CN113725997A - Safety switching circuit, method and device - Google Patents
Safety switching circuit, method and device Download PDFInfo
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- CN113725997A CN113725997A CN202110994701.1A CN202110994701A CN113725997A CN 113725997 A CN113725997 A CN 113725997A CN 202110994701 A CN202110994701 A CN 202110994701A CN 113725997 A CN113725997 A CN 113725997A
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000007704 transition Effects 0.000 claims abstract description 90
- 238000004146 energy storage Methods 0.000 claims abstract description 67
- 230000000737 periodic effect Effects 0.000 claims abstract description 37
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000819 phase cycle Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The invention provides a safety switching circuit, a method and a device, wherein the circuit comprises: the power supply circuit comprises a first power supply circuit, a second power supply circuit and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load; the transition circuit comprises a flywheel energy storage device and a third switch; the third switch is respectively connected with the flywheel energy storage device and the target load; the flywheel energy storage equipment is internally provided with a controller, and the controller is used for acquiring power supply periodic signals of the first power supply and the second power supply; the controller is also used for controlling the transition circuit to supply power to the target load when the target load performs power supply circuit switching; the controller is also used for controlling the power supply circuit to be switched to supply power to the target load after the power supply phases are the same according to the power supply period signal of the power supply source to be switched. The embodiment of the invention aims to provide a safe switching circuit, a method and a device, which are used for relieving current impact on electric equipment at the moment of switching and improving the safety of switching operation.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a safety switching circuit, a method and a device.
Background
In recent years, most industrial power supplies are provided with more than two power supply sets, switching operation is often required between two power supplies in the process of equipment maintenance or transformer maintenance, the conventional method is that an operator stops the original power supply firstly, at the moment, the electric equipment loses power instantly, then the electric equipment is connected into a new power supply, and after the reliable connection is confirmed, the electric equipment is powered on.
The conventional switching operation described above has a series of disadvantages. On one hand, when the electric equipment loses power instantly or when the phase sequence of the power supply of the electric equipment is different after the power supply of the electric equipment is switched instantly, current impact can be caused to the electric equipment, so that the electric equipment and a transformer in a power supply line are damaged; on the other hand, the traditional switching operation needs manual operation of an operator to be completed, and potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a safety switching circuit, a method and a device, which are used for relieving current impact on electric equipment at the moment of switching and improving the safety of switching operation.
In a first aspect, an embodiment of the present invention provides a safety switching circuit, including a first power supply circuit, a second power supply circuit, and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load; the first power supply circuit comprises a first power supply and a first switch; the first switch is respectively connected with the first power supply and the target load; the second power supply circuit comprises a second power supply and a second switch; the second switch is respectively connected with the second power supply and the target load; the transition circuit comprises a flywheel energy storage device and a third switch; the third switch is respectively connected with the flywheel energy storage device and the target load; the flywheel energy storage device is internally provided with a controller, and the controller is used for acquiring power supply periodic signals of the first power supply and the second power supply; the controller is also used for controlling the current power supply circuit of the target load to be disconnected and controlling the transition circuit to supply power to the target load when the power supply circuit of the target load is switched off; the controller is also used for controlling the power supply circuit to be switched on after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the target load so as to supply power to the target load and switch off the transition circuit.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where the second power supply circuit is further connected to a second load; the transition circuit also comprises a fourth switch which is respectively connected with the second load and the flywheel energy storage device; the controller is also used for controlling the current power supply circuit of the second load to be disconnected and controlling the transition circuit to supply power to the second load when the power supply circuit of the second load is switched off; the controller is further used for controlling the power supply circuit to be switched on after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the second load, so that power is supplied to the second load, and the transition circuit is switched off.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the flywheel energy storage device includes a plurality of flywheel energy storage units connected in parallel, and each of the plurality of flywheel energy storage units is connected to the controller.
With reference to the first aspect to the third possible implementation manner of the first aspect, an embodiment of the present invention provides the third possible implementation manner of the first aspect, wherein the third switch is a dual power supply changeover switch; the first switch and the second switch are both circuit skip switches.
In a second aspect, an embodiment of the present invention provides a safety switching method, which is applied to the safety switching circuit described in any one of the first aspect to the third possible implementation manners of the first aspect, and the method includes: if a switching indication signal aiming at the target load is received, controlling a current power supply circuit of the target load to be disconnected, and simultaneously controlling the transition circuit to supply power to the target load; and monitoring a power supply period signal of a power supply source to be switched of the target load, switching on the power supply circuit to be switched to supply power to the target load and switching off the transition circuit when the phase of the power supply period signal is monitored to be synchronous with the power supply phase of the transition circuit.
