CN-121995210-A - Method and system for identifying state abnormality of circuit breaker

CN121995210ACN 121995210 ACN121995210 ACN 121995210ACN-121995210-A

Abstract

The invention discloses a method and a system for identifying state anomalies of a circuit breaker, wherein the method comprises the steps of obtaining position remote signaling, three-phase current telemetry, energy storage action signals and SOE timestamp data of the circuit breaker, determining a circuit breaker wiring mode, a circuit breaker switching-on/off state, a topology connection state, a three-phase current value, energy storage time length after the circuit breaker acts, an energy storage timeout signal, an energy storage time change trend and the SOE timestamp of the three-phase switching-on/off action of the circuit breaker, identifying the switching-on/off position states according to the circuit breaker wiring mode, the circuit breaker switching-on/off state, the topology connection state and the three-phase current value, identifying spring energy storage anomalies according to the energy storage time length after the circuit breaker acts, the energy storage timeout signal and the energy storage time change trend, and identifying different switching-on/off serious periods according to the SOE timestamp of the three-phase switching-on/off action of the circuit breaker. When the corresponding criterion condition is met, triggering a corresponding alarm, diagnosing abnormal reasons and outputting fault processing suggestions.

Inventors

Che Pengyuan
LIU GE
ZUO JIANXUN
TAN TINGFANG

Assignees

南京国电南自电网自动化有限公司

Dates

Publication Date: 20260508
Application Date: 20260402

Claims (10)

1. A method for identifying a circuit breaker condition anomaly, comprising: acquiring position remote signaling, three-phase current telemetry, energy storage action signals and SOE timestamp data of a circuit breaker; Determining a circuit breaker wiring mode, a circuit breaker opening and closing state, a topology communication state, a three-phase current value, an energy storage time length after the circuit breaker acts, an energy storage timeout signal, an energy storage time change trend and an SOE timestamp of the circuit breaker three-phase opening or closing action according to the position remote signaling, the three-phase current telemetry, the energy storage action signal and the SOE timestamp data of the circuit breaker; carrying out switching-on/off position state identification according to a circuit breaker wiring mode, a circuit breaker switching-on/off state, a topology communication state and a three-phase current value, and obtaining a switching-on/off position state identification result; according to the energy storage time length, the energy storage timeout signal and the energy storage time change trend after the action of the circuit breaker, carrying out spring energy storage abnormality identification to obtain a spring energy storage abnormality identification result; And identifying the different periods of the opening and closing severity according to SOE time stamps of the three-phase opening/closing actions of the circuit breaker, and obtaining identification results of the different periods of the opening and closing severity.
2. The method for identifying abnormal states of a circuit breaker according to claim 1, wherein the step of identifying the states of the switching on/off positions according to the wiring mode of the circuit breaker, the switching on/off states of the circuit breaker, the topology communication states and the three-phase current values to obtain the identification results of the states of the switching on/off positions comprises the steps of: if the circuit breaker wiring mode is a double bus wiring mode, the circuit breaker displays switching-off and topological communication, and any phase current of a circuit is greater than 0.7 times of the running phase current before switching-off, and the switching-off position is judged to be incorrect; If the circuit breaker connection mode is a double-bus connection mode, when a power transmission of a power-off line in a double-circuit line is performed, the circuit breaker at the side displays switching-on and topological communication, any phase current at the side is smaller than 0.2 time of the maximum phase current of the circuit breaker, meanwhile, the phase current of a continuous operation line in the double-circuit line is larger than 1.5 times of the maximum phase current in the other two phases, and the switching-on position is judged to be incorrect.
3. The method for identifying abnormal states of a circuit breaker according to claim 1, wherein the step of identifying the states of the switching on/off positions according to the wiring mode of the circuit breaker, the switching on/off states of the circuit breaker, the topology communication states and the three-phase current values to obtain the identification results of the states of the switching on/off positions comprises the steps of: If the circuit breaker connection mode is a three-half connection mode, the circuit breaker displays opening and topological communication, any one phase current is greater than 0.7 times of the running phase current before opening, and meets the line confluence with the other circuit breaker, and the opening position is judged to be incorrect: If the circuit breaker connection mode is a three-half connection mode, the circuit breaker displays switching-on and topological connection, any one phase current is smaller than 0.2 times of the maximum phase current in the other two phases of the circuit breaker, and meets the line confluence with the other circuit breaker, and the switching-on position is judged to be incorrect.
4. The method for identifying abnormal state of a circuit breaker according to claim 1, wherein the step of identifying abnormal state of the spring energy storage according to the time length of energy storage after the action of the circuit breaker, the energy storage timeout signal and the energy storage time change trend, and obtaining the identification result of abnormal state of the spring energy storage comprises the following steps: if the energy storage action signal does not appear in the first time threshold after the circuit breaker is shifted, judging that the spring does not store energy; If an energy storage timeout signal appears or the energy storage time is larger than the energy storage timeout threshold of the circuit breaker, judging that the spring energy storage is overtime; If the ratio of the average value of the energy storage time of the near three times to the average value of the energy storage time of the previous three times is larger than a set threshold value, the energy storage time of the spring is judged to be continuously increased.
5. The method for identifying abnormal states of a circuit breaker according to claim 1, wherein the identifying of different periods of serious opening and closing according to SOE time stamps of three-phase opening/closing actions of the circuit breaker to obtain identifying results of different periods of serious opening and closing comprises: calculating the time difference of any two-phase opening/closing action according to the SOE time stamp of the three-phase opening/closing action of the circuit breaker, and determining the maximum value of the time difference of the opening/closing action; If the maximum value of the brake-separating action time difference is larger than the threshold value of the brake-separating action time difference, judging that the brake separation is serious in different periods; and if the maximum value of the closing action time difference is larger than the threshold value of the closing action time difference, judging different periods of closing.
6. The method of claim 1, wherein obtaining the position telemetry, the three-phase current telemetry, the stored energy operation signal, and the SOE timestamp data of the circuit breaker further comprises preprocessing the position telemetry, the three-phase current telemetry, the stored energy operation signal, and the SOE timestamp data of the circuit breaker, wherein the preprocessing comprises at least one of data cleaning, time alignment, outlier rejection, and smoothing filtering.
7. The circuit breaker status anomaly identification method of claim 1, further comprising: And carrying out corresponding early warning according to the switching-on and switching-off position state identification result, the spring energy storage abnormality identification result and the switching-on and switching-off serious different-period identification result.
8. The device for identifying the abnormal state of the circuit breaker is characterized by comprising a processor and a storage medium; The storage medium is used for storing instructions; the processor is operative according to the instructions to perform the method according to any one of claims 1 to 7.
9. A computer readable storage medium having stored thereon a computer program/instruction, characterized in that the computer program/instruction, when executed by a processor, implements the steps of the circuit breaker state anomaly identification method of any one of claims 1 to 7.
10. A computer apparatus/device/system comprising: a memory for storing computer programs/instructions; A processor for executing the computer program/instructions to implement the steps of the circuit breaker state anomaly identification method of any one of claims 1 to 7.

