KR20170074631A - Energy distribuition system in smart grid envirmnent - Google Patents
Energy distribuition system in smart grid envirmnent Download PDFInfo
- Publication number
- KR20170074631A KR20170074631A KR1020150184139A KR20150184139A KR20170074631A KR 20170074631 A KR20170074631 A KR 20170074631A KR 1020150184139 A KR1020150184139 A KR 1020150184139A KR 20150184139 A KR20150184139 A KR 20150184139A KR 20170074631 A KR20170074631 A KR 20170074631A
- Authority
- KR
- South Korea
- Prior art keywords
- power
- energy
- power conversion
- control
- energy storage
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 95
- 238000004146 energy storage Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000007726 management method Methods 0.000 description 23
- 238000010248 power generation Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 230000005284 excitation Effects 0.000 description 7
- 230000002457 bidirectional effect Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- -1 nickel metal hydride Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
Images
Classifications
-
- H02J3/382—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
-
- Y04S40/166—
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to an energy distribution system in a smart grid environment, and more particularly, to a first power conversion apparatus for converting DC power supplied through a renewable energy device into DC power of a predetermined magnitude, A second power conversion device for converting the stored power into DC link power required by the third power conversion device and converting the power supplied to the energy storage device to a power level required by the energy storage device, A third power conversion device for converting the DC link power output from the renewable energy device or the energy storage device into AC power of the system or converting the AC power of the system into DC power, , A third power conversion device, and a load, and distributes the power.
Description
The present invention relates to an energy distribution system in a smart grid environment, and more particularly, to a smart grid environment capable of instantly shutting off power supplied to a system when an accident such as a short circuit occurs in a system utilizing a unidirectional function of the semiconductor element To an energy distribution system.
Smart grid (Smart Grid) can maximize energy efficiency by integrating information and communication technology into the grid and knowing the electricity usage, supply amount and power line status. At the heart of the smart grid is the integration of information and communication technologies, such as Zigbee and powerline communications, into the grid, enabling consumers and utilities to exchange information (eg, real-time electricity charges) in real time.
On the other hand, the electric power used in household appliances is DC, which receives AC power and converts it to DC. However, loss occurs during conversion of AC power to DC, and loss occurs during power transmission by the skin effect. In order to reduce such power loss, a DC grid type that distributes by DC has been proposed and developed.
In a DC Grid Smart Grid, systemic accidents are very dangerous and require immediate control of the hazards. That is, in case of AC, the arc is automatically extinguished even if it is cut off by a mechanical switch, but in the case of DC, the arc is not automatically extinguished.
Therefore, in the case of an accident such as a short circuit in the grid in the DC grid type smart grid, it is required to develop a technology that can immediately control the risk factor.
An object of the present invention is to provide an energy distribution system in a smart grid environment in which a risk element can be immediately controlled when an accident such as a short circuit occurs in a grid in a DC grid type smart grid.
Another object of the present invention is to provide a method and apparatus for protecting a large capacity DC in a DC Grid type smart grid environment and utilizing a function of STS (State Transfer Switch) for managing various kinds of renewal and power sources and a unidirectional function of a semiconductor device And to provide an energy distribution system in a smart grid environment capable of determining the direction of power.
According to an aspect of the present invention, there is provided a first power conversion device for converting direct current power supplied through a renewable energy device into direct current power of a predetermined magnitude, an energy storage device connected to the energy storage device, A second power conversion device for converting the power supplied to the energy storage device into a power level required by the energy storage device, and a second power conversion device connected to the system, A third power conversion device that converts DC link power output from the device into AC power of the system or AC power of the system into DC power; a third power conversion device that converts the AC power of the system into AC power, And a distribution control device connected to at least one of the loads to distribute the power, wherein the power distribution system / RTI >
The power distribution control device collects operating state information transmitted from at least one of the renewable energy device, the energy storage device, the electric power conversion device, and the grid, and controls the renewable energy device, the energy storage device, When an accident is detected in at least one of the power conversion device, the system, and the load, the power supply to the device can be cut off.
Such a power distribution control apparatus is turned on and off under the control of the control unit, and is turned on and off under the control of the first switch unit and the control unit for controlling the operation power of the first power conversion apparatus, A third switch section that is turned on and off under the control of the control section and thereby controls the operation power of the third power conversion apparatus; A fourth switch unit for interrupting the electric power supplied to the load, and a fourth switch unit for interrupting the electric power supplied to the load, thereby collecting operational status information transmitted from at least one of the renewable energy device, the energy storage device, the power conversion device, and the system, Wherein when an occurrence of an accident is detected in at least one of the renewable energy device, the energy storage device, the power conversion device, the system, and the load, The switch control unit is associated with the value may be a control unit for blocking the supply of electric power to the device.
