CN106532923B - The control method and device of AC/DC universal type transfer switch - Google Patents
The control method and device of AC/DC universal type transfer switch Download PDFInfo
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- CN106532923B CN106532923B CN201710009909.7A CN201710009909A CN106532923B CN 106532923 B CN106532923 B CN 106532923B CN 201710009909 A CN201710009909 A CN 201710009909A CN 106532923 B CN106532923 B CN 106532923B
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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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Abstract
The invention discloses a kind of control methods of AC/DC universal type transfer switch.This method identifies the alternating current-direct current type of power supply according to the voltage sample data of power supply first and calculates supply voltage value；Then according to the power supply alternating current-direct current type identified, by by calculated supply voltage value be compared with fault distinguishing voltage parameter corresponding to the alternating current-direct current type, judge power supply whether failure；Corresponding power supply switching motion is finally executed according to preset power supply transformation rule.The invention also discloses a kind of control device of AC/DC universal type transfer switch and a kind of AC/DC universal type transfer switches.Compared with prior art, the present invention is suitable for Communication-Communication, AC-DC, and the transfer switch of DC-DC any type power supply environment has high versatility, and cost of implementation is cheap.
Description
Technical field
The present invention relates to a kind of control methods of transfer switch more particularly to a kind of AC/DC universal type power supply to convert
The control method and device of switch.
Background technique
Currently, what automatic change-over had been widely used as making important load in low-voltage circuit not allowing to power off essential sets
It is standby, to complete the power supply automatic conversion of two-way or multiple power supplies system, guarantee the reliability of responsible consumer power supply.However, at present
Transfer switch, the overwhelming majority is only applicable to the powered types of Communication-Communication (i.e. often, stand-by power source be AC power source),
But the transfer switch in the applications such as accident lighting system needs the powered types suitable for AC-DC.No
Power supply type needed for same power supply environment is different, it is necessary to which the transfer switch of different model virtually increases market
The type of middle transfer switch causes user's type selecting difficult.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and to provide a kind of AC/DC universal type power supplys
The control method and device of change-over switch, it is suitable for Communication-Communication, AC-DC, DC-DC any type supply rings
The transfer switch in border has high versatility.
The present invention specifically uses following technical scheme to solve above-mentioned technical problem:
The control method of AC/DC universal type transfer switch identifies electricity according to the voltage sample data of power supply first
The alternating current-direct current type in source simultaneously calculates supply voltage value；Then according to the power supply alternating current-direct current type identified, by will be counted
The supply voltage value of calculating is compared with fault distinguishing voltage parameter corresponding to the alternating current-direct current type, whether judges power supply
Failure；Corresponding power supply switching motion is finally executed according to preset power supply transformation rule.
Preferably, the fault distinguishing voltage parameter includes at least one of following parameter: decompression differentiation voltage threshold,
Under-voltage differentiation voltage threshold, over-voltage differentiate voltage threshold.
Preferably, the supply voltage value is supply voltage virtual value.
Preferably, the supply voltage value is calculated by the following method: first according to the voltage sample data of power supply
Primary power voltage value is calculated, then according to the power supply alternating current-direct current type identified, using opposite with the alternating current-direct current type
The voltage correction factor answered is modified primary power voltage value, to obtain final supply voltage value.
Preferably, the recognition methods of power supply alternating current-direct current type is specific as follows: using voltage A/D sample circuit to electricity to be identified
Source output voltage is sampled, and the variance of the voltage A/D sampled value in predetermined period and preset alternating current-direct current are distinguished threshold value
It is compared, the such as larger than described alternating current-direct current distinguishes threshold value, then power supply to be identified is AC power source, and otherwise, power supply to be identified is straight
Galvanic electricity source.
Further, the recognition methods of the power supply alternating current-direct current type further include: alternating current-direct current is being carried out to power supply to be identified
Before type identification, first the virtual value of the voltage A/D sampled value in predetermined period is compared with preset virtual value threshold value,
Such as larger than virtual value threshold value then judges that power supply to be identified for non-zero voltage power supply, continues to carry out alternating current-direct current type identification to it；It is no
Then, judge that power supply to be identified for no-voltage power supply, no longer carries out alternating current-direct current type identification to it.
