KR101642235B1 - A Management Apparatus for Regenerated Energy - Google Patents

A Management Apparatus for Regenerated Energy Download PDF

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Publication number
KR101642235B1
KR101642235B1 KR1020150159034A KR20150159034A KR101642235B1 KR 101642235 B1 KR101642235 B1 KR 101642235B1 KR 1020150159034 A KR1020150159034 A KR 1020150159034A KR 20150159034 A KR20150159034 A KR 20150159034A KR 101642235 B1 KR101642235 B1 KR 101642235B1
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South Korea
Prior art keywords
regenerative energy
load
power supply
commercial power
regenerative
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KR1020150159034A
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Korean (ko)
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오주환
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리얼테크(주)
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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
    • H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc 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
    • H02J3/04—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
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
    • H02P3/14—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor by regenerative braking

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

A regenerative energy management device is provided. A regenerative energy management device includes a regenerative energy sensor connected between a commercial power source for converting and supplying a commercial power source to a commercial power source and detecting whether or not the regenerative energy generated from the motor is stored, The AC / DC converter for converting the commercial power to DC and regenerating regenerative energy from the motor, and a battery for storing the regenerative energy, wherein the AC / And the regenerative energy detection sensor may be connected between the commercial power source and the AC / DC converter.

Figure R1020150159034

Description

[0001] The present invention relates to a regenerative energy management apparatus,

The present invention relates to a regenerative energy management device, and more particularly, to a system configured by a commercial power source, a power conversion device for converting a commercial power source into a power source for a motor, and a motor connected to the power conversion device, The present invention relates to a regenerative energy management apparatus having a regenerative energy sensor for sensing whether or not a regenerative energy is stored.

As the fossil energy resources become depleted and the severity of climate change due to greenhouse gases becomes increasingly serious, environmentally friendly, low-carbon industries are attracting attention. For example, alternative resources using renewable energy such as solar energy and wind energy have been actively developed, and studies for improving the system efficiency have been actively conducted.

Recently, researches on the regenerative energy management field which recycles the regenerative energy generated from the motor as eco-friendly technology have been attracting attention. The regenerative energy can be generated in a drive system in which an electric motor is used, for example, an elevator drive system, a port container crane system, a crane drive system for construction equipment, a factory electric motor brake system,

For example, in the case of an elevator, the regenerative energy may occur while the motor is rotating due to inertia even if the power supplied to the elevator motor is cut off for elevation stop.

1 to 3 show a conventional regenerative energy management apparatus.

1, a conventional motor drive system includes a commercial power source 11, a power conversion unit 20 that receives the commercial power source 11 through a distribution line 12 and converts the power into electric power for the motor 30, And a motor 30. The power conversion unit 20 may include an AC / DC rectifier 22 and a DC / AC inverter 24. [

The conventional regenerative energy management apparatus includes a DC / DC converter 40 connected to a node between the AC / DC rectifier 22 and the DC / AC inverter 24, and a battery 50 for storing regenerative energy .

2, the conventional regenerative energy management apparatus may include a regenerative unit 60 connected to a node between the AC / DC rectifier 22 and the DC / AC inverter 24. [ The regenerative unit (60) can generate regenerative energy and supply it to the distribution line (12).

The conventional regenerative energy management apparatus described with reference to Figs. 1 and 2 has a problem that the switching noise affects the inverter, thereby reducing the life of the inverter or causing malfunctions. In other words, when the node between the AC / DC rectifier 22 and the DC / AC inverter 24 and the regenerative energy management device are connected, there is a great risk of reducing the life of the inverter or causing malfunction due to generation of the strain inductance.

Therefore, in order to protect the inverter in the conventional system, the power conversion unit and the regenerative energy management device have to be located at a close distance, for example, 5 m or less. In other words, since the power conversion unit and the regenerative energy management device are located close to each other, it is difficult to secure an installation space.

3, the conventional regenerative energy management apparatus may include a power conversion unit 20 including an AC / DC converter 26 and a DC / AC inverter 24. At this time, the AC / DC converter 26 can generate regenerative energy and supply it to the distribution line 12. However, the regenerative energy management device referenced in Fig. 3 has a limitation that it can not store regenerative energy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a regenerative energy management device that is excellent in freedom of installation and ease of installation.

It is another object of the present invention to provide a regenerative energy management device that provides stored regenerative energy to a load in synchronization with a commercial power source.

It is another object of the present invention to provide a regenerative energy management device that minimizes a circulating current.

The technical problem to be solved by the present invention is not limited to the above.

