CN115940381A - Power supply switching method and device, nonvolatile storage medium and electronic equipment - Google Patents

Abstract

The invention discloses a power supply switching method and device, a nonvolatile storage medium and electronic equipment. Wherein, the method comprises the following steps: determining a first power supply for supplying power to a target load and the power quality of the first power supply in a plurality of candidate power supplies; under the condition that the power quality of the first power supply does not meet the preset power quality condition, the first power supply is controlled to be disconnected from the target load, and meanwhile, the energy storage equipment is adopted to supply power to the target load; detecting the power quality corresponding to the candidate power sources respectively, and determining whether a second power source with the power quality meeting a preset power quality condition exists in the candidate power sources; and under the condition that a second power supply exists in the candidate power supplies, the connection between the energy storage equipment and the target load is controlled to be disconnected, and meanwhile, the second power supply is adopted to supply power to the target load. The invention solves the technical problems of unsatisfactory power supply reliability and low power supply quality of the to-be-loaded power supply caused by power quality fluctuation and frequent power failure switching in the related technology.

Description

Power supply switching method and device, nonvolatile storage medium and electronic equipment

Technical Field

The invention relates to the field of power systems, in particular to a power supply switching method and device, a nonvolatile storage medium and electronic equipment.

Background

Some sensitive loads in the power system have higher requirements on the power quality, and when power quality events such as voltage sag and the like occur, the normal work of the sensitive loads cannot be guaranteed. When the power supply switching method is adopted to ensure the power quality, the power is cut off frequently, because the detection and the action need certain time. Before the quick change-over switch is successfully operated, the power supply of the sensitive load cannot be guaranteed. In the related art, the condition that the normal power supply of the sensitive load is influenced in the power supply switching process exists, so that the quality of the power supplied to the sensitive load is not ideal, and the problem of frequent power failure is caused.

In view of the above problems, no effective solution has been proposed.

Disclosure of Invention

The embodiment of the invention provides a power supply switching method and device, a nonvolatile storage medium and electronic equipment, which are used for at least solving the technical problems of unsatisfactory power supply reliability and low power supply quality of a to-be-loaded load caused by power quality fluctuation and frequent power failure switching in related technologies.

According to an aspect of an embodiment of the present invention, there is provided a power switching method, including: determining a first power supply for supplying power to a target load and the power quality of the first power supply in a plurality of candidate power supplies; under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and meanwhile, supplying power to the target load by adopting energy storage equipment; detecting the power quality corresponding to the candidate power sources respectively, and determining whether a second power source with the power quality meeting the preset power quality condition exists in the candidate power sources; and under the condition that a second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies, controlling to disconnect the energy storage device from the target load, and simultaneously adopting the second power supply with the electric energy quality meeting the preset electric energy quality condition in the candidate power supplies to supply power to the target load.

According to another aspect of the embodiments of the present invention, there is provided a power switching apparatus including: the device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for determining a first power supply for supplying power for a target load and the power quality of the first power supply in a plurality of candidate power supplies; the first control module is used for controlling to disconnect the first power supply from the target load and simultaneously supplying power to the target load by adopting energy storage equipment under the condition that the power quality of the first power supply does not meet a preset power quality condition; the judging module is used for detecting the electric energy quality corresponding to the candidate power sources respectively and determining whether a second power source with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power sources; and the second control module is used for controlling to disconnect the energy storage equipment from the target load under the condition that a second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies, and meanwhile, the second power supply with the electric energy quality meeting the preset electric energy quality condition in the candidate power supplies is adopted to supply power to the target load.

According to another aspect of the embodiments of the present invention, there is provided a non-volatile storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform any one of the power switching methods.

According to another aspect of the embodiments of the present invention, there is provided an electronic device including: one or more processors and memory storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement any of the power switching methods.

