CN118472951A - Low-voltage self-healing type high-capacity voltage limiting system - Google Patents
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
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Abstract
The invention discloses a low-voltage self-healing type high-capacity voltage limiting system, which comprises an acquisition module, a data processing module, a control system, a low-voltage self-healing type high-capacity voltage limiting module and a data storage module. The low-voltage self-healing high-capacity voltage limiting system is used for screening collected data, forming a threshold data set based on historical data in a data storage module, matching and matching the initial data set with the threshold data set to generate corresponding processing results, and transmitting and forming a control instruction to a control system, so that when any one of a monitored current effective value and a voltage effective value exceeds a threshold value, the delay time is given for adjusting or tripping treatment, thus not only completing self-healing type voltage limiting control operation, but also automatically operating to protect electric equipment even if the control is not in a live state, and avoiding the problem of equipment damage caused by continuous overvoltage.
Description
Technical Field
The invention relates to the technical field of power grid systems, in particular to a low-voltage self-healing high-capacity voltage limiting system.
Background
Reference is made to the patent name: a low-voltage self-healing capacitor monitoring and protecting system (patent publication No. CN207396636U, patent publication No. 2018-05-22) comprises a main controller, a multifunctional ammeter, a current transformer, a first temperature sensor, a second temperature sensor, a relay output module, a liquid crystal touch display, a communication module and an upper computer; the main controller is respectively connected with the multifunctional ammeter, the current transformer, the first temperature sensor, the second temperature sensor, the relay output module and the liquid crystal touch display, and is connected with the upper computer through the communication module; the low-voltage self-healing capacitor monitoring and protecting system effectively knows the working state of the capacitor and improves the problem point in time; the low-voltage self-healing capacitor monitoring protection system acts for protection before various passive protection, so that the safety coefficient is greatly improved; the low-voltage self-healing capacitor monitors accident data and operation data records of a protection system for later analysis and research.
Based on the description of the above document, the existing 400V mains supply system can generate operation overvoltage with more than ten periods when power supply is switched, the overvoltage can cause damage to electric equipment, breakdown of insulation can be caused, voltage fluctuation of precise electric equipment can directly cause equipment shutdown, but the overvoltage level caused by power supply switching does not exceed relevant standard requirements, and corresponding treatment cannot be performed on the conditions at present.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a low-voltage self-healing high-capacity voltage limiting system, which solves the problems that the overvoltage level caused by the existing power supply switching does not exceed the relevant standard requirement, the electric equipment is easy to damage, and the current voltage limiting system cannot deal with the situation.
In order to achieve the above purpose, the invention is realized by the following technical scheme: a low pressure self-healing high capacity voltage limiting system comprising:
The acquisition module is used for acquiring line operation data connected with the equipment through various acquisition sensors and transmitting the data;
The data processing module is used for screening the acquired data, reserving the required data to form an initial data set, forming a threshold data set based on the historical data in the data storage module, matching the initial data set with the threshold data set to generate a corresponding processing result, and transmitting the corresponding processing result to the control system to form a control instruction;
the control system monitors the operation data and system parameters in real time, records the data and is used for completing the transmission of the data and the transmission of instructions;
the low-voltage self-healing high-capacity voltage limiting module adopts a six-column wiring principle structure, high-energy ZNO voltage limiting elements are respectively connected between a phase and between the phases and the opposite ground, and the operation of switching in or switching out is realized through a control instruction of a control system;
The data storage module is used for storing the collected data, the processed data and the instruction data of production control, and meanwhile, historical operation data is contained, and the data is embodied in a chart or character mode through the display panel.
Preferably, the data processing module is configured to perform screening on the collected data, where the screening operation is as follows:
A1, firstly, establishing a screening template according to data categories required in the subsequent processing and calculating process, taking the names of the data categories as row titles and taking time nodes according to the sequence as column titles;
A2, introducing the acquired data into a screening template, matching the acquired data with the data category names in the screening template, then matching the time nodes under the category names corresponding to the acquired data, and inputting the corresponding numerical data into the intersection of the rows and the columns of the time nodes under the category names corresponding to the screening template;
And A3, completing screening of the data according to the operation of A2, and reserving the screening templates with the numerical data to form an initial data set and marking the initial data set as J, wherein the data which is not adopted by the screening templates is filtered and deleted.
