CN-121995206-A - Monitoring method for high-voltage MSD circuit break monitoring

CN121995206ACN 121995206 ACN121995206 ACN 121995206ACN-121995206-A

Abstract

The invention relates to the technical field of high-voltage circuit breaker monitoring, in particular to a monitoring method for high-voltage MSD circuit breaker monitoring, which comprises the following steps: setting a sampling window of the plug-in terminal assembly, recording a displacement track in the plug-in process, reading a voltage sequence, eliminating interference, matching a trigger signal with an action section, collecting vibration data, extracting interference characteristics and generating a high-voltage MSD monitoring result. According to the invention, through establishing a time sequence label sequence of the plugging action, each stage in the plugging process is accurately identified, the accuracy of action identification is improved by combining the calibration and time sequence binding of signals, the identification and response of abnormal conditions are enhanced by eliminating noise and interference, the dynamic monitoring of the plugging action is ensured, the plugging process can be analyzed with high precision in a complex environment, the monitoring precision, reliability and anti-interference capability of a system on a high-voltage plugging device are improved, and the continuous monitoring and accurate judgment of an operation state are ensured.

Inventors

ZHANG WEIHAO
Zou taihe
ZENG ZHIJIAN

Assignees

顺科智连技术股份有限公司
广东顺科连接技术有限公司

Dates

Publication Date: 20260508
Application Date: 20260123

Claims (10)

1. The monitoring method for the high-voltage MSD circuit break monitoring is characterized by comprising the following steps of: S1, setting an axial sampling window of a plug terminal assembly in a high-voltage MSD socket shell to comprise an image acquisition device, recording a continuous displacement track of the plug terminal assembly in the plug process, dividing an action section according to direction change, speed trend and stagnation point, and generating a contact action label sequence; s2, reading a voltage sequence from a high-voltage MSD low-voltage synchronous circuit according to the contact action label sequence, eliminating jitter and unstructured fluctuation, screening a descending starting point, positioning a time sequence position and generating a calibrated trigger signal group; S3, matching the calibrated trigger signal group with the action section of the contact action tag sequence, identifying whether to cover the plug action, reconstruct missing the binding point, extracting the time boundary and the trigger type, and generating a plug linkage fragment set; S4, extracting the plug linkage segment set, collecting vibration data of the high-voltage MSD shell, performing denoising and standardization processing on the triaxial signals, extracting slope change and amplitude transition, screening time periods meeting interference characteristics, and generating a signal interference interval set; S5, comparing the signal interference interval set with a trigger structure of the pulling action in the plug linkage segment set, identifying the non-triggered and misplaced trigger segments, judging a threshold according to a preset interference influence, verifying a monitoring result, and generating a high-voltage MSD monitoring result.
2. The method according to claim 1, wherein the contact action tag sequence includes an action type tag, a displacement change feature, a speed distribution pattern, and an action stagnation flag, the calibrated trigger signal group includes a signal start point, a boundary reference value, a stable change point, and a time sequence identifier, the plug linkage segment set includes a behavior interval map, a trigger point binding relationship, a response missing flag, and a start-stop correspondence tag, the signal interference interval set includes a slope change segment, an amplitude change segment, a covariate feature region, and a duration threshold segment, and the high voltage MSD monitoring result includes an unclamped segment, a trigger dislocation segment, a motion signal matching rate, and a circuit break monitoring decision value.
3. The method of claim 1, wherein the removing jitter and unstructured ripple refers to removing invalid signal disturbances in the voltage sequence caused by random noise and irregular variations.
4. The method of claim 1, wherein the screening for a period of time that satisfies the disturbance characteristic is a period of time that is extracted from the vibration signal and has both a slope change and an amplitude transition characteristic, and wherein the behavior segments affected by the disturbance are identified.
5. The method for monitoring high voltage MSD disconnection according to claim 1, wherein the specific steps of S1 are: S101, acquiring a plug image frame sequence of a plug terminal assembly along an axial channel of a socket shell, performing pixel intensity projection based on an inserting sheet edge region in an image, extracting an inserting sheet edge pixel coordinate, calling an edge coordinate of a full frame, and generating a displacement track sequence; S102, extracting a symbol change position index according to the symbol change of the displacement direction of the adjacent frames in the displacement track sequence, dividing the displacement track into sections, calculating the ratio of the displacement to the time of the sections, calling the ratio trend, and generating an action section division labeling set; S103, dividing a labeling set according to the action segments, extracting speed trend and boundary symbol direction, judging action states in the segments, marking the segments with consistent directions as inserting and extracting, marking the segments with zero speed as stopping, marking the segments with opposite directions as reversing, and establishing a contact action label sequence.
6. The method for monitoring high voltage MSD disconnection according to claim 1, wherein the specific steps of S2 are: S201, continuously reading a voltage data sequence from a low-voltage synchronous circuit of a high-voltage MSD according to a time range corresponding to a label in the contact action label sequence, dividing each segment of data into signal fragments according to a time index, and establishing a time fragment voltage sequence set corresponding to a time window of each label; S202, detecting a baseline level value in an initial boundary and a termination boundary interval based on a signal curve in the time segment voltage sequence set, and removing a segment interval with periodic jitter and noise fluctuation by combining a voltage variation amplitude and a signal oscillation period threshold value to obtain a stable boundary voltage signal set; s203, analyzing the change trend of the voltage curve according to the stable boundary voltage signal set, extracting the time point when the voltage first shows the continuous descending trend, carrying out time sequence calibration on the extracted time point according to the time sequence of the tag by combining the sequential position of the tag in the original time sequence, and establishing a trigger signal group after calibration.
7. The method for monitoring high voltage MSD disconnection according to claim 1, wherein the specific step of S3 is: S301, according to the trigger point time index in the calibrated trigger signal group, calling a label time period of a corresponding type in the contact action label sequence, judging whether each trigger point is positioned in a corresponding label section, and establishing a binding relation between the trigger point and a label in time sequence to generate a trigger label binding comparison set; s302, identifying insertion positions in an original label sequence according to a label time period of unfinished binding in the trigger label binding comparison set, constructing a vacant trigger point data frame, filling a missing corresponding relation, and calling an original binding relation to carry out combination correction to obtain a missing reconstruct relation table; S303, based on each binding relation in the missing reconstruct relation table, judging the coverage range of the start time and the stop time of the trigger point in the label section, extracting the start index and the end index as identification bits, aggregating the trigger and label index information, and establishing a plug linkage segment set.
8. The method for monitoring high voltage MSD disconnection according to claim 1, wherein the specific step of S4 is: S401, extracting each group of start-stop time periods in the plug linkage segment set, collecting a triaxial vibration signal sequence in a high-voltage MSD structure shell, performing linear trend elimination and mean normalization processing on channel signals based on a triaxial data channel, and obtaining a triaxial normalization signal sequence group corresponding to each group of linkage segments; s402, calculating the slope change rate, the amplitude transition amplitude and the covariance matrix characteristic value among three channels in continuous signals according to each group of linkage segment signals in the triaxial normalized signal sequence group, and aggregating the characteristic values into a multidimensional characteristic matrix to obtain a linkage segment disturbance characteristic set; S403, screening time intervals in which disturbance indexes meet threshold conditions according to the duration, slope and amplitude variation range in the linkage segment disturbance feature set and combining a preset duration threshold value and disturbance joint judgment conditions, and establishing a signal interference interval set; The disturbance joint judgment condition refers to that the slope change rate exceeds a specific threshold value and the amplitude transition amplitude is larger than a set value.
9. The method for monitoring high voltage MSD disconnection according to claim 1, wherein the specific step of S5 is: S501, calling a corresponding trigger structure and a label type in the plug linkage fragment set according to the start-stop time of each interference section in the signal interference section set, performing cross matching on sections which are triggered in all the plug labels and have no trigger position deviation, and marking whether the sections fall into the interference section or not to generate an interference influence matching list; s502, based on all mark segments in the interference influence matching list, counting the matching situation between the corresponding action type and the trigger response, and carrying out normalization processing on the ratio of the number of response missing and response offset behaviors to the total number of labels to obtain a matching integrity statistic value; S503, constructing a combined state judgment matrix according to the matching integrity statistic value and the trigger response state in the interference influence matching list, and performing assignment operation according to a preset coding rule such as a third-order matching priority method and a matrix cross numbering method according to a matching grade and an interference label mapping relation to establish a high-voltage MSD monitoring result.
10. The method of claim 9, wherein determining whether the signature falls within the interference zone indicates that a time range triggering an anomaly is overlapping with any signal interference zone.

