CN112782574A - Operation monitoring system and method of circuit breaker - Google Patents
Operation monitoring system and method of circuit breaker Download PDFInfo
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Abstract
The application relates to an operation monitoring system and method of a circuit breaker. The operation monitoring system of the circuit breaker includes: the monitoring sensor comprises a switching value sensor and a plurality of types of state monitoring sensors, the switching value sensor is used for being connected with the circuit breaker to be monitored so as to monitor the switching state of the circuit breaker to obtain a switching value signal, and the state monitoring sensors are respectively used for being connected with the circuit breaker so as to monitor the running state of the circuit breaker to obtain a plurality of state monitoring signals; the input end of the signal acquisition device is connected with the output end of the monitoring sensor, and the signal acquisition device is used for acquiring a switching value signal and a plurality of state monitoring signals; the input end of the processing device is connected with the output end of the signal acquisition device, and the processing device is used for determining whether the operating state of the circuit breaker is normal or not based on the switching value signals and the plurality of state monitoring signals acquired by the signal acquisition device. The operation monitoring system of the circuit breaker can find the fault of the circuit breaker in time.
Description
Technical Field
The application relates to the technical field of circuit breakers, in particular to an operation monitoring system and method of a circuit breaker.
Background
The circuit breaker is a main product in power equipment, and not only has a large number and variety, but also bears important responsibilities such as controlling circuit line to be turned off and cutting off a fault line, and therefore the operating state of the circuit breaker needs to be detected.
At present, a common detection mode generally performs a power failure test on a circuit breaker according to a time period, and detects the operation state of the circuit breaker during the power failure test, so as to determine whether the circuit breaker is normal.
However, each detection needs to be performed only by performing a power failure test on the circuit breaker, so that the circuit breaker cannot be found in time when a fault occurs.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a circuit breaker operation monitoring system and method capable of timely finding a fault of a circuit breaker.
An operation monitoring system of a circuit breaker, comprising:
the monitoring sensor comprises a switching value sensor and a plurality of types of state monitoring sensors, the switching value sensor is used for being connected with a circuit breaker to be monitored so as to monitor the switching state of the circuit breaker to obtain a switching value signal, and the state monitoring sensors are respectively used for being connected with the circuit breaker so as to monitor the running state of the circuit breaker to obtain a plurality of state monitoring signals;
the input end of the signal acquisition device is connected with the output end of the monitoring sensor, and the signal acquisition device is used for acquiring the switching value signal and a plurality of state monitoring signals;
the input end of the processing device is connected with the output end of the signal acquisition device, and the processing device is used for determining whether the running state of the circuit breaker is normal or not based on the switching value signals acquired by the signal acquisition device and the plurality of state monitoring signals.
In one embodiment, the plurality of types of condition monitoring sensors includes at least two of a current sensor, a displacement sensor, a vibration sensor, and a temperature sensor.
In one embodiment, the signal acquisition device comprises:
the input end of the analog-to-digital conversion module is respectively connected with the output ends of the switching value sensor and the state monitoring sensor, and the analog-to-digital conversion module is used for converting the switching value signal and the state monitoring signal from an analog signal to a digital signal to obtain a digital monitoring signal;
the input end of the microprocessor is connected with the output end of the analog-to-digital conversion module, the output end of the microprocessor is connected with the processing device, and the microprocessor is used for receiving the digital monitoring signal and sending the digital monitoring signal to the processing device.
In one embodiment, the signal acquisition device further comprises:
the input end of the programmable gate array is connected with the output end of the analog-to-digital conversion module, the output end of the programmable gate array is connected with the input end of the microprocessor, and the programmable gate array is used for controlling the analog-to-digital conversion module to perform signal conversion, receiving the digital monitoring signals sent by the analog-to-digital conversion module, and sending the received digital monitoring signals to the microprocessor after being packaged.
