CN115912599A - Dual-power switching device and method - Google Patents
Dual-power switching device and method Download PDFInfo
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- CN115912599A CN115912599A CN202210957377.0A CN202210957377A CN115912599A CN 115912599 A CN115912599 A CN 115912599A CN 202210957377 A CN202210957377 A CN 202210957377A CN 115912599 A CN115912599 A CN 115912599A
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- 238000012544 monitoring process Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 7
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- 230000000670 limiting effect Effects 0.000 description 2
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- 238000004590 computer program Methods 0.000 description 1
- 230000003111 delayed effect Effects 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention provides a double-power switching device and a method, comprising the following steps: the power frequency circuit outputs a power frequency power supply; the UPS circuit outputs a UPS power supply; the control unit is used for switching the power frequency circuit or the UPS circuit to output power supply so as to output the power frequency power supply or the UPS power supply to the transmitter; the control unit is used for controlling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit fails in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit fails; and the control unit is also used for switching to a power frequency circuit to output a power frequency power supply to the transmitter after detecting that the UPS circuit fails. According to the invention, the dual power supplies are carried out through the power frequency circuit and the UPS circuit, and the dual power supplies are switched in real time through judging the fault circuit, so that the power supply can be effectively prevented from being switched in time when the UPS fails or does not meet the power supply requirement, the DCS equipment is prevented from being burnt, and the safety of the equipment is ensured.
Description
Technical Field
The invention relates to the technical field of transmitters, in particular to a dual-power switching device and a dual-power switching method.
Background
At present, a DEH transmitter used for performing active power control on a generator in a power plant is a three-out-of-one algorithm, namely three identical active transmitters calculate a power value, if the power value is incorrect and light, the power fluctuation is caused, and if the power value is heavy, the machine tripping is performed, so that the reliability requirement on the three active transmitters is extremely high, and the current, the voltage and the power supply of the three transmitters are required to be independent respectively.
In the prior art, the power supplies of the three transmitters are independent on the terminal strip of the transmitter cabinet, but the main sources are all from the UPS power supply, if the UPS fails, the three transmitters can be simultaneously affected, and after the UPS power supply fails, part of DCS (Distributed Control System) equipment can be burned.
Therefore, how to switch the power supply in time when the UPS fails or does not meet the power supply requirement, so as to prevent the DCS device from being burnt down due to the failure or the non-satisfaction of the power supply requirement of the UPS, which is a technical problem that needs to be solved urgently.
Disclosure of Invention
In view of this, the invention provides a dual power supply switching device and method, which aims to solve the problem that when a UPS power supply fails or does not meet the power supply requirement, a power supply is switched timely, and DCS equipment is prevented from being burnt down due to the failure of the UPS power supply or does not meet the power supply requirement.
In one aspect, the present invention provides a dual power switching device, including:
the power frequency circuit is used for outputting a power frequency power supply;
a UPS circuit for outputting a UPS power;
the control unit is respectively connected with the power frequency circuit and the UPS circuit, is also connected with the transmitter, and is used for switching the power frequency circuit or the UPS circuit to output power so as to output a power frequency power supply or a UPS power supply to the transmitter; the control unit is used for controlling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit fails in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit fails; the control unit is also used for switching to the power frequency circuit to output power frequency power supply to the transmitter after detecting that the UPS circuit has a fault;
and the switching unit is used for respectively switching the power frequency circuit or the UPS circuit to be communicated with the transmitter.
Further, the control unit comprises a first transformer, and the first transformer is used for detecting the current or voltage of the power frequency circuit; wherein the content of the first and second substances,
and when the power frequency circuit has no current or voltage output, judging that the power frequency circuit has a fault.
Furthermore, a voltage stabilizing module is arranged on the control unit, the power frequency circuit is also used for supplying power to the control unit, and a power frequency power supply output by the power frequency circuit provides a direct current power supply for the control unit after being stabilized by the voltage stabilizing module.
Further, the control unit comprises a second transformer for detecting whether the UPS circuit is faulty;
the control unit is also used for stopping the power output of the UPS circuit after the UPS circuit is detected to be out of order, and switching to the power frequency circuit to supply power to the transmitter.