In the embodiment of the invention, a first power supply for supplying power to a target load and the power quality of the first power supply are determined in a plurality of candidate power supplies in a non-power-off switching mode; under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and simultaneously supplying power to the target load by adopting energy storage equipment; detecting the power quality corresponding to the candidate power sources respectively, and determining whether a second power source with the power quality meeting the preset power quality condition exists in the candidate power sources; and under the condition that a second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies, controlling to disconnect the energy storage equipment from the target load, and meanwhile, adopting the second power supply with the electric energy quality meeting the preset electric energy quality condition in the candidate power supplies to supply power to the target load. The purposes of avoiding load power failure and ensuring the power supply quality of the load are achieved, the technical effects of improving the power supply reliability and improving the power quality are achieved, and the technical problems that the power supply reliability of the to-be-loaded is unsatisfactory and the power supply quality is low due to the fact that power quality fluctuation exists and frequent power failure is switched in the related technology are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:

FIG. 1 is a flow chart of an alternative power switching method provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic diagram of an alternative power switching method according to an embodiment of the invention;

FIG. 3 is a schematic block diagram of an alternative power switching method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an alternative power switching apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Some sensitive loads in the power system, such as special loads in hospitals, semiconductor manufacturing plants and government agencies, have high requirements on the power quality, and when a power quality event occurs, such as a voltage sag or the like, the personal safety of related workers and the normal operation of a production line in a special area cannot be guaranteed. When the power supply switching method is adopted to ensure the power quality, the power is cut off frequently, because the detection and the action need certain time. Before the quick change-over switch is successfully operated, the power supply of the sensitive load cannot be guaranteed. In the related art, the condition that the normal power supply of the sensitive load is influenced in the power supply switching process exists, so that the quality of the power supplied to the sensitive load is not ideal, and the problem of frequent power failure is caused.

An Uninterruptible Power Supply (UPS) in the related art is a device that connects a storage battery with a certain capacity to a host and converts a direct current of the battery into an alternating current (ac) commercial power through an inverter. When the mains supply has the power quality problems such as voltage sag or power supply interruption, the uninterrupted power supply of the electric equipment can be ensured. The UPS has the functions of filtering and isolating, and can filter the interference such as instant flash, harmonic wave, voltage noise and the like and provide a pure power supply for a load; the UPS has the functions of voltage stabilization and frequency stabilization, and when the voltage and the frequency of the commercial power change, the UPS provides the power supply of the load to keep the voltage and the frequency stable; the UPS has an uninterrupted power supply function, charges the battery pack to store energy when the mains supply is normal, and continuously supplies power to the load for a period of time to protect the load when the mains supply is suddenly interrupted.

The SSTS (Solid State Transfer Switch) in the related art is a power switching device including a switching unit and a control unit, can quickly complete switching of a load between two power supplies, and is mainly used for uninterruptible power supply. The switching unit of the SSTS is a multi-selection thyristor which is divided into a pure solid state type (anti-parallel thyristor) and a mixed type (anti-parallel thyristor and rapid vacuum circuit breaker).

However, the UPS as an uninterruptible power supply has a complicated design and high cost due to its internal structure including two pairs of thyristors and many mechanical switches, and cannot realize multi-power switching because it is a single power input in application. The SSTS solid-state transfer switch can realize power supply switching, but has no energy storage equipment, and cannot provide energy storage support when the transient power quality problem occurs.

In view of the above, it should be noted that the steps shown in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different than here.

Fig. 1 is a flowchart of a power switching method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:

step S102, a first power supply for supplying power to a target load and the power quality of the first power supply are determined in a plurality of candidate power supplies.

It is understood that there are a plurality of candidate power sources that may supply power to the target load, a first power source that supplies power to the target load is determined among the plurality of candidate power sources, and a power quality of the first power source is determined.

Optionally, the target load is a sensitive load, and if the voltage changes or changes suddenly, the target load cannot work normally or functions down, and the load is called a sensitive load, and the power quality requirement of the target load on power supply is high.

It should be noted that the quality of the power in the power system is called power quality, and the following factors cause waveform deviation in practical application, thereby generating various power quality problems, which at least include: voltage deviation, frequency deviation, voltage fluctuation and flicker, three-phase imbalance, instantaneous or transient overvoltage, waveform distortion, voltage sag and interruption, and influences the normal operation of the sensitive load.