With reference to the second aspect, an embodiment of the present invention provides a first possible implementation manner of the second aspect, where if a switching indication signal for the target load is received, the step of controlling the current power supply circuit to be turned off and controlling the transition circuit to supply power to the target load includes: if the current power supply circuit is the first power supply circuit, when a switching indication signal aiming at the target load is received, the first switch is controlled to be switched off, and the third switch is controlled to be switched on, so that the target load is supplied with power through the flywheel energy storage device; if the current power supply circuit is the second power supply circuit, when a switching indication signal aiming at the target load is received, the second switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device.
With reference to the second aspect, an embodiment of the present invention provides a second possible implementation manner of the second aspect, where before the step of controlling the current power supply circuit to be disconnected, the method further includes: and controlling the third switch to be closed so as to charge the flywheel energy storage equipment through the current power supply circuit until the electric quantity of the flywheel energy storage equipment reaches a preset electric quantity threshold value or the charging time reaches a preset time threshold value.
With reference to the second aspect, an embodiment of the present invention provides a third possible implementation manner of the second aspect, where the method further includes: if a switching indication signal aiming at the second load is received, controlling a current power supply circuit of the second load to be disconnected, and simultaneously controlling the transition circuit to supply power to the second load; and monitoring a power supply periodic signal of a power supply source to be switched of the second load, switching on the power supply circuit to be switched to supply power to the second load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
In a third aspect, an embodiment of the present invention provides a safety switching device, where the safety switching device includes: the control module is used for controlling the current power supply circuit of the target load to be disconnected and simultaneously controlling the transition circuit to supply power to the target load if a switching indication signal aiming at the target load is received; and the monitoring module is used for monitoring a power supply periodic signal of the power supply source to be switched of the target load, switching on the power supply circuit to be switched to supply power to the target load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
In a fourth aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the security switching method according to any one of the second to third possible implementation manners of the second aspect.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a safety switching circuit, a method and a device, wherein the circuit comprises: the power supply circuit comprises a first power supply circuit, a second power supply circuit and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load; the transition circuit comprises a flywheel energy storage device and a third switch; the third switch is respectively connected with the flywheel energy storage device and the target load; the flywheel energy storage equipment is internally provided with a controller, and the controller is used for acquiring power supply periodic signals of the first power supply and the second power supply; the controller is also used for controlling the current power supply circuit to be switched off when the target load performs power supply circuit switching, and simultaneously controlling the transition circuit to supply power to the target load; the controller is also used for controlling the power supply circuit to be switched to supply power to the target load after the power supply phase is the same according to the power supply period signal of the power supply source to be switched, and simultaneously switching off the transition circuit. The circuit supplies power to a target load through the flywheel energy storage device in the switching process, and controls the power supply circuit to be switched after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the target load, so that the current impact on the electric equipment at the moment of switching is relieved, and the safety of switching operation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a safety switching circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another safety switching circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third safety switching circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a safety switching device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon: 11-a first power supply; 111-a first switch; 12-a second power supply; 121-a second switch; 13-flywheel energy storage devices; 131-a third switch; 132-a fourth switch; 133-a fifth switch; 134 a sixth switch; 135-a seventh switch; 14-target load; 15-a second load; 41-a control module; 42-a monitoring module; 51-a memory; 52-a processor; 53-bus; 54-communication interface.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The conventional switching operation has a series of disadvantages. On one hand, when the electric equipment loses power instantly or when the phase sequence of the power supply of the electric equipment is different after the power supply of the electric equipment is switched instantly, current impact can be caused to the electric equipment, so that the electric equipment and a transformer in a power supply line are damaged; on the other hand, the traditional switching operation needs manual operation of an operator to be completed, and potential safety hazards exist.
Accordingly, embodiments of the present invention provide a safety switching circuit, method and device, which can alleviate the above technical problems, alleviate the current impact on the electrical equipment at the moment of switching, and improve the safety of switching operation. For the convenience of understanding the embodiment, a detailed description will be given to a safety switching method disclosed in the embodiment of the present invention.