Further, the control unit includes a UPS detection unit, the UPS detection unit is configured to detect a fault type of the UPS circuit, and the control unit is configured to control a switching speed when switching to the power frequency circuit for power output according to the fault type of the UPS circuit.
Further, the fault types of the UPS circuit include a UPS overvoltage state, a UPS undervoltage state, and a UPS low frequency state;
the control unit is used for switching the power frequency circuit after delaying for 0.3-0.7 seconds when the UPS circuit is in a UPS overvoltage state or a UPS undervoltage state;
and the control unit is used for switching the power frequency circuit after delaying 0.1-0.9 milliseconds when the UPS circuit is in a UPS low-frequency state.
Further, the switching unit includes contactor or relay, contactor or relay are used for when normal operating, through normally closed contact will the UPS power supplies to the changer, work as when the UPS power takes place excessive pressure, under-voltage or low frequency trouble contactor or relay actuation supply the power frequency power to the changer.
On the other hand, the invention also provides a double power supply switching method, which is implemented by adopting the double power supply switching device and comprises the following steps:
respectively arranging a power frequency circuit and a UPS circuit to be connected with the transmitter;
and enabling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit breaks down or not in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit breaks down.
Further, when switching to the UPS circuit for UPS power output to the transmitter, the method includes:
and detecting whether the UPS circuit breaks down or not, and after the UPS circuit breaks down, stopping power output of the UPS circuit and switching to the power frequency circuit to supply power to the transmitter.
Further, when the power frequency circuit breaks down, the UPS circuit is switched to the transmitter to output UPS power, and then alarm information is output to prompt operation and maintenance personnel to maintain the power frequency circuit.
Compared with the prior art, the dual power supply switching device and the dual power supply switching method have the advantages that the power frequency power supply is output through the power frequency circuit, the UPS circuit outputs the UPS power supply, the control unit is respectively connected with the power frequency circuit and the UPS circuit, and the control unit is used for switching the power frequency circuit or the UPS circuit to output the power supply so as to output the power frequency power supply or the UPS power supply to the transmitter; the control unit is used for controlling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit fails in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit fails; and the control unit is also used for switching to the power frequency circuit to output the power frequency power supply to the transmitter after detecting that the UPS circuit fails. According to the invention, the dual power supplies are carried out through the power frequency circuit and the UPS circuit which are arranged, the dual power supplies are switched in real time through the judgment of the fault circuit, so that the power supply can be effectively prevented from being switched in time when the UPS fails or does not meet the power supply requirement, the DCS equipment is prevented from being burnt down due to the failure of the UPS or does not meet the power supply requirement, and the safety of the equipment is ensured. Meanwhile, through fault detection of the power frequency circuit, UPS power supply switching can be performed timely when the power frequency circuit breaks down, so that seamless power supply switching of the whole circuit can be guaranteed, the whole power supply stability is guaranteed, and the guaranteed DCS device can run stably.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a dual power switching device according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a dual power switching device according to an embodiment of the present invention;
FIG. 3 is a diagram of a circuit board structure according to an embodiment of the present invention;
fig. 4 is a first flowchart of a dual power switching method according to an embodiment of the invention;
fig. 5 is a second flowchart of a dual power switching method according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this disclosure belongs.
In addition, the terms "first" and "second", etc. are used to distinguish different objects, and are not used to describe a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
In the prior art, a UPS (Uninterruptible Power Supply) is an Uninterruptible Power Supply including an energy storage device. The power supply is mainly used for providing uninterrupted power supply for partial equipment with higher requirements on the stability of the power supply.
When the mains supply is input normally, the UPS supplies the mains supply to a load for use after stabilizing the voltage of the mains supply, and the UPS is an alternating current type voltage stabilizer and also charges a battery in the machine; when the commercial power is interrupted (power failure in an accident), the UPS immediately supplies 220V alternating current to the load by using the direct current electric energy of the battery through the method of switching and converting the inverter, so that the load keeps normal work and the soft and hardware of the load are protected from being damaged. UPS devices typically provide protection against either excessive voltage or insufficient voltage.