Description

Monitoring method for high-voltage MSD circuit break monitoring Technical Field The invention relates to the technical field of high-voltage circuit breaker monitoring, in particular to a monitoring method for high-voltage MSD circuit breaker monitoring. Background The technical field of high-voltage circuit breaker monitoring relates to the identification, recording and analysis of the running state of a circuit breaker or a disconnecting switch in a high-voltage electric system, and the core matters comprise the detection of the switching-on and switching-off state of the high-voltage switch, the evaluation of mechanical life, the judgment of arc generation, the identification of the on-off state of a conductive loop and the like. The technical field is widely applied to the scenes of electric automobiles, rail transit, high-voltage distribution devices, power equipment operation and maintenance management and the like, and provides technical support for safe operation of a system by monitoring key parameters such as on-off behaviors, contact states, operation times and the like of a circuit breaker. The technical implementation of the method generally covers the contents of switch structure feature analysis, electric signal state acquisition, auxiliary contact configuration, mechanical structure gesture recognition, data acquisition, judgment strategy and the like, and has become an important component for high-voltage electric system intellectualization and safety improvement. The traditional monitoring method for high-voltage MSD circuit breaking monitoring refers to a monitoring mode for identifying a high-voltage on-off state of a manual service breaking device in a plugging state or not, and mainly comprises the steps of arranging a plugging terminal and a plug assembly, arranging a plug-in structure in the plug, arranging a female terminal assembly in a socket, inserting the plug into the socket to form a circuit to be closed, judging whether the circuit is on or not according to a physical contact relation, judging the circuit breaking state by assisting an auxiliary contact or a mechanical linkage device in a part of schemes, and realizing on-off state sensing by adopting an external mechanical detection mechanism, a contact auxiliary switch or a visual sensing structure and the like, so as to further perform signal transmission or alarm prompt. In the prior art, the on-off state judgment is carried out by relying on a contact structure, the action state recognition is limited to the result judgment, the dynamic analysis is difficult to realize on the whole plugging and unplugging process, the incomplete execution of plugging and unplugging actions, the middle pause or the lack of effective recognition of repeated operation are caused, the on-off judgment has delay and deviation risks, the signal acquisition strategy is single, the non-structural interference is difficult to effectively reject, the factors such as vibration impact and the like easily cause the signal misjudgment, the auxiliary switch or the external detection structure is obviously influenced by the installation precision and the structural stability, the direct mapping relation with a real action chain is lacked, the monitoring data is difficult to form a response system with high time sequence resolution, the continuity and the reliability of the on-off recognition are influenced, and the high-precision monitoring requirement on the operation state of the high-voltage plugging and unplugging device cannot be met. Disclosure of Invention In order to achieve the above purpose, the invention adopts the following technical scheme that the method for monitoring the high-voltage MSD circuit breaking comprises the following steps: S1, setting an axial sampling window of a plug terminal assembly in a high-voltage MSD socket shell to comprise an image acquisition device, recording a continuous displacement track of the plug terminal assembly in the plug process, dividing an action section according to direction change, speed trend and stagnation point, and generating a contact action label sequence; s2, reading a voltage sequence from a high-voltage MSD low-voltage synchronous circuit according to the contact action label sequence, eliminating jitter and unstructured fluctuation, screening a descending starting point, positioning a time sequence position and generating a calibrated trigger signal group; S3, matching the calibrated trigger signal group with the action section of the contact action tag sequence, identifying whether to cover the plug action, reconstruct missing the binding point, extracting the time boundary and the trigger type, and generating a plug linkage fragment set; S4, extracting the plug linkage segment set, collecting vibration data of the high-voltage MSD shell, performing denoising and standardization processing on the triaxial signals, extracting slope change and amplitude transition, screening time periods me