Preferably, the expression formed by the numerical value after the data matching between the collected data in the A2 and the screening template is:
；
Wherein L represents numerical data filled in the intersection of the rows and the columns of the time node under the corresponding category name of the screening template, M represents category name content in the acquired data, M represents category name content in the screening template, M N M represents category name content identical to the category name content in the matching of the acquired data and the screening template, N represents the time node of the corresponding category name content in the acquired data, N represents the time node of the corresponding category name content in the screening template, and N represents the time node data of the same category name content in the matching of the acquired data and the screening template.
Preferably, the forming operation of the threshold data set in the data processing module is as follows:
B1, forming a graph according to historical data from the initial condition to the overvoltage condition, wherein the graph is positioned on a transverse coordinate axis as time and on a longitudinal coordinate axis as a voltage value;
B2, setting the buffer time as T1, starting from a time node generated by overvoltage, moving forward by T1 time at the time corresponding to the overvoltage time node on the graph to obtain a threshold time node, and marking the voltage threshold at the threshold time node as U1;
And B3, synchronously calculating a current threshold I1 positioned at the same time node based on the voltage threshold at the time, and summarizing the threshold data to form a threshold data set.
Preferably, the data processing module performs matching pairing operation on the initial data set through the threshold data set:
C1, matching the line topic content characteristics in the initial data set with the category names of the threshold data set, and comparing the numerical data corresponding to the same parts of the content characteristics;
c2, comparing judgment conditions for controlling the on-off of the low-voltage self-healing high-capacity voltage limiting module in sequence, wherein the judgment conditions respectively comprise a current effective value, a voltage effective value and an energy value consumed on the 1s time module;
And C3, judging whether the disconnection operation of the low-voltage self-healing high-capacity voltage limiting module is realized or not after comparing the judging conditions in the C2 with the corresponding data in the threshold data set.
Preferably, the operation of comparing the judgment condition in C3 with the effective voltage value in the threshold data set is as follows:
c3a1, summarizing the collected voltage instantaneous values in each period, and marking as ；
C3a2, and calculating the effective value of the voltage:
；
Wherein U2 is a voltage effective value, U is a voltage instantaneous value, and U n is a voltage instantaneous value of an nth acquisition point;
c3a3, comparing the voltage effective value U2 with a voltage threshold value U1, when U2 is more than U1, namely triggering a delay protection tripping command, generating delay time and marking as t1, namely starting calculation of the delay protection tripping command, namely marking as t2 when t2 is more than t1, generating a protection tripping action command when the voltage effective value U2 does not fall below a set threshold value U1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the voltage effective value U2 falls below the set threshold value U1.
Preferably, the comparison operation between the judging condition in C3 and the current effective value in the threshold data set is as follows:
c3b1, summarizing the collected current instantaneous values in each period, and marking as ；
C3b2, and calculating the effective value of the current:
；
Wherein I2 is a current effective value, I is a current instantaneous value, and I n represents a current instantaneous value of the nth acquisition point;
c3b3, comparing the current effective value I2 with a current threshold value I1, when I2 is more than I1, namely triggering a delay protection tripping command, generating delay time and marking as t3, namely starting calculation of the delay protection tripping command, namely marking as t4, when t4 is more than t3, generating a protection tripping action command when the current effective value I2 does not fall below a set current threshold value I1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the current effective value I2 falls below the set current threshold value I1.
Preferably, the comparison operation between the judgment condition in C3 and the energy value consumed on the 1s time module in the threshold data set is as follows:
c3c1, firstly calculating active power and marking as P:
；
c3c2, then calculates the consumed energy value for one cycle: e=p×t2=0.02p, where e is the consumption energy value and T2 represents the time of one cycle is 0.02s;
The energy consumed in the 1s time is the sum of the energy consumed for 50 consecutive periods: ；
c3c3, after each period value is obtained, updating an array of energy E once, removing the initial E 1, sequentially translating the data, and supplementing the last bit which is vacated with the latest acquired and calculated data, so as to reciprocally update the energy E consumed on the last 1s time energy-limiting module in real time;
And c3c4, comparing the consumed energy E with F when the calculated consumed energy threshold value is F, and directly generating a protection tripping action instruction when E is more than F.
