CN117233515B - Method and system for measuring state of outlet pressing plate - Google Patents
Method and system for measuring state of outlet pressing plate Download PDFInfo
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Abstract
The invention discloses a method and a system for measuring the state of an outlet pressing plate, which relate to the technical field of relay protection detection, wherein when an outlet pressing plate state measurement request is received, a check parameter corresponding to the outlet pressing plate to be measured and a grounding resistance value of an impedance grounding device are obtained, a corresponding check voltage value is determined according to the grounding resistance value, the check parameter and a preset resistance value adjusting function, whether the check voltage value is smaller than a preset voltage threshold value is judged, when the check voltage value is smaller than the voltage threshold value, measurement data of the outlet pressing plate to be measured are acquired through the impedance grounding device, and a measurement result of the outlet pressing plate to be measured is determined according to a comparison result of the measurement data and preset early warning data. The technical problems that the switching state of the existing outlet pressing plate is mainly detected manually, but the multimeter is switched to a resistance gear or a current gear due to manual misoperation, the protection screen outlet pressing plate is prone to causing misoperation of a switch, and the reliability of the outlet pressing plate is reduced are solved.
Description
Technical Field
The invention relates to the technical field of relay protection detection, in particular to an outlet pressing plate state measuring method and system.
Background
With the rapid development and wide application of computer, network communication and database technologies, the automation level of the transformer substation is rapidly developed to climb the peak, so that the running efficiency and the safety of the power grid are greatly improved. Relay protection is an important component of substation automation systems, and the device itself has a relatively high level of automation. However, in view of the extreme importance of visual breakpoints on safe operation and maintenance of a relay protection system, relay protection functions still commonly adopt a mode of manual operation of a protection pressing plate to switch on and off, so that communication interaction and an automatic process of relay protection, a measurement and control unit and a remote terminal are limited to a certain extent.
The relay protection outlet protection pressing plate acts on the tripping operation of the circuit breaker and other protection function starting, is a function demarcation point and a state monitoring blind point of a control loop of the protection device and primary equipment, and the switching state detection is mainly performed manually at present, but because a multimeter is switched to a resistance gear or a current gear by manual misoperation, the protection screen outlet pressing plate is easy to cause misoperation of a switch, and the reliability of the outlet pressing plate is reduced.
Disclosure of Invention
The invention provides a method and a system for measuring the state of an outlet pressing plate, which solve the technical problems that the switching state of the outlet pressing plate of a protection screen is easy to cause misoperation of a switch and the reliability of the outlet pressing plate is reduced because a multimeter is switched to a resistance gear or a current gear by manual misoperation in the existing detection of the switching state of the outlet pressing plate mainly through manual detection.
The invention provides a method for measuring the state of an outlet pressing plate, which relates to an outlet pressing plate to be measured, wherein the outlet pressing plate to be measured is connected with an impedance grounding device, and the method comprises the following steps:
when an outlet pressing plate state measurement request is received, acquiring a verification parameter corresponding to the outlet pressing plate to be detected and a grounding resistance value of the impedance grounding device;
determining a corresponding check voltage value according to the grounding resistance value, the check parameter and a preset resistance value adjusting function;
judging whether the check voltage value is smaller than a preset voltage threshold value or not;
when the verification voltage value is smaller than the voltage threshold value, acquiring measurement data of the outlet pressing plate to be detected through the impedance grounding device;
and determining the measurement result of the outlet pressing plate to be measured according to the comparison result of the measurement data and preset early warning data.
Optionally, the step of determining the corresponding check voltage value according to the ground resistance value, the check parameter and a preset resistance adjustment function includes:
inputting the grounding resistance value and the verification parameter into a preset resistance value adjusting function to generate a corresponding first node voltage value and a corresponding second node voltage value;
and adding the first node voltage value and the second node voltage value to generate a check voltage value.
Optionally, the measurement data includes a stylus voltage value and a monitoring voltage value, the early warning data includes an early warning threshold value and an early warning interval, and the step of determining the measurement result of the outlet platen to be measured according to the comparison result of the measurement data and preset early warning data includes:
judging whether the voltage value of the stylus is larger than the early warning threshold value or not;
if the voltage value of the meter pen is larger than the early warning threshold value, determining the measurement result of the outlet pressing plate to be measured as abnormal impedance grounding device;
if the voltage value of the stylus is smaller than or equal to the early warning threshold value, judging whether the monitoring voltage value is in the early warning interval or not;
if the monitoring voltage value is not in the early warning interval, determining the measurement result as abnormal outlet pressing plate;
and if the monitoring voltage value is in the early warning interval, determining the measuring result as that the outlet pressing plate is normal.
