CN117713378A - Control method, system and device for drop-out type breaking device - Google Patents
Control method, system and device for drop-out type breaking device Download PDFInfo
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Abstract
The application relates to a control method, a system and a device of a drop-out type breaking device, wherein the drop-out type breaking device comprises a data acquisition device and communication equipment, the data acquisition device comprises a temperature sensor and a current transformer, and the communication equipment is used for data communication; the method comprises the following steps: acquiring temperature data and current data acquired by the data acquisition unit, and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data; judging a threshold mode according to the overcurrent temperature increase characteristic; and carrying out breaking control on the drop-out breaking device according to the ductility of the threshold mode. The method and the device can reduce misjudgment of overcurrent analysis and reliably control the drop-out type switching-off device.
Description
Technical Field
The application relates to the technical field of power protection, in particular to a control method, a system and a device of a drop-out type breaking device.
Background
In a power system, a drop-out type breaking device is usually arranged between a high-voltage power line and a transformer, wherein the drop-out type breaking device mostly adopts a drop-out type fuse so as to meet the operation and maintenance requirements of the power system such as maintenance and overhaul, power limiting control and the like. These breaking devices include HRC fuses, vacuum circuit breakers, air circuit breakers, and the like. Among them, the air circuit breaker generally does not need a breaking operation, and when an arc is generated, the arc is guided into an arc extinguishing chamber where it is extinguished by mixing and cooling with air, has an ability to automatically break a circuit, does not need to manually break the gate, and once abnormality such as a fault or overcurrent is detected, a contact separator generally cooperates with a spring mechanism to perform a breaking operation. However, although the air circuit breaker has better arc extinguishing performance, in an uncertain overcurrent handling process, the problem of arc extinguishing with prolonged duration of an arc often occurs, when an overcurrent phenomenon in a tolerance range continuously occurs, unstable factors of temperature are formed by arc formation and extinction, and the misjudgment of circuit abnormality such as overload and short circuit of the circuit breaker can be affected by temperature change, so that abnormal normally open operation or unnecessary open operation is performed, and human consumption and material resource consumption caused by the abnormal normally open operation or unnecessary open operation cannot be ignored.
Disclosure of Invention
The invention aims to provide a control method, a system and a device for a drop-out type switching-off device, which can reduce misjudgment of overcurrent analysis and reliably control the drop-out type switching-off device.
In order to achieve the above objective, an embodiment of the present application provides a method for controlling a drop-out breaking device, where the drop-out breaking device includes a data collector and a communication device, the data collector includes a temperature sensor and a current transformer, and the communication device is used for data communication;
the method comprises the following steps:
acquiring temperature data and current data acquired by the data acquisition unit, and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
judging a threshold mode according to the overcurrent temperature increase characteristic;
and carrying out breaking control on the drop-out breaking device according to the ductility of the threshold mode.
Further, the step of obtaining the current temperature increase characteristic of the drop-out switching device according to the temperature data and the current data specifically includes:
the ratio of the difference value of the current value at the current moment and the current value at the previous moment to the difference value of the temperature value at the current moment and the temperature increase threshold value is used as the overcurrent temperature increase characteristic.
Further, the current temperature increase characteristic of the drop-out switching device is obtained according to the temperature data and the current data, and the current temperature increase characteristic is specifically described in the following formula:
；
wherein Crcv and Crcv 'respectively represent current values corresponding to the current calculation time and the previous time, exp () is an exponential function with a natural constant e as a base, crtp and Crtp' respectively represent temperature values corresponding to the current calculation time and the previous time, and Sgtp is a temperature increase threshold.
Further, the temperature increase threshold is obtained according to the following manner:
setting a time interval as a temperature increase search section ETPZone, ETPZone E [60,120] minutes;
curve fitting is carried out on temperature values corresponding to all time in the ETPZone before the current time through mean value filtering treatment, and average values in the obtained fitted curves are respectively recorded as first temperature values;
identifying each sub-climbing section from the obtained fitting curve, wherein the sub-climbing section is a curve part from any minimum value to the first maximum value obtained by searching along time sequence in the fitting curve; defining the sub-climbing section as a type of climbing section if the numerical range of the sub-climbing section contains a first temperature value, and defining the sub-climbing section as a type of climbing section if the minimum value of the sub-climbing section in the numerical range of the sub-climbing section is larger than the first temperature value;
the average value of the set of each type of climbing section is calculated and is recorded as a temperature increase threshold Sgtp.
