CN109313460A - AC power adjuster - Google Patents
AC power adjuster Download PDFInfo
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- CN109313460A CN109313460A CN201680086601.6A CN201680086601A CN109313460A CN 109313460 A CN109313460 A CN 109313460A CN 201680086601 A CN201680086601 A CN 201680086601A CN 109313460 A CN109313460 A CN 109313460A
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
- G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
- G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
- G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/02—Measuring effective values, i.e. root-mean-square values
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
Abstract
A kind of AC power adjuster, it has the function of the output voltage for carrying out the control to the power supply of load by phase controlling and surveying oriented load supply or the virtual value for exporting electric current, it has: determination part, in the measurement of defined sampling timing to the output voltage of load supply or the instantaneous value of output electric current；Virtual value calculation part, the instantaneous value based on measurement calculate output voltage or export the virtual value of electric current；Correction unit corrects the difference of the offset based on the trigger point in phase controlling and the sampled point for measuring the instantaneous value, more accurately measures the virtual value of output voltage or output current value as a result,.
Description
Technical field
The present invention relates to the exchanges that the control to the power supply from AC power source of load is carried out by phase controlling
Power regulator.
Background technique
The voltage (virtual value) of commercial ac power source is that defined value (such as 200V) electrically sets various in contrast
In standby (load), there are the equipment that necessary electric power changes according to action state, therefore, utilize adjustment commercial ac power source
Voltage and by its to load supply AC power adjuster.
In this power regulator, as its control method, there are phase control mode, time-division control mode, amplitude controlling side
Formula etc..
About these control modes, disclosed in patent document 1 related phase control mode to the output voltage of load or defeated
The prior art of the measurement of the virtual value of electric current out.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2012-178030 bulletin
Summary of the invention
The technical problems to be solved by the invention
For the measurement to the virtual value of the output voltage or output electric current of load supply of AC power adjuster,
The measured value (AD conversion instantaneous value) of the instantaneous value i.e. voltage or electric current that obtain based on the sampling period is obtained in one control period,
Output voltage is calculated based on the measured value or exports the virtual value of electric current.
Fig. 3 is the figure for the calculating for illustrating the virtual value of the output voltage, and the waveform in figure is indicated voltage value progress square
1 control periodic quantity (half period of power supply measures) of resulting value.Here, to put it more simply, to carry out 10 samplings in 1 control period
For (each sampled point is periodically indicated shown in chain-dotted line).The virtual value of output voltage is equivalent to the Trigger Angle of the waveform in figure
The square root of the area of range.As actual device, based on the waveform in each instantaneous value calculating figure that sampled point obtains
The approximation of area calculates virtual value by taking its square root.In addition, Trigger AngleRefer to the electric power control of thyristor etc.
Value of the time of element switches processed relative to the ratio of the time in 1 control periodElectric control member in this
The time that part is connected referred in the control period, to the zero point (cut off) of the control end cycle after power control component connection
Time.
Here, previous, sampled point is determined on the basis of zero crossing.Therefore, as shown, generating sampled point and corresponding with Trigger Angle
The inconsistent situation in trigger point.In this case, the part (difference of trigger point and sampled point) of the shade of diagram, which becomes, misses
Poor factor.
Also such as figure it will be appreciated that because the area of the both ends part of waveform is small, in Trigger Angle close to 1 (100%) or 0
(0%) in the case where, the error component is small, but Trigger Angle be 0.5 (50%) nearby in the case where, the error component increase.
In addition, during the offset of trigger point and sampled point is 0~sampling period, if offset close to the sampling period,
Above-mentioned error component maximizes.
This error component precision according to required by as device, becomes the problem of cannot ignoring.
In view of the above subject, the present invention relates to the power supply from AC power source carried out by phase controlling to load
Control AC power adjuster, and it is an object of the present invention to provide a kind of can more accurately measure output voltage or export having for electric current
The AC power adjuster of valid value.
Technical teaching for solving the problem was
(structure 1)
A kind of AC power adjuster has and carries out the control to the power supply of load by phase controlling and measure to institute
It states the output voltage of load supply or exports the function of the virtual value of electric current, which is characterized in that have: determination part is sampling
Timing measurement is to the output voltage of the load supply or the instantaneous value of output electric current；Virtual value calculation part is based on determining
The instantaneous value calculate output voltage or export electric current virtual value；And correction unit, to based on the touching in phase controlling
The difference sent out point and measure the offset of the sampled point of the instantaneous value is corrected.