Optionally, the method further comprises:
when the measurement result is that the impedance grounding device is abnormal, starting an alarm circuit in the impedance grounding device and acquiring an instrument measurement end image in the impedance grounding device through a monitoring circuit in the impedance grounding device;
inputting the image of the measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram; the anomaly detection model is used for analyzing an input image of a measuring end of the instrument and outputting a corresponding anomaly characteristic map;
inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
Optionally, the method further comprises:
when the verification voltage value is greater than or equal to the voltage threshold value, the grounding resistance value is adjusted;
and skipping to execute the step of determining the corresponding check voltage value according to the grounding resistance value, the check parameter and the preset resistance value adjusting function until the check voltage value is smaller than the voltage threshold value.
Optionally, the resistance adjustment function specifically includes:
；
wherein,balance bridge arm resistance value for DC system, < >>Balance resistance for DC system, +.>For the resistance value of the coil, ">Is the variable resistance value of the grounding resistance, +.>For action time->Is a time constant->Is the direct current positive end to ground voltage, +.>For the direct current negative terminal voltage to ground, +.>For the first node voltage value, < >>For the second node voltage value, ">Is the DC system voltage value.
The invention provides an outlet pressing plate state measuring system, which relates to an outlet pressing plate to be measured, wherein the outlet pressing plate to be measured is connected with an impedance grounding device, and the system comprises:
the acquisition module is used for acquiring the verification parameters corresponding to the outlet pressing plate to be detected and the grounding resistance value of the impedance grounding device when receiving the outlet pressing plate state measurement request;
the verification voltage acquisition module is used for determining a corresponding verification voltage value according to the grounding resistance value, the verification parameter and a preset resistance value adjusting function;
the first analysis module is used for judging whether the check voltage value is smaller than a preset voltage threshold value or not;
the data acquisition module is used for acquiring measurement data of the outlet pressing plate to be detected through the impedance grounding device when the verification voltage value is smaller than the voltage threshold value;
and the second analysis module is used for determining the measurement result of the outlet pressing plate to be measured according to the comparison result of the measurement data and preset early warning data.
Optionally, the verification voltage acquisition module includes:
the node voltage submodule is used for inputting the grounding resistance value and the verification parameter into a preset resistance regulating function to generate a corresponding first node voltage value and a corresponding second node voltage value;
and the verification voltage sub-module is used for adding the first node voltage value and the second node voltage value to generate a verification voltage value.
Optionally, the measurement data includes a stylus voltage value and a monitored voltage value, the early warning data includes an early warning threshold value and an early warning interval, and the second analysis module includes:
the first judging submodule is used for judging whether the pen voltage value is larger than the early warning threshold value or not;
if the voltage value of the meter pen is larger than the early warning threshold value, determining the measurement result of the outlet pressing plate to be measured as abnormal impedance grounding device;
the second judging submodule is used for judging whether the monitoring voltage value is in the early warning interval or not if the pen voltage value is smaller than or equal to the early warning threshold value;
if the monitoring voltage value is not in the early warning interval, determining the measurement result as abnormal outlet pressing plate;
and if the monitoring voltage value is in the early warning interval, determining the measuring result as that the outlet pressing plate is normal.
