KR20150016806A - Apparatus for controlling power supply with uninterruptible power supply function - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control apparatus, and more particularly, to a power control apparatus and a power control apparatus, which connect a switch capable of automatically switching between a system for supplying power to a load, And a switch that is automatically closed when an abnormality occurs in a system for supplying power to the load is connected between the self-sustaining output port of the power generator and the load, It is possible to continuously supply electric power and to operate a stable and reliable system. Also, since the power generation apparatus continuously generates power and supplies power to the load, it is possible to increase the efficiency and utilization rate of the power generation apparatus To a power control apparatus having a UPS function.

Description

[0001] APPARATUS FOR CONTROLLING POWER SUPPLY WITH UNINTERRUPTIBLE POWER SUPPLY FUNCTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control apparatus, and more particularly, to a power control apparatus having a UPS function of supplying power to the load uninterruptedly in the event of an abnormality in a system.

A typical UPS equipment is a combination of a DC power source device, a DC battery, and a power conversion device. When a converter included in the power conversion device converts an AC power source into a DC current, the DC battery charges the DC current, The inverter included in the power conversion apparatus inverts the direct current into a stable alternating current to supply the alternating current power of a predetermined voltage constant frequency to the load and discharges the direct current charged with the alternating current power when the alternating current power is out of power, Means an apparatus for supplying power to the load uninterruptedly by inversely converting the direct current discharged from the DC battery into an alternating current by an inverter to supply power to the load.

1 shows a circuit diagram of a conventional solar PCU to which a UPS function is applied.

As shown in FIG. 1, a conventional solar PCU to which a UPS function is applied is connected to a system through an inverter included in the solar power generator. The overall circuit configuration is similar to that of the conventional solar PCU, Relay 3 and Relay 4 for the self-supporting operation mode are added between the generator and the generator.

The self-standing operation mode refers to a function in which the power generation device is directly connected to the load, and the power generation device supplies power to the load regardless of the system. The load is supplied with power from the power generation device through the self-sustaining operation mode, and even when an abnormality occurs in the system, the load can be supplied with power through the power generation device in an uninterrupted manner. If there is no abnormality in the system, the power of the photovoltaic power generation device is supplied to the system through Relay 1 and Relay 2. Relay 1, Relay 2, Relay 3, and Relay 4 switches are used to switch to the self-sustaining operation mode when abnormality occurs in the system. Each switch is a reed switch, which is opened and closed by manual control of the user . That is, in order for the power generator to supply power to the load, a manual control of the user for each of the switches is required. Also, a load for receiving power through uninterruptible power supply through the power generator is connected to the Outlet of V1 and U1.

In the case of the related art, there is an inconvenience that the user must manually change the operation mode in order to use the self-sustaining operation mode of the power generation device, and the operation mode must be changed even when the system is restored. In addition, there is an inconvenience that the load for use must be directly connected to the output terminal of the generator.

Accordingly, the present specification discloses a power supply system that connects a switch that is capable of automatically switching between a system that supplies power to a load and the load, and an autonomous output port of the power generation apparatus associated with the system, And to provide a power control device having a UPS function for controlling power to be supplied to the load in an uninterrupted manner.

A power control apparatus having a UPS function according to an embodiment described herein includes a first switch connected between a system for supplying power to a load and the load; A second switch connected between the self-sustaining output port of the generator and the load associated with the system; And automatically controlling the first switch and the second switch so as to cut off power supply from the system to the load by opening the first switch when the system abnormality occurs, And a control unit for supplying electric power to the load with the power generation device.

In an embodiment, the first switch and the second switch are non-contact switches.

In an embodiment, the control unit includes a monitoring unit for monitoring abnormality of the system based on a relay installed in the system.

In an embodiment, the control unit includes a communication unit for transmitting operation information of the system and operation information of the power generation apparatus to and from the system.

In the embodiment, the control unit is characterized in that, when the system is operating normally, the first switch is closed and the second switch is open so that power is supplied from the system to the load .

In an embodiment, the control unit generates a list in which priority is set for a plurality of loads supplied with power from the system, and supplies power to the plurality of loads according to a priority order when an abnormality occurs in the system .

Meanwhile, a power control method having a UPS function according to an embodiment described in the present specification for realizing the above-mentioned problems includes a step of supplying power to a load, a step of generating an abnormality in the load, The first switch connected to the generator is opened, the second switch connected between the generator and the load is closed, and the generator supplies power to the load.

In an embodiment, in the step of powering the system with the load, electric power generated in the power generation system is sent to the system, and the system supplies the power to the load.

