CN213879292U - Automatic charge-discharge switching device and system - Google Patents
Automatic charge-discharge switching device and system Download PDFInfo
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- CN213879292U CN213879292U CN202022350679.0U CN202022350679U CN213879292U CN 213879292 U CN213879292 U CN 213879292U CN 202022350679 U CN202022350679 U CN 202022350679U CN 213879292 U CN213879292 U CN 213879292U
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Abstract
The utility model discloses a charging and discharging automatic switching device and a system, wherein the device comprises a first circuit with one end as a charging input port, a second circuit with one end as a discharging output port, and a third circuit with one end as a connecting port for connecting with an energy storage converter; the charging switch of the first line and the discharging switch of the second line are locked through interlocking; the charging is realized when the load curve is in the valley period, the discharging is realized when the load curve is in the valley period, the spatial transfer of the charging and discharging energy of the power grid of the energy storage system is realized, and the problem of heavy overload of the line is solved; the peak-time electric quantity of the feeder terminal is transferred to the low-valley electric quantity of the energy storage terminal, so that the maximum efficiency of the energy storage system is exerted.
Description
Technical Field
The utility model relates to an electrical control equipment, especially charge-discharge automatic switching control equipment and system.
Background
In the application of a power grid, the scheme of power grid side energy storage and user side energy storage is provided, and the power grid side energy storage has the advantages of improving the reliability of the power grid and reducing the extension capacity of the power grid, so that the power grid side energy storage has high development potential. However, for the energy storage at the power grid side, a scheme of designing a single access point at a feeder terminal is mostly adopted; however, when a single access point is charged and discharged on the same line, the load curves are constrained with each other, and in addition, because the maximum peak clipping electric quantity of the energy storage device is limited by the charging quantity of the feeder line in the valley period, the energy storage peak shifting and valley filling capacity is low, and energy storage resource waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at solves one of the technical problem that exists among the prior art at least, provides charge-discharge automatic switching control equipment and system.
The utility model provides a technical scheme that its problem adopted is:
the utility model discloses an aspect, charge-discharge automatic switching control equipment, include:
one end of the first line is a charging input port;
one end of the second line is a discharge output port;
one end of the third line is connected with the other end of the first line and the other end of the second line, and the other end of the third line is a connecting port for connecting the energy storage converter;
an interlock including a charge switch disposed on the first line and a discharge switch disposed on the second line; the charging switch and the discharging switch form a lock; one of the charging switch and the discharging switch is closed, and the other is opened;
and the control module is used for controlling the actions of the charging switch and the discharging switch and is in communication connection with the energy storage converter and the energy storage monitoring device through the communication module.
According to the utility model discloses an aspect, the interlock includes main loop wiring board, first link circuit and second link circuit, the switch that charges is located in the first link circuit, the switch that discharges is located in the second link circuit, first link circuit second link circuit all with the main loop wiring board is connected.
According to a first aspect of the present invention, the first linkage circuit comprises a first time relay, a first snap button, a first automatic transfer switch, a first intermediate relay, a second intermediate relay and a third intermediate relay; one end of the first time relay, one end of the first dynamic switch button, one end of the third intermediate relay and one end of the charging switch are connected with a live wire of the first line, the other end of the first time relay is connected with one end of the second intermediate relay, the other end of the first dynamic switch button and the other end of the first intermediate relay are both connected with one end of the first automatic change-over switch, the other end of the first automatic change-over switch is connected with one end of the second intermediate relay and one end of the third intermediate relay, and the other end of the second intermediate relay and the other end of the third intermediate relay are both connected with a zero line of the first line; the other end of the charging switch is connected with the main circuit wiring board.
According to the utility model discloses an aspect, first link circuit is still including being used for instructing the first combined floodgate pilot lamp of charging switch disconnection on-state, the one end of first combined floodgate pilot lamp with the live wire of first circuit is connected, the other end of first combined floodgate pilot lamp with the major loop wiring board is connected.