Optionally, the method further comprises an anomaly analysis module:
when the measurement result is that the impedance grounding device is abnormal, starting an alarm circuit in the impedance grounding device and acquiring an instrument measurement end image in the impedance grounding device through a monitoring circuit in the impedance grounding device;
inputting the image of the measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram; the anomaly detection model is used for analyzing an input image of a measuring end of the instrument and outputting a corresponding anomaly characteristic map;
inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
From the above technical scheme, the invention has the following advantages:
when an outlet pressing plate state measurement request is received, a check parameter corresponding to the outlet pressing plate to be measured and a grounding resistance value of the impedance grounding device are obtained, a corresponding check voltage value is determined according to the grounding resistance value, the check parameter and a preset resistance value adjusting function, whether the check voltage value is smaller than a preset voltage threshold value is judged, when the check voltage value is smaller than the voltage threshold value, measurement data of the outlet pressing plate to be measured are collected through the impedance grounding device, and a measurement result of the outlet pressing plate to be measured is determined according to a comparison result of the measurement data and preset early warning data. The technical problems that the switching state of the existing outlet pressing plate is mainly detected manually, but the multimeter is switched to a resistance gear or a current gear due to manual misoperation, the protection screen outlet pressing plate is prone to causing misoperation of a switch, and the reliability of the outlet pressing plate is reduced are solved. According to the method and the device, the impedance grounding device is externally connected when the state of the outlet pressing plate is detected, and the grounding impedance value of the impedance grounding device is adjusted according to the verification parameter of the system where the outlet pressing plate to be detected is located, so that the accident of misoperation of the circuit breaker caused by artificial or instrument faults in the detection process is avoided, the abnormal position can be timely confirmed by alarming through the impedance grounding device, and the reliability of the outlet pressing plate is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a flowchart showing a method for measuring the status of an outlet platen according to an embodiment of the present invention;
FIG. 2 is a flowchart showing a method for measuring the status of an outlet platen according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of an impedance grounding device according to a second embodiment of the present invention;
FIG. 4 is a block diagram illustrating a third embodiment of an outlet platen status measurement system;
wherein the reference numerals have the following meanings:
1. an alarm circuit; 2. the instrument measuring end; 3. a monitoring circuit; 4. an internal circuit; 5. and a grounding end.
Detailed Description
The embodiment of the invention provides a method and a system for measuring the state of an outlet pressing plate, which are used for solving the technical problems that the switching state of the outlet pressing plate of a protection screen is easy to cause misoperation of a switch and the reliability of the outlet pressing plate is reduced because a multimeter is switched to a resistance gear or a current gear by manual misoperation in the existing detection of the switching state of the outlet pressing plate.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for measuring an outlet platen status according to an embodiment of the invention.
The invention provides a method for measuring the state of an outlet pressing plate, which relates to an outlet pressing plate to be measured, wherein the outlet pressing plate to be measured is connected with an impedance grounding device, and the method comprises the following steps:
and 101, when an outlet pressing plate state measurement request is received, acquiring a verification parameter corresponding to the outlet pressing plate to be detected and a grounding resistance value of the impedance grounding device.
The outlet pressure plate state measurement request refers to a detection request sent by an operation and maintenance person in need of detecting the state of the outlet pressure plate at the current moment before the operation is performed on the outlet pressure plate.
The verification parameters refer to operation data of the direct current system of the transformer substation where the outlet pressing plate is located, wherein the operation data comprise, but are not limited to, a resistance value of a balance bridge arm of the direct current system, a balance resistance value of the direct current system, a resistance value of a coil, action time, a direct current positive end grounding voltage and a direct current negative end grounding voltage.
In the embodiment of the invention, when receiving the state measurement request of the outlet pressing plate sent by the operation and maintenance personnel, the verification parameters corresponding to the outlet pressing plate to be detected and the grounding resistance value of the impedance grounding device are obtained.
The impedance grounding device is connected with the outlet pressing plate, so that misoperation of a breaker of a direct current system where the outlet pressing plate is located due to manual or instrument faults can be avoided, and grounding of the direct current system where the outlet pressing plate is located can be prevented.
Step 102, determining a corresponding check voltage value according to the grounding resistance value, the check parameter and a preset resistance value adjusting function.
In the embodiment of the invention, the ground resistance value and the verification parameter are input into a preset group value adjusting function to generate a corresponding first node voltage value and second node voltage value, and the first node voltage value and the second node voltage value are added to generate the verification voltage value.
Step 103, judging whether the verification voltage value is smaller than a preset voltage threshold value.
In the embodiment of the invention, whether the check voltage value is smaller than a preset voltage threshold value is judged.
The voltage threshold is a product between the rated voltage value of the coil operation and the early warning coefficient, and is, for example, 0.3×the rated voltage value of the coil operation.
And 104, collecting measurement data of the outlet pressing plate to be tested through the impedance grounding device when the verification voltage value is smaller than the voltage threshold value.
The measurement data refer to a meter voltage value and a monitoring voltage value, wherein the monitoring voltage value is a voltage value to the ground at two ends of an outlet pressing plate to be measured, and the meter voltage value is a voltage value at two ends of a universal meter.
In the embodiment of the invention, when the verification voltage value is smaller than the voltage threshold value, the measured data of the outlet pressing plate to be measured is collected through the impedance grounding device.