In the embodiment, at least one of maintenance, inspection, occurrence of an accident, and change of operation plan occurs in the system in an anomaly occurrence step in the system.

In the embodiment, at the first switch opening step, when an abnormality occurs in the system, the control unit included in the power generation apparatus opens the first switch connected between the system and the load, The power supply of the power source is interrupted.

In the embodiment, in the second switch closing step, when an abnormality occurs in the system, and when the first switch is opened, the control unit included in the power generation apparatus is connected to the second switch Is closed.

In the embodiment, when an abnormality occurs in the system and the first switch is opened in the step of supplying power to the power generator, the control unit included in the power generator is connected to the power generator And the second switch is closed to supply power from the power generation device to the load.

In addition, a power control method that is recovered after an anomaly in the system is recovered includes the steps of: supplying power to the load by the power generation device; opening the second switch; closing the first switch; And powering the load.

In the embodiment, in the power supply step of the power generation device, the system can not supply power to the load due to an abnormality in the system, and the power generation device supplies power to the load.

In the embodiment, in the system abnormal recovery step, the abnormal state occurring in the system is restored and power can be supplied from the system to the load.

In the embodiment, in the second switch open step, when the system is recovered from the abnormal state, the control unit included in the power generation apparatus opens the second switch connected between the power generation apparatus and the load, The power supply to the load is interrupted.

In the embodiment, in the first switch closing step, the system is recovered from the abnormal state, and when the second switch is opened, the control unit included in the power generation apparatus is connected to the first And the switch is closed.

In the embodiment, in the power supply step of the system to the load, when the system is recovered from the abnormal state and the second switch is opened, the control unit included in the power generation apparatus is connected to the power generation apparatus And the first switch is closed to supply power from the system to the load.

A power control apparatus having a UPS function disclosed in this specification includes a system for supplying power to a load and a first switch connected between the load and a second switch connected between the self- So that it is possible to solve the problem of manual switching of the self-sustaining mode of the prior art.

Further, when an abnormality occurs in a system that supplies power to the load, a switch that is automatically closed is connected between the self-sustaining output port of the power generation apparatus and the load, thereby power can be supplied to the load uninterruptedly, And reliable system operation is enabled.

In addition, the power generation apparatus continuously generates power and supplies power to the load, thereby improving efficiency and utilization of the power generation apparatus.

1 is a circuit diagram of a conventional solar PCU having a UPS function.
2 is a configuration diagram of a power control apparatus having a UPS function disclosed in this specification;
3 is a detailed configuration diagram of a control unit included in the power control apparatus having the UPS function disclosed in this specification.
4 is a flow chart of the power control method having the UPS function disclosed in this specification 1.
5 is a flow chart of the power control method having the UPS function disclosed in this specification;

The techniques disclosed herein can be applied to grid-connected power generation systems and power systems. However, the technology disclosed in this specification is not limited thereto, and can be applied to all power generation devices, power systems, emergency power generation systems, and other new and renewable energy generation systems to which the technical idea of the above technology can be applied. In particular, renewable energy generation is an eco-friendly development using renewable energy. For example, solar power generation, solar power generation, biomass generation, small hydro power generation, marine energy generation, waste energy generation, geothermal generation, Power generation, and the like.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the scope of the technology disclosed herein. Also, the technical terms used herein should be interpreted as being generally understood by those skilled in the art to which the presently disclosed subject matter belongs, unless the context clearly dictates otherwise in this specification, Should not be construed in a broader sense, or interpreted in an oversimplified sense. In addition, when a technical term used in this specification is an erroneous technical term that does not accurately express the concept of the technology disclosed in this specification, it should be understood that technical terms which can be understood by a person skilled in the art are replaced. Also, the general terms used in the present specification should be interpreted in accordance with the predefined or prior context, and should not be construed as being excessively reduced in meaning.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprising ", or" comprising "and the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals denote like or similar elements, and redundant description thereof will be omitted.

Further, in the description of the technology disclosed in this specification, a detailed description of related arts will be omitted if it is determined that the gist of the technology disclosed in this specification may be obscured. It is to be noted that the attached drawings are only for the purpose of easily understanding the concept of the technology disclosed in the present specification, and should not be construed as limiting the spirit of the technology by the attached drawings.

First, the configuration of a power control apparatus (hereinafter referred to as a power control apparatus) having a UPS function disclosed in this specification will be described with reference to FIG. 2 and FIG.

2 is a configuration diagram of a power control apparatus having a UPS function disclosed in this specification.

3 is a detailed configuration diagram of a control unit included in the power control apparatus having the UPS function disclosed in this specification.

