KR20170033644A - Structure of generator and uninterruptible power system - Google Patents

Structure of generator and uninterruptible power system Download PDF

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Publication number
KR20170033644A
KR20170033644A KR1020150131642A KR20150131642A KR20170033644A KR 20170033644 A KR20170033644 A KR 20170033644A KR 1020150131642 A KR1020150131642 A KR 1020150131642A KR 20150131642 A KR20150131642 A KR 20150131642A KR 20170033644 A KR20170033644 A KR 20170033644A
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KR
South Korea
Prior art keywords
power supply
generator
switch
uninterruptible power
load
Prior art date
Application number
KR1020150131642A
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Korean (ko)
Inventor
배찬식
Original Assignee
주식회사 한강기전
배찬식
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Publication date
Application filed by 주식회사 한강기전, 배찬식 filed Critical 주식회사 한강기전
Priority to KR1020150131642A priority Critical patent/KR20170033644A/en
Publication of KR20170033644A publication Critical patent/KR20170033644A/en

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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
    • H02J9/066—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 characterised by the use of dynamo-electric machines
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1415—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle with a generator driven by a prime mover other than the motor of a vehicle
    • 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
    • H02J9/002—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which a reserve is maintained in an energy source by disconnecting non-critical loads, e.g. maintaining a reserve of charge in a vehicle battery for starting an engine
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

A control method of a generator and uninterruptible power supply connection structure including a bypass for bypassing an uninterruptible power supply and supplying power to a load is disclosed. A control method according to an embodiment of the present invention includes the steps of activating a generator when a fault occurs in a commercial power source, switching an automatic transfer switch (ATS) to a generator side, connecting an uninterruptible power supply Turning on the second switch included in the bypass that turns off the first switch and bypasses the uninterruptible power supply to couple the generator to the load.

Description

[0001] STRUCTURE OF GENERATOR AND UNINTERRUPTIBLE POWER SYSTEM [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator and an uninterruptible power supply, and more particularly, to a generator and an uninterruptible power supply that can stably supply power to a lower stage regardless of the capacity of the generator.

The uninterruptible power supply system (UPS) is a device that supplies good quality stable AC power overcoming the power failure that can occur in commercial power supply. The uninterruptible power supply system supplies normal power to the load side in the event of a power outage or an input power failure. Due to recent development of computer industry equipment, it is required to supply high quality power from the load side. It is widely used for supplying the best power.

Such an uninterruptible power supply includes a power electronic device, which is inevitably accompanied by the generation of harmonics as a source of harmonics. Harmonic current not only causes a voltage drop due to the impedance from the power source to the terminal end, but also affects the generator connected to the uninterruptible power supply.

1 is a view for explaining a connection structure between a generator and an uninterruptible power supply according to the related art.

When a failure occurs in the commercial power supply 11 in the connection structure between the generator and the uninterruptible power supply according to the related art, an automatic transfer switch (ATS) 12 is transferred to the generator 10 side.

At this time, the generator 10 supplies power to the load 16 through the rectifier 13 and the inverter 15. The power is supplied to the load 16 by the power elements of the uninterruptible power supply generating the harmonics, , The output waveform of the generator 10 does not maintain the sinusoidal wave, and the output waveform is distorted.

Specifically, the harmonics generated from the uninterruptible power supply unit are returned to the generator 10, which is an input terminal, to distort the output voltage of the generator 10, thereby greatly reducing the efficiency of the uninterruptible power supply unit and seriously affecting other equipment. do. Such waveform distortion may cause damage to equipment, malfunction of various relays, and malfunction of precision electronic equipment.

Therefore, in order to stably supply power to the load 16 without distortion of the output waveform when the commercial power supply fails, the capacity of the generator 10 should be 1.5 to 2 times the capacity of the uninterruptible power supply.

If the above conditions are not satisfied, the previously installed generator 10 and the uninterruptible power supply can not normally be used. In addition, there has been a problem in that, if the equipment needs to be changed to the installed generator 10 or the uninterruptible power supply so as to satisfy the above-mentioned condition, excessive cost is incurred and the equipment can not be changed unless sufficient space is provided.

Therefore, there is a need for a new generator driving method capable of stably operating the generator and the uninterruptible power supply.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a power supply apparatus and a power supply apparatus, which are capable of stably supplying power to a lower stage even when a generator does not satisfy a predetermined condition And to provide a connection structure of the generator and the uninterruptible power supply.

