KR101480770B1 - Control Operating System And Method for Energy Development Source - Google Patents

Control Operating System And Method for Energy Development Source Download PDF

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Publication number
KR101480770B1
KR101480770B1 KR20120130215A KR20120130215A KR101480770B1 KR 101480770 B1 KR101480770 B1 KR 101480770B1 KR 20120130215 A KR20120130215 A KR 20120130215A KR 20120130215 A KR20120130215 A KR 20120130215A KR 101480770 B1 KR101480770 B1 KR 101480770B1
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KR
South Korea
Prior art keywords
power
power supply
load
voltage
generator
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KR20120130215A
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Korean (ko)
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KR20140065573A (en
Inventor
오승열
송성근
신덕식
이상택
조주희
최정식
차대석
박병철
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전자부품연구원
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Priority to KR20120130215A priority Critical patent/KR101480770B1/en
Publication of KR20140065573A publication Critical patent/KR20140065573A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit 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
    • H02J9/06Circuit 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/248UPS systems or standby or emergency generators

Abstract

The present invention relates to an uninterruptible power supply system and method, and more particularly, to a commercial power supply unit that supplies commercial power through a power system, a load that is driven by the commercial power, An emergency power source for generating and supplying emergency power required for driving the generator by driving the generator according to a predetermined time elapse or not, A system for providing an uninterruptible power supply system and a method for operating the system are disclosed.

Description

[0001] The present invention relates to an emergency power supply system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply system, and more particularly, to an uninterruptible power supply system and method capable of performing a large capacity uninterruptible power supply function support by combining an emergency power generation system based on an internal combustion engine with a battery and a power converter will be.

In case of an emergency power generation system against a power failure of a building, a diesel generator is often used. In case of emergency power generation system using diesel generator, delay occurs in the process of power supply by generator. Therefore, in case of building power failure, it is inevitable that power failure occurs at a certain time interval. However, since diesel generators can not continue to develop in normal times, existing emergency power generation systems have been subjected to this power failure period. On the other hand, in recent years, systems that depend on the continuous supply of electric power have been used, and there are many systems in which the damage increases exponentially as the power failure interval increases. Accordingly, various proposals have been made for reducing the power outage period of the emergency power generation system using the diesel generator. However, it is impossible to remove the inevitable generation of the power outage due to the fundamental property of the generator. There is no number.

In addition, when a power failure occurs, the generator is driven to produce and supply the backup power. In the case of the recent power outage, the power recovery effort and the equipment are gradually developed, thereby improving the power recovery time. In other words, the situation in which a recent power outage occurs is often as short as several seconds. Accordingly, even if the generator is driven due to a power failure, the power generation situation is recovered by the time when proper power is produced, and the actual generated power is often meaningless. This situation needs to be improved because the power generation simply causes not only inefficiency but also additional problems such as waste of energy due to driving of the generator, shortening of life of the generator, and environmental pollution.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an uninterruptible power supply system and method capable of minimizing or eliminating a power failure period by supplying an emergency power source capacity through a power generator while preferentially supplying power based on an electronic UPS .

It is another object of the present invention to provide an uninterruptible power supply system and method capable of efficiently controlling unnecessary generator driving due to frequent power outage and stably supporting power supply of the system due to long-term power outage.

According to an aspect of the present invention, there is provided a power supply system including a commercial power supply unit that supplies commercial power through a power system, a load that is driven by the commercial power, And an emergency power supply system for supplying uninterruptible power to the load by supplying battery power based on the UPS device and generating and supplying emergency power required for driving the generator by driving the generator according to a predefined time lapse The present invention discloses a configuration of an uninterruptible emergency power supply system.

Wherein the emergency power supply system includes a circuit breaker disposed between the commercial power supply and the load to shut off the load and the commercial power supply when the power system is abnormally generated, 1 voltage / current sensor, a second voltage / current sensor disposed between the circuit breaker and the load, a UPS device for supplying power to the battery, a generator for performing the emergency power generation and supply including the generator, A system monitoring and control unit for controlling the power supply of the UPS device based on the sensed values of the first voltage / current sensor and the second voltage / current sensor, and controlling driving of the power generation device according to a predetermined time elapsed time, And a power conversion unit for converting the power source and the generator power source into a power source necessary for driving the load There.