Description

Method and system for identifying state abnormality of circuit breaker Technical Field The invention relates to a method and a system for identifying abnormal states of a circuit breaker, and belongs to the technical field of monitoring and diagnosis of power equipment. Background The circuit breaker is a key control and protection device in the power system, and the opening and closing position, the energy storage state and the opening and closing synchronism of the circuit breaker are directly related to safe and stable operation of a power grid. However, the existing monitoring system mainly depends on a single remote signaling quantity or a simple threshold alarm, and has the following technical problems: 1. Position misjudgment, namely when the auxiliary contact point of the circuit breaker and the mechanical transmission part lose linkage, the state of the moving contact point and the static contact point cannot be truly reflected, so that protection is misoperated or refused, and the position monitoring and protection functions of the circuit breaker are affected; 2. The energy storage abnormality is hidden, namely when the spring mechanism is abnormal such as the damage of an energy storage indication cam and a micro switch, the energy storage is easy to overtime, but the signals can be automatically reset in a short time, are easy to submerge in a large amount of accompanying information in a daily monitoring mode, and are difficult to discover in time; 3. the different switching-on and switching-off periods are caused by insufficient mechanical characteristics of the breaker body, so that zero sequence current is generated in the different switching-on and switching-off periods, but monitoring staff cannot calculate the three-phase action time difference of the breaker in real time, and abnormality of the different switching-on and switching-off periods is difficult to find. Therefore, a method for identifying abnormal state of a breaker with logic reasoning capability, which can integrate multi-source data, is needed to improve the state sensing capability and early warning accuracy of the device. Disclosure of Invention In view of at least one of the technical problems, the invention provides a method and a system for identifying the state abnormality of a circuit breaker, which realize intelligent identification and early warning of three typical abnormal states of an opening and closing position error, an energy storage abnormality and an opening and closing in different periods by comprehensively analyzing multidimensional data such as the position, the current, the energy storage duration, the SOE time and the like of the circuit breaker. In order to achieve the above purpose, the invention is realized by adopting the following technical scheme. In a first aspect, the present invention provides a method for identifying a state anomaly of a circuit breaker, including: acquiring position remote signaling, three-phase current telemetry, energy storage action signals and SOE timestamp data of a circuit breaker; Determining a circuit breaker wiring mode, a circuit breaker opening and closing state, a topology communication state, a three-phase current value, an energy storage time length after the circuit breaker acts, an energy storage timeout signal, an energy storage time change trend and an SOE timestamp of the circuit breaker three-phase opening or closing action according to the position remote signaling, the three-phase current telemetry, the energy storage action signal and the SOE timestamp data of the circuit breaker; carrying out switching-on/off position state identification according to a circuit breaker wiring mode, a circuit breaker switching-on/off state, a topology communication state and a three-phase current value, and obtaining a switching-on/off position state identification result; according to the energy storage time length, the energy storage timeout signal and the energy storage time change trend after the action of the circuit breaker, carrying out spring energy storage abnormality identification to obtain a spring energy storage abnormality identification result; And identifying the different periods of the opening and closing severity according to SOE time stamps of the three-phase opening/closing actions of the circuit breaker, and obtaining identification results of the different periods of the opening and closing severity. In some embodiments, according to a circuit breaker connection mode, a circuit breaker switching-on/off state, a topology communication state and a three-phase current value, performing switching-on/off position state identification to obtain a switching-on/off position state identification result, including: if the circuit breaker wiring mode is a double bus wiring mode, the circuit breaker displays switching-off and topological communication, and any phase current of a circuit is greater than 0.7 times of the running phase current before switchi