KR101859053B1 - Standby generator synchronizing operation of closed transition transfer switch - Google Patents

Standby generator synchronizing operation of closed transition transfer switch Download PDF

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Publication number
KR101859053B1
KR101859053B1 KR1020150189034A KR20150189034A KR101859053B1 KR 101859053 B1 KR101859053 B1 KR 101859053B1 KR 1020150189034 A KR1020150189034 A KR 1020150189034A KR 20150189034 A KR20150189034 A KR 20150189034A KR 101859053 B1 KR101859053 B1 KR 101859053B1
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South Korea
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power
emergency generator
generator
emergency
supplied
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KR1020150189034A
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Korean (ko)
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KR20170078991A (en
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한운기
임현성
정진수
조성구
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한국전기안전공사
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/08—Synchronising of networks
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator

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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

An emergency generator synchronous control operation system using an uninterruptible transfer device that enables AVR and governor signals of an emergency generator to satisfy the voltage difference, frequency difference, and phase difference between the emergency generator and the system within the reference value A method is disclosed.
An emergency generator synchronous control operating method using an uninterruptible power supply (UPS), comprising: measuring power information of a power source supplied from the system when power supplied from the system is restored; Measuring power source information of a power source supplied from the emergency generator; Comparing and calculating the power information, determining whether the comparison and calculation result satisfy a reference range; Controlling the AVR to adjust the voltage level of the emergency generator when the determination result does not satisfy the reference range of the voltage; Adjusting the phase and frequency magnitude of the emergency generator by informing the user if the determination result does not satisfy the reference range of phase and frequency and controlling the governor; Supplying power to the load from the system when the determination result satisfies the reference range; And disconnecting power supplied from the emergency generator to the load.
According to the present invention, it is possible to secure the operation reliability of the system to the user by preventing the failure of the uninterruptible power supply through synchronous control of the emergency generator and the system.
In addition, there is an effect that the safety of the system can be ensured by blocking the instantaneous arc in accordance with the operation of the breaker.

Description

Technical Field [0001] The present invention relates to an emergency generator synchronous control operation system and method using an uninterruptible alternator,

The present invention relates to an emergency generator synchronous control operating system and method using an uninterruptible alternator, and more particularly, to an emergency generator synchronous control operating system and method using an AVR and a governor The present invention relates to an emergency generator synchronous control operating system and method using an uninterruptible transfer apparatus that enables an uninterruptible power transfer by controlling a signal of an emergency power generator.

An uninterrupted power supply (UPS) is a device that provides power from a battery or a separate auxiliary power source to a load in case of an emergency such as a power failure.

In the event of a power outage, the uninterruptible power supply will operate and the auxiliary power will provide power for a few seconds to several hours so that the electrical equipment of the load can be protected and safely terminated.

Generally, non-power supplies are not limited to computer protection equipment and are used to prevent damage to data centers, telecommunications equipment, or other electrical equipment caused by unexpected power outages, serious business disruption, or data loss.

Uninterruptible power supplies are mainly on-line, off-line, and line-interactive.

Among these, the on-line method converts the commercial power into the direct current power by the converter circuit, the converted direct current power is charged to the battery through the charging circuit, and the converted direct current power is output through the inverter circuit.

The off-line method outputs the commercial AC power as it is, and the charging circuit charges the battery.

During a power failure, the inverter circuit is driven to output the power stored in the battery.

In addition, in the line interactive system, the battery and the inverter circuit are always connected to each other to convert power, and when the commercial AC power is lower than the detection level of the commercial AC power, the automatic transfer switch of the input terminal is turned off, .

On the other hand, when the commercial power is shut off due to a power failure and the utility power is restored to the battery or the emergency generator, or when the emergency power generator is switched to the commercial power, the instantaneous power failure Without switching.

Conventional ATS (Auto Transfer Switch) is a method of transferring between two different power supply elements, one of which is disconnected and then transferred to another power source element, so that a power failure occurs for about 0.01 to 0.10 second .