A regenerative energy management apparatus according to an exemplary embodiment of the present invention includes a power conversion unit for converting and supplying a commercial power source to a commercial power source and a regenerative energy sensing unit for sensing whether the regenerative energy generated from the motor is stored, An AC / DC converter for converting the commercial power to a direct current and regenerating regenerative energy from the motor; and an AC / DC converter for converting the commercial power into a direct current and regenerating regenerative energy from the motor, and a battery for storing the regenerative energy when the sensor and the regenerative circuit breaker are in an on state. And a DC / AC inverter provided between the AC / DC converter and the motor, wherein the regenerative energy sensor can be connected between the commercial power source and the AC / DC converter.

According to one embodiment, the regenerative energy management apparatus further includes a power supply unit that supplies regenerative energy stored in the battery to a load connected to the commercial power supply and includes a load system sensor, Wherein the power supply unit is connected between a load circuit breaker that opens and closes the commercial power supply to the load and the power supply unit supplies the regenerative energy to the load by sensing the power characteristic from the commercial power supply to the load via the load system sensor To provide power synchronized to the power characteristics from the commercial power source to the load.

According to one embodiment, according to one embodiment, the regenerative energy management apparatus further includes a power supply unit that supplies regenerative energy stored in the battery to a load connected to the commercial power supply and includes a load system sensor, Wherein the sensor is connected between the commercial power supply and a load breaker that opens and closes the commercial power supply to the load, wherein the power supply unit supplies the regenerative energy to the load through the load system sensor, Wherein said load circuit breaker comprises: a load circuit breaker for detecting a power characteristic of said load, and for providing power between said load circuit breaker and said load synchronized with a power characteristic from said commercial power source to said load, It is possible to sense the power characteristic of the commercial power supply even when supplied to the load.

According to one embodiment, the regenerative energy management apparatus further includes a power supply unit for supplying regenerative energy stored in the battery to a load connected to the commercial power supply, and a transformer in the path for supplying the regenerative energy to the load from the power supply unit can do.

According to one embodiment, the regenerative energy management apparatus further includes a regenerative energy source changeover switch, wherein the regenerative energy source changeover switch is provided between the commercial power source and the AC / DC converter and between the AC / DC converter and the DC / The regenerative energy can be selectively provided among the nodes between the AC inverters.

A regenerative energy management apparatus according to another exemplary embodiment of the present invention includes a power conversion device that converts and supplies a commercial power source to a motor and a regenerative energy sensing unit that is connected between the commercial power source and senses whether or not the regenerative energy generated from the motor is stored. And an AC / DC rectifier for converting the commercial power to a direct current, and an AC / DC rectifier for converting the commercial power to a direct current, and a battery for storing the regenerative energy when the sensor and the regenerative circuit breaker are in an on state. And a regenerative unit connected between the AC / DC rectifier and the DC / AC inverter to provide the regenerative energy between the commercial power source and the AC / DC rectifier, wherein the regenerative energy sensor May be connected between the commercial power source and the AC / DC rectifier.

According to another embodiment, the regenerative energy management apparatus further comprises a power supply unit supplying a regenerative energy stored in the battery to a load connected to the commercial power supply, the power supply unit including a load system sensor, Wherein the power supply unit is connected between a load circuit breaker that opens and closes the commercial power supply to the load and the power supply unit supplies the regenerative energy to the load by sensing the power characteristic from the commercial power supply to the load via the load system sensor To provide power synchronized to the power characteristics from the commercial power source to the load.

According to another embodiment, the regenerative energy management apparatus further comprises a power supply unit supplying a regenerative energy stored in the battery to a load connected to the commercial power supply, the power supply unit including a load system sensor, Wherein the power supply unit is connected between a load circuit breaker for opening and closing the commercial power supply to the load and the power supply unit supplies the regenerative energy to the load so that power characteristics from the commercial power supply to the load Sensing the power of the power supply from the commercial power supply to the load and supplying the power synchronized with the power characteristic from the commercial power supply to the load between the load circuit breaker and the load, The power characteristics of the commercial power supply can be sensed.

According to another embodiment, the regenerative energy management apparatus further includes a power supply unit for supplying regenerative energy stored in the battery to a load connected to the commercial power supply, and a transformer in the path for supplying the regenerative energy from the power supply unit to the load can do.

According to another embodiment, the regenerative energy management apparatus further includes a regenerative energy source changeover switch, wherein the regenerative energy source changeover switch is provided between the commercial power source and the AC / DC converter and between the AC / DC converter and the DC / The regenerative energy can be selectively provided among the nodes between the AC inverters.

The regenerative energy management apparatus according to an embodiment of the present invention may provide a regenerative energy sensing sensor connected to a node between a commercial power source and a current conversion unit. As a result, the regenerative energy storage unit can be located remotely from the gas flow conversion unit, so that the degree of freedom of installation is improved, and parallel installation is possible in the commercial power distribution panel, so that the ease of installation can be improved.