The technical objects of the present invention are not limited to the above-mentioned technical problems, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

A control method of a generator and an uninterruptible power supply connection structure including a bypass for bypassing an uninterruptible power supply and supplying power to a load according to an embodiment of the present invention includes: , Switching an automatic transfer switch (ATS) to the generator side, turning off the first switch connecting the uninterruptible power supply and the load, bypassing the uninterruptible power supply, And turning on the second switch included in the bypass connected to the load.

According to an embodiment of the present invention, the step of switching the automatic change-over switch to the generator side may include turning off the charge mode of the uninterruptible power supply when the automatic switch is switched to the generator side have.

According to an embodiment of the present invention, there is provided a method of controlling an electronic apparatus, comprising: turning off the second switch and turning on the first switch when a fault generated in the commercial power is removed; The method comprising the steps of:

According to an embodiment of the present invention, when the automatic switch is switched to the commercial power supply, the charging mode of the uninterruptible power supply may be turned on.

The connection structure of the generator and the uninterruptible power supply according to another embodiment of the present invention includes an automatic switch for switching one of a commercial power supply and a generator to be supplied to a load, An uninterruptible power supply for supplying electric energy stored in the battery to the load, a bypass connected to the uninterruptible power supply by bypassing the uninterruptible power supply, a first switch for connecting the uninterruptible power supply to the load, And a second switch included in the bypass.

According to an embodiment of the present invention, when the commercial power supply fails, the automatic switchover switch is switched to the generator, the first switch is turned off, and the second switch can be turned on.

According to an embodiment of the present invention, the uninterruptible power supply may turn off the charging mode when the automatic switch is switched to the generator.

According to an embodiment of the present invention, when the fault generated in the commercial power supply is removed, the first switch is turned on and the second switch is turned off, and the automatic switch is switched to the commercial power supply side .

According to an embodiment of the present invention, the uninterruptible power supply may turn on the charging mode when the automatic switch is switched to the commercial power supply.

According to the control structure of the generator and the uninterruptible power supply according to the embodiment of the present invention, the influence of harmonics due to the power element of the uninterruptible power supply can be eliminated, The power supply can be stably supplied to the load even if it is not exceeded 1.5 to 2 times.

1 is a view for explaining a connection structure between a generator and an uninterruptible power supply according to the related art.
FIG. 2 is a view for explaining a connection structure of a generator and an uninterruptible power supply when an auxiliary terminal receives power from a commercial power supply according to an embodiment of the present invention. Referring to FIG.
3 is a diagram for explaining a process in which a failure occurs in the commercial power supply and the automatic switch is transferred to the emergency power source according to an embodiment of the present invention.
4 is a diagram illustrating a process of supplying power to a load after a generator is driven according to an embodiment of the present invention.
5 illustrates a process of switching a switch before switching the automatic switch to the commercial power supply side according to an embodiment of the present invention.
6 is a view for explaining a process in which the automatic switch is transferred to the commercial power supply side according to an embodiment of the present invention.
7 is a view for explaining a connection structure of a generator and an uninterruptible power supply according to another embodiment of the present invention.
8 is a flowchart illustrating a method of controlling a generator and an uninterruptible power supply according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

Also, the singular forms herein may include plural forms unless specifically stated in the text. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

FIG. 2 is a view for explaining a connection structure of a generator and an uninterruptible power supply when an auxiliary terminal receives power from a commercial power supply according to an embodiment of the present invention. Referring to FIG.

The commercial power source 120 means a power source supplied from the outside. In the normal state, the automatic transfer switch (ATS) 130 is switched to the commercial power supply 120 side so that the load 170 can receive power from the commercial power supply 120.

The charging mode of the uninterruptible power supply 140 is also activated while the automatic switch 130 is switched to the commercial power supply 120 so that the battery 143 To be charged.

The first switch 160 for connecting the uninterruptible power supply 140 and the load 170 is turned on and the load 170 is normally supplied with the power 170 while the automatic switch 130 is switched to the commercial power supply 120. [ .

Meanwhile, the connection structure of the generator and the uninterruptible power supply according to an embodiment of the present invention includes a bypass 180 bypassing the uninterruptible power supply 140. The second switch 150 that connects the load 170 and the automatic switch 130 via the bypass 180 maintains the turn-off state while power is supplied from the commercial power source 120.

Hereinafter, a process of supplying power to the load 170 when a fault occurs in the commercial power supply 120 will be described.

3 is a diagram for explaining a process in which a failure occurs in the commercial power supply and the automatic switch is transferred to the emergency power source according to an embodiment of the present invention.

When a failure occurs in the commercial power source 120, it means that a power failure occurs and a power source other than the current power source is supplied, including noise, even if the power source is cut off or the power source is supplied.

