CN-122000829-A - Multi-section timing over-current control method for automatic recloser and recloser thereof

CN122000829ACN 122000829 ACN122000829 ACN 122000829ACN-122000829-A

Abstract

The invention relates to the technical field of distribution networks, in particular to a multi-section timing and over-current control method of an automatic recloser and the recloser thereof, comprising a control cabinet, wherein a controller for bearing an instantaneous response module, a data collection module, a feature extraction module, a similarity matching module and a historical database is arranged in the control cabinet, each parameter in a circuit is monitored in real time, when an abnormality occurs, the corresponding parameter is calculated and analyzed, the similarity between the corresponding parameter and the historical data is judged, the approximate type of the fault is judged, and then the corresponding closing action is carried out according to the judged fault type.

Inventors

SHEN YIN
YING SUFEI
SHEN JIANJUN
Ma Lindi
ZOU SHOUQIAO
ZHU JIE

Assignees

宁波鑫鑫鑫寅电气有限公司

Dates

Publication Date: 20260508
Application Date: 20260121

Claims (8)

1. The multi-section timing overflow control method of the automatic recloser is characterized by comprising the following steps: S1, acquiring circuit parameters and switching parameters in real time in the process of monitoring the circuit state by the recloser, and respectively transmitting the corresponding parameters to time-limited data storage banks in the instantaneous reaction module and the data collection module; S2, comparing an instantaneous value of three-phase current in the circuit with a set current value by the instantaneous reaction module, and continuously starting two actions of opening and closing once when data abnormality occurs, wherein the data abnormality has three sections and adopts three opening and closing modes, which are respectively executed immediately, delayed according to a set first set time and delayed according to a set second set time; S3, when the circuit parameter data is abnormal, sending a signal with a time stamp to a data collection module, and calling all previous data and partial future data in a time window which takes the time stamp as a center in a data storage library when the data collection module is again called, and sending the previous data and partial future data to a feature extraction module, wherein the feature extraction module calculates transient feature, steady state and harmonic feature parameters after receiving a fault data packet, and extracts the feature of the transient feature, steady state and harmonic feature parameters to form a fault data feature packet; s4, transmitting the extracted data to a similarity matching module, judging the similarity with the data in the historical database, and carrying out permanent fault, transient fault and type fault incapable of being judged on the data packet with the extracted current data characteristics; s5, switching on the permanent fault at most twice, switching on the transient fault and the fault of which the type cannot be judged at most five times and three times respectively, setting different interval time for each switching on, locking a switching-off state and waiting for maintenance personnel when the fault is not solved after the maximum switching-on times are reached, and ending the fault solving; Synchronously feeding back the final type of the fault to a history database.
2. The method for multi-segment timed-period over-current control of an automatic recloser according to claim 1, wherein the circuit parameters in S1 include instantaneous values of three-phase current in the circuit and instantaneous values of three-phase voltage in the circuit, the switching parameters include a switch position state and a switch energy storage state, all data parameters are packed and transferred to the data collection module and time stamped, and then stored in the time-limited data repository, and data of the instantaneous values of three-phase current in the circuit, the switch position state and the switch energy storage state are transferred to the transient response module.
3. The multi-stage timing overcurrent control method of the automatic recloser according to claim 2, wherein Ia, ib and Ic in the three-phase currents are respectively compared with set current values Ia Is provided with 、Ib Is provided with 、Ic Is provided with , when any one of the three-phase currents Ia, ib and Ic meets the conditions, the three-phase currents need to be synchronously compared with the three set current values, different response speeds are used for delaying the opening and closing actions when different set current values meet, and when a plurality of set adjustments are met in a short time, the action with short delay is preferentially adopted.
4. The method for multi-segment timing and overflow control of an automatic recloser according to claim 3, wherein the transient response module is further provided with a state toggle signal block, and when the transient response module is triggered to detect abnormal data and perform opening and closing actions, a signal with a time stamp is synchronously sent to the data collection module.
5. The method of claim 4, wherein the feature extraction module calculates current abrupt change, current abrupt change rate, current waveform parameters, fundamental wave effective values, negative sequence currents, zero sequence currents, total harmonic distortion, and forms a plurality of feature parameters into a fault data feature packet according to the corresponding parameter data.
6. The method for multi-segment timing and overflow control of an automatic recloser according to claim 5, wherein the similarity determination is performed by performing data preprocessing, calculating the similarity of two dimensions respectively by two calculation methods of euclidean distance similarity and cosine similarity, and taking the final similarity: Final similarity = 0.4 euclidean distance similarity +0.6 cosine similarity.
7. A recloser for use in the automatic recloser multi-segment timed flow control method of claims 1-6, comprising: The circuit breaker comprises a circuit breaker body (11), wherein the circuit breaker body (11) performs opening and closing actions of current when receiving signals, and a detector for detecting three-phase current and voltage in a circuit is further arranged in the circuit breaker body (11); The circuit breaker comprises a circuit breaker body (11) and a detector, wherein the circuit breaker body is provided with a control cabinet (12) electrically connected with the circuit breaker body (11), and a controller which is used for bearing an instantaneous reaction module, a data collection module, a feature extraction module, a similarity matching module, a historical database and a cache database for storing other temporary files and data is arranged in the control cabinet (12) and used for receiving circuit parameter signals and controlling the circuit breaker body (11).
8. The recloser according to claim 7, wherein the control cabinet (12) is further provided with a design module for adjusting parameters in the controller and a display for displaying an interface.