Since the DEH transmitter of the power plant is used for controlling the active power of the generator, the algorithm is a one-out-of-three algorithm. In addition, the power supply sources of the three transmitters are independent on the terminal strip of the transmitter cabinet, but the main source is from a UPS (uninterrupted power supply), if the UPS fails, the three transmitters can be simultaneously influenced, and after the UPS fails, part of DCS (distributed control system) equipment can be burnt, so that the embodiment of the invention provides the double-power-source switching device and the double-power-source switching method, so that the problem that the DCS equipment is burnt due to the fact that the UPS fails or does not meet the power supply requirement when the UPS fails is solved, and the power supply is timely switched.
The embodiment of the invention has the following requirements for the double-power switching device: the power does not need to be large, because the current does not exceed 1A in actual operation;
the switching speed is required to be fast enough but not absolutely fast, undisturbed switching is not required to be realized, but extremely high reliability is required, and even if the switching device per se fails or even burns out, the output cannot be influenced;
the switching conditions are specific to possible fault characteristics of the UPS, so three switching conditions are determined: UPS over-voltage, UPS under-voltage, and UPS low frequency. Other conditions do not cause damage to the transmitter and are therefore not considered.
In the conventional dual power switching device, the dual power switching device on the market does not completely meet the requirements. The two-power switching devices in the market are roughly classified into two types, one is to emphasize high power output, such as switching of hundreds of amperes of current, and the problems of the products are that the functions are few, the switching speed is too slow, and even some of the products have self-delay. The other is a non-interfering switching device, a full electronic circuit, which has the problem of being advanced but not satisfactory in reliability because it is a full electronic component that will cause no output at all if it fails, such as the output power tube burns out. Based on this, the embodiment of the invention provides a dual power switching device and a method.
In some embodiments of the present invention, referring to fig. 1, the present embodiment provides a dual power switching device, including:
the power frequency circuit 200 is used for outputting a power frequency power supply;
a UPS circuit 300 for outputting a UPS power;
a control unit 100, connected to the power frequency circuit 200 and the UPS circuit 300, respectively, wherein the control unit 100 is further connected to the transmitter 500, and the control unit 100 is configured to switch the power frequency circuit 200 or the UPS circuit 300 to output power so as to output a power frequency power or a UPS power to the transmitter 500; the control unit 100 is configured to control the power frequency circuit 200 to continuously output a power frequency power to the transmitter 500, monitor whether the power frequency circuit 200 fails in real time, and switch to the UPS circuit 300 to output a UPS power to the transmitter 500 when the power frequency circuit 200 fails; the control unit 100 is further configured to switch to the power frequency circuit 200 to output a power frequency power supply to the transmitter 500 after detecting that the UPS circuit 300 has a fault;
and a switching unit 400, configured to switch the power frequency circuit 200 or the UPS circuit 300 to communicate with the transmitter 500 respectively.
It can be seen that, in this embodiment, the power frequency circuit 200 outputs a power frequency power, the UPS circuit 300 outputs a UPS power, the control unit 100 is connected to the power frequency circuit 200 and the UPS circuit 300, and the control unit 100 is configured to switch the power frequency circuit 200 or the UPS circuit 300 to output a power frequency power or a UPS power to the transmitter 500; the control unit 100 is configured to control the power frequency circuit 200 to continuously output a power frequency power to the transmitter 500, monitor whether the power frequency circuit 200 fails in real time, and switch to the UPS circuit 300 to output a UPS power to the transmitter 500 when the power frequency circuit 200 fails; the control unit 100 is further configured to switch to the power frequency circuit 200 to output the power frequency power to the transmitter 500 after detecting that the UPS circuit 300 has a fault.
Specifically, the double power supplies are carried out through the power frequency circuit 200 and the UPS circuit 300 which are arranged, the double power supplies are switched in real time through the judgment of the fault circuit, the power supply can be effectively prevented from being switched in time when the UPS fails or cannot meet the power supply requirement, the DCS equipment is prevented from being burnt out due to the fact that the UPS fails or cannot meet the power supply requirement, and the safety of the equipment is ensured. Meanwhile, through fault detection of the power frequency circuit 200, UPS power supply switching can be carried out in time when the power frequency circuit 200 breaks down, so that seamless power supply switching of the whole circuit can be guaranteed, the whole power supply stability is guaranteed, and the guaranteed DCS equipment can run stably.
