Ring main unit circuit breaker status monitoring method, device, computer equipment and medium

Abstract

The present application relates to a ring network cabinet circuit breaker state monitoring method, device, computer equipment, and storage medium. The method includes: obtaining multiple monitoring data through multiple signal sensors; obtaining first electrical quantity monitoring data and obtaining opening and closing coil state monitoring results through an opening and closing coil state monitoring module; obtaining acceleration monitoring data, vibration monitoring data, and first temperature monitoring data through a switch contact stroke state monitoring module, and obtaining switch contact stroke state monitoring results; obtaining second electrical quantity monitoring data, pressure monitoring data, and second temperature monitoring data through an energy storage motor state monitoring module, and obtaining energy storage motor state monitoring results; using the opening and closing coil state monitoring results, the switch contact stroke state monitoring results, and the energy storage motor state monitoring results as state monitoring results for the target ring network cabinet circuit breaker. The use of this method can improve the accuracy of ring network cabinet circuit breaker state monitoring.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment monitoring, and in particular to a method, device, computer equipment, storage medium and computer program product for monitoring the status of a ring main unit circuit breaker. Background Art

[0002] With the development of power equipment monitoring technology, a state monitoring technology for ring main unit circuit breakers has emerged. As an important equipment in the power system, the working state of the ring main unit is closely related to the power supply quality of the distribution network, and the circuit breaker is an important part of the ring main unit. Therefore, the state monitoring of the circuit breaker of the ring main unit can detect potential faults in advance, thereby improving the operation reliability of the ring main unit.

[0003] In traditional technology, the status monitoring of ring main units mainly focuses on monitoring aspects such as the travel time of knife switch contacts and the current of the opening and closing coils. There are few types of monitoring parameters, so the accuracy of existing ring main unit circuit breaker status monitoring is low. Summary of the invention

[0004] Based on this, it is necessary to provide a ring main unit circuit breaker status monitoring method, device, computer equipment, computer readable storage medium and computer program product that can improve the accuracy of ring main unit circuit breaker status monitoring in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for monitoring the state of a ring main unit circuit breaker, the method comprising:

[0006] Acquire multiple monitoring data for the target ring main unit circuit breaker by installing multiple signal sensors on the target ring main unit circuit breaker;

[0007] Acquire, from the plurality of monitoring data, first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0008] By means of a switch contact stroke state monitoring module, the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact are acquired from the plurality of monitoring data, and the switch contact stroke state monitoring result of the target ring main unit circuit breaker is acquired according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0009] By means of the energy storage motor state monitoring module, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor are obtained from the plurality of monitoring data, and a state monitoring result of the energy storage motor of the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0010] The state monitoring result of the opening and closing coil, the state monitoring result of the switch contact stroke, and the state monitoring result of the energy storage motor are used as the state monitoring result for the target ring main unit circuit breaker.

[0011] In one of the embodiments, the state monitoring result of the opening and closing coil of the target ring main unit circuit breaker is obtained according to the first electrical quantity monitoring data, including: determining the first target time interval for the opening and closing action of the opening and closing coil from multiple time intervals divided according to preset time intervals according to the first electrical quantity monitoring data; obtaining the previous time interval of the first target time interval and the left endpoint time of the previous time interval, and obtaining the first electrical quantity signal acquisition interval based on the left endpoint time and the preset first electrical quantity signal acquisition time; obtaining the first electrical quantity monitoring data collected in the first electrical quantity signal acquisition interval to form a first electrical quantity monitoring signal; obtaining the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, and obtaining the opening and closing coil state monitoring result according to the first electrical quantity signal characteristic extreme value point and a pre-designed electrical quantity signal evaluation model for the opening and closing coil.

[0012] In one of the embodiments, the first target time interval for the opening and closing action of the opening and closing coil is determined from multiple time intervals divided according to preset time intervals based on the first electrical quantity monitoring data, including: obtaining the current time interval and the first electrical quantity monitoring data collected in the current time interval; summing the first electrical quantity monitoring data collected in the current time interval to obtain the sum of the first electrical quantity monitoring data corresponding to the current time interval; if the sum of the first electrical quantity monitoring data is greater than or equal to the preset electrical quantity threshold, the current time interval is used as the first target time interval; obtaining the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, including: determining each first electrical quantity monitoring data and the previous first electrical quantity monitoring data of each first electrical quantity monitoring data; obtaining a preset noise compensation constant; obtaining the slope information corresponding to the first electrical quantity monitoring signal based on the each first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each first electrical quantity monitoring data, and the noise compensation constant; obtaining the first electrical quantity signal characteristic extreme value point based on the slope information.

[0013] In one of the embodiments, the switch contact travel state monitoring result for the target ring network cabinet circuit breaker is obtained based on the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data, including: determining a first target time interval for the opening and closing action of the opening and closing coil from a plurality of time intervals divided according to preset time intervals, and based on the first target time interval, obtaining an acceleration signal collection interval and a vibration signal collection interval corresponding to the target time interval; obtaining the acceleration monitoring data collected in the acceleration signal collection interval to form an acceleration monitoring signal, and obtaining the vibration monitoring data collected in the vibration signal collection interval to form a vibration monitoring signal; based on the acceleration monitoring signal, obtaining the travel characteristic points of the switch contact, and based on the vibration monitoring signal, obtaining the The vibration monitoring signal corresponds to a vibration monitoring signal characteristic extreme point; obtains the first temperature characteristic data corresponding to the first temperature monitoring data; obtains a first sub-stroke state monitoring result for the switch contact according to the stroke characteristic point and a pre-designed stroke state evaluation model for the switch contact; obtains a second sub-stroke state monitoring result for the switch contact according to the vibration monitoring signal characteristic extreme point and a pre-designed vibration state evaluation model for the switch contact; obtains a third sub-stroke state monitoring result for the switch contact according to the first temperature characteristic data and a pre-designed temperature state evaluation model for the switch contact; uses the first sub-stroke state monitoring result, the second sub-stroke state monitoring result, and the third sub-stroke state monitoring result as the switch contact stroke state monitoring result.

[0014] In one embodiment, the stroke characteristic points of the switch contact are obtained based on the acceleration monitoring signal, including: based on the acceleration monitoring signal, obtaining a speed signal and a displacement stroke signal that match the acceleration monitoring signal; determining the opening moment and closing moment of the switch contact according to the acceleration monitoring signal and the speed signal; using the speed signal and the displacement stroke signal to obtain the speed characteristic points and the displacement stroke signal characteristic points corresponding to the opening moment and the closing moment, respectively, and using the speed characteristic points and the displacement stroke signal characteristic points as the stroke characteristic points of the switch contact.

[0015] In one embodiment, the state monitoring result of the energy storage motor for the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data, including: determining, according to the second electrical quantity monitoring data, a second target time interval for the energy storage motor to start working from a plurality of time intervals divided according to preset time intervals; obtaining a previous time interval of the second target time interval, and a left endpoint time of the previous time interval, and obtaining the energy storage motor working interval based on the left endpoint time and the preset energy storage motor working time; obtaining the second electrical quantity monitoring data collected within the energy storage motor working interval to form a second electrical quantity monitoring signal, and obtaining the pressure monitoring data collected within the energy storage motor working interval to form a pressure monitoring signal; obtaining the second electrical quantity signal characteristic extreme value point corresponding to the second electrical quantity monitoring signal, the pressure signal characteristic extreme value point corresponding to the pressure monitoring signal, and obtaining the second electrical quantity signal characteristic extreme value point corresponding to the pressure monitoring signal according to the storage The method comprises the following steps: obtaining the output power of the energy storage motor in the working range of the energy storage motor by using the second electrical quantity monitoring data collected within the working range of the energy storage motor; obtaining the second temperature characteristic data corresponding to the second temperature monitoring data; obtaining the first sub-energy storage motor state monitoring result for the energy storage motor according to the characteristic extreme value point of the second electrical quantity signal, the output power and a pre-designed electrical quantity signal evaluation model for the energy storage motor; obtaining the second sub-energy storage motor state monitoring result for the energy storage motor according to the characteristic extreme value point of the pressure signal and a pre-designed pressure value evaluation model for the opening and closing spring; obtaining the third sub-energy storage motor state monitoring result for the energy storage motor according to the second temperature characteristic data and a pre-designed temperature state evaluation model for the energy storage motor; and taking the first sub-energy storage motor state monitoring result, the second sub-energy storage motor state monitoring result and the third sub-energy storage motor state monitoring result as the energy storage motor state monitoring result.

[0016] In one embodiment, the signal sensor includes: at least one of a voltage sensor, a current sensor, an acceleration sensor, a temperature sensor, a vibration sensor, and a pressure sensor; the multiple monitoring data for the target ring main unit circuit breaker are obtained by installing multiple signal sensors on the target ring main unit circuit breaker, including: obtaining the first electrical quantity monitoring data through the voltage sensor and the current sensor installed on the opening and closing coil; obtaining the acceleration monitoring data through the acceleration sensor installed at the end of the pull rod of the moving contact of the target ring main unit circuit breaker; obtaining the vibration monitoring data through the vibration sensor installed on the contact transmission mechanism of the moving contact; obtaining the first temperature monitoring data through the temperature sensor installed on the axis of the transmission main shaft of the moving contact; obtaining the second electrical quantity monitoring data through the voltage sensor and the current sensor installed on the energy storage motor; obtaining the pressure monitoring data through the pressure sensor installed on the opening and closing spring of the energy storage motor; obtaining the second temperature monitoring data through the temperature sensor installed on the energy storage motor.

