Control device for isolating switch and isolating switch system
Through the combination of motor drive and current direction switching unit and power supply switching switch, the automatic control of the isolating switch is realized, and the problems of complex control, high cost and insufficient robustness in the prior art are solved, which significantly reduces manufacturing costs and improves the stability and safety of the system.
Patent Information
- Application Number
- CN202311153309.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-07
- Publication Date
- 2025-03-07
AI Technical Summary
The existing electric isolating switches have complex control methods, high cost and are not robust enough in high voltage environments, making it difficult to achieve automated control of the isolating switches.
The motor drives the isolating switch, and the automatic on and off operation of the isolating switch is achieved through the current direction switching unit and the power supply switching switch, ensuring good robustness in high voltage environments.
Automatic control of the isolating switch is realized, reducing the complexity and manufacturing cost of the control device, and showing good stability and safety in high voltage environments.
Smart Images
Figure CN119581264A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a control device for a disconnector switch and a disconnector switch system. Background Art
[0002] With the development of the new energy industry, battery energy storage systems are becoming more and more important. In battery energy storage systems, circuit breakers are required to directly disconnect and connect the energy storage system circuit, as well as disconnectors, which act as protection devices to perform opening and closing operations.
[0003] In today's market, there is an increasing demand for electric isolating switches that can be remotely controlled. This electric isolating switch is realized by a fusion switch that integrates the primary device and the secondary device. Usually, the on and off of this fusion switch is controlled by a complex circuit board (PCBA) arranged inside. However, this circuit board-based control method is complex to implement, expensive, and not robust enough in high voltage environments. In response to these problems, it is necessary to develop a new control device for isolating switches. Summary of the invention
[0004] The present disclosure provides a control device for an isolating switch, which can automatically realize the on and off operations of the isolating switch through a motor, and its implementation is simple, and therefore it can be manufactured at a lower cost, and has good robustness in a high voltage environment.
[0005] The present disclosure provides a control device for an isolating switch, the control device comprising a motor for driving the isolating switch to be turned on and off, wherein when the motor rotates in a first direction, the isolating switch changes from being turned off to being turned on, and when the motor rotates in a second direction, the isolating switch changes from being turned on to being turned off; a current direction switching unit comprising a first power supply terminal, a second power supply terminal, a ground terminal, and a current direction switching switch, wherein when the current direction switching switch is connected to the first power supply terminal and the ground terminal, the motor rotates in the first direction, and when the current direction switching switch is connected to the second power supply terminal and the ground terminal, the motor rotates in the second direction; and a power supply switching switch, the power supply switching switch is coupled to the isolating switch, wherein after the isolating switch is turned on, the power supply switching switch is connected to the second power supply terminal, and after the isolating switch is turned off, the power supply switching switch is connected to the first power supply terminal.
[0006] In an embodiment according to the present disclosure, the grounding terminal includes a first grounding terminal and a second grounding terminal, wherein when the current direction switching switch connects the first power supply terminal and the first grounding terminal, the motor rotates in a first direction, and when the current direction switching switch connects the second power supply terminal and the second grounding terminal, the motor rotates in a second direction.
[0007] In an embodiment according to the present disclosure, the current direction switching switch is constructed as a two-open and two-close relay, or is constructed as two one-open and one-close relays.
[0008] In an embodiment according to the present disclosure, the power supply switch is configured as a single-pole double-set switch.
[0009] In an embodiment according to the present disclosure, the control device further includes a power supply unit, which includes: an energy storage unit for supplying power to the motor; and a charging unit for charging the energy storage unit through external power supply.
[0010] In an embodiment according to the present disclosure, the energy storage unit is configured as a supercapacitor.
[0011] In an embodiment according to the present disclosure, the control device includes a power disconnect switch connected in series with the motor.
[0012] In an embodiment according to the present disclosure, the control device further includes a current limiting unit connected in series with the power supply switch.
[0013] In an embodiment according to the present disclosure, the power supply switch is mechanically coupled to the isolation switch.
[0014] The present disclosure also provides an isolating switch system, which includes an isolating switch; a control device for the isolating switch as described above, and a signal management device for sending a switching control signal to the current direction switching switch.
[0015] In the control device and isolating switch system for the isolating switch according to the present disclosure, the motor can be rotated in different directions by switching the current direction switching switch between different power supply terminals, so that the isolating switch can be driven to perform on and off operations. In addition, by coupling the isolating switch with the power supply switching switch, the motor can be automatically powered off when the isolating switch reaches the on state or the off state, thereby preventing the motor from being blocked and the damage caused by continuing to drive the isolating switch. Compared with the prior art, the control device according to the present disclosure realizes automatic control of the on and off of the isolating switch without a circuit board (PCBA), thereby reducing the complexity and manufacturing cost of the control device for the isolating switch. In addition, in the case of realizing the current direction switching switch by a relay, the control device and isolating switch system for the isolating switch according to the present disclosure have good robustness on the primary side, that is, under high voltage. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for describing the embodiments. The drawings described below are only exemplary embodiments of the present disclosure.
