CN114779073B - Stator core compression state fault detection device, detection method, generator set monitoring system and computer readable storage medium - Google Patents
Stator core compression state fault detection device, detection method, generator set monitoring system and computer readable storage medium Download PDFInfo
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- CN114779073B CN114779073B CN202210343387.5A CN202210343387A CN114779073B CN 114779073 B CN114779073 B CN 114779073B CN 202210343387 A CN202210343387 A CN 202210343387A CN 114779073 B CN114779073 B CN 114779073B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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Abstract
The embodiment of the application provides a stator core compression state fault detection device, a detection method, a generator set monitoring system and a computer readable storage medium, which relate to the technical field of generator operation on-line monitoring and comprise the following steps: taking the measuring points with abnormal information in the measuring point group as suspected measuring points, and judging whether the abnormal information exists in the conditions of the adjacent measuring points of the suspected measuring points; if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal; if the abnormal information exists in the adjacent measuring points of the suspected measuring points, the abnormal of the through screw in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is judged. The stator core compression state fault detection method provided by the embodiment can further position the abnormal through screw rod to acquire more accurate information, and meanwhile, the monitoring assembly can be subjected to auxiliary verification, so that inaccuracy of monitoring information caused by the fact that the monitoring assembly is abnormal is avoided.
Description
Technical Field
The application relates to the technical field of online monitoring of generator operation, in particular to a stator core compression state fault detection device, a detection method, a generator set monitoring system and a computer readable storage medium.
Background
When the generator is operated, the stator core is subjected to the comprehensive effects of mechanical force, thermal stress and electromagnetic force. Under long-term operation conditions, the stator core pressing force can be gradually reduced under the combined action of various factors, if timely monitoring and effective early warning and control cannot be obtained, the stator core is loosened, accidents such as vibration, noise, even tooth breakage of a punching sheet, burning loss, wire rod pressure breaking and the like of a generator set are caused, abnormal shutdown of the set is caused, and huge economic loss is generated.
At present, the method for monitoring and overhauling the compaction state of the stator core of the generator mainly comprises two modes:
1. the hidden danger of loosening of the stator core is manually removed by means of periodical maintenance of a power plant. On one hand, the method is not targeted, and the working efficiency is low; on the other hand, the compaction state of the stator core cannot be mastered in real time and early warning can not be carried out.
2. The pressure sensor is adopted, and the pressure between the stator core sheets is obtained to detect the compression state of the stator core, so that the method is limited by the narrow installation space and is inconvenient to install; on the other hand, the monitoring mode needs that the monitoring pieces are mutually adhered and form an annular detection group by taking the core axis as the center, and a plurality of layers are arranged along the axial direction of the stator core, so that the system is complex. In addition, the monitoring mode has the problem of low pertinence, because the loosening of the stator core mainly occurs at the tooth part of the side section of the stator core first.
Disclosure of Invention
The embodiment of the application provides a stator core compression state fault detection device, a detection method, a generator set monitoring system and a computer readable storage medium, which can acquire more accurate positioning information of a penetration screw with an abnormality, thereby improving the later maintenance efficiency.
In one aspect, the present embodiment provides a method for detecting a fault in a compression state of a stator core, including the steps of: taking the measuring points with abnormal information in the measuring point group as suspected measuring points, and judging whether the abnormal information exists in the conditions of the adjacent measuring points of the suspected measuring points; if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal; if the abnormal information exists in the adjacent measuring points of the suspected measuring points, judging that the through screw rod in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is abnormal; the measuring point group comprises a plurality of measuring points which are respectively arranged at different through screws, each measuring point is configured to measure the axial force of a plurality of through screws, and the distance between the adjacent measuring points is the uncorrelated nearest distance.
In some embodiments, after determining that the screw is abnormal in the common monitoring area of the suspected measuring point and the measuring point adjacent to the suspected measuring point, the method further comprises the following steps: acquiring the percentage t1 of the axial force change amount of the through screw at the suspected measuring point; acquiring the percentage t2 of the axial force change amount of the through screw at the adjacent measuring point of the suspected measuring point; and determining the region of the abnormal penetration screw according to t1 and t 2.
In some of these embodiments, determining the region in which the abnormal feed-through screw is located from t1 and t2 comprises: the ratio of the distance between the abnormal through screw and the suspected measuring point to the distance between the abnormal through screw and the adjacent measuring point of the suspected measuring point is t 2/t1.c%, wherein c% is a correction value.
In some of these embodiments, the method further comprises the steps of: defining the area where the abnormal punching screw is located as the area where the theoretical abnormal punching screw is located; judging whether a theoretical abnormal penetration screw exists in the area where the theoretical abnormal penetration screw is located or not; when the number of the actual penetrating screws in the area where the theoretical abnormal penetrating screws are located is 0, judging that at least two abnormal penetrating screws exist in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point.
In some of these embodiments, it is still determined that the actual feed-through screw is located in the region where the theoretical abnormal feed-through screw is located when the distance of the actual feed-through screw from the range of the theoretical abnormal feed-through screw is less than or equal to L.
In some of these embodiments, the method further comprises the steps of: selecting a group of measuring points with the farthest distance between adjacent measuring points in at least two measuring point groups as a normal detection group; when the normal detection group detects abnormal information of the suspected measuring point and the abnormal penetrating screw rod is judged to be positioned in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point, other measuring points with relatively close distances to the adjacent measuring point are started; wherein, at least one measuring point in other set of measuring points that enable is located in the common monitoring area of suspected measuring point and the adjacent measuring point of suspected measuring point.
In some embodiments, at most one measuring point is arranged on the penetrating screw at any position.
On the other hand, the present embodiment provides a stator core compression state failure detection apparatus including: a judgment module configured to perform the following operations: taking the measuring points with abnormal information in the measuring point group as suspected measuring points, and judging whether the abnormal information exists in the conditions of the adjacent measuring points of the suspected measuring points; if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal; if the abnormal information exists in the adjacent measuring points of the suspected measuring points, the abnormal of the through screw in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is judged.
The present embodiment also provides a generator set monitoring system, including a memory and a processor, where the memory stores a computer program, and the computer program when executed by the processor implements the stator core compression state fault detection method according to any one of the above embodiments.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program that is loaded by a processor to perform the stator core compaction state failure detection method of any one of the above embodiments.
The beneficial effects are that:
(1) According to the stator core compression state fault detection method, through further searching for the position of the abnormal through screw, the abnormal through screw can be further positioned, more accurate information can be obtained, meanwhile, the monitoring assembly can be subjected to auxiliary verification, and inaccuracy of monitoring information caused by the fact that the monitoring assembly is abnormal is avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a stator core compression state fault detection method provided by some embodiments of the present application;
fig. 2 is a partial flow chart of a stator core compression state fault detection method provided in some embodiments of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.
The use of "adapted" or "configured" in this disclosure is meant to be an open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive in that a process, step, calculation, or other action "based on" one or more of the stated conditions or values may be based on additional conditions or beyond the stated values in practice.
In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
In one aspect, the present embodiment provides a method for detecting a fault in a compressed state of a stator core, as shown in fig. 1 and 2, including the steps of:
s10: acquiring suspected measuring points; s20: judging whether abnormal information exists in the conditions of adjacent measuring points of the suspected measuring points; s30: if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal; s40: if the abnormal information exists in the adjacent measuring points of the suspected measuring points, judging that the through screw rod in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is abnormal; the measuring point group comprises a plurality of measuring points which are respectively arranged at different through screws, each measuring point is configured to measure the axial force of a plurality of through screws, and the distance between the adjacent measuring points is the uncorrelated nearest distance.