Description

Multi-section timing over-current control method for automatic recloser and recloser thereof Technical Field The invention relates to the technical field of reclosers, in particular to a multi-section timing and time-limiting overcurrent control method of an automatic recloser and the recloser. Background The recloser is generally a circuit breaker with reclosing, namely, the recloser has circuit protection, can be quickly opened and closed again after encountering sudden transient faults so as to continuously carry out power transmission, and is generally protected in a three-section overcurrent protection mode, namely, three sections of current values are detected and corresponding opening actions are carried out on current, the first section is the current which is overlarge and is directly opened, the second section is the opening after timing, and the third section is the opening after timing for a long time so as to solve the transient faults in the circuit; However, the recloser can only detect the current in real time, then mechanically perform actions such as opening and closing, and for some transient faults which may take longer time and naturally eliminate faults, the opening and closing may also be locked, i.e. the recloser can timely react to the transient current, but for what type of abnormality the abnormality may belong to, no targeted feedback can be performed, so that the use effect of the recloser is limited. Therefore, an automatic recloser multi-stage timing and time-limiting overcurrent control method and a recloser thereof are needed, and the problem that the recloser cannot make more accurate judgment for different faults is solved. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a multi-section timing and time-limiting overcurrent control method of an automatic recloser and the recloser thereof, which are characterized in that the current and voltage parameters in a circuit are detected, then are analyzed and processed to obtain other characteristic parameters, are compared with historical data to judge the fault type, and are processed in a targeted manner so as to solve the fault problem at the highest speed. The technical aim of the invention is achieved by the following technical scheme that the automatic recloser multi-section time-limiting overcurrent control method and the recloser thereof comprise the steps that S1, circuit parameters and switch parameters are obtained in real time in the process of monitoring the circuit state by the recloser, and corresponding parameters are respectively transmitted to time-limiting data storage libraries in an instantaneous response module and a data collection module; S2, comparing an instantaneous value of three-phase current in the circuit with a set current value by the instantaneous reaction module, and continuously starting two actions of opening and closing once when data abnormality occurs, wherein the data abnormality has three sections and adopts three opening and closing modes, which are respectively executed immediately, delayed according to a set first set time and delayed according to a set second set time; S3, when the circuit parameter data is abnormal, sending a signal with a time stamp to a data collection module, and calling all previous data and partial future data in a time window which takes the time stamp as a center in a data storage library when the data collection module is again called, and sending the previous data and partial future data to a feature extraction module, wherein the feature extraction module calculates transient feature, steady state and harmonic feature parameters after receiving a fault data packet, and extracts the feature of the transient feature, steady state and harmonic feature parameters to form a fault data feature packet; s4, transmitting the extracted data to a similarity matching module, judging the similarity with the data in the historical database, and carrying out permanent fault, transient fault and type fault incapable of being judged on the data packet with the extracted current data characteristics; s5, switching on the permanent fault at most twice, switching on the transient fault and the fault of which the type cannot be judged at most five times and three times respectively, setting different interval time for each switching on, locking a switching-off state and waiting for maintenance personnel when the fault is not solved after the maximum switching-on times are reached, and ending the fault solving; And synchronously feeding back the final type of the fault to a history database. The invention is further arranged that the circuit parameters in the S1 comprise instantaneous values of three-phase current in the circuit and instantaneous values of three-phase voltage in the circuit, the switch parameters comprise a switch position state and a switch energy storage state, all data parameters are packaged and transmitted to th