2, the power control apparatus includes a system 20 for supplying power to the load 30 and a first switch 40 connected between the load 30 and the load 30, A second switch 50 connected between the self-sustaining output port 15 of the power generation apparatus 10 and the load 30, the first switch 40 and the second switch 50, The power supply from the system (20) to the load (30) is cut off by opening the first switch (40) when the abnormality occurs in the system (20), and the second switch And a control unit (60) for supplying power to the load (30) to the apparatus (10).

The power generation apparatus 10 includes a generator connected to the load 30 via the autonomous output port 15 for supplying power to the system 20 and for supplying generated power to the system and the load, Power plants and generation facilities.

The power generation apparatus 10 may be at least one of solar power generation, solar power generation, biomass power generation, small hydro power generation, marine energy generation, geothermal power generation, wind power generation, and fuel cell power generation.

The system (20) receives power from the power generation device (10) and supplies the power to the load (30), wherein a plurality of power plants, a substation, and a transmission / distribution line are integrated, .

The load 30 means a receptacle or receptacle group and an accommodation facility in which power is supplied from the system 20 and the power is consumed.

The first switch (40) and the second switch (50) are non-contact switches and can be automatically controlled by the control unit (60) included in the power generator (10).

Here, the contactless switch is a switch which does not have a contact point such as a mechanical switch which is generally used. Since there is no consuming of the contact and there is no moving part, the contactless switch has a long life and can be operated very quickly, Switch.

The first switch 40 and the second switch 50 are used as a non-contact switch so that automatic control and automatic opening and closing of the first switch 40 and the second switch 50 can be performed.

The first switch (40) and the second switch (50) are in different states.

For example, when the first switch 40 is open, the second switch 50 is in a closed state. When the first switch 40 is in a closed state, the second switch 50 50 may be in an open state.

The first switch (40) and the second switch (50) simultaneously perform different opening and closing operations.

For example, when the first switch 40 performs an opening operation, the second switch 50 performs a closing operation. When the first switch 40 performs a closing operation, the second switch 50 50 may be open-circuited.

If an abnormality occurs in the system 20, it may be at least one of maintenance, inspection, accident occurrence, and operation plan change of the system 20.

For example, when a disconnection accident occurs in the system 20, the control unit 60 opens the first switch 40 connected between the system 20 and the load 30, 20) to the load (30) while closing the second switch (50) connected between the self-sustaining output port (15) of the power generation apparatus (10) and the load (30) Power can be supplied to the load (30) by the power generation device (10).

As shown in Fig. 3, the control unit 60 may include a monitoring unit 61. Fig.

The monitoring unit 61 can monitor the occurrence of an abnormality in the system 20 based on the relay installed in the system 20.

Wherein the relay is a protection relay that detects the abnormal state and protects the electric circuit when an abnormal state occurs in the electric circuit, the relay includes a voltage relay, a current relay, a frequency relay, a temperature relay, a power relay, a distance relay, A ground fault relay, a short circuit relay, or a combination thereof.

For example, when a ground fault occurs in the system 20, the ground fault relay installed in the system 20 detects the ground fault, The control unit 60 detects an accident of the system 20 from the monitoring unit 61 through the detection of the relay so that the control unit 60 opens the first switch 40 from the system 20, It is possible to interrupt the power supply to the load 30 and at the same time to close the second switch 50 to supply power to the load 30 to the power generation apparatus 10. [

In addition, the control unit 60 may include a communication unit 62.

The communication unit 62 can transmit operation information of the system 20 and operation information of the power generation apparatus 10 to and from the system 20.

The communication between the communication unit 62 and the system 20 can be performed by any one of a wired communication method and a wireless communication method.

The wired communication includes a public switched data network (PSDN), an integrated services digital network (ISDN), an asymmetric digital subscriber line (ADSL), a very high-data rate digital subscriber line (VDSL), an Ethernet, Communication) can be done in various ways.

The wireless communication refers to a communication method of communicating information such as signals, codes, images, and sounds through radio waves without passing through electric wires. The wireless communication includes not only communication methods of mobile communication services applied to terminals, but also WIBRO, (WCDMA), Zigbee, UWB (Ultra Wide Band), WiFi (Wireless Fidelity), World Interoperability for Microwave Access (IRDA), Infrared Data Association (IRDA) (Radio Frequency), Bluetooth, Mobile Computing, Trunked Radio System (TRS), and IEEE1394.

The system 20 may be connected to the communication unit 61 via the communication unit 61 so that the system 20 can communicate with the system 20 via the communication unit 61. [ The control unit 60 transmits the maintenance plan information from the system 20 to the load 20 via the first switch 40 because the communication unit 61 receives the maintenance plan information, 30) and at the same time, the second switch (50) can be closed to supply power to the load (30) to the power generator (10).