In one embodiment, the analog-to-digital conversion module includes:
the analog-to-digital converter is used for converting an analog signal into a digital signal and is provided with a control register, a state register, a channel selection register and a result register;
the control register is used for controlling the analog-to-digital converter to start conversion or stop conversion;
the state register is used for controlling a conversion mode of the analog-to-digital converter for signal conversion;
the channel selection register is used for controlling the analog-to-digital converter to receive at least one analog signal sent by the monitoring sensor;
the result register is used for storing the conversion result of the digital-to-analog converter conversion signal.
In one embodiment, the microprocessor is further connected with at least one of the monitoring sensors, and the microprocessor is further configured to receive a driving signal sent by the processing device and drive at least one of the monitoring sensors to operate based on the driving signal.
In one embodiment, the signal acquisition device further comprises:
the monitoring module is connected with the microprocessor and used for regularly checking the internal condition of the microprocessor and sending a restarting signal to the microprocessor when the microprocessor has an error, and the restarting signal is used for indicating the microprocessor to restart.
In one embodiment, the method further comprises the following steps:
and the human-computer interaction device is connected with the processing device and is used for providing a monitoring picture of the circuit breaker and providing an operation interface for a user.
In one embodiment, the method further comprises the following steps:
the input end of the signal preprocessing device is connected with the output end of the monitoring sensor, the output end of the signal preprocessing device is connected with the analog-to-digital conversion module, and the signal preprocessing device is used for filtering out non-periodic components and higher harmonics of at least one of the switching value signals and the state monitoring signals and converting the filtered signals into signal intervals matched with the analog-to-digital conversion module.
An operation monitoring method of a circuit breaker, comprising:
the method comprises the steps that a switching value signal and a plurality of state monitoring signals acquired by a signal acquisition device are acquired, the switching value signal is obtained by monitoring the switching state of a circuit breaker through a switching value sensor, the switching value sensor is connected with the circuit breaker to be monitored, the state monitoring signals are obtained by monitoring the running state of the circuit breaker through various types of state monitoring sensors, and the state monitoring sensors are respectively connected with the circuit breaker;
and determining whether the operation state of the circuit breaker is normal or not based on the switching value signal and the plurality of state monitoring signals.
According to the operation monitoring system and method of the circuit breaker, the monitoring sensor is used for acquiring the switching value signal and the plurality of state monitoring signals of the circuit breaker, and the switching value signal and the plurality of state monitoring signals are acquired by the signal acquisition device and then sent to the processing device, the processing device determines whether the operation state of the circuit breaker is normal or not based on the switching value signal and the plurality of state monitoring signals, and the operation state of the circuit breaker can be monitored in real time through the monitoring sensor, so that the problem that the circuit breaker cannot be found in time when a fault occurs due to the fact that a power failure test needs to be carried out on the circuit breaker in each detection is avoided, and the fault of the circuit breaker can be found in.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an operation monitoring system of a circuit breaker according to an embodiment;
fig. 2 is a schematic structural diagram of an operation monitoring system of another circuit breaker according to an embodiment;
fig. 3 is a schematic structural diagram of an analog-to-digital conversion module according to an embodiment;
fig. 4 is a schematic structural diagram of an operation monitoring system of another circuit breaker according to an embodiment;
fig. 5 is a schematic flowchart of an operation monitoring method of a circuit breaker according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
The invention provides an operation monitoring system and method of a circuit breaker, and a fault of the circuit breaker can be discovered in time.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an operation monitoring system of a circuit breaker according to an embodiment. In one embodiment, as shown in fig. 1, there is provided an operation monitoring system of a circuit breaker, including a monitoring sensor 110, a signal acquisition device 120 and a processing device 130, wherein:
the monitoring sensor 110 comprises a switching value sensor 111 and a plurality of types of state monitoring sensors 112, the switching value sensor 111 is used for being connected with the circuit breaker 200 to be monitored so as to monitor the switching state of the circuit breaker 200 to obtain a switching value signal, and the state monitoring sensors 112 are respectively used for being connected with the circuit breaker 200 so as to monitor the running state of the circuit breaker 200 to obtain a plurality of state monitoring signals. The input end of the signal acquisition device 120 is connected to the output end of the monitoring sensor 110, and the signal acquisition device 120 is configured to acquire the switching value signal and the plurality of state monitoring signals. The input end of the processing device 130 is connected to the output end of the signal collecting device 120, and the processing device 130 is configured to determine whether the operating state of the circuit breaker 200 is normal based on the switching value signal and the plurality of state monitoring signals collected by the signal collecting device 120.
