CN107994679B - Dual-power automatic transfer switch conversion control method and dual-power automatic transfer switch - Google Patents
Dual-power automatic transfer switch conversion control method and dual-power automatic transfer switch Download PDFInfo
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- CN107994679B CN107994679B CN201711417336.8A CN201711417336A CN107994679B CN 107994679 B CN107994679 B CN 107994679B CN 201711417336 A CN201711417336 A CN 201711417336A CN 107994679 B CN107994679 B CN 107994679B
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims abstract description 69
- 238000001514 detection method Methods 0.000 claims description 26
- 230000005856 abnormality Effects 0.000 claims description 16
- 238000012790 confirmation Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 230000001934 delay Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
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Classifications
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses a conversion control method of a dual-power automatic transfer switch. If the double switches are in the common positions, when the fact that the common power supply is abnormal and lasts for time T1 and the standby power supply is normal is detected, the common positions are switched to the off positions no matter whether the common power supply is normal or not; if the switch is in the standby position, if the normal power supply is recovered and the time T3 is kept, the switch is switched from the standby position to the off position; waiting for a time T2 after the switch is switched to the off position, and if the standby power supply is normal during the time T2, switching from the off position to the standby position; if the standby power supply is abnormal and the normal power supply is normal in the period, the standby power supply is switched from the off position to the normal position after the time T2; if the standby power supply is abnormal and the normal power supply is not recovered to be normal during the period, the standby power supply is continuously stopped at the off position. The invention also discloses a dual-power automatic transfer switch. The invention can prevent frequent switching of the switch position when the voltage of the common power supply is unstable.
Description
Technical Field
The invention relates to a conversion control method for a dual-power automatic transfer switch, belonging to the technical field of low-voltage appliances.
background
The common automatic transfer switching equipment (called ATSE) is composed of switch component, mechanical interlocking, electric operating mechanism and controller, and has two positions of normal use and standby use or three positions of normal use, standby use and disconnection. In the normal and standby power supply systems, when one power supply has faults of undervoltage, overvoltage, frequency deviation, phase failure and the like, the switch can be automatically switched to the other normal power supply to ensure the reliability of power supply. When the switch needs to be overhauled, the switch can be rotated to the disconnection position and locked, so that the safety of personnel during switch overhauling operation is guaranteed.
The ATSE typically has three purposely introduced delay times, namely a power failure confirmation delay T1, an off position stay delay T2, and a power restoration decision delay T3.
The power failure confirmation delay T1 is a delay time from the detection of a deviation of a common power supply to the sending of an action command by the controller, which is specially introduced to avoid misoperation.
The artificially set delay time for the main contacts to switch from one position to another, which may be referred to as the off-position dwell time T2, is the dwell time of the three-position switch in the "off position" which is typically zero.
The determination time after the power recovery may be referred to as a power recovery determination delay T3.
The delays T1 and T3 are purposely introduced to avoid malfunctions, and the delay T2 determines the off-time of the load. In general, the longer the time set by T1 and T3, the lower the frequency of malfunction of the automatic transfer switch; the shorter the time set by T2, the shorter the load off time.
if the T1 and the T3 are set to be short, when the voltage of the power supply at the common side is abnormal and meets the delay T1, the switch is switched to the off position from the common power supply, and when the switch is switched to the off position, if the common power supply is recovered to be normal, under the conventional self-switching and self-resetting switching logic, the switch is switched to the common power supply from the current position. In addition, when the switch stays at the off position, as the T2 time delay is generally set to be short, once the power supply voltage on the common side is temporarily recovered for the time meeting the time delay T2, the switch is switched to the common power supply from the off position under the conventional self-switching and self-resetting switching logic. Therefore, when the normal-side power supply cannot maintain a stable normal voltage, the switch may be switched back and forth between the normal-side power supply and the off position, and a normal, stable and continuous power supply cannot be provided for the load device, so that even if the T1 and the T3 are set to be long, the probability of frequent switching is only reduced, and the problem cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a conversion control method of a dual-power automatic transfer switch, which can ensure that the dual-power automatic transfer switch cannot be frequently switched back and forth between a common position and a disconnection position or between the common position and a standby position when a common power supply cannot keep stable normal voltage.