Preferably, the control system adopts a main frequency ARM processor and a 16-bit high-speed ADC analog-to-digital conversion chip, and transmits a protection tripping action instruction to corresponding equipment for instruction execution after receiving a comparison result, or transmits an exit instruction of the low-voltage self-healing high-capacity voltage limiting module to control the exit operation.
Preferably, the high-energy ZNO voltage limiting element becomes infinite resistance when the effective voltage value is lower than the voltage threshold value, becomes infinite resistance when the effective voltage value is higher than the voltage threshold value, and limits the voltage amplitude to be below the threshold value in a mode that a larger current flows through the high-energy ZNO voltage limiting element when the effective voltage value is higher than the voltage threshold value.
The invention provides a low-voltage self-healing high-capacity voltage limiting system. Compared with the prior art, the method has the following beneficial effects:
(1) The low-voltage self-healing high-capacity voltage limiting system is used for screening collected data, reserving needed data to form an initial data set, forming a threshold data set based on historical data in a data storage module, matching the initial data set with the threshold data set to generate a corresponding processing result, and transmitting a control command to a control system so as to provide delay time for adjusting or tripping when any one of a monitored current effective value and a voltage effective value exceeds a threshold value, thereby not only completing self-healing type voltage limiting control operation, but also automatically operating to protect electric equipment even if the control is not completed, and avoiding the problem of equipment damage caused by continuous overvoltage.
(2) According to the low-voltage self-healing high-capacity voltage limiting system, collected data are introduced into the screening template through screening operation, the collected data are matched with the data category names in the screening template, the time nodes under the category names corresponding to the collected data are matched, the corresponding numerical data are input to the intersections of the rows and the columns of the time nodes under the category names corresponding to the screening template, so that not only can the effective required data be obtained, but also the numerical value at the intersections of the time nodes corresponding to the category names can be expressed clearly, the accuracy in the process of using the data is more accurate later, and meanwhile, the processing efficiency is improved due to the reduction of the data.
(3) The low-voltage self-healing high-capacity voltage limiting system sequentially compares the current effective value, the voltage effective value and the energy value consumed on the 1s time module with corresponding threshold data by matching the content characteristics of the line header in the initial data set with the class names of the threshold data set, so that corresponding control instructions are produced for operation, and therefore the problem data are solved or timely trip protection after the problem data are not solved is achieved, damage to electric equipment is reduced, prediction and operation can be carried out before the related standard requirements, and the use safety is improved.
Drawings
FIG. 1 is a schematic block diagram of a pressure limiting system of the present invention;
FIG. 2 is a flow chart of data matching of the data processing module of the present invention;
FIG. 3 is a logic decision diagram of threshold alignment according to the present invention;
fig. 4 is a schematic diagram of a six-column wiring principle of the low-voltage self-healing high-capacity voltage limiting module of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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. 1-4, the present invention provides two technical schemes:
An embodiment one, a low-voltage self-healing high-capacity voltage limiting system, includes:
The acquisition module is used for acquiring line operation data connected with the equipment through various acquisition sensors and transmitting the data;
The data processing module is used for screening the acquired data, reserving the required data to form an initial data set, forming a threshold data set based on the historical data in the data storage module, matching the initial data set with the threshold data set to generate a corresponding processing result, and transmitting the corresponding processing result to the control system to form a control instruction;
the control system monitors the operation data and system parameters in real time, records the data and is used for completing the transmission of the data and the transmission of instructions;
the low-voltage self-healing high-capacity voltage limiting module adopts a six-column wiring principle structure, high-energy ZNO voltage limiting elements are respectively connected between a phase and between the phases and the opposite ground, and the operation of switching in or switching out is realized through a control instruction of a control system;
The data storage module is used for storing the collected data, the processed data and the instruction data of production control, and meanwhile, historical operation data is contained, and the data is embodied in a chart or character mode through the display panel.