Further, the judging the threshold mode according to the over-current temperature increase characteristic specifically includes:
in the current temperature increase search section, the average value of the obtained overcurrent temperature increase characteristics of each second-class climbing section is recorded as a first threshold value, and any moment meeting the condition that the overcurrent temperature increase characteristics are larger than the first threshold value is defined as a first-class threshold value point; if the next moment of the class of threshold points is not the class of threshold points, defining the class of threshold points as the class of threshold points, traversing all the moments in reverse time sequence from the class of threshold points until the traversed moment does not belong to the class of threshold points, and forming a set of traversed moments as an abnormal event corresponding to the class of threshold points;
recording the ratio of the maximum value to the minimum value in the current values at each moment under the abnormal event as an overflow weight, and calculating a bit difference weight according to the time difference between the second class threshold points corresponding to the abnormal event and the current moment;
calculating to obtain an abnormal effect state corresponding to the current moment according to the overflow weight and the potential difference weight, and marking an average value of the abnormal effect states corresponding to all moments in the temperature increase search section as an effect state level;
if the abnormal state at the current moment is greater than the state level, the TRUE is assigned to the threshold mode, otherwise, the TRUE is assigned to FALSE.
Further, the judging the threshold mode according to the over-current temperature increase characteristic specifically includes:
setting a time interval as a temperature increase search section ETPZone, ETPZone E [60,120] minutes;
in the current temperature increase search section, taking the sequence formed by the obtained over-current temperature increase characteristics as a flow sign monitoring sequence and taking the moment corresponding to each maximum value in the flow sign monitoring sequence as an over-current sign time point;
screening an overcurrent sign section from a temperature increase search section according to the positioning of the overcurrent sign time point, making a difference between a current value at any moment and a current value at the previous moment and marking the difference as a point current increment, and defining a moment when the current increment is smaller than a current increment threshold value as an increment depression point; the method comprises the steps of calculating the median of each current increment in a temperature increment search section as a current increment threshold;
if one moment is an increment depression point and the corresponding temperature value of the moment has a minimum value, defining the moment meeting the two conditions as a homogeneous moment;
taking a time period from any overcurrent sign time point to the first uniform time point obtained by searching in the reverse time direction as an overcurrent sign section, recording the quantity proportion of increment depression points in the overcurrent sign section as depression point frequency, calculating the average value of overcurrent temperature increase characteristics at each time point in the overcurrent sign section and recording the average value as sign section order value, and calculating according to the depression point frequency and sign Duan Jie value to obtain the overcurrent abnormal effect state at the current time;
the minimum value in the intercept of each flow sign segment is a standard intercept STDs, the overcurrent abnormal state at each moment is constructed into a sequence, the average value of the previous STDs elements of the sequence is used as an overcurrent abnormal state calibration value at the current moment, and the average value of the sequence is used as the overcurrent abnormal state level;
and if the overcurrent abnormal state calibration value at the current moment is larger than the overcurrent abnormal state level, assigning TRUE to the threshold mode, otherwise assigning FALSE.
Further, the step of performing the breaking control on the drop-out breaking device according to the ductility of the threshold mode specifically includes:
setting a positive integer as an extension interval to be KTms, ktms epsilon [1, KOMN ], wherein KOMN is the frequency of reading a current value in one minute;
if the threshold mode values obtained at the current moment and the previous KTms moments are TRUE, the switching-on and switching-off operation is allowed to occur, namely the drop-off switching-off and switching-off circuit is allowed to be switched on and off; otherwise, the breaking operation is not allowed to occur, namely the falling type breaking of the falling breaking circuit is not allowed to occur.
The embodiment of the application also provides a drop-out breaking device control system, wherein the drop-out breaking device comprises a data acquisition device and communication equipment, the data acquisition device comprises a temperature sensor and a current transformer, and the communication equipment is used for data communication;
the system comprises:
the data acquisition module is used for acquiring temperature data and current data acquired by the data acquisition unit and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
the threshold mode judging module is used for judging a threshold mode according to the overcurrent temperature increase characteristic;
and the breaking control module is used for controlling the breaking of the drop-out breaking device according to the ductility of the threshold mode.
The embodiment of the application also provides a drop-out breaking device control device, which comprises: the drop-out type switching device control method of the embodiment is realized when the processor executes the computer program.