The invention specifically adopts the following technical scheme to solve the technical problems:
A dual-power automatic transfer switch conversion control method, the said dual-power automatic transfer switch has three positions of common use, standby, disconnection, and there are power failure confirmation delay T1, disconnection position stay delay T2, power restoration judgment delay T3 in advance;
If the dual-power automatic transfer switch is in the common position, when the common power supply is detected to be abnormal and the abnormality continues to reach the time T1, and the standby power supply is normal, the dual-power automatic transfer switch is controlled to be switched from the common position to the off position no matter whether the common power supply is normal or not;
if the dual-power automatic transfer switch is in the standby position, if the common power supply is recovered to be normal and the time is kept T3, controlling the dual-power automatic transfer switch to be switched from the standby position to the off position;
waiting for a time T2 after the dual-power automatic transfer switch is transferred from the common position to the off position, if the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the standby position after reaching the time T2; if the standby power supply is abnormal and the common power supply is recovered to be normal in the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after the time T2 is reached; if the standby power supply is abnormal and the common power supply is not recovered to be normal in the period, controlling the dual-power automatic transfer switch to stay at the off position after the time T2 is reached;
Waiting for a time T2 after the dual-power automatic transfer switch is transferred from the standby position to the off position, if the common power supply is normal during the waiting time, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after reaching the time T2; if the common power supply is abnormal and the standby power supply is normal during the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the standby position after the time T2 is reached; if the normal power supply is abnormal and the standby power supply is also abnormal during the period, the dual-power automatic transfer switch is controlled to stay at the off position after the time T2 is reached.
In order to prevent the automatic transfer switch from frequently switching between the normal position and the standby position in the case where the T1 and T3 settings are short, the method of the present invention further comprises: and in an abnormal statistical period T4 from the detection of the abnormality of the common power supply, if the abnormal occurrence frequency of the common power supply exceeds a preset threshold value and the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be locked at a standby position.
Further, after the dual-power automatic transfer switch is locked at the standby position, if the common power supply is recovered to be normal and kept for time T5, or an unlocking instruction is received, the dual-power automatic transfer switch is controlled to release the locking.
Preferably, the unlocking instruction is sent by a reset operation, a menu operation or a host computer operation.
Preferably, the number of abnormal occurrences of the common power supply is counted by the following method: when the abnormal state of the common power supply is kept for a preset time T6 from the detection of the abnormal state of the common power supply, recording the abnormal state of the common power supply as the abnormal occurrence of one time; t6 is much smaller than T1, T3, T4.
Preferably, the method for detecting the power supply abnormality is specifically as follows: and calculating the sampled power supply voltage signal in each power supply detection period to obtain a voltage effective value, and if the voltage effective values obtained in a plurality of continuous power supply detection periods all meet a voltage abnormity judgment condition, judging that the power supply is abnormal.
preferably, the voltage abnormality determination condition includes: a voltage loss determination condition, an undervoltage determination condition, and an overvoltage determination condition.
preferably, the power detection period is 20 ms.
The following technical scheme can be obtained according to the same invention concept:
A double-power automatic transfer switch uses the transfer control method of any one of the above technical schemes.
Compared with the prior art, the invention has the following beneficial effects:
By adopting the conversion control method, when the common power supply can not keep stable normal voltage, the dual-power automatic transfer switch can not be frequently switched back and forth between the common position and the disconnection position, and can not be frequently switched back and forth between the common position and the standby position, so that the motor can be prevented from being overheated and burnt due to frequent actions.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating a conversion control method according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating another exemplary embodiment of a transition control method according to the present invention.
