CN112486022A - Method and system for identifying variation trend of electrical quantity - Google Patents
Method and system for identifying variation trend of electrical quantity Download PDFInfo
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- CN112486022A CN112486022A CN202011449381.3A CN202011449381A CN112486022A CN 112486022 A CN112486022 A CN 112486022A CN 202011449381 A CN202011449381 A CN 202011449381A CN 112486022 A CN112486022 A CN 112486022A
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
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Abstract
The invention relates to a method and a system for identifying the variation trend of electrical quantity, comprising the following steps: carrying out rapid filtering processing on the measured electric quantity; carrying out slow filtering processing on the measured electric quantity; the value of the electric quantity after the rapid filtering processing is differed from the value of the electric quantity after the slow filtering processing to obtain a difference value; and judging the difference value to realize the prediction of the variation trend of the electric quantity. The invention adopts the filtering processing technology which is mature and applied in the actual engineering, the program is easy to realize, and the anti-interference performance is strong; the variation trend of the electric quantity can be accurately predicted, so that the control behavior can be changed in advance, and the whole control process and performance are optimized. The invention can be widely used in the automatic control system of the actual engineering.
Description
Technical Field
The present invention relates to the field of automatic control, and more particularly, to a method and system for identifying a variation trend of an electrical quantity.
Background
A complex system generally includes energy storage or inertial elements, and when the system is disturbed or has an input quantity, the control process is not completed immediately, but has a certain transition process. The inertia of the controlled system can make the control action unable to instantaneously correct the deviation of the controlled quantity, and when the deviation is zero, the control system should immediately stop working, but because of the inertia of the controlled system, the control action still continues to go on to the original direction, so that the controlled quantity exceeds the expected value and produces the deviation with opposite sign, and the operation is repeated to make the controlled quantity swing back and forth near the expected value until reaching the equilibrium state. In this tuning process, if the trend of the controlled quantity change can be predicted, the control behavior can be changed in advance to optimize the entire control process and performance. In modern control theory, a method of differentiating the electrical quantity is generally adopted to predict the trend of the electrical quantity, however, in actual engineering, the differentiation has the problems of difficulty in program realization, sensitivity to system noise and the like, cannot be independently applied, and needs to be applied to an actual control system in combination with other control links. In summary, a control method which is easy to implement, has strong anti-interference performance, and can be widely applied to actual engineering for predicting the change of the electrical quantity is lacked in the modern control system.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a method and a system for identifying a variation trend of an electrical quantity, which are easy to implement in a program, have strong anti-interference performance, and have strong practical engineering popularization and application values. The variation trend of the electric quantity can be accurately predicted, so that the control behavior can be changed in advance, and the whole control process and performance are optimized.
In order to achieve the purpose, the invention adopts the following technical scheme: a method of identifying a trend of change of an electrical quantity, comprising the steps of: 1) carrying out rapid filtering processing on the measured electric quantity; 2) carrying out slow filtering processing on the measured electric quantity; 3) the value of the electric quantity after the rapid filtering processing is differed from the value of the electric quantity after the slow filtering processing to obtain a difference value; 4) and judging the difference value to realize the prediction of the variation trend of the electric quantity.
Further, the method for discriminating the difference value comprises the following steps: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
A system for identifying a trend in an electrical quantity, comprising: the device comprises a first processing module, a second processing module, a difference module and a judging module; the first processing module carries out rapid filtering processing on the measured electrical quantity; the second processing module performs slow filtering processing on the measured electrical quantity; the difference module makes a difference between a value obtained by performing rapid filtering processing on the electrical quantity and a value obtained by performing slow filtering processing to obtain a difference value; and the judging module judges the difference value to realize the prediction of the variation trend of the electrical quantity.
Further, in the determination module, the determination method of the difference value is as follows: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention adopts the filtering processing technology which is mature and applied in the actual engineering, the program is easy to realize, and the anti-interference performance is strong. 2. The method can accurately predict the variation trend of the electrical quantity, thereby changing the control behavior in advance and optimizing the whole control process and performance. The invention can be widely used in the automatic control system of the actual engineering.
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Fig. 1 is a schematic flow chart of the present invention for identifying the variation trend of the electrical quantity.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
The invention provides a method for identifying the variation trend of electrical quantity, which is characterized in that after the measured electrical quantity is subjected to fast filtering and slow filtering respectively, the value of the electrical quantity subjected to the fast filtering and the value of the electrical quantity subjected to the slow filtering are subjected to difference processing, and then the difference value is judged, so that the variation trend of the electrical quantity is predicted.