On the other hand, uninterruptible power transfer (CTTS) is a structure in which both power sources are turned on at the moment of an extremely short transfer, and one power source is cut off.

However, since the CTTS operates only when the synchronization of power sources such as voltage, frequency, and phase is synchronized between two power supply elements, uninterrupted transfer is not performed at a desired time point due to unsatisfactory synchronization conditions .

Korean Patent No. 1417492 (issued on July 08, 2014)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an emergency generator and a system in which the voltage difference, frequency difference and phase difference between the emergency generator and the system are adjusted within a reference value, So that the uninterruptible transfer can be performed at the time point.

According to an aspect of the present invention, there is provided an emergency generator synchronous control and operation system using an uninterruptible power supply (UPS)

An emergency generator synchronous control operating system using an uninterruptible power supply apparatus that supplies power to a load by supplying power from a system and generates and supplies an emergency power from an emergency generator when an abnormality occurs in the power supplied from the system,

An uninterruptible automatic switching device which is provided between the system, the load and the emergency generator, for supplying or blocking power supplied to the load from the system and the emergency generator;

And a synchronization control device electrically connected to the system and the emergency generator to measure power information, compare and determine the measured power information, and control the emergency generator based on the determination result.

The synchronous control device may further include: a system measurement unit that measures power supply information of a power source supplied from the system; A generator measuring unit for measuring power information of a power source supplied from the emergency generator; An AVR (Automatic Voltage Regulator) for adjusting the voltage magnitude of the emergency generator; An engine for adjusting the phase and frequency magnitude of the emergency generator; A governor for controlling the phase and frequency of the emergency generator by sending an adjustment signal to the engine; A control unit for controlling the system measurement unit and the generator measurement unit, determining the power information measured by the system measurement unit and the generator measurement unit, and controlling the AVR and the governor based on the determination result; A storage unit for storing power information measured by the system measurement unit and the generator measurement unit, and a determination result of the control unit; And an alarm unit for generating an alarm and a signal to the user.

According to an aspect of the present invention, there is provided an emergency generator synchronous control and operation method using an uninterruptible power supply (UPS)

An emergency generator synchronous control operation method using an uninterruptible power supply apparatus that supplies power to a load by supplying power from a system and generates and supplies an emergency power from an emergency generator when an abnormality occurs in the power supplied from the system,

When the power supplied from the system is restored, the control unit controls the system measurement unit to measure the power information of the power source supplied from the system;

The control unit controlling the generator measuring unit to measure power supply information of the power supplied from the emergency generator;

The control unit compares and calculates the power information measured from the system measurement unit and the generator measurement unit, and determines whether the comparison and calculation result satisfy the reference range;

Controlling the alarm unit to inform the user if the determination result does not satisfy the reference range of the voltage;

Adjusting the voltage magnitude of the emergency generator by controlling the AVR if the determination result does not satisfy the reference range of the voltage;

Controlling the alarm unit to inform the user if the determination result does not satisfy the reference range of phase and frequency;

Adjusting the phase and frequency magnitude of the emergency generator by controlling the governor if the determination result does not satisfy the reference range of phase and frequency;

Connecting the main switching unit to supply power to the load from the system when the determination result satisfies the reference range;

And disconnecting the emergency switching unit to shut off the power supplied from the emergency generator to the load.

As described above, the emergency generator synchronous control operating system and method using the uninterruptible switching system according to the present invention,

It is possible to secure the operational reliability of the system to the user by preventing the failure of the uninterrupted changeover through the synchronous control of the emergency generator and the system.

In addition, there is an effect that the safety of the system can be ensured by blocking the instantaneous arc in accordance with the operation of the breaker.

1 is a block diagram illustrating an emergency generator synchronous control operating system using an uninterruptible power supply (UPS) according to an embodiment of the present invention.
FIG. 2 is a block diagram of an emergency generator synchronous control operating system using an unstable switching device according to an embodiment of the present invention. Referring to FIG.
3 is a flowchart sequentially illustrating an operation method of synchronous control of an emergency generator using an uninterruptible power supply (UPS) according to an embodiment of the present invention.
4 is a flowchart illustrating a synchronization control algorithm of the uninterruptible power supply switching apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" ... "," module ", and the like described in the specification mean units for processing at least one function or operation, and may be implemented by hardware or software or a combination of hardware and software .