Embodiments of the present application have the following beneficial effects: the method has the advantages that the formation of electric arcs and the elimination of formed temperature fibrillation characteristics in an observation period quantify the error of overcurrent judgment of circuits in the device, the misjudgment risk of the circuit breaker on overload, short circuit and other circuit abnormalities caused by continuous formed temperature changes after the continuous occurrence of the overcurrent phenomenon in a tolerance range is reduced, the accuracy and the accuracy of drop-out intelligent on-off control judgment in a power system are improved, practical operation significance is brought to reducing the loss and the waste of related components of the drop-out on-off device, the stability and the sustainability of the power system are enhanced and protected, and the misjudgment risk of overcurrent analysis is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for controlling a drop-out breaking device according to an embodiment of the present application.
Fig. 2 is a block diagram of a control system of a drop-out switchgear according to an embodiment of the present application.
Detailed Description
The detailed description of the drawings is intended as a description of the present embodiments of the application and is not intended to represent the only forms in which the present application may be practiced. It is to be understood that the same or equivalent functions may be accomplished by different embodiments that are intended to be encompassed within the scope of the application.
The embodiment of the application provides a control method of a drop-out type switching-off device, wherein a plurality of drop-out type switching-off devices with the same model exist in a power system, and the drop-out type switching-off device is any one of an air magnetic circuit breaker, an electronic air circuit breaker or a digital air circuit breaker; the drop-out switching-off device comprises a data acquisition device and communication equipment, wherein the data acquisition device comprises a temperature sensor and a current transformer, the communication equipment is equipment or a module based on a wireless local area network, cellular communication or Zigbee Internet of things, and the communication equipment is used for data communication.
Referring to fig. 1, the method of the present embodiment includes the following steps:
step S1, acquiring temperature data and current data acquired by the data acquisition unit, and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
specifically, the method for collecting data through the data collector and obtaining the over-current temperature increase characteristic comprises the following steps: the temperature sensor and the current transformer in the data acquisition device acquire data at the same execution frequency, and respectively acquire a temperature value and a current value at the same moment;
in one example, a time interval is set as a temperature increase search segment ETPZone, ETPZone e [60,120] minutes; curve fitting is carried out on temperature values corresponding to all time in the ETPZone before the current time through mean value filtering treatment, and average values in the obtained fitted curves are respectively recorded as first temperature values; identifying each sub-climbing section from the obtained fitting curve, wherein the sub-climbing section is a curve part between any minimum value and the first maximum value obtained by searching along time sequence in the fitting curve, and defining the sub-climbing section as a climbing section if the numerical range of the sub-climbing section contains a first temperature value; if the minimum value in the numerical range of the sub-climbing section is larger than the first temperature value, defining the sub-climbing section as a second-class climbing section; calculating the average value of a set formed by each type of climbing sections and recording the average value as a temperature increase threshold Sgtp;
taking the ratio of the difference value of the current value at the current moment and the current value at the previous moment and the difference value of the temperature value at the current moment and the temperature increase threshold value as an overcurrent temperature increase characteristic; alternatively, the above-mentioned method for calculating the over-current temperature increase characteristic may be replaced by a method for calculating the over-current temperature increase characteristic SOEv according to the temperature value, the temperature increase threshold value, and the current value as follows:
；
wherein Crcv and Crcv 'respectively represent current values corresponding to the current calculation time and the previous time, exp () is an exponential function with a natural constant e as a base, and Crtp' respectively represent temperature values corresponding to the current calculation time and the previous time.
The sensitivity of identifying the relative dissimilarity of the temperature surge region can be improved by reflecting the relative dissimilarity of the current temperature value in the temperature surge search section to the current measurement in the circuit through the current temperature surge characteristic.