[0017] Figure 1 A schematic circuit diagram of a control device for an isolating switch according to an embodiment of the present disclosure is shown.
[0018] Figure 2 shows a schematic circuit diagram of a control device for an isolating switch according to another embodiment of the present disclosure,
[0019] Figure 3 A schematic circuit diagram of a control device for an isolating switch according to another embodiment of the present disclosure is shown, and
[0020] Figure 4 A schematic circuit diagram of an isolating switch system according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the present disclosure more obvious, the exemplary embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure, and it should be understood that the present disclosure is not limited to the exemplary embodiments described here.
[0022] In this specification and the accompanying drawings, substantially the same or similar steps and elements are represented by the same or similar reference numerals, and repeated descriptions of these steps and elements will be omitted. At the same time, in the description of the present disclosure, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance or ranking.
[0023] In this specification and the accompanying drawings, elements are described in singular or plural form, depending on the embodiment. However, the singular and plural forms are appropriately selected for the proposed situation only for the convenience of explanation and are not intended to limit the present disclosure thereto. Therefore, the singular form may include the plural form, and the plural form may also include the singular form, unless the context clearly indicates otherwise.
[0024] Figure 1 FIG. 1 shows a schematic circuit diagram of a control device 100 for an isolating switch according to an embodiment of the present disclosure. Figure 1 As shown, the control device 100 for the isolating switch includes a motor 120, which is, for example, mechanically linked with the isolating switch, and is used to drive the isolating switch to perform a connection operation and a disconnection operation. When the motor 120 rotates in a first direction, such as forward rotation, the isolating switch changes from disconnection to connection, and when the motor 120 rotates in a second direction, such as reverse rotation, the isolating switch changes from connection to disconnection. The control device 100 also includes a current direction switching unit 110, which includes a first power supply terminal 111, a second power supply terminal 112, a ground terminal 113, and a current direction switching switch 114. When the current direction switching switch 114 is connected to the first power supply terminal 111 and the ground terminal 113, the motor rotates in the first direction, and when the current direction switching switch 114 is connected to the second power supply terminal 112 and the ground terminal 113, the motor rotates in the second direction. The control device 100 also includes a power supply switching switch 130, which is coupled to the isolating switch. After the isolation switch is turned on, the power supply switch 130 is connected to the second power supply end 112 , and after the isolation switch is turned off, the power supply switch is connected to the first power supply end 111 .
[0025] In an embodiment according to the present disclosure, for example, when it is desired to turn on the isolating switch, the current direction switching switch 114 connects the first power supply terminal 111 and the ground terminal 113, and the power supply switching switch 130 is connected to the first power supply terminal 111. As a result, the current flows through the motor 120 in the positive current direction, and causes the motor 120 to rotate in the first direction, and thus drives the isolating switch to change from the disconnected state to the connected state, that is, to perform a closing operation. After the isolating switch is turned on, based on the coupling between the isolating switch and the power supply switching switch 130, the isolating switch drives the power supply switching 130 to disconnect from the first power supply terminal 111 and connect to the second power supply terminal 112. Through this coupling, after the isolating switch is turned on, the circuit is automatically powered off, and the motor 120 can no longer rotate in the first direction. In an embodiment according to the present disclosure, the coupling of the power supply switching switch 130 with the isolating switch can be achieved, for example, mechanically.
[0026] In a similar manner, for example, when it is desired to disconnect the isolating switch, the current direction switching switch 114 connects the first power supply terminal 112 and the ground terminal 113, and the power supply switching switch 130 is connected to the second power supply terminal 112. As a result, the current flows through the motor 120 in the reverse current direction, and causes the motor 120 to rotate in the second direction, and thus drives the isolating switch to change from the on state to the off state, that is, to perform a tripping operation. After the isolating switch is disconnected, based on the coupling between the isolating switch and the power supply switching switch 130, the isolating switch drives the power supply switching 130 to disconnect from the second power supply terminal 112 and connect to the first power supply terminal 111. Through this coupling, after the isolating switch is disconnected, the circuit is automatically powered off, and the motor 120 can no longer rotate in the second direction.
