CN-121500785-B - Quincuncial contact regulation and control method and system for circuit breaker handcart

CN121500785BCN 121500785 BCN121500785 BCN 121500785BCN-121500785-B

Abstract

The invention discloses a quincuncial contact regulation and control method and system of a circuit breaker handcart, which relate to the technical field of electric equipment regulation and control and comprise the following steps of extracting contact multisource characteristics based on acquired contact operation history data and predicting a contact expansion state sequence; the method comprises the steps of performing contact simulation control based on a contact expansion state sequence to generate a contact dynamic response, applying disturbance to the contact simulation control, and executing an countermeasure training update simulation control process to generate a contact control strategy, wherein the countermeasure training comprises taking synchronicity among contact fingers as a constraint condition, and the synchronicity is obtained based on contact dynamic response analysis. The method is used for solving the problems of poor safety and inaccurate regulation and control of the plum blossom contact predictive control means.

Inventors

WANG PEIWEI
PENG NA
ZHOU WEI
YAO WEI
DONG HAOHAO
ZHANG CHI
WANG QIN
ZHANG YUANXI
WANG JUN
WU ZHENBING
HE XIANG
ZHOU HAIHANG
Ning Zehua
HAO JIAN
WEI JINGJING

Assignees

安徽方能电气技术有限公司
国网安徽省电力有限公司颍上县供电公司

Dates

Publication Date: 20260512
Application Date: 20260114

Claims (7)

1. The quincuncial contact regulation and control method of the circuit breaker handcart is characterized by comprising the following steps of: Extracting contact multisource features based on the acquired contact operation history data; The method comprises the steps of pre-constructing an integrated prediction model, inputting contact multisource characteristics into the integrated prediction model, outputting a predicted contact state, and performing time sequence connection on the predicted contact state and the current contact state to obtain a contact expansion state sequence, wherein the integrated prediction model comprises a model set formed by a short-term time sequence model, a long-term time sequence model and a nonlinear time sequence model, and dynamic weights are configured for the models; Performing contact simulation control based on a contact expansion state sequence to generate a contact dynamic response, wherein the contact expansion state sequence is discretized and divided into a plurality of state intervals; the method comprises the steps of simulating and executing a preset contact control strategy, counting contact state transition probability, arranging the contact state transition probability into a contact state transition probability matrix according to a state interval, and carrying out smooth optimization treatment; The method comprises the steps of applying disturbance to the contact simulation control, executing an countermeasure training update simulation control process, and generating a contact control strategy, wherein the method comprises the steps of obtaining mechanical fatigue and contact response difference quantity to construct a loss function, generating self-disturbance based on a loss function gradient, applying self-disturbance to a contact expansion state sequence to obtain disturbance state data, inputting the disturbance state data into a preset strategy generation model, outputting the countermeasure contact control strategy, and simulating to obtain an countermeasure contact dynamic response; The countermeasure training comprises taking synchronicity among contact fingers as a constraint condition, wherein the synchronicity is obtained based on contact dynamic response analysis.
2. The quincuncial contact regulation method of the circuit breaker cart of claim 1, wherein the extracting the contact multisource feature based on the acquired contact operation history data comprises: Carrying out modal decomposition on nonlinear time sequence data in the contact operation history data to obtain contact modal components with different frequencies; Screening the contact modal components according to the energy duty ratio of the contact modal components of each frequency and the correlation between the contact modal components, and extracting statistical characteristics; and fusing the statistical features with linear time sequence data in the contact operation history data to obtain the contact multi-source features.
3. The method for adjusting and controlling the tulip contact of the circuit breaker handcart according to claim 2, wherein said configuring the dynamic weights for each model comprises: Extracting the emphasis characteristic of each model in the integrated prediction model; and (3) respectively processing the emphasis characteristics of each model to obtain the basic weight of each model, and combining the obtained prediction uncertainty to obtain the dynamic weight.
4. The method for regulating and controlling tulip contacts of a circuit breaker trolley according to claim 3, wherein the method for obtaining mechanical fatigue comprises the steps of: Mapping according to the contact operation history data to obtain the mechanical stress of the spring, and combining the characteristics of the spring material to obtain single damage of the spring; accumulating the single damage of the spring to obtain the spring fatigue; Obtaining dynamic wear degree through time sequence prediction based on time sequence data of contact operation history data; and fusing the spring fatigue and the dynamic wear to obtain the mechanical fatigue.
5. The method for quincuncial contact regulation of the circuit breaker cart of claim 4, wherein the obtaining the mechanical fatigue and the contact response difference amount to construct the loss function comprises: quantifying basic positive rewards according to the difference between the dynamic response of the antagonistic contacts and the contact response between preset contact state base lines; Applying a positive perturbation reward according to the influence of the perturbation on the dynamic response of the contact; applying a negative fatigue reward according to the mechanical fatigue caused by the current operation; And fusing the positive rewards with the negative rewards to obtain a rewarding function of the strategy generation model.
6. The quincuncial contact regulating method of the circuit breaker handcart of claim 5, wherein the synchronicity between the contact fingers is a constraint condition, the synchronicity is obtained based on a contact dynamic response analysis, and the method comprises the following steps: collecting vibration signals and temperature data of each plum blossom contact finger after executing a contact control strategy; envelope analysis is carried out on the vibration signals, and the mechanical impact moment of each contact finger is identified; Carrying out correlation statistics according to the mechanical impact time and the temperature data of each contact finger to obtain the synchronism among the contact fingers; based on the synchronicity between the fingers, an antagonistic contact control strategy is constrained.
7. A system using the tulip contact-regulating method of the circuit breaker trolley according to any one of claims 1-6, characterized by comprising: The state prediction module is used for extracting the multi-source characteristics of the contact based on the acquired contact operation history data and predicting a contact expansion state sequence; the response simulation module is used for performing contact simulation control based on the contact expansion state sequence to generate a contact dynamic response; and the countermeasure training module is used for applying disturbance to the contact simulation control, executing a countermeasure training update simulation control process and generating a contact control strategy, wherein the countermeasure training comprises taking synchronicity among contact fingers as a constraint condition, and the synchronicity is obtained based on contact dynamic response analysis.