According to a first aspect of the present invention, the second linkage circuit comprises a second time relay, a second moving-on button, a second automatic transfer switch, a fourth intermediate relay, a fifth intermediate relay and a sixth intermediate relay; one end of the second time relay, one end of the second dynamic switch button, one end of the sixth intermediate relay and one end of the discharge switch are connected with the live wire of the second line, the other end of the second time relay is connected with one end of the fifth intermediate relay, the other end of the second dynamic switch button and the other end of the fourth intermediate relay are both connected with one end of the second automatic change-over switch, the other end of the second automatic change-over switch is connected with one end of the fifth intermediate relay and one end of the sixth intermediate relay, and the other end of the fifth intermediate relay and the other end of the sixth intermediate relay are both connected with the zero line of the second line; the other end of the discharge switch is connected with the main circuit wiring board.
According to the utility model discloses an aspect, second linkage circuit is still including being used for instructing the second combined floodgate pilot lamp of charging switch disconnection on-state, the one end of second combined floodgate pilot lamp with the live wire of second circuit is connected, the other end of second combined floodgate pilot lamp with the major loop wiring board is connected.
According to the utility model discloses a first aspect, first link circuit with be provided with first fuse between the live wire of first circuit.
According to the first aspect of the present invention, a second fuse is provided between the second linkage circuit and the live wire of the second circuit.
According to the utility model discloses an aspect, the live wire of first circuit with the live wire of second circuit is three-phase line.
The utility model discloses a second aspect, charge-discharge automatic switching system, include: energy storage converter, energy storage monitoring device and if the utility model discloses the first aspect charge-discharge automatic switching control equipment, charge-discharge automatic switching control equipment with energy storage converter energy storage monitoring device communication connection.
The scheme at least has the following beneficial effects: the charging grid-connected line and the discharging grid-connected line are separated through the charging and discharging automatic switching device, so that the charging and discharging energy of the energy storage system power grid can be transferred in space, and the problem of heavy overload of the line is solved; by utilizing the characteristic of strong charging capability of the energy storage end in the valley period, the peak-time electric quantity of the feeder end connected with the discharge output port is transferred to the valley electric quantity of the energy storage end, so that the maximum efficiency of the energy storage system is exerted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples.
Fig. 1 is a schematic diagram of an automatic charge-discharge switching device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an automatic charge-discharge switching system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the interlock.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, in one embodiment of the present invention, an automatic charge-discharge switching device 10 is provided. The charge/discharge automatic switching device 10 includes:
a first line 110, one end of the first line 110 being a charging input port 210;
a second line 120, one end of the second line 120 being a discharge output port 220;
one end of the third line 130 is connected to both the other end of the first line 110 and the other end of the second line 120, and the other end of the third line 130 is a connection port 230 for connecting with the energy storage converter 20;
an interlock 300, the interlock 300 including a charging switch 310 provided on the first line 110 and a discharging switch 320 provided on the second line 120; the charging switch 310 and the discharging switch 320 form a latch; one of the charge switch 310 and the discharge switch 320 is closed, and the other is open;
the control module 400 is used for controlling the actions of the charging switch 310 and the discharging switch 320, and the control module 400 is in communication connection with the energy storage converter 20 and the energy storage monitoring device 30 through the communication module 500; the communication module 500 communicates with the energy storage converter 20 and the energy storage monitoring device 30 through RS485 or ethernet.
In the embodiment, the charging grid-connected line and the discharging grid-connected line are separated by the automatic charging and discharging switching device 10, so that the charging and discharging energy of the energy storage system power grid can be transferred in space, and the problem of heavy overload of the line is solved; by utilizing the characteristic of strong charging capability of the energy storage terminal in the valley period, the peak-time electric quantity of the feeder terminal connected with the discharge output port 220 is transferred to the valley electric quantity of the energy storage terminal, so that the maximum efficiency of the energy storage system is exerted. The problem of energy storage resource waste caused by low energy storage peak shifting and valley filling capacity due to the fact that a single access point carries out charging and discharging on the same line is solved.