[0027] In the embodiment according to the present disclosure, the motor 120 is rotated in different directions by switching the current direction switching switch 110 between different power supply terminals, so that the isolating switch can be driven to perform on and off operations. In addition, by coupling the isolating switch with the power supply switching switch 130, the isolating switch can automatically cut off the power to the motor when it reaches the on state or the off state, thereby preventing the motor from being blocked and the damage caused by continuing to drive the isolating switch. Compared with the prior art, the control device according to the present disclosure realizes automatic control of the on and off of the isolating switch without a circuit board (PCBA).
[0028] Figure 2 FIG. 2 shows a schematic circuit diagram of a control device for an isolating switch according to another embodiment of the present disclosure. Figure 2 In the illustrated embodiment, the ground terminal 113 includes a first ground terminal 1131 and a second ground terminal 1132. This arrangement allows the first ground terminal 1131 and the second ground terminal 1132 to have independent connection terminals, respectively, from the outside of the current direction switching unit 110, so that the current direction switching unit 110 can be wired more flexibly. In addition, the two power supply terminals and the two ground terminals can, for example, cooperate with the switching states of the two sub-switches of the current direction switching switch 114 to form a pair of normally open contacts and a pair of normally closed contacts. In an embodiment according to the present disclosure, for example, the current direction switching switch 114 can be constructed as a two-open and two-closed relay 114, or the two sub-switches of the current direction switching switch 114 can be constructed as two one-open and one-closed relays 1141 and 1142. Regardless of the construction method, the current direction switching switch 114 can, for example, have a normally open state or a normally closed state. When the current direction switching switch 114 is connected to the first power supply terminal 111 and the first ground terminal 1132, the motor 120 rotates in a first direction, and when the current direction switching switch 114 is connected to the second power supply terminal 112 and the second ground terminal 1131, the motor 120 rotates in a second direction.
[0029] In the embodiment of the present disclosure, the power supply switch 130 can be configured as a single-pole double-position switch, for example. The power supply switch 130 in the form of a single-pole double-position switch can well implement the selection function between the first power supply terminal 111 and the second power supply terminal 112 .
[0030] Figure 3 A schematic circuit diagram of a control device 300 for an isolating switch according to another embodiment of the present disclosure is shown. In the embodiment according to the present disclosure, the control device further includes a power supply unit 310. The power supply unit 310 includes: an energy storage unit 312, which is used to supply power to the motor; and a charging unit 311, which is used to charge the energy storage unit 312 through external power supply.
[0031] In an embodiment according to the present disclosure, the power supply unit 310 can be connected in parallel with an external power supply, for example. In this case, the motor can be powered by both the external power supply and the power supply unit 310. For example, when the external power supply is powered off, the power supply unit 310 can maintain the power supply to the motor. In an embodiment according to the present disclosure, for example, an initial state can be set. In the initial state, the power supply switching switch 130 remains disconnected, that is, neither the first power supply terminal 111 nor the second power supply terminal 112 is connected, and the external power supply is used to power the power supply unit 310, and the energy storage unit 312 is charged through the charging unit 311.
[0032] In an embodiment according to the present disclosure, for example, the current direction switching switch 114 is constructed as a relay, and the normally closed state of the relay corresponds to the opening operation of the isolating switch from being on to being off. When the isolating switch is in the on state, that is, the closed state (the power supply switching switch 130 is switched to power the opening operation), if the external power supply fails, the auxiliary coil of the relay will be de-energized, and the relay will return to the normally closed state under the action of, for example, a spring. At this time, the energy storage unit 312 will supply power instead of the external power supply, and based on the above-mentioned states of the power supply switching switch 130 and the current direction switching switch 140, the control device 300 automatically drives the isolating switch to perform the opening operation after the external power supply fails. According to this embodiment of the present disclosure, the opening operation of the isolating switch after power failure can be automatically realized without a circuit board.
[0033] According to an embodiment of the present disclosure, for example, the power supply unit 310 may be connected in series with an external power supply, so that the control device 310 is always powered by the external power supply 310. This form of control device 310 can avoid the impact of power failure of the external power supply.
[0034] In an embodiment according to the present disclosure, the energy storage unit 312 may be configured as, for example, a supercapacitor, a battery, etc. In an embodiment according to the present disclosure, the charging unit 311 may be configured as, for example, a DC-DC converter, so as to convert a DC voltage of an external power supply into a voltage suitable for charging the energy storage unit 312.
[0035] In an embodiment according to the present disclosure, Figure 3 As shown, the control device 300 may further include, for example, a current limiting unit 320 connected in series with the power supply switching switch 130. The current limiting unit 320 may be, for example, a separate current limiting element, such as a current limiting resistor, or may also be a current limiting circuit. The current limiting unit 320 may suppress a large starting current when the motor 120 is started, thereby preventing the entire control device or its circuit from being overloaded, overheated, or even burned.
