Power supply switching system and automatic switching switch

Abstract

The invention provides a power supply switching system and an automatic change-over switch. The automatic change-over switch comprises at least two circuit breakers, a control unit and a communication unit, the input end of each circuit breaker in the at least two circuit breakers is electrically connected with the corresponding power supply, and the output end of each circuit breaker in the at least two circuit breakers is electrically connected with the corresponding load; each circuit breaker comprises a monitoring subunit and an operation subunit, the monitoring subunit is used for detecting the first circuit state of each circuit breaker, and the operation subunit is used for controlling the on-off of each circuit breaker; the control unit is electrically connected with the monitoring subunit and the operation subunit of each circuit breaker, the control unit is used for sending a first control instruction to the operation subunit of each circuit breaker according to the first circuit state of each circuit breaker, and the first control instruction is used for controlling the operation subunit to operate; and the communication unit is electrically connected with the monitoring subunit of each circuit breaker and is used for sending the first circuit state of each circuit breaker to the monitoring device.

Description

Technical Field

[0001] The present invention relates to the field of electric power, and in particular to a power supply switching system and an automatic switching switch. Background Art

[0002] Important users of the power system, such as power-using places with special requirements for power supply reliability, play an important role in the social, political and economic life of a country or a region (city). Power outages to them may cause great damage, including but not limited to personal injury, serious environmental pollution, great political impact, great economic losses, and serious disruption of social public order. At present, dual-power supply is adopted for important users, but the power monitoring center cannot monitor the power supply of important users. Summary of the invention

[0003] The present invention aims to solve the problem in the prior art that the power supply situation of important users cannot be monitored, and proposes a power switching system and an automatic switching switch.

[0004] In a first aspect, an embodiment of the present invention provides an automatic transfer switch, the automatic transfer switch comprising at least two circuit breakers, a control unit and a communication unit; The input end of each circuit breaker of at least two circuit breakers is electrically connected to the corresponding power supply, and the output end of each circuit breaker of at least two circuit breakers is electrically connected to the corresponding load; Each circuit breaker comprises a monitoring subunit and an operating subunit, wherein the monitoring subunit is used to detect a first circuit state of each circuit breaker, and the operating subunit is used to operate the on and off of each circuit breaker; The control unit is electrically connected to the monitoring subunit and the operating subunit of each circuit breaker, and the control unit is used to send a first control instruction to the operating subunit of each circuit breaker according to the first circuit state of each circuit breaker, and the first control instruction is used to control the operating subunit to operate; The communication unit is electrically connected to the monitoring subunit of each circuit breaker, the communication unit is communicatively connected to the monitoring device, and the communication unit is used to send the first circuit state of each circuit breaker to the monitoring device.

[0005] In one embodiment, at least one circuit breaker of the at least two circuit breakers is an electronic trip circuit breaker.

[0006] In one embodiment, the communication unit further comprises a communication subunit and a dual-channel carrier subunit, and the communication subunit is electrically connected to the dual-channel carrier subunit; The communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and the communication subunit is used to receive the first circuit state of each circuit breaker; The dual-channel carrier subunit is electrically connected to the monitoring device, and is used to convert the received first circuit state into a second circuit state, where the second circuit state is a circuit state in a first preset format.

[0007] In one embodiment, the first preset format includes a Q / GDW376-2012 format.

[0008] In one embodiment, the communication subunit includes a first communication subunit and a second communication subunit, and the first communication subunit is electrically connected to the second communication subunit; The first communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and the first communication subunit is used to receive the first circuit state of each circuit breaker; The second communication subunit is electrically connected to the dual-channel carrier subunit, and the second communication subunit is used to send the first circuit state to the dual-channel carrier subunit.

[0009] In one embodiment, the first communication subunit and the detection subunit use the MODBUS protocol for transmission; And / or, the first communication subunit and the second communication subunit use RS485 for transmission.

[0010] In one embodiment, the communication unit is also electrically connected to the operation subunit; The communication unit is also used to receive a second control instruction sent by the monitoring device, and send the second control instruction to a corresponding circuit breaker among the at least two circuit breakers, wherein the second control instruction is used to control the operation subunit to perform an operation.

[0011] In one embodiment, the automatic switching switch further comprises a temperature sensor, and the temperature sensor is used to detect the temperature of the automatic switching switch; The temperature sensor is electrically connected to the communication unit, and the communication unit is used to receive the temperature and send the temperature to the monitoring device.

[0012] In one embodiment, the temperature sensor and the communication unit are transmitted via RS485.

[0013] In a second aspect, an embodiment of the present invention provides a power switching system, which includes an automatic switching switch as described in any one of the first aspects, and a monitoring device, which is communicatively connected to the automatic switching switch and is used to receive a circuit status sent by the automatic switching switch.