For example, the charging input port 210 of the automatic charging and discharging switching device 10 is connected to a 10kV bus of a substation, and the discharging output port 220 is connected to a feeder. When monitoring the energy storage system load curve through energy storage monitoring device 30 and being in the valley period, energy storage converter 20 and energy storage monitoring device 30 send the instruction of charging, and the controller receives the instruction of charging through communication module 500, and the control switch 310 that charges is closed, utilizes the strong charging ability of transformer substation's valley period, improves charge efficiency, and the effect of 300 at this moment is transferred electric switch 320 and must be broken off, does not discharge to the feeder terminal. When the energy storage monitoring device 30 monitors that the load curve of the energy storage system is in the peak top period, the energy storage converter 20 and the energy storage monitoring device 30 send a discharging instruction, the controller receives the discharging instruction through the communication module 500, the discharging switch 320 is controlled to be closed for discharging, the charging switch 310 is inevitably disconnected under the action of the interlock 300, and the transformer substation does not charge the energy storage system. Through measurement, the load rate of the feeder line is reduced by 32%, the maximum load of the line is downloaded to 5.5MW, the maximum peak clipping power of the energy storage system is 20MWh, and the peak clipping and valley filling capacity is improved.
It should be noted that, the charging input port 210 and the discharging output port 220 can be expanded into a plurality of ports, so as to solve the problem of heavy overload of a plurality of feeders.
Referring to fig. 3, further, the interlock 300 includes a main circuit terminal block 140, a first interlock circuit in which a charge switch 310 is located, and a second interlock circuit in which a discharge switch 320 is located, both the first interlock circuit and the second interlock circuit being connected to the main circuit terminal block 140. The main circuit wiring board 140 connects the wiring between the first and second link circuits. The latch between the charge switch 310 and the discharge switch 320 is formed by the action between the first linkage circuit and the second linkage circuit.
Further, the first interlock circuit includes a first time relay KT1, a first moving-on button S1, a first automatic transfer switch ST1, a first intermediate relay K1, a second intermediate relay K2, and a third intermediate relay K3; one end of a first time relay KT1, one end of a first dynamic switch button S1, one end of a third intermediate relay K3 and one end of a charging switch 310 are connected with a live wire of a first line 110, the other end of the first time relay KT1 is connected with one end of a second intermediate relay K2, the other end of the first dynamic switch button S1 and the other end of the first intermediate relay K1 are both connected with one end of a first automatic transfer switch ST1, the other end of the first automatic transfer switch ST1 is connected with one end of a second intermediate relay K2 and one end of the third intermediate relay K3, and the other end of the second intermediate relay K2 and the other end of the third intermediate relay K3 are both connected with a zero line of the first line 110; the other end of the charge switch 310 is connected to the a1 port of the main circuit terminal plate 140.
Further, the second link circuit includes a second time relay KT2, a second moving-on button S2, a second automatic transfer switch ST2, a fourth intermediate relay K4, a fifth intermediate relay K5, and a sixth intermediate relay K6; one end of a second time relay KT2, one end of a second on-off button S2, one end of a sixth intermediate relay K6 and one end of a discharge switch 320 are connected with a live wire of the second line 120, the other end of the second time relay KT2 is connected with one end of a fifth intermediate relay K5, the other end of a second on-off button S2 and the other end of a fourth intermediate relay K4 are connected with one end of a second automatic transfer switch ST2, the other end of the second automatic transfer switch ST2 is connected with one end of a fifth intermediate relay K5 and one end of the sixth intermediate relay K6, and the other end of the fifth intermediate relay K5 and the other end of the sixth intermediate relay K6 are connected with a zero wire of the second line 120; the other end of the discharge switch 320 is connected to the B1 port of the main circuit terminal plate 140.
In this embodiment, the process of opening the charge switch 310 and closing the discharge switch 320 is as follows: the first movable switch button S1 is closed for a short time, the upper part of the first automatic transfer switch ST1 is closed, the lower part of the first automatic transfer switch ST1 is opened, the second intermediate relay K2 is powered off, the first time relay KT1 is opened, and the charging switch 310 is opened; at this time, the second moving-closing button S2 is opened for a short time, the second automatic transfer switch ST2 is opened upward and closed downward, the fifth intermediate relay K5 is energized, the second time relay KT2 is closed, and the discharge switch 320 is closed.