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

Like reference symbols in the drawings denote like elements.

FIG. 1 is a block diagram illustrating a synchronous control and operation system for an emergency generator using an uninterruptible power transfer apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram of an emergency generator synchronous control operation using an uninterruptible transfer apparatus according to an embodiment of the present invention. Fig. 2 is a block diagram showing an example of a system.

As shown in FIGS. 1 and 2, the present invention comprises a system 100, a load 200, an emergency generator 300, an uninterruptible power supply switching apparatus 400, and a synchronous control apparatus 500.

The system 100 supplies power to the load 200 by receiving a commercial power such as a KEPCO power supply.

The emergency generator 300 generates and supplies an emergency power source to the load 200 when a power failure occurs due to a lightning stroke or a short circuit in the power source supplied from the system 100.

In addition, the uninterruptible power supply unit 400 is configured between the system 100, the load 200, and the emergency generator 300,

A main switching unit 410 electrically connected between the system 100 and the load 200 to supply or cut off the power supplied from the system 100 to the load 200,

And an emergency switching unit 420 electrically connected between the emergency generator 300 and the load 200 to supply or cut off the power supplied from the emergency generator 300 to the load 200.

Then, the synchronous control device (500)

A system measurement unit 510 for measuring power supply information of a power source supplied from the system 100;

A generator measurement unit 520 for measuring power supply information of the power supplied from the emergency generator 300;

An AVR (Automatic Voltage Regulator) 530 for adjusting the voltage magnitude of the emergency generator 300;

An engine 550 for adjusting phase and frequency magnitudes of the emergency generator 300;

A governor 540 for controlling the phase and the frequency of the emergency generator 300 by sending an adjustment signal to the engine 550;

The system monitoring unit 510 and the generator measurement unit 520 and determines the power information measured by the system measurement unit 510 and the generator measurement unit 520. The AVR 530, A control unit 560 for controlling the governor 540;

A storage unit 570 for storing the power information measured by the system measurement unit 510 and the generator measurement unit 520 and the determination result of the control unit;

And an alarm unit 580 for generating an alarm and a signal to the user.

A description will now be made of a synchronous control operation method of an emergency generator using an uninterruptible transfer apparatus having such a configuration.

The present invention provides power to the load (200) by receiving power from the system (100), generating an emergency power from the emergency generator (300) when an abnormality occurs in the power supplied from the system (100) A method for operating an emergency generator synchronous control system using an uninterruptible power supply (UPS)

(S 10) when the power supplied from the system 100 is restored, the control unit 560 controls the system measuring unit 510 to measure the power source information of the power source supplied from the system 100;

The controller 560 controls the generator measuring unit 520 to measure the power supply information of the power supplied from the emergency generator 300 (S20);

The control unit 560 compares and calculates the power information measured from the system measurement unit 510 and the generator measurement unit 520, and determines whether the comparison and calculation results satisfy the reference range (S30).

If the determination result does not satisfy the reference range of the voltage, the control unit 560 controls the alarm unit 580 to notify the user of the alarm unit 580 (S40);

If the determination result does not satisfy the reference voltage range, the controller 560 controls the AVR 530 to adjust the voltage magnitude of the emergency generator 300 (S50).

If the determination result does not satisfy the reference range of phase and frequency, the control unit 560 controls the alarm unit 580 to inform the user (S60);

The control unit 560 controls the governor 540 to adjust the phase and frequency magnitude of the emergency generator 300 when the determination result does not satisfy the reference range of phase and frequency (S70).

(S80) connecting the main switching unit (410) and supplying power to the load (200) from the system (100) when the determination result satisfies the reference range;

And disconnecting the power supplied from the emergency generator 300 to the load 200 by shutting off the emergency switching unit 420 (S90).