The signal from the switching value sensor 111 is a contact signal, and has two states of open and closed. In the present embodiment, the switching value sensor 111 is used for monitoring whether the circuit breaker 200 is in the open state or the closed state, so as to obtain a switching value signal, and the switching value signal can be understood as a signal representing the open/closed state of the circuit breaker 200. Specifically, when the circuit breaker 200 is in the closed state, the power operates normally; when the circuit breaker 200 is in the open state, the power stops operating. In the present embodiment, the status monitoring sensors 112 are of a variety of types, with each type of status monitoring sensor 112 being used to monitor a different operating status of the circuit breaker 200. The plurality of condition monitoring signals are signals obtained by monitoring different operating conditions of the circuit breaker 200 by a plurality of types of condition monitoring sensors 112. Specifically, each type of condition monitoring sensor 112 monitors an operating condition of the circuit breaker 200 for a condition monitoring signal.
Specifically, the switching value sensor 111 monitors the open/close state of the circuit breaker 200 in real time to obtain a switching value signal. Meanwhile, the various types of condition monitoring sensors 112 monitor the operating condition of the circuit breaker 200, resulting in a plurality of condition monitoring signals. The signal collecting device 120 collects the switching value signal and the state monitoring signal from the switching value sensor 111 and the state monitoring sensor 112, and transmits the signals to the processing device 130, and the processing device 130 may determine whether the operation state of the circuit breaker 200 is normal based on the switching value signal and the state monitoring signals collected by the signal collecting device 120.
In this embodiment, the monitoring sensor 110 is used to collect the switching value signal and the plurality of state monitoring signals of the circuit breaker 200, and the switching value signal and the plurality of state monitoring signals are collected by the signal collecting device 120 and then sent to the processing device 130, the processing device 130 determines whether the operating state of the circuit breaker 200 is normal or not based on the switching value signal and the plurality of state monitoring signals, and since the operating state of the circuit breaker 200 can be monitored in real time by the monitoring sensor 110, the problem that the circuit breaker 200 cannot be found in time when a fault occurs due to the fact that a power failure test needs to be performed on the circuit breaker 200 during each detection is avoided, and the fault of the circuit breaker 200 can be found in time. The running state of the circuit breaker 200 is monitored in real time, so that the fault of the circuit breaker 200 can be found in time, and a reasonable maintenance plan is arranged. The untimely and blindness brought by periodic inspection can be fully avoided, the working efficiency of maintainers is improved, and the method has important significance for improving the reliability and safety of the power system.
It should be noted that, in the present embodiment, how the processing device 130 determines whether the operating state of the circuit breaker 200 is normal or not by using the switching value signal and the plurality of state monitoring signals is not particularly limited.
Optionally, the monitoring sensors 110 of the present embodiment may be one or more groups, which is not limited herein. Specifically, each set of monitoring sensors 110 is used to monitor one circuit breaker 200. When a plurality of circuit breakers 200 need to be monitored simultaneously, each circuit breaker 200 is configured with one set of monitoring sensor 110, and then the plurality of circuit breakers 200 can be monitored respectively through the plurality of sets of monitoring sensors 110.
In one embodiment, optionally, the plurality of types of condition monitoring sensors 112 include, but are not limited to, at least two of a current sensor, a displacement sensor, a vibration sensor, and a temperature sensor.
Wherein the current sensor is used to monitor the current level of the coil within the circuit breaker 200. The displacement sensor is used to monitor the amount of displacement of components in the circuit breaker 200, such as the amount of displacement of contacts within the circuit breaker 200. The vibration sensor is used to monitor the vibration of the circuit breaker 200, such as whether the circuit breaker 200 generates vibration, the assigned magnitude of the vibration, the duration of the vibration, and the like. The temperature sensor is used to monitor the temperature of the circuit breaker 200.
