CN-122027513-A - Multi-mode communication-based solid-state transformer state collaborative monitoring method

CN122027513ACN 122027513 ACN122027513 ACN 122027513ACN-122027513-A

Abstract

The invention belongs to the technical field of power equipment state monitoring and intelligent communication, and particularly relates to a multi-mode communication-based solid-state transformer state collaborative monitoring method, which comprises the steps of collecting multi-source state data of a solid-state transformer through monitoring nodes, classifying the state data according to preset classification rules in high real-time, medium real-time and low real-time, simultaneously acquiring link quality parameters of a multi-mode communication link, dynamically selecting an optimal communication link for uploading data by combining a link quality prediction model, link state judgment and comprehensive evaluation constructed based on an autoregressive AR model so as to obtain a continuous, complete and high-reliability solid-state transformer operation state sequence; the invention realizes the self-adaptive data transmission of the solid-state transformer in a complex electromagnetic environment, and improves the real-time performance, reliability and stability of key state quantity monitoring.

Inventors

Liu Cigeng
YANG WEI
DING YUJIE
WU CAIXI
LIN QIAORONG
Liu Cida
LIU XIANWEN
LIU XIANQUN
LIU CIKUN
LIU CIJIE
DENG MEIHUA
SONG FAN
SU HONGYUAN

Assignees

广州广高高压电器有限公司

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (10)

1. A method for collaborative monitoring of a state of a solid state transformer based on multi-mode communication, the method comprising the steps of: s1, acquiring state data of a solid-state transformer based on a sensor; S2, determining the data category of the state data according to the classification rule; S3, acquiring link quality parameters of the multi-mode communication link, and determining a target communication link based on the data category and the link quality parameters; S4, uploading corresponding state data through the target communication link and carrying out data processing on the uploaded state data.
2. The method of claim 1, wherein the status data includes temperature data, voltage data, current data, and vibration signal data.
3. The method for collaborative monitoring of state of a solid state transformer based on multi-modal communication according to claim 1, wherein in step S2, the method for determining the data category of the state data according to classification rules specifically comprises: Calculating a characteristic value of the state data in the monitoring window; Determining a decision window based on the historical state data; and determining the data category of the state data based on the corresponding relation between the characteristic value and the judging window.
4. The method for collaborative monitoring of state of a solid state transformer based on multi-mode communications according to claim 1, further comprising the steps of: S310, constructing a link quality prediction model based on time sequence data of the link quality parameters; S320, judging the communication link according to the link quality change to generate an available link set; s330, constructing a link comprehensive evaluation model to determine a target communication link.
5. The method for collaborative monitoring of state of a solid state transformer based on multi-modal communication according to claim 4, wherein the link quality prediction model is constructed based on an AR model, and the functional relation expression of the model is as follows: Wherein the method comprises the steps of The prediction output of the model is based on the prediction of the link quality parameter at the next moment by the most recently acquired link quality parameter, a 0 is a bias term, a k is an autoregressive coefficient, and p is an autoregressive order.
6. The method for collaborative monitoring of state of a solid state transformer based on multi-mode communication according to claim 4, further comprising the step of: s321, setting different communication states for all communication links, wherein the different communication states correspond to different thresholds; s322, predicting each obtained original quality parameter based on the constructed link quality prediction model to obtain a predicted quality parameter; S323, generating an available link set based on the predicted quality parameter and the relation between the original quality parameter and the threshold value.
7. The method for collaborative monitoring of state of a solid state transformer based on multi-mode communications according to claim 4, further comprising the steps of: s331, obtaining quality parameters of all links in an available link set, and carrying out normalization processing on the quality parameters through inter-class index mapping; S332, constructing a comprehensive evaluation model based on the parameters after normalization processing, and selecting a target link based on the evaluation result.
8. The method for collaborative monitoring of state of a solid state transformer based on multi-modal communication according to claim 7, wherein in S331, the method for inter-class exponential mapping specifically comprises: extracting all links contained in the available link set, and taking the interval limit of the unavailable state as a selection boundary of the corresponding parameters; for any link in the available link set, acquiring the quality parameter of the link at the current moment, and carrying out class index mapping on each parameter: for the fugitive parameter, the parameter is subjected to inter-class index mapping to obtain a mapped parameter by the following modes: For the chemotaxis parameters, the parameters are subjected to inter-class index mapping to obtain mapped parameters by the following modes: Wherein the method comprises the steps of In order to obtain a mapped parameter result through inter-class index mapping, exp (·) represents an index function based on a natural constant e, and X i,r (t) represents an nth quality parameter acquired at an ith time on an ith link.
9. The method for collaborative monitoring of state of a solid state transformer based on multi-modal communication according to claim 7, wherein the comprehensive evaluation model is: Wherein, min (·) is a minimum function, E (i) represents an evaluation result of an ith link in the available link set, and n (·) is a cumulative calculation function; And calculating the evaluation results of all links in the available link set, arranging the generated sequences according to the descending order of the evaluation results, and selecting the first link in the sequences as a target link for data transmission each time.
10. A solid state transformer state collaborative monitoring system based on multi-mode communication, which is applicable to the solid state transformer state collaborative monitoring method based on multi-mode communication according to any one of claims 1-9, and is characterized in that the system comprises a state acquisition module, a category division module, a link judgment module and a data processing module; the state acquisition module is used for acquiring state data of the solid-state transformer through a monitoring node arranged in the solid-state transformer; The classification module classifies the state data according to classification rules to generate corresponding data classes; the link judging and selecting module is used for acquiring link quality parameters of the multi-mode communication link and determining a target communication link for uploading corresponding state data according to the data category and the link quality parameters; And the data processing module is used for uploading corresponding state data through the target communication links and processing the state data uploaded through different target communication links.