The acquisition module is used for acquiring data through the ammeter and the voltmeter, the timer is also covered for node timing, the acquired data is used for carrying out data transmission operation through the communication transmission module, the data processing module, the control system and the low-voltage self-healing high-capacity voltage limiting module are used for carrying out signal transmission operation, the low-voltage self-healing high-capacity voltage limiting module is connected or disconnected, or the low-voltage self-healing high-capacity voltage limiting module is regulated to a certain delay time for buffering, trip protection processing is carried out when the electric equipment is finally not processed, and protection operation on electric equipment is completed.
The low-voltage self-healing high-capacity voltage limiting system is used for screening collected data, retaining needed data to form an initial data set, forming a threshold data set based on historical data in the data storage module, matching the initial data set with the threshold data set to generate corresponding processing results, and transmitting a control command to the control system to form a control command, so that when any one of a monitored current effective value and a voltage effective value exceeds a threshold value, the delay time is given to carry out adjustment processing or tripping processing, the self-healing voltage limiting control operation is completed, and electric equipment can be automatically operated to be protected even if the control is not in a holding state, so that the problem of equipment damage caused by continuous overvoltage is avoided.
In the embodiment of the invention, the data processing module is used for screening the acquired data, and the operation is as follows:
A1, firstly, establishing a screening template according to data categories required in the subsequent processing and calculating process, taking the names of the data categories as row titles and taking time nodes according to the sequence as column titles;
A2, introducing the acquired data into a screening template, matching the acquired data with the data category names in the screening template, then matching the time nodes under the category names corresponding to the acquired data, and inputting the corresponding numerical data into the intersection of the rows and the columns of the time nodes under the category names corresponding to the screening template;
And A3, completing screening of the data according to the operation of A2, and reserving the screening templates with the numerical data to form an initial data set and marking the initial data set as J, wherein the data which is not adopted by the screening templates is filtered and deleted.
The collected data is introduced into the screening template through screening operation, the collected data is matched with the data category names in the screening template, then the time nodes under the category names corresponding to the collected data are matched, the corresponding numerical data is input to the intersections of the rows and the columns of the time nodes under the category names corresponding to the screening template, so that not only can the effective required data be obtained, but also the numerical value at the intersections of the time nodes corresponding to the category names can be expressed clearly, the accuracy in the process of using the data later is more accurate, and meanwhile, the processing efficiency is improved due to the reduction of the data.
In the embodiment of the invention, the expression formed by the numerical value after the data matching of the acquired data in A2 and the screening template is as follows:
；
Wherein L represents numerical data filled in the intersection of the rows and the columns of the time node under the corresponding category name of the screening template, M represents category name content in the acquired data, M represents category name content in the screening template, M N M represents category name content identical to the category name content in the matching of the acquired data and the screening template, N represents the time node of the corresponding category name content in the acquired data, N represents the time node of the corresponding category name content in the screening template, and N represents the time node data of the same category name content in the matching of the acquired data and the screening template.
After the conditions are met, the generated corresponding numerical data is input to the intersection of the row and the column of the time node under the category name corresponding to the screening template, namely the matching completion operation of one data is completed, and the data is pushed until all the data are matched.
In the embodiment of the invention, the forming operation of the threshold data set in the data processing module is as follows:
B1, forming a graph according to historical data from the initial condition to the overvoltage condition, wherein the graph is positioned on a transverse coordinate axis as time and on a longitudinal coordinate axis as a voltage value;
B2, setting the buffer time as T1, starting from a time node generated by overvoltage, moving forward by T1 time at the time corresponding to the overvoltage time node on the graph to obtain a threshold time node, and marking the voltage threshold at the threshold time node as U1;
And B3, synchronously calculating a current threshold I1 positioned at the same time node based on the voltage threshold at the time, and summarizing the threshold data to form a threshold data set.