[0014] The power switching system and automatic switching switch provided by the present invention have the following technical effects: On the one hand, by acquiring the first circuit state through the control unit, real-time control of the circuit where the circuit breaker is located can be achieved. When there is a fault in the circuit, the circuit breaker can promptly interrupt the power supply of the faulty circuit and switch the power supply of the alternative circuit, thereby improving the safety of electricity use and avoiding the loss caused by the power supply terminal to the load; on the other hand, the first circuit state is promptly transmitted to the monitoring device 6 through the communication unit, which can comprehensively monitor the power supply situation of important users, realize high-reliability power supply with timely grasp and rapid processing of faults, improve the response efficiency of circuit faults, and improve user experience.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 A first structural schematic diagram of automatic switching provided by an exemplary embodiment of the present invention;.

[0017] Figure 2 A schematic structural diagram of a contactor-type mutual-throwing mechanism provided by an exemplary embodiment of the present invention; Figure 3 A schematic structural diagram of a molded case circuit breaker provided by an exemplary embodiment of the present invention; Figure 4 A schematic structural diagram of a load isolation switch type transfer switch electrical appliance provided by an exemplary embodiment of the present invention; Figure 5 A second structural schematic diagram of automatic switching provided by an exemplary embodiment of the present invention; Figure 6 A third structural schematic diagram of automatic switching provided by an exemplary embodiment of the present invention; Figure 7 A schematic structural diagram of a power switching system provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0019] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0020] An exemplary embodiment of the present invention provides an automatic switching switch, see Figure 1 The automatic transfer switch includes at least two circuit breakers 1, a control unit 2 and a communication unit 3.

[0021] The input end of each circuit breaker 1 of at least two circuit breakers 1 is electrically connected to the corresponding power supply 4. Specifically, the number of circuit breakers 1 generally corresponds to the number of power supplies 4. For example, two power supplies 4 correspond to two circuit breakers 1 to achieve precise protection for power supplies from different power sources and improve the safety of the power supply system.

[0022] The output end of each circuit breaker 1 of at least two circuit breakers 1 is electrically connected to the corresponding load 5. Specifically, the number of loads 1 can generally be only one or more, but one load 1 requires at least two power supplies 4 to power it, so as to improve the protection of power supply safety for the load 5. The load can be the load of the important user mentioned in this embodiment.

[0023] Specifically, each circuit breaker 1 includes a monitoring subunit and an operating subunit. The monitoring subunit is used to detect the first circuit state of each circuit breaker, and the operating subunit is used to operate the on and off of each circuit breaker 1 .

[0024] The control unit 3 is electrically connected to the monitoring subunit and the operating subunit of each circuit breaker. The control unit 3 is used to send a first control instruction to the operating subunit of each circuit breaker 1 according to the first circuit state of each circuit breaker 1. The first control instruction is used to control the operating subunit to operate.

[0025] For example, when the first control instruction is to control the circuit where the circuit breaker 1 is located to be disconnected, the operating subunit executes to control the circuit breaker 1 to be disconnected; when the first control instruction is to control the circuit where the circuit breaker 1 is located to be connected, the operating subunit executes to control the circuit breaker 1 to be connected.

[0026] The communication unit 4 is electrically connected to the monitoring subunit of each circuit breaker 1 , and the communication unit 4 is communicatively connected to the monitoring device 6 . The communication unit is used to send the first circuit state of each circuit breaker 1 to the monitoring device 6 .

[0027] The first circuit state includes but is not limited to any one or more of the following: switch state of the circuit breaker, voltage and current of the circuit, etc. The monitoring device 6 can perform operations such as early warning, display, prompt, and switch on / off control based on the received first circuit state, which will not be described in detail here.

[0028] In this embodiment, on the one hand, by acquiring the first circuit state through the control unit, real-time control of the circuit where the circuit breaker is located can be achieved. When there is a fault in the circuit, the circuit breaker can promptly interrupt the power supply of the faulty circuit and switch the power supply of the alternative circuit, thereby improving the safety of electricity use and avoiding the loss caused by the power supply terminal to the load; on the other hand, the first circuit state is promptly transmitted to the monitoring device 6 through the communication unit, which can comprehensively monitor the power supply situation of important users, realize high-reliability power supply with timely grasp and rapid processing of faults, improve the response efficiency of circuit faults, and improve user experience.

[0029] In one embodiment, regarding the type of circuit breaker, the following types are provided in this embodiment: Contactor type mutual investment mechanism, see Figure 2 The contactor type mutual investment mechanism uses a contactor to switch the circuit on and off, and the operating subunit uses an intermediate relay or a logic control module.

[0030] Molded case circuit breakers, see Figure 3 The molded case circuit breaker uses the molded case circuit breaker QF1 to implement circuit on-off switching, and the operating subunit adopts the ATS (automatic transfer switch) automatic control unit.