And step S104, under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and meanwhile, adopting energy storage equipment to supply power to the target load.

It can be understood that, in a case that the power quality of the first power supply does not meet the predetermined power quality condition, it is determined that the power quality of the first power supply cannot meet the requirement of the target load, and in order to ensure normal operation of the target load, the connection between the first power supply and the target load is controlled to be disconnected, and in order to avoid power failure to the target load in the switching process, the energy storage device is used to supply power to the target load while the first power supply is disconnected. Through the processing, the energy storage equipment is adopted to support power supply in the switching process, a seamless switching mode is adopted, the first power supply is switched to the energy storage equipment, and the power quality of the energy storage equipment is stable and almost has no interference, so that the power supply quality of a target load is ensured.

In an alternative embodiment, in a case where the target load is connected to the energy storage device through a first switch, and the target load is connected to the first power supply through a second switch, and in a case where the power quality of the first power supply does not satisfy a preset predetermined power quality condition, the controlling disconnecting the first power supply from the target load and the supplying power to the target load with the energy storage device includes: and under the condition that the power quality of the first power supply does not meet the preset power quality condition, controlling to open the second switch, close the first switch at the same time, and supplying power to the target load by adopting the energy storage equipment.

It can be understood that, under the condition that the target load is connected with the energy storage device through the first switch and the target load is connected with the first power supply through the second switch, in order to realize seamless switching from the first power supply to the energy storage device, under the condition that the power quality of the first power supply does not meet the preset power quality condition, the second switch between the target load and the first power supply is controlled to be opened, meanwhile, the first switch between the target load and the energy storage device is closed, and the energy storage device is adopted to supply power to the target load. Through the above processing, the power failure due to the power supply switching is prevented by controlling the opening and closing actions of the first switch and the second switch.

Alternatively, the first switch and the second switch may be various devices, such as: thyristors, relays, triodes, and the like.

Step S106, detecting power qualities corresponding to the candidate power sources, and determining whether a second power source whose power quality satisfies the predetermined power quality condition exists in the candidate power sources.

It can be understood that, a plurality of candidate power sources may all supply power to the target load, and in order to ensure the power supply quality, the power quality corresponding to each of the plurality of candidate power sources is detected, and it is determined whether there is a second power source whose power quality satisfies the predetermined power quality condition in the plurality of candidate power sources.

It should be noted that the second power source may be regarded as a power source with a defined condition in a plurality of candidate power sources, the second power source is regarded as the power source with the power quality meeting the predetermined power quality condition, and the power quality of the plurality of candidate power sources is fluctuated.

And step S108, under the condition that a second power supply with the power quality meeting the preset power quality condition exists in the candidate power supplies, controlling to disconnect the energy storage equipment from the target load, and simultaneously adopting the second power supply with the power quality meeting the preset power quality condition in the candidate power supplies to supply power to the target load.

It can be understood that, under the condition that a second power supply with the power quality meeting the predetermined power quality condition exists in the plurality of candidate power supplies, the second power supply with the power supply for the target load exists in the plurality of candidate power supplies, and since the energy storage device cannot supply energy for a long time, the second power supply with the power quality meeting the predetermined power quality condition needs to be switched to, so as to avoid power failure, the second power supply with the power quality meeting the predetermined power quality condition is adopted to supply power to the target load while the connection between the energy storage device and the target load is disconnected. Through the processing, the energy storage equipment is switched out in time, the working time of the energy storage equipment is prolonged conveniently, seamless switching is adopted, and the situation that the target load is powered off and normal operation is influenced in the switching process is guaranteed.