[0036] In an embodiment according to the present disclosure, Figure 3 As shown, the control device may further include, for example, a power-off switch 330 connected in series with the motor 120. The power-off switch 330 may also be referred to as an automatic-manual switching switch. When the power-off switch 330 is turned on, the control device 300 may drive the isolating switch through the motor 120. When the power-off switch 330 is turned off, the motor 120 is powered off. At this time, the isolating switch may be driven manually. The manual method is suitable, for example, for the case of overhauling and maintaining the isolating switch.
[0037] Figure 4 : A schematic circuit diagram of an isolating switch system 400 according to an embodiment of the present disclosure is shown. The isolating switch system 400 includes an isolating switch 410 itself; a control device 420 for the isolating switch, which can be configured as any one of the embodiments of the present disclosure described above; and a signal management device 430, which is used to send a switching control signal to the current direction switching switch 114, such as a switch-on signal and a switch-off signal to control the switch state of the current direction switching switch 114.
[0038] In the control device and isolating switch system for isolating switch according to the present disclosure, the motor can be rotated in different directions by switching the current direction switching switch between different power supply ends, so that the isolating switch can be driven to perform on and off operations. In addition, the isolating switch can be coupled with the power supply switching switch to automatically cut off the power of the motor when it reaches the on state or the off state, thereby preventing the motor from being blocked and the damage caused by continuing to drive the isolating switch. Compared with the prior art, the control device according to the present disclosure realizes automatic control of the on and off of the isolating switch without a circuit board (PCBA), thereby reducing the complexity and manufacturing cost of the control device for the isolating switch. In addition, in the case of realizing the current direction switching switch by a relay, the control device and isolating switch system for isolating switch according to the present disclosure have good robustness on the primary side, that is, under high voltage. In addition, the control device and isolating switch system for isolating switch according to the present disclosure can automatically drive the isolating switch to perform a gate opening operation after the external power supply fails.
[0039] The block diagrams of circuits, units, devices, apparatuses, equipment, and systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these circuits, units, devices, apparatuses, equipment, and systems may be connected, arranged, or configured in any manner as long as the desired purpose can be achieved. The circuits, units, devices, and apparatuses involved in the present disclosure may be implemented in any suitable manner.
[0040] Those skilled in the art should understand that the above-mentioned specific embodiments are merely examples and not limitations, and various modifications, combinations, partial combinations and replacements may be made to the embodiments of the present disclosure according to design requirements and other factors. As long as they are within the scope of the attached claims or their equivalents, they belong to the scope of rights to be protected by the present disclosure.
Claims
1. A control device for an isolating switch, comprising: A motor is used to drive the disconnection of the disconnecting switch, wherein when the motor rotates in a first direction, the disconnecting switch changes from disconnection to connection, and when the motor rotates in a second direction, the disconnecting switch changes from connection to disconnection, The current direction switching unit includes a first power supply terminal, a second power supply terminal, a ground terminal and a current direction switching switch, wherein: When the current direction switching switch is connected to the first power supply terminal and the ground terminal, the motor rotates in a first direction, and when the current direction switching switch is connected to the second power supply terminal and the ground terminal, the motor rotates in a second direction, and A power supply switching switch is coupled to the isolation switch, wherein after the isolation switch is turned on, the power supply switching switch is connected to the second power supply end, and after the isolation switch is turned off, the power supply switching switch is connected to the first power supply end.
2. The control device according to claim 1, wherein: The grounding terminal includes a first grounding terminal and a second grounding terminal, wherein when the current direction switching switch is connected to the first power supply terminal and the first grounding terminal, the motor rotates in a first direction, and when the current direction switching switch is connected to the second power supply terminal and the second grounding terminal, the motor rotates in a second direction.
3. The control device according to claim 1, wherein: The current direction switching switch is constructed as a two-open and two-close relay, or is constructed as two one-open and one-close relays.
4. The control device according to claim 1, wherein: The power supply switch is configured as a single-pole double-position switch.
5. The control device according to claim 1, wherein: The control device further comprises a power supply unit, wherein the power supply unit comprises: an energy storage unit for supplying power to the electric motor, and A charging unit is used to charge the energy storage unit through external power supply.
6. The control device according to claim 5, wherein: The energy storage unit is designed as a supercapacitor.
7. The control device according to claim 1, wherein: The control device includes a power disconnect switch connected in series with the motor.
8. The control device according to claim 1, wherein: The control device further includes a current limiting unit connected in series with the power supply switch.
9. The control device according to claim 1, wherein a power supply changeover switch is mechanically coupled to the isolation switch.
10. An isolating switch system, comprising Isolating switch, A control device for a disconnect switch according to any one of claims 1 to 9, and A signal management device is used to send a switching control signal to the current direction switching switch.