直流電動機
を回転させることにより走行するのであるが、この直流
電気車には、蛍光灯などの照明装置、車内通信・放送装
置、空調装置など、各種の装置を搭載しているが、これ
らの装置の大部分は交流電力で運転する。そこで、電気
車には直流を交流に変換するインバータを２＆１以上設
置して、これらインバータを前記各装置の電源にしてい
る。DC electric cars run by rotating a DC motor using DC power taken in from overhead wires, but these DC electric cars are equipped with various equipment such as lighting equipment such as fluorescent lights, in-car communication/broadcasting equipment, and air conditioning equipment. The majority of these devices operate on AC power. Therefore, two or more inverters that convert direct current to alternating current are installed in the electric car, and these inverters are used as the power source for each of the above-mentioned devices.
ここで、電気車に搭載している上記の交流負荷は、いく
つかのグループに分割され、各グループごとに別個のイ
ンバータが交流電力を供給する回路構成としている。よ
って、あるインバータが故、障すれば、この故障インバ
ータを切離したのち、正常なインバータがこの負荷に交
流電力を供給する、いわゆ、る延長給電方式を採用する
のが通例である。そのために、電気車には複数のインバ
ータを設置するが、延長給電方式であるため、インバー
タ同士を並列運転する必要はない、それ故、並列運転す
るのに必要な同期検出回路や、負荷分担を平衡させる回
路などは省略でき、電源装置を簡素な構成にすることが
できる。Here, the above-mentioned AC load mounted on the electric vehicle is divided into several groups, and a circuit configuration is adopted in which a separate inverter supplies AC power to each group. Therefore, if an inverter fails or malfunctions, it is customary to disconnect the faulty inverter and then use a so-called extended power supply system in which a normal inverter supplies AC power to the load. For this purpose, multiple inverters are installed in electric cars, but since it is an extended power supply system, there is no need to run the inverters in parallel. Therefore, the synchronization detection circuit and load sharing necessary for parallel operation are A balancing circuit and the like can be omitted, allowing the power supply device to have a simple configuration.
上述のように、複数のインバータを搭載した電気車で、
１台のインバータが故障すれば、他の正常インバータか
ら延長給電により、故障インバータが給電していた負荷
に交流電力を供給するのであるが、故障インバータがノ
イズなどによる一時的な運転中断のような故障の場合に
は、誤ってリセット信号が与えられると、この故障イン
バータと負荷とを切離している開閉器、たとえば電磁接
触器が閉路し、かつ故障で停止していたインバータも起
動しようとする。As mentioned above, electric cars equipped with multiple inverters,
If one inverter fails, AC power is supplied to the load that was being supplied by the failed inverter through extended power supply from other normal inverters, but if the failed inverter is temporarily interrupted due to noise, etc. In the event of a failure, if a reset signal is erroneously applied, a switch, such as an electromagnetic contactor, that separates the failed inverter from the load will close, and the inverter that was stopped due to the failure will also attempt to start up.
すなわち、正常インバータと故障インバータとが並列運
転状態になってしまうのであるが、両インバータは非同
期状態での並列運転であることから、両者とも過電流な
どでトリップして完全に停電となるばかりでなく、両イ
ンバータとも破損する最悪状態となるおそれもある。In other words, the normal inverter and the faulty inverter end up operating in parallel, but since both inverters operate in parallel in an asynchronous state, both may trip due to overcurrent, resulting in a complete power outage. In the worst case, both inverters may be damaged.
そこでこの発明の目的は、一方のインバータ、あるいは
他の電源が負荷に給電中に、他方のインバータがこの負
荷に不用意に給電することで、複数の交流電源が非同期
状態で並列運転する危険を防止することにある。Therefore, an object of the present invention is to prevent multiple AC power supplies from running in parallel in an asynchronous state by inadvertently supplying power to a load while one inverter or another power supply is supplying power to the load. The purpose is to prevent it.
上記の目的を達成するために、この発明の電源装置は、
他の電源からも電力の供給を受けることができる負荷に
、開閉器を介してインバータが出力する交流電力を供給
する装置において、前記負荷の端子電圧を検出する手段
と、前記インバータが正常であるか否かを検出する手段
と、前記負荷が無電圧、かつ前記インバータが正常なら
ば前記開閉器を閉路することができる回路とを備えるも
のとする。In order to achieve the above object, the power supply device of the present invention includes:
A device for supplying alternating current power output from an inverter via a switch to a load that can also receive power from another power source, comprising: means for detecting a terminal voltage of the load; and a device for detecting a terminal voltage of the load; and a circuit that can close the switch if the load is non-voltage and the inverter is normal.