Detailed Description
In order to overcome the defects of the prior art, the idea of the invention is to improve the conversion control logic of the automatic change-over switch, which comprises the following specific steps:
if the dual-power automatic transfer switch is in the common position, when the common power supply is detected to be abnormal and the abnormality continues to reach the time T1, and the standby power supply is normal, the dual-power automatic transfer switch is controlled to be switched from the common position to the off position no matter whether the common power supply is normal or not;
If the dual-power automatic transfer switch is in the standby position, if the common power supply is recovered to be normal and the time is kept T3, controlling the dual-power automatic transfer switch to be switched from the standby position to the off position;
waiting for time T2 after the dual-power automatic transfer switch is switched to the off position, if the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be switched from the off position to the standby position after time T2 is reached; if the standby power supply is abnormal and the common power supply is recovered to be normal in the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after the time T2 is reached; if the standby power supply is abnormal and the common power supply is not recovered to be normal in the period, controlling the dual-power automatic transfer switch to stay at the off position after the time T2 is reached;
Waiting for a time T2 after the dual-power automatic transfer switch is transferred from the standby position to the off position, if the common power supply is normal during the waiting time, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after reaching the time T2; if the common power supply is abnormal and the standby power supply is normal during the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the standby position after the time T2 is reached; if the normal power supply is abnormal and the standby power supply is also abnormal during the period, the dual-power automatic transfer switch is controlled to stay at the off position after the time T2 is reached.
In order to prevent the automatic transfer switch from frequently switching between the normal position and the standby position in the case where the T1 and T3 settings are short, the present invention further adds the following control logic: and in an abnormal statistical period T4 from the detection of the abnormality of the common power supply, if the abnormal occurrence frequency of the common power supply exceeds a preset threshold value and the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be locked at a standby position.
Further, after the dual-power automatic transfer switch is locked at the standby position, if the common power supply is recovered to be normal and kept for time T5, or an unlocking instruction is received, the dual-power automatic transfer switch is controlled to release the locking.
preferably, the unlocking instruction is sent by a reset operation, a menu operation or a host computer operation.
Preferably, the number of abnormal occurrences of the common power supply is counted by the following method: when the abnormal state of the common power supply is kept for a preset time T6 from the detection of the abnormal state of the common power supply, recording the abnormal state of the common power supply as the abnormal occurrence of one time; t6 is much smaller than T1, T3, T4.
Preferably, the method for detecting the power supply abnormality is specifically as follows: and calculating the sampled power supply voltage signal in each power supply detection period to obtain a voltage effective value, and if the voltage effective values obtained in a plurality of continuous power supply detection periods all meet a voltage abnormity judgment condition, judging that the power supply is abnormal.
Preferably, the voltage abnormality determination condition includes: a voltage loss determination condition, an undervoltage determination condition, and an overvoltage determination condition.
Preferably, the power detection period is 20 ms.
For the public understanding, the following describes the technical scheme of the invention in further detail through two preferred embodiments of the conversion control method of the invention and the accompanying drawings:
examples 1,
for the case where the time delays T1 and T3 are set to be long, the method shown in fig. 1 can be used to control the switching of the dual power automatic transfer switch to prevent the automatic transfer switch from frequently switching back and forth between the normal position and the off position. The control flow is as follows:
The method comprises the steps that firstly, the AD sampling function of a microprocessor in an automatic transfer switch controller collects voltage signals of a common power supply and a standby power supply in real time, the microprocessor processes the voltage signals collected by the AD sampling in a power supply detection period, calculates effective values of the voltages of the common power supply and the standby power supply, and judges abnormal states such as power supply voltage loss, undervoltage, overvoltage and the like in a power supply judging period.
And step two, when the voltage of the common power supply is abnormal and the voltage of the standby power supply is normal, the time delay T1 starts to time, if the voltage of the common power supply is recovered to be normal within the time delay T1, the time delay T1 is stopped and reset to time, and the next power supply detection period is started. If the normal power supply voltage does not return to normal within the timing time of the time delay T1, the controller sends an instruction, and the automatic change-over switch starts to change from the normal position to the off position after the electric operating mechanism is powered on. In the process that the automatic change-over switch is changed to the off position, even if the voltage of the common power supply is recovered to be normal, the automatic change-over switch is still continuously changed to the off position.
And step three, after the automatic change-over switch is changed from the normal position to the off position, starting timing by delaying T2. In the timing process of the time delay T2, no matter whether the normal power supply voltage is recovered, as long as the standby power supply voltage is normal within the time delay T2, after the time delay T2 is up, the controller sends out an instruction, and the automatic change-over switch starts to change from the off position to the standby position after the electric operating mechanism is powered on. In the timing process of the time delay T2, if the normal power supply voltage is recovered to be normal and the standby power supply voltage is abnormal, after the time delay T2 is up, the controller sends out an instruction, and the automatic change-over switch starts to change from the off position to the normal position after the electric operating mechanism is powered on. During the timing of the delay T2, if the normal power supply voltage is not recovered to normal and the standby power supply voltage is abnormal, the automatic transfer switch stays at the off position and does not transfer.