Further, the regenerative energy management apparatus according to an embodiment of the present invention can reduce the consumption of commercial power by providing the stored regenerative energy as a load.

Also, the regenerative energy management apparatus according to an embodiment of the present invention can continuously measure the power characteristics of the commercial power supply by providing the stored regenerative energy as a load, thereby improving the characteristics of the commercial power and the regenerative energy The difference can be minimized.

In addition, the regenerative energy management apparatus according to an embodiment of the present invention further includes a transformer in providing the stored regenerative energy as a load, thereby minimizing the circulating current.

In addition, the regenerative energy management device according to an embodiment of the present invention includes a regenerative energy changeover switch, thereby selectively providing a regenerative energy source.

1 to 3 are views for explaining a conventional regenerative energy management apparatus.
4 is a view for explaining a regenerative energy management apparatus according to the first embodiment of the present invention.
5 is a view for explaining a regenerative energy management apparatus according to a second embodiment of the present invention.
6 is a view for explaining a regenerative energy management apparatus according to a third embodiment of the present invention.
7 is a view for explaining a regenerative energy management apparatus according to a fourth embodiment of the present invention.
8 is a view for explaining a regenerative energy management apparatus according to a fifth embodiment of the present invention.
9 is a view for explaining a regenerative energy management apparatus according to a sixth embodiment of the present invention.
10 is a view for explaining a regenerative energy management apparatus according to a seventh embodiment of the present invention.
11 is a view for explaining a regenerative energy management apparatus according to an eighth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween.

Also, while the terms first, second, third, etc. in the various embodiments of the present disclosure are used to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Also, in this specification, 'and / or' are used to include at least one of the front and rear components.

The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprises "or" having "are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof.

Also, in this specification, the term "connection " is used to include both indirectly connecting and directly connecting a plurality of components. Also, the term "connection" is a concept including a physical connection as well as an electrical connection.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

A regenerative energy management apparatus according to an embodiment of the present invention is described. The regenerative energy management apparatus according to the first to fourth embodiments of the present invention will be described with reference to Figs. 4 to 7, in which the power conversion unit 120 includes the AC / DC converter 122 and the DC / AC inverter 124, And the like.

The AC / DC converter 122 of the power conversion unit 120 is connected to the commercial power supply 110 through the distribution line 190. The AC / Can be converted into a DC component. The power source having passed through the AC / DC converter 122 can be smoothed while passing through the capacitor. The DC / AC inverter 124 can supply AC to the drive motor 130 in accordance with the driving conditions of the motor 130. For example, the DC / AC inverter 124 may provide single- or three-phase alternating current to the motor 130.

Hereinafter, a regenerative energy management apparatus applied to the power conversion unit 120 configured by the AC / DC converter 122 and the DC / AC inverter 124 will be described in detail.

4 is a view for explaining a regenerative energy management apparatus according to the first embodiment of the present invention.

Referring to FIG. 4, the regenerative energy management apparatus 100 according to the first embodiment of the present invention may include a regenerative energy storage unit 140.

The regenerative energy storage unit 140 may provide a function of sensing and storing regenerative energy generated in the power converter 120. [ The regenerative energy storage unit 140 includes a regenerative energy sensor 142, an input filter 144, an input reactor 146, an AC / DC converter 148, a battery 150, . ≪ / RTI >

The regenerative energy sensor 142 is connected between the power converter 120 for converting and supplying the commercial power 110 to the motor 130 and the commercial power supply 110, It is possible to detect whether or not the regenerative energy is stored. More specifically, the regenerative energy sensor 142 may be connected to the node between the commercial power source 110 and the AC / DC converter 122 of the power inverter 120 to detect whether the regenerative energy is generated . For example, when the current and / or voltage of the sinusoidal wave and / or the square wave is sensed, the regenerative energy sensor 142 may sense that the regenerative energy is generated.

The regenerative circuit breaker 192 may operate on or off according to a sensing signal of the regenerative energy sensor 142. That is, when the regenerative energy is generated, the regenerative circuit breaker 192 is turned on, and when the regenerative energy is not generated, the regenerative circuit breaker 192 can be turned off. The regenerative breaker 192 is connected between the commercial power source 110 and the regenerative energy storage unit 142 and more specifically between the commercial power source 110 and the input filter 144 of the regenerative energy storage unit 142. [ As shown in FIG. Accordingly, the regenerative circuit breaker 192 may provide a path for allowing the regenerative energy to be stored in the battery, or may separate the regenerative energy storage unit from the system.

The input filter 144 may remove the noise of the supplied regenerative energy. Specifically, the input filter 144 can minimize the influence of voltage and current having a high harmonic component generated during switching at a high frequency. The input reactor 146 receives regenerative energy from the input filter 144 and can control the voltage. The AC / DC converter 148 may receive regenerative energy from the input reactor and convert it into a direct current. The battery 150 may store regenerative energy supplied from the AC / DC converter 148.