Alternatively, the recognition methods of power supply alternating current-direct current type is specific as follows: first lifting the supply voltage of power supply to be identified
It rises, then supply voltage and lifting voltage is sampled using identical voltage A/D sample circuit, and will be every in predetermined period
The supply voltage A/D sampled value of the power supply to be identified of a sampled point is compared with lifting voltage A/D sampled value, such as the default week
The supply voltage A/D sampled value of each sampled point is all larger than or is respectively less than lifting voltage A/D sampled value in phase, then power supply to be identified
For DC power supply, if existing simultaneously the case where supply voltage A/D sampled value is larger and smaller than lifting voltage A/D sampled value, to
Identification power supply is AC power source, if the supply voltage A/D sampled value of each sampled point is equal to lifting voltage in the predetermined period
A/D sampled value, then power supply to be identified is no-voltage power supply.
Following technical scheme can also be obtained according to identical invention thinking:
The control device of AC/DC universal type transfer switch, comprising:
Alternating current-direct current recognition unit identifies the alternating current-direct current type of power supply for the voltage sample data according to power supply；
Voltage computation unit, for calculating supply voltage value according to the voltage sample data of power supply；
Fault distinguishing and converting unit, the power supply alternating current-direct current type identified according to alternating current-direct current recognition unit, pass through by
Voltage computation unit calculated supply voltage value compared with fault distinguishing voltage parameter corresponding to the alternating current-direct current type
Compared with, judge power supply whether failure, corresponding power supply switching motion is then executed according to preset power supply transformation rule.
Preferably, the fault distinguishing voltage parameter includes at least one of following parameter: decompression differentiation voltage threshold,
Under-voltage differentiation voltage threshold, over-voltage differentiate voltage threshold.
Preferably, the supply voltage value is supply voltage virtual value.
Preferably, the voltage computation unit includes:
Voltage computing module, for calculating primary power voltage value according to the voltage sample data of power supply；
Voltage correction module, the power supply alternating current-direct current type for being identified according to alternating current-direct current recognition unit, using with this
The corresponding voltage correction factor of alternating current-direct current type is modified the primary power voltage value that voltage computing module exports rear defeated
Final supply voltage value out.
Preferably, the alternating current-direct current recognition unit specifically includes:
Voltage A/D sample circuit, for being sampled to electric power output voltage to be identified；
Variance computing module, for calculating the side for the voltage A/D sampled value that voltage A/D sample circuit exports in predetermined period
Difference；
Identification module, the variance for exporting variance computing module are distinguished threshold value with preset alternating current-direct current and are compared,
The such as larger than described alternating current-direct current distinguishes threshold value, then power supply to be identified is AC power source, and otherwise, power supply to be identified is DC power supply.
Further, described device further include:
Non-zero voltage recognition unit, for alternating current-direct current recognition unit to power supply to be identified carry out alternating current-direct current type identification it
Before, first the virtual value of the voltage A/D sampled value in predetermined period is compared with preset virtual value threshold value, such as larger than effectively
It is worth threshold value, then judges power supply to be identified for non-zero voltage power supply, notice alternating current-direct current recognition unit carries out alternating current-direct current type identification；It is no
Then, judge that power supply to be identified for no-voltage power supply, notifies alternating current-direct current recognition unit without alternating current-direct current type identification.
Alternatively, the alternating current-direct current recognition unit specifically includes:
Voltage is lifted circuit, is lifted for the supply voltage to power supply to be identified；
Voltage A/D sample circuit is sampled for the supply voltage to power supply to be identified with lifting voltage；
Identification module, for by the electricity to be identified of voltage A/D sample circuit each sampled point obtained in predetermined period
The supply voltage A/D sampled value in source is compared with lifting voltage A/D sampled value, such as the electricity of each sampled point in the predetermined period
Source voltage A/D sampled value is all larger than or is respectively less than lifting voltage A/D sampled value, then power supply to be identified is DC power supply, if simultaneously
The case where there are supply voltage A/D sampled values larger and smaller than lifting voltage A/D sampled value, then power supply to be identified is alternating current
Source, if the supply voltage A/D sampled value of each sampled point is equal to lifting voltage A/D sampled value in the predetermined period, wait know
Other power supply is no-voltage power supply.