In the above embodiment, in S10, the measurement point with the abnormal information in the measurement point group is taken as a suspected measurement point, which may be any one or more of all the measurement points arranged, and the system monitors multiple measurement points in the measurement point group simultaneously, so as to monitor the compaction state of the whole stator core; adjacent points to the suspected point refer to one or more points along the surface of the stator core that are closest to the suspected point in multiple directions. In S30, the fact that the adjacent measurement points of the suspected measurement points have no abnormal information indicates that one or more of the adjacent measurement points of the suspected measurement points have no abnormal information indicates that the abnormal penetrating screw is not in the monitoring area of the adjacent measurement points of the suspected measurement points, and further the judgment result is that the penetrating screw at the suspected measurement points is abnormal. S40, the adjacent measuring points of the suspected measuring points have abnormal information, and the number of the adjacent measuring points of the suspected measuring points is at least one; when the number of the adjacent measuring points of the suspected measuring point is one, the abnormal through screw rod can be judged to be positioned in a common monitoring area of the suspected measuring point and the adjacent measuring points of the suspected measuring point; when a plurality of measuring points are abnormal in the adjacent measuring points of the suspected measuring points, the abnormal through screw rod can be judged to be positioned in the suspected measuring points and the common monitoring area of the adjacent measuring points of the suspected measuring points. The measuring point group comprises measuring points for obtaining the axial force of a plurality of through screws, wherein the axial force detection site of one through screw is one measuring point, and an axial force detection assembly is arranged at the measuring point and used for obtaining the axial force of the corresponding through screw; when the two adjacent measuring points in the measuring point group are not related, the axial force of the penetrating screw corresponding to one of the measuring points is not changed when the penetrating screw corresponding to the adjacent measuring points is loosened. Each measuring point on the stator iron core can monitor the loosening condition of all the stator iron cores in a circular range formed by taking the measuring point as a circle center and taking the diameter as a certain distance. The distance between adjacent measuring points is the uncorrelated nearest distance, and if one of the penetrating screw rods is smaller than the uncorrelated nearest distance, the penetrating screw rod is related to the penetrating screw rod at the measuring point, the penetrating screw rod loosens, and the penetrating screw rod of the measuring point, of which the distance with the penetrating screw rod is smaller than the uncorrelated nearest distance, is also affected and then is detected by the axial force detection assembly. The arrangement of the sets of points is as described above, and in different examples, a plurality of sets of points may be provided according to the arrangement, each set of points including a plurality of points.
According to the embodiment, when the stator core is loosened, the position area where the loose penetrating screw rod is located can be obtained more accurately, corresponding preventive measures can be effectively made, an abnormal source can be found more quickly, and equipment overhaul efficiency is improved.
In some embodiments, after determining that the screw is abnormal in the common monitoring area of the suspected measuring point and the measuring point adjacent to the suspected measuring point, the method further comprises the following steps:
s50: the method comprises the steps of obtaining the percentage of axial force change of a piercing screw at a suspected measuring point, and defining the percentage as t1; s60: acquiring the percentage of the axial force change amount of the through screw at the adjacent measuring point of the suspected measuring point, and defining the percentage as t2; s70: and determining the region of the abnormal penetration screw according to t1 and t 2.
In some of these embodiments, the specific determination method of S70 includes the steps of:
under the stable working condition, the ratio of the distance between the abnormal penetration screw and the suspected measuring point to the distance between the abnormal penetration screw and the adjacent measuring point of the suspected measuring point is t 2/t1.c%, wherein c% is a correction value.
Under the unstable working condition, the distance ratio of the abnormal penetration screw to the suspected measuring point and the distance ratio of the abnormal penetration screw to the adjacent measuring point of the suspected measuring point may have a nonlinear one-to-one correspondence, a one-to-one correspondence is obtained through a preliminary experiment, a related model is established according to the correspondence, and under the corresponding unstable working condition, the distance ratio of the normal penetration screw to the suspected measuring point and the adjacent measuring point of the suspected measuring point is obtained according to the obtained t1 and t2 values and the corresponding correction value is selected.