The regenerative energy storage unit 140 may be controlled by a buck / boost controller 152. The buck / boost controller 152 may operate in a buck mode to store regenerative energy in the battery 150 when regenerative energy is generated. Alternatively, when the energy stored in the battery 150 is to be supplied to the load as a load due to a system malfunction or the like, the buck / boot controller 152 operates in the boost mode to change the energy of the battery 150 Power supply unit.

As described above, each configuration of the regenerative energy storage unit according to the first embodiment of the present invention has been described. Hereinafter, a method of driving the regenerative energy storage unit according to the first embodiment of the present invention will be described.

When regenerative energy is generated by the motor 130, current and / or voltage is sensed through a regenerative energy sensor 142 connected between the commercial power source 110 and the AC / DC converter 122. When the regenerative energy is sensed, the regenerative circuit breaker 192 is turned on so that the regenerative energy of the distribution line 190 can be provided to the input filter 144. The regenerative energy provided to the input filter 144 may be stored in the battery 150 via the input reactor 146 and the AC / DC converter 148.

If the regenerative energy storage unit 140 is connected between the AC / DC converter 122 and the DC / AC inverter 124, there is a high possibility that the device malfunctions or ages due to noise. Therefore, there is a limit that the regenerative energy storage unit 140 can be installed adjacent to the AC / DC converter 122 and / or the DC / AC inverter 124. As a result, the degree of freedom of installation is low and it is difficult to secure a space for installation. For example, since the elevator power conversion unit is usually installed in a narrow space, installation work is not easy and installation space is limited. Further, connecting the regenerative energy storing unit between the AC / DC converter 122 and the DC / AC inverter 124 has a difficulty in installation difficulty.

However, since the regenerative energy storage unit 140 according to the first embodiment of the present invention is connected between the commercial power source 110 and the AC / DC converter 122, the regenerative energy storage unit 140 is installed directly on the commercial power source 110 It is possible to provide an advantage that it is easy to install. Further, since no problem due to noise is caused, it is possible to install the power conversion unit at a remote place, and the degree of freedom of installation can be increased. Therefore, the regenerative energy storage unit 140 according to the first embodiment of the present invention can provide an effect of improving ease of installation and degree of freedom of installation.

Meanwhile, the commercial power source 110 may be connected to the load through the distribution line 190. For example, the commercial power supply 110 may be connected to the load through a load breaker. 4, the commercial power supply 110 is connected to the first load 160 through a first load breaker 194 and the commercial power supply 110 is connected to a second load breaker 193 The second load 162 may be connected to the second load 162. [

According to one embodiment, the regenerative energy management apparatus 100 according to the first embodiment of the present invention may include at least one power supply unit. The power supply unit may supply energy stored in the battery 150 to a load connected to the commercial power supply 110. For example, the power supply unit may provide the energy stored in the battery 150 to the load as an instantaneous power failure, a system fault, or as needed. At this time, the power supply unit may be provided singly or in plurality. When the power supply unit is provided in plurality, the first power supply unit 170 and the second power supply unit 180 may be provided as shown in the figure. The first power supply unit 170 may supply energy stored in the battery 150 to the first load 160 and the second power supply unit 180 may supply the energy stored in the battery 150 to the second load 162. [ (150). ≪ / RTI >

The first power supply 170 includes a first load system sensor 172, a first output filter 174, a first output reactor 176, a first DC / AC inverter 178 and a first supply breaker 195 ).

The load system sensor 172 may be coupled to a node between the first load 160 and a first load breaker 194 that blocks the utility power 110 to the load 160. The load system sensor 172 may measure a power supply characteristic, for example, a voltage magnitude and / or a frequency supplied from the commercial power supply 110 to the first load 160.

The first DC / AC inverter 174 may convert the power stored in the battery 150 into AC. The first output reactor 176 receives power from the first DC / AC inverter 174 and can control the voltage. The first output filter 178 receives power from the first output reactor 176 and can remove noise from the supplied power. The first supply circuit breaker 195 may operate on or off depending on whether the first power supply 170 supplies power to the first load 160.

The first power supply 170 may be controlled by a power supply controller 189. For example, the power supply controller 189 may determine whether to supply the energy of the battery 150 to the first load 160, The energy stored in the battery 150 can be supplied.

The configurations of the first power supply unit according to the first embodiment of the present invention have been described above. Hereinafter, a method of driving the power supply unit according to the first embodiment of the present invention will be described.