Step S2, judging a threshold mode according to the overcurrent temperature increase characteristic;
in one example, a time interval is set as a temperature increase search segment ETPZone, ETPZone e [60,120] minutes; in the current temperature increase search section, the average value of the obtained overcurrent temperature increase characteristics of each second-class climbing section is recorded as a first threshold value, and any moment meeting the condition that the overcurrent temperature increase characteristics are larger than the first threshold value is defined as a first-class threshold value point;
if the next moment of the first class of threshold points is not the first class of threshold points, defining the first class of threshold points as the second class of threshold points, traversing all the moments in reverse time sequence from the first class of threshold points until the traversed moments do not belong to the first class of threshold points, forming a set of traversed moments as abnormal events corresponding to the second class of threshold points, marking the quantity of the moments contained in the abnormal events as Dur, and marking the maximum value of the overcurrent temperature increase characteristic at each moment of the abnormal events as MS;
recording the ratio of the maximum value to the minimum value in the current values at each moment under the abnormal event as an overflow weight ORWt, and calculating to obtain an abnormal efficiency state OHEff corresponding to the current moment:
；
wherein max { } is a maximum function, nERZ is the total number of abnormal events, j1 is an accumulated variable, lg () is a logarithmic function with 10 as a base, OVRtj1 and DSWtj1 respectively represent an overflow weight and a bit difference weight of the j1 st abnormal event searched in reverse time sequence from the current moment, wherein the bit difference weight mode is as follows:
；
wherein p is any positive real number, and DsPvj1 is the time difference between the class II threshold point corresponding to the j1 th abnormal event and the current moment; and (3) in the temperature increase search section, the average value of the abnormal effectiveness states corresponding to all the moments is an effectiveness state level, if the abnormal effectiveness state at the current moment is larger than the effectiveness state level, the threshold mode is assigned TRUE, and otherwise, the threshold mode is assigned FALSE.
In another example, a time interval is set as a temperature increase search segment ETPZone, ETPZone e [60,120] minutes; in the current temperature increase search section, taking the sequence formed by the obtained over-current temperature increase characteristics as a flow sign monitoring sequence and taking the moment corresponding to each maximum value in the flow sign monitoring sequence as an over-current sign time point; defaulting the current moment to be an overcurrent sign time point and defining the current moment to be the current overcurrent sign time point; screening the overcurrent sign section from the temperature increase search section according to the positioning of the overcurrent sign time point: the current value at any moment is differenced from the current value at the moment before the moment, the difference is recorded as a point current increment, and the moment when the current increment is smaller than a current increment threshold value is defined as an increment depression point;
calculating the median of each current increment in the temperature increment search section as a current increment threshold, and defining the moment meeting the two conditions as a uniform state time point if one moment is an increment depression point and the corresponding temperature value at the moment has a minimum value; taking a time period from any overcurrent sign time point to the first uniform time point obtained by searching in the reverse time direction as an overcurrent sign section, and specially defining the overcurrent sign section corresponding to the current overcurrent sign time point as the current overcurrent sign section; defining the intercept of the sign segment as the total number of moments in the overcurrent sign segment, and comparing the number of incremental depression points in the overcurrent sign segmentThe example is recorded as the depression frequency HRt, the average value of the over-current temperature increase characteristics at each time in the over-current characteristic section is calculated and recorded as the characteristic section order value；
The overcurrent abnormal pattern OHEff at the current moment is obtained through calculation according to the depression frequency and the sign Duan Jie value,
；
wherein i1 is the serial number of the overcurrent condition section, pv is the identifier of the current overcurrent condition section, NOZ is the number of the overcurrent condition sections in the temperature increase search section, and NOZ-1 is because the current overcurrent condition section is ignored; HRTi1The depression frequency and sign Duan Jie value respectively representing the ith 1 th overcurrent sign segment traversed from the current moment in reverse time sequence, +.>The value of the sign segment which represents the current overcurrent sign segment, i2 is an accumulated variable corresponding to the accumulated operation;
the minimum value in the intercept of each flow sign segment is a standard intercept STDs, the overcurrent abnormal effect state at each moment is constructed into a sequence, and the average value of the previous STDs elements of the sequence is used as the current moment overcurrent abnormal effect state calibration value; taking the average value of the sequence as the level of the overcurrent abnormal state; and if the overcurrent abnormal state calibration value at the current moment is larger than the overcurrent abnormal state level, assigning TRUE to the threshold mode, otherwise assigning FALSE.
Step S3, the drop-out type breaking device is controlled to be broken according to the ductility of the threshold mode;
in one example, a positive integer is set to be KTms, KTms e [1, komin ], KTms is set to be 1 as a default value, komin is set to be the frequency of reading current values in one minute, if the values of threshold modes obtained at the current moment and the previous KTms moment are all TRUE, the open operation is defined to be allowed to occur, namely the drop-off operation is allowed to be started, and the drop-off circuit is allowed to be opened; otherwise, the open operation is defined to not be allowed to happen, namely the drop-out open drop-off circuit is temporarily not allowed to happen.