Specifically, the switching unit 400 is preferably a contactor or a relay.
In some embodiments of the present invention, as shown in fig. 2, the control unit 100 includes a first mutual inductor 201, where the first mutual inductor 201 is configured to detect a current or a voltage of the power frequency circuit 200; wherein the content of the first and second substances is controlled,
and when no current or voltage is output from the power frequency circuit 200, judging that the power frequency circuit 200 has a fault.
Specifically, a voltage stabilizing module is arranged on the control unit 100, the power frequency circuit 200 is further configured to supply power to the control unit 100, and a power frequency power supply output by the power frequency circuit 200 is stabilized by the voltage stabilizing module and then provides a direct current power supply for the control unit 100.
In some embodiments of the present invention, with continued reference to fig. 2, the control unit 100 further comprises a second transformer 301, the second transformer 301 being configured to detect whether a fault occurs in the UPS circuit 300;
the control unit 100 is further configured to, after detecting that the UPS circuit 300 has a fault, stop power output of the UPS circuit 300, and switch to the power frequency circuit 200 to supply power to the transmitter 500.
Specifically, the control unit 100 includes a UPS detection unit configured to detect a fault type of the UPS circuit 300, and the control unit 100 is configured to control a switching speed when switching to the power frequency circuit 200 for power output according to the fault type of the UPS circuit 300.
Specifically, the fault types of the UPS circuit 300 include a UPS over-voltage state, a UPS under-voltage state, and a UPS low-frequency state;
the control unit 100 is configured to perform switching of the power frequency circuit 200 after delaying for 0.3 to 0.7 seconds when the UPS circuit 300 is in a UPS overvoltage state or a UPS undervoltage state;
the control unit 100 is configured to perform switching of the power frequency circuit 200 after delaying for 0.1-0.9 ms when the UPS circuit 300 is in a UPS low frequency state.
Specifically, switching unit 400 includes contactor or relay, contactor or relay are used for when normal operating, through normally closed contact will the UPS power supplies to changer 500, work as when the UPS power takes place excessive pressure, under-voltage or low frequency trouble contactor or relay actuation supplies the power frequency power to changer 500.
Specifically, above-mentioned dual power supply switching device still includes an alarm unit, and alarm unit is used for after power frequency circuit 200 breaks down, timely output alarm information to the suggestion fortune dimension personnel maintain power frequency circuit, in order to guarantee power frequency circuit 200's normal operating.
With continued reference to fig. 2, in the circuit structure of the embodiment of the present invention:
a contactor or a relay of a larger power is used to output power without using all electronic components.
The contactor (or higher power relay) supplies UPS power to the transmitter 500 through a normally closed contact during normal operation (i.e., before switching). When the UPS has overvoltage, undervoltage or low-frequency faults, the contactor is closed, and a power frequency power supply is supplied to the transmitter 500.
After the contactor is closed, self-locking is carried out by using the auxiliary contact of the contactor, and the self-locking can not be released until human intervention. The switching circuit can be prevented from generating uncertain faults to cause frequent jumping switching, and the UPS power supply can be returned after the fact that the UPS power supply is really hidden danger is confirmed manually.
The working power supply of the switching circuit is taken from a power frequency power supply to be switched, and if the power frequency power supply does not have voltage, the circuit cannot work, namely cannot be switched.
If the switching circuit has a fault in operation, such as element burning, the switching circuit cannot be switched, and no output is caused. Even if the switching circuit has faults to cause error switching, the contactor can not be removed until human intervention due to self-locking and attracting of the auxiliary contact of the contactor, namely, the power frequency power supply is electrified certainly, so that the influence is avoided.
The overvoltage switching and the low-frequency switching are slightly delayed, and when the UPS is in overvoltage or low-frequency, the switching is performed again after about 0.5 second, so that misoperation is prevented.
The under-voltage switching is instant switching, and when the UPS voltage disappears, the UPS is switched to the power frequency power supply after about several milliseconds (less than 10 milliseconds), which is enough to meet the requirement.
It can be understood that, in some embodiments of the present invention, for absolute reliability, the circuit does not seek advancement, but seeks simple and reliable, so that a circuit with advanced functions (preventing dead machine failure) such as a single chip microcomputer is not used, a self-operating power supply does not use a switching power supply but a traditional power supply, and all circuits are most traditional analog circuits.