A kind of AC/DC universal type transfer switch, including as above control device described in any technical solution.
Compared with prior art, the invention has the following advantages:
Control device of the present invention is applicable to Communication-Communication, AC-DC, and DC-DC any type is powered environment
Transfer switch has high versatility, and when user's type selecting need to only consider contact capacity, without regard to power supply class
Type reduces unnecessary trouble；
Alternating current-direct current recognition methods of the present invention is not only high to power supply type recognition accuracy, and method is simple, real
It is existing low in cost；
To it is existing with the controller of voltage sampling circuit for, it is not necessary to increase other any hardware devices, it is only necessary to right
Controller, which carries out software upgrading, can be realized technical solution of the present invention, therefore be with a wide range of applications.
Detailed description of the invention
Fig. 1 is the structural block diagram of the AC/DC universal type dual-power transfer switch in specific embodiment；
Fig. 2 is a kind of physical circuit figure of voltage A/D sample circuit；
Fig. 3 is a kind of specific implementation flow of control method of the present invention；
Fig. 4 is another specific implementation flow of control method of the present invention.
Fig. 5 is another physical circuit figure of voltage A/D sample circuit.
Specific embodiment
The control method of AC/DC universal type transfer switch of the present invention, comprising the following steps:
Step 1 identifies the alternating current-direct current type of power supply according to the voltage sample data of power supply and calculates supply voltage value；
Found through inventor's numerous studies, the waveform of voltage A/D sample circuit input signal with input power type not
There is larger difference together, it can be considered to the automatic identification of power of alterating and direct current is carried out using this difference.In mathematical statistics
In have a noun " variance ", variance, that is, each data are respectively and the average of the quadratic sum of the difference of its average.In many realities
In the problem of border, variance reflection is departure degree, is the metric for measuring source data and desired value difference.If by input signal Uo
Average value as desired value, then the deviation of AC power source Uo waveform and desired value is obviously than DC power supply Uo waveform and expectation
The deviation of value is big, that is the variance yields of AC power source Uo waveform is bigger than the variance yields of DC power supply Uo waveform, thus can differentiate
Input power type is exchange or direct current.For the variance of input signal Uo, when sampling is interfered, clipping, filtering etc.
Measure can filter out interference to a certain extent, and final variance yields can fluctuate in allowed limits, can both pass through setting in this way
Suitable relatively threshold value differentiates AC or DC power, can determine that input is DC power supply less than compare threshold value, be greater than than
It can determine that input is AC power source compared with threshold value.
Based on principles above, present invention further proposes a kind of accurate and easy power supply alternating current-direct current type identification sides
Method, specifically: power input voltage to be identified is sampled using voltage A/D sample circuit, and by the electricity in predetermined period
Press variance and the preset alternating current-direct current of A/D sampled value to distinguish threshold value to be compared, the such as larger than described alternating current-direct current differentiation threshold value, then to
Identification power supply is AC power source, and otherwise, power supply to be identified is DC power supply.The power input voltage is to power supply to be identified
Voltage carries out decompression processing.
It can quickly judge that the alternating current-direct current type of power supply, accuracy are also preferable using the above scheme；However, in a small number of feelings
Under condition, the supply voltage of input may level off to zero, can show that input power is the mistake of DC power supply using above scheme at this time
Accidentally result.In order to avoid this mistakes and omissions, the invention proposes a kind of further improvement schemes, i.e., identify it in progress alternating current-direct current
Before, first carry out non-zero voltage identification, specifically, first by the virtual value of the voltage A/D sampled value in predetermined period with it is preset
Virtual value threshold value is compared, such as larger than virtual value threshold value, then judges power supply to be identified for non-zero voltage power supply, continue to its into
The identification of row alternating current-direct current；Otherwise, power supply to be identified is judged for no-voltage power supply, and alternating current-direct current identification is no longer carried out to it, but directly
Corresponding power supply switching motion is executed according to preset power supply transformation rule.
