KR101594394B1 - Asynchronous Uninterruptible Automatic Transfer Switches - Google Patents

Asynchronous Uninterruptible Automatic Transfer Switches Download PDF

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Publication number
KR101594394B1
KR101594394B1 KR1020150115153A KR20150115153A KR101594394B1 KR 101594394 B1 KR101594394 B1 KR 101594394B1 KR 1020150115153 A KR1020150115153 A KR 1020150115153A KR 20150115153 A KR20150115153 A KR 20150115153A KR 101594394 B1 KR101594394 B1 KR 101594394B1
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KR
South Korea
Prior art keywords
power
power source
switch
power supply
line
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KR1020150115153A
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Korean (ko)
Inventor
염종현
조요한
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(주)에프티글로벌
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems

Abstract

The present invention relates to an asynchronous uninterruptible automatic switching device. The asynchronous uninterruptible automatic switching device according to the present invention comprises: a first power source voltage sensing unit for sensing a voltage on a first power source line which is connected with a first power source; a second power source voltage sensing unit for sensing a voltage on a second power source line which is connected with a second power source; a first power source switching unit which is connected with the first power source line and performs switching on the first power source which is supplied to a load; a second switching unit which is connected with the second power source line and performs switching on the second power source which is supplied to the load; a switching operation sensing unit for sensing the operation of the first power source switching unit and the second power source switching unit; and a control unit which receives sensing signals from the first power source voltage sensing unit, the second power source voltage sensing unit, and the switching operation sensing unit to determine a power supply failure of the first power source and the second power source, and controls the switching operation of the first power source and the second power source in an asynchronous manner irrespective of whether the first power source has in-phase with the second power source, such that one of the first power source and the second power source is supplied to the load. Each of the first power source line and the second power source line includes at least one phase line and a neutral line. Each of the first power source switching unit and the second power source switching unit includes a switch connected with the at least one phase line and a switch connected with the neutral line. According to the present invention, the power sources can be stably switched even at an asynchronous state irrespective of whether phases of the power sources are matched or not.

Description

[0001] Asynchronous Uninterruptible Automatic Transfer Switches [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asynchronous automatic uninterruptible power automatic switching system, and more particularly, to an apparatus for automatically switching a power source asynchronously regardless of whether phases of respective power sources are coincident or not.

It is a reality that momentary voltage drop and momentary power failure are often generated in an industrial field. This unstable state of the momentary power is caused by a short circuit in the power system, a lightning strike, and the like. The voltage, which occurs in a very short time in a PLC, an electromagnetic switch, a relay, The failure is caused by the deterioration, which stops the operation of the factory production facilities and causes enormous economic damage.

In order to solve this problem, the uninterruptible power switch is used in the industrial field, the enterprise and the government office to make the load equipment stable from the instantaneous voltage drop, the instantaneous voltage swell, the instantaneous interruption, Power supply.

1 is a block diagram of a conventional synchronous uninterruptible automatic switching system. Referring to FIG. 1, a conventional uninterruptible automatic switcher includes a first phase detector 100, a second phase detector 200, a switching condition determiner 300, an SCR driver 400, a first SCR 500, And a second SCR (600).

The first phase sensing unit 100 and the second phase sensing unit 200 sense the phase of the power supply voltage supplied from the power supply and provide the phase to the switching condition determining unit 300. The switching condition determining unit 300 determines a switching condition such as whether the phase is in phase at the time of power failure based on the signals output from the first phase sensing unit 100 and the second phase sensing unit 200 and then outputs a switching signal to the SCR driving unit do.

As shown in FIG. 1, the conventional synchronous uninterruptible power automatic switcher is a system in which only middle lines are commonly connected among the respective power sources, and only the commercial lines are switched. Therefore, when the switching is performed in a state that is not in phase, the SCR is broken due to the transient current flowing in the uninterruptible switch when the switching is performed in the non-inphase state. And operates so as not to be switched when the phase is not the same.

Therefore, if unstable power is supplied to the power line supplied to the lower stage when the uninterruptible power supply is not in phase, an unstable power source lower than or higher than the reference voltage is supplied due to an accident of the power system, the stable power line can not be switched, One power source is continuously supplied, leading to malfunction and failure of the load equipment.

In order to solve the above-described problems, it is an object of the present invention to provide an asynchronous automatic unlocking automatic switching device capable of switching power regardless of whether phases of respective power sources are coincident or not. In addition, an asynchronous uninterruptible automatic switching device capable of switching power simultaneously by providing a switch in each of the neutral line and the commercial line, switching control at the same time, sensing the switching turn-off time according to the switching operation, The purpose is to provide.

