CN109639262A - The effective value calculating method of thyristor interrupted current and device - Google Patents
The effective value calculating method of thyristor interrupted current and device Download PDFInfo
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- CN109639262A CN109639262A CN201811541638.0A CN201811541638A CN109639262A CN 109639262 A CN109639262 A CN 109639262A CN 201811541638 A CN201811541638 A CN 201811541638A CN 109639262 A CN109639262 A CN 109639262A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0027—Measuring means of, e.g. currents through or voltages across the switch
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Abstract
The invention discloses a kind of effective value calculating method of thyristor interrupted current and devices, this method comprises: the Trigger Angle of detection thyristor, wherein, Trigger Angle is added ac signal on thyristor, trigger signal moment corresponding phase angle is received in thyristor, trigger signal is the signal for triggering thyristor and generating conducting electric current；In the case where detecting that the Trigger Angle of thyristor changes, the current effective value in a period before receiving trigger signal in the turn on thyristors period is calculated according to virtual Trigger Angle, and the current effective value received in a period after trigger signal in the turn on thyristors period is calculated according to the Trigger Angle of thyristor, wherein, virtual Trigger Angle is equal to the angular frequency of added ac signal and the product of time on thyristor.The present invention can realize the smooth transition of thyristor interrupted current virtual value in the dynamic changing process of IGBT group angle.
Description
Technical field
The present invention relates to thyristor field more particularly to a kind of effective value calculating methods of thyristor interrupted current and device.
Background technique
This part intends to provides background or context for the embodiment of the present invention stated in claims.Description herein
Recognize it is the prior art not because not being included in this section.
Thyristor can work as power electronic device under the conditions of high voltage, high current.With general diode phase
Than thyristor has controllable unilateal conduction, it can controls conducting electric current.The pressure resistance of single thyristor is inadequate, but
By way of more Thyristors in series, high pressure, the Current Control Technology of super-pressure may be implemented.Due to the thyristor course of work
It can control, have and high current (voltage) effect is controlled with low current (voltage), and there is small in size, light-weight, low in energy consumption, effect
The advantages that rate is high, switch is rapid, is widely used in controlled rectification, AC voltage adjusting, contactless electronic beam switch, inversion, light modulation, tune
In the electronic circuits such as pressure, speed regulation and frequency conversion.
Control electric current by thyristor, there is a problem of one it is universal, flow through the electric current of thyristor be it is interrupted, no
It is continuous sine wave.Due to this characteristic, cause to calculate the virtual value for flowing through thyristor current flows, with typical sine-wave current
Different, with the difference at IGBT group angle, the delay of calculating current virtual value is also different, and longest needs 1 are complete
The network voltage period, i.e. 20ms.
Currently, the prior art mainly uses the following two kinds mode to calculate thyristor interrupted current virtual value:
First way is defined using RMS formula, seeks root-mean-square value of the interrupted current in 20ms, directly to obtain
The virtual value of interrupted current.The historical data of specific body, digital processing chip storage inside 20ms (is equivalent to a data storage
Window), a new data is collected every time, then is defined using RMS formula, calculate the virtual value of an interrupted current.For reality
Existing storage resource recycles, and acquires a new data every time, then needs to discard historical data, and new data occupies old number
According to storage location.This mode is caused calculated result slow, is had very big prolong due to the data of necessary continuous acquisition 20ms
When (maximum 20ms delay).For the system for current Quick Acquisition and quickly controlled, such algorithm delay is can not to bear
It receives, so that the timeliness that entire control system loses, so that set task can not be rapidly completed.Meanwhile this mode by
In the historical data that must store signal, occupy a large amount of storage resource, particularly with multiple signal sources acquisition, calculate be
System, will cause the waste of a large amount of memory sources.With the quickening of digit chip processing speed, storage resource and processing speed are occupied
Proportional increase, this is complete intolerable method.
The second way carries out signal period property extension and extension according to historical data, when new data reaches, directly cuts
Change to new data.This mode is the extension to first way, is still calculated without fundamentally solving quickly and effectively value
Problem.Simultaneously because using " directly switching method ", output result is caused to be jumped, introduces more unreasonable, difficulty
The abnormal data of reason.Especially when virtual value changes to 100% from 0%, the calculated result of the program will appear seriously
Mistake, used to affect subsequent signal.
Summary of the invention
The embodiment of the present invention provides a kind of effective value calculating method of thyristor interrupted current, to solve in the prior art,
Due to the dynamic change at IGBT group angle, so that the interrupted current virtual value being calculated occurs discontinuously, or even mutation
Technical problem, this method comprises: the Trigger Angle of detection thyristor, wherein Trigger Angle is added ac signal on thyristor,
Thyristor receives trigger signal moment corresponding phase angle, and trigger signal is the signal for triggering thyristor and generating conducting electric current；
In the case where detecting that the Trigger Angle of thyristor changes, thyristor is calculated in first time period according to virtual Trigger Angle
Current effective value, and current effective value of the thyristor in second time period is calculated according to the Trigger Angle of thyristor, wherein
Virtual Trigger Angle is equal to the angular frequency of added ac signal and the product of time on thyristor, and first time period is led for thyristor
A period before trigger signal is received in the logical period, second time period is that triggering letter is received in the turn on thyristors period
A period after number.
The embodiment of the present invention also provides a kind of effective value calculation apparatus of thyristor interrupted current, to solve the prior art
In, due to the dynamic change at IGBT group angle, so that the interrupted current virtual value being calculated occurs discontinuously, or even mutation
The technical issues of, which includes: detection unit, for detecting the Trigger Angle of thyristor, wherein Trigger Angle is institute on thyristor
Add ac signal, receives trigger signal moment corresponding phase angle in thyristor, trigger signal is that triggering thyristor generates
The signal of conducting electric current；Computing unit, in the case where detecting that the Trigger Angle of thyristor changes, according to virtual Trigger Angle
It calculates current effective value of the thyristor in first time period, and thyristor is calculated at second according to the Trigger Angle of thyristor
Between current effective value in section, wherein virtual Trigger Angle is equal to the angular frequency of added ac signal and time on thyristor
Product, first time period are that a period before trigger signal is received in the turn on thyristors period, and second time period is crystalline substance
A period after receiving trigger signal in brake tube turn-on cycle.
The embodiment of the present invention also provides a kind of computer equipment, to solve in the prior art, due to IGBT group angle
Dynamic change so that the interrupted current virtual value that is calculated occur it is discontinuous, or even the technical issues of mutation, including storage
Device, processor and storage on a memory and the computer program that can run on a processor, processor execution computer program
The Shi Shixian above-mentioned effective value calculating method of thyristor interrupted current.
The embodiment of the present invention also provides a kind of computer readable storage medium, to solve in the prior art, due to brilliant lock
The dynamic change of pipe Trigger Angle, so that the interrupted current virtual value being calculated occurs discontinuously, or even the technical issues of mutation,
Computer-readable recording medium storage has the computer program for executing the above-mentioned effective value calculating method of thyristor interrupted current.
In the embodiment of the present invention, by detecting the Trigger Angle of thyristor, change in the Trigger Angle for detecting thyristor
In the case where, according to the virtual Trigger Angle that the angular frequency of ac signal added on thyristor and time obtain, calculate thyristor
The current effective value in a period before receiving trigger signal in turn-on cycle, and calculated according to the Trigger Angle of thyristor
Thyristor receives the Trigger Angle of trigger signal, calculates in the turn on thyristors period and receives a period after trigger signal
Interior current effective value.
Through the embodiment of the present invention, it not only realizes and quickly calculates thyristor current flows virtual value, but also thyristor is existed
The current effective value that Trigger Angle variation front and back is calculated will not mutate, and realize a smooth transition.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is the effective value calculating method flow chart of a kind of thyristor interrupted current provided in the embodiment of the present invention；
Fig. 2 is a kind of thyristor schematic diagram provided in the embodiment of the present invention；
Fig. 3 is a kind of positive thyristor interrupted current waveform diagram provided in the embodiment of the present invention；
Fig. 4 is the interrupted current waveform diagram after a kind of IGBT group angle variation provided in the embodiment of the present invention；
Fig. 5 is interrupted current virtual value schematic diagram after a kind of IGBT group angle variation provided in the embodiment of the present invention；
Fig. 6 is a kind of positive turn on thyristors current range schematic diagram provided in the embodiment of the present invention；
Fig. 7 is a kind of positive thyristor for providing in the embodiment of the present invention according to virtual Trigger Angle calculating current virtual value
Conducting electric current range schematic diagram；
Fig. 8 is that a kind of positive thyristor provided in the embodiment of the present invention maintains the conducting electric current range of original electric current to illustrate
Figure；
Fig. 9 is a kind of negative sense turn on thyristors current range schematic diagram provided in the embodiment of the present invention；
Figure 10 be in the embodiment of the present invention a kind of negative sense thyristor for providing according to virtual Trigger Angle calculating current virtual value
Conducting electric current range schematic diagram；
Figure 11 is that a kind of negative sense thyristor provided in the embodiment of the present invention maintains the conducting electric current range of original electric current to show
It is intended to；
Figure 12 is a kind of positive and negative thyristor schematic diagram provided in the embodiment of the present invention；
Figure 13 is a kind of positive and negative thyristor interrupted current waveform diagram provided in the embodiment of the present invention；
Figure 14 is a kind of positive and negative turn on thyristors current range schematic diagram provided in the embodiment of the present invention；
Figure 15 is that a kind of positive and negative thyristor provided in the embodiment of the present invention maintains the conducting electric current range of original electric current to show
It is intended to；
Figure 16 be in the embodiment of the present invention a kind of positive and negative thyristor for providing according to virtual Trigger Angle calculating current virtual value
Conducting electric current range schematic diagram；
Figure 17 is a kind of different Trigger Angle turn on thyristors current effective value matched curves provided in the embodiment of the present invention
Schematic diagram；
Figure 18 is the effective value calculating method flow chart of a kind of positive thyristor interrupted current provided in the embodiment of the present invention；
Figure 19 is the effective value calculation apparatus schematic diagram of a kind of thyristor interrupted current provided in the embodiment of the present invention.
Specific embodiment
Understand in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, with reference to the accompanying drawing to this hair
Bright embodiment is described in further details.Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
A kind of effective value calculating method of thyristor interrupted current is provided in the embodiment of the present invention, Fig. 1 is that the present invention is implemented
The effective value calculating method flow chart of a kind of thyristor interrupted current provided in example, as shown in Figure 1, this method includes following step
It is rapid:
S101 detects the Trigger Angle of thyristor, wherein Trigger Angle is added ac signal on thyristor, in thyristor
Trigger signal moment corresponding phase angle is received, trigger signal is the signal for triggering thyristor and generating conducting electric current；
S102 calculates thyristor according to virtual Trigger Angle in the case where detecting that the Trigger Angle of thyristor changes
Current effective value in first time period, and electricity of the thyristor in second time period is calculated according to the Trigger Angle of thyristor
Flow virtual value, wherein virtual Trigger Angle is equal to the angular frequency of added ac signal and the product of time on thyristor, when first
Between section be to receive a period before trigger signal in the turn on thyristors period, second time period is the turn on thyristors period
A period after inside receiving trigger signal.
Optionally, in the case where the Trigger Angle that thyristor is not detected changes, according to the Trigger Angle meter of thyristor
Calculate the current effective value of thyristor.
It should be noted that thyristor is a kind of half control component namely thyristor can be triggered conducting, but it is closed
Disconnected is uncontrolled.Fig. 2 is a kind of thyristor schematic diagram provided in the embodiment of the present invention, as shown in Fig. 2, being added by external
In one trigger signal to the trigger signal pin K of thyristor；When there is positive voltage at thyristor both ends, (i.e. P point voltage is higher than N point electricity
Pressure) when, after inputting a trigger signal to the thyristor, which will be connected, and just have electric current and flow through the crystalline substance lock
Pipe.When there is positive voltage at thyristor both ends, if the thyristor will not be connected without trigger signal, electric current is not had and is flowed through
The thyristor.When thyristor both ends have negative voltage (i.e. N point voltage is higher than P point voltage), regardless of whether having trigger signal, not
It can make the turn on thyristors, there will not be electric current and flow through the thyristor.After turn on thyristors, just has electric current and flow through the crystalline substance lock
Pipe, corresponding electric current are also referred to as " conducting electric current ".When conducting electric current is 0 and thyristor both end voltage is negative voltage, brilliant lock
Pipe can automatically shut down and (also referred to as end), not by the control of external pin signal.
When thyristor both ends add sine voltage signal u (t)=sin (2 π f × t), the embodiment of the present invention is by brilliant lock
At the time of pipe pin K receives trigger signal Trig (t), the phase of the corresponding sine voltage signal, the referred to as triggering of thyristor
The π of angle α, α=Trig (t) × f × 2, wherein t is the time, and unit is the second；F is frequency, and unit is Hz.
For example, Fig. 3 is a kind of positive thyristor interrupted current waveform diagram provided in the embodiment of the present invention, such as Fig. 3
Shown, as IGBT group angle α ∈ [π, 2 π], thyristor both end voltage is negative, due to the characteristic (both ends of thyristor component
When voltage is negative, can not be connected), it is invalid working range when IGBT group angle α ∈ [π, 2 π] therefore, thus, this hair
Bright embodiment does not discuss the performance of thyristor in the range.When IGBT group angleWhen, thyristor can be had
Effect triggers and is formed conducting electric current, and electric current can continue to increase after conducting, brilliant after 2 π until just starting to reduce after π
Brake tube electric current be 0, and both end voltage be negative voltage when, can automatically shut down, therefore, thyristor existsAfter triggering,
It will be unable to automatically shut down, cause total system uncontrolled, and will lead to thyristor damage.Therefore, IGBT group angleWhen, it is a uncontrolled operating mode, not in the range of the embodiment of the present invention discusses.Work as IGBT group
AngleWhen, thyristor can effectively be triggered and be formed conducting electric current, and conducting electric current can be since turn-on instant
Increase, reach maximum value (peak value) when reaching π, then starts to decay to 0, after thyristor bears negative voltage automatically, brilliant lock
Pipe is automatically shut down.
Thus, as a kind of optional embodiment, the IGBT group angular region of research of the embodiment of the present invention isTurn on thyristors electric current is continuously 0 for some time, does not form continuous electric current (referred to as electric current " steamed bun
Wave "), the range that conducting electric current is not zero is [α, 2 π-α], when IGBT group angleWhen, turn on thyristors electric current
The maximum magnitude being not zero isπ/3 IGBT group angle α=2 shown in Fig. 3, the model that conducting electric current is not zero
Enclose for
Herein it should be noted that the instantaneous relationship between IGBT group moment t and turn on thyristors transient current i is full
The following formula of foot:
Fig. 4 is the interrupted current waveform signal after a kind of IGBT group angle provided in the embodiment of the present invention changes
Figure, as shown in figure 4, when IGBT group angle α from 100 ° change into 120 ° in the case where, thyristor Discontinuous Conduction electric current is being equal to
At the time of 0, for current instantaneous value, naturally switched the (switching of the current instantaneous value as shown in icon 401 in Fig. 4
Point), there is no any rush of current.But for the virtual value of thyristor Discontinuous Conduction electric current, it may appear that one non-
So that other control system can not work normally, or even there is serious failure in often big change and rush of current.Especially work as
A upper Trigger Angle isThe amplitude of corresponding conducting electric current is 100%, and next Trigger Angle is the width of the corresponding conducting electric current of π
Value is 0%, then corresponding rush of current value can reach 100%, this is the case where any one system all can not be handled normally.
Fig. 5 is interrupted current virtual value schematic diagram after a kind of IGBT group angle variation provided in the embodiment of the present invention,
As shown in figure 5, the Trigger Angle different for 2, corresponding conducting electric current virtual value is 2 different values.When Trigger Angle changes
When (100 ° are changed into 120 °), conducting electric current virtual value just will appear primary quickly change (as shown in icon 501 in Fig. 5
Current effective value switching point), and this change is one and quickly changes, and forms the impact of a current effective value, does not have completely
There is smooth transition.It will lead to other control system in this way, or abnormal or even nothing occur using the program of the current effective value
Method works normally.
Turn on thyristors current effective value is caused to be mutated in order to solve the problems, such as that IGBT group angle changes, the present invention is implemented
Example generates the virtual sinusoidal signal an of fundamental wave according to Trigger Angle；In the window that can modify Trigger Angle, then a virtual touching
It signals, according to the virtual sinusoidal signal of one Variable Amplitude of trigger signal dynamic generation, to realize quickly, efficiently, smoothly
The transition of interrupted current virtual value is realized on ground, has reached no-harass switch, is provided for other control system a kind of ideal
Detect signal.
As the first optional embodiment, when the thyristor in above-mentioned S101 and S102 is positive thyristor the case where
Under, the embodiment of the present invention calculates the current effective value of positive thyristor by following formula are as follows:
Wherein,For the first time period of positive thyristor；
For the second time period of positive thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
Fig. 6 is a kind of positive turn on thyristors current range schematic diagram provided in the embodiment of the present invention, as shown in fig. 6,
For positive thyristor, when Trigger Angle is α, the range that conducting electric current is not zero is: [α, 2 π-α].
Due toThen the range of 2 π-α is exactlyThe embodiment of the present invention exists as a result,Range
Interior, the conducting electric current of virtual one continuous positive thyristor, the conducting electric current is in [α, 2 π-α] range, with original conducting
Electric current is essentially equal, calculates positive turn on thyristors electric current according to the top half of positive thyristor current flows virtual value calculation formula
Virtual value.
Fig. 7 is a kind of positive thyristor for providing in the embodiment of the present invention according to virtual Trigger Angle calculating current virtual value
Conducting electric current range schematic diagram, as shown in fig. 7, andWithout real trigger signal, the embodiment of the present invention in range
Provide virtual Trigger Angle signal alphanewThe π of=t × f × 2, the conducting electric current of formation are calculated according to positive thyristor current flows virtual value
The lower half portion of formula calculates positive turn on thyristors current effective value.
Fig. 8 is that a kind of positive thyristor provided in the embodiment of the present invention maintains the conducting electric current range of original electric current to illustrate
Figure, as shown in figure 8,The triggering angle signal that positive thyristor receives is continued to remain toRemain original
Thyristor sinusoidal current is constant,In range, according to the upper half of positive thyristor current flows virtual value calculation formula
Part calculates positive turn on thyristors current effective value.
As second of optional embodiment, when the thyristor in above-mentioned S101 and S102 is negative sense thyristor the case where
Under, the embodiment of the present invention calculates the current effective value of negative sense thyristor by following formula are as follows:
Wherein,For the first time period of negative sense thyristor；
[π+α,2π],For the second time period of negative sense thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
Fig. 9 is a kind of negative sense turn on thyristors current range schematic diagram provided in the embodiment of the present invention, as shown in figure 9,
For negative sense thyristor, the range that conducting electric current is not zero is [π+α, 2 π] and [0, π-α] two parts.Figure 10 is the present invention
A kind of negative sense thyristor provided in embodiment according to the conducting electric current range schematic diagram of virtual Trigger Angle calculating current virtual value,
As shown in Figure 10, existIn range, negative sense IGBT group signal is not received, the embodiment of the present invention is according to virtual
Trigger signal αnewThe π of=t × f × 2 generates a conducting electric current, according to the lower half of negative sense thyristor current flows virtual value calculation formula
Part calculates negative sense turn on thyristors current effective value.Figure 11 is that a kind of negative sense thyristor provided in the embodiment of the present invention maintains
The conducting electric current range schematic diagram of original electric current, as shown in figure 11,In range, touching that negative sense thyristor is received
Hair angle signal continues to remain toMaintain original thyristor sinusoidal current constant, thereforeIn range, according to negative
Negative sense turn on thyristors current effective value is calculated to the top half of thyristor current flows virtual value calculation formula.
As the third optional embodiment, when the thyristor in above-mentioned S101 and S102 is positive negative crystal brake tube (as schemed
The positive thyristor 121 and negative sense thyristor 122 of reverse parallel connection shown in 12) in the case where, Figure 13 is to mention in the embodiment of the present invention
A kind of positive and negative thyristor interrupted current waveform diagram supplied.The embodiment of the present invention calculates positive and negative thyristor by following formula
Current effective value are as follows:
Wherein,[π+α,2π],The first time period of the negative crystal that is positive brake tube；
The second time period of the negative crystal that is positive brake tube；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
Figure 14 is a kind of positive and negative turn on thyristors current range schematic diagram provided in the embodiment of the present invention, such as Figure 14 institute
Show, for positive and negative thyristor, the range that conducting electric current is not zero is [α, 2 π-α], [π+α, 2 π] and [0, π-α] three parts.
Figure 15 is that a kind of positive and negative thyristor provided in the embodiment of the present invention maintains the conducting electric current range of original electric current to show
It is intended to, as shown in figure 15, maintains the range of original sinusoidal conducting electric current to merge positive and negative thyristor, a dimension will be obtained
Hold the range of original sinusoidal conducting electric current[π+α,2π],In these three current ranges, according to positive negative crystal lock
The top half of tube current virtual value calculation formula calculates positive and negative turn on thyristors current effective value, keeps tying with original calculating
Fruit is the same, has been compatible with original detection and calculation method.
Figure 16 be in the embodiment of the present invention a kind of positive and negative thyristor for providing according to virtual Trigger Angle calculating current virtual value
Conducting electric current range schematic diagram, as shown in figure 16, positive and negative thyristor do not receive triggering angle signal current range
WithIt is interior, positive and negative turn on thyristors electricity is calculated according to the lower half portion of positive and negative thyristor current flows virtual value calculation formula
Flow virtual value.
It should be noted that the embodiment of the present invention for IGBT group angular region outside at the time of, propose a kind of electric current
The approximating method of amplitude dynamically changeable, it may be assumed that
The match value under different IGBT group angles is calculated by above-mentioned formula, a song can be drawn out
Line, for instructing to actually use, according to the interrupted current song for the amplitude dynamically changeable that the electric current under different Trigger Angles is fitted
Line, as shown in figure 17.
By taking positive thyristor as an example, in the specific implementation process, the embodiment of the present invention also provides the implementation method stream of Figure 18
Cheng Tu, as shown in figure 18, after entering IGBT group turn on process, it is first determined whether receiving IGBT group angle, such as
Fruit current time is not equal to Trigger Angle α, then continuing waiting for；If current time is more than or equal to Trigger Angle, according to virtual touching
It sends out angle and calculates interrupted current virtual value, until positive thyristor reaches 2 π-α；If after reaching for 2 π-α moment, will maintain former
There is sinusoidal conducting electric current, continue the Trigger Angle received according to last time and carry out virtual value calculating, until positive thyristor reaches
Before；If reachedAfter moment, judge whether to receive new Trigger Angle.If not receiving new Trigger Angle, then by virtual one
A triggering angle signal calculates conducting electric current virtual value according to virtual Trigger Angle；If receiving new Trigger Angle, it is next to return to execution
A conducting process.
The effective value calculating method of interrupted current provided in an embodiment of the present invention, thyristor Discontinuous Conduction electric current, which may be implemented, to be had
The smooth transition of valid value, while former methodical current effective value impact is also avoided, simultaneously because using new fitting side
Method, the original method of the calculating ratio of interrupted current virtual value is quicker, provides for other control system and efficiently and effectively detects
Means.
A kind of effective value calculation apparatus of thyristor interrupted current is additionally provided in the embodiment of the present invention, such as following implementation
Example.Since the principle that the device solves the problems, such as is similar to the effective value calculating method of thyristor interrupted current, the reality of the device
The implementation for the method for may refer to is applied, overlaps will not be repeated.
Figure 19 is the effective value calculation apparatus schematic diagram of a kind of thyristor interrupted current provided in the embodiment of the present invention, is such as schemed
Shown in 19, which includes: detection unit 191 and computing unit 192.
Wherein, detection unit 191, for detecting the Trigger Angle of thyristor, wherein Trigger Angle is added exchange on thyristor
Electric signal receives trigger signal moment corresponding phase angle in thyristor, and trigger signal is that triggering thyristor generates electric conduction
The signal of stream；
Computing unit 192 is calculated in the case where detecting that the Trigger Angle of thyristor changes according to virtual Trigger Angle
Current effective value of the thyristor in first time period, and thyristor is calculated in second time period according to the Trigger Angle of thyristor
Interior current effective value, wherein virtual Trigger Angle is equal to the angular frequency of added ac signal and the product of time on thyristor,
First time period is to receive a period before trigger signal in the turn on thyristors period, and second time period is led for thyristor
A period after trigger signal is received in the logical period.
In an alternative embodiment, above-mentioned computing unit 192 is also used in the Trigger Angle hair that thyristor is not detected
In the case where changing, the current effective value of thyristor is calculated according to the Trigger Angle of thyristor.
As the first optional embodiment, above-mentioned thyristor is positive thyristor, then computing unit 192 is also used to lead to
Cross the current effective value that following formula calculates positive thyristor are as follows:
Wherein,For the first time period of positive thyristor；
For the second time period of positive thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
As second of optional embodiment, above-mentioned thyristor is negative sense thyristor, then computing unit 192 is also used to lead to
Cross the current effective value that following formula calculates negative sense thyristor are as follows:
Wherein,For the first time period of negative sense thyristor；
[π+α,2π],For the second time period of negative sense thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
As the third optional embodiment, above-mentioned thyristor is positive negative crystal brake tube, comprising: the forward direction of reverse parallel connection is brilliant
Brake tube and negative sense thyristor, then computing unit 192 is also used to calculate the current effective value of positive and negative thyristor by following formula are as follows:
Wherein,[π+α,2π],The first time period of the negative crystal that is positive brake tube；
The second time period of the negative crystal that is positive brake tube；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range is
ω indicates the angular frequency of added ac signal on thyristor；T indicates the time.
It additionally provides a kind of computer equipment in the embodiment of the present invention, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, processor is realized in above method embodiment when executing computer program appoints
It anticipates a kind of optional or preferred effective value calculating method of thyristor interrupted current.
A kind of computer readable storage medium is additionally provided in the embodiment of the present invention, computer-readable recording medium storage has
Execute the calculating of any one optional or preferred effective value calculating method of thyristor interrupted current in above method embodiment
Machine program.
To sum up, the embodiment of the invention provides a kind of new interrupted current calculation method, pass through real-time tracking Trigger Angle
Value, generates the virtual sinusoidal signal an of fundamental wave；In the window that can modify Trigger Angle, then a virtual trigger signal, root
According to the virtual sinusoidal signal of one Variable Amplitude of trigger signal dynamic generation, using the method for being fitted, approaching interrupted current, constantly more
The new interrupted current virtual value closest to practical Trigger Angle, to realize the smooth transition and fastly of interrupted current virtual value calculating
Speed calculates, and provides timely and effectively feedback signal for other control system.Solves the prior art through the embodiment of the present invention
In, due to IGBT group angle dynamic change, cause the virtual value of thyristor interrupted current calculate will appear it is serious after and
The problem of inaccuracy.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (12)
1. a kind of effective value calculating method of thyristor interrupted current characterized by comprising
Detect the Trigger Angle of thyristor, wherein the Trigger Angle is added ac signal on the thyristor, in the brilliant lock
Pipe receives trigger signal moment corresponding phase angle, and the trigger signal is the letter that the triggering thyristor generates conducting electric current
Number；
In the case where detecting that the Trigger Angle of the thyristor changes, the thyristor is calculated according to virtual Trigger Angle and is existed
Current effective value in first time period, and the thyristor is calculated in second time period according to the Trigger Angle of the thyristor
Interior current effective value, wherein the virtual Trigger Angle be equal to the thyristor on added ac signal angular frequency and when
Between product, the first time period is to receive a period before trigger signal in the turn on thyristors period, described the
Two periods were to receive a period after trigger signal in the turn on thyristors period.
2. the method as described in claim 1, which is characterized in that changed in the Trigger Angle that the thyristor is not detected
In the case of, the current effective value of the thyristor is calculated according to the Trigger Angle of the thyristor.