Example 1
As shown in fig. 1, a schematic diagram of a safety switching circuit according to an embodiment of the present invention is provided, and as shown in fig. 1, the safety switching circuit includes a first power supply circuit, a second power supply circuit, and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load; the first power supply circuit includes a first power supply 11 and a first switch 111; the first switch 111 is connected to the first power source 11 and the target load 14, respectively; the second power supply circuit includes a second power supply 12 and a second switch 121; the second switch 121 is connected to the second power source 12 and the target load 14, respectively; the transition circuit comprises the flywheel energy storage device 13 and a third switch 131; the third switch 131 is respectively connected to the flywheel energy storage device 13 and the target load 14; a controller is arranged in the flywheel energy storage device 13, and is used for acquiring power supply periodic signals of the first power supply 11 and the second power supply 12; the controller is further configured to control a current power supply circuit of the target load 14 to be disconnected and control the transition circuit to supply power to the target load 14 when the target load 14 performs power supply circuit switching; the controller is further configured to control the to-be-switched power supply circuit to be turned on after the phase of the to-be-switched power supply periodic signal coincides with the power supply phase of the transition circuit according to the to-be-switched power supply periodic signal of the target load 14, so as to supply power to the target load 14, and turn off the transition circuit.
On the basis of fig. 1, fig. 2 is a schematic diagram of another safety switching circuit according to an embodiment of the present invention, and as shown in fig. 2, the safety switching circuit further includes: the second supply circuit is also connected to a second load 15; the transition circuit further comprises a fourth switch 132, and the fourth switch 132 is respectively connected to the second load 15 and the flywheel energy storage device 13; the controller is further configured to control a current power supply circuit of the second load 15 to be disconnected and control the transition circuit to supply power to the second load 15 when the second load 15 performs power supply circuit switching; the controller is further configured to control the power supply circuit to be switched to be turned on after the phase of the power supply period signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply period signal of the power supply source to be switched of the second load 15, so as to supply power to the second load 15, and turn off the transition circuit.
In one embodiment, the flywheel energy storage device includes a plurality of flywheel energy storage units connected in parallel, and the plurality of flywheel energy storage units are all connected with the controller. The flywheel energy storage unit can be a mechanical flywheel energy storage unit or a magnetic suspension flywheel energy storage unit.
In another embodiment, the third switch is a dual power transfer switch; the first switch and the second switch are both circuit skip switches.
For convenience of understanding, fig. 3 is a schematic diagram of a third safety switching circuit according to an embodiment of the present invention, and as shown in fig. 3, the safety switching circuit further includes a fifth switch 133, a sixth switch 134, and a seventh switch 135. The fifth switch 133 is connected to the first power supply circuit and the third switch 131 respectively; the sixth switch 134 is connected to the second power supply circuit and the fourth switch 132, respectively; the seventh switch 135 is connected to the first power supply circuit and the second power supply circuit, respectively.
The flywheel energy storage device is provided with a controller, and the controller is used for acquiring power supply periodic signals of a first power supply connected with an external transformer T1 and a second power supply connected with an external transformer T2; the controller is further configured to control a current power supply circuit of the target load 14 to be disconnected and control the transition circuit to supply power to the target load 14 when the target load 14 performs power supply circuit switching; the controller is further configured to control the to-be-switched power supply circuit to be switched on after the phase of the power supply cycle signal of the to-be-switched power supply is the same as the power supply phase of the transition circuit according to the power supply cycle signal of the to-be-switched power supply of the target load 14, so as to supply power to the target load 14, and simultaneously turn off the transition circuit; the second supply circuit is also connected to a second load 15; the fourth switch 132 is connected to the second load 15 and the flywheel energy storage device, respectively; the controller is further configured to control a current power supply circuit of the second load 15 to be disconnected and control the transition circuit to supply power to the second load 15 when the second load 15 performs power supply circuit switching; the controller is further configured to control the power supply circuit to be switched to be turned on after the phase of the power supply period signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply period signal of the power supply source to be switched of the second load 15, so as to supply power to the second load 15, and turn off the transition circuit.
The safety switching circuit provided by the embodiment of the invention comprises: the power supply circuit comprises a first power supply circuit, a second power supply circuit and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load; the transition circuit comprises a flywheel energy storage device and a third switch; the third switch is respectively connected with the flywheel energy storage device and the target load; the flywheel energy storage equipment is internally provided with a controller, and the controller is used for acquiring power supply periodic signals of the first power supply and the second power supply; the controller is also used for controlling the current power supply circuit to be switched off when the target load performs power supply circuit switching, and simultaneously controlling the transition circuit to supply power to the target load; the controller is also used for controlling the power supply circuit to be switched to supply power to the target load after the power supply phase is the same according to the power supply period signal of the power supply source to be switched, and simultaneously switching off the transition circuit. The circuit supplies power to a target load through the flywheel energy storage device in the switching process, and controls the power supply circuit to be switched after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the target load, so that the current impact on the electric equipment at the moment of switching is relieved, and the safety of switching operation is improved.