The power supply controller 189 controls the power supplied from the commercial power supply 110 to the first load 160 via the first load system sensor 172 when the first load circuit breaker 194 is on Characteristic information, for example, voltage magnitude and frequency can be measured. That is, the power supply controller 189 controls the first load circuit breaker 195 and the second load circuit breaker 194 via the first load system sensor 172 in a state in which the first supply circuit breaker 195 is in the off state and the first load circuit breaker 194 is kept in the on state, The power characteristic of the commercial power supply 110 can be measured.

When the power supply controller 189 determines to supply the power charged in the battery 150 to the first load 160, the power supply controller 189 supplies power from the battery 150 to the first DC / AC inverter 174, a first output reactor 176, and a first output filter 178 to the first load 160. In this case, the power supply controller 189 may convert the first load circuit breaker 194 from an ON state to an OFF state. Also, the power supply controller 189 may convert the first supply breaker 195 from the off state to the on state.

The first power supply 170 supplies the regenerative energy charged in the battery 150 to the first load 160. The first power supply 170 supplies the regenerative energy stored in the battery 150 to the first load 160, The power characteristic information supplied from the first load 110 to the first load 160 may be utilized. Accordingly, the first power supply unit 170 may provide the power synchronized with the power supplied from the commercial power supply 110 to the first load 160. [ In other respects, the first supply circuit breaker 195 enters the on state after the regenerative energy is synchronized with the commercial power supply 110, so that it is possible to supply stable power to the load.

Each configuration and operation method of the first power supply unit 170 and the configuration and operation method of the second power supply unit 180 correspond to each configuration and operation method of the first power supply unit 170 A detailed description thereof will be omitted.

The power supply unit according to the first embodiment of the present invention can minimize the consumption of commercial power by providing regenerative energy charged in the battery 150 to the load. Also. In providing the regenerative energy charged in the battery 150 to the load, it is provided in synchronization with the power characteristics between the commercial power source and the load, thereby improving the operational safety.

Hereinafter, a regenerative energy management apparatus according to a second embodiment of the present invention will be described with reference to FIG. The load system sensor of the regenerative energy management apparatus according to the first embodiment of the present invention is connected to the node between the load circuit breaker and the load to measure the power characteristic of the system, while the regenerative energy management apparatus according to the second embodiment of the present invention, The load system sensor of the present invention can be roughly classified in that it measures the power characteristic of the system by being connected to the node between the commercial power supply and the load breaker.

5 is a view for explaining a regenerative energy management apparatus according to a second embodiment of the present invention. 5, a configuration using the same reference numerals as those shown in FIG. 4 among the constituent elements shown in FIG. 5 will be described with reference to FIG. 5. In the regenerative energy management apparatus according to the second embodiment of the present invention, Since it corresponds to the configuration described in the first embodiment of the invention, a detailed description thereof will be omitted. For example, the power conversion unit 120 and the regenerative energy storage unit 140 shown in FIG. 5 may correspond to the power conversion unit 120 and the regenerative energy storage unit 140 shown in FIG. 4, respectively. Hereinafter, a regenerative energy management apparatus according to a second embodiment of the present invention will be described, focusing on a configuration that is generally similar to that of the first embodiment of the present invention.

Referring to FIG. 5, the regenerative energy management apparatus 200 according to the second embodiment of the present invention includes a power supply unit, and the power supply unit may include a load-based sensor connected to a node between the commercial power and the load- have.

More specifically, the first load system sensor 172 of the first power supply unit 170 is connected to the node between the commercial power supply 110 and the first load circuit breaker 194, An output filter 178 may be connected to the node between the first load breaker 194 and the first load 160.

The second load system sensor 182 of the second power supply 180 is connected to the node between the commercial power supply 110 and the second load circuit breaker 193 and the second output of the second power supply 180 The filter 188 may be connected to a node between the second load breaker 193 and the second load 162.

Hereinafter, a method of operating the power supply unit according to the second embodiment of the present invention will be described with reference to the first power supply unit. It goes without saying that the following description is also applicable to the second power supply unit according to the second embodiment of the present invention.

The power supply controller 189 measures power characteristic information, for example, voltage magnitude and frequency supplied from the commercial power supply 110 to the first load 160 through the first load system sensor 172 . That is, the power supply controller 189 controls the first load circuit breaker 195 and the second load circuit breaker 194 via the first load system sensor 172 in a state in which the first supply circuit breaker 195 is in the off state and the first load circuit breaker 194 is kept in the on state, The power characteristic of the commercial power supply 110 can be measured.

When the power supply controller 189 determines to supply the power charged in the battery 150 to the first load 160, the power supply controller 189 supplies power from the battery 150 to the first DC / AC inverter 174, a first output reactor 176, and a first output filter 178 to the first load 160. In this case, the power supply controller 189 may convert the first load circuit breaker 194 from an ON state to an OFF state. Also, the power supply controller 189 may convert the first supply breaker 195 from the off state to the on state.