The embodiment of the application also provides a drop-out breaking device control system, wherein the drop-out breaking device comprises a data acquisition device and communication equipment, the data acquisition device comprises a temperature sensor and a current transformer, and the communication equipment is used for data communication;
referring to fig. 2, the system may be used to implement the method of the above embodiment, including:
the data acquisition module is used for acquiring temperature data and current data acquired by the data acquisition unit and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
the threshold mode judging module is used for judging a threshold mode according to the overcurrent temperature increase characteristic;
and the breaking control module is used for controlling the breaking of the drop-out breaking device according to the ductility of the threshold mode.
The embodiment of the application also provides a drop-out breaking device control device, which comprises: the drop-out switchgear control method comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, wherein the steps of the drop-out switchgear control method described in the embodiment are executed by the processor when the computer program is executed by the processor.
In particular, the processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), field-programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general processor can be a microprocessor or any conventional processor, and the processor is a control center of the drop-out intelligent cut-off control system operation system facing the power system protection, and various interfaces and lines are used for connecting various parts of the whole drop-out intelligent cut-off control system operation system facing the power system protection.
The memory can be used for storing the computer program and/or the module, and the processor realizes various functions of the drop-out intelligent switching control system facing the protection of the power system by running or executing the computer program and/or the module stored in the memory and calling data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. The control method of the drop-out breaking device is characterized in that the drop-out breaking device comprises a data acquisition device and communication equipment, wherein the data acquisition device comprises a temperature sensor and a current transformer, and the communication equipment is used for data communication;
the method comprises the following steps:
acquiring temperature data and current data acquired by the data acquisition unit, and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
judging a threshold mode according to the overcurrent temperature increase characteristic;
and carrying out breaking control on the drop-out breaking device according to the ductility of the threshold mode.
2. The method according to claim 1, wherein the obtaining the current temperature increase characteristic of the drop-out breaking device according to the temperature data and the current data specifically comprises:
the ratio of the difference value of the current value at the current moment and the current value at the previous moment to the difference value of the temperature value at the current moment and the temperature increase threshold value is used as the overcurrent temperature increase characteristic.
3. The method according to claim 1, wherein the flow temperature increase characteristic of the drop-out breaking device is obtained according to the temperature data and the current data, and the flow temperature increase characteristic is specifically expressed as follows:
；
wherein Crcv and Crcv 'respectively represent current values corresponding to the current calculation time and the previous time, exp () is an exponential function with a natural constant e as a base, crtp and Crtp' respectively represent temperature values corresponding to the current calculation time and the previous time, and Sgtp is a temperature increase threshold.
4. A method according to claim 2 or 3, characterized in that the temperature increase threshold is obtained according to the following manner:
setting a time interval as a temperature increase search section ETPZone, ETPZone E [60,120] minutes;
curve fitting is carried out on temperature values corresponding to all time in the ETPZone before the current time through mean value filtering treatment, and average values in the obtained fitted curves are respectively recorded as first temperature values;
identifying each sub-climbing section from the obtained fitting curve, wherein the sub-climbing section is a curve part from any minimum value to the first maximum value obtained by searching along time sequence in the fitting curve; defining the sub-climbing section as a type of climbing section if the numerical range of the sub-climbing section contains a first temperature value, and defining the sub-climbing section as a type of climbing section if the minimum value of the sub-climbing section in the numerical range of the sub-climbing section is larger than the first temperature value;
the average value of the set of each type of climbing section is calculated and is recorded as a temperature increase threshold Sgtp.
5. The method according to claim 4, wherein the determining a threshold mode according to the over-current temperature increase characteristic specifically comprises:
in the current temperature increase search section, the average value of the obtained overcurrent temperature increase characteristics of each second-class climbing section is recorded as a first threshold value, and any moment meeting the condition that the overcurrent temperature increase characteristics are larger than the first threshold value is defined as a first-class threshold value point; if the next moment of the class of threshold points is not the class of threshold points, defining the class of threshold points as the class of threshold points, traversing all the moments in reverse time sequence from the class of threshold points until the traversed moment does not belong to the class of threshold points, and forming a set of traversed moments as an abnormal event corresponding to the class of threshold points;
recording the ratio of the maximum value to the minimum value in the current values at each moment under the abnormal event as an overflow weight, and calculating a bit difference weight according to the time difference between the second class threshold points corresponding to the abnormal event and the current moment;
calculating to obtain an abnormal effect state corresponding to the current moment according to the overflow weight and the potential difference weight, and marking an average value of the abnormal effect states corresponding to all moments in the temperature increase search section as an effect state level;
if the abnormal state at the current moment is greater than the state level, the TRUE is assigned to the threshold mode, otherwise, the TRUE is assigned to FALSE.