And step four, after the automatic change-over switch is switched to the standby position, if the voltage of the common power supply is recovered to be normal, starting time delay T3 for timing, and if the voltage of the common power supply is not kept to be normal within the time delay T3, stopping and resetting time delay T3 for timing, and entering the next power supply detection period. If the voltage of the common power supply is kept normal within the time delay T3, after the time delay T3 is up, the controller sends a command, and the automatic change-over switch starts to change from the standby position to the off position after the electric operating mechanism is powered on.
and step five, after the automatic change-over switch is changed from the standby position to the off position, starting timing by delay T2. In the timing process of the time delay T2, no matter whether the standby power supply voltage is normal or not, as long as the normal power supply voltage is kept normal within the time delay T2, after the time delay T2 is up, the controller sends out an instruction, and the automatic change-over switch starts to change from the off position to the normal position after the electric operating mechanism is powered on. In the timing process of the time delay T2, if the normal power supply is abnormal and the standby power supply is normal, the dual-power automatic transfer switch is controlled to be transferred from the off position to the standby position after the time T2 is reached. During the timing of the delay T2, if the normal power supply voltage is not kept normal and the backup side power supply voltage is abnormal, the automatic transfer switch stays at the off position and does not transfer.
The power supply detection period refers to that voltage signals of the power supply at the common side and the power supply at the standby side, which are acquired by AD sampling, are calculated at regular intervals to obtain a voltage effective value. A preferred value for the power detection period is 20 ms.
The power supply judging period is that the power supply is judged to be abnormal if the effective voltage value calculated by a plurality of continuous power supply detecting periods meets any judging condition of voltage loss, undervoltage and overvoltage.
examples 2,
For the case where the delays T1 and T3 are set short, the changeover control method as shown in fig. 2 may be used to prevent the automatic changeover switch from frequently switching back and forth between the normal power supply side and the backup power supply side.
the method comprises the steps that firstly, the AD sampling function of a microprocessor in an automatic transfer switch controller collects voltage signals of a common power supply and a standby power supply in real time, the microprocessor processes the voltage signals collected by the AD sampling in a power supply detection period, calculates effective values of the voltages of the common power supply and the standby power supply, and judges abnormal states such as power supply voltage loss, undervoltage, overvoltage and the like in a power supply judging period.
And step two, when the voltage of the common power supply is abnormal and the standby power supply is normal, starting the time delays T1, T4 and T6 at the same time. If the common power supply voltage is recovered to be normal within the timing time of the time delay T1, stopping and resetting the time delay T1 for timing, and entering the next power supply detection period; if the normal power supply voltage does not return to normal within the timing time of the time delay T1, the controller sends an instruction, and the automatic change-over switch starts to change from the normal position to the off position after the electric operating mechanism is powered on. In the process of switching the automatic change-over switch to the off position, even if the voltage of the common power supply is recovered to be normal, the automatic change-over switch is still switched to the off position.
Waiting for a delay T2 after the switch has switched to the off position;
The standby power supply voltage is normal, and in the process of delaying T2, no matter whether the voltage of the common power supply is normal or not, the automatic change-over switch starts to change to the standby position;
Meanwhile, if the common power supply voltage is recovered to be normal within the timing time of the time delay T6, stopping and resetting the time delay T6 for timing, and entering the next power supply detection period; if the normal power supply voltage does not return to normal within the delay time of T6, the normal power supply voltage is counted as abnormal once after the time of T6 is delayed.
