CN117394290A - Intelligent protection method and system for circuit breaker of multipath measurement data - Google Patents
Intelligent protection method and system for circuit breaker of multipath measurement data Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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Abstract
The invention provides a circuit breaker intelligent protection method and system for multipath measurement data, and relates to the technical field of circuit breaker protection, wherein the method comprises the following steps: acquiring a bus where a first circuit breaker is located, and acquiring an electronic element on the bus; setting a multi-path monitoring model; outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to the multi-path monitoring model; carrying out abnormal data identification and outputting an abnormal data set; outputting a first anomaly probability; according to the first abnormal probability, a protection instruction is sent to the first circuit breaker, protection switching is conducted on the first circuit breaker based on the protection instruction, the problem that in the prior art, most of protection is conducted on a circuit through the circuit breaker, recognition of self abnormality of the circuit breaker is lacking, and then the circuit breaker is poor in protection effect, the technical problem of affecting circuit safety is caused, safety protection of the circuit breaker is achieved, and the technical effect of improving circuit safety is achieved.
Description
Technical Field
The invention relates to the technical field of breaker protection, in particular to an intelligent breaker protection method and system for multipath measurement data.
Background
A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. The circuit breaker can be used for distributing electric energy, starting the asynchronous motor infrequently, protecting a power line, the motor and the like, and automatically cutting off the circuit when serious overload or short circuit, undervoltage and other faults occur, and the functions of the circuit breaker are equivalent to the combination of a fuse type switch, an over-under-heating relay and the like. During the generation, transportation and use of electricity, power distribution is an extremely important link, and faults such as overload, short circuit, undervoltage and the like are inevitably generated in the power distribution process, so that the circuit is protected through the circuit breaker, and the method has important significance for the safety protection of power transmission and distribution.
At present, the circuit is protected only through the circuit breaker in the prior art, and the technical problems that the circuit breaker is poor in protection effect and circuit safety is affected due to the fact that the circuit breaker is lack of recognition of self abnormality.
Disclosure of Invention
The invention provides an intelligent protection method and system for a circuit breaker of multipath measurement data, which are used for solving the technical problems that in the prior art, the circuit is protected only by the circuit breaker, the identification of the circuit breaker abnormality is lacking, and the protection effect on the circuit breaker is poor and the circuit safety is influenced.
According to a first aspect of the present invention, there is provided a circuit breaker intelligent protection method for multipath measurement data, comprising: acquiring a bus where a first circuit breaker is located, and acquiring an electronic element on the bus; setting a multi-path monitoring model, wherein the multi-path monitoring model comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises an element monitoring channel based on the electronic element, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker; outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model; carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set, and outputting an abnormal data set; calculating the probability of occurrence of the abnormality of the first circuit breaker according to the abnormality data, and outputting a first abnormality probability; and sending a protection instruction to the first circuit breaker according to the first abnormal probability, and performing protection switching on the first circuit breaker based on the protection instruction.
According to a second aspect of the present invention, there is provided a circuit breaker intelligent protection system for multipath measurement data, comprising: the electronic element acquisition module is used for acquiring a bus where the first circuit breaker is located and acquiring an electronic element on the bus; the monitoring model setting module is used for setting a multi-path monitoring model, wherein the multi-path monitoring model comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises an element monitoring channel based on the electronic element, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker; the monitoring data set output module is used for outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model; the abnormal data identification module is used for carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set and outputting an abnormal data set; the abnormal probability calculation module is used for calculating the probability of occurrence of the abnormality of the first circuit breaker according to the abnormal data and outputting a first abnormal probability; and the protection switching module is used for sending a protection instruction to the first circuit breaker according to the first abnormal probability and carrying out protection switching on the first circuit breaker based on the protection instruction.
According to the intelligent protection method for the circuit breaker of the multipath measurement data, the beneficial effects can be achieved as follows:
1. acquiring a bus where a first circuit breaker is located, acquiring an electronic element on the bus, setting a multi-path monitoring model, outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path monitoring channel in the multi-path monitoring model, carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set, outputting the abnormal data set, calculating the probability of occurrence of abnormality of the first circuit breaker according to the abnormal data, outputting the first abnormal probability, sending a protection instruction to the first circuit breaker according to the first abnormal probability, and carrying out protection switching on the first circuit breaker based on the protection instruction, so that the safety protection of the circuit breaker is realized, and the technical effect of improving the circuit safety is achieved.