(structure 2)
According to AC power adjuster described in structure 1, which is characterized in that the sampled point is determined as and institute by the correction unit
It is synchronous to state trigger point.
(structure 3)
According to AC power adjuster described in structure 2, which is characterized in that keep the sampled point preparatory from trigger point delay
The amount of the ampleness value of setting.
(structure 4)
The AC power adjuster according to any one of structure 1~3, which is characterized in that the virtual value calculation part passes through
Ladder approximation is executed based on the instantaneous value determined to calculate, and calculates the output voltage or exports the virtual value of electric current.
(structure 5)
According to AC power adjuster described in structure 4, which is characterized in that carried out based on following numerical expression through the ladder approximation
Calculate the calculating of the virtual value of the output voltage carried out.
[numerical expression 1]
EeIndicate the virtual value of the output voltage, Em、En、EiIndicate the instantaneous value of the output voltage, wherein EmIndicate tight
Then the measurement voltage value after triggering, EnIndicate the instantaneous of the last voltage determination point in the control period in virtual value measurement
Voltage value, EiIndicate EmTo EnDuring arbitrary measuring point instantaneous voltage value, n indicates the sampling time of the half period of power supply
Number, m and Δ θ are the value calculated by numerical expression below (numerical expression 2, numerical expression 3) respectively.In following numerical expressionIt is Trigger Angle,
This, be to connect ratio (ratio of the time that the power control component of thyristor etc. is connected relative to the time in 1 control period)
Premise,
[numerical expression 2]
[numerical expression 3]
Invention effect
AC power adjuster according to the present invention can correct based on the trigger point in phase controlling and measure instantaneous value
The difference of offset of sampled point therefore can more accurately measure the virtual value of output voltage or output current value.
Detailed description of the invention
Fig. 1 is the schematic block diagram for indicating the structure of AC power adjuster of embodiments of the present invention.
Fig. 2 is the flow chart for indicating the outline of processing movement of the invention of the AC power adjuster in relation to embodiment.
Fig. 3 is the figure for the waveform for indicating to have carried out voltage value square.
Fig. 4 is the explanatory diagram for comparing the error of the present invention and existing way.
Fig. 5 is for illustrating that ladder approximation and rectangle are approximately schemed.
Specific embodiment
Hereinafter, illustrating embodiments of the present invention referring to attached drawing.In addition, the following embodiments and the accompanying drawings is that have to the present invention
Mode when body, does not limit the invention within the scope of this.
Fig. 1 is the block diagram for indicating the outline of the structure of AC power adjuster of embodiments of the present invention.Present embodiment
AC power adjuster 100 is the AC power adjuster that the control to the power supply of load is carried out by phase controlling, base
In the targeted loads rate (0~1 (0%~100%)) from the input (not shown) of the thermoregulator as external device (ED), carry out from
The control of the power supply of 3 pairs of the AC power source heaters as load 2.
The AC power adjuster 100 of present embodiment has:
Target input processing portion 110 is controlled, based on the targeted loads rate from thermoregulator imparting (not shown), calculating is used for
The Trigger Angle of phase controlling
Thyristor phase control division 120 is based on Trigger AngleControl thyristor 130；
Thyristor 130, the trigger signal exported by thyristor phase control division 120 is to from AC power source 3 to the electricity of load 2
Power supply is switched；
Current transformer 140；
A/D conversion timing interrupt processing portion 150；
Zero point interrupt processing portion 160.
In addition, Trigger Angle refer to from make thyristor etc. control AC power semiconductor element connect timing i.e. trigger point to this
The section of the 0V point of the alternating voltage of element cut-off, half period relative to alternating voltage ratio.
A/D conversion timing interrupt processing portion 150 has:
A/D conversion timing control unit 151 carries out the processing such as control of sampling timing；
A/D converter section 152, the output voltage A/D conversion 1521 of A/D conversion will be carried out to the output voltage values of load 2 by having
The output electricity of A/D conversion is carried out to the output (voltage value) of the current transformer 140 of the output electric current of load 2 with self-test in future
Flow A/D conversion 1522；
Square value cumulative unit 153 by the instantaneous value progress square of the voltage (or electric current) obtained by A/D converter section 152 and is tired out
The processing of meter.