The first to fourth switch units may have a structure in which two IGBTs are connected.
In addition, the first to fourth switch portions may be provided so that two IGBTs are oriented in different directions, so that electric power flows in one direction or both directions.
When the control signal for the occurrence of an accident is received from the energy management apparatus, the control unit controls the switch unit connected to the corresponding one of the first to fourth switch units to cut off power supply to the corresponding device.
The energy distribution system in the Smart Grid environment further includes an energy management device coupled to the distribution control device, wherein the energy management device monitors the state of the renewable energy device, the energy storage device, the system and the load, A control signal for shutting off power supply to the system can be transmitted to the distribution control apparatus.
According to another aspect of the present invention, there is provided a power conversion system including a first power conversion device connected to a renewable energy device, a second power conversion device connected to the energy storage device, a third power conversion device connected to the system, The control device includes a first switch section that is turned on and off under the control of the control section and thereby controls the operation power of the first power conversion apparatus and a second switch section that is turned on and off under the control of the control section, A third switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the third power conversion apparatus; A fourth switch unit for interrupting the power supplied to the load, and a second switch unit for monitoring at least one of the renewable energy device, the energy storage device, the power conversion device, If the occurrence is detected, the power distribution control device for a control unit for blocking the supply of electric power to the device to control the first to fourth switching unit switches associated with the accident, the detection device of the parts is provided.
The first to fourth switch parts may be provided so that two IGBTs are oriented in different directions so that electric power flows in one direction or in both directions.
According to the present invention, when an accident such as a short circuit occurs in a grid in a DC grid type smart grid, the risk element can be immediately blocked.
In addition, since the direction of the power can be determined by utilizing the function of the STS (State Transfer Switch) and the unidirectional current flow function of the semiconductor device, the convenience of power management and the stability of the system can be improved. That is, since the direction of power can be determined using the IGBT, power management can be conveniently performed without additional control.
1 is a view for explaining energy distribution in a smart grid environment according to an embodiment of the present invention.
2 is a diagram illustrating an energy distribution system in a smart grid environment according to an embodiment of the present invention.
3 is a view for explaining a power direction when the switch unit according to the embodiment of the present invention is formed of an IGBT.
4 is an exemplary diagram for explaining energy distribution in a smart grid environment according to an embodiment of the present invention.
Hereinafter, a 'energy distribution system in a smart grid environment' according to the present invention will be described in detail with reference to the accompanying drawings. The embodiments are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and thus the present invention is not limited thereto. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.
In the meantime, each constituent unit described below is only an example for implementing the present invention. Thus, in other implementations of the present invention, other components may be used without departing from the spirit and scope of the present invention. Also, the expression " comprising " is intended to merely denote that such elements are present as an expression of " open ", and should not be understood to exclude additional elements.
1 is a view for explaining energy distribution in a smart grid environment according to an embodiment of the present invention.
Referring to FIG. 1, in order to perform energy distribution in a smart grid environment, a bidirectional DC-AC converter for linking with a system, a DC-DC converter for controlling power generated from renewable energy, When the amount of electric power stored in the bidirectional DC-DC converter and the energy storage device is equal to or more than a preset reference value, power is applied to the DC load together with the renewable energy. When the amount of energy stored in the energy storage device is below the preset reference value, And an energy management device for displaying the control result signals received from the distribution control device in real time.
Hereinafter, a system having such a configuration will be described in detail with reference to FIG.
FIG. 2 is a diagram illustrating an energy distribution system in a smart grid environment according to an embodiment of the present invention. FIG. 3 is a view for explaining a power direction when the switch unit according to the embodiment of the present invention is formed of an IGBT.
Referring to FIG. 2, in the smart grid environment, the energy distribution system includes a first
The
The
When the first
The first
The
The
The
The second
That is, the
The
This
The
The
The third
The third
This
In addition to the example shown in FIG. 2, the first to third
The
The power-consuming
The power
The power distributed from the
The power
The
The
The power
The
The first to
The case where the
(a) shows a structure in which current flows in both directions when two IGBTs are on, (b) shows a structure that only current flows to the left when only the left IGBT is on, and (c) When the IGBT is ON, the current is transferred to the right side only.