The first power supply 170 supplies the regenerative energy charged in the battery 150 to the first load 160. The first power supply 170 supplies the regenerative energy stored in the battery 150 to the first load 160, The power characteristic information supplied from the first load 110 to the first load 160 may be utilized. Accordingly, the first power supply unit 170 may provide the power synchronized with the power supplied from the commercial power supply 110 to the first load 160. [ In other respects, the first supply circuit breaker 195 enters the on state after the regenerative energy is synchronized with the commercial power supply 110, so that it is possible to supply stable power to the load.

As described above, when power is supplied from the first power supply unit 170 to the first load 160, the first load circuit breaker 194 is changed from the ON state to the OFF state. Since the first load system sensor 172 according to the second embodiment of the present invention is connected between the commercial power supply 110 and the first load circuit breaker 194, the first load circuit breaker 194 is in the off state The power characteristics of the commercial power supply 110 can be continuously monitored. Accordingly, when the first power supply unit 170 supplies power to the first load 160, the first power supply unit 170 can continuously supply power by synchronizing with the changing power characteristics of the commercial power supply 110.

Accordingly, even when the power supply from the first power supply unit 170 to the first load 160 is stopped and the power supply from the commercial power supply 110 to the first load 160 is restarted, As shown in FIG.

The regenerative energy management apparatus according to the second embodiment of the present invention has been described above with reference to Fig. Hereinafter, with reference to Fig. 6, a regenerative energy management apparatus according to a third embodiment of the present invention will be described. The regenerative energy management apparatus according to the third embodiment of the present invention may further include a transformer between the power supply unit and the load as compared with the first embodiment of the present invention.

6 is a view for explaining a regenerative energy management apparatus according to a third embodiment of the present invention. 6, a configuration using the same reference numerals as those shown in FIG. 4 among the constituent elements shown in FIG. 6 in the description of the regenerative energy management apparatus according to the third embodiment of the present invention, Since it corresponds to the configuration described in the first embodiment of the invention, a detailed description thereof will be omitted. For example, the power conversion unit 120 and the regenerative energy storage unit 140 shown in FIG. 6 may correspond to the power conversion unit 120 and the regenerative energy storage unit 140 shown in FIG. 4, respectively. Hereinafter, a regenerative energy management apparatus according to a third embodiment of the present invention will be described, focusing on a configuration that is generally similar to the first embodiment of the present invention.

Referring to FIG. 6, the regenerative energy management apparatus 300 according to the third embodiment of the present invention includes a power supply unit, and may further include a transformer in a path for supplying regenerative energy from the power supply unit to the load.

More specifically, the first transformer 173 may be located in a path for supplying regenerative energy from the first power supply unit 170 to the first load 160. In another aspect, the first transformer 173 may be provided between the first supply interrupter 195 and the first output filter 178.

The second transformer 183 may be located in a path for supplying regenerative energy from the second power supply 180 to the second load 162. In another aspect, the second transformer 183 may be provided between the second supply interrupter 193 and the second output filter 188.

Hereinafter, the function of the transformer according to the third embodiment of the present invention will be described.

The transformer may block the circulating current circulating through the power supply, the regenerative energy storage, and the distribution line. For example, the first transformer 173 may cut off the circulating current circulating through the first power supply unit 170, the distribution line 190, and the regenerative energy storage unit 140.

The transformer may also provide electrical isolation between the node between the load breaker and the load and the power supply output node. That is, when an accident such as a system fault occurs, the transformer provides electrical insulation, thereby minimizing the influence on the device. For example, the first transformer 173 provides electrical isolation between the node between the first load breaker 194 and the first load 160 and the output node of the first power supply 170, The first load 160 and the first power supply 170 can be protected.

The transformer may electrically isolate the system constituted by the first power supply unit 170 and the first load 160 and the system constituted by the second power supply unit 180 and the second load 162. [

6, the regenerative energy management apparatus according to the third embodiment of the present invention has been described. In the description of the third embodiment of the present invention, a transformer is added to the first embodiment of the present invention. However, it is needless to say that a transformer may be added to the second embodiment of the present invention.

7, a regenerative energy management apparatus according to a fourth embodiment of the present invention will be described. The regenerative energy management apparatus according to the fourth embodiment of the present invention may further include a regenerative energy source changeover switch in contrast to the third embodiment of the present invention.