A/D conversion timing control unit 151 as by control sampling timing come to based in phase controlling trigger point and measurement
The corrected correction unit of the difference of the offset of the sampled point of above-mentioned instantaneous value plays a role.
In addition, output voltage A/D conversion 1521 (or output electric current A/D conversion 1522) is as from A/D conversion timing control unit
The determination part that the sampling timing of 151 instructions surveys the instantaneous value for the output voltage (or output electric current) that oriented load 2 supplies, which plays, to be made
With.
Zero point interrupt processing portion 160 has:
Zero point test section 161 detects the zero crossing of AC power source 3；
Square aggregate-value storage unit 162 stores the value calculated by square value cumulative unit 153；
Virtual value calculation part 163, based on be stored in a square value for aggregate-value storage unit 162, i.e. to output voltage (or output electricity
Stream) instantaneous value carry out it is square accumulative go out a value, the output electricity supplied to load 2 is calculated to each control period (each zero point)
The virtual value of pressure (or output electric current).
In addition, above-mentioned each structure can be made up of respectively special circuit etc. with hardware, it can also be in microcomputer etc.
It is implemented in software on general circuit.
The AC power adjuster 100 for having the present embodiment of the above structure passes through to based on the triggering in phase controlling
The difference of the offset of the sampled point of point and measurement instantaneous value is corrected, and more accurately measures output voltage (or output electric current)
Virtual value.
As described above, previous, sampled point with trigger point is which is periodically unrelated, and on the basis of zero crossing based on the sampling period come
It determines (if power cycle and sampling period are unchanged, sampled point is fixed).Therefore, as shown in figure 3, substantially solid
Offset can be generated between the trigger point of fixed each sampled point and variation, the dash area of diagram becomes error component.Sampling period
It was a kind of company in the past aiming at the problem that above-mentioned this error component therefore during substantially short (below 100 μ seconds degree)
Realize the state being all not present.But by figure it is understood that being such case after and then sampled point in trigger point
Under, the offset of trigger point and sampled point maximizes, and near the center of waveform in the case where (Trigger Angle is 0.5 or so),
The area of dash area, that is, margin of error maximizes.The control of higher precision is carried out in AC power adjuster 100, it is this
Error becomes the value that cannot ignore.
The AC power adjuster 100 of present embodiment can reduce the influence of this error component, more accurately measurement output
The virtual value of voltage (or output electric current).Specifically, by being that synchronous with trigger point (sampled point is immediately by sampled point control
After trigger point), minimize the error component of the offset based on trigger point and sampled point.
The approximate calculation mode calculated virtual value of the invention is illustrated.
Firstly, as precondition, it is triggered using thyristor and the point connected is trigger point, with the trigger point and through phase controlling
Half period (half period of power supply) end zero point phase difference be Trigger AngleWherein, Trigger AngleTo indicate opposite
In the numerical value of the ratio of the cycle T of half period.Therefore,As described above, adopting the measurement timing of instantaneous voltage i.e.
Sampling point is synchronous with trigger point, implements the survey of the instantaneous voltage after (or before it) it by the n/mono- of the cycle T of half period
It is fixed.That is, the sampling period is T/n.
As a result, the measuring point (sampled point) of the instantaneous voltage of the half period through phase controlling is θ1~θnCount n.In addition, will
The zero point of the beginning of half period through phase controlling is set as θ0, the zero point of the end of half period is set as θn+1。θ0And θn+1It is instantaneous
Voltage is zero point, so being 0V, without carrying out the measurement of instantaneous voltage.In addition, trigger point is set as θm, by the instantaneous electricity of the point
Pressure is set as Em。
At this point, the phase angle of trigger pointBy using measuring intervalIt is resulting divided by measuring interval T/n
It is worth, casts outDecimal point the following value (the Gauss symbol for meaning to cast out is used in formula below) 4 table of numerical expression
Show.
[numerical expression 4]
Here, if there are trigger point during being set as (m-1) from the zero point of beginning to measuring interval T/n times and m times,
Then become numerical expression 5.
[numerical expression 5]
In addition, if writing out the general formula (θ of sampled point using the Δ θ defined by numerical expression 6i), then become numerical expression 7.
[numerical expression 6]
[numerical expression 7]
Here, i is the integer of 1≤i≤n range.
Here, if the function of voltage is set as f (θ), the voltage E of each instantaneous voltage measuring pointiAs numerical expression 8.