The
The
That is, the
The
That is, the
The
That is, the
The
The
The
Hereinafter, the operation of the
The
When an accident occurs in the
The
First, the renewable energy produced by the
In addition, the
The
The
Similarly, when there is no energy supply from the
In accordance with the control of the
The
The
The function of the
The function of determining the failure of the system is a function of determining that the system is malfunctioning when the
The function of grasping the state of the system performs a function of generating a relay signal for switching the operation mode when an accident occurs as a result of the determination by the
The function for grid linkage is to control the power generation to the system when the power generation amount is large through the difference between the power in the renewable energy and the amount of power used in the DC load through the bidirectional power control, In many cases, the
The function for independent operation is a function that operates when an accident of the
When an accident occurs in the
The
The
For example, the
The
4 is an exemplary diagram for explaining energy distribution in a smart grid environment according to an embodiment of the present invention.
Referring to FIG. 4, there is a case in which one input from the system, one input from the sunlight, and one input from the wind power are composed of three inputs and one output.
The
In other words, when an energy storage device (ESS) connected to the sunlight side stores electric power as sunlight and there is a problem in the system, when the electric power of the energy storage device is inputted, the unidirectional function is given to the IGBT connected to the sunlight side, Thereby making it impossible to acquire the electric power from the battery.
In addition, when the IGBT is selectively turned on, the electric energy generated from the sunlight can be charged only by the ESS, and the remaining electric power can be sent to the load or the system. In the case of the wind power, It becomes a configuration that can be sent.
And, if the power is cut off due to an accident in the grid, it is possible to automatically supply power from the ESS.
As described above, when two unidirectional IGBTs are connected to provide a bi-directional switch unit, when an accident occurs in a new or renewable energy device, an energy storage device, a power conversion device, a system, or a load, To determine the direction of the power flow, thereby preventing power from being supplied to the place where the accident occurred.
Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.
102: renewable energy device 104: first power converter
106: Energy storage device 108: Second power conversion device
110: system 112: third power converter
200: distribution control device 202: first switch part
204: second switch unit 206: third switch unit
208: fourth switch unit 210:
212:
Claims (9)
Converting the power stored in the energy storage device into DC link power required by the third power conversion device and converting the power input to the energy storage device into a power level required by the energy storage device, Power conversion device;
A third power conversion device connected to the system for converting DC link power output from the renewable energy device or the energy storage device into AC power of the system or converting AC power of the system into DC power; And
A distribution control device connected to at least one of the first power conversion device, the second power conversion device, the third power conversion device, and the load to distribute electric power;
Energy distribution system in a smart grid environment.
The distribution control device includes:
Wherein the control unit collects operating state information transmitted from at least one of the renewable energy device, the energy storage device, the electric power conversion device, and the grid, and controls the renewable energy device, the energy storage device, And when the occurrence of an accident is detected in at least one of the loads, the power supply to the device is cut off.
The distribution control device includes:
A first switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the first power conversion apparatus;
A second switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the second power conversion apparatus;
A third switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the third power conversion apparatus;
A fourth switch unit for on / off operation under the control of the control unit and for interrupting the electric power supplied to the load in accordance therewith; And
Wherein the control unit collects operating state information transmitted from at least one of the renewable energy device, the energy storage device, the electric power conversion device, and the grid, and controls the renewable energy device, the energy storage device, And a controller for controlling the switch unit connected to the corresponding one of the first to fourth switch units to shut off the power supply to the corresponding device when the occurrence of an accident is detected in at least one of the first to fourth switches. Energy distribution system.
Wherein the first to fourth switches are connected to two IGBTs (Insulated Gate Bipolar Transistors).
Wherein the first to fourth switch parts are provided so that two IGBTs are oriented in different directions so that power flows in a unidirectional or bi-directional manner.
Wherein, when a control signal for an occurrence of an accident is received from the energy management apparatus, the control unit controls the switch unit connected to the corresponding one of the first to fourth switch units to cut off power supply to the corresponding device. Energy distribution system in the environment.
Further comprising an energy management device connected to said distribution control device,
The energy management device monitors the state of the new and renewable energy device, the energy storage device, the system and the load, and transmits a control signal to the distribution control device to shut off the power supply to the system according to the monitoring result Energy distribution system in a smart grid environment.