In an alternative embodiment, in a case where the target load is connected to the energy storage device through a first switch, the target load is connected to a fourth switch through a third switch, and the fourth switch is connected to a second power source whose power quality satisfies the predetermined power quality condition among the plurality of candidate power sources, the controlling disconnects the energy storage device from the target load while supplying power to the target load using the second power source whose power quality satisfies the predetermined power quality condition among the plurality of candidate power sources, includes: controlling to close the fourth switch; and under the condition that a closing feedback signal corresponding to the fourth switch is acquired, controlling to disconnect the first switch and close the third switch at the same time, and supplying power to the target load by adopting a second power supply of which the power quality meets the preset power quality condition in the plurality of candidate power supplies.

It is understood that, in the case where the target load is connected to the energy storage device through the first switch, the target load is connected to the fourth switch through the third switch, and the fourth switch is connected to the second power source whose power quality satisfies the predetermined power quality condition among the plurality of candidate power sources, in order to implement seamless switching from the energy storage device to the second power source, first, the fourth switch is controlled to be closed, and in the case of normal closing, the connection between the target load and the second power source can be connected as long as the third switch is closed after the fourth switch is closed. In order to avoid that a closing feedback signal corresponding to the fourth switch needs to be acquired due to transmission errors of the circuit control signal, under the condition that the closing feedback signal of the fourth switch is acquired, the fourth switch is deemed to be actually closed, then the third switch is closed while the first switch is switched off, at the moment, the energy storage device is switched to a second power supply with the electric energy quality meeting the preset electric energy quality condition in the multiple candidate power supplies, and the second power supply target load with the electric energy quality meeting the preset electric energy quality condition in the multiple candidate power supplies is adopted for power supply.

Optionally, the first switch, the third switch, and the fourth switch may be various devices, for example: thyristors, relays, triodes, etc.

The plurality of candidate power supplies may be connected to the third switch by a device such as a single-pole multi-throw switch, or may be switched by an Automatic Transfer Switching Equipment (ATSE).

In an alternative embodiment, in a case where there are a plurality of second power sources having the power quality satisfying the predetermined power quality condition from among the plurality of candidate power sources, the controlling disconnects the energy storage device from the target load, and the second power sources having the power quality satisfying the predetermined power quality condition from among the plurality of candidate power sources are used to supply power to the target load, including: acquiring the electric energy quality corresponding to each of a plurality of second power supplies of which the electric energy quality meets the preset electric energy quality condition in the plurality of candidate power supplies; determining a target power supply with the highest power quality in a plurality of second power supplies with the power quality meeting the preset power quality condition in the plurality of candidate power supplies; and controlling to disconnect the energy storage equipment from the target load, and simultaneously adopting the target power supply to supply power to the target load.

It is understood that there may exist a plurality of second power sources with power quality satisfying the predetermined power quality condition among the plurality of candidate power sources, and it is necessary to select one power source to supply power to the target load. Firstly, the power qualities corresponding to a plurality of second power supplies with the power qualities meeting the preset power quality condition in a plurality of candidate power supplies are obtained, the target power supply with the highest power quality in the plurality of second power supplies with the power qualities meeting the preset power quality condition in the plurality of candidate power supplies is determined, and the purpose of obtaining the best power supply effect of the target load is achieved through the optimal processing in the plurality of second power supplies. And in order to ensure that the switching process is not powered off, the target load is powered by the target power supply while the connection of the energy storage equipment to the target load is disconnected, so that the aim of seamlessly switching the power supply is fulfilled.

In an optional embodiment, the method further includes: and under the condition that the second power supply with the electric energy quality meeting the preset electric energy quality condition does not exist in the candidate power supplies, the energy storage equipment is adopted to supply power to the target load until the second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies.

It can be understood that, in the process of supporting the target load by using the energy storage device, there is a case that there is no second power supply with an electric energy quality meeting the predetermined electric energy quality condition in the multiple candidate power supplies, that is, the multiple candidate power supplies temporarily cannot meet the power supply requirement of the target load, and it is necessary to continuously use the energy storage device to supply power to the target load until it is determined that there is a second power supply with an electric energy quality meeting the predetermined electric energy quality condition in the multiple candidate power supplies.