In the embodiment of the invention, the data processing module performs matching pairing operation on the initial data set through the threshold data set:
C1, matching the line topic content characteristics in the initial data set with the category names of the threshold data set, and comparing the numerical data corresponding to the same parts of the content characteristics;
c2, comparing judgment conditions for controlling the on-off of the low-voltage self-healing high-capacity voltage limiting module in sequence, wherein the judgment conditions respectively comprise a current effective value, a voltage effective value and an energy value consumed on the 1s time module;
And C3, judging whether the disconnection operation of the low-voltage self-healing high-capacity voltage limiting module is realized or not after comparing the judging conditions in the C2 with the corresponding data in the threshold data set.
In the embodiment of the invention, the comparison operation of the judging condition in C3 and the effective voltage value in the threshold data set is as follows:
c3a1, summarizing the collected voltage instantaneous values in each period, and marking as ；
C3a2, and calculating the effective value of the voltage:
；
Wherein U2 is a voltage effective value, U is a voltage instantaneous value, and U n is a voltage instantaneous value of an nth acquisition point;
c3a3, comparing the voltage effective value U2 with a voltage threshold value U1, when U2 is more than U1, namely triggering a delay protection tripping command, generating delay time and marking as t1, namely starting calculation of the delay protection tripping command, namely marking as t2 when t2 is more than t1, generating a protection tripping action command when the voltage effective value U2 does not fall below a set threshold value U1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the voltage effective value U2 falls below the set threshold value U1.
In the embodiment of the invention, the comparison operation of the judging condition in C3 and the effective value of the current in the threshold data set is as follows:
c3b1, summarizing the collected current instantaneous values in each period, and marking as ；
C3b2, and calculating the effective value of the current:
；
Wherein I2 is a current effective value, I is a current instantaneous value, and I n represents a current instantaneous value of the nth acquisition point;
c3b3, comparing the current effective value I2 with a current threshold value I1, when I2 is more than I1, namely triggering a delay protection tripping command, generating delay time and marking as t3, namely starting calculation of the delay protection tripping command, namely marking as t4, when t4 is more than t3, generating a protection tripping action command when the current effective value I2 does not fall below a set current threshold value I1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the current effective value I2 falls below the set current threshold value I1.
In the embodiment of the invention, the comparison operation of the judging condition in C3 and the energy value consumed on the 1s time module in the threshold data set is as follows:
c3c1, firstly calculating active power and marking as P:
；
c3c2, then calculates the consumed energy value for one cycle: e=p×t2=0.02p, where e is the consumption energy value and T2 represents the time of one cycle is 0.02s;
The energy consumed in the 1s time is the sum of the energy consumed for 50 consecutive periods: ；
c3c3, after each period value is obtained, updating an array of energy E once, removing the initial E 1, sequentially translating the data, and supplementing the last bit which is vacated with the latest acquired and calculated data, so as to reciprocally update the energy E consumed on the last 1s time energy-limiting module in real time;
And c3c4, comparing the consumed energy E with F when the calculated consumed energy threshold value is F, and directly generating a protection tripping action instruction when E is more than F.
The method comprises the steps of comparing a current effective value, a voltage effective value and an energy value consumed on a 1s time module with corresponding threshold data in sequence by matching the line topic content characteristics in an initial data set with the class names of the threshold data set, so as to produce corresponding control instructions for operation, thereby achieving the purpose of solving problem data or timely tripping protection after failing to solve the problem data, reducing damage to electric equipment, predicting and operating before the requirements of related standards, and improving the use safety.
In the embodiment of the invention, the control system adopts a main frequency ARM processor and a 16-bit high-speed ADC analog-to-digital conversion chip, and transmits a protection tripping action instruction to corresponding equipment for instruction execution after receiving a comparison result, or transmits an exit instruction of the low-voltage self-healing high-capacity voltage limiting module to control the exit operation.
In the embodiment of the invention, the high-energy ZNO voltage limiting element becomes infinite resistance when the voltage effective value is lower than the voltage threshold value, becomes infinite resistance when the voltage effective value is higher than the voltage threshold value, and limits the voltage amplitude to be lower than the threshold value in a mode of flowing larger current when the voltage effective value is higher than the voltage threshold value.