[0017] In a second aspect, the present application further provides a ring main unit circuit breaker status monitoring device, the device comprising:

[0018] A monitoring data acquisition module, used to acquire a plurality of monitoring data for the target ring main unit circuit breaker through a plurality of signal sensors installed on the target ring main unit circuit breaker;

[0019] An opening and closing coil monitoring module is used to obtain first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from the plurality of monitoring data through the opening and closing coil state monitoring module, and obtain a state monitoring result of the opening and closing coil of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0020] A switch contact monitoring module, configured to obtain, from the plurality of monitoring data, acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, vibration monitoring data of the switch contact, and first temperature monitoring data of the switch contact through the switch contact travel state monitoring module, and obtain a switch contact travel state monitoring result for the target ring main unit circuit breaker according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0021] An energy storage motor monitoring module is used to obtain, from the plurality of monitoring data, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor through the energy storage motor state monitoring module, and obtain a state monitoring result of the energy storage motor of the target ring main unit circuit breaker according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0022] The circuit breaker status monitoring module is used to use the state monitoring results of the opening and closing coils, the state monitoring results of the switch contact stroke, and the state monitoring results of the energy storage motor as the state monitoring results for the target ring main unit circuit breaker.

[0023] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0024] Acquire multiple monitoring data for the target ring main unit circuit breaker by installing multiple signal sensors on the target ring main unit circuit breaker;

[0025] Acquire, from the plurality of monitoring data, first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0026] By means of a switch contact stroke state monitoring module, the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact are acquired from the plurality of monitoring data, and the switch contact stroke state monitoring result of the target ring main unit circuit breaker is acquired according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0027] By means of the energy storage motor state monitoring module, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor are obtained from the plurality of monitoring data, and a state monitoring result of the energy storage motor of the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0028] The state monitoring result of the opening and closing coil, the state monitoring result of the switch contact stroke, and the state monitoring result of the energy storage motor are used as the state monitoring result for the target ring main unit circuit breaker.

[0029] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0030] Acquire multiple monitoring data for the target ring main unit circuit breaker by installing multiple signal sensors on the target ring main unit circuit breaker;

[0031] Acquire, from the plurality of monitoring data, first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0032] By means of a switch contact stroke state monitoring module, the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact are acquired from the plurality of monitoring data, and the switch contact stroke state monitoring result of the target ring main unit circuit breaker is acquired according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0033] By means of the energy storage motor state monitoring module, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor are obtained from the plurality of monitoring data, and a state monitoring result of the energy storage motor of the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0034] The state monitoring result of the opening and closing coil, the state monitoring result of the switch contact stroke, and the state monitoring result of the energy storage motor are used as the state monitoring result for the target ring main unit circuit breaker.

[0035] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0036] Acquire multiple monitoring data for the target ring main unit circuit breaker by installing multiple signal sensors on the target ring main unit circuit breaker;

[0037] Acquire, from the plurality of monitoring data, first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0038] By means of a switch contact stroke state monitoring module, the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact are acquired from the plurality of monitoring data, and the switch contact stroke state monitoring result of the target ring main unit circuit breaker is acquired according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0039] By means of the energy storage motor state monitoring module, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor are obtained from the plurality of monitoring data, and a state monitoring result of the energy storage motor of the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0040] The state monitoring result of the opening and closing coil, the state monitoring result of the switch contact stroke, and the state monitoring result of the energy storage motor are used as the state monitoring result for the target ring main unit circuit breaker.

[0041] The above-mentioned ring main unit circuit breaker state monitoring method, device, computer equipment, storage medium and computer program product obtain multiple monitoring data for the target ring main unit circuit breaker through multiple signal sensors installed on the target ring main unit circuit breaker; obtain the first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from the multiple monitoring data through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result for the target ring main unit circuit breaker according to the first electrical quantity monitoring data; obtain the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact from the multiple monitoring data through the switch contact travel state monitoring module, and obtain the acceleration monitoring data of the switch contact, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact according to the acceleration monitoring data; The speed monitoring data, the vibration monitoring data, and the first temperature monitoring data are used to obtain the switch contact stroke state monitoring result for the target ring network cabinet circuit breaker; through the energy storage motor state monitoring module, the second electrical quantity monitoring data of the energy storage motor for the target ring network cabinet circuit breaker, the pressure monitoring data of the opening and closing spring during the operation of the energy storage motor, and the second temperature monitoring data of the energy storage motor are obtained from multiple monitoring data, and the energy storage motor state monitoring result for the target ring network cabinet circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data; the opening and closing coil state monitoring result, the switch contact stroke state monitoring result, and the energy storage motor state monitoring result are used as the state monitoring result for the target ring network cabinet circuit breaker. The ring main unit circuit breaker state monitoring method provided in the present application can obtain multiple monitoring data through multiple installed signal sensors, and can monitor the state of the opening and closing coils through the opening and closing coil state monitoring module, monitor the switch contact stroke state through the switch contact stroke state monitoring module, and monitor the energy storage motor state through the energy storage motor state monitoring module, so as to realize the state monitoring of the ring main unit circuit breaker according to the above monitoring results. Compared with the prior art, which has fewer types of state monitoring parameters for the ring main unit, the present application can obtain monitoring data through multiple sensors to realize multiple state monitoring of the ring main unit, thereby improving the accuracy of the ring main unit circuit breaker state monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of a flow chart of a method for monitoring the state of a ring main unit circuit breaker in one embodiment;

[0043] Figure 2 A schematic diagram of a process for obtaining a state monitoring result of a closing and opening coil in one embodiment;

[0044] Figure 3 A schematic diagram of a flow chart for obtaining a switch contact travel state monitoring result in one embodiment;

[0045] Figure 4A schematic diagram of a process for obtaining a state monitoring result of an energy storage motor in one embodiment;

[0046] Figure 5 It is a structural schematic diagram of an online monitoring system for mechanical characteristics of a ring main unit circuit breaker in an application example;

[0047] Figure 6 It is a flow chart of a method for monitoring the state of a closing and opening coil in an application example;

[0048] Figure 7 It is a flow chart of a method for monitoring the travel state of a switch moving contact in an application example;

[0049] Figure 8 It is a flow chart of a method for monitoring the travel state of a moving contact of a switch in another application example;

[0050] Fig. 9 It is a flow chart of a method for monitoring the state of an energy storage motor in an application example;

[0051] Fig.10 is a flow chart of a method for monitoring the state of an energy storage motor in another application example;

[0052] Fig.11 It is a structural block diagram of a ring main unit circuit breaker status monitoring device in one embodiment;

[0053] Fig.12 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] In one embodiment, Figure 1 As shown, a ring main unit circuit breaker status monitoring method is provided. This embodiment uses the method applied to a terminal as an example for illustration. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0056] Step S101: Acquire a plurality of monitoring data for a target ring main unit circuit breaker through a plurality of signal sensors installed on the target ring main unit circuit breaker.

[0057] Among them, the target ring main cabinet circuit breaker refers to the ring main cabinet circuit breaker that needs to perform circuit breaker status monitoring. In this embodiment, a signal sensor can be installed in the target ring main cabinet circuit breaker. The above-mentioned multiple signal sensors can be used to collect different types of monitoring data for the target ring main cabinet circuit breaker. When performing status monitoring of the target ring main cabinet circuit breaker, corresponding multiple monitoring data can be obtained from the above-mentioned multiple signal sensors according to the set sampling period.

[0058] Step S102, obtaining first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from multiple monitoring data through the opening and closing coil status monitoring module, and obtaining the opening and closing coil status monitoring result of the target ring main unit circuit breaker based on the first electrical quantity monitoring data.

[0059] The opening and closing coil state monitoring module is a module for realizing state monitoring of the opening and closing coil of the ring main unit circuit breaker, and the first electrical quantity monitoring data refers to the electrical quantity monitoring data for the opening and closing coil, for example, it can be the current data or voltage data for the opening and closing coil, etc. Specifically, the opening and closing coil state monitoring module can filter out the first electrical quantity monitoring data for the opening and closing coil from the multiple monitoring data obtained in step S101, and use the above first electrical quantity monitoring data to obtain the opening and closing coil state monitoring result for the target ring main unit circuit breaker.

[0060] Step S103, through the switch contact travel state monitoring module, obtain the acceleration monitoring data of the switch contacts of the target ring main unit circuit breaker, the vibration monitoring data of the switch contacts, and the first temperature monitoring data of the switch contacts from multiple monitoring data, and obtain the switch contact travel state monitoring result of the target ring main unit circuit breaker based on the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data.

[0061] The switch contact travel state monitoring module is a module for monitoring the switch contact state of the target ring network cabinet circuit breaker, and the first temperature monitoring data is the temperature data of the switch contact. In this embodiment, the switch contact travel state monitoring module can filter out the acceleration monitoring data, vibration monitoring data and the above-mentioned first temperature monitoring data for the switch contact from the various monitoring data obtained in step S101, so that the obtained acceleration monitoring data, vibration monitoring data and the above-mentioned first temperature monitoring data can be used to realize the monitoring of the switch contact travel state.

[0062] Step S104, through the energy storage motor status monitoring module, obtain from multiple monitoring data the second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, the pressure monitoring data of the opening and closing spring during the operation of the energy storage motor, and the second temperature monitoring data of the energy storage motor, and obtain the energy storage motor status monitoring result for the target ring main unit circuit breaker based on the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data.

[0063] The energy storage motor status monitoring module refers to a module used to monitor the status of the energy storage motor of the target ring network cabinet circuit breaker, the second electrical quantity monitoring data refers to the electrical quantity monitoring data for the energy storage motor, for example, it can be the voltage data or current data of the energy storage motor in the working state, and the second temperature monitoring data refers to the temperature monitoring data of the energy storage motor. Specifically, the energy storage motor status monitoring module can filter out the electrical quantity monitoring data for the energy storage motor, that is, the second electrical quantity monitoring data, the pressure monitoring data of the opening and closing spring of the energy storage motor during the working period, and the temperature monitoring data of the energy storage motor, that is, the second temperature monitoring data, from the multiple monitoring data obtained in step S101, so that the energy storage motor status monitoring result for the target ring network cabinet circuit breaker can be obtained through the above-mentioned second electrical quantity monitoring data, pressure monitoring data and second temperature monitoring data.

[0064] Step S105, using the state monitoring results of the opening and closing coils, the state monitoring results of the switch contact stroke, and the state monitoring results of the energy storage motor as the state monitoring results for the target ring main unit circuit breaker.