In an optional embodiment, after the power supply to the target load is performed by using the energy storage device, the method further includes: judging the running time of the residual electric quantity in the energy storage equipment; determining an emergency power supply with the highest electric energy quality in the plurality of candidate power supplies under the condition that the running time is less than a preset time threshold; and controlling to disconnect the energy storage equipment from the target load, and simultaneously supplying power to the target load by adopting the emergency power supply.

It can be appreciated that since the energy storage device is a storage device for energy and cannot be supplied for a long time, there is a possibility that electric energy in the energy storage device is exhausted. Therefore, after the energy storage device is used for supplying power to the target load, the running time of the residual electric quantity in the energy storage device needs to be judged, and the situation that the power supply is not switched due to sudden exhaustion of the electric quantity to cause power loss of the target load is avoided. And under the condition that the operation time length is less than a preset time length threshold value, the energy storage device is considered to be in a state of being exhausted, and one of the candidate power sources is required to undertake a power supply task. This is because even if there is no second power supply whose power quality satisfies the predetermined power quality condition among the plurality of candidate power supplies, the plurality of candidate power supplies temporarily fail to meet the power quality requirement of the target load, and are superior to the case where the target load is powered off directly due to the power failure of the energy storage device. Therefore, the power source with the highest quality in the candidate power sources is determined as the emergency power source. In order to avoid power failure in the power supply switching process, the emergency power supply is adopted to supply power to the target load while the energy storage device is disconnected from the target load.

In an alternative embodiment, in the case where the energy storage device is a capacitor or an energy storage battery, and the candidate power sources are ac power sources, the energy storage device is connected to the target load through an inverter, and the candidate power sources are connected to the target load through two thyristors or triacs connected in inverse parallel.

It can be understood that, in the case that the energy storage device is a capacitor or an energy storage battery, and the plurality of candidate power sources are ac power sources, it is known that the target load is an ac device, and the capacitor or the energy storage battery directly outputs a dc power and cannot be directly connected to the target load, the energy storage device is connected to the target load through an inverter, and the inverter is used to convert the dc power into an ac power. The candidate power supplies are connected with the target load through two thyristors or bidirectional thyristors in inverse parallel connection, and the two thyristors and the bidirectional thyristors in inverse parallel connection can transmit positive and negative half-waves of the alternating current to the target load.

Through the steps, the purposes of avoiding load power failure and ensuring the power supply quality of the load can be achieved, the technical effects of improving the reliability of power supply and improving the power quality are achieved, and the technical problems that the power supply reliability of the to-be-loaded load is unsatisfactory and the power supply quality is low due to the fact that power quality fluctuation exists and frequent power failure is switched in the related technology are solved.

Based on the foregoing embodiment and optional embodiments, the present invention provides an optional implementation manner, and fig. 2 is a schematic diagram of an optional power supply switching method provided according to an embodiment of the present invention, as shown in fig. 2, there are two candidate power supplies, where a power supply i and a power supply ii are ac power supplies, and a dual power supply manner is adopted to supply power to a target load. The target load is the target load, and power supply switching is carried out according to the power quality waveform of the power supply, so that the target load is ensured not to be powered off or abnormally run. And the target load adopts an automatic switching device to realize the on-off of the power supply I and the power supply II. In the initial state, the power supply I supplies power to the target load, and the power supply II does not supply power, namely, the port 1 and the port 3 are connected and the port 2 and the port 3 are disconnected in the figure 2.

When the power supply I supplies power, the anti-parallel thyristors S4 and S5 alternately conduct alternating current so as to ensure the normal power supply of the target load. When the power quality of the power supply I does not meet the requirement, the automatic switching device detects the voltage of the power supply II, and if the voltage of the power supply II meets the requirement, the automatic switching device is switched to supply power to a target load from the power supply II.

In order to avoid power failure, the controller acquires power quality detection signals of the power supply I and the power supply II, and after the controller receives the detection signals that the power quality of the power supply I does not meet the preset power quality requirement, the trigger signals of the thyristor S4 and the thyristor S5 are locked and turned off. At the same time, switch S7 is signaled to close and the target load will be powered by the energy storage device.