When the adjacent measuring points of the suspected measuring points with abnormal information are one, defining the adjacent measuring points of the suspected measuring points as second measuring points, obtaining the percentage of the change of the axial force of the through screw at the suspected measuring points as t1, and obtaining the percentage of the change of the axial force of the through screw at the second measuring points as t2, wherein t2/t1 & c% is the ratio of the distance between the abnormal through screw and the suspected measuring points and the distance between the abnormal through screw and the second measuring points. Assuming that t1 is 30% and t2 is 10%, at this time, the ratio of the distance between the abnormal screw and the suspected measuring point and the distance between the abnormal screw and the second measuring point is 10%/30% =1:3, at this time, the suspected measuring point and the second measuring point are connected into a line segment, and the abnormal screw is located on or near a line perpendicular to the line segment formed at the four bisectors of the line segment. c% is a correction value, in actual measurement, according to different working conditions and service conditions of the generator set, a certain deviation exists in a structure obtained by specific measurement, for example, a certain deviation exists between an abnormal through screw and a value of a theoretical measuring point, and the correction value is introduced to correct, so that a more accurate result is obtained; it should be noted that the specific value of c% is not necessarily the same at different times.
In other examples, when the number of the adjacent suspected measuring points with abnormal information is two or more, the distance ratio of the suspected measuring points to each of the adjacent suspected measuring points is obtained respectively, and finally the more accurate area where the abnormal penetrating screw exists is obtained through multiple groups of data.
In some embodiments, after obtaining the distance ratio of the abnormal screw to the suspected measuring point and the adjacent measuring point of the suspected measuring point, the method further comprises the following steps:
s80: obtaining a region where the theoretical abnormal penetration screw is located according to the distance ratio of the abnormal penetration screw to the suspected measuring point and the adjacent measuring point of the suspected measuring point; s90: judging whether a theoretical abnormal penetration screw exists in the area where the theoretical abnormal penetration screw is located or not; s100: when the number of the actual penetrating screws in the area where the theoretical abnormal penetrating screws are located is 0, judging that at least two abnormal penetrating screws exist in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point.
In the above embodiment, the area where the theoretical abnormal screw is located is obtained by the above embodiment, and if there is no screw in the area, there may be a case where a plurality of screws are abnormal in the common monitoring area of the suspected measuring point and the adjacent measuring point. And sending the judging result to the system, and continuing the next judgment. The position of the region where the theoretical abnormal screw is located and the position of the screw near the region can be corrected because of the existence of the correction value c%, so that in the same period, the screw is not present in the region where the theoretical abnormal screw still appears after correction, and a plurality of screw anomalies in the common monitoring region of the suspected measuring point and the adjacent measuring points of the suspected measuring point can be obtained. In other examples, to ensure safety, it is determined that a plurality of abnormal screws pass through in a common monitoring area of a suspected measuring point and adjacent measuring points of the suspected measuring point, the correction value may be detected by using c% =1, so as to avoid that the correction value is not updated and detection is missed.
In some of these embodiments, it is still determined that the actual feed-through screw is located in the region where the theoretical abnormal feed-through screw is located when the distance of the actual feed-through screw from the range of the theoretical abnormal feed-through screw is less than or equal to L. In this embodiment, a value L is continuously preset to perform position correction, and the range of L can be relatively enlarged to obtain the positions of a plurality of actual piercing screws, and the piercing screws are all sent to the system as suspected abnormal values, so that missing situations are avoided, and equipment overhaul can be more accurate.
In some of these embodiments, arranging a number of stations along the feed-through screw specifically comprises the steps of:
a set of stations is provided and used to perform the steps of any of the above embodiments.
In still other embodiments, the stator core compression state fault detection method further comprises the steps of:
setting at least two groups of measuring points; selecting a group of measuring points with farthest adjacent measuring points as a normal detection group; when one measuring point in the normal detection group detects an abnormality, and when the abnormal penetrating screw is judged to be positioned in a common monitoring area between the suspected measuring point and the adjacent measuring point of the suspected measuring point, the other group measuring points which are relatively normal detection group and are close to the adjacent measuring point are started to detect, so that more accurate position judgment is realized, the secondary verification of the abnormal penetrating screw can be realized, and more accurate information is obtained; wherein, at least one measuring point in other set of measuring points that enable is located in the common monitoring area of suspected measuring point and the adjacent measuring point of suspected measuring point.