The process of opening discharge switch 320 and closing charge switch 310 is as follows: the second movable switch button S2 is closed in a short time, the upper part and the lower part of the second automatic transfer switch ST2 are closed, the fifth intermediate relay K5 is powered off, the second time relay KT2 is powered off, and the discharge switch 320 is powered off; at the moment, the first movable closing button S1 is opened for a short time, the upper part of the first automatic change-over switch ST1 is opened, the lower part of the first automatic change-over switch ST1 is closed, the second intermediate relay K2 is electrified, the first time relay KT1 is closed, and the discharge switch 320 is closed.
Further, the first interlock circuit further includes a first closing indicator H1 for indicating an open/close state of the charging switch 310, one end of the first closing indicator H1 is connected to the live wire of the first line 110, and the other end of the first closing indicator H1 is connected to the a1 port of the main circuit terminal block 140. When the charging switch 310 is turned off, the first closing indicator lamp H1 goes out; when the charging switch 310 is closed, the first closing indicator lamp H1 lights.
Further, the second linkage circuit further includes a second closing indicator H2 for indicating the open/close state of the charging switch 310, one end of the second closing indicator H2 is connected to the live wire of the second line 120, and the other end of the second closing indicator H2 is connected to the b1 port of the main circuit terminal block 140. When the discharge switch 320 is turned off, the second closing indicator lamp H2 goes out; when the discharge switch 320 is closed, the second closing indicator lamp H2 lights.
Further, a first fuse FU1 is provided between the first interlock circuit and the live wire of the first line 110. When the charging current of the live wire of the first line 110 is too large, the first fuse FU1 is opened to perform a protection function.
Further, a second fuse FU2 is provided between the second linkage circuit and the live line of the second line 120. When the discharging current of the live wire of the second line 120 is too large, the second fuse FU2 is opened to perform a protection function.
Further, the line conductor of the first line 110 and the line conductor of the second line 120 are three-phase lines.
Referring to fig. 2, another embodiment of the present invention, a charge/discharge automatic switching system, includes: the charging and discharging automatic switching device 10 comprises an energy storage converter 20, an energy storage monitoring device 30 and the charging and discharging automatic switching device 10, wherein the charging and discharging automatic switching device 10 is in communication connection with the energy storage converter 20 and the energy storage monitoring device 30.
In this embodiment, the energy storage monitoring device 30 is used to monitor the energy storage system. The energy storage converter 20 controls charging and discharging of the energy storage system to perform ac/dc conversion. The charging grid-connected line and the discharging grid-connected line are separated through the charging and discharging automatic switching device 10, so that the charging and discharging energy of the energy storage system power grid can be transferred in space, and the problem of heavy overload of the line is solved; by utilizing the characteristic of strong charging capability of the energy storage terminal in the valley period, the peak-time electric quantity of the feeder terminal connected with the discharge output port 220 is transferred to the valley electric quantity of the energy storage terminal, so that the maximum efficiency of the energy storage system is exerted. The problem of energy storage resource waste caused by low energy storage peak shifting and valley filling capacity due to the fact that a single access point carries out charging and discharging on the same line is solved.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.
Claims (10)
1. Charge-discharge automatic switching control equipment, its characterized in that includes:
one end of the first line is a charging input port;
one end of the second line is a discharge output port;
one end of the third line is connected with the other end of the first line and the other end of the second line, and the other end of the third line is a connecting port for connecting the energy storage converter;
an interlock including a charge switch disposed on the first line and a discharge switch disposed on the second line; the charging switch and the discharging switch form a lock; one of the charging switch and the discharging switch is closed, and the other is opened;
and the control module is used for controlling the actions of the charging switch and the discharging switch and is in communication connection with the energy storage converter and the energy storage monitoring device through the communication module.