[0031] Load isolation switch type transfer switch, see Figure 4 The load isolation switch type transfer switch electrical appliance uses two load isolation switches QS1 to switch the circuit on and off, and is integrated with an electric operating mechanism (i.e., the operating subunit described in this embodiment), a mechanical interlocking mechanism, and an automatic control unit (the mechanical interlocking mechanism and the automatic control unit are equivalent to the control unit 2 in this embodiment) installed on the basis of the load isolation switch QS1.

[0032] The electronic trip circuit breaker integrates the switch (circuit on / off control and operation subunit) and the logic control (i.e., the control unit 2 in this embodiment) in one, without the need for an external controller, and truly realizes an electromechanical integrated automatic transfer switch. The electronic trip circuit breaker adopts a "single-pole double-throw" design, is uniformly designed and manufactured, has a small size, and a simple structure. The electronic trip circuit breaker generally has a relatively short switching time, and the circuit on / off control is driven by a motor, and the switching is smooth and reliable. The operator motor drive only has current passing through at the moment of circuit on / off control, and no working current is required in steady state, which saves energy significantly. The product does not have temperature rise, heating, contact adhesion, or coil burning. The switch is equipped with an electromechanical interlocking device, which can realize automatic switching and self-recovery, automatic switching without self-recovery, loss of pressure, undervoltage, phase failure protection, manual-automatic switching, and delay control.

[0033] Therefore, the circuit breaker in this embodiment is preferably an electronic trip circuit breaker. Specifically, at least one circuit breaker among the at least two circuit breakers is an electronic trip circuit breaker.

[0034] In one embodiment, the communication unit 3 further comprises a communication subunit and a dual-channel carrier subunit, wherein the communication subunit is electrically connected to the dual-channel carrier subunit, the communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and the communication subunit is used to receive the first circuit state of each circuit breaker 1 .

[0035] The dual-channel carrier subunit is electrically connected to the monitoring device 6, and the connection mode between the dual-channel carrier subunit and the monitoring device 6 includes wireless communication connection or wired communication connection. The dual-channel carrier subunit is used to convert the received first circuit state into a second circuit state, and the second circuit state is a circuit state of a first preset format, and the first preset format includes a Q / GDW376-20 format.

[0036] Specifically, the communication subunit includes a first communication subunit and a second communication subunit, and the first communication subunit is electrically connected to the second communication subunit.

[0037] The first communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and is used to receive the first circuit state of each circuit breaker. The second communication subunit is electrically connected to the dual-channel carrier subunit, and is used to send the first circuit state to the dual-channel carrier subunit.

[0038] The first communication subunit may be a MODBUS switch communication subunit, and the first communication subunit and the detection subunit use the MODBUS protocol for transmission. The second communication subunit may be a COMXBOX communication subunit, and the first communication subunit and the second communication subunit use the RS485 protocol for transmission.

[0039] In one embodiment, the communication unit 3 is also electrically connected to the operation subunit.

[0040] The communication unit 3 is further used to receive a second control instruction sent by the monitoring device 6, and send the second control instruction to a corresponding circuit breaker 1 among the at least two circuit breakers 1, wherein the second control instruction is used to control the operation subunit to perform manipulation.

[0041] For example, when the second control instruction is to control the circuit where the circuit breaker 1 is located to be disconnected, the operating subunit executes to control the circuit breaker 1 to be disconnected; when the second control instruction is to control the circuit where the circuit breaker 1 is located to be connected, the operating subunit executes to control the circuit breaker 1 to be connected.

[0042] In one embodiment, the automatic switch further includes a temperature sensor, which is used to detect the temperature of the automatic switch; the temperature sensor is electrically connected to the communication unit 3, and the communication unit is used to receive the temperature and send the temperature to the monitoring device 6. Similarly, the temperature sensor and the communication unit are transmitted in RS485.

[0043] by Figure 5 and Figure 6 Take the following as an example to illustrate a specific implementation of the automatic switching switch in this embodiment: Power source 41 and power source 42 are selected to be sent to circuit breaker QF3 through an automatic switching switch, and finally sent to the load of important users.

[0044] The dual-channel carrier subunit is a power carrier module with dual-channel dual-active technology. The monitoring subunit 1 of the circuit breakers QF1, QF2, and QF3 collects the first circuit state and transmits it to the corresponding MODBUS switch communication subunit using the MODBUS protocol. The three MODBUS switch communication subunits transmit to the COMXBOX communication subunit in RS485 mode, and the COMXBOX communication subunit implements the storage and protocol conversion of the first circuit state. The COMXBOX communication subunit transmits the first circuit state of the three circuit breakers QF1, QF2, and QF3 to the dual-channel carrier subunit. Finally, the dual-channel carrier subunit converts the first circuit state of the three circuit breakers QF1, QF2, and QF3 into a communication protocol in the format of Q / GDW376-2012, and uploads it to the monitoring device via two power lines. The monitoring center parses and compares the first circuit state of the circuit breaker received via the two power lines, and retains the one with current for background display.