In this case, the generator 110 is operated to supply stable power to the load 170, and the automatic switch 130 is switched to the generator 110 side.

Also, since the power source is disconnected from the commercial power source 120, the charging mode of the uninterruptible power supply unit 140 is also turned off.

The electric energy stored in the battery 143 is supplied to the load 170 before the generator 110 is operated and the automatic switch 130 is switched to the generator 110 so that the generator 110 supplies power to the load 170. [ . More specifically, the electric energy stored in the battery 143 is supplied to the load 170 via the inverter 142.

Accordingly, the load 170 can be stably supplied with power even when the commercial power supply 120 fails.

4 is a diagram illustrating a process of supplying power to a load after a generator is driven according to an embodiment of the present invention.

When the generator 110 is normally driven, the electric energy produced by the generator 110 is supplied to the load 170. Specifically, the first switch 160 connecting the uninterruptible power supply 140 and the load 170 is turned off and the second switch 150 is turned on.

The automatic switching switch 130 is switched to the generator 110 so that the electric energy generated by the generator 110 is supplied to the load 170 through the automatic switch 130 and the bypass 180. [

That is, since the first switch 160 connecting the uninterruptible power supply 160 and the load 170 is turned off and the generator 110 is connected to the load 170 via the bypass 180, Power is supplied to the load 170 without passing through the power device of the device 160. [

Therefore, since the generator 110 is not affected by the harmonics generated by the power element of the uninterruptible power supply 160, the capacity of the generator 110 does not exceed the capacity of the uninterruptible power supply 160 by 1.5 to 2 times The effect that the power can be stably supplied to the load 170 can be achieved.

For example, when the uninterruptible power supply 140 is installed in a state where the generator 110 is installed, or when the generator 110 is installed in a state where the uninterruptible power supply 140 is installed, It is possible to achieve the effect that the generator 110 or the uninterruptible power supply 140 having the optimum capacity can be installed without being restricted by the conditions according to the correlation of the supply device 140. [

Hereinafter, a process in which the power supply source changes from the generator 110 to the commercial power supply 120 due to the failure of the commercial power supply 120 is explained.

5 illustrates a process of switching a switch before switching the automatic switch to the commercial power supply side according to an embodiment of the present invention.

A series of procedures are performed to cause the commercial power supply 120 to supply power to the load 170 when the trouble generated in the commercial power supply 120 is released. The generator 110 is a means for supplying power to the load 170 for a limited period of time so that the commercial power supply 120 supplies power to the load 170 when the generated power is removed.

The second switch 150 connecting the load 170 and the generator 110 via the bypass 180 is turned off and the uninterruptible power supply 120 is turned on when the fault occurs in the commercial power supply 120 according to an embodiment of the present invention, The first switch 160 connecting the device 140 and the load 170 is turned on.

The reason why the first switch 160 is turned on before the automatic switch 130 is switched to the commercial power 120 is because the automatic switch 130 is switched to the uninterruptible power supply So that the electric energy of the battery 143 stored in the battery 140 is supplied to the load 170.

When the first switch 160 is turned on, the electric energy stored in the battery of the uninterruptible power supply 140 is supplied to the load 170 via the inverter 142. At this time, since the charging mode of the uninterruptible power supply 140 is off, no power is supplied from the generator 110 to the uninterruptible power supply 140.

Therefore, it is possible to prevent the effect that the generator 110 is affected by the power element of the uninterruptible power supply 140 and the output waveform is distorted in advance.

6 is a view for explaining a process in which the automatic switch is transferred to the commercial power supply side according to an embodiment of the present invention.

The automatic switch 130 is switched to the commercial power source 120 side when the trouble generated in the commercial power source 110 is eliminated. In addition, the generator 110, which has supplied power to the load 170 in an emergency, is also stopped.

The charging mode of the uninterruptible power supply unit 140 is also turned on when the power is supplied from the commercial power supply 120 and the battery 143 may be charged using the power supplied from the commercial power supply 120 .

2 to 6, the first switch 160 and the second switch 150 have different constructions. However, the first switch 160 and the second switch 150 may be implemented by a single switch.

7 is a view for explaining a connection structure of a generator and an uninterruptible power supply according to another embodiment of the present invention.

The connection structure of the generator and the uninterruptible power supply according to another embodiment of the present invention is such that the load 170 is connected to the uninterruptible power supply 140 or the bypass 180 using one switch 190 .