The difference between the second embodiment and the first embodiment is that: the comparison experiment, the application of the same simulated electricity consumption area is completed through the existing voltage limiting system and the low-voltage self-healing high-capacity voltage limiting system, under the operation of electricity consumption switching based on the simulated electricity consumption area, whether the voltage limiting operation is performed on each electric equipment after the processing of the existing voltage limiting system and the low-voltage self-healing high-capacity voltage limiting system, whether the breaking protection operation is generated or not and whether the electric equipment is damaged or not are recorded through comparison, and the comparison result is shown in the table 1:
Table 1 data alignment table
In summary, after the control operation of the electric equipment is performed by the low-voltage self-healing high-capacity voltage limiting system, the probability of recovering to be normal after the voltage limiting operation of each electric equipment is higher, and the electric equipment which fails to recover is timely finished to break the gate protection operation, so that the situation of equipment damage is not generated, and the low-voltage self-healing high-capacity voltage limiting system has better application processing effect.
And all that is not described in detail in this specification is well known to those skilled in the art.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A low-pressure self-healing high-capacity pressure limiting system is characterized in that: comprising the following steps:
The acquisition module is used for acquiring line operation data connected with the equipment through various acquisition sensors and transmitting the data;
The data processing module is used for screening the acquired data, reserving the required data to form an initial data set, forming a threshold data set based on the historical data in the data storage module, matching the initial data set with the threshold data set to generate a corresponding processing result, and transmitting the corresponding processing result to the control system to form a control instruction;
the control system monitors the operation data and system parameters in real time, records the data and is used for completing the transmission of the data and the transmission of instructions;
the low-voltage self-healing high-capacity voltage limiting module adopts a six-column wiring principle structure, high-energy ZNO voltage limiting elements are respectively connected between a phase and between the phases and the opposite ground, and the operation of switching in or switching out is realized through a control instruction of a control system;
The data storage module is used for storing the collected data, the processed data and the instruction data of production control, and meanwhile, historical operation data is contained, and the data is embodied in a chart or character mode through the display panel.
2. The low-voltage self-healing high-capacity voltage limiting system according to claim 1, wherein: the data processing module is used for screening the collected data and comprises the following operations:
A1, firstly, establishing a screening template according to data categories required in the subsequent processing and calculating process, taking the names of the data categories as row titles and taking time nodes according to the sequence as column titles;
A2, introducing the acquired data into a screening template, matching the acquired data with the data category names in the screening template, then matching the time nodes under the category names corresponding to the acquired data, and inputting the corresponding numerical data into the intersection of the rows and the columns of the time nodes under the category names corresponding to the screening template;
And A3, completing screening of the data according to the operation of A2, and reserving the screening templates with the numerical data to form an initial data set and marking the initial data set as J, wherein the data which is not adopted by the screening templates is filtered and deleted.
3. The low-voltage self-healing high-capacity voltage limiting system according to claim 2, wherein: the expression formed by the numerical value after the data of the collection data in the A2 is matched with the screening template is as follows:
；
Wherein L represents numerical data filled in the intersection of the rows and the columns of the time node under the corresponding category name of the screening template, M represents category name content in the acquired data, M represents category name content in the screening template, M N M represents category name content identical to the category name content in the matching of the acquired data and the screening template, N represents the time node of the corresponding category name content in the acquired data, N represents the time node of the corresponding category name content in the screening template, and N represents the time node data of the same category name content in the matching of the acquired data and the screening template.
4. The low-voltage self-healing high-capacity voltage limiting system according to claim 1, wherein: the forming operation of the threshold data set in the data processing module is as follows:
B1, forming a graph according to historical data from the initial condition to the overvoltage condition, wherein the graph is positioned on a transverse coordinate axis as time and on a longitudinal coordinate axis as a voltage value;
B2, setting the buffer time as T1, starting from a time node generated by overvoltage, moving forward by T1 time at the time corresponding to the overvoltage time node on the graph to obtain a threshold time node, and marking the voltage threshold at the threshold time node as U1;
And B3, synchronously calculating a current threshold I1 positioned at the same time node based on the voltage threshold at the time, and summarizing the threshold data to form a threshold data set.