It should be noted that, the impedance grounding device may be, but is not limited to, connected to the outlet platen through a multimeter, and collects measurement data of the outlet platen to be measured.
And 105, determining a measurement result of the outlet pressing plate to be measured according to a comparison result of the measurement data and preset early warning data.
The early warning threshold value refers to an early warning threshold value and an early warning interval, wherein the early warning threshold value is used for judging whether the multimeter switches wrong gears or fails. The early warning section is used for judging whether the state of the outlet pressing plate to be detected is abnormal or not.
In the embodiment of the invention, the measurement result of the outlet pressing plate to be measured is determined according to the comparison result between the voltage value of the stylus and the early warning threshold value and the comparison result between the detection voltage value and the early warning interval.
In the embodiment of the invention, when an outlet pressing plate state measurement request is received, a check parameter corresponding to an outlet pressing plate to be measured and a grounding resistance value of an impedance grounding device are obtained, a corresponding check voltage value is determined according to the grounding resistance value, the check parameter and a preset resistance value adjusting function, whether the check voltage value is smaller than a preset voltage threshold value is judged, when the check voltage value is smaller than the voltage threshold value, measurement data of the outlet pressing plate to be measured are acquired through the impedance grounding device, and a measurement result of the outlet pressing plate to be measured is determined according to a comparison result of the measurement data and preset early warning data. The technical problems that the switching state of the existing outlet pressing plate is mainly detected manually, but the multimeter is switched to a resistance gear or a current gear due to manual misoperation, the protection screen outlet pressing plate is prone to causing misoperation of a switch, and the reliability of the outlet pressing plate is reduced are solved. According to the method and the device, the impedance grounding device is externally connected when the state of the outlet pressing plate is detected, and the grounding impedance value of the impedance grounding device is adjusted according to the verification parameter of the system where the outlet pressing plate to be detected is located, so that the accident of misoperation of the circuit breaker caused by artificial or instrument faults in the detection process is avoided, the abnormal position can be timely confirmed by alarming through the impedance grounding device, and the reliability of the outlet pressing plate is improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for measuring a state of an outlet platen according to a second embodiment of the present invention.
The invention provides a method for measuring the state of an outlet pressing plate, which relates to an outlet pressing plate to be measured, wherein the outlet pressing plate to be measured is connected with an impedance grounding device, and the method comprises the following steps:
step 201, when receiving a status measurement request of the outlet pressing plate, acquiring a verification parameter corresponding to the outlet pressing plate to be tested and a grounding resistance value of the impedance grounding device.
In the embodiment of the invention, when an outlet pressing plate state measurement request sent by a terminal is received, a verification parameter corresponding to the outlet pressing plate to be detected and a grounding resistance value of the impedance grounding device are obtained.
Step 202, inputting a ground resistance value and a verification parameter into a preset resistance value adjusting function, and generating a corresponding first node voltage value and second node voltage value.
In the embodiment of the invention, a ground resistance value and a verification parameter are input into a preset resistance value adjusting function to generate a corresponding first node voltage value and second node voltage value.
It should be noted that the resistance adjustment function specifically includes:
；
wherein,balance bridge arm resistance value for DC system, < >>Balance resistance for DC system, +.>For the resistance value of the coil, ">Is the variable resistance value of the grounding resistance, +.>For action time->Is a time constant->Is the direct current positive end to ground voltage, +.>For the direct current negative terminal voltage to ground, +.>For the first node voltage value, < >>For the second node voltage value, ">Is the DC system voltage value.
And 203, adding the first node voltage value and the second node voltage value to generate a check voltage value.
In the embodiment of the invention, the sum value between the first node voltage value and the second node voltage value is calculated, and the sum value is used as the verification voltage value.
Step 204, determining whether the verification voltage value is smaller than a preset voltage threshold.
In the embodiment of the invention, whether the check voltage value is smaller than the rated voltage value of the coil operation is judged.
And 205, collecting measurement data of the outlet pressing plate to be tested through the impedance grounding device when the verification voltage value is smaller than the voltage threshold value.
In the embodiment of the invention, if the verification voltage value at the current moment is smaller than the voltage threshold value, a detection loop is formed between the on-resistance grounding device and the outlet pressing plate.
Further, the method further comprises the following steps:
and S11, when the verification voltage value is greater than or equal to the voltage threshold value, regulating the grounding resistance value.