〔作用］
この発明は、負荷の端子電圧を検出し、この電圧が有り
のときは、インバータが運転可能であっても、このイン
バータと負荷との間にある開閉器が閉路しないように回
路を構成し、かつインバータも運転しないようにして、
非同期状態での並列運転を回避するものである。[Operation] This invention detects the terminal voltage of the load, and when this voltage is present, the circuit is configured so that the switch between the inverter and the load does not close even if the inverter is operable. configuration, and also do not operate the inverter.
This avoids parallel operation in an asynchronous state.
第１図は本発明の第１実施例をあられした回路図である
。FIG. 1 is a circuit diagram showing a first embodiment of the present invention.
この第１図において、直流電源２からの直流電力を、４
個のトランジスタスイッチ３１．３２．３３゜３４をブ
リッジ接続し、これらが順次オン・オフ動作することで
得られる交流を、フィルタリアクトル３５ とフィルタ
コンデンサ３６とで正弦波状の交流に変換し、絶縁と変
圧とを兼ねた変圧器３７で交流電力を取出せるように、
インバータ３を構成している。このインバータ３の交流
出力は電磁接触器５を介して負荷６に給電するのである
が、この負荷６が延長給電により、他のインバータから
交流電力を供給されているときに、電磁接触器５が不用
意に閉路して、インバータ３と延長給電回路電源とが非
同期状態で並列運転するのを、下記により防止する。な
お符号４はインバータ３を制御するためのインバータ制
御回路であり、接点４Ａは、このインバータ制御回路が
正常のときに閉路している接点である。In this FIG. 1, the DC power from the DC power supply 2 is 4
Transistor switches 31, 32, 33° 34 are bridge-connected, and the alternating current obtained by turning them on and off sequentially is converted into a sinusoidal alternating current by a filter reactor 35 and a filter capacitor 36. In order to be able to obtain AC power with the transformer 37 which also serves as a transformer,
It constitutes an inverter 3. The AC output of this inverter 3 is supplied to a load 6 via an electromagnetic contactor 5. When this load 6 is being supplied with AC power from another inverter through extended power supply, the electromagnetic contactor 5 The following prevents the inverter 3 and the extension power supply circuit from operating in parallel in an asynchronous state due to inadvertent closing of the circuit. Note that reference numeral 4 is an inverter control circuit for controlling the inverter 3, and contact 4A is a contact that is closed when the inverter control circuit is normal.
負荷６に電圧が印加されているかどうかを検出するべく
、電圧検出リレー１２を負荷６の端子に接続している。A voltage detection relay 12 is connected to a terminal of the load 6 to detect whether or not a voltage is applied to the load 6.
ここで負荷６が延長給電回路から電力供給を受けていな
ければ、当該負荷６は無電圧であるため、電圧検出リレ
ー１２の常時閉接点１２Ｂは閉路したままであり、イン
バータ制御回路４が正常で、接点４Ａが閉路していれば
、接触器コイル１３は電ｔＡ１１ により励磁され、そ
の結果電磁接触器１３は閉路し、負荷６にはインバータ
３から交流電力が給電される。これと同時に接点１３Ａ
が閉路して接触器コイル１３を自己保持するとともに、
インバータ制御回路４に異常を生じて接点４Ａが開路す
れば、接触器コイル１３の自己保持が解けることから、
電磁接触器５は開路して、インバータ３からの給電を停
止にすることができる。If the load 6 is not receiving power from the extension power supply circuit, the load 6 has no voltage, so the normally closed contact 12B of the voltage detection relay 12 remains closed, indicating that the inverter control circuit 4 is normal. If the contact 4A is closed, the contactor coil 13 is excited by the electric current tA11, and as a result, the electromagnetic contactor 13 is closed, and the load 6 is supplied with AC power from the inverter 3. At the same time, contact 13A
is closed to self-hold the contactor coil 13, and
If an abnormality occurs in the inverter control circuit 4 and the contact point 4A opens, the self-retention of the contactor coil 13 will be released.