Example 2
The embodiment provides a safety switching method, which is applied to the safety switching circuit in embodiment 1, and the method includes:
firstly, if a switching indication signal aiming at the target load is received, the current power supply circuit of the target load is controlled to be disconnected, and meanwhile, the transition circuit is controlled to supply power to the target load.
In one embodiment, before the step of controlling the current power supply circuit to be disconnected, the method further comprises: and controlling the third switch to be closed so as to charge the flywheel energy storage equipment through the current power supply circuit until the electric quantity of the flywheel energy storage equipment reaches a preset electric quantity threshold value or the charging time reaches a preset time threshold value.
Here, if the current power supply circuit is the first power supply circuit, when a switching indication signal for the target load is received, the first switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device; if the current power supply circuit is the second power supply circuit, when a switching indication signal aiming at the target load is received, the second switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device.
And then, monitoring a power supply period signal of a power supply source to be switched of the target load, and when the phase of the power supply period signal is monitored to be synchronous with the power supply phase of the transition circuit, switching on the power supply circuit to be switched to supply power to the target load, and switching off the transition circuit.
In this embodiment, taking the third safety switching circuit shown in fig. 3 as a practical application case of the method, if the current power supply circuit is the first power supply circuit, when a switching indication signal for the target load is received, the first switch 111 is controlled to be opened, and the third switch 131 and the fifth switch 133 are controlled to be closed, so as to supply power to the target load 14 through the flywheel energy storage device; if the current power supply circuit is the second power supply circuit, when a switching indication signal for the target load 14 is received, the second switch 121 is controlled to be opened, and the third switch 131 and the fifth switch 133 are controlled to be closed, so as to supply power to the target load through the flywheel energy storage device. And monitoring a power supply period signal of a second power supply circuit of the target load, and closing a seventh switch 135 to switch on the second power supply circuit to supply power to the second load and simultaneously switch off the transition circuit when the phase of the power supply period signal is monitored to be synchronous with the phase of the power supply of the flywheel energy storage device.
In practical operation, the safety switching method further includes:
and if a switching indication signal aiming at the second load is received, controlling the current power supply circuit of the second load to be disconnected, and simultaneously controlling the transition circuit to supply power to the second load.
In one embodiment, before the step of controlling the current power supply circuit to be disconnected, the method further comprises: and controlling the third switch to be closed so as to charge the flywheel energy storage equipment through the current power supply circuit of the second load until the electric quantity of the flywheel energy storage equipment reaches a preset electric quantity threshold value or the charging time reaches a preset time threshold value.
If the current power supply circuit is the second power supply circuit, when a switching indication signal aiming at the target load is received, the second switch is controlled to be opened, and the third switch is controlled to be closed, so that the second load is supplied with power through the flywheel energy storage device; if the current power supply circuit is the first power supply circuit, when a switching indication signal aiming at the second load is received, the first switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device.
And monitoring a power supply periodic signal of a power supply source to be switched of the second load, switching on the power supply circuit to be switched to supply power to the second load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
In this embodiment, taking the third safety switching circuit shown in fig. 3 as a practical application case of the method, if the current power supply circuit is the second power supply circuit, when a switching indication signal for the second load 15 is received, the second switch 121 is controlled to be opened, and the fourth switch 132 and the sixth switch 134 are controlled to be closed, so as to supply power to the second load 15 through the flywheel energy storage device; if the current power supply circuit is the second power supply circuit, when a switching indication signal for the second load 15 is received, the second switch 121 is controlled to be opened, and the fourth switch 132 and the sixth switch 134 are controlled to be closed, so as to supply power to the target load through the flywheel energy storage device. The supply cycle signal of the first power supply of the first supply circuit of the second load is monitored, and when it is monitored that the phase of the supply cycle signal is in synchronization with the supply phase of the flywheel energy storage device, the seventh switch 135 is closed to switch on the first supply circuit to supply power to the second load, while the transition circuit is opened.