[numerical expression 8]
I is the integer of 1≤i≤n range, but in 1≤i≤m-1, and thyristor cut-off, therefore, the voltage of measuring point become 0,
Therefore, it is omitted in power system calculation below, virtual value calculate.
It is calculated according to above instantaneous voltage measured value based on ladder approximation to calculate with Trigger AngleCarry out phase controlling
When the approximate expression of average power of half period be numerical expression 9, as numerical expression 10 if being summarized.
[numerical expression 9]
[numerical expression 10]
Here, En+1It is the instantaneous voltage of the zero point of the end of half period, therefore, En+1=0.In addition, because PR=Ee 2/ R,
So EeGeneral formula become numerical expression 11 accordingly.
[numerical expression 11]
Numerical expression 11 is to execute and ladder approximation calculates to be used to calculate output electricity by the instantaneous value based on the voltage measured
The general formula of the virtual value of pressure.By by sampled point control be it is synchronous with trigger point, carry out based on ladder approximation calculating calculating, by
This, can more accurately measure the virtual value of output voltage.
In addition, if n is set as big value, En 2With EeCompared to very small value is become, therefore, relative to necessary
Measurement accuracy be very small value in the case where omitted, also can be set to numerical expression 12.
[numerical expression 12]
Then, the calculating of the virtual value of the output voltage of the AC power adjuster 100 of present embodiment is illustrated based on Fig. 2
The outline of processing.
Fig. 2 is the flow chart for indicating the outline of processing of the virtual value for calculating output voltage, passes through step 201~step
210 processing calculates the virtual value of the output voltage of half period (half period of power supply).
Firstly, trigger point (step 201) is obtained from thyristor phase control division 120 in A/D conversion timing control unit 151,
Sampled point is determined as (step 202) synchronous with trigger point.So that in Fig. 3, trigger point and sampled point become synchronous (sampled point
After and then trigger point) mode determine sampling timing, the point on the basis of the timing, with before and after it press the sampling period
The mode for configuring each sampled point determines each sampled point.In addition, substantially without being sampled before trigger point, it therefore, can also
To set sampled point after and then trigger point, sampled point is set as by the sampling period later.
In step 203 then, discriminate whether to reach after and then trigger point sampled point (in step 201 with triggering
The synchronous sampled point of point), in the case where reaching the sampled point after and then trigger point, step 204 is shifted to, carrying out will be at this
Moment substitutes into variable E by the output voltage instantaneous value that output voltage A/D converter section 1521 obtains1Processing and the generation in variable S
Enter the processing of 0 (initialization of S).In addition, the initial stageization for S is handled, can also be carried out in its pervious any timing.
Step 205 then~step 206 circular treatment is the place for discriminating whether to reach each sampled point or zero crossing
Reason.
In the case where reaching sampled point, by variable E1Value substitute into variable E2Afterwards, carry out by the moment from output voltage
The output voltage instantaneous value that A/D converter section 1521 obtains substitutes into variable E1Processing (step 206: being → step 207).As a result,
The numerical value substitution variable E on the basis of the value on the trapezoidal both sides needed for ladder approximation calculates will be become1And E2。
In step 208, in square value cumulative unit 153, carry out the instantaneous value that voltage is calculated by by ladder approximation square
The area is simultaneously carried out accumulative processing by waveform (Fig. 3), 1 measurement section area.That is, by E1 2And E2 2It is added, will add up
Value is multiplied with the sampling period (T/n) and divided by 2, and resulting value (is passed through the accumulative area for calculating 1 measurement section of ladder approximation
Value) it is accumulative with variable S.In addition, variable S is stored in a square aggregate-value storage unit 162.
Based on step 205~step 206 circular treatment, when each sampled point arrives every time, step 207~step 208 is executed
Processing, as a result, by the instantaneous value of voltage square waveform area (i.e. integrated value) approximation substitute into variable S.
In the case where the zero crossing differentiated by zero point test section 161 arrives, carry out square of the instantaneous value of voltage
Waveform final measurement section area and variable S it is accumulative, and be stored in a square processing for aggregate-value storage unit 162
(step 205: being → step 209).