2. The charge-discharge automatic switching device according to claim 1, wherein said interlock includes a main circuit terminal block, a first interlock circuit, and a second interlock circuit, said charge switch being located in said first interlock circuit, said discharge switch being located in said second interlock circuit, said first interlock circuit and said second interlock circuit being connected to said main circuit terminal block.
3. The charge-discharge automatic switching device according to claim 2, wherein the first link circuit includes a first time relay, a first moving button, a first automatic transfer switch, a first intermediate relay, a second intermediate relay, and a third intermediate relay; one end of the first time relay, one end of the first dynamic switch button, one end of the third intermediate relay and one end of the charging switch are connected with a live wire of the first line, the other end of the first time relay is connected with one end of the second intermediate relay, the other end of the first dynamic switch button and the other end of the first intermediate relay are both connected with one end of the first automatic change-over switch, the other end of the first automatic change-over switch is connected with one end of the second intermediate relay and one end of the third intermediate relay, and the other end of the second intermediate relay and the other end of the third intermediate relay are both connected with a zero line of the first line; the other end of the charging switch is connected with the main circuit wiring board.
4. The automatic charging and discharging switching device according to claim 3, wherein the first linkage circuit further comprises a first closing indicator for indicating an open/close state of the charging switch, one end of the first closing indicator is connected to the live wire of the first line, and the other end of the first closing indicator is connected to the main circuit connection board.
5. The charge-discharge automatic switching device according to claim 2, wherein the second linkage circuit includes a second time relay, a second moving-on button, a second automatic transfer switch, a fourth intermediate relay, a fifth intermediate relay and a sixth intermediate relay; one end of the second time relay, one end of the second dynamic switch button, one end of the sixth intermediate relay and one end of the discharge switch are connected with the live wire of the second line, the other end of the second time relay is connected with one end of the fifth intermediate relay, the other end of the second dynamic switch button and the other end of the fourth intermediate relay are both connected with one end of the second automatic change-over switch, the other end of the second automatic change-over switch is connected with one end of the fifth intermediate relay and one end of the sixth intermediate relay, and the other end of the fifth intermediate relay and the other end of the sixth intermediate relay are both connected with the zero line of the second line; the other end of the discharge switch is connected with the main circuit wiring board.
6. The automatic charging and discharging switching device according to claim 5, wherein the second linkage circuit further comprises a second closing indicator for indicating an open/close state of the charging switch, one end of the second closing indicator is connected to the live wire of the second line, and the other end of the second closing indicator is connected to the main circuit connection board.
7. The automatic charging and discharging switching device according to claim 2, wherein a first fuse is provided between the first linkage circuit and the live line of the first line.
8. The automatic charging and discharging switching device according to claim 2, wherein a second fuse is provided between the second linkage circuit and the live line of the second line.
9. The charge-discharge automatic switching device according to claim 1, wherein the live line of the first line and the live line of the second line are both three-phase lines.
10. The automatic charging and discharging switching system is characterized by comprising an energy storage converter, an energy storage monitoring device and the automatic charging and discharging switching device according to any one of claims 1 to 9, wherein the automatic charging and discharging switching device is in communication connection with the energy storage converter and the energy storage monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350679.0U CN213879292U (en) | 2020-10-20 | 2020-10-20 | Automatic charge-discharge switching device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350679.0U CN213879292U (en) | 2020-10-20 | 2020-10-20 | Automatic charge-discharge switching device and system |
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| CN213879292U true CN213879292U (en) | 2021-08-03 |
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| CN202022350679.0U Active CN213879292U (en) | 2020-10-20 | 2020-10-20 | Automatic charge-discharge switching device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771675A (en) * | 2021-10-09 | 2021-12-10 | 南方电网数字电网研究院有限公司 | Ordered charging method and system |
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- 2020-10-20 CN CN202022350679.0U patent/CN213879292U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113771675A (en) * | 2021-10-09 | 2021-12-10 | 南方电网数字电网研究院有限公司 | Ordered charging method and system |
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