And step three, accumulating and recording the abnormal times of the common power supply voltage within the timing time of the time delay T4, wherein the abnormal times of the common power supply voltage are increased by 1 time when the common power supply voltage is abnormal once and meets the time delay T6.
after the time of the delay T4 is up, if the abnormal frequency of the common power supply voltage exceeds the set power supply abnormal frequency threshold value N, resetting the T4 delay, clearing the abnormal frequency of the common power supply voltage, wherein the standby power supply is normal during the period, and if the automatic change-over switch is in the standby position, the automatic change-over switch is locked at the standby position; if the automatic change-over switch is in the non-standby position, the controller sends an instruction, and the electric operating mechanism drives the automatic change-over switch to start to change over from the current position to the standby position after being electrified and is locked at the standby position. If the standby power supply is abnormal in the period, the dual-power automatic transfer switch does not execute locking action and stays at the current position. If the abnormal frequency of the common power supply voltage does not exceed the set power supply abnormal frequency threshold value N, resetting the time delay T4, clearing the abnormal frequency of the common side power supply voltage, and entering the next power supply detection period.
Step five, after the automatic change-over switch is locked at a standby position, if the voltage of the common power supply is recovered to be normal, starting a time delay T5 for timing, and within a time delay T5, if the voltage of the common power supply is kept to be normal, and after the time delay T5 is up, releasing the locking of the automatic change-over switch; and resetting the delay T5 and keeping the locking state of the automatic change-over switch if the common power supply voltage is not kept normal within the time delay T5, and entering the next power supply detection period.
And step six, after the automatic change-over switch is unlocked, if the voltage of the common power supply is normal, starting time delay T3 for timing, if the voltage of the common power supply is not kept normal within the time delay T3, stopping and resetting the time delay T3 for timing, and starting time delay T4 and T6 again for timing. If the voltage of the common power supply is kept normal within the time delay T3, and after the time delay T3 is up, the controller sends an instruction, and the electric operating mechanism drives the automatic change-over switch to start to change over from the standby position to the off position after being electrified. After the automatic transfer switch is switched to the off position, a delay T2 is waited during which the usual power supply voltage is normal, and after a delay T2, the automatic transfer switch continues to be switched to the usual position.
The delay T4 is an abnormal statistical period for cumulatively counting the number of times of abnormality of the power supply voltage on the common side within the delay time.
The delay T5 is a delay introduced by people and is used for confirming that the voltage of the common power supply is recovered, and the automatic change-over switch is unlocked after the delay is reached.
The delay T6 is a delay introduced manually and is used for confirming that the voltage of the common power supply is abnormal, the delay T6 is started to time when the voltage of the common power supply is abnormal, if the voltage of the common power supply is not recovered to be normal within the time of the delay T6, the abnormality of the voltage of the common power supply is confirmed after the delay T6 is reached, and the abnormality of the voltage of the common power supply is recorded for 1 time.
The power supply abnormality number threshold N is the maximum power supply abnormality number allowed in T4 time.
in this embodiment, after the automatic transfer switch is locked at the standby position, the locked state of the unlocking switch can be unlocked by operations such as resetting, menus, an upper computer and the like.
The relation among the automatic change-over switch time delays T1, T3, T4 and T6 is preferably T6-T1 < T4 and T6-T3 < T4.
Claims (7)
1. A dual-power automatic transfer switch conversion control method, the said dual-power automatic transfer switch has three positions of common use, standby, disconnection, and there are power failure confirmation delay T1, disconnection position stay delay T2, power restoration judgment delay T3 in advance; it is characterized in that the preparation method is characterized in that,
If the dual-power automatic transfer switch is in the common position, when the common power supply is detected to be abnormal and the abnormality continues to reach the time T1, and the standby power supply is normal, the dual-power automatic transfer switch is controlled to be switched from the common position to the off position no matter whether the common power supply is normal or not;
if the dual-power automatic transfer switch is in the standby position, if the common power supply is recovered to be normal and the time is kept T3, controlling the dual-power automatic transfer switch to be switched from the standby position to the off position;
Waiting for a time T2 after the dual-power automatic transfer switch is transferred from the common position to the off position, if the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the standby position after reaching the time T2; if the standby power supply is abnormal and the common power supply is recovered to be normal in the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after the time T2 is reached; if the standby power supply is abnormal and the common power supply is not recovered to be normal in the period, controlling the dual-power automatic transfer switch to stay at the off position after the time T2 is reached;
Waiting for a time T2 after the dual-power automatic transfer switch is transferred from the standby position to the off position, if the common power supply is normal during the waiting time, controlling the dual-power automatic transfer switch to be transferred from the off position to the common position after reaching the time T2; if the common power supply is abnormal and the standby power supply is normal during the period, controlling the dual-power automatic transfer switch to be transferred from the off position to the standby position after the time T2 is reached; if the common power supply is abnormal and the standby power supply is also abnormal during the period, controlling the dual-power automatic transfer switch to stay at the off position after the time T2 is reached;
In an abnormal statistical period T4 time from the detection of the abnormality of the common power supply, if the abnormal occurrence frequency of the common power supply exceeds a preset threshold value and the standby power supply is normal in the period, controlling the dual-power automatic transfer switch to be locked at a standby position; after the dual-power automatic transfer switch is locked at the standby position, if the common power supply is recovered to be normal and is kept for time T5, or an unlocking instruction is received, the dual-power automatic transfer switch is controlled to be unlocked.