[0065] Finally, after the opening and closing coil state monitoring module obtains the opening and closing coil state monitoring result in step S102, the switch contact stroke state monitoring module obtains the switch contact stroke state monitoring result in step S103, and the energy storage motor state monitoring module obtains the energy storage motor state monitoring result in step S104, the above monitoring results can be used as the state monitoring results of the target ring main unit circuit breaker, thereby obtaining multiple state monitoring results of the above target ring main unit circuit breaker.

[0066] In the above-mentioned ring main unit circuit breaker state monitoring method, multiple monitoring data for the target ring main unit circuit breaker are obtained by installing multiple signal sensors on the target ring main unit circuit breaker; the first electrical quantity monitoring data for the opening and closing coil of the target ring main unit circuit breaker is obtained from the multiple monitoring data by the opening and closing coil state monitoring module, and the opening and closing coil state monitoring result for the target ring main unit circuit breaker is obtained according to the first electrical quantity monitoring data; the acceleration monitoring data for the switch contact of the target ring main unit circuit breaker, the vibration monitoring data for the switch contact, and the first temperature monitoring data for the switch contact are obtained from the multiple monitoring data by the switch contact stroke state monitoring module, and the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data for the switch contact are obtained according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data for the switch contact are obtained according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data for the switch contact. The method comprises the following steps: obtaining the switch contact stroke state monitoring result for the target ring network cabinet circuit breaker by using the measurement data and the first temperature monitoring data; obtaining the second electrical quantity monitoring data of the energy storage motor for the target ring network cabinet circuit breaker, the pressure monitoring data of the opening and closing spring during the operation of the energy storage motor, and the second temperature monitoring data of the energy storage motor from the multiple monitoring data through the energy storage motor state monitoring module, and obtaining the energy storage motor state monitoring result for the target ring network cabinet circuit breaker according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data; and using the opening and closing coil state monitoring result, the switch contact stroke state monitoring result, and the energy storage motor state monitoring result as the state monitoring result for the target ring network cabinet circuit breaker. The ring main unit circuit breaker state monitoring method provided in the present application can obtain multiple monitoring data through multiple installed signal sensors, and can monitor the state of the opening and closing coils through the opening and closing coil state monitoring module, monitor the switch contact stroke state through the switch contact stroke state monitoring module, and monitor the energy storage motor state through the energy storage motor state monitoring module, so as to realize the state monitoring of the ring main unit circuit breaker according to the above monitoring results. Compared with the prior art, which has fewer types of state monitoring parameters for the ring main unit, the present application can obtain monitoring data through multiple sensors to realize multiple state monitoring of the ring main unit, thereby improving the accuracy of the ring main unit circuit breaker state monitoring.

[0067] In one embodiment, Figure 2 As shown, step S102 may further include:

[0068] Step S201: According to the first electrical quantity monitoring data, a first target time interval for the opening and closing coil to perform an opening and closing action is determined from a plurality of time intervals divided according to preset time intervals.

[0069] The preset time interval can be a preset time interval for monitoring the opening and closing actions of the opening and closing coils. For example, the time interval can be set to 5ms, and the first target time interval refers to the time interval in which the opening and closing actions of the opening and closing coils occur. In this embodiment, the terminal can divide the time interval according to the preset time interval. Taking 5ms as an example, (t0, t0+5ms) and (t0+5ms, t0+10ms) can be divided into different time intervals respectively, and the first target time interval refers to the time interval in which the opening and closing actions of the opening and closing coils are detected in the above time intervals. For example, if the opening and closing action is detected in the time interval of (t0+5ms, t0+10ms), then this time interval can be used as the first target time interval.

[0070] Step S202, obtaining the previous time interval of the first target time interval and the left endpoint time of the previous time interval, and obtaining the first electrical quantity signal collection interval based on the left endpoint time and the preset first electrical quantity signal collection time.

[0071] The previous time interval of the first target time interval refers to the time interval corresponding to the previous time interval of the first target time interval. For example, if the first target time interval is (t0+5ms, t0+10ms), then the previous time interval is (t0, t0+5ms). The left endpoint time refers to the left endpoint time corresponding to the previous time interval, that is, t0. The preset first electrical quantity signal acquisition time refers to the pre-designed signal acquisition duration for acquiring the first electrical quantity signal. This duration is used to ensure that a complete opening and closing electrical quantity signal can be acquired. The corresponding first electrical quantity signal acquisition interval can be obtained through the above-mentioned left endpoint time and the first electrical quantity signal acquisition time.

[0072] For example, the left endpoint time is t0, and the first electrical quantity signal acquisition time can be set to T, and T can be set to a value greater than 120ms to ensure the complete acquisition of the opening and closing electrical quantity signals corresponding to the opening and closing actions occurring in the time interval (t0+5ms, t0+10ms). Therefore, the first electrical quantity signal acquisition interval can be determined as (t0, t0+10ms+T).

[0073] Step S203, acquiring first electrical quantity monitoring data collected within a first electrical quantity signal collection interval to form a first electrical quantity monitoring signal.

[0074] The first electrical quantity monitoring signal refers to a monitoring signal formed by multiple first electrical quantity monitoring data. In this embodiment, since the first electrical quantity monitoring data is obtained from the signal sensor at a certain sampling frequency, the first electrical quantity monitoring data obtained in the first electrical quantity signal acquisition interval may be multiple discrete first electrical quantity monitoring data. After obtaining the above multiple discrete first electrical quantity monitoring data, the above multiple discrete first electrical quantity monitoring data may be fitted to obtain the first electrical quantity monitoring signal.

[0075] Step S204, obtaining the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, and obtaining the opening and closing coil state monitoring result according to the first electrical quantity signal characteristic extreme value point and a pre-designed electrical quantity signal evaluation model for the opening and closing coil.

[0076] The first electrical quantity signal characteristic extreme point refers to the extreme point of the first electrical quantity monitoring signal obtained in step S203, which can be the maximum point or minimum point of the signal curve corresponding to the first electrical quantity monitoring signal. The electrical quantity signal evaluation model for the opening and closing coil is a pre-designed model for evaluating the electrical quantity signal of the opening and closing coil. The model can be used to determine whether the electrical quantity signal of the opening and closing coil is normal. In this embodiment, after obtaining the first electrical quantity signal characteristic extreme point, the electrical quantity signal evaluation model can be used to monitor the state of the opening and closing coil. If the monitored state of the opening and closing coil is normal, it can be saved and used as a subsequent training sample for the electrical quantity signal evaluation model. If the state of the opening and closing coil is abnormal, an alarm signal can be triggered, and the above abnormal information can be recorded for manual judgment whether the above electrical quantity signal evaluation model needs to be updated.

[0077] In this embodiment, after obtaining the first electrical quantity monitoring data, the target time interval for the opening and closing action of the opening and closing coil can be further determined, and based on the interval, the collection interval for collecting the first electrical quantity signal can be obtained. After that, the first electrical quantity monitoring signal can be obtained according to the above collection interval, thereby realizing the analysis of the first electrical quantity monitoring signal. Through the above method, the state of the opening and closing coil can be monitored using the first electrical quantity data, thereby improving the accuracy of the opening and closing coil state monitoring.

[0078] Furthermore, step S201 may further include: obtaining the current time interval and the first electrical quantity monitoring data collected within the current time interval; summing the first electrical quantity monitoring data collected within the current time interval to obtain the sum of the first electrical quantity monitoring data corresponding to the current time interval; if the sum of the first electrical quantity monitoring data is greater than or equal to a preset electrical quantity threshold, the current time interval is used as the first target time interval.

[0079] In this embodiment, the sampling interval of the first electrical quantity monitoring data is smaller than the time interval between each time interval. For example, the interval between time intervals is 5ms, and the sampling interval can be set to 0.2ms. Then, for a time interval, 25 first electrical quantity monitoring data can be included. The current time interval refers to any one of the above multiple time intervals. In this embodiment, after obtaining the current time interval, the first electrical quantity monitoring data included in the current time interval can be summed to obtain the sum of the first electrical quantity monitoring data corresponding to each time interval. Afterwards, the sum of the first electrical quantity monitoring data can be compared with the pre-set electrical quantity threshold. If the sum of the first electrical quantity monitoring data of a current time interval is greater than the pre-set electrical quantity threshold, then the current time interval can be used as the first target time interval.

[0080] For example, the time interval (t0+5ms, t0+10ms) includes multiple first electrical quantity monitoring data, and after summing the multiple first electrical quantity monitoring data, if the sum result is greater than or equal to the preset electrical quantity threshold, then (t0+5ms, t0+10ms) can be set as the first target time interval for the opening and closing action to occur.

[0081] In this embodiment, the first electrical quantity monitoring data collected in each time interval can be summed up, and the time interval for the opening and closing action can be determined by using the relationship between the summation result and the preset electrical quantity threshold. In this way, the accuracy of the determined time interval for the opening and closing action can be improved.

[0082] In addition, step S204 may further include: determining each first electrical quantity monitoring data and the previous first electrical quantity monitoring data of each first electrical quantity monitoring data; obtaining a preset noise compensation constant; obtaining slope information corresponding to the first electrical quantity monitoring signal according to each first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each first electrical quantity monitoring data, and the noise compensation constant; and obtaining the characteristic extreme value point of the first electrical quantity signal based on the slope information.

[0083] After the first electrical quantity monitoring signal is formed, each first electrical quantity monitoring data corresponding to the first electrical quantity monitoring signal and the previous first electrical quantity monitoring data corresponding to each first electrical quantity monitoring data can also be obtained, and a preset noise compensation constant can be used to eliminate the situation where the slope of the local acquisition signal is opposite to the slope of the actual signal due to noise interference in the data acquisition process. Therefore, the slope information corresponding to the first electrical quantity monitoring signal can be obtained through the previous first electrical quantity monitoring data of each first electrical quantity monitoring data and the noise compensation constant. Afterwards, the above slope information can be used to obtain the characteristic extreme value point of the first electrical quantity signal.

