CN113175358A - Method, system, equipment and storage medium for analyzing rotating speed signal of steam turbine - Google Patents
Method, system, equipment and storage medium for analyzing rotating speed signal of steam turbine Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
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Abstract
The invention discloses a method, a system, equipment and a storage medium for analyzing a rotating speed signal of a steam turbine, which comprises the following steps: acquiring two rows of steam turbine rotating speed signals; when the rotating speed signals of the two rows of steam turbines are both greater than the preset rotating speed or both less than the preset rotating speed, the rotating speed signals of the two rows of steam turbines are in the same direction; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions; counting the number of times that the rotating speed signals of the two rows of steam turbines are in the same direction, the number of times that the rotating speed signals are in different directions and the number of times that the rotating speed signals are in a flat phase in an adjusting period; the method, the system, the equipment and the storage medium can accurately realize the analysis of the rotating speed signals of the steam turbine and have lower cost.
Description
Technical Field
The invention relates to a signal analysis method, a system, equipment and a storage medium, in particular to a method, a system, equipment and a storage medium for analyzing a rotating speed signal of a steam turbine.
Background
Introduction of primary frequency modulation: PFC (Primary Frequency compensation) turbine speed regulating system automatically regulates the opening of a valve according to the change of the power grid Frequency, and changes the power of the turbine to adapt to the change of the load. The energy of primary frequency modulation is supported by boiler energy storage so as to adapt to rapid and small-amplitude load change. When the primary frequency modulation reaches a steady state, the static difference exists in the power grid frequency.
According to the requirement of the primary frequency modulation function, the response time of the primary frequency modulation is less than 3 seconds according to the primary frequency modulation guide rule of the power system; the adjusting capacity reaches 75% of the theoretical amplitude within 15 seconds; the adjusting capacity reaches 90% of the theoretical amplitude within 30 seconds; the stability is achieved within 60 seconds, and the precision requirement is met.
The DEH digital electro-hydraulic regulation system generally comprises three steam turbine rotating speed signals, the rotating speed signals are subjected to three-selection processing, a TSI steam turbine monitoring instrument system comprises 1-3 steam turbine rotating speed signals, a generator comprises a frequency signal, buses of some units are provided with the frequency signal, in order to improve the regulation characteristic of primary frequency modulation, a high-precision homologous device is further arranged for collecting the frequency signal, the frequency signal and the rotating speed signals have a fixed multiplying power relation, namely the rotating speed is 60 multiplied by the frequency, and the rotating speed signals after frequency conversion are collectively referred to as frequency rotating speed hereinafter for distinction.
Theoretically, the listed signals all have independent variable signals serving as primary frequency modulation, but due to the practical measurement reasons, some signals have clutter and jump, some signals have low sensitivity and poor precision and are not timely in response, some signals have bias, the phenomenon that the whole is higher or lower is shown, the whole deviates from the real measurement value of the signals, the fluctuation change of the practical rotating speed cannot be correctly reflected, and the signals cannot be correctly involved in regulation, so that the signals need to be analyzed and compared, and a signal which is closest to the assessment reference frequency of the power grid is selected.
In fact, in real work, due to the lack of an analysis tool, the rotating speed signal is roughly analyzed only by the historical trend provided by the DCS system, so the rotating speed signal is rough, because the rotating speed signal can only provide curve original sampling data and a curve form, but does not provide the rotating speed signal and a characteristic index between the rotating speed signals, which measuring signal represents the power grid frequency more accurately cannot be known exactly, and when the rotating speed signal is used, the rotating speed signal is simply selected and replaced.
The selection of the rotating speed signal is the first and the most critical, and if the variable signal of the primary frequency modulation function has a problem, the adjustment quality index of the primary frequency modulation function cannot reach the qualification.