After the embodiment of the invention is implemented, the output of the transmitter 500 does not have any fluctuation in the switching process through observation of an oscilloscope. The action speed of the contactor is faster when the UPS is switched to the power frequency than when the power frequency returns to the UPS, because the pull-in speed of the contactor is faster than the return speed. But in practice, neither switching nor returning has an effect on the transmitter 500 output.
In some embodiments of the present invention, referring to FIG. 3, the control unit 100 includes a circuit board. In the circuit board of the embodiment, the power frequency power supply is the voltage reduced by the transformer, about 18V, and is converted into direct current 12V voltage through the U2 voltage stabilizing block, so as to be the working power supply of the circuit board. After UPS voltage is reduced to low voltage by TF1, one path of ripple voltage without filtering is supplied to a low-frequency circuit by R17, and the other path of ripple voltage is supplied to an overvoltage and undervoltage circuit after being filtered by C4. The final action is output through the JD1 relay contact. The comparator uses LM339, and the output is open collector output, so the output can be directly connected in parallel. The frequency forming circuit is an LM555 integrated block. The Q1 triode is responsible for eliminating interference caused by circuit switching-in and power frequency power supply fluctuation.
In some embodiments of the present invention, referring to fig. 4, the present invention further provides a dual power switching method, which is implemented by using the dual power switching apparatus in the above embodiments, including the following steps:
step S101: respectively arranging a power frequency circuit and a UPS circuit to be connected with the transmitter;
step S102: and enabling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit breaks down or not in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit breaks down.
In some embodiments of the present invention, referring to fig. 5, when switching to the UPS circuitry for UPS power output to the transmitter, includes:
step S103: and detecting whether the UPS circuit breaks down or not, and after the UPS circuit breaks down, stopping power output of the UPS circuit, and switching to the power frequency circuit to supply power to the transmitter.
In some embodiments of the present invention, when the power frequency circuit fails, the UPS circuit is switched to output the UPS power to the transmitter, and then alarm information is output to prompt an operation and maintenance worker to maintain the power frequency circuit.
It can be seen that, in the above embodiments, the power frequency circuit and the UPS circuit are arranged to supply power for the dual power sources, and the determination of the fault circuit is used to switch the dual power sources in real time, so that the power supply can be effectively prevented from being switched in time when the UPS fails or does not meet the power supply requirement, the DCS device is prevented from being burnt down due to the failure or does not meet the power supply requirement of the UPS power source, and the safety of the device is ensured. Meanwhile, through fault detection of the power frequency circuit, UPS power supply switching can be carried out in time when the power frequency circuit breaks down, so that seamless power supply switching of the whole circuit can be guaranteed, the whole power supply stability is guaranteed, and the guaranteed DCS equipment can run stably.
It should be noted that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units described is merely a logical division, and other divisions may be realized in practice, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; while the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and they should be construed as being included in the following claims and description.
Claims (10)
1. A dual power switching device, comprising:
the power frequency circuit is used for outputting a power frequency power supply;
the UPS circuit is used for outputting a UPS power supply;
the control unit is respectively connected with the power frequency circuit and the UPS circuit, is also connected with the transmitter, and is used for switching the power frequency circuit or the UPS circuit to output power so as to output a power frequency power supply or a UPS power supply to the transmitter; the control unit is used for controlling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit fails in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit fails; the control unit is also used for switching to the power frequency circuit to output power frequency power supply to the transmitter after detecting that the UPS circuit has a fault;
and the switching unit is used for respectively switching the power frequency circuit or the UPS circuit to be communicated with the transmitter.
2. The dual power switching device of claim 1,
the control unit comprises a first mutual inductor which is used for detecting the current or the voltage of the power frequency circuit; wherein the content of the first and second substances,
and when the power frequency circuit has no current or voltage output, judging that the power frequency circuit has a fault.
3. The dual power switching device of claim 1,
the power frequency circuit is used for supplying power to the control unit, and a power frequency power supply output by the power frequency circuit provides a direct current power supply for the control unit after being stabilized by the voltage stabilizing module.