In the process of supplying power by the energy storage equipment, if the power quality of the power supply II is detected to meet the requirement, the automatic switching device is switched to the state that the port 2 is connected with the port 3, and the port 1 and the port 3 are disconnected. And after detecting the signal of successful switching, namely closing the feedback signal, the controller determines to complete the connection of the port 2 and the port 3. And triggering signals to the thyristor S4 and the thyristor S5, and simultaneously disconnecting the switch S7 to supply power to the target load by the power supply II.

And if the power quality of the power supply II and the power supply I does not meet the requirement, the energy storage equipment continuously supplies power to the target load. The energy storage device cannot operate for a long time due to the limited electric quantity.

If the power quality of the power supply I and the power supply II do not meet the requirement, and the residual capacity of the energy storage device is not enough to maintain normal power supply of the target load, a signal is triggered (conducted) to the thyristor S4 and the thyristor S5, the switch S7 is turned off, the energy storage device is withdrawn, and one power supply with better power quality in the power supply I and the power supply II is selected to supply power to the target load.

In order to further improve the reliability of the target load, a bypass switch S6 is arranged, the bypass switch S6 is in a disconnected state when the thyristors S4 and S5 work normally, and after the thyristors S4 or S5 break down, the bypass switch S6 is in short circuit with the thyristors S4 and S5 to replace the thyristors S4 and S5 and is controlled by a controller.

Fig. 3 is a schematic block diagram of an alternative power supply switching method according to an embodiment of the present invention, and as shown in fig. 3, the controller includes a plurality of functional modules, the information acquisition module acquires power qualities of the power supply i and the power supply ii, the determination module determines which power supply has a better power quality, and the switching control module and the thyristor control module execute a controller instruction. The judging module can judge the voltage comparison under the condition that the power quality is the voltage time.

At least the following effects are achieved by the above alternative embodiments: the energy storage device is used for continuing power supply in the switching process of the power supply I and the power supply II, the purposes of avoiding load power failure and guaranteeing the power supply quality of a load are achieved through switch control, the technical effects of improving the power supply reliability and improving the power quality are achieved, and the technical problems that in the related technology, the power quality is fluctuated, frequent power failure in switching, the power supply reliability of a to-be-loaded state is unsatisfactory, and the power supply quality is low are solved.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In this embodiment, a power switching device is further provided, and the power switching device is used to implement the foregoing embodiments and preferred embodiments, and the description of the power switching device is omitted. As used hereinafter, the terms "module" and "apparatus" may refer to a combination of software and/or hardware that performs a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

According to an embodiment of the present invention, there is also provided an embodiment of an apparatus for implementing a power switching method, and fig. 4 is a schematic diagram of a power switching apparatus according to an embodiment of the present invention, as shown in fig. 4, the power switching apparatus includes: a first determination module 402, a first control module 404, a determination module 406, and a second control module 408, which are described below.

A first determining module 402, configured to determine, from among a plurality of candidate power sources, a first power source that supplies power to a target load and a power quality of the first power source;

a first control module 404, connected to the first determining module 402, configured to, when the power quality of the first power supply does not meet a predetermined power quality condition, control to disconnect the first power supply from the target load, and meanwhile, supply power to the target load by using an energy storage device;

a determining module 406, connected to the first control module 404, configured to detect power qualities corresponding to the multiple candidate power sources, and determine whether a second power source whose power quality satisfies the predetermined power quality condition exists in the multiple candidate power sources;

and a second control module 408, connected to the determining module 406, configured to, in a case that there is a second power source with a power quality meeting the predetermined power quality condition in the multiple candidate power sources, control to disconnect the energy storage device from the target load, and simultaneously supply power to the target load by using the second power source with the power quality meeting the predetermined power quality condition in the multiple candidate power sources.