The above object of the present invention is achieved by an asynchronous instantaneous power switching apparatus for transmitting either a first power supply or a second power supply to a load, comprising: a first power supply voltage sensing unit for sensing a voltage of a first power supply line connected to the first power supply; ; A second power supply voltage sensing unit for sensing a voltage of a second power supply line connected to the second power supply; A first power switching unit connected to the first power line to switch the first power supplied to the load side; A second power switching unit connected to the second power supply line for switching the second power supply to the load side; A switching operation sensing unit for sensing an operation of the first power switching unit and the second power switching unit; And a controller for receiving a detection signal from the first power supply voltage sensing unit, the second power supply voltage sensing unit, and the switching operation sensing unit to determine whether the first power supply and the second power supply are abnormal or not, The first power switching unit and the second power switching unit controls the switching operation of the first power switching unit and the second power switching unit asynchronously regardless of whether the power source and the second power source are in phase with each other to supply either the first power source or the second power source And a control unit for controlling the control unit Wherein the first power supply line and the second power supply line each include at least one normal line and a neutral line, the first power supply switching unit and the second power supply switching unit are respectively connected to the switch connected to the at least one commercial line and the switch connected to the neutral line And an asynchronous automatic unlocking automatic switching device characterized by comprising a switch.

The first power switching unit may include a first power switch connected to the first power line and a first power switch driving unit driving the first power switch, The second power switching unit may include a second power switch connected to the second power line and a second power switch driver for driving the second power switch.

Further, the first power supply line and the second power supply line may be three-phase four-wire type, the first power switch may include a first switch connected to an R-phase power supply line of the first power supply, A third switch connected to the T phase power line of the first power source, and a fourth switch connected to a neutral line of the first power source, the second power switch being connected to the neutral line of the first power source, A sixth switch connected to the S phase power line of the second power source, a seventh switch connected to the T phase power line of the second power source, And an eighth switch connected to the neutral line of the second switch.

The first power switch and the second power switch may include a silicon-controlled rectifier (SCR).

In addition, the control unit may control the first and second power switching units and the second power switching unit in an asynchronous state with a predetermined time interval based on a sensing signal regarding the turn-off timing of the silicon control rectifier from the switching operation sensing unit. It is possible to output a switching control signal.

As described above, the asynchronous automatic uninterruptible power automatic switching system according to the present invention can switch the power regardless of the phase of each power source. Also, the power can be switched stably even in the asynchronous state without the point where the two power sources overlap each other.

1 is a block diagram of a conventional synchronous uninterruptible automatic switching system.
2 is a block diagram of an asynchronous uninterruptible automatic switching system according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

2 is a block diagram of an asynchronous uninterruptible automatic switching system according to an embodiment of the present invention. The asynchronous automatic unlocking automatic switching apparatus according to an embodiment of the present invention is an apparatus for asynchronously switching a first power source and a second power source supplied from different transmission sides to supply power to the load uninterruptedly, Refers to different commercial power supply, emergency power supply, generator power supply, uninterruptible power supply, and other substation power supply. When power supply is out of order, power is supplied in a steady state regardless of the synchronous state, asynchronous state or phase of each power supply. Switch.

Referring to FIG. 2, the asynchronous automatic uninterruptible power automatic switching system according to an embodiment of the present invention includes a first power voltage detecting unit 10, a second power voltage detecting unit 20, a first power switching unit 30, 2 power supply switching unit 40, a switching operation sensing unit 50, and a control unit 60. [

2, the three-phase four-wire distribution system is shown as a power supply line for the first power supply and the second power supply. However, the present invention can be applied to other distribution systems such as a single-phase two-wire system.

The first power source is connected to the first power source line 1 and the second power source is connected to the second power source line 2. The power source includes at least one main line and a neutral line. Can be different.

2, the first power supply line 1 and the second power supply line 2 are constituted by four lines of R, S, and T phases, which are three phase lines, and a total of four neutral lines (N), respectively. do

The first power supply voltage sensing unit 10 and the second power supply voltage sensing unit 20 are connected to the first power supply line 1 and the second power supply line 2 at the input stage. The first power supply voltage sensing unit 10 and the second power supply voltage sensing unit 20 sense voltages of the first power supply and the second power supply, respectively, and output the sensed voltages to a controller 60 to be described later.

The first power supply switching unit 30 is connected to the first power supply line 1 to interrupt the first power supply supplied to the load and includes a first power switch 31 connected to the first power supply line 1, And a first power switch driver 33 for driving the first power switch 31.

Likewise, the second power switching unit 40 is connected to the second power supply line 2 for interrupting the second power supplied to the load, and the second power switch 41 connected to the second power supply line 2 And a second power switch driver 43 for driving the second power switch 41.