2. According to the element abnormal data set, the line abnormal data set and the contact abnormal data set, current abnormal probability calculation is carried out, element-current abnormal probability, line-current abnormal probability and contact-current abnormal probability are respectively obtained, conditional probability calculation is carried out on the element-current abnormal probability and the line-current abnormal probability, first conditional probability is output, secondary conditional probability calculation is carried out on the first conditional probability and the contact-current abnormal probability, and the first abnormal probability is output, so that technical support is provided for subsequent circuit breaker protection, the safety of the circuit breaker is guaranteed, and the technical effect of circuit safety is further guaranteed.
3. The method comprises the steps of obtaining the current direction of a bus, arranging electronic elements on the bus according to the current direction, outputting a first element arrangement result, positioning an element abnormal data set according to the first element arrangement result, obtaining a first positioning sequence, generating a first adjustment coefficient according to the number of elements in the same current direction after the first positioning sequence, adjusting the first correlation coefficient according to the first adjustment coefficient, realizing the adjustment of the first correlation coefficient, achieving the aim of improving the accuracy of identifying the element abnormal-current change correlation, further improving the accuracy of the abnormal probability calculation result of the circuit breaker, and improving the technical effect of protecting the circuit breaker.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following brief description will be given of the drawings used in the description of the embodiments or the prior art, it being obvious that the drawings in the description below are only exemplary and that other drawings can be obtained from the drawings provided without the inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a circuit breaker intelligent protection method for multi-path measurement data according to an embodiment of the present invention;
FIG. 2 is a flow chart of outputting a first anomaly probability according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of protection switching of the first circuit breaker according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a circuit breaker intelligent protection system with multiple paths of measurement data according to an embodiment of the present invention.
Reference numerals illustrate: the electronic component acquisition module 11, the monitoring model setting module 12, the monitoring data set output module 13, the abnormal data identification module 14, the abnormal probability calculation module 15 and the protection switching module 16.
Detailed Description
Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which various details of the embodiments of the present invention are included to facilitate understanding, and are to be considered merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Example 1
Fig. 1 is a schematic diagram of a circuit breaker intelligent protection method for multi-path measurement data according to an embodiment of the present invention, where the method includes:
step S100: acquiring a bus where a first circuit breaker is located, and acquiring an electronic element on the bus;
specifically, a circuit breaker is a switching device capable of closing, carrying, and opening a current under normal circuit conditions, and also capable of closing, carrying, and opening a current under abnormal circuit conditions within a predetermined time. The circuit breakers are generally installed on the circuit loop, and the first circuit breaker refers to any circuit breaker installed on any circuit loop, for example, a circuit breaker installed in a kitchen circuit loop and a circuit breaker installed in a living room circuit loop in a household power circuit loop. The bus refers to a common path on which a plurality of devices are connected in parallel branches, in this embodiment, in the circuit where the circuit breaker is located, a plurality of electronic elements (such as a plurality of electrical appliances) are connected to the circuit where the circuit breaker is located in parallel branches, so as to obtain the electronic elements on the bus, including various electrical appliances, resistors, capacitors and other elements, where the first circuit breaker, the bus where the first circuit breaker is located, the electronic elements and the like can be confirmed and uploaded by a user according to the composition structure of the circuit to be protected by the circuit breaker.