In the power supply switching device provided in the embodiment of the present invention, the first determining module 402 is configured to determine, from a plurality of candidate power supplies, a first power supply that supplies power to a target load and a power quality of the first power supply; a first control module 404, connected to the first determining module 402, configured to control to disconnect the first power source from the target load and supply power to the target load by using an energy storage device when the power quality of the first power source does not meet a predetermined power quality condition; a determining module 406, connected to the first control module 404, configured to detect power qualities corresponding to the multiple candidate power sources, and determine whether a second power source whose power quality satisfies the predetermined power quality condition exists in the multiple candidate power sources; and a second control module 408, connected to the determining module 406, configured to control to disconnect the energy storage device from the target load when there is a second power source with a power quality meeting the predetermined power quality condition from the plurality of candidate power sources, and to supply power to the target load by using the second power source with a power quality meeting the predetermined power quality condition from the plurality of candidate power sources. The purposes of avoiding load power failure and ensuring the power supply quality of the load are achieved, the technical effects of improving the power supply reliability and improving the power quality are achieved, and the technical problems that the power supply reliability of the to-be-loaded is unsatisfactory and the power supply quality is low due to the fact that power quality fluctuation exists and frequent power failure is switched in the related technology are solved.

It should be noted that the above modules may be implemented by software or hardware, for example, for the latter, the following may be implemented: the modules can be located in the same processor; alternatively, the modules may be located in different processors in any combination.

It should be noted that, the first determining module 402, the first controlling module 404, the determining module 406, and the second controlling module 408 correspond to steps S102 to S108 in the embodiment, and the modules and the corresponding steps are implemented in the same example and application scenarios, but are not limited to the disclosure in the embodiment. It should be noted that the modules described above may be executed in a computer terminal as part of an apparatus.

It should be noted that, for alternative or preferred embodiments of the present embodiment, reference may be made to the relevant description in the embodiments, and details are not described herein again.

The power switching apparatus may further include a processor and a memory, wherein the first determining module 402, the first controlling module 404, the determining module 406, the second controlling module 408, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.

The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more cores may be provided. The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.

An embodiment of the present invention provides a nonvolatile storage medium having a program stored thereon, the program implementing a power switching method when executed by a processor.

The embodiment of the invention provides electronic equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps: determining a first power supply for supplying power to a target load and the power quality of the first power supply in a plurality of candidate power supplies; under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and meanwhile, adopting energy storage equipment to supply power to the target load; detecting the power quality corresponding to each of the candidate power sources, and determining whether a second power source with the power quality meeting the preset power quality condition exists in the candidate power sources; and under the condition that a second power supply with the power quality meeting the preset power quality condition exists in the candidate power supplies, controlling to disconnect the energy storage equipment from the target load, and simultaneously adopting the second power supply with the power quality meeting the preset power quality condition in the candidate power supplies to supply power to the target load. The device herein may be a server, a PC, etc.

The invention also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: determining a first power supply for supplying power to a target load and the power quality of the first power supply in a plurality of candidate power supplies; under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and simultaneously supplying power to the target load by adopting energy storage equipment; detecting the power quality corresponding to each of the candidate power sources, and determining whether a second power source with the power quality meeting the preset power quality condition exists in the candidate power sources; and under the condition that a second power supply with the power quality meeting the preset power quality condition exists in the candidate power supplies, controlling to disconnect the energy storage device from the target load, and simultaneously supplying power to the target load by using the second power supply with the power quality meeting the preset power quality condition in the candidate power supplies.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A method of power switching, comprising:

determining a first power supply for supplying power to a target load and the power quality of the first power supply in a plurality of candidate power supplies;

under the condition that the power quality of the first power supply does not meet a preset power quality condition, controlling to disconnect the first power supply from the target load, and simultaneously supplying power to the target load by adopting energy storage equipment;

detecting the power quality corresponding to the candidate power supplies respectively, and determining whether a second power supply with the power quality meeting the preset power quality condition exists in the candidate power supplies;

and under the condition that a second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies, controlling to disconnect the energy storage device from the target load, and simultaneously adopting the second power supply with the electric energy quality meeting the preset electric energy quality condition in the candidate power supplies to supply power to the target load.