[0084] For example, the slope information corresponding to the first electrical quantity monitoring signal can be calculated by the following formula:

[0085] F(i)=I(i)-I(i-1)+K

[0086] Among them, F(i) represents the slope information corresponding to the first electrical quantity monitoring signal, I(i) represents any first electrical quantity monitoring data in the first electrical quantity monitoring signal, I(i-1) represents the previous first electrical quantity monitoring data of any first electrical quantity monitoring data, and K represents the noise compensation constant. Through the above method, the slope information corresponding to each first electrical quantity monitoring data can be calculated and used as the slope information corresponding to the above-mentioned first electrical quantity monitoring signal.

[0087] Afterwards, the slope information corresponding to each of the above-mentioned first electrical quantity monitoring data can also be used to determine the corresponding characteristic extreme value points, which can be done by normalizing the polarity of F(i). By setting the G(i) function, when F(i)>0, G(i)=1; when F(i)<0, G(i)=0. Analyze G(i). When G(i)=1 and G(i+1)=0, the first electrical quantity monitoring signal may have a maximum value; when G(i)=0 and G(i+1)=1, the first electrical quantity monitoring signal may have a minimum value. Therefore, the characteristic extreme value points of the first electrical quantity signal can be obtained in the above manner.

[0088] In this embodiment, the characteristic extreme value point of the first electrical quantity signal can be obtained by obtaining the slope information of the first electrical quantity monitoring signal, and the slope information can be obtained by using each first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each first electrical quantity monitoring data, and a preset noise compensation constant. This constant can be used to eliminate the situation where the slope of the local collected signal is opposite to the slope polarity of the actual signal due to noise interference in the data collection process, thereby improving the accuracy of the characteristic extreme value point of the first electrical quantity signal.

[0089] In one embodiment, Figure 3 As shown, step S103 may further include:

[0090] Step S301, determining a first target time interval for the opening and closing coil to perform opening and closing actions from a plurality of time intervals divided according to preset time intervals, and based on the first target time interval, acquiring an acceleration signal collection interval and a vibration signal collection interval that are compatible with the target time interval.

[0091] Among them, the acceleration signal collection interval refers to the time interval used to collect acceleration monitoring signals, and the vibration signal collection interval refers to the time interval used to collect vibration monitoring signals. In this embodiment, after obtaining the first target time interval for the opening and closing actions of the opening and closing coils through a method such as step S201, the first electrical quantity signal collection interval can be further determined according to the steps of step S202, and the determined first electrical quantity signal collection interval is used as the acceleration signal collection interval and the vibration signal collection interval.

[0092] For example, the first target time interval obtained by step S201 is (t0+5ms, t0+10ms), and the first electrical quantity signal acquisition interval can be determined as (t0, t0+10ms+T). Then, the above-mentioned acceleration signal acquisition interval and vibration signal acquisition interval can be set to (t0, t0+10ms+T).

[0093] Step S302, acquiring acceleration monitoring data collected in the acceleration signal collection interval to form an acceleration monitoring signal, and acquiring vibration monitoring data collected in the vibration signal collection interval to form a vibration monitoring signal.

[0094] The acceleration monitoring signal refers to a monitoring signal formed by multiple acceleration monitoring data, while the vibration monitoring signal refers to a monitoring signal formed by multiple vibration monitoring data. In this embodiment, the acceleration monitoring data and the vibration monitoring data can also be obtained from the signal sensor according to a certain sampling frequency. Therefore, in the acceleration signal acquisition interval and the vibration signal acquisition interval, the acceleration monitoring data and the vibration monitoring data obtained can be multiple discrete acceleration monitoring data and vibration monitoring data. Therefore, after determining the acceleration signal acquisition interval, the acceleration monitoring data located in the acceleration signal acquisition interval can be fitted to obtain the acceleration monitoring signal. At the same time, when obtaining the vibration signal acquisition interval, the vibration monitoring data collected in the vibration signal acquisition interval can also be fitted to obtain the vibration monitoring signal.

[0095] Step S303, obtaining the travel characteristic points of the switch contact based on the acceleration monitoring signal, and obtaining the vibration monitoring signal characteristic extreme value points corresponding to the vibration monitoring signal based on the vibration monitoring signal.

[0096] The travel characteristic points of the switch contacts refer to the travel information characteristic points of the switch contacts, for example, they may be the velocity characteristic points and displacement travel signal characteristic points corresponding to the characteristic extreme points at the opening and closing moments respectively, while the vibration monitoring signal characteristic extreme points refer to the extreme points of the vibration monitoring signal. In this embodiment, after obtaining the acceleration monitoring signal, the travel characteristic points of the switch contacts of the target ring network cabinet circuit breaker can be obtained based on the acceleration monitoring signal. At the same time, based on the vibration monitoring signal, the vibration monitoring signal characteristic extreme points of the vibration monitoring signal can be obtained.

[0097] Step S304, obtaining first temperature characteristic data corresponding to the first temperature monitoring data.

[0098] The first temperature monitoring data is the temperature monitoring data of the switch contact, and the temperature monitoring data can be collected according to a preset temperature monitoring data collection cycle, so there can be multiple first temperature monitoring data. The first temperature characteristic data refers to the characteristic data corresponding to each first temperature monitoring data, for example, it can include the first temperature monitoring data at the current moment, and the change amount of the first temperature monitoring data at the current moment.

[0099] For example, the first temperature monitoring data at the current moment may be TEMPA(i). Then the corresponding first temperature characteristic data includes not only TEMPA(i) itself, but also the change amount ΔTEMPA(i) of the first temperature monitoring data, and ΔTEMPA(i)=TEMPA(i)-TEMPA(i-1).

[0100] Step S305, obtaining a first sub-stroke state monitoring result for the switch contact according to the stroke characteristic point and a pre-designed stroke state evaluation model for the switch contact; obtaining a second sub-stroke state monitoring result for the switch contact according to the characteristic extreme point of the vibration monitoring signal and a pre-designed vibration state evaluation model for the switch contact; obtaining a third sub-stroke state monitoring result for the switch contact according to the first temperature characteristic data and a pre-designed temperature state evaluation model for the switch contact;

[0101] Step S306: taking the first sub-stroke state monitoring result, the second sub-stroke state monitoring result, and the third sub-stroke state monitoring result as the switch contact stroke state monitoring result.

[0102] Among them, the stroke state evaluation model is a model used to evaluate the stroke state of the switch contact, the vibration state evaluation model is a model used to evaluate the vibration state of the switch contact, and the temperature state evaluation model refers to a model used to evaluate the temperature state of the switch contact. The first sub-stroke state monitoring result is the evaluation result of the stroke state of the switch contact, while the second sub-stroke state monitoring result refers to the evaluation result of the vibration state of the switch contact, and the third sub-stroke state monitoring result is the evaluation result of the temperature state of the switch contact.

[0103] Specifically, after obtaining the travel characteristic points of the switch contacts, the characteristic extreme points of the vibration monitoring signal and the first temperature characteristic data in steps S303 and S304 respectively, the above characteristic data can be evaluated respectively through corresponding evaluation models to obtain the corresponding sub-stroke state monitoring results, and the above-mentioned sub-stroke state monitoring results can also be used as the travel state monitoring results for the switch contacts.

[0104] In this embodiment, when monitoring and evaluating the travel state of the switch contact, the travel state, vibration state, and temperature state of the switch contact can be evaluated at the same time, thereby further improving the integrity of monitoring and evaluating the travel state of the switch contact.

[0105] Furthermore, step S303 may further include: based on the acceleration monitoring signal, obtaining a speed signal and a displacement stroke signal that match the acceleration monitoring signal; determining the opening and closing times of the switch contacts according to the acceleration monitoring signal and the speed signal; using the speed signal and the displacement stroke signal to obtain the speed characteristic points and the displacement stroke signal characteristic points corresponding to the opening and closing times, respectively, and using the speed characteristic points and the displacement stroke signal characteristic points as the stroke characteristic points of the switch contacts.

[0106] Among them, the speed signal can be obtained by integrating the acceleration monitoring signal by discrete Simpson method, and the displacement stroke signal can be obtained by integrating the speed signal by discrete Simpson method after obtaining the speed signal. The opening moment and the closing moment refer to the moment when the moving contact and the static contact of the switch contact are just separated or just merged, respectively. The speed characteristic point refers to the characteristic point of the speed signal, which can be the speed at the opening moment and the closing moment, and the displacement stroke signal characteristic point refers to the displacement stroke signal characteristic point, which can be parameters such as contact opening distance and contact overtravel, where the contact opening distance is the displacement value of the contact from the steady state to the just closed position, and the contact overtravel is the displacement of the contact from the just closed position to the closed steady state. The above-mentioned speed characteristic points and displacement stroke signal characteristic points can be used as the stroke characteristic points of the switch contact.

[0107] Specifically, after obtaining the acceleration monitoring signal, the acceleration monitoring signal can be subjected to discrete Simpson's integration processing to obtain the velocity signal, and the velocity signal can be subjected to discrete Simpson's integration processing to obtain the displacement stroke signal. Moreover, based on the above-mentioned acceleration monitoring signal and velocity signal, the opening and closing moments of the switch contacts can be determined. This step can be that when the circuit breaker is in the opening action, before the corresponding moment of the maximum opening speed, the corresponding moment of the maximum opening acceleration is recorded as the opening moment; when the circuit breaker is in the closing action, the corresponding moment when the closing speed reaches the maximum value is recorded as the closing moment. Finally, after obtaining the opening moment and the closing moment, the opening moment and the closing moment can be substituted into the velocity signal and the displacement stroke signal respectively, so that the velocity characteristic points and the displacement stroke signal characteristic points corresponding to the final opening moment and the closing moment can be obtained.