In the embodiment of the present invention, referring to fig. 3, when the verification voltage is greater than or equal to 0.3×coil operation rated voltage, the internal circuit 4 of the grounding impedance device is adjusted by the adjusting knob to adjust the grounding resistance.
S12, jumping to execute the step of determining the corresponding check voltage value according to the grounding resistance value, the check parameter and the preset resistance value adjusting function until the check voltage value is smaller than the voltage threshold value.
In the embodiment of the invention, after the grounding resistance value of the impedance grounding device is regulated, the step of determining the corresponding check voltage value according to the grounding resistance value, the check parameter and a preset resistance value regulating function is carried out in a jumping manner until the check voltage value is smaller than 0.3 coil action rated voltage value. The grounding resistance value of the impedance grounding device is adjusted (so that a shunt effect is achieved on a line when larger capacitance or current is generated), thereby avoiding misoperation of a pressing plate-associated protection system caused by misoperation or device abnormality when the impedance grounding device collects measurement data of an outlet pressing plate to be tested, avoiding abnormality of a direct current system, and ensuring accurate operation of the protection system when the direct current system breaks down.
And 206, determining a measurement result of the outlet pressing plate to be measured according to a comparison result of the measurement data and preset early warning data.
Further, the measurement data includes a stylus voltage value and a monitored voltage value, the early warning data includes an early warning threshold and an early warning interval, and step 206 includes the following sub-steps:
s21, judging whether the voltage value of the stylus is larger than an early warning threshold value.
S22, if the voltage value of the meter pen is larger than the early warning threshold value, determining the measured result of the outlet pressing plate to be measured as abnormal impedance grounding device.
In the embodiment of the present invention, referring to fig. 3, it is determined whether the voltage value of the stylus is greater than the early warning threshold, if the voltage value of the stylus is greater than the early warning threshold, it is indicated that the meter measurement end 2 in the grounding impedance device has a fault or is abnormal in arrangement (for example, the grounding end 5 is not grounded, etc.), the measurement result of the outlet pressing plate to be measured is determined as the abnormality of the impedance grounding device, and whether the impedance grounding device has a fault is determined by comparing the voltage value of the stylus with the early warning threshold.
It should be noted that the meter measuring end 2 may be, but is not limited to, a multimeter.
Further, the method further comprises the following steps:
s221, when the measured result is that the impedance grounding device is abnormal, starting an alarm circuit 1 in the impedance grounding device and acquiring an image of a measuring end of an instrument in the impedance grounding device through a monitoring circuit 3 in the impedance grounding device.
In the embodiment of the present invention, referring to fig. 3, if the measurement result is that the impedance grounding device is abnormal, an alarm circuit 1 in the impedance grounding device is started to remind an operation and maintenance person to check whether the measuring end 2 of the instrument is abnormal or not and collect an image of the measuring end of the instrument in the impedance grounding device through a monitoring circuit 3 in the impedance grounding device.
S222, inputting an image of a measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality feature map; the anomaly detection model is used for analyzing an input image of the measuring end of the instrument and outputting a corresponding anomaly characteristic map.
In the embodiment of the invention, an image of a measuring end of the instrument is input into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram.
In a preferred implementation manner, the anomaly detection model in this embodiment may be obtained by selecting a yolov5s target detection model for improvement and training, and the feature extraction network in the conventional yolov5s target detection model is a framework formed by sequentially connecting 1*1 standard convolution, a first local convolution group, a second local convolution group and a third local convolution group, but the anomaly detection model in this embodiment may select a feature extraction network of MobileNetV3 as the anomaly detection model or replace the first local convolution group in the feature extraction network with a first feature extraction module sequentially connected with 12 3*3 standard convolution layers, replace the second local convolution group with a second feature extraction module sequentially connected with 12 2 x 2 pooled convolution layers, and output the feature extraction result to the feature fusion network by the full connection layer, so that the anomaly detection model is more portable and can accurately identify the micro-object.