7 is a view for explaining a regenerative energy management apparatus according to a fourth embodiment of the present invention. 7, a configuration using the same reference numerals as the components shown in FIG. 6 among the components shown in FIG. 7 will be described with reference to FIG. 7. In the regenerative energy management apparatus according to the fourth embodiment of the present invention, Since the third embodiment of the invention corresponds to the configuration described above, a detailed description thereof will be omitted. For example, the power conversion unit 120, the regenerative energy storage unit 140, and the power supply units 170 and 180 shown in FIG. 7 may include the power conversion unit 120, (140), and power supply (170, 180). 7, the regenerative energy storage unit 140 of the regenerative energy management apparatus according to the fourth embodiment of the present invention is also connected to the input filter 144, the input reactors 146 ), An AC / DC converter 148, a battery 150, and a regenerative circuit breaker 192. Hereinafter, a regenerative energy management apparatus according to a fourth embodiment of the present invention will be described, focusing on the configuration that is roughly the same as the third embodiment of the present invention.

Referring to FIG. 7, the regenerative energy management apparatus 400 according to the fourth embodiment of the present invention may include a regenerative energy source changeover switch 134.

The regenerative energy source changeover switch 134 may selectively provide a regenerative energy source provided to the regenerative energy storage unit 140. One end of the regenerative energy source change-over switch 134 is connected to a node between the commercial power source 110 and the AC / DC converter 122, and the other end of the regenerative energy source change- And may be connected to a node between the AC / DC converter 122 and the DC / AC inverter 124. The regenerative energy source changeover switch 134 may supply regenerative energy between the commercial power source 110 and the AC / DC converter 122 to the regenerative energy storage unit 140, The AC / DC converter 122 and the DC / AC inverter 124 may be supplied to the regenerative energy storage unit 140.

In addition, the regenerative energy management apparatus 400 according to the fourth embodiment of the present invention may further include a sensor changeover switch 132. The sensor change-over switch 132 may be configured such that the regenerative energy source change-over switch 134 supplies the regenerative energy between the commercial power source 110 and the AC / DC converter 122 to the regenerative energy storage unit 140 It is possible to select whether or not to supply the regenerative energy between the AC / DC converter 122 and the DC / AC inverter 124 to the regenerative energy storage unit 140. One end of the sensor changeover switch 132 is connected to a node between the commercial power supply 110 and the AC / DC converter 122. The other end of the sensor changeover switch 132 is connected to the AC / Converter 122 and the DC / AC inverter 124. The DC /

7, a regenerative energy management apparatus according to the fourth embodiment of the present invention has been described. In the description of the fourth embodiment of the present invention, the case where the regenerative energy source changeover switch is added to the third embodiment of the present invention has been described. However, in the first or second embodiment of the present invention, It goes without saying that a switch can be added.

As described above, the first to fourth embodiments of the present invention have been described. However, the first to fourth embodiments of the present invention may be implemented separately, and at least two of the first to fourth embodiments of the present invention It is needless to say that the embodiments may be combined.

On the other hand, the regenerative energy management apparatus according to the first to fourth embodiments of the present invention described with reference to Figs. 4 to 7 can be applied to a case where the power conversion unit includes the AC / DC converter and the DC / AC inverter . Alternatively, the present invention can be applied to a case where the power conversion section includes an AC / DC rectifier and a DC / AC inverter.

Hereinafter, the case where the power converting unit includes the AC / DC rectifier and the DC / AC inverter will be described with reference to FIGS. 8 to 11. FIG. 8 to 11, the power conversion unit 120 includes an AC / DC rectifier 125 connected to a commercial power source, a regenerative unit 126, And a DC / AC inverter 124 connected to the AC / DC rectifier 125. One end of the regenerative unit 126 is connected to the AC / DC rectifier 125 and the DC / AC inverter 124. The other end of the regenerative unit 126 is connected to the commercial power source 110, And may be connected to the node between the AC / DC rectifier 125.

The regenerative energy management apparatus according to the fifth to eighth embodiments of the present invention may correspond to the regenerative energy management apparatus according to the first to fourth embodiments of the present invention.

8 to 11 are views for explaining a regenerative energy management apparatus according to fifth to eighth embodiments of the present invention.

8, the regenerative energy management device 500 according to the fifth embodiment of the present invention is different from the regenerative energy management device 100 according to the first embodiment of the present invention in that a regenerative energy management device is connected The configuration of the power conversion unit is different from that of the power conversion unit, and the functions of the other configurations and the configurations correspond to each other, and a detailed description thereof will be omitted.

9, the regenerative energy management apparatus 600 according to the sixth embodiment of the present invention is different from the regenerative energy management apparatus 200 according to the second embodiment of the present invention in that a regenerative energy management apparatus is connected The configuration of the power conversion unit is different from that of the power conversion unit, and the functions of the other configurations and the configurations correspond to each other, and a detailed description thereof will be omitted.

10, the regenerative energy management apparatus 700 according to the seventh embodiment of the present invention is different from the regenerative energy management apparatus 300 according to the third embodiment of the present invention in that a regenerative energy management apparatus is connected The configuration of the power conversion unit is different from that of the power conversion unit, and the functions of the other configurations and the configurations correspond to each other, and a detailed description thereof will be omitted.