The safety switching method provided by the embodiment of the invention comprises the following steps: if a switching indication signal aiming at the target load is received, controlling a current power supply circuit of the target load to be disconnected, and simultaneously controlling the transition circuit to supply power to the target load; and monitoring a power supply period signal of a power supply source to be switched of the target load, switching on the power supply circuit to be switched to supply power to the target load and switching off the transition circuit when the phase of the power supply period signal is monitored to be synchronous with the power supply phase of the transition circuit. The method comprises the steps of supplying power to a target load through flywheel energy storage equipment in the switching process, controlling a power supply circuit to be switched after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of a transition circuit according to the power supply periodic signal of the power supply source to be switched of the target load, and accordingly relieving current impact on electric equipment at the moment of switching and improving the safety of switching operation.
Example 3
An embodiment of the present invention further provides a safety switching device, as shown in fig. 4, which is a schematic diagram of the safety switching device provided in the embodiment of the present invention, and the safety switching device includes:
the control module 41 is configured to, if a switching indication signal for the target load is received, control a current power supply circuit of the target load to be disconnected, and control the transition circuit to supply power to the target load;
and the monitoring module 42 is configured to monitor a power supply cycle signal of the power supply to be switched of the target load, and when it is monitored that the phase of the power supply cycle signal is the same as the power supply phase of the transition circuit, switch on the power supply circuit to be switched to supply power to the target load, and switch off the transition circuit.
The control module 41 is coupled to the monitoring module 42.
In one possible embodiment, the control module 41 is further configured to, if the current power supply circuit is the first power supply circuit, control the first switch to be opened and control the third switch to be closed when a switching indication signal for the target load is received, so as to supply power to the target load through the flywheel energy storage device; if the current power supply circuit is the second power supply circuit, when a switching indication signal aiming at the target load is received, the second switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device.
In one possible embodiment, the control module 41 is further configured to control the third switch to close, so as to charge the flywheel energy storage device through the current power supply circuit until the electric quantity of the flywheel energy storage device reaches the preset electric quantity threshold or the charging time reaches the preset time threshold.
In one possible embodiment, the control module 41 is further configured to control the current power supply circuit of the second load to be disconnected and control the transition circuit to supply power to the second load if a switching indication signal for the second load is received; and monitoring a power supply periodic signal of a power supply source to be switched of the second load, switching on the power supply circuit to be switched to supply power to the second load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
In one possible embodiment, the control module 41 is further configured to, if the current power supply circuit is the second power supply circuit, control the second switch to be opened and control the third switch to be closed when a switching indication signal for the second load is received, so as to supply power to the second load through the flywheel energy storage device; if the current power supply circuit is the first power supply circuit, when a switching indication signal aiming at the second load is received, the first switch is controlled to be opened, and the third switch is controlled to be closed, so that the target load is supplied with power through the flywheel energy storage device.
The safety switching device provided by the embodiment of the invention has the same technical characteristics as the safety switching method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Example 4
The present embodiment provides an electronic device comprising a processor and a memory, the memory storing computer-executable instructions capable of being executed by the processor, the processor executing the computer-executable instructions to implement the steps of the secure switching method.
The present embodiment provides a computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the security switching method.
Referring to fig. 5, a schematic structural diagram of an electronic device is shown, where the electronic device includes: the memory 51 and the processor 52, wherein the memory 51 stores a computer program capable of running on the processor 52, and the processor implements the steps provided by the above-mentioned safety switching method when executing the computer program.
As shown in fig. 5, the apparatus further includes: a bus 53 and a communication interface 54, the processor 52, the communication interface 54 and the memory 51 being connected by the bus 53; the processor 52 is for executing executable modules, e.g. computer programs, stored in the memory 51.
The Memory 51 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 54 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used.
The bus 53 may be an ISA bus, a PCI bus, an EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 5, but this does not indicate only one bus or one type of bus.
The memory 51 is used for storing a program, and the processor 52 executes the program after receiving an execution instruction, and the method executed by the safety switching device according to any of the embodiments of the present invention may be applied to the processor 52, or implemented by the processor 52. Processor 52 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 52. The Processor 52 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 51, and the processor 52 reads the information in the memory 51 and completes the steps of the method in combination with the hardware thereof.
Further, embodiments of the present invention also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by processor 52, cause processor 52 to implement the above-described security switching method.