A first switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the first power conversion apparatus;
A second switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the second power conversion apparatus;
A third switch unit that is turned on and off under the control of the control unit and thereby controls the operation power of the third power conversion apparatus;
A fourth switch unit for on / off operation under the control of the control unit and for interrupting the electric power supplied to the load in accordance therewith; And
Wherein when an occurrence of an accident is detected during monitoring at least one of the renewable energy device, the energy storage device, the power conversion device, the system, and the load, a switch part connected to the device of the first to fourth switch parts, A control unit for controlling power supply to the device;
And the distribution control device.
Wherein the first to fourth switch parts are provided so that two IGBTs are oriented in different directions so that electric power flows in a unidirectional or bi-directional manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150184139A KR20170074631A (en) | 2015-12-22 | 2015-12-22 | Energy distribuition system in smart grid envirmnent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150184139A KR20170074631A (en) | 2015-12-22 | 2015-12-22 | Energy distribuition system in smart grid envirmnent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20170074631A true KR20170074631A (en) | 2017-06-30 |
Family
ID=59279872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150184139A KR20170074631A (en) | 2015-12-22 | 2015-12-22 | Energy distribuition system in smart grid envirmnent |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20170074631A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190045951A (en) * | 2017-10-24 | 2019-05-07 | 주식회사 윈텍오토메이션 | DC autonomous distribution control system for efficient power transmission and distribution between loads in a micro grid and its operation method |
| KR102046821B1 (en) * | 2019-05-20 | 2019-11-21 | 폴그린테크(주) | Power distribution and power transmission control apparatus based on generation voltage of solar-cell power generating system |
| KR102046820B1 (en) * | 2019-05-20 | 2019-11-21 | 폴그린테크(주) | Power distribution apparatus based on generation voltage of solar-cell power generating system |
| CN117277413A (en) * | 2023-09-27 | 2023-12-22 | 聚链电力(山东)有限公司 | Energy management system based on energy change of energy storage device in system |
-
2015
- 2015-12-22 KR KR1020150184139A patent/KR20170074631A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190045951A (en) * | 2017-10-24 | 2019-05-07 | 주식회사 윈텍오토메이션 | DC autonomous distribution control system for efficient power transmission and distribution between loads in a micro grid and its operation method |
| KR102046821B1 (en) * | 2019-05-20 | 2019-11-21 | 폴그린테크(주) | Power distribution and power transmission control apparatus based on generation voltage of solar-cell power generating system |
| KR102046820B1 (en) * | 2019-05-20 | 2019-11-21 | 폴그린테크(주) | Power distribution apparatus based on generation voltage of solar-cell power generating system |
| CN117277413A (en) * | 2023-09-27 | 2023-12-22 | 聚链电力(山东)有限公司 | Energy management system based on energy change of energy storage device in system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101146670B1 (en) | Energy management system and method for controlling thereof | |
| KR101156535B1 (en) | Apparatus for energy storage, operation method thereof and energy storage system | |
| KR101156533B1 (en) | Energy storage system and method for controlling thereof | |
| KR101084216B1 (en) | Energy storage system and method for controlling thereof | |
| KR101097259B1 (en) | An apparatus and a controlling method for storing power | |
| JP5774765B2 (en) | Charge / discharge device and power supply switching system | |
| US9899871B2 (en) | Islanded operating system | |
| US10298006B2 (en) | Energy storage system and method of driving the same | |
| US20130169064A1 (en) | Energy storage system and controlling method of the same | |
| KR20110068639A (en) | Energy storage system and method for controlling thereof | |
| KR20120067732A (en) | System for energy storage and control method thereof | |
| JP2013085459A (en) | Power storage system and control method therefor | |
| JP2011083087A (en) | Power supply system | |
| JP7251908B2 (en) | Charging/discharging device and power supply switching system | |
| KR20170074631A (en) | Energy distribuition system in smart grid envirmnent | |
| JP6503095B2 (en) | Charge / discharge device | |
| KR101920695B1 (en) | ESS for charging and discharging at the same time, and using ON-Grid and OFF-Grid | |
| CN209844563U (en) | Electric energy quality dynamic regulator for micro-grid | |
| JP6272971B2 (en) | Power switching device and house | |
| KR101729832B1 (en) | Method of controlling Energy Storage System | |
| KR101698267B1 (en) | Method of Controlling Energy Storage System | |
| JP2023147895A (en) | Power system and control method therefor | |
| KR20150111639A (en) | Automatic switching coltrol apparatus and control method in grid-tied system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |