CN109739082A - A kind of lag observation method and device - Google Patents
A kind of lag observation method and device Download PDFInfo
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- CN109739082A CN109739082A CN201910075489.1A CN201910075489A CN109739082A CN 109739082 A CN109739082 A CN 109739082A CN 201910075489 A CN201910075489 A CN 201910075489A CN 109739082 A CN109739082 A CN 109739082A
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Abstract
The present invention provides a kind of lag observation method and devices, this method comprises: the first proportional component, integral element, the transmission function of practical differentiation element, inertial element and the second proportional component is arranged according to preset lag observation time constant；Setting signal is inputted to the first proportional component, integral element and practical differentiation element respectively, it is corresponding to obtain the first output, the second output and third output；Third is exported into input inertial element and obtains the 4th output, then the 4th output is inputted into the second proportional component, obtains the 5th output；By the first output, the second output and the 5th output input addition link, lag observation output is obtained.The present invention is by the parameter that reasonably setting lag is observed, so that the serials control (an only integral element) that lag observation is constituted can effectively eliminate the process variations of slope disturbance generation, and stability with higher.
Description
Technical field
The present invention relates to thermal power plant's process automatic control technology field more particularly to a kind of lag observation methods and device.
Background technique
Coal fired thermal power plant (abbreviation thermal power plant later) is still the element of thermal power generation at present.
In Power plant process control reality, the input of Coordinated Control Systems mostly uses ramp function.Therefore, for fire
For many Process Control Systems of power plant, such as boiler Stream temperature degree control system, unit denitration control system etc., process is disturbed
Dynamic or external disturbance has the property of slope disturbance.Before on slope, disturbance is not up to final value, PID control can not be eliminated tiltedly
Slope disturbance generates process variations.The effective way for eliminating the process variations is exactly to make controller include 2 integrators, but wrap
Controller containing the 2 integrators technical problem poor there are stability.
Summary of the invention
The embodiment of the invention provides a kind of lag observation method and devices, are used to construct tandem control for lag observation
System can effectively eliminate the process variations that slope disturbance generates, while stability with higher.
According to an aspect of the present invention, a kind of lag observation method is provided, comprising:
According to preset lag observation time constant, the first proportional component, integral element, practical differentiation element, inertia rings are set
The transmission function of section and the second proportional component；
Setting signal is inputted to first proportional component, the integral element and the practical differentiation element respectively, it is right
It should obtain the first output, the second output and third output；
Third output is inputted into the inertial element and obtains the 4th output, then the 4th output is inputted described the
Two proportional components obtain the 5th output；
By first output, second output and the 5th output input addition link, it is defeated to obtain lag observation
Out.
Preferably, the proportional component that the proportional gain of first proportional component is 1.
Preferably, the corresponding transmission function of the integral element are as follows:
In formula, TLOFor preset lag observation time constant.
Preferably, the corresponding transmission function of the practical differentiation element are as follows:
Preferably, the corresponding transmission function of the inertial element are as follows:
Preferably, the negative ratio link that the proportional gain of second proportional component is 1.
Preferably, the ratio between the frequency of the Setting signal and lag observing frequency are greater than 2, wherein the lag observation frequency
Rate is equal to the inverse of the preset lag observation time constant.
According to another aspect of the present invention, a kind of lag observation device is provided, comprising:
Setup module, it is micro- for the first proportional component, integral element, reality to be arranged according to preset lag observation time constant
Divide link, the transmission function of inertial element and the second proportional component；
First computing module, for Setting signal to be inputted to first proportional component, the integral element and institute respectively
Practical differentiation element is stated, it is corresponding to obtain the first output, the second output and third output；
Second computing module obtains the 4th output for third output to be inputted the inertial element, then will be described
4th output inputs second proportional component, obtains the 5th output；
Third computing module, for first output, second output and the 5th output to be inputted addition ring
Section obtains lag observation output.
According to another aspect of the present invention, a kind of lag observation device, including processor and memory, the storage are provided
It is stored with computer program instructions on device, lag observation as described above is realized when described program instruction is executed by processor
Method.
According to another aspect of the present invention, a kind of computer readable storage medium is provided, the computer readable storage medium
On be stored with computer program instructions, lag observation side as described above is realized when described program instruction is executed by processor
Method.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
The present invention provides a kind of lag observation method and devices, this method comprises: normal according to preset lag observation time
Number setting the first proportional component, integral element, the transmission function of practical differentiation element, inertial element and the second proportional component；It will
Setting signal inputs the first proportional component, integral element and practical differentiation element respectively, corresponding to obtain the first output, the second output
It is exported with third；Third is exported into input inertial element and obtains the 4th output, then the 4th output is inputted into the second proportional component, is obtained
To the 5th output；By the first output, the second output and the 5th output input addition link, lag observation output is obtained.The present invention
By the way that the parameter of lag observation is reasonably arranged, so that the serials control (an only integral element) that lag observation is constituted can
Effectively eliminate the process variations that slope disturbance generates, and stability with higher.
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 without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of flow diagram of one embodiment for lagging observation method provided by the invention；
Fig. 2 is a kind of structural schematic diagram of one embodiment for lagging observation device provided by the invention；
Fig. 3 is lag observation structure schematic diagram；
Fig. 4 is the schematic diagram for lagging observing frequency characteristic.
Specific embodiment
The embodiment of the invention provides a kind of lag observation method and devices, are used to construct tandem control for lag observation
System can effectively eliminate the process variations that slope disturbance generates, while stability with higher.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, a kind of one embodiment for lagging observation method provided by the invention, comprising:
101, the first proportional component is arranged according to preset lag observation time constant, integral element, practical differentiation element, be used to
The transmission function of property link and the second proportional component；
In the present embodiment, need to be arranged in advance the preset lag observation time constant T for lagging observationLO, unit is
s.It is understood that lag observing frequency also completes setting simultaneously after the time constant is provided with, it may be assumed that
In formula, the unit for lagging observing frequency is rad/s.
After determining preset lag observation time constant, need to be arranged the transmission function of the links of serials control:
(1) first proportional component:
Wp(s)=Kp=1
In formula, Wp(s) transmission function for being the first proportional component P, KpFor proportional gain, unit dimensionless.
(2) integral element:
In formula, Wi(s) transmission function for being integral element I.
(3) practical differentiation element:
In formula, WADIt (s) is the transmission function of practical differentiation element (Actual differentiation, AD).
(4) inertial element:
In formula, WFOIIt (s) is the transmission function of first order inertial loop (First order inertia, FOI).
(5) second proportional components:
WNP(s)=KNP=-1
In formula, WNP(s) transmission function of the ratio that is negative link (Negative Proportion, NP), KNPFor negative ratio
Gain, unit dimensionless.
After the transmission function of links is provided with, signal input can be carried out, lag observation, lag observation is completed
Structure is as shown in figure 3, detailed process is as follows:
102, Setting signal inputs to the first proportional component, integral element and practical differentiation element respectively, it is corresponding to obtain the
One output, the second output and third output；
Setting signal is inputted to the first proportional component, integral element and practical differentiation element respectively, can correspond to obtain
One output, the second output and third output.
103, third is exported into input inertial element and obtains the 4th output, then the 4th output is inputted into the second proportional component,
Obtain the 5th output；
Then third output is sequentially input into first order inertial loop, the second proportional component obtains the 5th output.
104, by the first output, the second output and the 5th output input addition link, lag observation output is obtained.
First output, the second output are added with the 5th output, obtain the lag observation output of Setting signal.
It is observing frequency characteristic schematic diagram after two, ordinate is respectively phase as shown in (a) and (b) in Fig. 4
(Phase, PH) frequency characteristic PH (ω: ωLP) and gain (Gain, G) frequency characteristic G (ω: ωLP), wherein G (ω: ωLP) adopt
With logarithm dB unit.Abscissa is the frequencies omega (unit rad/s) and lag observing frequency ω of Setting signalLP(i.e. above-mentioned ωLO)
ω: ω LP of ratio.As it can be seen that the frequencies omega in Setting signal is greater than lag observing frequency ω in Fig. 4LP2 times or more when, lag
The phase-frequency characteristic PH (ω: ω of observationLP) it is essentially 0 degree, gain-frequency characterisitic G (ω: ωLP) it is essentially 1.It is considered that:
ω: ωLPWhen greater than 2, lag observation is approximately the proportional component that gain is 1, therefore stability with higher.
A kind of lag observation method provided in an embodiment of the present invention is greater than lag observing frequency in the frequencies omega of Setting signal
ωLP2 times or more when, lag observation be approximately gain be 1 proportional component.In the serials control being made of lag observation,
The parameter of reasonable setting lag observation can effectively eliminate the process variations that slope disturbance generates, and with higher
Stability.
It is the present invention will to be provided below a kind of detailed description that lag observation method carries out provided by the invention above
A kind of lag observation device structure and connection relationship be illustrated, referring to Fig. 2, a kind of lag provided by the invention observation
One embodiment of device, comprising:
Setup module 201, for the first proportional component, integral element, reality to be arranged according to preset lag observation time constant
The transmission function of border differentiation element, inertial element and the second proportional component；
First computing module 202, for Setting signal to be inputted to the first proportional component, integral element and practical differential respectively
Link, it is corresponding to obtain the first output, the second output and third output；
Second computing module 203 obtains the 4th output for third to be exported input inertial element, then the 4th output is defeated
Enter the second proportional component, obtains the 5th output；
Third computing module 204, for obtaining the first output, the second output and the 5th output input addition link stagnant
Observation output afterwards.
Further, the proportional component that the proportional gain of the first proportional component is 1.
Further, the corresponding transmission function of integral element are as follows:
In formula, TLOFor preset lag observation time constant.
Further, the corresponding transmission function of practical differentiation element are as follows:
Further, the corresponding transmission function of inertial element are as follows:
Further, the negative ratio link that the proportional gain of the second proportional component is 1.
Further, the ratio between the frequency of Setting signal and lag observing frequency are greater than 2, wherein lag observing frequency etc.
In the inverse of preset lag observation time constant.
A kind of another embodiment lagging observation device provided by the invention, including processor and memory, memory
On be stored with computer program instructions, lag observation method as described above is realized when program instruction is executed by processor.
The invention further relates to a kind of computer readable storage medium, computer is stored on the computer readable storage medium
Program instruction realizes lag observation method as described above when program instruction is executed by processor.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of lag observation method characterized by comprising
According to preset lag observation time constant be arranged the first proportional component, integral element, practical differentiation element, inertial element and
The transmission function of second proportional component；
Setting signal is inputted to first proportional component, the integral element and the practical differentiation element respectively, to deserved
To the first output, the second output and third output；
Third output is inputted into the inertial element and obtains the 4th output, then the 4th output is inputted into second ratio
Example link obtains the 5th output；
By first output, second output and the 5th output input addition link, lag observation output is obtained.
2. lag observation method according to claim 1, which is characterized in that the proportional gain of first proportional component is
1 proportional component.
3. lag observation method according to claim 2, which is characterized in that the corresponding transmission function of the integral element
Are as follows:
In formula, TLOFor preset lag observation time constant.
4. lag observation method according to claim 3, which is characterized in that the corresponding transmitting letter of the practical differentiation element
Number are as follows:
5. lag observation method according to claim 4, which is characterized in that the corresponding transmission function of the inertial element
Are as follows:
6. lag observation method according to claim 5, which is characterized in that the proportional gain of second proportional component is
1 negative ratio link.
7. according to lag observation method described in claim 6 any one, which is characterized in that the frequency of the Setting signal with
It lags the ratio between observing frequency and is greater than 2, wherein the lag observing frequency is equal to falling for the preset lag observation time constant
Number.
8. a kind of lag observation device characterized by comprising
Setup module, for the first proportional component, integral element, practical differential ring to be arranged according to preset lag observation time constant
The transmission function of section, inertial element and the second proportional component；
First computing module, for Setting signal to be inputted to first proportional component, the integral element and the reality respectively
Border differentiation element, it is corresponding to obtain the first output, the second output and third output；
Second computing module obtains the 4th output for third output to be inputted the inertial element, then by the described 4th
Output inputs second proportional component, obtains the 5th output；
Third computing module, for obtaining first output, second output and the 5th output input addition link
To lag observation output.
9. a kind of lag observation device, which is characterized in that including processor and memory, be stored with computer on the memory
Program instruction is realized as described in any one of claim 1 to claim 7 when described program instruction is executed by processor
Lag observation method.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer journey on the computer readable storage medium
Sequence instruction is realized stagnant as described in any one of claim 1 to claim 7 when described program instruction is executed by processor
Observation method afterwards.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117452807A (en) * | 2023-12-21 | 2024-01-26 | 中北大学 | Method for processing given signal of process of system and control system |
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Application publication date: 20190510 |