It will be appreciated that when the condition monitoring sensor 112 comprises a current sensor, the condition monitoring signal comprises a coil current signal. When the condition monitoring sensor 112 includes a displacement sensor, the condition monitoring signal includes a displacement amount signal. When the condition monitoring sensor 112 comprises a vibration sensor, the condition monitoring sensor 112 comprises a vibration signal. When the condition monitoring sensor 112 comprises a temperature sensor, the condition monitoring signal comprises a temperature signal.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another circuit breaker operation monitoring system according to an embodiment. In one embodiment, as shown in fig. 2, the signal acquisition device 120 includes an analog-to-digital conversion module 121 and a microprocessor 122. Wherein:
the input end of the analog-to-digital conversion module 121 is connected to the output ends of the switching value sensor 111 and the state monitoring sensor 112, and the analog-to-digital conversion module 121 is configured to convert the switching value signal and the state monitoring signal from an analog signal to a digital signal to obtain a digital monitoring signal; the input end of the microprocessor 122 is connected to the output end of the analog-to-digital conversion module 121, the output end of the microprocessor 122 is connected to the processing device 130, and the microprocessor 122 is configured to receive the digital monitoring signal and send the digital monitoring signal to the processing device 130.
In this embodiment, the digital monitoring signal refers to a set of digital signals into which the switching value signal is converted and digital signals into which the state monitoring signal is converted. Specifically, the analog-to-digital conversion module 121 converts the switching value signal and the state monitoring signal from an analog signal to a digital signal, which may be a time-division conversion of one of the signals or a simultaneous conversion of all the signals, and is not limited herein. Microprocessor 122 refers to a central processing unit comprised of one or a few large scale integrated circuits that perform the functions of a control unit and an arithmetic logic unit. Optionally, the microprocessor 122 and the processing device 130 may be connected via a network.
Specifically, the analog-to-digital conversion module 121 is connected to all the state monitoring sensors 112 from the switching value sensor 111, so as to receive the switching value signal monitored by the switching value sensor 111 and the state monitoring signal monitored by the state monitoring sensors 112, convert the switching value signal and the state monitoring signal into digital signals, obtain digital monitoring signals, and send the digital monitoring signals to the processing device 130 through the microprocessor 122, so that the processing device 130 can restore the digital monitoring signals into analog signals, and determine whether the operating state of the circuit breaker 200 is normal.
In an embodiment, optionally, the microprocessor 122 is further connected to at least one of the monitoring sensors 110, and the microprocessor 122 is further configured to receive a driving signal sent by the processing device 130 and drive at least one of the monitoring sensors 110 to operate based on the driving signal.
In one embodiment, the signal acquisition device 120 further comprises a first storage module 123, and the first storage module 123 comprises a first ROM memory and a first RAM memory. ROM memories (Read-Only memories) operate in a non-destructive Read mode, and Only Read-out information that cannot be written to. The information is fixed after being written once, and the information is not lost even if the power supply is cut off. RAM memories (Random Access memories) can write (store) or read (retrieve) information from any one of designated addresses at any time while operating. The biggest difference with the ROM is the volatility of data, i.e. the stored data will be lost as soon as power is turned off. RAM is used in computers and digital systems to temporarily store programs, data, and intermediate results.
In the present implementation, the digital monitoring signal, i.e., the sampling data, can be temporarily stored by the first ROM memory and the first RAM memory.
In the embodiment, the digital monitoring signals are stored in the first ROM and the first RAM, and can be stored and taken out when the signal transmission channel is blocked, so that the data transmission is ensured to be carried out in real time, and the utilization rate of the operation monitoring system is improved.
In this embodiment, specifically, the microprocessor 122 is connected to at least one of the monitoring sensors 110, and the processing device 130 can send a driving signal to the microprocessor 122, so as to control the operation of at least one of the connected monitoring sensors 110 through the microprocessor 122.