Another power supply alternating current-direct current kind identification method also can be used in the present invention, specific as follows: first by power supply to be identified
Supply voltage be lifted, then using identical voltage A/D sample circuit to supply voltage and lifting voltage sample,
And by the supply voltage A/D sampled value of the power supply to be identified of sampled point each in predetermined period with lifting voltage A/D sampled value into
Row compares, and adopts as the supply voltage A/D sampled value of each sampled point in the predetermined period is all larger than or is respectively less than lifting voltage A/D
Sample value, then power supply to be identified is DC power supply, if existing simultaneously supply voltage A/D sampled value larger and smaller than lifting voltage A/D
The case where sampled value, then power supply to be identified is AC power source, if the supply voltage A/D of each sampled point is sampled in the predetermined period
Value is equal to lifting voltage A/D sampled value, then power supply to be identified is no-voltage power supply.
Wherein, the supply voltage A/D sampled value of the power supply to be identified by sampled point each in predetermined period is the same as lifting
Voltage A/D sampled value is compared, and can be the supply voltage A/D sampled value of each sampled point and lifting voltage A/D sampling
Value is compared correspondingly, be also possible to by the supply voltage A/D sampled value of each sampled point respectively with lifting voltage A/D
The average value of sampled value is compared.
Equally, for the no-voltage power conditions identified, corresponding electricity is directly executed according to preset power supply transformation rule
Source switching motion.This method needs to increase voltage lifting circuit, but can disposably judge power supply to be identified be AC power source, it is straight
Galvanic electricity source or no-voltage power supply.
The fault distinguishing voltage ginseng for corresponding respectively to DC power supply and AC power source is preset in control device of the invention
Number, to select corresponding parameter according to the alternating current-direct current type identification result of power supply.Wherein, the fault distinguishing voltage parameter is specific
It can be chosen according to used fault distinguishing technology, for example, may include one of following parameter or a variety of: decompression differentiates electricity
Threshold value, under-voltage differentiation voltage threshold, over-voltage is pressed to differentiate voltage threshold.
According to the voltage sample data of power supply can calculate supply voltage value (such as voltage effective value, average voltage etc.,
This is existing mature technology, and details are not described herein again).If power supply is identified as DC power supply, by calculated power supply electricity
Pressure value is compared with the fault distinguishing voltage parameter of DC power supply, can determine the DC power supply whether failure and failure
Type；, whereas if power supply is identified as AC power source, then the failure of calculated supply voltage value and AC power source is sentenced
Other voltage parameter is compared, can determine the AC power source whether failure and fault type.
In order to further increase the accuracy of breakdown judge, preferred embodiments of the present invention are the alternating current-direct current types according to power supply
To according to the calculated supply voltage value of voltage sample data of power supply (for the sake of difference, being called primary power voltage value) into
It goes after correcting accordingly, then be compared with corresponding fault distinguishing voltage parameter；It is respectively corresponded specifically, being preset with
In the voltage correction factor of AC power source and DC power supply；When calculating supply voltage value, first according to the voltage sample of power supply
Data calculate primary power voltage value, then according to the power supply alternating current-direct current type identified, using with the alternating current-direct current type
Corresponding voltage correction factor is modified primary power voltage value, to obtain final supply voltage value.
Step 2, according to the power supply alternating current-direct current type identified, by the way that the calculated supply voltage value of institute and the friendship is straight
Fault distinguishing voltage parameter corresponding to stream type is compared, judge power supply whether failure and specific fault type；
Step 3 executes corresponding power supply switching motion according to preset power supply transformation rule；
Specific power failure judgement and power supply transformation rule can directly adopt existing mature technology, no longer superfluous herein
It states.
For the ease of public understanding, next pair by taking a simplest AC/DC universal type dual-power transfer switch as an example below
Technical solution of the present invention is further elaborated.
Fig. 1 shows the basic structure of AC/DC universal type dual-power transfer switch in the present embodiment.As shown in Figure 1, should
Dual-power transfer switch includes handing over straight/stream-converting unit, power supply unit, voltage detection unit, driving unit, microprocessor list
Member, position of the switch detection unit and man-machine interaction unit, after the power supply of major loop is converted to direct current by AC/DC converting unit
Power supply source unit, voltage detection unit and driving unit use；Microprocessor unit is at a certain time interval to voltage detecting
Unit, position of the switch detection unit carry out the state-detections such as normal, backup power source state and switch conjunction point, after handling by analysis,
It is acted, and is transferred information on the interface of man-machine interaction unit by driving unit, and pass through man-machine interaction unit
Interface receives outside and is configured to automatic change-over mode.