Here, the reference range is set such that the voltage difference between the power supplied from the system 100 and the power supplied from the emergency generator 300 is within 5%, the frequency difference is within 0.2 Hz, and the phase difference is within 5 °.

This will be described in detail as follows.

As shown in FIGS. 1 and 2, when an abnormality occurs due to a power failure such as a lightning stroke or a short circuit, the uninterruptible power supply apparatus 400 is operated, (300) is supplied to the load (200).

That is, the emergency switching unit 420 is connected, the power of the emergency generator 300 is supplied to the load, and the main switching unit 410 is shut off.

3 is a flowchart sequentially illustrating an operation method of synchronous control of an emergency generator using an uninterruptible power supply (UPS) according to an embodiment of the present invention.

3, when the power of the system 100 is restored, the control unit 560 of the synchronous control apparatus 500 controls the system measuring unit 510 to detect the power information of the power supplied from the system 100 (S10).

Then, the control unit 560 controls the generator measurement unit 520 to measure the power supply information of the power supplied from the emergency generator 300 (S20).

Here, the power information includes at least one of a voltage, a phase, and a frequency.

However, the power supply information is not limited to this, and other items may be measured according to the needs of the user.

The control unit 560 compares and calculates the power information measured by the system measurement unit 510 and the generator measurement unit 520, and determines whether the comparison and calculation results satisfy the reference range (S30).

Here, the reference range is obtained by comparing and calculating the power supply information of the power supply supplied from the system 100 and the power supply information of the power supply supplied from the emergency generator 300 so that the difference in voltage between the two power supplies is within 5% 0.2 Hz or less, and the phase difference is preferably within 5 [deg.].

However, the reference range is not limited to this, and it is possible to set different reference ranges according to the needs of the user.

If it is determined that the reference range of the voltage is not satisfied, the controller 560 controls the alarm unit 580 to notify the user (S40).

If the determination result does not satisfy the reference voltage range, the controller 560 controls the voltage level of the emergency generator 300 by controlling the AVR 530 in operation S50.

If the determination result does not satisfy the reference range of the phase and the frequency, the controller 560 controls the alarm unit 580 to notify the user (S60).

If the determination result does not satisfy the reference range of phase and frequency, the controller 560 controls the governor 540 to send a control signal to the engine 550 so that the phase of the emergency generator 300 And the frequency magnitude are adjusted (S70).

If the determination result satisfies the reference range, the main switching unit 410 is connected to supply power to the load 200 from the system 100 (S80).

At this time, the power supplied from the system 100 and the power supplied from the emergency generator 300 are connected in parallel and simultaneously supplied to the load 200.

In addition, since the voltage difference, the frequency difference, and the phase difference of the two power supplies are adjusted to satisfy the reference range, no instantaneous arc occurs in the process of connecting the main switching unit 410.

The emergency switching unit 420 is interrupted to shut off the power supplied from the emergency generator 300 to the load 200 so that only the power supplied from the system 100 is supplied to the load 200.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

100: System 200: Load
300: emergency generator 400: uninterruptible transfer device
410: main switching unit 420: emergency switching unit
500: Synchronous control device 510:
520: Generator measuring section 530: AVR
540: Governor 550: Engine
560: Control section 570:
580: Alarm section

Claims (5)