The first power switch driving part 33 and the second power switch driving part 43 control the opening and closing of the first power switch 31 and the second power switch 41 in accordance with a control signal from the control part 60 do.

Since the first power supply line 1 and the second power supply line 2 are three-phase four-wire type, the first power supply switch 31 and the second power supply switch 41 are connected to four lines It is installed in all.

Specifically, the first power switch 31 includes a first switch 31a connected to the R-phase power line of the first power source, a second switch 31b connected to the S-phase power line, A third switch 31c and a fourth switch 31d connected to the neutral line. The second power switch 41 includes a fifth switch 41a connected to the R phase power line of the second power source, A sixth switch 41b connected to the line, a seventh switch 41c connected to the T phase power line, and an eighth switch 41d connected to the neutral line.

Here, as the first switches 31a to 31d to the eighth switches 41a to 41d, a silicon controlled rectifier (SCR) may be used. Since the time for each power supply line to be switched is very fast for the uninterruptible operation of the load, the silicon controlled rectifier (SCR) driven by a contactless point can be supplied continuously without powering off the load. However, the first power switch 31 and the second power switch 41 according to the present invention are not limited to the silicon controlled rectifier. The first power switch 31 and the second power switch 41 according to the present invention are driven by the non- It is needless to say that other switching elements can be applied as long as they have durability against commercial power supply of the present invention.

The first power switch driving part 33 and the second power switch driving part 43 receive the signal of the control part 60 to turn on or turn off the first power switch 31 simultaneously, The fourth power switch 41 is turned on or off to switch the power supplied to the load.

In the present invention, since the middle line between the first power supply line 1 and the second power supply line 2 is not commonly connected to each other but is separately separated by the fourth switch 31d and the eighth switch 41d , There is no fear that a transient current will flow inside the switch for the step-up operation at the time of switching, so that the power can be switched stably regardless of the phase.

The switching operation sensing unit 50 senses the operation of the first power switching unit 30 and the second power switching unit 40 and includes a first power switching unit 30 and a second power switching unit 40, And detects the turn-off time of the switch, and outputs the detected time to the control unit 60.

The switching operation sensing unit 50 has a characteristic that the forward current is turned off only when the forward current is lower than the holding current irrespective of the turn-off gate signal of the silicon control rectifier (SCR) And outputs the detected time to the control unit 60.

The control unit 60 receives a sensing signal from the first power supply voltage sensing unit 10, the second power supply voltage sensing unit 20 and the switching operation sensing unit 50 and receives a sensing signal from the first power supply and the second power supply And outputs a switching control signal to the first power switching unit 30 and the second power switching unit 40 asynchronously regardless of whether the first power source and the second power source are in phase or not, So that either the first power supply or the second power supply is stably supplied.

For example, when an abnormality occurs in the supply of the first power source due to a power failure or the like, the control unit 60 determines whether the first power source is abnormal based on the detection signals of the first power source voltage detection unit 10 and the switching operation detection unit 50 The first power switching unit 30 is turned off and the second power switching unit 40 is turned on so that the power supply to the load side is not interrupted and the first power source is switched from the first power source to the second power source .

The control unit 60 continuously scans the signals of the first power supply voltage sensing unit 10 and the second power supply voltage sensing unit 20 and switches the power supply line to a stable power supply line, Off timing of the silicon controlled rectifier (SCR) from the switching operation sensing part 50 and applies a turn-off gate signal of a phase angle of 90 ° to 180 °, for example, 100 °, And the switching signal is switched by giving an interval of 0.5 to 1 ms so as to be stably switched even in the asynchronous state and to detect whether the stable power is supplied to the lower stage by detecting the output power.

As described above, in the asynchronous automatic unlocking automatic switching system according to the present invention, a switching element is provided in a middle line and a vertical line and a switching is made at the same time, so that the switching is performed by giving an interval of 0.5 to 1 ms without overlapping even in an asynchronous state, It is possible to switch between manual and automatic even in the asynchronous state, so that it is possible to continuously supply good quality power to the lower stage.

In addition, unlike the conventional synchronous uninterruptible power automatic switching system, there is no need for phase detection means for confirming synchronization state establishment, which is economical.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. Lt; / RTI >

Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: first power supply voltage sensing unit 20: second power supply voltage sensing unit
30: first power switching unit 31: first power switch
33: first power switch driving part 40: second power switching part
41: second power switch 43: second power switch drive part
50: switching operation detecting unit 60:

Claims (5)