The prior art at present has the following defects:
1) the popular general design generally adopts the rotating speed of a steam turbine for DEH speed regulation, and the selected rotating speed is set by selecting several parameters, namely, selecting the parameters to be large, selecting the parameters to be small, selecting the parameters to be average, or appointing to select a measuring point, wherein the setting in the selecting process is really different from three rotating speed sources thereof in a common mode, namely, the setting is similar to the three rotating speed sources but not true. And the accurate rotating speed signal which is the same as or highly similar to the power grid frequency cannot be selected in the true sense due to the lack of index comparison with the power grid reference check frequency. There is some blindness.
2) Because the power grid dispatching pursues further improvement on the power grid frequency index, many units change the rotating speed signal into the generator frequency or the bus frequency signal after being examined by the primary frequency modulation index, but because the detailed comparison and analysis with the power grid reference examination frequency signal index is lacked, an ideal adjusting effect is not necessarily obtained.
3) Under the influence of the market, some power plants are penalized by examination, frequency homologous devices or high-precision frequency transmitters are installed, the homologous devices improve the frequency measurement precision, but the frequency homologous devices are not compared with the reference frequency, the accuracy of the homologous devices is questionable, and the cost is high. It is not necessary to blindly configure one set for each unit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method, a system, equipment and a storage medium for analyzing a steam turbine rotating speed signal, wherein the method, the system, the equipment and the storage medium can accurately analyze the steam turbine rotating speed signal and have lower cost.
In order to achieve the purpose, the method for analyzing the rotating speed signal of the steam turbine comprises the following steps:
acquiring two rows of steam turbine rotating speed signals;
when the rotating speed signals of the two rows of steam turbines are both greater than the preset rotating speed or both less than the preset rotating speed, the rotating speed signals of the two rows of steam turbines are in the same direction; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
counting the number of times that the rotating speed signals of the two rows of steam turbines are in the same direction, the number of times that the rotating speed signals are in different directions and the number of times that the rotating speed signals are in a flat phase in an adjusting period;
and calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively, and finishing the analysis of the steam turbine rotating speed signals.
Further comprising: and calculating the maximum value, the minimum value, the average value, the accumulated value and the summation value of the steam turbine rotating speed signal according to the rotating speed signal of the steam turbine, and then displaying the maximum value, the minimum value, the average value, the accumulated value and the summation value of the steam turbine rotating speed signal.
Further comprising: setting alarm upper and lower limits and a dead zone; and counting and displaying the times and time for the steam turbine rotating speed signal to exceed the upper and lower alarm limits.
Further comprising: when the rotating speed signal of the steam turbine is greater than the preset rotating speed, counting the direction increasing number of the rotating speed signal of the steam turbine relative to the preset rotating speed, and calculating the direction increasing index according to the direction increasing number.
Further comprising: and when the rotating speed signal of the steam turbine is equal to the preset rotating speed, counting the dead zone number of the rotating speed signal of the steam turbine.
Further comprising: when the rotating speed signal of the steam turbine is smaller than the preset rotating speed, counting the direction reduction number of the rotating speed signal of the steam turbine relative to the preset rotating speed, and calculating a direction reduction index according to the direction reduction number.
And displaying the number of times that the rotating speed signals of the two rows of turbines are in the same direction, the number of times that the rotating speed signals of the two rows of turbines are in different directions and the number of times that the rotating speed signals of the two rows of turbines are in the same phase in a point display mode or a line display mode respectively in percentage of the total statistical number.
A steam turbine rotational speed signal analysis system comprises the following steps:
the acquisition module is used for acquiring two rows of steam turbine rotating speed signals;
the comparison module is used for determining that the rotating speed signals of the two rows of steam turbines are in the same direction when the rotating speed signals of the two rows of steam turbines are both greater than or both less than the preset rotating speed; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
the statistical module is used for counting the times of equidirectional, incongruous and flat phases of the rotating speed signals of the two rows of steam turbines in the adjusting period;
and the calculation module is used for calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively, and completing the analysis of the steam turbine rotating speed signals.