The communication unit 61 communicates the operation information of the system 20 and the operation information of the power generation apparatus 10 to the load 20 that receives power from the system 20 or the power generation apparatus 10. [ Lt; / RTI >

For example, in a state before the abnormality occurs in the system 20, the communication unit 61 receives power from the system 20 while the load 30 is receiving power from the system 20, (20) to the customer of the load (30) to which the load (30) is supplied, indicating that the load of the load (30) is in the state of power supply from the system .

Alternatively, when an abnormality occurs in the system (20), the communication unit (61) supplies power from the power generation device (10) while the load (30) The supply of the load 30 receives the operation information indicating that electric power is being supplied from the electric power generating apparatus 10 so that the consumer of the load 30 is in a state of supplying electric power from the electric power generating apparatus 10 .

The control unit 60 closes the first switch 40 and opens the second switch 50 to disconnect the load 20 from the system 20 when the system 20 is operating normally. 30 to be supplied with power.

For example, in a state in which power is supplied from the system 20 to the load 30 until the abnormality occurs in the system 20, the control unit 60 controls the first switch 40 And power is supplied from the system 20 to the load 30 without supplying power to the load 30 to the power generation apparatus 10 with the second switch 50 being opened, .

Or when the control unit 60 has supplied power to the load 30 to the power generator 10 in the event that the control system 60 has recovered after the occurrence of an abnormality in the system 20, The electric power is not supplied to the load (30) by the power generation device (10) by opening the second switch (50) which has been closed and the first switch (40) 20 to supply power to the load 30.

The control unit 60 may be configured to supply power to the power generation apparatus 10 when an abnormality occurs in the system 20 according to a priority set for a plurality of loads supplied with power from the system 20 Can be controlled.

For example, when there is a load a set in a first order and a load b set in a second order in the load 30, if the control unit 60 abnormally occurs in the system 20, the first switch 40 The power supply from the system 20 to the load 30 is cut off and the second switch 50 is closed to supply power to the load 30 to the power generation apparatus 10, So that power is firstly supplied to the load a set in the first order.

Meanwhile, a power control method having a UPS function according to an embodiment described in the present specification for realizing the above-mentioned problems includes a step of supplying power to a load, a step of generating an abnormality in the load, The first switch connected to the generator is opened, the second switch connected between the generator and the load is closed, and the generator may supply electric power to the load.

Hereinafter, a power control method (hereinafter referred to as a power control method) having the UPS function disclosed in this specification will be described with reference to Figs. 4 and 5. Fig.

4 is a flow chart 1 of the power control method with UPS function disclosed herein.

5 is a flowchart 2 of a power control method having a UPS function disclosed in this specification.

As shown in Fig. 4, in the power supply step S10 of the system, power generated in the power generation apparatus is sent to the system, and the system can supply the power to the load.

In this case, the first switch connected between the system and the load is closed, the power is supplied from the system to the load, and the second switch connected between the power generation apparatus and the load is in an open state, Power may not be supplied to the load from the power generation device.

In the anomaly occurrence step S20, at least one of maintenance, inspection, accident occurrence, and operation plan change in the system may occur.

For example, in case of ground fault, lightning accident, burnout accident, short circuit accident, overload accident, equipment obsolescence, equipment replacement work, periodical inspection, substation fault, power plant fault, power generation weakness, power supply emergency, Lt; / RTI >

In the first switch open step S30, when an abnormality occurs in the system, the control unit included in the power generation apparatus opens the first switch connected between the system and the load to open the first switch from the system to the load The power supply can be cut off.

In the second switch closing step (S40), when an abnormality occurs in the system and the first switch is opened, the control unit included in the power generation apparatus switches the second switch connected between the power generation apparatus and the load It can be closed.

The first switch open step S30 and the second switch closed step S40 may be included in the control step S35 of the control unit included in the power generation apparatus.

The control unit controls the opening and closing of the first switch and the second switch so that the control unit can control the power supply to the load according to the power control method.

The first switch open step S30 and the second switch closed step S40 may be concurrently performed and the first switch open step S30 and the second switch closed step S40 may be performed simultaneously The steps can be performed simultaneously with other operations.

When an abnormality occurs in the system and the first switch is opened in a power supply step (S50) of supplying power to the power generation apparatus, the control unit included in the power generation apparatus is connected to the power generation apparatus 2 switch can be closed to supply power to the load from the power generation device.