[0045] The temperature collector of the automatic switch collects the temperature signal and transmits it to the dual-channel carrier subunit via RS485 communication. The door status signal is collected by the switch unit and transmitted to the dual-channel carrier subunit via RS485 communication. The dual-channel carrier subunit converts the box temperature and door status information into the communication protocol in the Q / GDW376-2012 format and uploads it to the monitoring device via two power lines. The monitoring device parses and compares the box temperature and door status information received via the two power lines. The circuit breaker status is the circuit that is turned on and its circuit status is retained and displayed in the background.

[0046] An exemplary embodiment of the present invention provides a power switching system, see Figure 7 The power switching system includes the automatic switching switch as in the above embodiment, and a monitoring device 6, the monitoring device 6 is communicatively connected with the automatic switching switch, and the monitoring device 6 is used to receive the circuit status sent by the automatic switching switch.

[0047] The monitoring center can display the received first circuit status, temperature, humidity, etc., so that the administrator can obtain the circuit status in time; in addition, the monitoring center can also interact with the administrator to collect the second user instructions and control the on and off of the corresponding circuit breaker.

[0048] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An automatic switching switch, characterized in that: The automatic transfer switch comprises at least two circuit breakers, a control unit and a communication unit; The input end of each of the at least two circuit breakers is electrically connected to a corresponding power source, and the output end of each of the at least two circuit breakers is electrically connected to a corresponding load; Each circuit breaker comprises a monitoring subunit and an operating subunit, wherein the monitoring subunit is used to detect a first circuit state of each circuit breaker, and the operating subunit is used to operate the on and off of each circuit breaker; The control unit is electrically connected to the monitoring subunit and the operating subunit of each circuit breaker, and the control unit is used to send a first control instruction to the operating subunit of each circuit breaker according to the first circuit state of each circuit breaker, and the first control instruction is used to control the operating subunit to operate; The communication unit is connected to the monitoring subunit of each circuit breaker, and the communication unit is in communication connection with a monitoring device. The communication unit is used to send the first circuit state of each circuit breaker to the monitoring device.

2. The automatic transfer switch according to claim 1, characterized in that: At least one of the at least two circuit breakers is an electronic trip circuit breaker.

3. The automatic transfer switch according to claim 1, characterized in that: The communication unit further comprises a communication subunit and a dual-channel carrier subunit, wherein the communication subunit is electrically connected to the dual-channel carrier subunit; The communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and the communication subunit is used to receive the first circuit state of each circuit breaker; The dual-channel carrier subunit is electrically connected to the monitoring device, and the dual-channel carrier subunit is used to convert the received first circuit state into a second circuit state, where the second circuit state is a circuit state in a first preset format.

4. The automatic transfer switch according to claim 3, characterized in that: The first preset format includes Q / GDW376-2012 format.

5. The automatic transfer switch according to claim 3, characterized in that: The communication subunit comprises a first communication subunit and a second communication subunit, wherein the first communication subunit is electrically connected to the second communication subunit; The first communication subunit is electrically connected to the monitoring subunit of each circuit breaker, and the first communication subunit is used to receive the first circuit state of each circuit breaker; The second communication subunit is electrically connected to the dual-channel carrier subunit, and the second communication subunit is used to send the first circuit state to the dual-channel carrier subunit.

6. The automatic transfer switch according to claim 5, characterized in that: The first communication subunit and the detection subunit use the MODBUS protocol for transmission; And / or, the first communication subunit and the second communication subunit use RS485 for transmission.

7. The automatic transfer switch according to claim 1, characterized in that: The communication unit is also electrically connected to the operation subunit; The communication unit is further used to receive a second control instruction sent by the monitoring device, and send the second control instruction to a corresponding circuit breaker among the at least two circuit breakers, wherein the second control instruction is used to control the operation subunit to perform an operation.

8. The automatic transfer switch according to claim 1, characterized in that: The automatic switching switch further comprises a temperature sensor, and the temperature sensor is used to detect the temperature of the automatic switching switch; The temperature sensor is electrically connected to the communication unit, and the communication unit is used to receive the temperature and send the temperature to the monitoring device.

9. The automatic transfer switch according to claim 8, characterized in that: The temperature sensor and the communication unit are transmitted via RS485.

10. A power switching system, characterized in that: The power switching system comprises an automatic switching switch as described in any one of claims 1 to 9, and a monitoring device, wherein the monitoring device is communicatively connected to the automatic switching switch, and the monitoring device is used to receive a circuit status sent by the automatic switching switch.

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