The electronic device and the computer-readable storage medium provided by the embodiment of the invention have the same technical characteristics, so the same technical problems can be solved, and the same technical effects can be achieved.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Claims (10)
1. A safety switching circuit is characterized by comprising a first power supply circuit, a second power supply circuit and a transition circuit; the first power supply circuit, the second power supply circuit and the transition circuit are all connected with a target load;
the first power supply circuit comprises a first power supply and a first switch; the first switch is respectively connected with the first power supply and the target load;
the second power supply circuit comprises a second power supply and a second switch; the second switch is respectively connected with the second power supply and the target load;
the transition circuit comprises a flywheel energy storage device and a third switch; the third switch is respectively connected with the flywheel energy storage device and the target load;
the flywheel energy storage device is internally provided with a controller, and the controller is used for acquiring power supply periodic signals of the first power supply and the second power supply; the controller is further configured to control a current power supply circuit of the target load to be disconnected and control the transition circuit to supply power to the target load when the target load performs power supply circuit switching; the controller is further used for controlling the power supply circuit to be switched on after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the target load, so that power is supplied to the target load, and the transition circuit is switched off.
2. The safety switching circuit according to claim 1, wherein the second power supply circuit is further connected to a second load;
the transition circuit further comprises a fourth switch, and the fourth switch is respectively connected with the second load and the flywheel energy storage device;
the controller is further configured to control a current power supply circuit of the second load to be disconnected and control the transition circuit to supply power to the second load when the power supply circuit of the second load is switched off; the controller is further used for controlling the power supply circuit to be switched on after the phase of the power supply periodic signal of the power supply source to be switched is the same as the power supply phase of the transition circuit according to the power supply periodic signal of the power supply source to be switched of the second load, so that power is supplied to the second load, and the transition circuit is switched off at the same time.
3. The safety switching circuit according to claim 1, wherein the flywheel energy storage device comprises a plurality of flywheel energy storage units connected in parallel, and the plurality of flywheel energy storage units are all connected with the controller.
4. The safety switching circuit according to any one of claims 1 to 3, wherein the third switch is a dual power supply changeover switch; the first switch and the second switch are both circuit skip switches.
5. A safety switching method applied to the safety switching circuit of any one of claims 1 to 4, the method comprising:
if a switching indication signal aiming at the target load is received, controlling a current power supply circuit of the target load to be disconnected, and simultaneously controlling the transition circuit to supply power to the target load;
and monitoring a power supply periodic signal of a power supply source to be switched of the target load, switching on the power supply circuit to be switched to supply power to the target load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
6. The safety switching method according to claim 5, wherein the step of controlling the current power supply circuit to be turned off and simultaneously controlling the transition circuit to supply power to the target load if the switching indication signal for the target load is received comprises:
if the current power supply circuit is the first power supply circuit, when a switching indication signal aiming at the target load is received, the first switch is controlled to be switched off, and the third switch is controlled to be switched on, so that the target load is supplied with power through the flywheel energy storage device;
and if the current power supply circuit is the second power supply circuit, when a switching indication signal aiming at the target load is received, the second switch is controlled to be switched off, and the third switch is controlled to be switched on, so that the target load is supplied with power through the flywheel energy storage device.
7. The safety switching method according to claim 5, wherein before the step of controlling the current supply circuit to be opened, the method further comprises:
and controlling the third switch to be closed so as to charge the flywheel energy storage equipment through the current power supply circuit until the electric quantity of the flywheel energy storage equipment reaches a preset electric quantity threshold value or the charging time reaches a preset time threshold value.
8. The safety switching method according to claim 5, further comprising:
if a switching indication signal aiming at a second load is received, controlling a current power supply circuit of the second load to be disconnected, and simultaneously controlling the transition circuit to supply power to the second load;
and monitoring a power supply periodic signal of a power supply source to be switched of the second load, and when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit, switching on the power supply circuit to be switched to supply power to the second load, and switching off the transition circuit.
9. A safety switching device, characterized in that said device comprises:
the control module is used for controlling a current power supply circuit of a target load to be disconnected and simultaneously controlling a transition circuit to supply power to the target load if a switching indication signal aiming at the target load is received;
and the monitoring module is used for monitoring a power supply periodic signal of a power supply source to be switched of the target load, switching on the power supply circuit to be switched to supply power to the target load and switching off the transition circuit when the phase of the power supply periodic signal is monitored to be synchronous with the power supply phase of the transition circuit.
10. An electronic device, comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the secure switching method of any one of claims 5 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110994701.1A CN113725997A (en) | 2021-08-27 | 2021-08-27 | Safety switching circuit, method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110994701.1A CN113725997A (en) | 2021-08-27 | 2021-08-27 | Safety switching circuit, method and device |
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| CN113725997A true CN113725997A (en) | 2021-11-30 |
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| JP2003235160A (en) * | 2002-02-04 | 2003-08-22 | Toshiba Corp | System switching device |
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