A computer apparatus comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor implementing the steps of said method for analyzing a steam turbine speed signal when executing said computer program.
A computer-readable storage medium, which stores a computer program that, when being executed by a processor, carries out the steps of the method for analyzing a rotational speed signal of a steam turbine.
The invention has the following beneficial effects:
the method, the system, the equipment and the storage medium for analyzing the steam turbine rotating speed signals obtain two rows of steam turbine rotating speed signals during specific operation, and calculate the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively. In addition, different systems can be analyzed through the method, so that the cost is low and the universality is high.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Example one
Referring to fig. 1, the method for analyzing the rotational speed signal of the steam turbine according to the present invention includes the following steps:
1) acquiring two rows of steam turbine rotating speed signals or frequency signals;
2) calculating the maximum value, the minimum value, the average value, the accumulated value and the summation value of the rotating speed signal of the steam turbine according to the rotating speed signal or the frequency signal of the steam turbine;
3) setting alarm upper and lower limits and a dead zone; counting and displaying the number of times of exceeding the upper limit and the lower limit of the rotating speed signal of the steam turbine and the time of exceeding the upper limit and the lower limit;
4) when the rotating speed signal of the steam turbine is greater than 3000r/m, counting the direction increasing number of the rotating speed signal of the steam turbine relative to 3000r/m, and calculating a direction increasing index according to the direction increasing number;
when the rotating speed signal of the steam turbine is equal to 3000r/m, counting the number of dead zones of the rotating speed signal of the steam turbine;
when the rotating speed signal of the steam turbine is smaller than 3000r/m, counting the number of the reducing directions of the rotating speed signal of the steam turbine relative to 3000r/m, and calculating a reducing direction index according to the reducing direction number;
5) comparing the states of the rotating speed signals of the two rows of turbines relative to 3000r/m, and when the rotating speed signals of the two rows of turbines are both larger than 3000r/m or both smaller than 3000r/m, the rotating speed signals of the two rows of turbines are in the same direction; when the rotating speed signals of the two rows of turbines are equal to 3000r/m, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
6) counting the number of times that the rotating speed signals of the two rows of steam turbines are in the same direction, the number of times that the rotating speed signals are in different directions and the number of times that the rotating speed signals are in a flat phase in an adjusting period;
7) and calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistics, and displaying to finish the analysis of the steam turbine rotating speed signals.
The above display modes include a display mode in which a point and a line are selected in a discrete point display mode and a display mode in which a curve is fitted.
Example two
The invention relates to a steam turbine rotating speed signal analysis system, which comprises the following steps:
the acquisition module is used for acquiring two rows of steam turbine rotating speed signals;
the comparison module is used for determining that the rotating speed signals of the two rows of steam turbines are in the same direction when the rotating speed signals of the two rows of steam turbines are both greater than or both less than the preset rotating speed; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
the statistical module is used for counting the times of equidirectional, incongruous and flat phases of the rotating speed signals of the two rows of steam turbines in the adjusting period;
and the calculation module is used for calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively, and completing the analysis of the steam turbine rotating speed signals.
EXAMPLE III
A computer apparatus comprising a memory, a processor and a computer program stored in said memory and executable on said processor, said processor implementing the steps of said method for analyzing a steam turbine speed signal when executing said computer program.
Example four
A computer-readable storage medium, which stores a computer program that, when being executed by a processor, carries out the steps of the method for analyzing a rotational speed signal of a steam turbine.
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.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A method for analyzing a rotating speed signal of a steam turbine is characterized by comprising the following steps:
acquiring two rows of steam turbine rotating speed signals;
when the rotating speed signals of the two rows of steam turbines are both greater than the preset rotating speed or both less than the preset rotating speed, the rotating speed signals of the two rows of steam turbines are in the same direction; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
counting the number of times that the rotating speed signals of the two rows of steam turbines are in the same direction, the number of times that the rotating speed signals are in different directions and the number of times that the rotating speed signals are in a flat phase in an adjusting period;
and calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively, and finishing the analysis of the steam turbine rotating speed signals.