When the normal detection group detects that abnormal through screw information exists in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point, and when the second group of measuring points are adopted to detect that abnormal through screw information exists, the suspected normal group measuring point is obtained to have detection abnormality. In the running process of the equipment, the abnormal condition of the measuring point itself exists, and the specific detection condition of the axial force of the through screw at the position of the measuring point cannot be accurately reflected, so that whether a sensor for detecting the axial force of the through screw is in question is required to be considered.
In some embodiments, the other set of enabled measurement points includes at least two measurement points located in a common monitoring region between a suspected measurement point and a measurement point adjacent to the suspected measurement point in the normal detection set. When the normal detection group detects that the abnormal penetrating screw is positioned in the common monitoring area of the suspected measuring point and the adjacent measuring points of the suspected measuring point, the second group of measuring points are started, the detection method which is the same as that of the normal detection group is adopted for detecting again, so that more accurate position information of the abnormal penetrating screw is obtained, and the abnormal of the measuring points of the normal detection group is verified in an auxiliary mode.
In some embodiments, at most one measuring point is arranged on the penetrating screw at any position. In the embodiment, when different loosening grades are adjusted by setting the initial position screw rod and multiple groups of measuring points are obtained, more than one measuring point is not arranged on one through screw rod, so that the loosening condition of the stator core can be better detected by setting, and more comprehensive monitoring performance is realized.
In some of these embodiments, the initial bit screw preload change is achieved by adjusting to different loosening levels, including: first grade, [85%,100% ] of the load of the feed-through screw 10; second grade, [70%,85% of the load of the feed-through screw 10); third grade, [60%,70% of the load of the feed-through screw 10); fourth grade, [10%,60% of the load of the feed-through screw 10); fifth grade, [0, 10%) of the load of the feed-through screw 10. According to different loosening grades, the pre-tightening force of the initial position screw rod is selectively adjusted, so that the debugging efficiency of the pre-tightening force is ensured. Under the actual use condition, the number of the measuring points can be selectively set according to different detection requirements of the generator set, when the detection requirements are relatively low, the fewer measuring point groups can be adopted, and at least one group can be used; when the detection requirement is relatively high, a plurality of groups of measuring points can be arranged according to the actual situation.
On the other hand, the present embodiment also provides a stator core compression state fault detection device, a judgment module configured to perform the following operations: taking the measuring points with abnormal information in the measuring point group as suspected measuring points, and judging whether the abnormal information exists in the conditions of the adjacent measuring points of the suspected measuring points; if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal; if the abnormal information exists in the adjacent measuring points of the suspected measuring points, the abnormal of the through screw in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is judged.
The embodiment also provides a generator set monitoring system, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program realizes the stator core compression state fault detection method in any one of the embodiments when being executed by the processor.
In some of these embodiments, the genset monitoring system may be applied to a hydro-generator set.
The present embodiment also provides a computer-readable storage medium having stored thereon a computer program that is loaded by a processor to perform the stator core compaction state failure detection method according to any one of the above embodiments.
The above description has been made in detail of a stator core compression state fault detection device, a detection method, a generator set monitoring system and a computer readable storage medium provided by the embodiments of the present application, and specific examples are applied herein to illustrate the principles and implementations of the present application, where the above description of the embodiments is only for helping to understand the method and core ideas of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (10)
1. The stator core compression state fault detection method is characterized by comprising the following steps of:
taking the measuring points with abnormal information in the measuring point group as suspected measuring points, and judging whether the conditions of the adjacent measuring points of the suspected measuring points have the abnormal information or not;
if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the through screw at the suspected measuring points is abnormal;
if the abnormal information exists in the adjacent measuring points of the suspected measuring points, judging that the penetration screw rod in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is abnormal;
the measuring point group comprises a plurality of measuring points which are respectively arranged at different through screws, each measuring point is configured to measure the axial force of a plurality of through screws, and the distance between the adjacent measuring points is the uncorrelated nearest distance.
2. The method for detecting a failure in a compressed state of a stator core according to claim 1, wherein,
after determining that the screw rod in the common monitoring area of the suspected measuring point and the measuring point adjacent to the suspected measuring point is abnormal, the method further comprises the following steps:
acquiring the percentage t1 of the axial force change amount of the piercing screw at the suspected measuring point;
acquiring the percentage t2 of the axial force change amount of the through screw at the position of the adjacent measuring point of the suspected measuring point;
and determining the region of the abnormal penetration screw according to t1 and t 2.