Fig. 2 shows a kind of physical circuit of voltage detection unit.As shown in Fig. 2, the power supply to be identified of input is through bridge heap
B1 rectification, resistance R1 and R2 partial pressure, amplifier U1 are followed, are isolated using optocoupler TL1 and export, the input microprocessor after amplifier U2
A/D thief hatch.
Fig. 3 shows a kind of specific control flow of microprocessor unit, specific as follows:
1) operation needed for completing dual-power transfer switch control, action parameter initialization, the parameter of initialization are product
The parameter or the parameter after last time tune-up of factory default.These parameters include: alternating-current parameter, repairing including ac voltage
Positive coefficient, decompression discrimination threshold, under-voltage discrimination threshold, the over-voltage discrimination threshold of AC power source；DC parameter, including DC voltage
The correction factor of value, decompression discrimination threshold, under-voltage discrimination threshold, the over-voltage discrimination threshold of DC power supply.
2) the collected data of voltage detection unit are analyzed and processed.
3) according to obtained voltage A/D sampled data, the first above-mentioned power supply alternating current-direct current kind identification method, identification are utilized
The power supply type of the main power source or backup power source that input out.
4) power supply type of main power source or backup power source according to obtained in step 2), microprocessor unit call respectively with
The voltage value correction factor of the corresponding parameter of main power source power supply type or parameter corresponding with backup power source power supply type, calling is used
It is calculated in the voltage value of step 5), the power supply decompression of calling differentiates that voltage threshold, under-voltage differentiation voltage threshold, over-voltage differentiate voltage
Power supply status of the threshold value for step 6) differentiates.When power supply type is exchange, alternating-current parameter is called, when power supply type is direct current
When, call DC parameter.
5) according to the voltage value correction factor in step 4) in call parameters, the collected voltage of voltage detection unit is utilized
Virtual value, calculates separately the voltage value of main power source or backup power source, and main power voltage value=collected main power voltage is effective
Value * main power voltage correction factor, backup power source voltage value=collected backup power source voltage virtual value * backup power source voltage
Correction factor.Power supply status of the voltage value of the main power source or backup power source that are calculated for step 6) differentiates.
6) the power supply decompression in the parameter called according to step 4) differentiates voltage threshold, under-voltage differentiation voltage threshold and over-voltage
Differentiate that voltage threshold judges main power source or spare using the voltage value of the main power source or backup power source that are calculated in step 5)
The power supply status of power supply.When main power voltage value, which is less than main power source decompression, differentiates voltage threshold, main power source is judged to decompression；Work as master
When supply voltage value is less than main power source under-voltage differentiation voltage threshold, main power source is judged to under-voltage；When main power voltage value is greater than main electricity
When source over-voltage differentiates voltage threshold, main power source is judged to over-voltage；Voltage is differentiated when backup power source voltage value is less than backup power source decompression
When threshold value, backup power source is judged to decompression；When backup power source voltage value is less than spare under-voltage differentiation voltage threshold, backup power source is sentenced
It is under-voltage；When backup power source voltage value, which is greater than spare over-voltage, differentiates voltage threshold, backup power source is judged to over-voltage；
7) differentiating as a result, executing switch condition according to step 6).If meeting switch condition, driving unit output driving letter
Number, control switch conversion, conversely, being failure to actuate if being unsatisfactory for switch condition.According to step 5) and 6) preferred scheme is
As a result, and in conjunction with current switch conjunction/gate-dividing state that detection unit transmission in the position of the switch comes, execution switch condition differentiation.
8) microprocessor unit exports the signals such as corresponding power supply instruction, switch state, fault alarm, in human-computer interaction list
Relevant information can be also shown on the interface of member.After having executed this step, the above process is executed since step 2) again.
Fig. 4 shows the specific control flow of another kind of microprocessor unit, with Fig. 3 control flow the difference is that,
After step 7 is rapid, the above process is executed since step 5) again.