With continued reference to fig. 2, in one embodiment, optionally, the signal acquisition device 120 further comprises a programmable gate array 124, wherein:
the input end of the programmable gate array 124 is connected to the output end of the analog-to-digital conversion module 121, the output end of the programmable gate array 124 is connected to the input end of the microprocessor 122, and the programmable gate array 124 is configured to control the analog-to-digital conversion module 121 to perform signal conversion, receive the digital monitoring signal sent by the analog-to-digital conversion module 121, and package the received digital monitoring signal and send the packaged digital monitoring signal to the microprocessor 122.
The Programmable Gate Array 124 (FPGA) is a semi-custom circuit. In this embodiment, specifically, the programmable gate array 124 controls the analog-to-digital conversion module 121 to perform signal conversion, receives the digital monitoring signal after the analog-to-digital conversion module 121 completes the conversion, and packages the received digital monitoring signal and sends the packaged digital monitoring signal to the microprocessor 122.
With continued reference to fig. 2, in one embodiment, optionally, the signal acquisition device 120 further comprises a monitoring module 125, wherein:
the monitoring module 125 is connected to the microprocessor 122, and the monitoring module 125 is configured to periodically check an internal condition of the microprocessor 122, and send a restart signal to the microprocessor 122 when an error occurs in the microprocessor 122, where the restart signal is used to instruct the microprocessor 122 to restart.
In this embodiment, specifically, since the operation of the microprocessor 122 is often interfered by an external electromagnetic field, data confusion of various registers and memories may be caused, a program pointer may be wrong, the program pointer is not in a program area, a wrong program instruction may be fetched, and the like, which may result in a dead loop, and if a normal operation of the program is interrupted, the microprocessor 122 cannot continue to operate normally, resulting in a dead state of the entire system, and an unexpected result. The monitoring module 125 is essentially a timer circuit, typically having an input and an output, the output typically being connected to a reset terminal of another component, typically the microprocessor 122.
In this embodiment, the monitoring module 125 periodically checks the internal condition of the microprocessor 122, and when the microprocessor 122 makes an error, a restart signal is sent to the microprocessor 122, so as to instruct the microprocessor 122 to restart, thereby preventing the microprocessor 122 from entering a dead cycle, and improving the stability of monitoring the operating state of the circuit breaker 200.
With continued reference to fig. 2, in one embodiment, the processing device 130 optionally includes a server 131 and a second storage module 132. The server 131 is connected to the microprocessor 122, and the server 131 is configured to receive the digital monitoring signal sent by the microprocessor 122, so as to determine whether the operating state of the circuit breaker 200 is normal based on the digital monitoring signal. The second storage module 132 is connected to the server 131, and the second storage module 132 is used for storing the status data of the circuit breaker 200 and providing a platform for the software operation of the server 131.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an analog-to-digital conversion module 121 according to an embodiment. In one embodiment, as shown in fig. 3, the analog-to-digital conversion module 121 includes an analog-to-digital converter 1211, wherein:
the analog-to-digital converter 1211 is configured to convert an analog signal into a digital signal, and the analog-to-digital converter 1211 is configured with a control register, a status register, a channel selection register, and a result register; the control register is used for controlling the analog-to-digital converter 1211 to start or stop conversion; the status register is used for controlling a conversion mode of the analog-to-digital converter 1211 for signal conversion; the channel selection register is used for controlling the analog-to-digital converter 1211 to receive at least one transmitted analog signal of the monitoring sensor 110; the result register is used for storing the conversion result of the digital-to-analog converter conversion signal.
The conversion mode adc 1211 converts the mode of the signal. Specifically, the conversion method includes, but is not limited to, the sampling rate and resolution of the analog-to-digital converter 1211 for signal conversion. According to the sampling theorem, the sampling frequency fs of the a/D converter should be larger than 2Wa (Wa being the bandwidth of the sampled signal). In practice, fs >2.5Wa is generally selected due to the influence of factors such as nonlinearity of the a/D conversion device, quantization noise, distortion, and receiver noise. The selection of the number of bits of the sampling value needs to meet the requirements of a certain dynamic range and the processing precision of a digital part, and the number of bits cannot be lower than 12 bits under the requirement of the dynamic range of the general resolution of 80 dB.