11, the regenerative energy management device 800 according to the eighth embodiment of the present invention is different from the regenerative energy management device 400 according to the fourth embodiment of the present invention in that the regenerative energy management device 800 is connected The configuration of the power conversion unit is different from that of the power conversion unit, and the functions of the other configurations and the configurations correspond to each other, and a detailed description thereof will be omitted.

11 illustrating the eighth embodiment of the present invention has been described on the assumption that it is applied to the seventh embodiment, but it goes without saying that the regenerative energy source changeover switch may be added to the fifth or sixth embodiment of the present invention .

In addition, the fifth to eighth embodiments of the present invention may be implemented individually, and at least two of the fifth to eighth embodiments of the present invention may be combined.

The above-described regenerative energy management apparatus according to the first to eighth embodiments of the present invention can be applied to any system in which regenerative energy is generated. For example, the regenerative energy management apparatus according to the first to eighth embodiments of the present invention can be applied to an elevator, a port container crane, a crane for a construction equipment, a plant electric motor brake system, a train, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

110: commercial power supply 120: power conversion unit
140: regenerative energy storage unit 170, 180: power supply unit

Claims (10)

A regenerative energy sensor connected between the power converter for converting and supplying commercial power to a motor and detecting whether regenerated energy generated from the motor is generated; And
And a battery for receiving and storing the regenerative energy when the regenerative energy sensor is in an on state according to the detection result of the regenerative energy sensor,
The power conversion apparatus includes an AC / DC converter for converting the commercial power to DC, and a DC / AC inverter provided between the AC / DC converter and the motor,
The regenerative energy detection sensor is connected between the commercial power source and the AC / DC converter,
The regenerative energy is provided to the battery through a distribution line between the commercial power source and the AC / DC converter
Further comprising a power supply unit that supplies a regenerative energy stored in the battery to a load connected to the commercial power supply and includes a load system sensor,
Wherein the load system sensor is connected between the commercial power source and a load breaker for opening and closing the commercial power source to the load,
Wherein the power supply unit senses a power characteristic from the commercial power supply to the load through the load system sensor when the regenerative energy is supplied to the load so that power synchronized with the power characteristic from the commercial power supply to the load And between the load breaker and the load,
Wherein the load system sensor senses a power characteristic of the commercial power supply even when the regenerative energy is supplied to the load while the load circuit breaker is in an off state.
delete delete The method according to claim 1,
A power supply unit for supplying regenerative energy stored in the battery to a load connected to the commercial power supply; And
And a transformer in a path for supplying the regenerative energy from the power supply unit to the load.
The method according to claim 1,
Further comprising a regenerative energy source changeover switch,
Wherein the regenerative energy source changeover switch selectively provides regenerative energy among a node between the commercial power source and the AC / DC converter, and a node between the AC / DC converter and the DC / AC inverter.
A regenerative energy sensor connected between the commercial power source and a power conversion device for converting and supplying commercial power to a motor and detecting whether or not regenerative energy generated from the motor is generated; And
And a battery for receiving and storing the regenerative energy when the regenerative energy sensor is in an on state according to the detection result of the regenerative energy sensor,
The power converter includes an AC / DC rectifier for converting the commercial power to DC, a DC / AC inverter provided between the AC / DC rectifier and the motor, and an AC / DC rectifier for converting the AC / DC rectifier and the DC / And a regenerative unit connected between the commercial power source and the AC / DC rectifier,
The regenerative energy detection sensor is connected between the commercial power source and the AC / DC rectifier,
The regenerative energy is provided to the battery through a distribution line between the commercial power source and the AC / DC rectifier
Further comprising a power supply unit that supplies a regenerative energy stored in the battery to a load connected to the commercial power supply and includes a load system sensor,
Wherein the load system sensor is connected between the commercial power source and a load breaker for opening and closing the commercial power source to the load,
Wherein the power supply unit senses a power characteristic from the commercial power supply to the load through the load system sensor when the regenerative energy is supplied to the load so that power synchronized with the power characteristic from the commercial power supply to the load And between the load breaker and the load,
Wherein the load system sensor senses a power characteristic of the commercial power supply even when the regenerative energy is supplied to the load while the load circuit breaker is in an off state.
delete delete The method according to claim 6,
A power supply unit for supplying regenerative energy stored in the battery to a load connected to the commercial power supply; And
And a transformer in a path for supplying the regenerative energy from the power supply unit to the load.
The method according to claim 6,
Further comprising a regenerative energy source changeover switch,
Wherein the regenerative energy source changeover switch selectively provides regenerative energy among a node between the commercial power source and the AC / DC rectifier, and a node between the AC / DC rectifier and the DC / AC inverter.
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