If the sensed value of the first voltage / current sensor is abnormal and the sensed value of the second voltage / current sensor is abnormal, the system monitoring and control unit determines that an abnormality has occurred in the system, and performs a control notification according to the user's manual can do.

Meanwhile, the UPS device includes a battery capable of storing a predetermined amount of power for driving the load for the predetermined elapsed time and the time required for normal power generation of the generator.

Also, the system monitoring and control unit may control to stop the battery power supply of the UPS device when the generator is normally discharged and emergency power supply support for the load drive is possible.

The present invention also provides a method of controlling a power system, comprising: receiving an abnormal value sensing a sensed value of a power system supplied with commercial power corresponding to at least one of a power failure state and an overpower supply state; And supplying power to the load when the normal power supply restoration is not performed until a predetermined time elapses during the supply of the battery power to the load, And an uninterruptible power supply for supplying the uninterruptible power supply.

As described above, according to the embodiment of the present invention, the uninterruptible power supply system and method of the present invention perform UPS-based power supply based on electronic devices, Can be minimized.

Also, since the uninterruptible power supply system and method of the present invention can support the power failure compensation capacity according to the operation of the generator system, it can be applied to a building or system requiring a large power supply at a relatively low cost.

Further, in the present invention, unnecessary generator driving is not performed in a short period of time within a predetermined time, thereby improving the life of the generator and minimizing environmental pollution.

1 schematically shows a configuration of an uninterruptible emergency power supply system according to an embodiment of the present invention;
2 is a diagram for explaining an uninterruptible emergency power supply method according to an embodiment of the present invention;
3 is a diagram for explaining an emergency power supply method according to another embodiment of the present invention.
4 is a diagram for explaining an emergency power supply method according to another embodiment of the present invention.

Prior to the detailed description of the present invention, the terms or words used in the present specification and claims should not be construed as limited to ordinary or preliminary meaning, and the inventor may designate his own invention in the best way It should be construed in accordance with the technical idea of the present invention based on the principle that it can be appropriately defined as a concept of a term to describe it. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the elements in the accompanying drawings are exaggerated, omitted, or schematically shown, and the size of each element does not entirely reflect the actual size.

The uninterruptible emergency power supply system of the present invention described below rectifies the output of the emergency power generation system based on the internal combustion engine and combines it with the output terminal of the UPS to generate a desired output in the power converter. This uninterruptible emergency power supply system of the present invention assists the supply of power for the initial power outage by supplying the energy stored in the battery of the UPS to the power and then the output of the generator based on the internal combustion engine is supplied to the load . According to the present invention, the output of the generator is connected to a power converter, thereby enabling various controls for improving power supply efficiency related to the load.

1 is a diagram showing a configuration of an uninterruptible emergency power supply system 10 according to an embodiment of the present invention.

Referring to FIG. 1, the uninterruptible power supply system 10 of the present invention may be configured to include a commercial power supply 20, a load 30, and an emergency power supply 100.

The uninterruptible emergency power supply system 10 of the present invention including such a configuration supplies the commercial power supplied from the commercial power supply unit 20 to the load 30 connected to the power system. In this process, the emergency power supply 100 is connected in parallel between the power system and the load 30 to supply the stored emergency power to the load 30 when an abnormality occurs in the power supply of the commercial power supply 20 While generating new power and supplying it to the load 30. In particular, the emergency power supply 100 of the present invention can support seamless power supply even if a power outage occurs by using the UPS device 120, and can supply power to the power generator 130 So that the size of the UPS device 120 can be relatively reduced.