In the specific implementation of the embodiment of the application, the embodiment of the invention can also train the abnormality detection model by adopting a training strategy of sine-wakeup, wherein the training strategy of combining Consine Learning Rate with wakeup is a learning rate reduction mode, and the main principle is to attenuate the learning rate of the abnormality detection model by using a Cosine annealing method (Consine Annealing), avoid the abnormality detection model from sinking into a local optimal solution in the training process, train a plurality of steps by using a smaller learning rate, and then train the abnormality detection model by modifying the learning rate into a preset learning rate in the later stage, so that the model has a certain priori knowledge in the early training process, and then train the model by using the preset learning rate to further improve the convergence rate of the model. According to the embodiment, a training strategy (namely, sine-wakeup) combining Consine Learning Rate with wakeup is adopted, so that excessive oscillation of parameters of an anomaly detection model in the early training process can be avoided, a global optimal solution of model parameters is guaranteed, the convergence speed of a loss function can be further improved, and the convergence of a target image segmentation model is accelerated.
S223, inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
In the embodiment of the invention, the image attribute of the abnormal feature map is input into a preset abnormal analysis list, and the corresponding abnormal analysis result is matched. For example, if the image attribute is a resistance range, the abnormality analysis result is determined as a multimeter (meter measuring end 2) being erroneously switched to the resistance range, if the image attribute is a current range, the abnormality analysis result is determined as a multimeter (meter measuring end 2) being erroneously switched to the current range, if the image attribute is a pen, the abnormality analysis result is determined as a pen wiring (meter measuring end 2) being erroneous, and if there is no image attribute, the abnormality analysis result is determined as a multimeter (meter measuring end 2) failure.
S23, if the voltage value of the stylus is smaller than or equal to the early warning threshold value, judging whether the monitored voltage value is in an early warning interval or not;
s24, if the monitored voltage value is not in the early warning interval, determining the measurement result as abnormal of the outlet pressing plate;
and S25, if the monitored voltage value is in the early warning interval, determining the measurement result as that the outlet pressing plate is normal.
In the embodiment of the invention, when the voltage value of the stylus is smaller than or equal to the early warning threshold, judging whether the monitored voltage value is (1+/-0.1) of the voltage theoretical value, if the monitored voltage value is not (1+/-0.1) of the voltage theoretical value, determining the measurement result as abnormal of the outlet pressing plate, and if the monitored voltage value is (1+/-0.1) of the voltage theoretical value, determining the measurement result as normal of the outlet pressing plate.
It should be noted that, when the outlet platen is normal, the monitored voltage value should be (1±0.1) ×voltage theoretical value.
In the embodiment of the invention, when an outlet pressing plate state measurement request is received, a check parameter corresponding to an outlet pressing plate to be measured and a grounding resistance value of an impedance grounding device are obtained, a corresponding check voltage value is determined according to the grounding resistance value, the check parameter and a preset resistance value adjusting function, whether the check voltage value is smaller than a preset voltage threshold value is judged, when the check voltage value is smaller than the voltage threshold value, measurement data of the outlet pressing plate to be measured are acquired through the impedance grounding device, and a measurement result of the outlet pressing plate to be measured is determined according to a comparison result of the measurement data and preset early warning data. The technical problems that the switching state of the existing outlet pressing plate is mainly detected manually, but the multimeter is switched to a resistance gear or a current gear due to manual misoperation, the protection screen outlet pressing plate is prone to causing misoperation of a switch, and the reliability of the outlet pressing plate is reduced are solved. According to the method and the device, the impedance grounding device is externally connected when the state of the outlet pressing plate is detected, and the grounding impedance value of the impedance grounding device is adjusted according to the verification parameter of the system where the outlet pressing plate to be detected is located, so that the accident of misoperation of the circuit breaker caused by artificial or instrument faults in the detection process is avoided, the abnormal position can be timely confirmed by alarming through the impedance grounding device, and the reliability of the outlet pressing plate is improved.
Referring to fig. 4, fig. 4 is a block diagram illustrating an outlet platen status measurement system according to a third embodiment of the present invention.
The third embodiment of the invention provides an outlet pressing plate state measuring system, which relates to an outlet pressing plate to be measured, wherein the outlet pressing plate to be measured is connected with an impedance grounding device, and the system comprises:
the acquisition module 401 is configured to acquire a verification parameter corresponding to an outlet platen to be tested and a ground resistance value of the impedance grounding device when receiving an outlet platen state measurement request;
the verification voltage acquisition module 402 is configured to determine a corresponding verification voltage value according to a ground resistance value, a verification parameter, and a preset resistance value adjustment function;
a first analysis module 403, configured to determine whether the check voltage value is less than a preset voltage threshold;
the data acquisition module 404 is configured to acquire measurement data of the outlet platen to be measured through the impedance grounding device when the verification voltage value is less than the voltage threshold value;
the second analysis module 405 is configured to determine a measurement result of the outlet platen to be measured according to a comparison result of the measurement data and preset pre-warning data.