[0108] In this embodiment, after obtaining the acceleration monitoring signal, the speed signal and the displacement stroke signal corresponding to the acceleration monitoring signal can be further obtained, so that the corresponding travel characteristic points of the switch contacts can be obtained, thereby realizing the use of acceleration monitoring data to obtain the travel characteristic points of the switch contacts, and further improving the accuracy of obtaining the travel characteristic points of the switch contacts.

[0109] In one embodiment, Figure 4 As shown, step S104 may further include:

[0110] Step S401: According to the second electrical quantity monitoring data, a second target time interval for the energy storage motor to start working is determined from a plurality of time intervals divided according to preset time intervals.

[0111] The preset time interval may be a pre-set time interval for monitoring the operation of the energy storage motor, and the second target time interval refers to the time interval in which the energy storage motor operates. In this embodiment, the terminal may divide the time interval according to the pre-set time interval, and detect whether the energy storage motor operates. The detection method may be to obtain the sum of the second electrical quantity monitoring data for the energy storage motor in each time interval, and determine whether the sum of the second electrical quantity monitoring data is greater than or equal to a pre-set electrical quantity data threshold. If the sum of the corresponding second electrical quantity monitoring data in a certain time interval is greater than the above electrical quantity data threshold, the time interval is used as the second target time interval.

[0112] Step S402, obtaining the previous time interval of the second target time interval and the left endpoint time of the previous time interval, and obtaining the energy storage motor working interval based on the left endpoint time and the preset energy storage motor working time.

[0113] The previous time interval of the second target time interval refers to the time interval corresponding to the previous time interval of the second target time interval, the left endpoint time refers to the left endpoint time corresponding to the previous time interval, and the preset energy storage motor working time refers to the pre-designed signal collection duration for collecting the second electrical quantity signal. This duration is used to ensure that the electrical quantity signal of a complete energy storage motor working process can be collected once. The corresponding energy storage motor working interval can be obtained through the above-mentioned left endpoint time and the energy storage motor working time.

[0114] Step S403, acquiring second electrical quantity monitoring data collected within the working range of the energy storage motor to form a second electrical quantity monitoring signal, and acquiring pressure monitoring data collected within the working range of the energy storage motor to form a pressure monitoring signal.

[0115] The second electrical quantity monitoring signal refers to a monitoring signal formed by multiple second electrical quantity monitoring data, and the pressure monitoring signal refers to a monitoring signal formed by multiple pressure monitoring data. In this embodiment, since the second electrical quantity monitoring data and the pressure monitoring data are obtained from the signal sensor at a certain sampling frequency, the second electrical quantity monitoring data obtained in the working range of the energy storage motor can be multiple discrete second electrical quantity monitoring data. Similarly, the pressure monitoring data obtained can be multiple discrete pressure monitoring data. After obtaining the above-mentioned multiple discrete second electrical quantity monitoring data and pressure monitoring data, the above-mentioned multiple discrete second electrical quantity monitoring data and pressure monitoring data can be fitted to obtain the second electrical quantity monitoring signal and pressure monitoring signal, respectively.

[0116] Step S404, obtaining the second electrical quantity signal characteristic extreme value point corresponding to the second electrical quantity monitoring signal, the pressure signal characteristic extreme value point corresponding to the pressure monitoring signal, and the second electrical quantity monitoring data collected within the working range of the energy storage motor, to obtain the output power of the energy storage motor within the working range of the energy storage motor.

[0117] The characteristic extreme value point of the second electrical quantity signal refers to the extreme value point of the second electrical quantity monitoring signal obtained in step S403, which may be the maximum value point or the minimum value point of the signal curve corresponding to the second electrical quantity monitoring signal, and the characteristic extreme value point of the pressure signal refers to the extreme value point of the pressure monitoring signal, which may be the maximum value point or the minimum value point of the signal curve corresponding to the pressure monitoring signal. The output power refers to the output power of the energy storage motor within the working range of the energy storage motor, which may be obtained based on the energy storage motor current signal and the energy storage motor voltage signal contained in the second electrical quantity signal.

[0118] For example, the output power can be calculated as follows:

[0119]

[0120] Among them, U(i) represents the voltage signal of the energy storage motor, I(i) represents the current signal of the energy storage motor, N1 represents the sampling point corresponding to the time when the energy storage motor starts working, and N2 represents the sampling point corresponding to the time when the energy storage motor ends working.

[0121] Step S405, obtaining second temperature characteristic data corresponding to the second temperature monitoring data.

[0122] The second temperature monitoring data is the temperature monitoring data of the energy storage motor, and the temperature monitoring data can be collected according to a preset temperature monitoring data collection cycle, so there can be multiple second temperature monitoring data. The second temperature characteristic data refers to the characteristic data corresponding to each second temperature monitoring data, for example, it can include the second temperature monitoring data at the current moment, and the change amount of the second temperature monitoring data at the current moment.

[0123] Step S406, obtaining a first sub-energy storage motor state monitoring result for the energy storage motor according to the second electrical quantity signal characteristic extreme value point, the output power and a pre-designed electrical quantity signal evaluation model for the energy storage motor; obtaining a second sub-energy storage motor state monitoring result for the energy storage motor according to the pressure signal characteristic extreme value point and a pre-designed pressure value evaluation model for the opening and closing spring; obtaining a third sub-energy storage motor state monitoring result for the energy storage motor according to the second temperature characteristic data and a pre-designed temperature state evaluation model for the energy storage motor;

[0124] Step S407 , using the first sub-energy storage motor state monitoring result, the second sub-energy storage motor state monitoring result, and the third sub-energy storage motor state monitoring result as the energy storage motor state monitoring result.

[0125] Among them, the electrical quantity signal evaluation model is a model used to evaluate the electrical quantity state of the energy storage motor, the pressure value evaluation model is a model used to evaluate the pressure value state of the opening and closing springs of the energy storage motor, and the temperature state evaluation model refers to a model used to evaluate the temperature state of the energy storage motor. The first sub-energy storage motor state monitoring result is an evaluation result for the electrical quantity state of the energy storage motor, while the second sub-energy storage motor state monitoring result refers to an evaluation result for the pressure value state of the opening and closing springs of the energy storage motor, and the third sub-energy storage motor state monitoring result is an evaluation result for the temperature state of the energy storage motor.

[0126] Specifically, after obtaining the second electrical quantity signal characteristic extreme value point of the energy storage motor, the output power of the working state, the pressure signal characteristic extreme value point and the second temperature characteristic data in steps S404 and S405 respectively, the above characteristic data can be evaluated by corresponding evaluation models respectively to obtain the state monitoring results of each corresponding sub-energy storage motor, and the above sub-energy storage motor state monitoring results can also be used as the state monitoring results for the energy storage motor.

[0127] In this embodiment, when monitoring and evaluating the state of the energy storage motor, the electrical quantity state of the energy storage motor, the pressure state of the opening and closing springs, and the temperature state can be evaluated at the same time, thereby further improving the integrity of monitoring and evaluating the state of the energy storage motor.

[0128] In addition, the signal sensor may include: at least one of a voltage sensor, a current sensor, an acceleration sensor, a temperature sensor, a vibration sensor, and a pressure sensor; step S101 may further include: obtaining first electrical quantity monitoring data through a voltage sensor and a current sensor installed on the opening and closing coil; obtaining acceleration monitoring data through an acceleration sensor installed at the end of the pull rod of the moving contact of the target ring network cabinet circuit breaker; obtaining vibration monitoring data through a vibration sensor installed on the contact transmission mechanism of the moving contact; obtaining first temperature monitoring data through a temperature sensor installed on the axis of the transmission main shaft of the moving contact; obtaining second electrical quantity monitoring data through a voltage sensor and a current sensor installed on the energy storage motor; obtaining pressure monitoring data through a pressure sensor installed on the opening and closing spring of the energy storage motor; obtaining second temperature monitoring data through a temperature sensor installed on the energy storage motor.

[0129] In this embodiment, the types of signal sensors may include multiple types, for example, they may include at least one of a voltage sensor, a current sensor, an acceleration sensor, a temperature sensor, a vibration sensor, and a pressure sensor. Among them, the first electrical quantity monitoring data may be obtained by installing a voltage sensor and a current sensor on the opening and closing coil, the acceleration monitoring data may be obtained by installing an acceleration sensor at the end of the pull rod of the moving contact of the target ring network cabinet circuit breaker, the vibration monitoring data may be obtained by installing a vibration sensor on the contact transmission mechanism of the moving contact, the first temperature monitoring data may be obtained by installing a temperature sensor on the axis of the transmission main shaft of the moving contact, the second electrical quantity monitoring data may be obtained by installing a voltage sensor and a current sensor on the energy storage motor, the pressure monitoring data may be obtained by installing a pressure sensor on the opening and closing spring of the energy storage motor, and the second temperature monitoring data may be obtained by installing a temperature sensor on the energy storage motor. By installing different types of signal sensors at different positions of the target ring network cabinet circuit breaker, the accurate acquisition of monitoring data can be guaranteed, thereby providing a basis for the effective analysis of the circuit breaker status in all directions and multiple parameters.

[0130] This embodiment can ensure accurate acquisition of monitoring data by installing different types of signal sensors at different positions of the target ring main unit circuit breaker, thereby providing a basis for all-round multi-parameter effective analysis of the circuit breaker status.

[0131] In an application example, a system and method for online monitoring of mechanical characteristics of a ring main unit circuit breaker are also provided. Figure 5 As shown, the system includes three parts: the opening and closing coil state monitoring module, the switch moving contact stroke state monitoring module, and the energy storage motor state monitoring module. The opening and closing coil state monitoring module includes the opening coil voltage and current monitoring and the closing coil voltage and current monitoring functions; the switch moving contact stroke state monitoring module includes the opening and closing time monitoring, contact opening distance, overtravel monitoring, contact temperature monitoring, and contact abnormal vibration monitoring functions; the energy storage motor state monitoring module includes the energy storage motor temperature monitoring, energy storage motor voltage and current monitoring, closing spring pressure monitoring, and opening spring pressure monitoring functions. The above three types of monitoring modules collect overall data through the edge monitoring gateway.