The electromagnetic contactor 5 can be opened to stop the power supply from the inverter 3.
なお接点１２Ａは、電圧検出リレー１２に連動して、負
荷６が延長給電回路で給電されているときに、インバー
タ３を動作させないように、インバータ制御回路４の内
部に設置している論理回路に信号を与えるために設けて
いる。The contact 12A is linked to the voltage detection relay 12 and is connected to a logic circuit installed inside the inverter control circuit 4 so as not to operate the inverter 3 when the load 6 is being supplied with power by the extended power supply circuit. It is provided to give a signal.
電気車などの車両に搭載しているインバータ３が故障し
た場合、インバータ制御回路４はその故障内容を記憶し
て、外部からのリセット信号が到来するまでは、その運
転は停止状態にするのが通例である。それ故、上述の回
路構成とすることにより、当該インバータ３が故障→接
点４Ａが開路→電磁接触器５開路（これと同時にインバ
ータ３は停止）→負荷６は延長給電回路から受電となっ
た場合に、誤ってインバータ制御回路４にリセット信号
が与えられても、電圧検出リレー１２は既に励磁されて
、接点１２Ｂが開路しているので、接触器コイル１３は
励磁されるおそれはなく、従って電磁接触器５は閉路せ
ず、このインバータ３が正常であっても、延長給電回路
から負荷６への給電を妨害するおそれはない。When the inverter 3 installed in a vehicle such as an electric car fails, the inverter control circuit 4 memorizes the details of the failure and stops its operation until a reset signal arrives from the outside. It is customary. Therefore, by using the above circuit configuration, if the inverter 3 fails → contact 4A opens → electromagnetic contactor 5 opens (simultaneously, inverter 3 stops) → load 6 receives power from the extended power supply circuit. Even if a reset signal is accidentally given to the inverter control circuit 4, the voltage detection relay 12 is already energized and the contact 12B is open, so there is no risk of the contactor coil 13 being energized, and therefore the electromagnetic The contactor 5 does not close, and even if the inverter 3 is normal, there is no risk of interfering with the power supply from the extended power supply circuit to the load 6.
第２図は本発明の第２実施例をあられした回路図である
。FIG. 2 is a circuit diagram showing a second embodiment of the present invention.
この第２図に示している直流電源２、インバータ３とこ
のインバータ３を構成しているトランジスタスイッチ３
１．３２．３３．３４ とフィルタリアクトル３５とフ
ィルタコンデンサ３６および変圧器３７、インバータ制
御回路４、電磁接触器５、負荷６ならびに接触器コイル
１３は、第１図において既述の第１実施例回路のものと
、その用途・名称・機能は同じであることから、これら
の説明は省略する。A DC power supply 2, an inverter 3, and a transistor switch 3 making up the inverter 3 shown in FIG.
1.32.33.34, the filter reactor 35, the filter capacitor 36, the transformer 37, the inverter control circuit 4, the electromagnetic contactor 5, the load 6, and the contactor coil 13 of the first embodiment already described in FIG. Since their uses, names, and functions are the same as those of the circuit, their explanation will be omitted.
この第２図に示す第２実施例は、無接点で回路を構成し
たものであって、負荷６の端子に接続している電圧検出
回路２０は変圧器２１ と整流器２２およびコンパレー
タ２３ とで構成して、この電圧検出回路２０の出力を
論理和素子２４ と論理積素子２５とを介してトランジ
スタで構成した電子スイッチ２６に与えるようにしてい
る。The second embodiment shown in FIG. 2 has a non-contact circuit, and the voltage detection circuit 20 connected to the terminals of the load 6 is composed of a transformer 21, a rectifier 22, and a comparator 23. Then, the output of this voltage detection circuit 20 is applied via an OR element 24 and an AND element 25 to an electronic switch 26 constituted by a transistor.
すなわち、負荷６の端子電圧が零のとき、コンパレータ
２３は論理Ｈ信号を出力する。またインバータ制御回路
４も正常時に論理Ｈ信号を出力するので、このとき電子
スイッチ２６が導通して、電源１１により接触器コイル
１３を励磁してｉｔ電磁接触器を閉路する。That is, when the terminal voltage of the load 6 is zero, the comparator 23 outputs a logic H signal. Furthermore, since the inverter control circuit 4 also outputs a logic H signal during normal operation, the electronic switch 26 becomes conductive at this time, and the contactor coil 13 is excited by the power supply 11 to close the IT electromagnetic contactor.