Further, the verification voltage acquisition module 402 includes:
the node voltage submodule is used for inputting a ground resistance value and a verification parameter into a preset resistance value adjusting function to generate a corresponding first node voltage value and a corresponding second node voltage value;
and the verification voltage sub-module is used for adding the first node voltage value and the second node voltage value to generate a verification voltage value.
Further, the measurement data includes a stylus voltage value and a monitored voltage value, the early warning threshold includes an early warning threshold and an early warning interval, and the second analysis module 405 includes:
the first judging submodule is used for judging whether the voltage value of the stylus is larger than an early warning threshold value or not;
if the voltage value of the meter pen is larger than the early warning threshold value, determining the measured result of the outlet pressing plate to be measured as abnormal impedance grounding device;
the second judging submodule is used for judging whether the monitored voltage value is in an early warning interval or not if the meter voltage value is smaller than or equal to an early warning threshold value;
if the monitored voltage value is not in the early warning interval, determining the measurement result as abnormal of the outlet pressing plate;
if the monitored voltage value is in the early warning interval, the measuring result is determined to be normal of the outlet pressing plate.
Further, the method also comprises an anomaly analysis module:
when the measurement result is that the impedance grounding device is abnormal, starting an alarm circuit 1 in the impedance grounding device and acquiring an instrument measurement end image in the impedance grounding device through a monitoring circuit 3 in the impedance grounding device;
inputting an image of a measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram; the anomaly detection model is used for analyzing an input image of a measuring end of the instrument and outputting a corresponding anomaly characteristic map;
inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
Further, the method also comprises a target impedance adjustment module:
when the verification voltage value is greater than or equal to the voltage threshold value, the grounding resistance value is adjusted;
and skipping to execute the step of determining the corresponding check voltage value according to the grounding resistance value, the check parameter and the preset resistance value adjusting function until the check voltage value is smaller than the voltage threshold value.
Further, the resistance adjustment function specifically includes:
；
wherein,balance bridge arm resistance value for DC system, < >>Balance resistance for DC system, +.>For the resistance value of the coil, ">Is the variable resistance value of the grounding resistance, +.>For action time->Is a time constant->Is the direct current positive end to ground voltage, +.>For the direct current negative terminal voltage to ground, +.>For the first node voltage value, < >>For the second node voltage value, ">Is the DC system voltage value.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The outlet pressing plate state measuring method is characterized by comprising the following steps of:
when an outlet pressing plate state measurement request is received, acquiring a verification parameter corresponding to the outlet pressing plate to be detected and a grounding resistance value of the impedance grounding device;
determining a corresponding check voltage value according to the grounding resistance value, the check parameter and a preset resistance value adjusting function;
judging whether the check voltage value is smaller than a preset voltage threshold value or not;
the voltage threshold is 0.3 times of the rated voltage value of the coil operation;
when the verification voltage value is smaller than the voltage threshold value, acquiring measurement data of the outlet pressing plate to be detected through the impedance grounding device;
determining a measurement result of the outlet pressing plate to be measured according to a comparison result of the measurement data and preset early warning data;
the step of determining the corresponding check voltage value according to the ground resistance value, the check parameter and a preset resistance value adjusting function comprises the following steps:
inputting the grounding resistance value and the verification parameter into a preset resistance value adjusting function to generate a corresponding first node voltage value and a corresponding second node voltage value;
adding the first node voltage value and the second node voltage value to generate a check voltage value;
the measuring data comprises a meter voltage value and a monitoring voltage value, the early warning data comprises an early warning threshold value and an early warning interval, and the step of determining the measuring result of the outlet pressing plate to be measured according to the comparing result of the measuring data and preset early warning data comprises the following steps:
judging whether the voltage value of the stylus is larger than the early warning threshold value or not;
if the voltage value of the meter pen is larger than the early warning threshold value, determining the measurement result of the outlet pressing plate to be measured as abnormal impedance grounding device;
if the voltage value of the stylus is smaller than or equal to the early warning threshold value, judging whether the monitoring voltage value is in the early warning interval or not;
if the monitoring voltage value is not in the early warning interval, determining the measurement result as abnormal outlet pressing plate;
if the monitoring voltage value is in the early warning interval, determining the measuring result as that the outlet pressing plate is normal;
the resistance value adjusting function specifically comprises the following steps:
；
wherein,balance bridge arm resistance value for DC system, < >>Balance resistance for DC system, +.>For the resistance value of the coil, ">Is the variable resistance value of the grounding resistance, +.>For action time->Is a time constant->Is the direct current positive end voltage to the ground,for the direct current negative terminal voltage to ground, +.>For the first node voltage value, < >>For the second node voltage value, ">Is the DC system voltage value.