Fig. 5 shows another physical circuit of voltage detection unit, and it is suitable for above-mentioned second of power supply alternating current-direct current classes
Type recognition methods.As shown in figure 5, the power supply to be identified of input is divided through resistance R1 and R2, through being lifted voltage VrefLifting, amplifier
U1 is followed, and is isolated using optocoupler TL1 and is exported, the input microprocessor A/D thief hatch after amplifier U2.
For the AC power source type identified, above-mentioned alternating-current parameter can also include frequency threshold, by sampling
To frequency compared with frequency threshold, obtain whether overfrequency or under-frequency failure, to be executed according to preset transformation rule dynamic
Make.
Claims (15)
1. the control method of AC/DC universal type transfer switch, which is characterized in that first according to the voltage sample number of power supply
According to the alternating current-direct current type for identifying power supply and calculate supply voltage value；Then according to the power supply alternating current-direct current type identified,
By by calculated supply voltage value be compared with fault distinguishing voltage parameter corresponding to the alternating current-direct current type, judge
Have power supply whether failure；Corresponding power supply switching motion is finally executed according to preset power supply transformation rule.
2. method as described in claim 1, which is characterized in that the fault distinguishing voltage parameter include in following parameter at least
A kind of: decompression differentiates that voltage threshold, under-voltage differentiation voltage threshold, over-voltage differentiate voltage threshold.
3. method as described in claim 1, which is characterized in that the supply voltage value is supply voltage virtual value.
4. method as described in claim 1, which is characterized in that the supply voltage value is calculated by the following method: first
Primary power voltage value is calculated according to the voltage sample data of power supply, then according to the power supply alternating current-direct current type identified,
Primary power voltage value is modified using voltage correction factor corresponding with the alternating current-direct current type, to obtain final
Supply voltage value.
5. method as described in claim 1, which is characterized in that the recognition methods of power supply alternating current-direct current type is specific as follows: utilizing electricity
Pressure A/D sample circuit samples electric power output voltage to be identified, and by the variance of the voltage A/D sampled value in predetermined period
It distinguishes threshold value with preset alternating current-direct current to be compared, the such as larger than described alternating current-direct current distinguishes threshold value, then power supply to be identified is alternating current
Source, otherwise, power supply to be identified are DC power supply.
6. method as claimed in claim 5, which is characterized in that the recognition methods of the power supply alternating current-direct current type further include: right
Before power supply to be identified carries out alternating current-direct current type identification, first by the virtual value of the voltage A/D sampled value in predetermined period and default
Virtual value threshold value be compared, such as larger than virtual value threshold value then judges that power supply to be identified for non-zero voltage power supply, continues to it
Carry out alternating current-direct current type identification；Otherwise, judge that power supply to be identified for no-voltage power supply, no longer carries out alternating current-direct current type knowledge to it
Not.
7. method as described in claim 1, which is characterized in that the recognition methods of power supply alternating current-direct current type is specific as follows: first will be to
The supply voltage of identification power supply is lifted, then using identical voltage A/D sample circuit to supply voltage and lifting voltage
It is sampled, and by the supply voltage A/D sampled value of the power supply to be identified of sampled point each in predetermined period with lifting voltage A/D
Sampled value is compared, and is lifted as the supply voltage A/D sampled value of each sampled point in the predetermined period is all larger than or is respectively less than
Voltage A/D sampled value, then power supply to be identified is DC power supply, if existing simultaneously supply voltage A/D sampled value larger and smaller than lift
The case where up voltage A/D sampled value, then power supply to be identified is AC power source, if the power supply of each sampled point is electric in the predetermined period
Pressure A/D sampled value is equal to lifting voltage A/D sampled value, then power supply to be identified is no-voltage power supply.
8. the control device of AC/DC universal type transfer switch characterized by comprising
Alternating current-direct current recognition unit identifies the alternating current-direct current type of power supply for the voltage sample data according to power supply；
Voltage computation unit, for calculating supply voltage value according to the voltage sample data of power supply；
Fault distinguishing and converting unit, the power supply alternating current-direct current type identified according to alternating current-direct current recognition unit, by by voltage
Computing unit calculated supply voltage value be compared with fault distinguishing voltage parameter corresponding to the alternating current-direct current type, sentence
It is disconnected have power supply whether failure, then according to the corresponding power supply switching motion of preset power supply transformation rule execution.