4. The dual power supply switching device according to claim 1,
the control unit comprises a second transformer, and the second transformer is used for detecting whether the UPS circuit is in failure;
the control unit is also used for stopping the power output of the UPS circuit after the UPS circuit is detected to be out of order, and switching to the power frequency circuit to supply power to the transmitter.
5. The dual power supply switching device according to claim 1,
the control unit comprises a UPS detection unit, the UPS detection unit is used for detecting the fault type of the UPS circuit, and the control unit is used for controlling the switching speed when the power frequency circuit carries out power output according to the fault type of the UPS circuit.
6. The dual power switching device of claim 5,
the fault types of the UPS circuit comprise a UPS overvoltage state, a UPS undervoltage state and a UPS low-frequency state;
the control unit is used for switching the power frequency circuit after delaying for 0.3-0.7 seconds when the UPS circuit is in a UPS overvoltage state or a UPS undervoltage state;
and the control unit is used for switching the power frequency circuit after delaying 0.1-0.9 milliseconds when the UPS circuit is in a UPS low-frequency state.
7. The dual power supply switching device according to claim 6,
the switching unit includes contactor or relay, contactor or relay are used for when normal operating, through normally closed contact handle the UPS power supplies to the changer, work as when the UPS power takes place excessive pressure, undervoltage or low frequency trouble contactor or relay actuation supply the changer with power frequency power.
8. A dual power switching method, wherein the method is implemented by the dual power switching apparatus according to any one of claims 1 to 7, comprising:
respectively arranging a power frequency circuit and a UPS circuit to be connected with the transmitter;
and enabling the power frequency circuit to continuously output a power frequency power supply to the transmitter, monitoring whether the power frequency circuit breaks down or not in real time, and switching to the UPS circuit to output the UPS power supply to the transmitter when the power frequency circuit breaks down.
9. The dual power supply switching device of claim 8, when switching to a UPS power output from the UPS circuit to the transmitter, comprising:
and detecting whether the UPS circuit breaks down or not, and after the UPS circuit breaks down, stopping power output of the UPS circuit and switching to the power frequency circuit to supply power to the transmitter.
10. The dual power supply switching device of claim 8, wherein when the power frequency circuit fails, the UPS circuit is switched to output a UPS power to the transmitter, and then an alarm message is output to prompt an operator to maintain the power frequency circuit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957377.0A CN115912599A (en) | 2022-08-10 | 2022-08-10 | Dual-power switching device and method |
| PCT/CN2023/092274 WO2024032047A1 (en) | 2022-08-10 | 2023-05-05 | Dual-power switching apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210957377.0A CN115912599A (en) | 2022-08-10 | 2022-08-10 | Dual-power switching device and method |
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| Publication Number | Publication Date |
|---|---|
| CN115912599A true CN115912599A (en) | 2023-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210957377.0A Pending CN115912599A (en) | 2022-08-10 | 2022-08-10 | Dual-power switching device and method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115912599A (en) |
| WO (1) | WO2024032047A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032047A1 (en) * | 2022-08-10 | 2024-02-15 | 华能山东泰丰新能源有限公司 | Dual-power switching apparatus and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100644335B1 (en) * | 2004-07-23 | 2006-11-15 | (주)아세아이엔티 | A uninterruptible power supply of the mode of the dual |
| CN113872313A (en) * | 2021-09-23 | 2021-12-31 | 华能南京金陵发电有限公司 | Circuit control method and power supply switching device |
| CN114825588A (en) * | 2022-04-18 | 2022-07-29 | 华能辛店发电有限公司 | Dual-power switching system and switching method for power plant transmitter |
| CN115912599A (en) * | 2022-08-10 | 2023-04-04 | 华能山东泰丰新能源有限公司 | Dual-power switching device and method |
-
2022
- 2022-08-10 CN CN202210957377.0A patent/CN115912599A/en active Pending
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2023
- 2023-05-05 WO PCT/CN2023/092274 patent/WO2024032047A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024032047A1 (en) * | 2022-08-10 | 2024-02-15 | 华能山东泰丰新能源有限公司 | Dual-power switching apparatus and method |
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| WO2024032047A1 (en) | 2024-02-15 |
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