In this embodiment, the monitoring sensor 110 is connected to an analog-to-digital converter 1211, and the channel selection register controls a transmission path between the analog-to-digital converter 1211 and the monitoring sensor 110 to be turned on or off, so as to control the analog-to-digital converter 1211 to receive an analog signal transmitted by at least one of the monitoring sensors 110, so that the analog-to-digital converter 1211 converts the received analog signal into a digital signal. Specifically, the analog-to-digital converter 1211 may receive the analog signal when the transmission path is turned on. Alternatively, when the monitoring sensors 110 are multiple sets, and the multiple sets of monitoring sensors 110 share one analog-to-digital converter 1211, the channel selection register may further control the analog-to-digital converter 1211 to receive the analog signal transmitted by one of the multiple sets of monitoring sensors 110.
In this embodiment, the register controls the operating state of the analog-to-digital converter 1211, so that the analog-to-digital converter 1211 can be adjusted as required, thereby improving convenience.
It should be noted that, when the signal acquisition device 120 includes the programmable gate array 124, the programmable gate array 124 is respectively connected to the control register, the state register, the channel selection register and the result register, and the programmable gate array 124 controls the operation of the analog-to-digital converter 1211 through the control register, the state register, the channel selection register and the result register.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another operation monitoring system for a circuit breaker according to an embodiment. In one embodiment, as shown in fig. 4, the operation monitoring system of the circuit breaker further includes a human-computer interaction device 140, wherein:
the human-computer interaction device 140 is connected to the processing device 130, and the human-computer interaction device 140 is configured to provide a monitoring screen of the circuit breaker 200 and provide an operation interface for a user.
Specifically, the user may click the operation interface to send a driving signal to the microprocessor 122 through the processing device 130, so as to control at least one of the monitoring sensors 110 to be turned on or off. In addition, the monitoring screen may display the real-time operating status of the circuit breaker 200, thereby providing visual monitoring of the circuit breaker 200.
In this embodiment, the human-computer interaction device 140 may be an input/output device, and the output device may display the software running status and provide a monitoring picture; the operation instruction can be used for conveniently operating the operation monitoring system of the circuit breaker through the input equipment.
With continued reference to fig. 4, in one embodiment, optionally, the circuit breaker operation monitoring system further includes a signal preprocessing device 150, wherein:
the input end of the signal preprocessing device 150 is connected to the output end of the monitoring sensor 110, the output end of the signal preprocessing device 150 is connected to the analog-to-digital conversion module 121, and the signal preprocessing device 150 is configured to filter out a non-periodic component and a higher harmonic of at least one of the switching value signal and the state monitoring signal, and convert the filtered signal into a signal interval matched with the analog-to-digital conversion module 121.
In this embodiment, the signal interval matched by the analog-to-digital conversion module 121 refers to a signal interval suitable for the analog-to-digital conversion module 121 to operate. For example, the signal interval for analog-to-digital conversion matching may be a 0V-3V voltage signal. The signal interval of the present embodiment is related to the analog-to-digital conversion module 121, and the present embodiment is not limited in particular.
In this embodiment, the signal preprocessing device 150 filters the non-periodic component and the higher harmonic of at least one of the switching value signal and the state monitoring signal, and then the filtered signal is used to determine the operating state of the circuit breaker 200, so that the accuracy of determination can be improved. In addition, by converting the signal into a signal interval matched with the analog-to-digital conversion module 121, the analog-to-digital conversion module 121 can be protected, and the working stability and the safety of the analog-to-digital conversion module 121 are improved.
With continued reference to fig. 4, in one embodiment, the circuit breaker operation monitoring system optionally further includes a function device 160. The function device 160 is connected to the programmable gate array 124, and the function device 160 is used for adding new functions.
In this embodiment, when a new function needs to be added to the system, the addition is performed by the function device 160. The present embodiment improves the adaptability of the system by setting the function device 160 as an interface for adding the new function.