2. The method according to claim 1, wherein in a case where the target load is connected to the energy storage device through a first switch and the target load is connected to the first power source through a second switch, and in a case where the power quality of the first power source does not satisfy a preset predetermined power quality condition, controlling to disconnect the first power source from the target load while the target load is powered by the energy storage device, includes:

and under the condition that the power quality of the first power supply does not meet the preset power quality condition, controlling to disconnect the second switch, simultaneously closing the first switch, and supplying power to the target load by adopting the energy storage equipment.

3. The method of claim 1, wherein in the case where the target load is connected to the energy storage device through a first switch, the target load is connected to a fourth switch through a third switch, and the fourth switch is connected to a second power source of the candidate power sources whose power quality satisfies the predetermined power quality condition, the controlling disconnecting the energy storage device from the target load while supplying power to the target load using the second power source of the candidate power sources whose power quality satisfies the predetermined power quality condition comprises:

controlling to close the fourth switch;

and under the condition that a closing feedback signal corresponding to the fourth switch is acquired, controlling to disconnect the first switch, closing the third switch at the same time, and supplying power to the target load by adopting a second power supply of which the power quality meets the preset power quality condition in the plurality of candidate power supplies.

4. The method according to claim 1, wherein in a case where there are a plurality of second power sources of the plurality of candidate power sources whose power quality satisfies the predetermined power quality condition, the controlling disconnects the energy storage device from the target load while supplying power to the target load using the second power sources of the plurality of candidate power sources whose power quality satisfies the predetermined power quality condition includes:

acquiring the electric energy quality corresponding to each of a plurality of second power supplies of which the electric energy quality meets the preset electric energy quality condition in the plurality of candidate power supplies;

determining a target power supply with the highest power quality in a plurality of second power supplies with the power quality meeting the preset power quality condition in the plurality of candidate power supplies;

and controlling to disconnect the connection of the energy storage equipment to the target load, and simultaneously supplying power to the target load by adopting the target power supply.

5. The method of claim 1, further comprising:

and under the condition that the second power supply with the electric energy quality meeting the preset electric energy quality condition does not exist in the candidate power supplies, the energy storage equipment is adopted to supply power to the target load until the second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies.

6. The method of claim 5, wherein after said powering the target load with the energy storage device, the method further comprises:

judging the running time of the residual electric quantity in the energy storage equipment;

determining an emergency power supply with the highest electric energy quality in the candidate power supplies under the condition that the running time is less than a preset time threshold;

and controlling to disconnect the connection between the energy storage equipment and the target load, and meanwhile, supplying power to the target load by adopting the emergency power supply.

7. The method according to any one of claims 1 to 6,

and under the condition that the energy storage equipment is a capacitor or an energy storage battery and the candidate power sources are alternating current power sources, the energy storage equipment is connected with the target load through an inverter, and the candidate power sources are connected with the target load through two thyristors or bidirectional thyristors in inverse parallel.

8. A power switching apparatus, comprising:

the device comprises a first determination module, a second determination module and a control module, wherein the first determination module is used for determining a first power supply for supplying power for a target load and the power quality of the first power supply in a plurality of candidate power supplies;

the first control module is used for controlling to disconnect the first power supply from the target load and simultaneously supplying power to the target load by adopting energy storage equipment under the condition that the power quality of the first power supply does not meet a preset power quality condition;

the judging module is used for detecting the electric energy quality corresponding to the candidate power sources respectively and determining whether a second power source with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power sources;

and the second control module is used for controlling to disconnect the energy storage device from the target load under the condition that a second power supply with the electric energy quality meeting the preset electric energy quality condition exists in the candidate power supplies, and meanwhile, the second power supply with the electric energy quality meeting the preset electric energy quality condition in the candidate power supplies is adopted to supply power to the target load.

9. A non-volatile storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to perform the power supply switching method according to any one of claims 1 to 7.

10. An electronic device, comprising: one or more processors and memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the power switching method of any of claims 1-7.

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