3. method according to claim 1 or 2, which is characterized in that the thyristor is positive thyristor, passes through following formula
Calculate the current effective value of the positive thyristor are as follows:
Wherein,For the first time period of positive thyristor；
For the second time period of positive thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
4. method according to claim 1 or 2, which is characterized in that the thyristor is negative sense thyristor, passes through following formula
Calculate the current effective value of the negative sense thyristor are as follows:
Wherein,For the first time period of negative sense thyristor；
[π+α,2π],For the second time period of negative sense thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
5. method according to claim 1 or 2, which is characterized in that the thyristor is positive negative crystal brake tube, comprising: reversely simultaneously
The positive thyristor and negative sense thyristor of connection, the current effective value of the positive and negative thyristor is calculated by following formula are as follows:
Wherein,[π+α,2π],The first time period of the negative crystal that is positive brake tube；
The second time period of the negative crystal that is positive brake tube；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
6. a kind of effective value calculation apparatus of thyristor interrupted current characterized by comprising
Detection unit, for detecting the Trigger Angle of thyristor, wherein the Trigger Angle is added exchange telecommunications on the thyristor
Number, trigger signal moment corresponding phase angle is received in the thyristor, the trigger signal is to trigger the thyristor to produce
The signal of raw conducting electric current；
Computing unit calculates institute according to virtual Trigger Angle in the case where detecting that the Trigger Angle of the thyristor changes
Current effective value of the thyristor in first time period is stated, and the thyristor is calculated according to the Trigger Angle of the thyristor and is existed
Current effective value in second time period, wherein the virtual Trigger Angle is equal to added ac signal on the thyristor
The product of angular frequency and time, the first time period are to receive the time before trigger signal in the turn on thyristors period
Section, the second time period are to receive a period after trigger signal in the turn on thyristors period.
7. device as claimed in claim 6, which is characterized in that the computing unit is also used to that the thyristor is being not detected
Trigger Angle change in the case where, the current effective value of the thyristor is calculated according to the Trigger Angle of the thyristor.
8. device as claimed in claims 6 or 7, which is characterized in that the thyristor is positive thyristor, the computing unit
It is also used to calculate the current effective value of the positive thyristor by following formula are as follows:
Wherein,For the first time period of positive thyristor；
For the second time period of positive thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
9. device as claimed in claims 6 or 7, which is characterized in that the thyristor is negative sense thyristor, the computing unit
It is also used to calculate the current effective value of the negative sense thyristor by following formula are as follows:
Wherein,For the first time period of negative sense thyristor；
[π+α,2π],For the second time period of negative sense thyristor；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
10. device as claimed in claims 6 or 7, which is characterized in that the thyristor is positive negative crystal brake tube, comprising: reversely simultaneously
The positive thyristor and negative sense thyristor of connection, the computing unit are also used to calculate the positive and negative thyristor by following formula
Current effective value are as follows:
Wherein,[π+α,2π],The first time period of the negative crystal that is positive brake tube；
The second time period of the negative crystal that is positive brake tube；
Wherein, I indicates the current effective value of thyristor；α is expressed as the Trigger Angle of thyristor, and value range isω table
Show the angular frequency of added ac signal on thyristor；T indicates the time.
11. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor
Calculation machine program, which is characterized in that realize that claim 1 to 5 is any described when the processor executes the computer program
The effective value calculating method of thyristor interrupted current.
12. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has perform claim
It is required that the computer program of 1 to 5 any effective value calculating method of thyristor interrupted current.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110752738A (en) * | 2019-10-10 | 2020-02-04 | 中冶京诚工程技术有限公司 | Thyristor current effective value calculation method and device and thyristor trigger control system |
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| JPS5629473A (en) * | 1979-08-17 | 1981-03-24 | Toshiba Corp | Commutation failure protecting system for thyristor converter |
| US5153489A (en) * | 1991-06-10 | 1992-10-06 | Unsworth Peter J | Electric current measurement apparatus for a solid state motor controller |
| WO2017028890A1 (en) * | 2015-08-17 | 2017-02-23 | Abb Schweiz Ag | Method of controlling operation of an interface arrangement in a power transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629473A (en) * | 1979-08-17 | 1981-03-24 | Toshiba Corp | Commutation failure protecting system for thyristor converter |
| US5153489A (en) * | 1991-06-10 | 1992-10-06 | Unsworth Peter J | Electric current measurement apparatus for a solid state motor controller |
| WO2017028890A1 (en) * | 2015-08-17 | 2017-02-23 | Abb Schweiz Ag | Method of controlling operation of an interface arrangement in a power transmission system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752738A (en) * | 2019-10-10 | 2020-02-04 | 中冶京诚工程技术有限公司 | Thyristor current effective value calculation method and device and thyristor trigger control system |
| CN110752738B (en) * | 2019-10-10 | 2020-10-30 | 中冶京诚工程技术有限公司 | Thyristor current effective value calculation method and device and thyristor trigger control system |
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