In this case, the first switch connected between the system and the load is open, the power supply from the system to the load is cut off, and the second switch connected between the power generation apparatus and the load is closed, Power can be supplied to the load from the power generation device.

The power control method according to claim 1, wherein the power is supplied to the load by the power generation device, the step of opening the second switch, the step of closing the first switch, And powering the power supply.

As shown in FIG. 5, in the power supply step (S50) of the power generation apparatus, the system can not supply power to the load due to an abnormality in the system, and the power generation apparatus can supply power to the load have.

In this case, the second switch connected between the power generation apparatus and the load is closed, the power is supplied from the power generation apparatus to the load, and the first switch connected between the system and the load is opened , The power supply to the load from the system can be interrupted.

In the system abnormal recovery step (S60), the abnormal state occurring in the system can be restored and power can be supplied from the system to the load.

In the second switch open step S40 ', when the system is recovered from the abnormal state, the control unit included in the power generation apparatus opens the second switch connected between the power generation apparatus and the load, The power supply to the load can be cut off.

In the first switch closing step S30 ', the system is recovered from the abnormal state, and when the second switch is opened, the control unit included in the power generation apparatus is connected to the first The switch can be closed.

The first switch closing step S30 'and the second switch opening S40' may be included in the control step S35 of the control unit included in the power generation apparatus.

The first switch closing step S30 'and the second switch closing step S40' may be concurrently performed and the first switch closing step S30 'and the second switch closing step S40 'Can be performed simultaneously with different operations.

In the power supply step (S10) of the system, the system is recovered from the abnormal state, and when the second switch is opened, the control unit included in the power generation apparatus is connected to the power generation apparatus 1 switch can be closed to supply power to the load from the system.

In this case, the first switch connected between the system and the load is closed, the power is supplied from the system to the load, and the second switch connected between the power generation apparatus and the load is in an open state, Power supply to the load from the power generation device can be interrupted.

Embodiments of the power control apparatus having UPS functions disclosed herein may be implemented in conjunction with the power control apparatus and one or more of the systems 20. [

Embodiments of the power control apparatus having the UPS function disclosed in this specification can be implemented by a plurality of the power generation apparatus 10 and the power control apparatus.

Embodiments of power control devices having UPS functions disclosed herein may be implemented for residential, building, utility, industrial, and emergency power applications.

The power control apparatus having the UPS function described in the present specification is provided with the first switch 40 connected between the system 20 that supplies power to the load 30 and the load 30, The second switch 50 connected between the self-supporting output port 15 of the power generator 10 and the load 30 can be automatically switched to solve the problem of manual switching of the self-sustaining mode of the prior art. There is an effect.

When an abnormality occurs in the system 20 that supplies power to the load 30, a switch that is automatically closed is connected between the self-sustaining output port 15 of the power generation apparatus 10 and the load 30 Power can be supplied to the load 30 in an uninterrupted manner, thereby enabling continuous power supply and stable and reliable system operation.

In addition, since the power generation device 10 continuously generates power and supplies power to the load 30, the efficiency and utilization of the power generation device 10 are increased.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present invention without departing from the spirit or scope of the present invention as defined by the appended claims. It will be appreciated that such modifications and variations are intended to fall within the scope of the following claims.

10: generator 15: self-sustaining output port
20: System 30: Load
40: first switch 50: second switch
60: control unit 61:
62: communication unit S10: power supply step to the system load
S20: Abnormal generation in the system S30: First switch open step
S30 ': first switch closing step S35: control step of the control unit
S40 ': to the second switch opening step S40: the second switch closing step
S50: Power generation step to supply power to the load

Claims (6)

A first switch connected between the load and a system for supplying power to the load;
A second switch connected between the self-sustaining output port of the generator and the load associated with the system; And
The first switch and the second switch are automatically controlled so as to shut off the power supply from the system to the load by opening the first switch when abnormality occurs in the system, And a control unit for supplying power to the load with the power generation device. The method according to claim 1,
Wherein the first switch and the second switch comprise:
Wherein the power switch is a non-contact switch. The method according to claim 1,
Wherein the control unit comprises:
And a monitoring unit monitoring an abnormality of the system based on a relay installed in the system. The method according to claim 1,
Wherein the control unit comprises:
And a communication unit for transmitting / receiving operation information of the system and operation information of the power generation device to / from the system. The method according to claim 1,
Wherein the control unit comprises:
When the system is operating normally,
Wherein the first switch is closed and the second switch is open so that power is supplied from the system to the load. The method according to claim 1,
Wherein the control unit comprises:
And power is supplied to the power generation apparatus when abnormality occurs in the system according to a priority set for a plurality of loads supplied with power from the system.

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