An emergency generator synchronous control operating system using an uninterruptible power supply apparatus that supplies power to a load by supplying power from a system and generates and supplies an emergency power from an emergency generator when an abnormality occurs in the power supplied from the system,
An uninterruptible transfer device which is provided between the system, the load and the emergency generator, for supplying or blocking power supplied to the load from the system and the emergency generator; And
And a synchronous control device electrically connected to the system and the emergency generator to measure power information, compare and determine the measured power information, and control the emergency generator based on the determination result,
The uninterruptible transfer apparatus
A main switching unit electrically connected between the system and the load to supply or cut off power supplied from the system to the load;
And an emergency switching unit electrically connected between the emergency generator and the load to supply or cut off power supplied from the emergency generator to the load,
The synchronization control device
A system measurement unit for measuring power supply information of a power supply supplied from the system;
A generator measuring unit for measuring power information of a power source supplied from the emergency generator;
An AVR (Automatic Voltage Regulator) for adjusting the voltage magnitude of the emergency generator;
An engine for adjusting the phase and frequency magnitude of the emergency generator;
A governor for sending a control signal to the engine to adjust the phase and frequency of the emergency generator;
And a control unit that controls the system measurement unit and the generator measurement unit to measure power supply information of the power supply, determine the power supply information measured by the system measurement unit and the generator measurement unit, Phase and frequency magnitude of the emergency generator by controlling the AVR and governor so that a voltage difference, a phase difference, and a frequency difference of a power source supplied from the power source satisfy a predetermined reference range;
A storage unit for storing power information measured by the system measurement unit and the generator measurement unit, and a determination result of the control unit; And
And an alarm unit for generating an alarm and a signal to the user,
Wherein the power supply information includes at least one of voltage, phase, and frequency,
Wherein the reference range is such that the voltage difference between the power supplied from the system and the power supplied from the emergency generator is within 5%, the frequency difference is within 0.2 Hz, and the phase difference is within 5 [deg.]. .
delete delete An emergency generator synchronous control operation method using an uninterruptible power supply apparatus that supplies power to a load by supplying power from a system and generates and supplies an emergency power from an emergency generator when an abnormality occurs in the power supplied from the system,
When the power supplied from the system is restored, the control unit controls the system measurement unit to measure the power information of the power source supplied from the system;
The control unit controlling the generator measuring unit to measure power supply information of the power supplied from the emergency generator;
The control unit compares and calculates the power information measured from the system measurement unit and the generator measurement unit, and determines whether the comparison and calculation result satisfy the reference range;
Controlling the alarm unit to inform the user if the determination result does not satisfy the reference range of the voltage;
Adjusting the voltage magnitude of the emergency generator by controlling the AVR if the determination result does not satisfy the reference range of the voltage;
Controlling the alarm unit to inform the user if the determination result does not satisfy the reference range of phase and frequency;
Adjusting the phase and frequency magnitude of the emergency generator by controlling the governor if the determination result does not satisfy the reference range of phase and frequency;
Connecting the main switching unit to supply power to the load from the system when the determination result satisfies the reference range;
And disconnecting the power supplied to the load from the emergency generator by interrupting the emergency switching unit,
Wherein the power supply information includes at least one of voltage, phase, and frequency,
Wherein the reference range is such that the voltage difference between the power supplied from the system and the power supplied from the emergency generator is within 5%, the frequency difference is within 0.2 Hz, and the phase difference is within 5 [deg.]. .
delete
KR1020150189034A 2015-12-29 2015-12-29 Standby generator synchronizing operation of closed transition transfer switch KR101859053B1 (en)

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KR20200041592A (en) 2018-10-12 2020-04-22 주식회사 지엔이피에스 Generator switching system having grid-tied and uninterruptible power supply
KR101958894B1 (en) * 2018-11-28 2019-03-15 디아이케이(주) phase control apparatus applied in grid and emergency generator
KR102087607B1 (en) * 2019-11-22 2020-03-11 주식회사 우경일렉텍 Uninterruptible system switchover operating device of water supply equipment
KR102172452B1 (en) * 2020-04-20 2020-10-30 주식회사 우경일렉텍 Power system uninteruptible switchover method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101199237B1 (en) * 2011-04-20 2012-11-08 서울기연(주) Automatic transfer system having self diagnosis function
KR101466162B1 (en) * 2014-01-02 2014-11-27 주식회사 리젠코 System for load transfer between commercial use power supply and emergency generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101199237B1 (en) * 2011-04-20 2012-11-08 서울기연(주) Automatic transfer system having self diagnosis function
KR101466162B1 (en) * 2014-01-02 2014-11-27 주식회사 리젠코 System for load transfer between commercial use power supply and emergency generator

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