An asynchronous uninterruptible automatic switching system for transmitting either a first power source or a second power source to a load side,
A first power supply voltage sensing unit for sensing a voltage of a first power supply line connected to the first power supply;
A second power supply voltage sensing unit for sensing a voltage of a second power supply line connected to the second power supply;
A first power switching unit connected to the first power line to switch the first power supplied to the load side;
A second power switching unit connected to the second power supply line for switching the second power supply to the load side;
A switching operation sensing unit for sensing an operation of the first power switching unit and the second power switching unit; And
Wherein the control unit receives a detection signal from the first power supply voltage sensing unit, the second power supply voltage sensing unit, and the switching operation sensing unit to determine whether the power supply of the first power supply and the second power supply is abnormal, The first power switching unit and the second power switching unit controls the switching operation of the first power switching unit and the second power switching unit asynchronously regardless of whether the second power source is in phase or not so as to supply either the first power source or the second power source to the load side A control unit for controlling the control unit;
Wherein the first power switching unit includes a first power switch connected to the first power line and a first power switch driving unit driving the first power switch;
The second power switching unit includes a second power switch connected to the second power line and a second power switch driving unit for driving the second power switch;
Wherein the first power supply line and the second power supply line are three-phase four-wire type, the first power switch is connected to the R phase power supply line of the first power supply, the first switch is connected to the S phase power supply line of the first power supply, And a fourth switch connected to the neutral line of the first power source, wherein the second power switch is connected to the second power source of the second power source, A fifth switch connected to the R phase power supply line, a sixth switch connected to the S phase power line of the second power source, a seventh switch connected to the T phase power line of the second power source, And an eighth switch connected to the first switch,
Wherein the neutral line of the first power source and the neutral line of the second power source are separated separately by the fourth switch and the eighth switch.
delete delete The method according to claim 1,
Wherein the first power switch and the second power switch include a silicon-controlled rectifier (SCR).
5. The method of claim 4,
The control unit applies a turn-off gate signal to the silicon controlled rectifier (SCR) at a specific phase angle, and controls the turn-off time of the silicon controlled rectifier And outputs a switching control signal to the first power switching unit and the second power switching unit in an asynchronous state with an interval between the first power switching unit and the second power switching unit.
KR1020150115153A 2015-08-17 2015-08-17 Asynchronous Uninterruptible Automatic Transfer Switches KR101594394B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180113412A (en) * 2017-04-06 2018-10-16 조효식 Power Connecting Apparatus
KR102126209B1 (en) * 2018-12-19 2020-06-24 (주)신아이엔지 Source transfer switch with overcurrent protection
KR20210147738A (en) * 2020-05-29 2021-12-07 (주)진광전기 Redundant Power Supply Equipped with a Switching Method and System using a Light-emitting and Light-receiving Element
KR102510108B1 (en) 2022-11-04 2023-03-14 주식회사 이온 Uninterruptible power supply
KR102599331B1 (en) * 2023-05-19 2023-11-07 주식회사 디케이 Apparatus for emergency lighting control

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080058305A (en) * 2008-05-07 2008-06-25 이병호 Igbt electric divide type u.p.s
KR20080079042A (en) * 2007-02-26 2008-08-29 (주)미광-케이아이 Supply apparatus of an emergency power source
KR101079900B1 (en) * 2007-10-31 2011-11-04 주식회사 케이티 Static transfer switch device, power supply apparatus using the switch device and switching method thereof
KR20130012304A (en) * 2011-07-25 2013-02-04 와이피피 주식회사 Uninterruptible power supply system and parallel operating method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080079042A (en) * 2007-02-26 2008-08-29 (주)미광-케이아이 Supply apparatus of an emergency power source
KR101079900B1 (en) * 2007-10-31 2011-11-04 주식회사 케이티 Static transfer switch device, power supply apparatus using the switch device and switching method thereof
KR20080058305A (en) * 2008-05-07 2008-06-25 이병호 Igbt electric divide type u.p.s
KR20130012304A (en) * 2011-07-25 2013-02-04 와이피피 주식회사 Uninterruptible power supply system and parallel operating method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180113412A (en) * 2017-04-06 2018-10-16 조효식 Power Connecting Apparatus
KR101947261B1 (en) 2017-04-06 2019-02-12 조효식 Power Connecting Apparatus
KR102126209B1 (en) * 2018-12-19 2020-06-24 (주)신아이엔지 Source transfer switch with overcurrent protection
KR20210147738A (en) * 2020-05-29 2021-12-07 (주)진광전기 Redundant Power Supply Equipped with a Switching Method and System using a Light-emitting and Light-receiving Element
KR102361171B1 (en) 2020-05-29 2022-02-10 (주)진광전기 Redundant Power Supply Equipped with a Switching Method and System using a Light-emitting and Light-receiving Element
KR102510108B1 (en) 2022-11-04 2023-03-14 주식회사 이온 Uninterruptible power supply
KR102599331B1 (en) * 2023-05-19 2023-11-07 주식회사 디케이 Apparatus for emergency lighting control

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