2. the method of claim 1, wherein the unlock command is sent through a reset operation, a menu operation, or a host computer operation.
3. the method of claim 1, wherein the number of abnormal occurrences of the common power source is counted by: when the abnormal state of the common power supply is kept for a preset time T6 from the detection of the abnormal state of the common power supply, recording the abnormal state of the common power supply as the abnormal occurrence of one time; t6 is much smaller than T1, T3, T4.
4. The method of claim 1, wherein the power source abnormality is detected by a method comprising: and calculating the sampled power supply voltage signal in each power supply detection period to obtain a voltage effective value, and if the voltage effective values obtained in a plurality of continuous power supply detection periods all meet a voltage abnormity judgment condition, judging that the power supply is abnormal.
5. the method of claim 4, wherein the voltage anomaly determination condition comprises: a voltage loss determination condition, an undervoltage determination condition, and an overvoltage determination condition.
6. The method of claim 4, wherein the power detection period is 20 ms.
7. A dual power automatic transfer switch characterized by using the transfer control method according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711417336.8A CN107994679B (en) | 2017-12-25 | 2017-12-25 | Dual-power automatic transfer switch conversion control method and dual-power automatic transfer switch |
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| CN201711417336.8A CN107994679B (en) | 2017-12-25 | 2017-12-25 | Dual-power automatic transfer switch conversion control method and dual-power automatic transfer switch |
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| CN107994679A CN107994679A (en) | 2018-05-04 |
| CN107994679B true CN107994679B (en) | 2019-12-17 |
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| US11837909B2 (en) | 2021-12-30 | 2023-12-05 | Chicony Power Technology Co., Ltd. | Intelligent stable power supply system |
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| CN108964252A (en) * | 2018-05-24 | 2018-12-07 | 太仓鸿策创达广告策划有限公司 | A kind of power-out reset system |
| CN110198076A (en) * | 2019-05-27 | 2019-09-03 | 国网河北省电力有限公司邢台供电分公司 | Automatic power-supply switch |
| CN111864885B (en) * | 2020-07-14 | 2022-04-22 | 苏州浪潮智能科技有限公司 | A hard disk power supply control device and method |
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| TW201128906A (en) * | 2010-04-13 | 2011-08-16 | Eneraiser Technology Co Ltd | High-reliability dual power automatic switching loop and isolation device thereof |
| CN102013349B (en) * | 2010-12-17 | 2013-07-03 | 常熟开关制造有限公司(原常熟开关厂） | Electric appliance working status inductor of automatic three-position switch |
| CN202197145U (en) * | 2011-09-19 | 2012-04-18 | 河北工业大学 | Intelligent dual-power automatic transfer switch |
| CN204809972U (en) * | 2015-05-23 | 2015-11-25 | 浙江乾泰电气有限公司 | A double power supply change -over switch |
| CN106655472A (en) * | 2016-12-30 | 2017-05-10 | 施耐德万高（天津）电气设备有限公司 | Mutual backup control method of excitation type dual-power supply automatic changeover switch |
| CN106787145B (en) * | 2016-12-30 | 2020-05-22 | 施耐德万高（天津）电气设备有限公司 | Electromagnet coil power-on protection method of excitation type double-power-supply automatic transfer switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11837909B2 (en) | 2021-12-30 | 2023-12-05 | Chicony Power Technology Co., Ltd. | Intelligent stable power supply system |
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