5. The low-voltage self-healing high-capacity voltage limiting system according to claim 4, wherein: the data processing module performs matching pairing operation on the initial data set through the threshold data set:
C1, matching the line topic content characteristics in the initial data set with the category names of the threshold data set, and comparing the numerical data corresponding to the same parts of the content characteristics;
c2, comparing judgment conditions for controlling the on-off of the low-voltage self-healing high-capacity voltage limiting module in sequence, wherein the judgment conditions respectively comprise a current effective value, a voltage effective value and an energy value consumed on the 1s time module;
And C3, judging whether the disconnection operation of the low-voltage self-healing high-capacity voltage limiting module is realized or not after comparing the judging conditions in the C2 with the corresponding data in the threshold data set.
6. The low-voltage self-healing high-capacity voltage limiting system according to claim 5, wherein: and C3, the comparison operation of the judging condition and the effective voltage value in the threshold data set is as follows:
c3a1, summarizing the collected voltage instantaneous values in each period, and marking as ；
C3a2, and calculating the effective value of the voltage:
；
Wherein U2 is a voltage effective value, U is a voltage instantaneous value, and U n is a voltage instantaneous value of an nth acquisition point;
c3a3, comparing the voltage effective value U2 with a voltage threshold value U1, when U2 is more than U1, namely triggering a delay protection tripping command, generating delay time and marking as t1, namely starting calculation of the delay protection tripping command, namely marking as t2 when t2 is more than t1, generating a protection tripping action command when the voltage effective value U2 does not fall below a set threshold value U1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the voltage effective value U2 falls below the set threshold value U1.
7. The low-voltage self-healing high-capacity voltage limiting system according to claim 6, wherein: and C3, comparing the judging condition with the current effective value in the threshold data set to:
c3b1, summarizing the collected current instantaneous values in each period, and marking as ；
C3b2, and calculating the effective value of the current:
；
Wherein I2 is a current effective value, I is a current instantaneous value, and I n represents a current instantaneous value of the nth acquisition point;
c3b3, comparing the current effective value I2 with a current threshold value I1, when I2 is more than I1, namely triggering a delay protection tripping command, generating delay time and marking as t3, namely starting calculation of the delay protection tripping command, namely marking as t4, when t4 is more than t3, generating a protection tripping action command when the current effective value I2 does not fall below a set current threshold value I1, otherwise, generating an exit command of the low-voltage self-healing type high-capacity voltage limiting module when the current effective value I2 falls below the set current threshold value I1.
8. The low-voltage self-healing high-capacity voltage limiting system according to claim 7, wherein: and C3, comparing the judging condition with the energy value consumed on the 1s time module in the threshold data set to obtain the following operation:
c3c1, firstly calculating active power and marking as P:
；
c3c2, then calculates the consumed energy value for one cycle: e=p×t2=0.02p, where e is the consumption energy value and T2 represents the time of one cycle is 0.02s;
The energy consumed in the 1s time is the sum of the energy consumed for 50 consecutive periods: ；
c3c3, after each period value is obtained, updating an array of energy E once, removing the initial E 1, sequentially translating the data, and supplementing the last bit which is vacated with the latest acquired and calculated data, so as to reciprocally update the energy E consumed on the last 1s time energy-limiting module in real time;
And c3c4, comparing the consumed energy E with F when the calculated consumed energy threshold value is F, and directly generating a protection tripping action instruction when E is more than F.
9. The low-voltage self-healing high-capacity voltage limiting system according to claim 1, wherein: the control system adopts a main frequency ARM processor and a 16-bit high-speed ADC analog-to-digital conversion chip, and transmits a protection tripping action instruction to corresponding equipment for instruction execution after receiving a comparison result, or transmits an exit instruction of the low-voltage self-healing high-capacity voltage limiting module to control the exit operation.
10. The low-voltage self-healing high-capacity voltage limiting system according to claim 1, wherein: the high-energy ZNO voltage limiting element changes into infinite resistance when the voltage effective value is lower than the voltage threshold value, changes into infinite resistance when the voltage effective value is higher than the voltage threshold value, and limits the voltage amplitude to be under the threshold value in a mode that larger current flows through the high-energy ZNO voltage limiting element when the voltage effective value is higher than the voltage threshold value.
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