[0132] Among them, the voltage and current monitoring function of the opening coil, the voltage and current monitoring function of the closing coil, and the voltage and current monitoring function of the energy storage motor are realized by voltage sensors and current sensors; the opening and closing time monitoring function, the contact opening distance, and the overtravel monitoring function are realized by acceleration sensors; the contact temperature monitoring function and the energy storage motor temperature monitoring are realized by temperature sensors; the abnormal vibration monitoring function of the contact is realized by vibration sensors; and the opening / closing spring pressure monitoring functions are all realized by pressure sensors.

[0133] This can be achieved through the following modules

[0134] 1. Opening and closing coil status monitoring module

[0135] In this module, the opening and closing coil status monitoring module realizes real-time monitoring of the electrical parameters of the opening and closing coils by installing Hall current sensors and electronic voltage sensors on the opening and closing coils. Figure 6 As shown:

[0136] (1) Assume that the sampling rate of the voltage and current signal data of the closing and opening coils is set to f Hz. The sampling rate f should be adjusted and optimized according to the actual situation. If it is set too high, it will be affected by hardware, computing power, etc., and if it is set too low, it will cause signal sampling distortion.

[0137] (2) According to the set parameters, starting from time t0, the voltage and current values ​​within the time period (t0, t0+5ms) are continuously collected and saved; the voltage and current values ​​within the time period (t0+5ms, t0+10ms) are continuously collected and saved.

[0138] (3) Sum the voltage and current values ​​within the time (t0+5ms, t0+10ms) to obtain ∑U and ∑I. Combined with the characteristics of the circuit breaker opening and closing time, the initial value Y is reasonably set based on actual measurement or experience. U , Y I .

[0139] (4) If ∑U≥Y U Or ∑I ≥ Y I , recorded as an effective opening and closing action, a state setting signal is issued, and the opening and closing voltage and current data of time T are continuously collected, together with the saved data in (2), to form a complete discrete signal within the time (t0, t0+10ms+T). At this time, the duration of a complete opening and closing current signal is usually between 40 and 120ms, and the T value can be set to be slightly larger than 120ms.

[0140] (5) If ∑U<Y U And ∑I<Y I It is inferred that no effective opening and closing action has occurred at this time, and the opening and closing voltage and current value data collected within (t0, t0+5ms) are discarded, and t0=t0+5ms is updated. Steps (2), (3), and (4) are repeated, that is, the condition judgment is entered again after collecting the latest data within 5ms.

[0141] (6) Taking the current value as an example, the complete discrete acquisition current value obtained in (4) is I(i), where i∈[t0,t0+(10ms+T)*f]. Let F(i)=I(i)-I(i-1)+K, where F(i) represents the acquisition signal slope function. Due to interference such as noise during the acquisition process, the local acquisition signal slope may be opposite to the actual signal slope, so the constant K is set for compensation.

[0142] Normalize the polarity of F(i). By setting the G(i) function, when F(i)>0, G(i)=1; when F(i)<0, G(i)=0. Analyze G(i). When G(i)=1, G(i+1)=0, I(i) may have a maximum value; when G(i)=0, G(i+1)=1, I(i) may have a minimum value. Combined with signal theory analysis, the characteristic value of the acquisition curve is obtained. The same is true for voltage.

[0143] (7) Based on the calculation results in (6), the electrical quantity signal evaluation model of the opening and closing coil under normal conditions is called to perform fault diagnosis. If correct, the data is saved and used as a training sample for the evaluation model later; if incorrect, an alarm signal is issued, the abnormal state log of the opening and closing coil is recorded, and manual confirmation is required to determine whether the evaluation model needs to be updated.

[0144] 2. Switch moving contact travel status monitoring module

[0145] The switch moving contact travel status monitoring module realizes functions such as opening and closing speed monitoring, contact opening distance, and overtravel monitoring by installing an acceleration sensor at the end of the circuit breaker moving contact pull rod. In addition, an electronic temperature sensor is attached to the axis of the contact and the transmission main shaft, and a vibration sensor is installed on the contact transmission mechanism to provide auxiliary decision-making basis such as temperature and abnormal vibration for the switch moving contact mechanism. The monitoring method is as follows, among which, the process of monitoring the switch moving contact travel status for acceleration or vibration is as follows Figure 7 As shown in the figure, the monitoring process of the moving contact stroke status of the temperature switch is as follows Figure 8 As shown:

[0146] (1) Initialize the acceleration sensor and vibration sensor to keep consistent with the parameters such as acquisition time t0, acquisition duration T, and sampling rate f in the closing and opening coil status monitoring module.

[0147] (2) Continuously collect and save the acceleration sensor data and vibration sensor data within 10ms. Data older than 10ms is discarded.

[0148] (3) If the state setting signal of step (4) is received from the closing and opening coil state monitoring module, the acceleration sensor data and the vibration sensor data within the T time are continuously collected, together with the data saved in the previous 10ms, and after signal conditioning, digital filtering and other operations, the acceleration discrete signal and vibration discrete signal within the complete closing and opening cycle are obtained.

[0149] (4) If the status setting signal is not received, repeat steps (2) and (3) to wait.

[0150] (5) The acceleration signal obtained in step (3) is set to a(i), the initial velocity and initial displacement of the system are both 0, and the velocity signal can be obtained by integrating the discrete Simpson method:

[0151]

[0152] Integrate again to get the displacement signal

[0153]

[0154] (6) Referring to the feature extraction method in step ⑥ of the closing and opening coil state monitoring module, the opening acceleration a 分 (i) Opening speed v 分 (i) Closing acceleration a 合 (i) Closing speed v 合 (i) The extreme value points on the discrete curve are calculated and judged. When the circuit breaker is in the opening action, at v 分 (i) Before the maximum value, the acceleration a 分 (i)) The time corresponding to the maximum value is recorded as the contact opening moment; when the circuit breaker is in the closing action, at v 合 (i) The moment when the maximum value is reached is recorded as the moment when the contacts just close.

[0155] (7) After determining the time points of just opening and just closing, substitute the formula in step (5) and calculate the circuit breaker closing speed, opening speed, contact opening distance, contact overtravel and other parameters according to the definition of the circuit breaker mechanical parameters. The contact opening distance is the displacement value of the contact from the steady state to the just closed position, and the contact overtravel is the displacement of the contact from the just closed position to the closed steady state.

[0156] (8) Similarly, referring to the feature extraction method of step (6) in the closing and opening coil status monitoring module, the vibration sensor signal is collected and the vibration signal waveform is sorted out after conditioning, and the vibration characteristic extreme value point is calculated.

[0157] (9) Contact temperature monitoring in an independent fixed period T aThe temperature sensor data TEMPA(i) is collected internally and compared with the temperature data at the previous moment to calculate ΔTEMPA(i)=TEMPA(i)-TEMPA(i-1).

[0158] (10) Call the normal opening and closing moving contact state evaluation model, and combine it with the calculation results of (7) to perform contact state fault diagnosis; call the opening and closing vibration signal evaluation model, and combine it with the calculation results of the opening and closing vibration discrete waveform and extreme point in (8) to perform fault diagnosis; call the opening and closing moving contact temperature state evaluation model, and combine it with the current temperature value and temperature change value in (9) to perform fault diagnosis. If it is correct, save its data as a training sample for the evaluation model; if it is incorrect, record the abnormal travel log of the switch moving contact and wait for manual confirmation whether the evaluation model needs to be updated.

[0159] 3. Energy storage motor status monitoring module

[0160] The energy storage motor status monitoring module mainly installs electronic voltage sensors and Hall current sensors on the energy storage motor to monitor the electrical parameter characteristics of the energy storage motor; by installing pressure sensors on the opening and closing springs, the energy storage spring and energy storage motor status characteristics are monitored; electronic temperature sensors are placed on the energy storage motor to monitor the real-time temperature of the energy storage motor. The monitoring method is as follows, among which the process of monitoring the electrical quantity of the energy storage motor and the pressure of the opening and closing springs is as follows: Fig. 9 As shown in the figure, the temperature monitoring process of the energy storage motor is as follows Fig.10 As shown:

[0161] (1) Initialize the voltage sensor, current sensor, and pressure sensor of the energy storage motor to keep consistent with the parameters such as the acquisition time t0, acquisition duration T, and sampling rate f in the opening and closing coil status monitoring module.

[0162] (2) Refer to the state monitoring method of steps (2), (3), (4), and (5) in the closing and opening coil state monitoring module to determine the time when the energy storage motor starts working and collect 10ms+T 储 The voltage and current value signal within the time. Where T 储 The value is adjusted according to the circuit breaker energy storage motor characteristics.

[0163] (3) Referring to the feature extraction method of step (6) in the closing and opening coil state monitoring module, the waveform curve of the actual working range of the energy storage motor and the extreme feature points of the range are calculated, and the effective output power of the energy storage motor in this range is calculated:

[0164]

[0165] Where N1 represents the sampling point corresponding to the start time of the energy storage motor, and N2 represents the sampling point corresponding to the end time of the energy storage motor.

[0166] (4) Record the pressure sensing data of the opening and closing spring in the working range of the energy storage motor, refer to the feature extraction method of step (6) in the opening and closing coil state monitoring module, and analyze and calculate the pressure extreme value P max and P min .

[0167] (5) Energy storage motor temperature monitoring collects temperature sensor data TEMPB(i) within a fixed period and compares it with the temperature data at the previous moment to calculate ΔTEMPB(i)=TEMPB(i)-TEMPB(i-1).

[0168] (6) Call the energy storage motor electrical quantity signal evaluation model, and compare the energy storage motor working waveform characteristic points and normal output power range in combination with the calculation results of (3); call the opening and closing spring pressure value evaluation model, and perform fault diagnosis in combination with the pressure curve and extreme point in (4), and compare whether the extreme point exceeds the given range; call the energy storage motor temperature state evaluation model, and perform fault diagnosis in combination with the current temperature value and temperature change value in (5), and determine whether the temperature value upper limit and temperature change value upper limit are exceeded. If correct, save the data as a training sample for the evaluation model; if incorrect, record the energy storage motor state error log and wait for manual confirmation whether the evaluation model needs to be updated.