この発明によれば、負荷に延長給電回路から電力が供給
されているのを検出すれば、たとえインバータが正常で
あっても、延長給電中はこの負荷へインバータから給電
できないように回路を構成しているので、このインバー
タが非同期状態で他の電源と並列運転し、その結果過電
流トリップや装置の破損などの事故が生じるのを未然に
防止できる効果が得られる。According to this invention, if it is detected that power is being supplied to the load from the extended power supply circuit, the circuit is configured so that the inverter cannot supply power to the load during the extended power supply, even if the inverter is normal. Therefore, it is possible to prevent the inverter from operating in parallel with other power sources in an asynchronous state, thereby preventing accidents such as overcurrent trips and equipment damage.
第１図は本発明の第１実施例をあられした回路図、第２
図は本発明の第２実施例をあられした回路図である。Figure 1 is a circuit diagram showing the first embodiment of the present invention;
The figure is a circuit diagram showing a second embodiment of the present invention.
Claims (1)
荷に、開閉器を介してインバータが出力する交流電力を
供給する装置において、前記負荷の端子電圧を検出する
手段と、前記インバータが正常であるか否かを検出する
手段と、前記負荷が無電圧、かつ前記インバータが正常
ならば前記開閉器を閉路することができる回路とを備え
ていることを特徴とする電源装置。1) In a device that supplies AC power output from an inverter via a switch to a load that can also receive power from another power source, the device includes means for detecting terminal voltage of the load, and a means for detecting a terminal voltage of the load, and a means for detecting a terminal voltage of the load, and a means for detecting the terminal voltage of the load, 1. A power supply device comprising: means for detecting whether or not the load is energized; and a circuit capable of closing the switch if the load is non-voltage and the inverter is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016795A JP2841412B2 (en) | 1989-01-26 | 1989-01-26 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016795A JP2841412B2 (en) | 1989-01-26 | 1989-01-26 | Power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02262849A true JPH02262849A (en) | 1990-10-25 |
| JP2841412B2 JP2841412B2 (en) | 1998-12-24 |
Family
ID=11926101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1016795A Expired - Lifetime JP2841412B2 (en) | 1989-01-26 | 1989-01-26 | Power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2841412B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005287175A (en) * | 2004-03-30 | 2005-10-13 | Lecip Corp | Uninterruptible power supply device and its control method |
| JP2009071977A (en) * | 2007-09-13 | 2009-04-02 | Tokyo Electric Power Co Inc:The | Power relay apparatus and power supply unit |
| JP2012244741A (en) * | 2011-05-18 | 2012-12-10 | Omron Corp | Power conditioner |
| JP2013085411A (en) * | 2011-10-12 | 2013-05-09 | Mitsubishi Electric Corp | System interconnection power conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5158605U (en) * | 1974-10-30 | 1976-05-08 | ||
| JPS6073335U (en) * | 1983-10-21 | 1985-05-23 | 北芝電機株式会社 | Three series power supply automatic switching device |
-
1989
- 1989-01-26 JP JP1016795A patent/JP2841412B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5158605U (en) * | 1974-10-30 | 1976-05-08 | ||
| JPS6073335U (en) * | 1983-10-21 | 1985-05-23 | 北芝電機株式会社 | Three series power supply automatic switching device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005287175A (en) * | 2004-03-30 | 2005-10-13 | Lecip Corp | Uninterruptible power supply device and its control method |
| JP4564274B2 (en) * | 2004-03-30 | 2010-10-20 | レシップ株式会社 | Uninterruptible power supply and control method thereof |
| JP2009071977A (en) * | 2007-09-13 | 2009-04-02 | Tokyo Electric Power Co Inc:The | Power relay apparatus and power supply unit |
| JP2012244741A (en) * | 2011-05-18 | 2012-12-10 | Omron Corp | Power conditioner |
| JP2013085411A (en) * | 2011-10-12 | 2013-05-09 | Mitsubishi Electric Corp | System interconnection power conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2841412B2 (en) | 1998-12-24 |
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