The commercial power supply unit 20 is a device for distributing and supplying commercial power, which is produced and supplied from various power generation facilities such as hydroelectric power, thermal power, and nuclear power. The commercial power supply unit 20 may be a power having a constant voltage having a constant frequency value produced by the power plant. The commercial power supplied from the commercial power supply unit 20 is transmitted to the load 30 through the power system.

The load (30) is a main body that consumes the commercial power supplied from the commercial power supply unit (20). Such a load 30 may be of various configurations. For example, when the main power supplied from the commercial power supply unit 20 is a building, the load 30 may be various office equipment, a boiler unit, a lamp, a hot air balloon, and an air conditioner disposed in the building and consuming electric power . The load 30 may be a conveyor belt, a motor, a compressor, a sprayer, or the like included in various components such as a factory machine, which is disposed in the factory and consumes power when the main body to which commercial power is supplied is a factory facility. This load 30 can be a large-capacity load requiring emergency power supply by driving the generator 131.

The emergency power supply 100 supplies the stored power and the generated power to the load 30 when an abnormality occurs in the commercial power supply 20. At this time, the emergency power supply apparatus 100 can check whether the power supply of the commercial power supply unit 20 has an abnormality or a problem has occurred in the system, and perform different tasks accordingly. That is, the emergency power supply apparatus 100 can stop the emergency power supply when an error occurs in the system in the process of supplying the emergency power according to the occurrence of the power failure, and can support the abnormal alarm according to the predefined manual. At this time, the emergency power supply 100 may record the history of the occurrence of an internal accident in the system and support the transmission of the accident occurrence history to a predefined predetermined device according to the setting. Meanwhile, the emergency power supply 100 provides emergency power to the load 30 when an abnormality occurs outside the system, that is, when the voltage distribution is not normally performed in the transformer corresponding to the commercial power supply unit 20 or the like. To this end, the emergency power supply 100 includes a circuit breaker 110, a first voltage / current sensor 111, a second voltage / current sensor 112, a system monitoring and control unit 160, a power conversion unit 170, A power generation device 130 and a UPS device 120. [

The breaker 110 is located in the power system between the commercial power supply unit 20 and the load 30 and is configured to block the connection between the commercial power supply unit 20 and the load 30 under the control of the system monitoring and control unit 160 to be. When the overcurrent or the overvoltage is supplied from the commercial power supply unit 20, the circuit breaker 110 automatically cuts off the power system so that the emergency power supply 100 and the load 30 ) Can be prevented from being damaged. When the circuit breaker 110 is operated and the power system between the commercial power supply unit 20 and the load 30 is shut off, the emergency power supply 100 can support the emergency power supply in the same manner as the occurrence of the power failure.

The first voltage / current sensor 111 senses voltage and current between the commercial power supply unit 20 and the circuit breaker 110 and provides the sensing result to the system monitoring and control unit 160. That is, the first voltage / current sensor 111 plays a role of monitoring abnormal generation of power supplied from the commercial power supply unit 20. In particular, the first voltage / current sensor 111 may not perform the sensor signal delivery when a predefined voltage and current of predetermined magnitude is supplied from the commercial power supply unit 20, And the voltage and current of the voltage and the current of the size smaller than the voltage and the current of the voltage and current of the voltage and current are supplied to the system monitoring and control unit 160. Also, the first voltage / current sensor 111 can transmit the overvoltage and overcurrent type power larger than the voltage and current of a predetermined magnitude from the commercial power supply unit 20 to the system monitoring and control unit 160.

The second voltage / current sensor 112 is disposed between the circuit breaker 110 and the load 30 to check the occurrence of an internal system error in the emergency power supply 100. The second voltage / current sensor 112 may sense the voltage / current signal transmitted to the load 30 and provide the voltage / current signal to the system monitoring and control unit 160.