As described above, the sampled point in present embodiment is synchronous with trigger point, not on the basis of zero passage, therefore, final measurement
Section is different from the sampling period (can also have identical situation).Final measurement section indicates that (Δ θ is based on numerical expression by Δ θ/n
6), and in zero crossing, voltage value (instantaneous value) is also zero certainly, therefore, by E1 2With 02It is added, will add up value multiplied by Δ θ/n simultaneously
Divided by 2, divisor and variable S are added up.
Finally, carrying out in virtual value calculation part 163 based on being stored in square S of aggregate-value storage unit 162 and calculate their square
Thus root calculates the virtual value E of output voltageeProcessing (step 210).
By above processing, (step 201~step 210) calculates the effective of the output voltage of half period (half period of power supply)
Value, by repeating the processing by the half period, (step 201~step 210) calculates the virtual value of the output voltage of each half period.
In addition, in the explanation of the flow chart based on Fig. 2, and the above explained numerical expression 11 of indirect use calculates virtual value
Ee, but can be defined by process content, it is based essentially on the calculating of numerical expression 11.(it also can be set to and record each measured value (instantaneous value),
Directly virtual value E is calculated using numerical expression 11eProcessing.)
Fig. 4 is to say for comparing the virtual value that calculates respectively in the present invention and existing way relative to the error of theoretical value
Bright figure.
The graph representation in the left side of figure applies an example in the case where the present invention, X '1~X '9Indicate each sampled point.That is, will adopt
Sample period tau is set as 1/the 10 of the half period of power supply (in addition, the X ' in Fig. 41~X '9And X1~X9Indicate E2(each sampling timing
Voltage instantaneous value square)).In this embodiment, X '6It is confirmed as, by it on the basis of point, to sample week synchronous with trigger point
Phase τ determines each sampled point.If by the amplitude in last sectionIt is indicated with Δ θ, is then Δ θ/n.
On the other hand, the case where showing under same situation using current method be right side chart.Existing
In method, keep sampled point synchronous with zero crossing, as a result, in trigger point and sampled point X6Between generateOffset.That is, energy
It is enough to postpone from trigger pointSampled point X6Start to detect output voltage, from trigger point to X6Between section be cannot detect
During, become error component.
The chart of the upside in the center of figure is the figure that the error relative to theoretical value is shown for the present invention and existing way
Table, the chart of central downside are the charts that error is carried out to pictorialization relative to the ratio of theoretical value.
From in figure it is also to be understood that in existing way, with the offset of trigger point and sampled pointIncrease, error also increases
Greatly, with offsetClose to sampling period τ, error is maximized.
In contrast, in the present invention, by scheming also, it is apparent that error is suppressed to very small value (only ladder approximation
The error that approximation generates), the error generated in existing way is greatly improved.
As described above, AC power adjuster 100 according to the present embodiment, because can correct based in phase controlling
Trigger point and measurement instantaneous value sampled point offset difference, so the effective of output voltage can more accurately be measured
Value.
In addition, AC power adjuster 100 according to the present embodiment can because being calculated using ladder approximation
Further decrease error.
Ask instantaneous value square waveform integrated value when, using in the approximate situation of rectangle, as shown in (a) of Fig. 5, phase
The error of the integrated value (area) of waveform is increased.As shown in (a) of Fig. 5, in the case where half period amount all integral
(in the case that i.e. Trigger Angle is 1), before and after peak value, error offsets, and error as a whole almost disappears, but when triggering
When angle is less than 1, the error that cannot be offseted is generated, in the case where Trigger Angle is 0.5 or so, which becomes maximum.
In contrast, as shown in (b) of Fig. 5, by using ladder approximation, it can reduce error.
In addition, in the present embodiment, being illustrated in case where the virtual value for measuring output voltage, but surveying
Surely it (wherein, can also be measured using current transformer 140 with the application of same concept in the case where exporting the virtual value of electric current
It under the case where current instantaneous value etc., needs to consider the phase delay based on circuit characteristic or shifts to an earlier date).
In the present embodiment, by sampled point is determined as it is synchronous with trigger point by way of carry out based on phase controlling
Under trigger point and measurement instantaneous value sampled point offset difference (dash area of Fig. 3) correction for said
It is bright, but can also be corrected by other methods.For example, it can be measurements itself to pass through the existing mode (right side of Fig. 4
Figure) carry out, carry out relative to thus obtained value subtract based on measure instantaneous value sampled point offset difference (Fig. 3
Dash area) correction etc..