2. The method for analyzing a steam turbine speed signal according to claim 1, further comprising: and calculating the maximum value, the minimum value, the average value, the accumulated value and the summation value of the steam turbine rotating speed signal according to the rotating speed signal of the steam turbine, and then displaying the maximum value, the minimum value, the average value, the accumulated value and the summation value of the steam turbine rotating speed signal.
3. The method for analyzing a steam turbine speed signal according to claim 1, further comprising: setting alarm upper and lower limits and a dead zone; and counting and displaying the times and time for the steam turbine rotating speed signal to exceed the upper and lower alarm limits.
4. The method for analyzing a steam turbine speed signal according to claim 1, further comprising: when the rotating speed signal of the steam turbine is greater than the preset rotating speed, counting the direction increasing number of the rotating speed signal of the steam turbine relative to the preset rotating speed, and calculating the direction increasing index according to the direction increasing number.
5. The method for analyzing a steam turbine speed signal according to claim 1, further comprising: and when the rotating speed signal of the steam turbine is equal to the preset rotating speed, counting the dead zone number of the rotating speed signal of the steam turbine.
6. The method for analyzing a steam turbine speed signal according to claim 1, further comprising: when the rotating speed signal of the steam turbine is smaller than the preset rotating speed, counting the direction reduction number of the rotating speed signal of the steam turbine relative to the preset rotating speed, and calculating a direction reduction index according to the direction reduction number.
7. The method for analyzing a steam turbine rotational speed signal according to claim 1, further comprising displaying the number of times that the two rows of steam turbine rotational speed signals are in the same direction, the number of times that the two rows of steam turbine rotational speed signals are in the different directions, and the number of times that the two rows of steam turbine rotational speed signals are in the flat phase, as percentages of the total statistical number of times, in a point display manner or a line display manner.
8. A steam turbine rotational speed signal analysis system is characterized by comprising the following steps:
the acquisition module is used for acquiring two rows of steam turbine rotating speed signals;
the comparison module is used for determining that the rotating speed signals of the two rows of steam turbines are in the same direction when the rotating speed signals of the two rows of steam turbines are both greater than or both less than the preset rotating speed; when the rotating speed signals of the two rows of turbines are equal to the preset rotating speed, the rotating speed signals of the two rows of turbines are in a flat phase; otherwise, the rotating speed signals of the two rows of steam turbines are in different directions;
the statistical module is used for counting the times of equidirectional, incongruous and flat phases of the rotating speed signals of the two rows of steam turbines in the adjusting period;
and the calculation module is used for calculating the percentage of the number of equidirectional times, the number of incongruous times and the number of flat phases of the two rows of steam turbine rotating speed signals in the total statistical number respectively, and completing the analysis of the steam turbine rotating speed signals.
9. A computer arrangement comprising a memory, a processor and a computer program stored in said memory and executable on said processor, wherein said processor when executing said computer program performs the steps of the method for analyzing a rotational speed signal of a steam turbine according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for analyzing a rotational speed signal of a steam turbine according to any one of claims 1 to 7.
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| CN202110409537.3A CN113175358A (en) | 2021-04-16 | 2021-04-16 | Method, system, equipment and storage medium for analyzing rotating speed signal of steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151147A (en) * | 2021-11-30 | 2022-03-08 | 西安热工研究院有限公司 | Fault early warning method, system, equipment and medium for abnormal rotating speed of steam turbine |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114151147A (en) * | 2021-11-30 | 2022-03-08 | 西安热工研究院有限公司 | Fault early warning method, system, equipment and medium for abnormal rotating speed of steam turbine |
| CN114151147B (en) * | 2021-11-30 | 2024-04-26 | 西安热工研究院有限公司 | Fault early warning method, system, equipment and medium for abnormal rotating speed of steam turbine |
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