Description

Multi-mode communication-based solid-state transformer state collaborative monitoring method Technical Field The invention belongs to the technical field of power equipment state monitoring and intelligent communication, and particularly relates to a solid-state transformer state collaborative monitoring method based on multi-mode communication. Background The solid-state transformer is used as important power electronic equipment for new energy grid connection, electric traffic charging and power distribution network intellectualization in a power system, and comprises a plurality of key components such as a power semiconductor device, a high-frequency transformer, a control board, a capacitor unit and the like. In the long-term operation process, the high-frequency switch action, electromagnetic coupling, thermal stress change and complex load fluctuation all cause the dynamic change of multidimensional state quantities such as temperature, voltage, current, vibration and the like; Most of the existing solid-state transformer state monitoring adopts a single communication mode, such as CAN bus, RS485, zigBee or Wi-Fi. The communication mode has obvious limitations that the bandwidth is low, the real-time transmission of high-frequency vibration signals or high-frequency ripple data is difficult to support, the anti-interference capability is weak, the data is easy to lose due to switching noise and electromagnetic pulse interference in a strong electromagnetic environment of a solid-state transformer, the coverage area is limited, the multi-point synchronous uploading requirement of a distributed monitoring node is difficult to adapt, meanwhile, the service quality distinguishing capability of data in different types is lacking, and the transmission priority cannot be adjusted according to the real-time performance, the reliability and the data volume requirement of the data. Along with the increasing complexity of the solid-state transformer structure and the increasing monitoring dimension, the real-time performance and reliability of a single communication link cannot be ensured under the working conditions of high-frequency, multi-node and multi-type data concurrent uploading. The design of the transformer on-line monitoring system based on multi-source information fusion and the development of software [ J ] the computer application and software propose to monitor the running state of the transformer in real time by various monitoring indexes such as vibration, current, partial discharge and the like, and transmit the data to a monitoring platform through a single communication link to realize state evaluation. However, such a system still depends on a single communication mode, cannot dynamically select and optimize channels for different state data types and link quality, does not have the capability of dynamically selecting an optimal communication link according to data types and link quality, lacks a scheduling mechanism for predicting link quality changes, evaluating states and comprehensively scoring decisions, and is difficult to ensure that stable and reliable data transmission service is provided in complex scenes such as electromagnetic interference, power grid disturbance or load mutation. Therefore, a method for monitoring the state of a solid-state transformer, which can integrate multi-mode communication links, dynamically determine an optimal transmission path according to data category characteristics and link quality parameters, and cooperatively process data uploaded by the multi-link, is needed to improve the real-time performance, reliability and integrity of data transmission, so as to realize high-precision collaborative monitoring of the running state of the solid-state transformer. Disclosure of Invention The invention aims to provide a solid-state transformer state collaborative monitoring method and system based on multi-mode communication, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition. In order to achieve the above object, according to an aspect of the present invention, there is provided a solid-state transformer state collaborative monitoring method based on multi-mode communication, The solid-state transformer state collaborative monitoring method based on multi-mode communication comprises the following steps: s1, acquiring state data of a solid-state transformer based on a sensor; S2, determining the data category of the state data according to the classification rule; S3, acquiring link quality parameters of the multi-mode communication link, and determining a target communication link based on the data category and the link quality parameters; S4, uploading corresponding state data through the target communication link and carrying out data processing on the uploaded state data. Further, in S1, the state data includes temperature data, voltage data, current data, and vib