The system monitoring and control unit 160 determines whether an abnormality has occurred in the commercial power supply unit 20 based on the sensing values supplied from the first voltage / current sensor 111 and the second voltage / current sensor 112, It is confirmed whether an abnormality has occurred. In particular, when the system monitoring and control unit 160 receives an abnormal sensing value corresponding to a signal that detects a power source of a predetermined magnitude or less from the first voltage / current sensor 111, for example, a power failure, the system monitoring and control unit 160 recognizes the occurrence of a current power failure, It is possible to control the power to be supplied to the load 30. At this time, the system monitoring and control unit 160 may support the breaker 110 to cut off the power system. The system monitoring and control unit 160 receives the abnormal sensing value corresponding to the overvoltage and the overcurrent corresponding to the current and voltage of a predetermined magnitude or more from the first voltage / current sensor 111, And to control the supply of the emergency power to the load 30. [ The system monitoring and control unit 160 monitors whether a power supply corresponding to a voltage and a current of a normal magnitude is performed in the first voltage / current sensor 111. If the power supply is performed, the system monitoring and control unit 160 performs power recovery or overcurrent / overvoltage supply recovery And to stop the emergency power supply. After stopping the emergency power supply, the system monitoring and control unit 160 can support the battery charging of the UPS device 120 using the commercial power supplied from the commercial power supply unit 20. [

As described above, when a situation is required to supply the emergency power to the load 30, the system monitoring and control unit 160 firstly controls the UPS monitoring and control unit 160, (120) to supply the power of the battery (121) to the load (30). At this time, the system monitoring and control unit 160 controls the power conversion unit 170 to control the DC power supplied from the battery 121 to convert the AC power corresponding to the commercial power. The power converted by the power conversion unit 170 may be supplied to the load 30.

Meanwhile, the system monitoring and control unit 160 drives the timer while supplying the power of the battery 121 to the load 30 to check whether the power failure state or the overpower state continues for a predetermined period of time. The system monitoring and control unit 160 may control the power generation unit 130 to generate power when the power failure state or the overpower supply state continues while the timer expires. The system monitoring and control unit 160 may control the power generated by the power generation unit 130 to be supplied to the load 30 via the power conversion unit 170. In this process, the system monitoring and control unit 160 can support the power supply of the battery 121 of the UPS device 120 until the generator 131 is normally driven. The system monitoring and control unit 160 controls the power supply to the UPS device 120 to be stopped when the power generation of the generator 131 reaches a predetermined amount of power generation of a predetermined size and only the power generated by the generator 131 To the load (30).

The system monitoring and control unit 160 controls the power generation unit 130 when the power supply is supplied to the load 30 through the UPS unit 120 and the power supply state is restored before the timer expires. It is possible to provide the load 30 with the commercial power provided from the commercial power supply unit 20 without performing the driving. At this time, the system monitoring and control unit 160 can support charging of the battery 121 of the UPS device 120 by using the commercial power provided from the commercial power supply unit 20.

The power conversion unit 170 converts the direct current power of the battery 121 provided in the UPS device 120 into the alternating current power corresponding to the commercial power as described above. The power conversion unit 170 can support the converted AC power to be supplied to the load 30. Meanwhile, the power conversion unit 170 converts the DC power rectified by the power generated by the generator 131 into an AC power corresponding to the commercial power received from the rectifier 135. The power conversion unit 170 converts power supplied from the generator 131 and power supplied from the UPS device 120 into power required for driving the load 30 and supplies the power to the load 30 . In this case, the system monitoring and controlling unit 160 may control the size of the power source of the battery 121, which is supplied from the UPS device 120, The power conversion unit 170 converts the power generated by the generator 131 and the power supplied to the UPS device 120 into AC power by controlling the output of the battery 121 included in the UPS 120, To the user.