[0169] In the above application examples, the monitoring parameters of the mechanical characteristics of the circuit breaker are fully covered, and real-time monitoring and analysis are performed from three aspects: the state of the opening and closing coils, the state of the moving contacts, and the state of the energy storage motor. The internal space of the ring main unit is compact, and this system uses micro-intelligent sensors that can be fully integrated with the various components of the circuit breaker without affecting the structural characteristics of the circuit breaker. In the actual monitoring process, the normal monitoring results are saved to the database, and can be used as evaluation model samples to continuously optimize the evaluation model later.

[0170] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0171] Based on the same inventive concept, the embodiment of the present application also provides a ring main unit circuit breaker state monitoring device for implementing the ring main unit circuit breaker state monitoring method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the ring main unit circuit breaker state monitoring device provided below can refer to the limitations of the ring main unit circuit breaker state monitoring method above, and will not be repeated here.

[0172] In one embodiment, Fig.11 As shown, a ring main unit circuit breaker state monitoring device is provided, comprising: a monitoring data acquisition module 1101, a closing and opening coil monitoring module 1102, a switch contact monitoring module 1103, an energy storage motor monitoring module 1104 and a circuit breaker state monitoring module 1105, wherein:

[0173] The monitoring data acquisition module 1101 is used to acquire multiple monitoring data for the target ring main unit circuit breaker through multiple signal sensors installed on the target ring main unit circuit breaker;

[0174] The opening and closing coil monitoring module 1102 is used to obtain the first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from the multiple monitoring data through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data;

[0175] The switch contact monitoring module 1103 is used to obtain, from a plurality of monitoring data, acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, vibration monitoring data of the switch contact, and first temperature monitoring data of the switch contact through the switch contact travel state monitoring module, and obtain the switch contact travel state monitoring result of the target ring main unit circuit breaker according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data;

[0176] The energy storage motor monitoring module 1104 is used to obtain, from multiple monitoring data, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during the operation of the energy storage motor, and second temperature monitoring data of the energy storage motor through the energy storage motor state monitoring module, and obtain the energy storage motor state monitoring result for the target ring main unit circuit breaker according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data;

[0177] The circuit breaker state monitoring module 1105 is used to use the state monitoring results of the opening and closing coils, the state monitoring results of the switch contact stroke, and the state monitoring results of the energy storage motor as the state monitoring results for the target ring main unit circuit breaker.

[0178] In one embodiment, the opening and closing coil monitoring module 1102 is further used to determine, based on the first electrical quantity monitoring data, a first target time interval for the opening and closing coil to perform an opening and closing action from multiple time intervals divided according to preset time intervals; obtain the previous time interval of the first target time interval, and the left endpoint time of the previous time interval, and obtain the first electrical quantity signal acquisition interval based on the left endpoint time and the preset first electrical quantity signal acquisition time; obtain the first electrical quantity monitoring data collected in the first electrical quantity signal acquisition interval to form a first electrical quantity monitoring signal; obtain the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, and obtain the opening and closing coil status monitoring result according to the first electrical quantity signal characteristic extreme value point and a pre-designed electrical quantity signal evaluation model for the opening and closing coil.

[0179] In one embodiment, the opening and closing coil monitoring module 1102 is further used to obtain the current time interval and the first electrical quantity monitoring data collected in the current time interval; sum the first electrical quantity monitoring data collected in the current time interval to obtain the sum of the first electrical quantity monitoring data corresponding to the current time interval; if the sum of the first electrical quantity monitoring data is greater than or equal to the preset electrical quantity threshold, the current time interval is used as the first target time interval; and to determine each first electrical quantity monitoring data and the previous first electrical quantity monitoring data of each first electrical quantity monitoring data; obtain a preset noise compensation constant; obtain the slope information corresponding to the first electrical quantity monitoring signal according to each first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each first electrical quantity monitoring data, and the noise compensation constant; obtain the characteristic extreme value point of the first electrical quantity signal based on the slope information.

[0180] In one embodiment, the switch contact monitoring module 1103 is further used to determine a first target time interval for the opening and closing action of the opening and closing coil from a plurality of time intervals divided according to preset time intervals, and based on the first target time interval, obtain an acceleration signal acquisition interval and a vibration signal acquisition interval corresponding to the target time interval; obtain acceleration monitoring data collected in the acceleration signal acquisition interval to form an acceleration monitoring signal, and obtain vibration monitoring data collected in the vibration signal acquisition interval to form a vibration monitoring signal; based on the acceleration monitoring signal, obtain the travel characteristic points of the switch contact, and based on the vibration monitoring signal, obtain the vibration monitoring signal characteristic extreme value points corresponding to the vibration monitoring signal. ; Obtain the first temperature characteristic data corresponding to the first temperature monitoring data; obtain the first sub-stroke state monitoring result for the switch contact according to the stroke characteristic point and the pre-designed stroke state evaluation model for the switch contact; obtain the second sub-stroke state monitoring result for the switch contact according to the characteristic extreme point of the vibration monitoring signal and the pre-designed vibration state evaluation model for the switch contact; obtain the third sub-stroke state monitoring result for the switch contact according to the first temperature characteristic data and the pre-designed temperature state evaluation model for the switch contact; use the first sub-stroke state monitoring result, the second sub-stroke state monitoring result, and the third sub-stroke state monitoring result as the switch contact stroke state monitoring result.

[0181] In one embodiment, the switch contact monitoring module 1103 is further used to obtain a speed signal and a displacement stroke signal that match the acceleration monitoring signal based on the acceleration monitoring signal; determine the opening and closing times of the switch contacts according to the acceleration monitoring signal and the speed signal; use the speed signal and the displacement stroke signal to obtain the speed characteristic points and the displacement stroke signal characteristic points corresponding to the opening and closing times, respectively, and use the speed characteristic points and the displacement stroke signal characteristic points as the travel characteristic points of the switch contacts.

[0182] In one embodiment, the energy storage motor monitoring module 1104 is further used to determine, based on the second electrical quantity monitoring data, a second target time interval for the energy storage motor to start working from a plurality of time intervals divided according to a preset time interval; obtain the previous time interval of the second target time interval, and the left endpoint time of the previous time interval, and obtain the energy storage motor working interval based on the left endpoint time and the preset energy storage motor working time; obtain the second electrical quantity monitoring data collected within the working interval of the energy storage motor to form a second electrical quantity monitoring signal, and obtain the pressure monitoring data collected within the working interval of the energy storage motor to form a pressure monitoring signal; obtain the second electrical quantity signal characteristic extreme value point corresponding to the second electrical quantity monitoring signal, the pressure signal characteristic extreme value point corresponding to the pressure monitoring signal, and obtain the second electrical quantity monitoring data collected within the working interval of the energy storage motor. data, and obtain the output power of the energy storage motor within the working range of the energy storage motor; obtain the second temperature characteristic data corresponding to the second temperature monitoring data; obtain the first sub-energy storage motor state monitoring result for the energy storage motor according to the second electrical quantity signal characteristic extreme value point, the output power and the pre-designed electrical quantity signal evaluation model for the energy storage motor; obtain the second sub-energy storage motor state monitoring result for the energy storage motor according to the pressure signal characteristic extreme value point and the pre-designed pressure value evaluation model for the opening and closing spring; obtain the third sub-energy storage motor state monitoring result for the energy storage motor according to the second temperature characteristic data and the pre-designed temperature state evaluation model for the energy storage motor; and use the first sub-energy storage motor state monitoring result, the second sub-energy storage motor state monitoring result, and the third sub-energy storage motor state monitoring result as the energy storage motor state monitoring result.

[0183] In one embodiment, the signal sensor includes: at least one of a voltage sensor, a current sensor, an acceleration sensor, a temperature sensor, a vibration sensor, and a pressure sensor; the monitoring data acquisition module 1101 is further used to obtain first electrical quantity monitoring data through a voltage sensor and a current sensor installed on the opening and closing coil; obtain acceleration monitoring data through an acceleration sensor installed at the end of the pull rod of the moving contact of the target ring network cabinet circuit breaker; obtain vibration monitoring data through a vibration sensor installed on the contact transmission mechanism of the moving contact; obtain first temperature monitoring data through a temperature sensor installed on the axis of the transmission main shaft of the moving contact; obtain second electrical quantity monitoring data through a voltage sensor and a current sensor installed on the energy storage motor; obtain pressure monitoring data through a pressure sensor installed on the opening and closing spring of the energy storage motor; obtain second temperature monitoring data through a temperature sensor installed on the energy storage motor.

[0184] Each module in the above-mentioned ring main unit circuit breaker status monitoring device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0185] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.12 As shown. The computer device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a method for monitoring the status of a ring network cabinet circuit breaker is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0186] Those skilled in the art will understand that Fig.12 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0187] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0188] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0189] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0190] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0191] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0192] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0193] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A ring main unit circuit breaker status monitoring method, characterized in that: The method comprises: Acquire multiple monitoring data for the target ring main unit circuit breaker by installing multiple signal sensors on the target ring main unit circuit breaker; Obtain the first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from the multiple monitoring data through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data; including: determining the first target time interval for the opening and closing action of the opening and closing coil from multiple time intervals divided according to preset time intervals according to the first electrical quantity monitoring data; obtaining the previous time interval of the first target time interval and the left endpoint time of the previous time interval, and obtaining the first electrical quantity signal acquisition interval based on the left endpoint time and the preset first electrical quantity signal acquisition time; obtaining the first electrical quantity monitoring data collected in the first electrical quantity signal acquisition interval to form a first electrical quantity monitoring signal; obtaining the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, and obtaining the opening and closing coil state monitoring result according to the first electrical quantity signal characteristic extreme value point and the pre-designed electrical quantity signal evaluation model for the opening and closing coil; By means of a switch contact stroke state monitoring module, the acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, the vibration monitoring data of the switch contact, and the first temperature monitoring data of the switch contact are acquired from the plurality of monitoring data, and the switch contact stroke state monitoring result of the target ring main unit circuit breaker is acquired according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data; By means of the energy storage motor state monitoring module, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor are obtained from the plurality of monitoring data, and a state monitoring result of the energy storage motor of the target ring main unit circuit breaker is obtained according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data; The state monitoring result of the opening and closing coil, the state monitoring result of the switch contact stroke, and the state monitoring result of the energy storage motor are used as the state monitoring result for the target ring main unit circuit breaker.