3. The stator core compact state failure detection method according to claim 2, wherein the determining the region where the abnormal feed-through screw is located according to t1 and t2 includes:
the ratio of the distance between the abnormal through screw and the suspected measuring point to the distance between the abnormal through screw and the adjacent measuring point of the suspected measuring point is t 2/t1.c%, wherein c% is a correction value.
4. A stator core compact state failure detection method according to claim 2 or 3, further comprising the steps of:
defining the area where the abnormal punching screw is located as the area where the theoretical abnormal punching screw is located;
judging whether the theoretical abnormal through screw exists in the area where the theoretical abnormal through screw exists or not;
when the actual number of the penetrating screws in the area where the theoretical abnormal penetrating screws are located is 0, judging that at least two abnormal penetrating screws exist in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point.
5. The method according to claim 4, wherein when the distance of the actual feed-through screw from the theoretical abnormal feed-through screw range is equal to or less than L, it is still determined that the actual feed-through screw is located in the area where the theoretical abnormal feed-through screw is located.
6. The stator core compact state failure detection method according to claim 1, further comprising the steps of:
selecting a group of measuring points with the farthest distance between adjacent measuring points in at least two measuring point groups as a normal detection group;
when the normal detection group detects the abnormal information of the suspected measuring points and the screw rod with abnormality is judged to be positioned in a common monitoring area of the suspected measuring points and adjacent measuring points of the suspected measuring points, other group measuring points with relatively close distances to the normal detection group are started; and at least one measuring point in other set of activated measuring points is positioned in a common monitoring area of the suspected measuring point and the adjacent measuring point of the suspected measuring point.
7. The method for detecting a fault in a compressed state of a stator core according to claim 6, wherein the feed-through screw at any position is provided with at most one measuring point.
8. A stator core compression state failure detection apparatus, comprising:
a judgment module configured to perform the following operations:
judging whether abnormal information exists in adjacent measuring point conditions of the suspected measuring points by taking the measuring points with the abnormal information in the measuring point group as suspected measuring points, wherein the measuring point group comprises a plurality of measuring points respectively arranged at different through screws, each measuring point is configured to measure axial forces of a plurality of through screws, and the distance between the adjacent measuring points is uncorrelated nearest distance;
if the adjacent measuring points of the suspected measuring points have no abnormal information, judging that the penetrating screw at the suspected measuring points is abnormal;
if the abnormal information exists in the adjacent measuring points of the suspected measuring points, judging that the through screw rod in the common monitoring area of the suspected measuring points and the adjacent measuring points of the suspected measuring points is abnormal.
9. A generator set monitoring system, characterized by a data acquisition module, a memory and a processor, the memory storing a computer program which, when executed by the processor, implements the stator core compaction state fault detection method according to any one of claims 1-7.
10. A computer-readable storage medium, having stored thereon a computer program that is loaded by a processor to perform the stator core compaction state fault detection method of any one of claims 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343387.5A CN114779073B (en) | 2022-03-31 | 2022-03-31 | Stator core compression state fault detection device, detection method, generator set monitoring system and computer readable storage medium |
| PCT/CN2023/081008 WO2023185429A1 (en) | 2022-03-31 | 2023-03-13 | Stator core pressing state fault detection method and apparatus, generator set monitoring system and computer-readable storage medium |
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| CN202210343387.5A CN114779073B (en) | 2022-03-31 | 2022-03-31 | Stator core compression state fault detection device, detection method, generator set monitoring system and computer readable storage medium |
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| CN114779073B true CN114779073B (en) | 2023-10-13 |
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| CN114779073B (en) * | 2022-03-31 | 2023-10-13 | 东方电气集团东方电机有限公司 | Stator core compression state fault detection device, detection method, generator set monitoring system and computer readable storage medium |
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| WO2023185429A1 (en) | 2023-10-05 |
| CN114779073A (en) | 2022-07-22 |
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