For example, when the generator is driven, the automatic switch 130 is transferred to the generator 110 and then the switch 190 is transferred to the bypass 180. When the fault generated in the commercial power source 120 is removed, 190 to the uninterruptible power supply 140 side, and then the automatic switch 130 is switched to the commercial power supply 120 side.

Details of the method of controlling the generator and the uninterruptible power supply have been described in detail with reference to FIG. 2 to FIG. 6, so that redundant description will be omitted.

8 is a flowchart illustrating a method of controlling a generator and an uninterruptible power supply according to an embodiment of the present invention.

The power supply 120 is operated in step S820 if it is determined that a failure has occurred in the commercial power supply 110 in step S810. When the generator 120 is operated, the automatic switch 130 is switched to the generator 120 side.

The second switch 150 included in the bypass 180 bypassing the uninterruptible power supply 140 is turned on in step S840 and the uninterruptible power supply 140 and the load 170 are connected The first switch 160 is turned off.

However, if the switch connecting the load 170 to the uninterruptible power supply 140 or the bypass 180 is implemented as a single switch, the switch is switched to the bypass 180 side.

When it is determined that the trouble generated in the commercial power supply 120 is removed (S850), the uninterruptible power supply 140 supplies power to the load 170 via the bypass 180, The switch is controlled to be connected to the load 170 (S860) and the automatic switch 130 is switched to the commercial power source 120 side.

As described above, when the electrical energy produced by the generator 110 is supplied to the load 170 using the bypass 180, the influence of harmonics due to the power element of the uninterruptible power supply 160 can be eliminated , It is possible to stably supply power to the load 170 even if the capacity of the generator 110 does not exceed the capacity of the uninterruptible power supply 160 by 1.5 to 2 times.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed methods should be considered from an illustrative point of view, not from a restrictive point of view. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (9)

A control method of a generator and an uninterruptible power supply connection structure including a bypass for bypassing an uninterruptible power supply and supplying power to a load,
Operating the generator when a fault occurs in the commercial power supply;
Transferring an automatic transfer switch (ATS) to the generator side;
Turning on a second switch included in the bypass for turning off the first switch connecting the uninterruptible power supply and the load and bypassing the uninterruptible power supply to connect the generator to the load, Control methods of the generator and uninterruptible power supply connection structure including. The method according to claim 1,
Wherein the step of transferring the automatic switch to the generator comprises:
And turning on the charging mode of the uninterruptible power supply when the automatic switch is switched to the generator side. The method according to claim 1,
When the fault generated in the commercial power supply is removed,
Turning off the second switch and turning on the first switch; And
And switching the automatic changeover switch to the commercial power supply side. The method of claim 3,
And turning on the charging mode of the uninterruptible power supply when the automatic switch is switched to the commercial power supply side. An automatic changeover switch which is switched so that the power of one of the commercial power supply or the generator is supplied to the load;
An uninterruptible power supply for supplying electric energy stored in the battery to the load by receiving power from the commercial power supply;
A bypass bypassing the uninterruptible power supply and connected to the load;
A first switch for connecting the uninterruptible power supply and the load; And
A connection structure of a generator and an uninterruptible power supply including a second switch included in the bypass. 6. The method of claim 5,
When the commercial power source fails,
The automatic switch is switched to the generator,
Wherein the first switch is turned off and the second switch is turned on, and a connection structure of the uninterruptible power supply device. The method according to claim 6,
Wherein the uninterruptible power supply comprises:
And a connection structure of the generator and the uninterruptible power supply for turning off the charging mode when the automatic switch is switched to the generator. The method according to claim 6,
When the fault generated in the commercial power supply is removed,
Wherein the first switch is turned on, the second switch is turned off, and the automatic switch is switched to the commercial power supply side. 9. The method of claim 8,
Wherein the uninterruptible power supply comprises:
And a connection structure of the generator and the uninterruptible power supply for turning on the charging mode when the automatic switch is switched to the commercial power supply.
KR1020150131642A 2015-09-17 2015-09-17 Structure of generator and uninterruptible power system KR20170033644A (en)

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KR1020150131642A KR20170033644A (en) 2015-09-17 2015-09-17 Structure of generator and uninterruptible power system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832695A (en) * 2018-07-25 2018-11-16 珠海格力电器股份有限公司 Direct current micro-grid system, charge circuit circuit and its control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108832695A (en) * 2018-07-25 2018-11-16 珠海格力电器股份有限公司 Direct current micro-grid system, charge circuit circuit and its control method
US11929634B2 (en) 2018-07-25 2024-03-12 Gree Electric Appliances, Inc. Of Zhuhai DC micro-grid system, charging loop circuit and control method thereof

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