Referring to fig. 5, fig. 5 is a schematic flowchart illustrating an operation monitoring method of a circuit breaker according to an embodiment. In one embodiment, as shown in fig. 5, there is provided an operation monitoring method of a circuit breaker, including:
and step 510, acquiring the switching value signal and the plurality of state monitoring signals acquired by the signal acquisition device.
The switching value signal is a signal obtained by monitoring the switching state of the circuit breaker through a switching value sensor. Specifically, the switching value signal represents the open/close state of the circuit breaker. The state monitoring signal is a signal obtained by monitoring the operating state of the circuit breaker through a state monitoring sensor. The state monitoring signals of the embodiment are multiple, and the multiple state monitoring signals are obtained by monitoring through multiple types of state monitoring sensors. In this embodiment, reference may be made to the description of any one of the above embodiments for connection relationship between elements, which is not described in detail in this embodiment.
And step 520, determining whether the operation state of the circuit breaker is normal or not based on the switching value signal and the plurality of state monitoring signals.
In this step, specifically, when the switching value signal indicates that the circuit breaker is in the closed state, whether the operation state of the circuit breaker is normal is determined according to the plurality of state monitoring signals.
It can be understood that, when the switching value signal represents that the circuit breaker is in the closed state, whether the operation state of the circuit breaker is normal or not is determined, and if the switching value signal represents that the circuit breaker is in the open state, whether the operation state of the circuit breaker is normal or not is not determined, so that the calculation resources can be saved.
In one embodiment, optionally, the step of determining whether the operation state of the circuit breaker is normal according to the plurality of state monitoring signals includes:
comparing each state monitoring signal with a corresponding preset fault signal to obtain comparison similarity; and if the comparison similarity is greater than the preset similarity, the running state corresponding to the state monitoring signal is abnormal.
In this embodiment, the preset fault signal refers to a signal that the circuit breaker shows in a fault state when a fault simulation experiment is performed. Therefore, if the similarity between the state monitoring signal and the corresponding preset fault signal is high, it is determined that the state monitoring signal is similar to the preset monitoring signal, and the operating state corresponding to the state monitoring signal is considered to be abnormal. Specifically, the type of the status monitoring signal is related to the type of the status monitoring sensor, and the present embodiment is not limited to the specific signal of the plurality of status monitoring signals.
Optionally, the plurality of condition monitoring signals includes, but is not limited to, at least two of a coil current signal, a displacement amount signal, a vibration signal, and a temperature signal. Specifically, when the similarity between the coil current signal and the corresponding preset fault signal is greater than the preset similarity, the coil in the circuit breaker works abnormally; when the similarity between the displacement signals and the corresponding preset fault signals is greater than the preset similarity, the displacement deviation of the element is over-large; when the similarity between the vibration signal and the corresponding preset fault signal is greater than the preset similarity, the fact that the vibration of the whole circuit breaker is abnormal is indicated; and when the similarity between the temperature signal and the corresponding preset fault signal is greater than the preset similarity, indicating that the temperature of the circuit breaker is abnormal.
It should be noted that the preset similarities corresponding to different status monitoring signals may be the same or different, and are not limited herein.
In this embodiment, through the switching value signal and the multiple state monitoring signal that acquire signal acquisition device collection, and based on the switching value signal with the multiple state monitoring signal confirms whether the running state of circuit breaker is normal, can monitor the running state of circuit breaker in real time, can in time discover when the circuit breaker is unusual. In addition, the specific abnormity of the circuit breaker can be determined through different state monitoring signals.
It should be understood that, although the steps in the flowchart of fig. 5 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 5 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An operation monitoring system of a circuit breaker, comprising:
the monitoring sensor comprises a switching value sensor and a plurality of types of state monitoring sensors, the switching value sensor is used for being connected with a circuit breaker to be monitored so as to monitor the switching state of the circuit breaker to obtain a switching value signal, and the state monitoring sensors are respectively used for being connected with the circuit breaker so as to monitor the running state of the circuit breaker to obtain a plurality of state monitoring signals;
the input end of the signal acquisition device is connected with the output end of the monitoring sensor, and the signal acquisition device is used for acquiring the switching value signal and a plurality of state monitoring signals;
the input end of the processing device is connected with the output end of the signal acquisition device, and the processing device is used for determining whether the running state of the circuit breaker is normal or not based on the switching value signals acquired by the signal acquisition device and the plurality of state monitoring signals.