2. The outlet platen condition measurement method of claim 1, further comprising:
when the measurement result is that the impedance grounding device is abnormal, starting an alarm circuit in the impedance grounding device and acquiring an instrument measurement end image in the impedance grounding device through a monitoring circuit in the impedance grounding device;
inputting the image of the measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram; the anomaly detection model is used for analyzing an input image of a measuring end of the instrument and outputting a corresponding anomaly characteristic map;
inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
3. The outlet platen condition measurement method of claim 1, further comprising:
when the verification voltage value is greater than or equal to the voltage threshold value, the grounding resistance value is adjusted;
and skipping to execute the step of determining the corresponding check voltage value according to the grounding resistance value, the check parameter and the preset resistance value adjusting function until the check voltage value is smaller than the voltage threshold value.
4. An outlet platen state measurement system, characterized in that relates to the outlet platen that awaits measuring, the outlet platen that awaits measuring is connected with impedance earthing device, includes:
the acquisition module is used for acquiring the verification parameters corresponding to the outlet pressing plate to be detected and the grounding resistance value of the impedance grounding device when receiving the outlet pressing plate state measurement request;
the verification voltage acquisition module is used for determining a corresponding verification voltage value according to the grounding resistance value, the verification parameter and a preset resistance value adjusting function;
the first analysis module is used for judging whether the check voltage value is smaller than a preset voltage threshold value or not;
the voltage threshold is 0.3 times of the rated voltage value of the coil operation;
the data acquisition module is used for acquiring measurement data of the outlet pressing plate to be detected through the impedance grounding device when the verification voltage value is smaller than the voltage threshold value;
the second analysis module is used for determining the measurement result of the outlet pressing plate to be measured according to the comparison result of the measurement data and preset early warning data;
the verification voltage acquisition module comprises:
the node voltage submodule is used for inputting the grounding resistance value and the verification parameter into a preset resistance regulating function to generate a corresponding first node voltage value and a corresponding second node voltage value;
the verification voltage sub-module is used for adding the first node voltage value and the second node voltage value to generate a verification voltage value;
the measurement data comprises a meter voltage value and a monitoring voltage value, the early warning data comprises an early warning threshold value and an early warning interval, and the second analysis module comprises:
the first judging submodule is used for judging whether the pen voltage value is larger than the early warning threshold value or not;
if the voltage value of the meter pen is larger than the early warning threshold value, determining the measurement result of the outlet pressing plate to be measured as abnormal impedance grounding device;
the second judging submodule is used for judging whether the monitoring voltage value is in the early warning interval or not if the pen voltage value is smaller than or equal to the early warning threshold value;
if the monitoring voltage value is not in the early warning interval, determining the measurement result as abnormal outlet pressing plate;
if the monitoring voltage value is in the early warning interval, determining the measuring result as that the outlet pressing plate is normal;
the resistance value adjusting function specifically comprises the following steps:
；
wherein,balance bridge arm resistance value for DC system, < >>Balance resistance for DC system, +.>For the resistance value of the coil, ">Is the variable resistance value of the grounding resistance, +.>For action time->Is a time constant->Is the direct current positive end voltage to the ground,for the direct current negative terminal voltage to ground, +.>For the first node voltage value, < >>For the second node voltage value, ">Is the DC system voltage value.
5. The outlet platen condition measurement system of claim 4, further comprising an anomaly analysis module:
when the measurement result is that the impedance grounding device is abnormal, starting an alarm circuit in the impedance grounding device and acquiring an instrument measurement end image in the impedance grounding device through a monitoring circuit in the impedance grounding device;
inputting the image of the measuring end of the instrument into a pre-trained abnormality detection model to generate a corresponding abnormality characteristic diagram; the anomaly detection model is used for analyzing an input image of a measuring end of the instrument and outputting a corresponding anomaly characteristic map;
inputting the image attribute of the abnormal feature map into a preset abnormal analysis list, and matching the corresponding abnormal analysis result.
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