The power generation device 130 is configured to generate emergency power according to the control of the system monitoring and control unit 160. The generator 130 may include a generator 131, a rectifier 135, and a maximum efficiency controller 133 based on an internal combustion engine. The generator 131 provides the generated power generated by the grid monitoring and control unit 160 to the rectifying unit 135. At this time, the generator 131 can support the production of emergency power according to the maximum efficiency under the control of the maximum efficiency controller 133. On the other hand, the producible power capacity of the generator 131 corresponds to the total power capacity that can be applied to the load 30, or the power capacity required for the entire load 30 can be increased by a predetermined ratio or more Device. The generator 131 may be constructed on the basis of an internal combustion engine, and accordingly, fossil fuel may be used to generate power and provide it to the rectifying unit 135. The rectifying unit 135 rectifies the power generated by the generator 131 to a constant power and supplies the rectified power to the power converting unit 170. The rectifying unit 135 may be composed of elements having a capacity corresponding to the magnitude of the power capacity that can be produced by the generator 131. The maximum efficiency control unit 133 controls the efficiency of driving the generator 131 to produce power required for driving the load 30. [ The maximum efficiency controller 133 performs the operation control of the generator 131 so as to operate at the best speed and torque in generating the same output.

The UPS device 120 stores power and stores the power, and supplies the stored power to the power converter 170 under the control of the system monitoring and control unit 160. The UPS device 120 may include a battery 121, a charge / discharge control unit 123, and a battery monitoring unit 125. The battery 121 may be configured to temporarily store a predetermined amount of power for driving the load 30 as a configuration for storing power for use as emergency power. For example, the capacity of the battery 121 may be designed to have a capacity to supply the amount of power required for driving the load 30 for a predetermined period of time when the circuit breaker 110 operates in response to occurrence of a static electricity or the like . Particularly, the capacity of the battery 121 is required for driving the load 30 for a time set to determine whether to drive the generator 131 and for a time required for the generator 131 to perform normal power output after driving the generator 131 It can be designed to have a capacity enough to supply electric power. For example, if the generator 131 is designed to drive the generator 131 when 10 seconds have elapsed after the operation of the circuit breaker 110 and the generator 131 takes 7 seconds for normal operation, the capacity of the battery 121 is 17 seconds or longer The power supply necessary for driving the load 30 can be supplied. The battery monitoring unit 125 calculates the charging and discharging states of the battery 121 and provides information on the set time and the remaining amount of the battery 121 to the system monitoring and control unit 160. The charging / discharging control unit 123 supports the charging of the battery 121 according to the system monitoring and control unit 160 and supports the discharge control of the battery 121 based on the command of the system monitoring and control unit 160.

2 is a view for explaining an uninterruptible emergency power supply method according to an embodiment of the present invention.

Referring to FIG. 2, in the uninterruptible power supply method of the present invention, the system monitoring and control unit 160 performs power supply monitoring in step S101. That is, the system monitoring and control unit 160 receives sensing values sensed from the first voltage / current sensor 111 and the second voltage / current sensor 112. Then, the system monitoring and control unit 160 determines whether an error has occurred in the emergency power supply 100 based on the sensing value received in step S103. In other words, if the sensing value is equal to the previously sensed value, the system monitoring and control unit 160 can determine that the system is in a normal state. If the power supply abnormality does not occur, the system monitoring and control unit 160 branches to the step before step S101, .

On the other hand, if an abnormality occurs in the power supply in step S103, that is, if a change occurs in the sensing value, the system monitoring and control unit 160 branches to step S105 and checks whether an abnormality has occurred outside the system. Before performing this process, the system monitoring and control unit 160 operates to operate the circuit breaker 110 to perform the interruption between the commercial power supply unit 20 and the load 30. [ If there is no abnormality outside the system, that is, if there is no signal change of the first voltage / current sensor 111 but an abnormality occurs in the system where a signal change of the second voltage / current sensor 112 occurs, A notification can be performed so that control according to the manual is performed. For example, the system monitoring and control unit 160 can alarm occurrence of an internal abnormality in the system through a warning lamp operation or a warning information message output.