2. The operation monitoring system of the circuit breaker according to claim 1, wherein the plurality of types of condition monitoring sensors include at least two of a current sensor, a displacement sensor, a vibration sensor, and a temperature sensor.
3. The operation monitoring system of the circuit breaker according to claim 1, wherein the signal acquisition device comprises:
the input end of the analog-to-digital conversion module is respectively connected with the output ends of the switching value sensor and the state monitoring sensor, and the analog-to-digital conversion module is used for converting the switching value signal and the state monitoring signal from an analog signal to a digital signal to obtain a digital monitoring signal;
the input end of the microprocessor is connected with the output end of the analog-to-digital conversion module, the output end of the microprocessor is connected with the processing device, and the microprocessor is used for receiving the digital monitoring signal and sending the digital monitoring signal to the processing device.
4. The circuit breaker operation monitoring system of claim 3, wherein the signal acquisition device further comprises:
the input end of the programmable gate array is connected with the output end of the analog-to-digital conversion module, the output end of the programmable gate array is connected with the input end of the microprocessor, and the programmable gate array is used for controlling the analog-to-digital conversion module to perform signal conversion, receiving the digital monitoring signals sent by the analog-to-digital conversion module, and sending the received digital monitoring signals to the microprocessor after being packaged.
5. The circuit breaker operation monitoring system of claim 3, wherein the analog-to-digital conversion module comprises:
the analog-to-digital converter is used for converting an analog signal into a digital signal and is provided with a control register, a state register, a channel selection register and a result register;
the control register is used for controlling the analog-to-digital converter to start conversion or stop conversion;
the state register is used for controlling a conversion mode of the analog-to-digital converter for signal conversion;
the channel selection register is used for controlling the analog-to-digital converter to receive at least one analog signal sent by the monitoring sensor;
the result register is used for storing the conversion result of the digital-to-analog converter conversion signal.
6. The system for monitoring the operation of a circuit breaker according to claim 3, wherein the microprocessor is further connected to at least one of the monitoring sensors, and the microprocessor is further configured to receive the driving signal sent by the processing device and drive at least one of the monitoring sensors to operate based on the driving signal.
7. The circuit breaker operation monitoring system of claim 3, wherein the signal acquisition device further comprises:
the monitoring module is connected with the microprocessor and used for regularly checking the internal condition of the microprocessor and sending a restarting signal to the microprocessor when the microprocessor has an error, and the restarting signal is used for indicating the microprocessor to restart.
8. The operation monitoring system of a circuit breaker according to claim 1, further comprising:
and the human-computer interaction device is connected with the processing device and is used for providing a monitoring picture of the circuit breaker and providing an operation interface for a user.
9. The operation monitoring system of a circuit breaker according to claim 3, further comprising:
the input end of the signal preprocessing device is connected with the output end of the monitoring sensor, the output end of the signal preprocessing device is connected with the analog-to-digital conversion module, and the signal preprocessing device is used for filtering out non-periodic components and higher harmonics of at least one of the switching value signals and the state monitoring signals and converting the filtered signals into signal intervals matched with the analog-to-digital conversion module.
10. An operation monitoring method of a circuit breaker, characterized by comprising:
the method comprises the steps that a switching value signal and a plurality of state monitoring signals acquired by a signal acquisition device are acquired, the switching value signal is obtained by monitoring the switching state of a circuit breaker through a switching value sensor, the switching value sensor is connected with the circuit breaker to be monitored, the state monitoring signals are obtained by monitoring the running state of the circuit breaker through various types of state monitoring sensors, and the state monitoring sensors are respectively connected with the circuit breaker;
and determining whether the operation state of the circuit breaker is normal or not based on the switching value signal and the plurality of state monitoring signals.
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