Description

Quincuncial contact regulation and control method and system for circuit breaker handcart Technical Field The invention relates to the technical field of electric equipment regulation and control, in particular to a plum blossom contact regulation and control method and system of a circuit breaker handcart. Background The circuit breaker handcart is used as key equipment in a power system, and the reliable regulation and control of the quincuncial contacts of the circuit breaker handcart are directly related to the operation performance, the service life and the safe and stable operation of a power grid of the circuit breaker. The plum blossom contact bears huge electric, thermal and mechanical stress in the switching-on and switching-off processes, and the contact state, the synchronism and the wear degree of the plum blossom contact directly influence the conductivity and the switching-off capability of the circuit breaker. Therefore, the precise regulation and control of the quincuncial contacts is one of core technologies for guaranteeing the efficient operation of the circuit breaker. Traditional tulip contact regulation methods rely mainly on rule-based control strategies or simple feedback mechanisms. Although the methods are simple to realize, the methods have obvious limitations, the methods cannot process multi-source heterogeneous data, so that the regulation and control decision lacks comprehensiveness, in addition, the fixed rule-based methods are difficult to adapt to the dynamically-changing working conditions, misoperation or regulation and control lag easily occur, and the traditional methods lack predictive capability, cannot identify contact wear or fatigue trend in advance, so that the maintenance is not timely, and the fault risk is increased. The method, the device and the terminal equipment for evaluating the contact state of the plum blossom contact of the high-voltage switch cabinet, for example, the high-voltage switch cabinet disclosed by the invention with the publication number of CN114720860B, comprise the steps of calculating the temperature rise limit value of the plum blossom contact under the current operation condition of the plum blossom contact according to the equipment operation parameters of the high-voltage switch cabinet, determining the minimum limit value of the contact pressure of a single contact finger of the plum blossom contact, calculating the maximum limit value of the contact pressure of the single contact finger of the plum blossom contact, and establishing a plum blossom contact state evaluation standard based on the temperature rise limit value, the minimum limit value and the maximum limit value of the contact pressure of the plum blossom contact. The invention discloses a method and a device for monitoring the state of a handcart breaker on line, for example, the invention has the bulletin number of CN118795326B, and relates to the technical field of the handcart breaker; the method comprises the steps of obtaining an open-circuit position state analysis model trained in advance through a video boundary box method, carrying out state monitoring on an open-circuit position by utilizing the open-circuit position state analysis model, obtaining a closed-circuit position state analysis model trained in advance through simulation modeling contact force analysis, carrying out state monitoring on a closed-circuit position by utilizing the closed-circuit position state analysis model, obtaining an open-circuit position state monitoring result and a closed-circuit position state monitoring result, and sending an alarm on an abnormal state by combining an unknown position. In the above disclosed technical solution, at least the following technical problems exist: The prior art judging standard is too simplified, the variable working conditions cannot be adapted, the method is poor in robustness, the stability is insufficient in practical application, and the regulation strategy is lack of foresight. The present invention proposes a solution to the above-mentioned problems. Disclosure of Invention In order to overcome the defects of the prior art, the embodiment of the invention provides a quincuncial contact regulation and control method of a circuit breaker handcart, which is used for obtaining a contact expansion state sequence, performing simulation control based on the contact expansion state sequence, applying disturbance to the contact simulation control, and executing an countermeasure training update simulation control process to obtain a control strategy with foresight so as to solve the problems of poor safety and inaccurate regulation and control of a quincuncial contact predictive control means. In order to achieve the above purpose, the present invention provides the following technical solutions: A quincuncial contact regulation and control method of a circuit breaker handcart comprises the following steps of extracting contact multisource charact