In a case where an external abnormality occurs in the system, that is, a signal change of the first voltage / current sensor 111 occurs in step S105, the system monitoring and control unit 160 can support power supply based on the UPS device 120 in step S109 . That is, to supply the power stored in the battery 121 to the load 30 through the power conversion unit 170. [ The DC power of the battery 121 is changed to the AC power for use of the load 30 through the power conversion unit 170 and the changed AC power can be supplied to the load 30. [

The system monitoring and control unit 160 can check whether the power failure has been recovered during the set time period in step S111 by supplying the power of the battery 121 to the load 30. [ In this case, the system monitoring and control unit 160 branches to step S113 if it is determined that the power saving is not restored during the set time, that is, if the sensing value of the first voltage / current sensor 111 is not recovered to the predetermined power size The generator 131 may be requested to operate. Then, the power generation apparatus 130 can receive the power generation request from the system monitoring and control unit 160 and control the power generation apparatus 131 to drive the power generation request according to the received power generation request. The emergency power produced by the generator 131 is rectified through the rectifying unit 135 and the rectified power is supplied to the power converting unit 170 and provided as the AC power required for driving the load 30 . In particular, the system monitoring and control unit 160 may support supplying the driving power based on the UPS device 120 and the power generation device 130 in step S115.

Then, the system monitoring and control unit 160 checks whether or not the power failure recovery is performed using the sensing value of the first voltage / current sensor 111 in step S117. If it is in the pre-power recovery state, the system monitoring and control unit 160 branches to step S113, You can support to redo the process.

If the sensed value is recovered in step S117, that is, when the normal power is supplied from the commercial power supply unit 20, the system monitoring and control unit 160 transmits the power of the commercial power supply unit 20 to the load 30 ). ≪ / RTI > To this end, the system monitoring and control unit 160 operates the breaker 110 to support the power system to be connected.

In addition, the system monitoring and control unit 160 can stop the operation of the generator 131 and stop the power supply to the UPS device 120 when the power of the commercial power supply unit 20 is normally supplied. The system monitoring and control unit 160 supports charging of the UPS device 120 in step S119 for the power supplied from the commercial power supply unit 20. [ Then, the system monitoring and control unit 160 may return to the step before step S101 and may support the process to be performed again.

Although the UPS device 120 and the power generation device 130 have been described as performing the simultaneous power supply operation in the above description, it is also possible to support the power supply of the power generation device 130 independently in accordance with the state of the UPS device 120 The power supply of the UPS device 120 may be stopped and only the power supply generated by the power generation device 130 may be performed when the power generation device 130 has elapsed to enable normal power generation. This will be described in more detail with reference to FIGS. 3 and 4. FIG.

3 is a view for explaining a power supply method according to another embodiment of the present invention.

3, when the generator 131 is driven in step S113 of FIG. 2, the system monitoring and control unit 160 controls the UPS device 120 and the driven generator 131 To the load 30. As shown in Fig.

Then, the system monitoring and control unit 160 performs UPS monitoring in step S203. In step S205, the system monitoring and control unit 160 determines whether there is an abnormality in the UPS. If the UPS abnormality does not occur at this stage, the process branches to step S117 of FIG. 1 to confirm whether or not the power failure has been restored, and to support the operation according to the result.

On the other hand, if there is an abnormality in the UPS in step S205, the system monitoring and control unit 160 branches to step S207 to perform the abnormality notification and the independent drive of the generator 131, while using the independently driven generator 131, As shown in FIG. To this end, the power generated by the generator 131 can be increased to the amount of power required for driving the load 30.

4 is a view for explaining a power supply method according to another embodiment of the present invention.

Referring to FIG. 4, the system monitoring and control unit 160 controls the generator 131 to be driven in step S113 of FIG. 1, and branches to step S301 so that the power generation amount of the generator 131 is equal to or greater than a predetermined set value Confirm whether it is. If the power generation amount of the generator 131 is equal to or less than the predetermined set value in step S301, the system monitoring and control unit 160 branches the power supply from the UPS apparatus 120 and the power generation apparatus 130 to the load 30, .