6. The method according to claim 4, wherein the determining a threshold mode according to the over-current temperature increase characteristic specifically comprises:
setting a time interval as a temperature increase search section ETPZone, ETPZone E [60,120] minutes;
in the current temperature increase search section, taking the sequence formed by the obtained over-current temperature increase characteristics as a flow sign monitoring sequence and taking the moment corresponding to each maximum value in the flow sign monitoring sequence as an over-current sign time point;
screening an overcurrent sign section from a temperature increase search section according to the positioning of the overcurrent sign time point, making a difference between a current value at any moment and a current value at the previous moment and marking the difference as a point current increment, and defining a moment when the current increment is smaller than a current increment threshold value as an increment depression point; the method comprises the steps of calculating the median of each current increment in a temperature increment search section as a current increment threshold;
if one moment is an increment depression point and the corresponding temperature value of the moment has a minimum value, defining the moment meeting the two conditions as a homogeneous moment;
taking a time period from any overcurrent sign time point to the first uniform time point obtained by searching in the reverse time direction as an overcurrent sign section, recording the quantity proportion of increment depression points in the overcurrent sign section as depression point frequency, calculating the average value of overcurrent temperature increase characteristics at each time point in the overcurrent sign section and recording the average value as sign section order value, and calculating according to the depression point frequency and sign Duan Jie value to obtain the overcurrent abnormal effect state at the current time;
the minimum value in the intercept of each flow sign segment is a standard intercept STDs, the overcurrent abnormal state at each moment is constructed into a sequence, the average value of the previous STDs elements of the sequence is used as an overcurrent abnormal state calibration value at the current moment, and the average value of the sequence is used as the overcurrent abnormal state level;
and if the overcurrent abnormal state calibration value at the current moment is larger than the overcurrent abnormal state level, assigning TRUE to the threshold mode, otherwise assigning FALSE.
7. The method according to claim 1, wherein the step-out control of the drop-out breaking device according to the ductility of the threshold mode, in particular comprises:
setting a positive integer as an extension interval to be KTms, ktms epsilon [1, KOMN ], wherein KOMN is the frequency of reading a current value in one minute;
if the threshold mode values obtained at the current moment and the previous KTms moments are TRUE, the switching-on and switching-off operation is allowed to occur, namely the drop-off switching-off and switching-off circuit is allowed to be switched on and off; otherwise, the breaking operation is not allowed to occur, namely the falling type breaking of the falling breaking circuit is not allowed to occur.
8. The drop-out breaking device control system is characterized in that the drop-out breaking device comprises a data acquisition device and communication equipment, wherein the data acquisition device comprises a temperature sensor and a current transformer, and the communication equipment is used for data communication;
the system comprises:
the data acquisition module is used for acquiring temperature data and current data acquired by the data acquisition unit and acquiring an overcurrent temperature increase characteristic according to the temperature data and the current data;
the threshold mode judging module is used for judging a threshold mode according to the overcurrent temperature increase characteristic;
and the breaking control module is used for controlling the breaking of the drop-out breaking device according to the ductility of the threshold mode.
9. A drop-out disconnect apparatus control apparatus comprising: a processor, a memory and a computer program stored in the memory and executable on the processor, the processor implementing the drop-out switchgear control method of any one of claims 1-7 when the computer program is executed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311749932.1A CN117713378A (en) | 2023-12-19 | 2023-12-19 | Control method, system and device for drop-out type breaking device |
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| CN202311749932.1A CN117713378A (en) | 2023-12-19 | 2023-12-19 | Control method, system and device for drop-out type breaking device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118040601A (en) * | 2024-04-11 | 2024-05-14 | 南京荣港电气技术有限公司 | Fall-off intelligent on-off control method and system based on power protection |
| CN118040601B (en) * | 2024-04-11 | 2024-07-09 | 南京荣港电气技术有限公司 | Fall-off intelligent on-off control method and system based on power protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118040601A (en) * | 2024-04-11 | 2024-05-14 | 南京荣港电气技术有限公司 | Fall-off intelligent on-off control method and system based on power protection |
| CN118040601B (en) * | 2024-04-11 | 2024-07-09 | 南京荣港电气技术有限公司 | Fall-off intelligent on-off control method and system based on power protection |
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