9. device as claimed in claim 8, which is characterized in that the fault distinguishing voltage parameter include in following parameter at least
A kind of: decompression differentiates that voltage threshold, under-voltage differentiation voltage threshold, over-voltage differentiate voltage threshold.
10. device as claimed in claim 8, which is characterized in that the supply voltage value is supply voltage virtual value.
11. device as claimed in claim 8, which is characterized in that the voltage computation unit includes:
Voltage computing module, for calculating primary power voltage value according to the voltage sample data of power supply；
Voltage correction module, the power supply alternating current-direct current type for being identified according to alternating current-direct current recognition unit, using straight with the friendship
The corresponding voltage correction factor of stream type exports most after being modified to the primary power voltage value that voltage computing module exports
Whole supply voltage value.
12. device as claimed in claim 8, which is characterized in that the alternating current-direct current recognition unit specifically includes:
Voltage A/D sample circuit, for being sampled to electric power output voltage to be identified；
Variance computing module, for calculating the variance for the voltage A/D sampled value that voltage A/D sample circuit exports in predetermined period；
Identification module, the variance for exporting variance computing module is distinguished threshold value with preset alternating current-direct current and is compared, such as big
Threshold value is distinguished in the alternating current-direct current, then power supply to be identified is AC power source, and otherwise, power supply to be identified is DC power supply.
13. device as claimed in claim 12, which is characterized in that further include:
Non-zero voltage recognition unit is used for before alternating current-direct current recognition unit carries out alternating current-direct current type identification to power supply to be identified,
First the virtual value of the voltage A/D sampled value in predetermined period is compared with preset virtual value threshold value, such as larger than virtual value
Threshold value judges power supply to be identified then for non-zero voltage power supply, and notice alternating current-direct current recognition unit carries out alternating current-direct current type identification；It is no
Then, judge that power supply to be identified for no-voltage power supply, notifies alternating current-direct current recognition unit without alternating current-direct current type identification.
14. device as claimed in claim 8, which is characterized in that the alternating current-direct current recognition unit specifically includes:
Voltage is lifted circuit, is lifted for the supply voltage to power supply to be identified；
Voltage A/D sample circuit is sampled for the supply voltage to power supply to be identified with lifting voltage；
Identification module, for by the power supply to be identified of voltage A/D sample circuit each sampled point obtained in predetermined period
Supply voltage A/D sampled value is compared with lifting voltage A/D sampled value, such as the power supply electricity of each sampled point in the predetermined period
Pressure A/D sampled value is all larger than or is respectively less than lifting voltage A/D sampled value, then power supply to be identified is DC power supply, if existing simultaneously
The case where supply voltage A/D sampled value is larger and smaller than lifting voltage A/D sampled value, then power supply to be identified is AC power source, if
The supply voltage A/D sampled value of each sampled point is equal to lifting voltage A/D sampled value in the predetermined period, then power supply to be identified
For no-voltage power supply.
15. a kind of AC/DC universal type transfer switch, including the control device as described in any one of claim 8~14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710009909.7A CN106532923B (en) | 2017-01-06 | 2017-01-06 | The control method and device of AC/DC universal type transfer switch |
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| CN201710009909.7A CN106532923B (en) | 2017-01-06 | 2017-01-06 | The control method and device of AC/DC universal type transfer switch |
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| CN106532923A CN106532923A (en) | 2017-03-22 |
| CN106532923B true CN106532923B (en) | 2019-10-29 |
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| CN107666305B (en) * | 2017-10-30 | 2023-10-03 | 杭州乾龙电器有限公司 | Intelligent switch |
| CN109525036B (en) * | 2018-11-06 | 2021-12-07 | 中国联合网络通信集团有限公司 | Method, device and system for monitoring mains supply state of communication equipment |
| CN109270383B (en) * | 2018-11-08 | 2021-01-05 | 国网江西省电力有限公司电力科学研究院 | Non-invasive charging pile automatic detection method |
| CN112649658A (en) * | 2020-12-10 | 2021-04-13 | 珠海格力电器股份有限公司 | Detection method and device for alternating current-direct current micro-grid system and storage medium |
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