If the generator power generation amount is equal to or greater than the set value in step S301, the system monitoring and control unit 160 branches the operation to step S303 to stop the UPS operation and support the generator independent drive. Also, the system monitoring and control unit 160 can support the independent supply of the power generated from the independently driven generator 131 to the load 30. Accordingly, the emergency power supply 100 can support operation of the load 30 using only the power generated from the generator 131. [ Then, the system monitoring and control unit 160 branches to step S117 and can perform operation control according to whether or not the power recovery is performed.

As described above, the uninterruptible power supply system (10) and method of the present invention, when a power outage or an over-power supply situation occurs, interrupts the power system and supplies power to the battery 121 of the UPS device (120) (30) to maintain the uninterrupted state. In addition, the present invention can support the power supply of the UPS device 120 by supporting the power supply by driving the generator 131 in accordance with the maintenance of the situation, so that it can cope with a long-term power outage and the like. In addition, the present invention suppresses the operation of the generator 131 indiscriminately for the purpose of compensation for power generation occurring in units of several seconds, and enables the generator 131 to be driven only when necessary, thereby improving the life of the generator 131, Thereby minimizing environmental pollution.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention and the scope of the appended claims.

10: Uninterruptible Emergency Power Supply System
20: commercial power supply unit 30: load
100: Emergency power supply 110: Circuit breaker
111: first voltage / current sensor 112: second voltage / current sensor
120: UPS device 121: battery
123: charge / discharge control unit 125:
130: power generation device 131: generator
133: maximum efficiency control section 135: rectification section
160: System monitoring and control unit 170: Power conversion unit

Claims (6)

  1. A commercial power supply unit for supplying commercial power to the power system; A load that is driven using the commercial power; And an emergency power supply system for generating and supplying emergency power required for maintaining the driving of the load, the system comprising:
    The emergency power supply system
    A circuit breaker disposed between the commercial power supply and the load for shutting off the load and the commercial power supply when an overcurrent or an overcurrent occurs in the power system;
    And a controller that is disposed between the commercial power supply unit and the breaker and detects whether a voltage and current of a predetermined voltage and a predetermined magnitude or a voltage and current of a predetermined magnitude and an overcurrent 1 voltage / current sensor;
    A second voltage / current sensor disposed between the breaker and the load for inspecting an occurrence of an internal system error of the emergency power supply and generating a voltage / current signal;
    A UPS device for supplying battery power to the load when an abnormality occurs;
    A power generator, including a rectifier and a maximum efficiency controller, for rectifying the generated power and producing emergency power according to the maximum efficiency;
    A system monitoring and control unit for controlling the power supply of the UPS device based on the sensed values of the first voltage / current sensor and the second voltage / current sensor, and controlling the power generation device drive according to a predetermined time elapse;
    A power converter for converting the battery power and the generator power into a power required for driving the load; And an uninterruptible power supply system.
  2. delete
  3. The method according to claim 1,
    The system monitoring and control unit
    Wherein the sensing value of the first voltage / current sensor is normal and the sensing value of the second voltage / current sensor is abnormal, it is determined that an abnormality has occurred in the system, and a control notification according to the user's manual is performed. Power supply system.
  4. delete
  5. delete
  6. delete
KR20120130215A 2012-11-16 2012-11-16 Control Operating System And Method for Energy Development Source KR101480770B1 (en)

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CN105633959B (en) * 2016-03-04 2019-02-12 易事特集团股份有限公司 Uninterruptible power system and its control method
KR20180007673A (en) * 2016-07-13 2018-01-23 주식회사 루비 Hybrid energy storage system
US10700521B2 (en) 2017-04-28 2020-06-30 Lsis Co., Ltd. Hierarchical type power control system
US20190341802A1 (en) * 2018-05-03 2019-11-07 General Electric Company System and method for controlling auxiliary power supply

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KR20160139533A (en) 2015-05-28 2016-12-07 주식회사 우창엔지니어링 Uninterruptible power supply apparatus and method thereof
WO2017043754A1 (en) * 2015-09-11 2017-03-16 한국전력공사 Electronic watt-hour meter for transmitting power failure information in real-time and method for transmitting power failure information in real-time

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