2. The method according to claim 1, characterized in that The determining, based on the first electrical quantity monitoring data, a first target time interval for the opening and closing coil to perform an opening and closing action from a plurality of time intervals divided according to preset time intervals, comprises: Acquire a current time interval and first electrical quantity monitoring data collected within the current time interval; The first electrical quantity monitoring data collected in the current time interval is summed to obtain the sum of the first electrical quantity monitoring data corresponding to the current time interval; If the sum of the first electrical quantity monitoring data is greater than or equal to a preset electrical quantity threshold, the current time interval is used as the first target time interval; The step of obtaining a first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal includes: Determine each first electrical quantity monitoring data and the previous first electrical quantity monitoring data of each first electrical quantity monitoring data; Get the preset noise compensation constant; Obtaining slope information corresponding to the first electrical quantity monitoring signal according to each of the first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each of the first electrical quantity monitoring data, and the noise compensation constant; The characteristic extreme value point of the first electrical quantity signal is obtained based on the slope information.

3. The method according to claim 1, characterized in that The step of obtaining a switch contact stroke state monitoring result for the target ring main unit circuit breaker according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data includes: Determine a first target time interval for the opening and closing coil to perform opening and closing actions from a plurality of time intervals divided according to preset time intervals, and based on the first target time interval, obtain an acceleration signal collection interval and a vibration signal collection interval that are compatible with the target time interval; Acquire the acceleration monitoring data collected in the acceleration signal collection interval to form an acceleration monitoring signal, and acquire the vibration monitoring data collected in the vibration signal collection interval to form a vibration monitoring signal; Based on the acceleration monitoring signal, obtaining the travel characteristic point of the switch contact, and based on the vibration monitoring signal, obtaining the vibration monitoring signal characteristic extreme value point corresponding to the vibration monitoring signal; Acquire first temperature characteristic data corresponding to the first temperature monitoring data; According to the stroke characteristic points and the pre-designed stroke state evaluation model for the switch contact, a first sub-stroke state monitoring result for the switch contact is obtained; according to the characteristic extreme value points of the vibration monitoring signal and the pre-designed vibration state evaluation model for the switch contact, a second sub-stroke state monitoring result for the switch contact is obtained; according to the first temperature characteristic data and the pre-designed temperature state evaluation model for the switch contact, a third sub-stroke state monitoring result for the switch contact is obtained; The first sub-stroke state monitoring result, the second sub-stroke state monitoring result, and the third sub-stroke state monitoring result are used as the switch contact stroke state monitoring result.

4. The method according to claim 3, characterized in that The step of obtaining the travel characteristic point of the switch contact based on the acceleration monitoring signal comprises: Based on the acceleration monitoring signal, obtaining a speed signal and a displacement stroke signal matching the acceleration monitoring signal; Determining the opening and closing moments of the switch contacts according to the acceleration monitoring signal and the speed signal; The speed signal and the displacement stroke signal are used to obtain the speed characteristic points and the displacement stroke signal characteristic points corresponding to the opening moment and the closing moment respectively, and the speed characteristic points and the displacement stroke signal characteristic points are used as the stroke characteristic points of the switch contact.

5. The method according to claim 1, characterized in that The step of obtaining the energy storage motor status monitoring result for the target ring main unit circuit breaker according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data includes: According to the second electrical quantity monitoring data, determining a second target time interval for the energy storage motor to start working from a plurality of time intervals divided according to preset time intervals; Obtaining a previous time interval of the second target time interval and a left endpoint time of the previous time interval, and obtaining an energy storage motor working interval based on the left endpoint time and a preset energy storage motor working time; Acquire second electrical quantity monitoring data collected within the working interval of the energy storage motor to form a second electrical quantity monitoring signal, and acquire pressure monitoring data collected within the working interval of the energy storage motor to form a pressure monitoring signal; Obtaining a second electrical quantity signal characteristic extreme value point corresponding to the second electrical quantity monitoring signal, a pressure signal characteristic extreme value point corresponding to the pressure monitoring signal, and the output power of the energy storage motor in the energy storage motor working range according to the second electrical quantity monitoring data collected in the energy storage motor working range; Acquire second temperature characteristic data corresponding to the second temperature monitoring data; According to the characteristic extreme value point of the second electrical quantity signal, the output power and the pre-designed electrical quantity signal evaluation model for the energy storage motor, a first sub-energy storage motor state monitoring result for the energy storage motor is obtained; according to the characteristic extreme value point of the pressure signal and the pre-designed pressure value evaluation model for the opening and closing spring, a second sub-energy storage motor state monitoring result for the energy storage motor is obtained; according to the second temperature characteristic data and the pre-designed temperature state evaluation model for the energy storage motor, a third sub-energy storage motor state monitoring result for the energy storage motor is obtained; The first sub-energy storage motor state monitoring result, the second sub-energy storage motor state monitoring result, and the third sub-energy storage motor state monitoring result are used as the energy storage motor state monitoring result.

6. The method according to any one of claims 1 to 5, characterized in that: The signal sensor comprises: at least one of a voltage sensor, a current sensor, an acceleration sensor, a temperature sensor, a vibration sensor, and a pressure sensor; The method of obtaining a plurality of monitoring data for the target ring main unit circuit breaker by installing a plurality of signal sensors on the target ring main unit circuit breaker includes: Acquiring the first electrical quantity monitoring data through a voltage sensor and a current sensor installed on the opening and closing coil; Acquiring the acceleration monitoring data through an acceleration sensor installed at the end of a pull rod of a moving contact of the target ring main unit circuit breaker; Acquiring the vibration monitoring data through a vibration sensor installed on a contact transmission mechanism of the moving contact; Acquiring the first temperature monitoring data through a temperature sensor installed on the axis of the transmission main shaft of the moving contact; Acquiring the second electrical quantity monitoring data by means of a voltage sensor and a current sensor installed on the energy storage motor; The pressure monitoring data is obtained by means of a pressure sensor installed on the opening and closing spring of the energy storage motor; The second temperature monitoring data is obtained by a temperature sensor installed on the energy storage motor.

7. A ring main unit circuit breaker status monitoring device, characterized in that: The device comprises: A monitoring data acquisition module, used to acquire a plurality of monitoring data for the target ring main unit circuit breaker through a plurality of signal sensors installed on the target ring main unit circuit breaker; The opening and closing coil monitoring module is used to obtain the first electrical quantity monitoring data of the opening and closing coil of the target ring main unit circuit breaker from the multiple monitoring data through the opening and closing coil state monitoring module, and obtain the opening and closing coil state monitoring result of the target ring main unit circuit breaker according to the first electrical quantity monitoring data; further used to determine the first target time interval for the opening and closing action of the opening and closing coil from multiple time intervals divided according to preset time intervals according to the first electrical quantity monitoring data; obtain the previous time interval of the first target time interval and the left endpoint time of the previous time interval, and obtain the first electrical quantity signal acquisition interval based on the left endpoint time and the preset first electrical quantity signal acquisition time; obtain the first electrical quantity monitoring data collected in the first electrical quantity signal acquisition interval to form a first electrical quantity monitoring signal; obtain the first electrical quantity signal characteristic extreme value point corresponding to the first electrical quantity monitoring signal, and obtain the opening and closing coil state monitoring result according to the first electrical quantity signal characteristic extreme value point and the pre-designed electrical quantity signal evaluation model for the opening and closing coil; A switch contact monitoring module, configured to obtain, from the plurality of monitoring data, acceleration monitoring data of the switch contact of the target ring main unit circuit breaker, vibration monitoring data of the switch contact, and first temperature monitoring data of the switch contact through the switch contact travel state monitoring module, and obtain a switch contact travel state monitoring result for the target ring main unit circuit breaker according to the acceleration monitoring data, the vibration monitoring data, and the first temperature monitoring data; An energy storage motor monitoring module is used to obtain, from the plurality of monitoring data, second electrical quantity monitoring data of the energy storage motor of the target ring main unit circuit breaker, pressure monitoring data of the opening and closing spring during operation of the energy storage motor, and second temperature monitoring data of the energy storage motor through the energy storage motor state monitoring module, and obtain a state monitoring result of the energy storage motor of the target ring main unit circuit breaker according to the second electrical quantity monitoring data, the pressure monitoring data, and the second temperature monitoring data; The circuit breaker status monitoring module is used to use the state monitoring results of the opening and closing coils, the state monitoring results of the switch contact stroke, and the state monitoring results of the energy storage motor as the state monitoring results for the target ring main unit circuit breaker.

8. The device according to claim 7, characterized in that The opening and closing coil monitoring module is further used to obtain the current time interval and the first electrical quantity monitoring data collected in the current time interval; sum the first electrical quantity monitoring data collected in the current time interval to obtain the sum of the first electrical quantity monitoring data corresponding to the current time interval; if the sum of the first electrical quantity monitoring data is greater than or equal to a preset electrical quantity threshold, the current time interval is used as the first target time interval; Determine each first electrical quantity monitoring data and the previous first electrical quantity monitoring data of each first electrical quantity monitoring data; obtain a preset noise compensation constant; obtain slope information corresponding to the first electrical quantity monitoring signal based on each first electrical quantity monitoring data, the previous first electrical quantity monitoring data of each first electrical quantity monitoring data, and the noise compensation constant; obtain the characteristic extreme value point of the first electrical quantity signal based on the slope information.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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