As shown in fig. 1, the method for identifying the variation trend of the electrical quantity of the present invention specifically includes the following steps:
1) carrying out rapid filtering processing on the measured electric quantity;
2) carrying out slow filtering processing on the measured electric quantity;
3) the value of the electric quantity after the rapid filtering processing is differed from the value of the electric quantity after the slow filtering processing to obtain a difference value;
4) judging the difference value in the step 3) to realize the prediction of the variation trend of the electric quantity;
the method specifically comprises the following steps: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
The present invention also provides a system for identifying a variation trend of an electrical quantity, comprising: the device comprises a first processing module, a second processing module, a difference module and a judging module;
the first processing module carries out rapid filtering processing on the measured electrical quantity;
the second processing module carries out slow filtering processing on the measured electrical quantity;
the difference module makes a difference between the value obtained after the electric quantity is subjected to the rapid filtering processing and the value obtained after the electric quantity is subjected to the slow filtering processing to obtain a difference value;
and the judgment module judges the difference value to realize the prediction of the variation trend of the electrical quantity.
In the above embodiment, in the determining module, the difference determining method includes: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
In conclusion, the invention adopts the filtering processing technology which is mature and applied in the actual engineering, the program is easy to realize, and the anti-interference performance is strong; the variation trend of the electric quantity can be accurately predicted, so that the control behavior can be changed in advance, and the whole control process and performance are optimized. The invention can be widely used in the automatic control system of the actual engineering.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Claims (4)
1. A method for identifying a trend of change of an electrical quantity, comprising the steps of:
1) carrying out rapid filtering processing on the measured electric quantity;
2) carrying out slow filtering processing on the measured electric quantity;
3) the value of the electric quantity after the rapid filtering processing is differed from the value of the electric quantity after the slow filtering processing to obtain a difference value;
4) and judging the difference value to realize the prediction of the variation trend of the electric quantity.
2. The method of claim 1, wherein the difference is determined by: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
3. A system for identifying a trend in an electrical quantity, comprising: the device comprises a first processing module, a second processing module, a difference module and a judging module;
the first processing module carries out rapid filtering processing on the measured electrical quantity;
the second processing module performs slow filtering processing on the measured electrical quantity;
the difference module makes a difference between a value obtained by performing rapid filtering processing on the electrical quantity and a value obtained by performing slow filtering processing to obtain a difference value;
and the judging module judges the difference value to realize the prediction of the variation trend of the electrical quantity.
4. The system of claim 1, wherein in the determining module, the difference value is determined by: if the difference value is larger than zero, the variation trend of the electric quantity is rising; if the difference value is smaller than zero, the variation trend of the electrical quantity is descending; if the difference is zero, the electrical quantity is constant and unchanged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011449381.3A CN112486022A (en) | 2020-12-09 | 2020-12-09 | Method and system for identifying variation trend of electrical quantity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011449381.3A CN112486022A (en) | 2020-12-09 | 2020-12-09 | Method and system for identifying variation trend of electrical quantity |
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| CN112486022A true CN112486022A (en) | 2021-03-12 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548965A (en) * | 2003-05-07 | 2004-11-24 | 中兴通讯股份有限公司 | AC voltage under-voltage detecting circuit |
| CN103182589A (en) * | 2011-12-30 | 2013-07-03 | 中国科学院沈阳自动化研究所 | Arc oscillation-based gas shielded welding arc tracking method |
| CN104883158A (en) * | 2015-05-18 | 2015-09-02 | 北汽福田汽车股份有限公司 | Filtering method and filtering device for acceleration pedal signals of electric automobile |
| CN106291246A (en) * | 2016-08-26 | 2017-01-04 | 天津瑞能电气有限公司 | A kind of LES bimodulus quick electrical network fundamental voltage amplitude detection method and bimodulus detector |
| CN108805011A (en) * | 2018-04-24 | 2018-11-13 | 长江大学 | A kind of digital filtering method and system |
| CN109596956A (en) * | 2019-01-08 | 2019-04-09 | 中国恩菲工程技术有限公司 | DC series arc method for measuring and device |
-
2020
- 2020-12-09 CN CN202011449381.3A patent/CN112486022A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1548965A (en) * | 2003-05-07 | 2004-11-24 | 中兴通讯股份有限公司 | AC voltage under-voltage detecting circuit |
| CN103182589A (en) * | 2011-12-30 | 2013-07-03 | 中国科学院沈阳自动化研究所 | Arc oscillation-based gas shielded welding arc tracking method |
| CN104883158A (en) * | 2015-05-18 | 2015-09-02 | 北汽福田汽车股份有限公司 | Filtering method and filtering device for acceleration pedal signals of electric automobile |
| CN106291246A (en) * | 2016-08-26 | 2017-01-04 | 天津瑞能电气有限公司 | A kind of LES bimodulus quick electrical network fundamental voltage amplitude detection method and bimodulus detector |
| CN108805011A (en) * | 2018-04-24 | 2018-11-13 | 长江大学 | A kind of digital filtering method and system |
| CN109596956A (en) * | 2019-01-08 | 2019-04-09 | 中国恩菲工程技术有限公司 | DC series arc method for measuring and device |
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Application publication date: 20210312 |