In the present embodiment, by also to last measurement section (in the chart in the left side of Fig. 4Section)
Integrated, for finding out more accurate value, but from the chart in the left side of Fig. 4 it will also be appreciated that because ofSection
Area is relatively small, even if so also can be omitted in the case where not adding up the part and also can obtain necessary precisionThe accumulative of section (omit the step 209) of Fig. 2, realize the reduction of calculation amount.
It is not limited in addition, " being determined as sampled point synchronous with trigger point " in the present invention refers to strictly to make to adopt
After sampling point is and then trigger point, but indicate the substantial sampled point situation synchronous with trigger point.
For example, the increase ratio trigger point of the voltage in load slightly postpones or occurs feelings as deviation according to circuit characteristic etc.
Under condition, need to make sampled point and trigger point after the rising of and then voltage simultaneously, sampled point advances to.This is
In order to keep the measurement of voltage reliable.In this case, for example, preset voltage rising delay amount or deviation amount
Worst-case value makes sampled point postpone ampleness value from trigger point as ampleness value, but its with sampled point the synchronous phase on the basis of trigger point
Than there is no changing, as idea of the invention, such case also complies with " being determined as sampled point synchronous with trigger point ".
Symbol description
100 AC power adjusters
130 thyristors
150 A/D conversion timing interrupt processing portions
151 A/D conversion timing control units
152 A/D converter sections
153 square value cumulative unit
160 zero point interrupt processing portions
161 zero point test sections
162 squares of aggregate-value storage units
163 virtual value calculation parts
2 loads
3 AC power sources
Claims (5)
1. a kind of AC power adjuster, have by phase controlling carry out the control to the power supply of load and measure to
The output voltage of the load supply or the function for the virtual value for exporting electric current, which is characterized in that have:
Determination part, in sampling timing measurement to the output voltage of the load supply or the instantaneous value of output electric current；
Virtual value calculation part calculates output voltage based on the instantaneous value determined or exports the virtual value of electric current；And
Correction unit carries out the difference based on the trigger point in phase controlling and the offset for the sampled point for measuring the instantaneous value
Correction.
2. AC power adjuster according to claim 1, which is characterized in that
The sampled point is determined as synchronous with the trigger point by the correction unit.
3. AC power adjuster according to claim 2, which is characterized in that
The sampled point is set to postpone the amount of preset ampleness value from the trigger point.
4. AC power adjuster described in any one of claim 1 to 3, which is characterized in that
The virtual value calculation part is calculated by executing ladder approximation based on the instantaneous value determined, calculates the output electricity
The virtual value of pressure or output electric current.
5. AC power adjuster according to claim 4, which is characterized in that
The calculating for the virtual value that the output voltage carried out is calculated by the ladder approximation is carried out based on following numerical expression,
[numerical expression 1]
EeIndicate the virtual value of the output voltage, Em、En、EiIndicate the instantaneous value of the output voltage, wherein EmIt indicates immediately
Triggering after measurement voltage value, EnIndicate the instantaneous electricity of the last voltage determination point in the control period in virtual value measurement
Pressure value, EiIndicate EmTo EnDuring arbitrary measuring point instantaneous voltage value, n indicate power supply half period sampling number,
M and Δ θ is the value calculated by numerical expression below respectively,
In above-mentioned numerical expressionIt is Trigger Angle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/076594 WO2018047290A1 (en) | 2016-09-09 | 2016-09-09 | Ac power conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109313460A true CN109313460A (en) | 2019-02-05 |
| CN109313460B CN109313460B (en) | 2021-05-25 |
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ID=61562709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680086601.6A Active CN109313460B (en) | 2016-09-09 | 2016-09-09 | AC power regulator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6666575B2 (en) |
| KR (1) | KR102175439B1 (en) |
| CN (1) | CN109313460B (en) |
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- 2016-09-09 WO PCT/JP2016/076594 patent/WO2018047290A1/en active Application Filing
- 2016-09-09 CN CN201680086601.6A patent/CN109313460B/en active Active
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| Publication number | Publication date |
|---|---|
| JP6666575B2 (en) | 2020-03-18 |
| KR102175439B1 (en) | 2020-11-06 |
| CN109313460B (en) | 2021-05-25 |
| KR20180132856A (en) | 2018-12-12 |
| WO2018047290A1 (en) | 2018-03-15 |
| JPWO2018047290A1 (en) | 2019-04-18 |
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