Step S200: setting a multi-path monitoring model, wherein the multi-path monitoring model comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises an element monitoring channel based on the electronic element, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker;
step S300: outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model;
specifically, a multi-path monitoring model is set, wherein the multi-path monitoring model is used for monitoring real-time operation data of a first circuit breaker, a bus and an electronic component and comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises a component monitoring channel based on the electronic component, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker. The element monitoring channel is a channel for monitoring electronic elements and storing element monitoring data sets, specifically, sensors such as voltage, current, resistance and the like can be arranged on each electronic element in the element monitoring channel, and the electrical information of each electronic element is acquired and converted into an electrical signal or other information in a required form and stored. The line monitoring channel is used for monitoring the bus, and the power supply voltage and the power supply current of the bus can be monitored by arranging a voltage and current sensor at the power supply of the bus and converted into electric signals for storage. The contact monitoring channel is used for monitoring the contact of the first circuit breaker, the contact is used for realizing circuit connection or disconnection in the circuit breaker, when current flows through the contact, the temperature of the contact can change, when the temperature of the contact is too high, the contact is indicated that the contact is likely to be abnormal, therefore, the contact position can be provided with a patch type temperature sensor, the temperature of the contact can be monitored in real time through the patch type temperature sensor, and meanwhile, the current sensor can be arranged for monitoring the current of the contact.
The element monitoring data set is the monitoring data obtained through the element monitoring channel, the line monitoring data set is the monitoring data obtained through the bus monitoring channel, and the contact monitoring data set is the monitoring data obtained through the contact monitoring channel.
Step S400: carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set, and outputting an abnormal data set;
specifically, the element monitoring data set, the line monitoring data set and the contact monitoring data set are subjected to abnormal data identification, and an abnormal data set is output, wherein the abnormal data set comprises an element abnormal data set, a line abnormal data set and a contact abnormal data set. Specifically, by acquiring the historical record data of the electronic element, the bus power supply and the contact of the first circuit breaker, acquiring the data such as current, voltage and resistance when the electronic element normally operates as element normal operation data, acquiring the data such as power supply voltage and power supply current when the bus normally operates as bus normal operation data, and acquiring the data such as contact temperature and current when the first circuit breaker normally operates as contact normal operation data. And constructing an element abnormality recognition module by using the element normal operation data, and comparing and analyzing the element monitoring data set and the element normal operation data by using the element abnormality recognition module to obtain data which is different from or has larger difference with the element normal operation data as an element abnormality data set. And similarly, constructing a bus abnormal recognition module by using the bus normal operation data, and comparing the bus normal operation data with the line monitoring data set to obtain data which is different from or has larger difference with the bus normal operation data as a line abnormal data set. And finally, constructing a contact abnormality identification module according to the contact normal operation data, identifying the contact abnormality data, and obtaining a contact abnormality data set.
Step S500: calculating the probability of occurrence of the abnormality of the first circuit breaker according to the abnormality data, and outputting a first abnormality probability;
as shown in fig. 2, step S500 of the embodiment of the present invention further includes:
step S510: acquiring the abnormal data set, wherein the abnormal data set comprises an element abnormal data set, a line abnormal data set and a contact abnormal data set;
step S520: performing abnormality-current variation correlation identification with the element abnormality data set, the line abnormality data set, and the contact abnormality data set, and outputting a first correlation coefficient, a second correlation coefficient, and a third correlation coefficient;
step S530: and performing anomaly calculation according to the first correlation coefficient, the second correlation coefficient and the third phase relation number, and outputting the first anomaly probability.
The step S530 of the embodiment of the present invention further includes:
step S531: carrying out current anomaly probability calculation according to the element anomaly data set, the line anomaly data set and the contact anomaly data set to respectively obtain element-current anomaly probability, line-current anomaly probability and contact-current anomaly probability;
step S532: performing conditional probability calculation on the element-current abnormality probability and the line-current abnormality probability, and outputting a first conditional probability;
step S533: and carrying out secondary conditional probability calculation on the first conditional probability and the contact-current abnormality probability, and outputting the first abnormality probability.
Specifically, the probability of occurrence of the abnormality of the first circuit breaker is calculated according to the abnormality data, and a first abnormality probability is output, wherein the first abnormality probability characterizes the possibility of occurrence of the abnormality of the first circuit breaker, such as the possibility of failure of the circuit breaker, and the specific process is as follows:
the abnormal data set is obtained, wherein the abnormal data set comprises an element abnormal data set, a line abnormal data set and a contact abnormal data set, the element abnormal data set, the line abnormal data set and the contact abnormal data set are used for carrying out abnormal-current change correlation identification, a first correlation coefficient, a second correlation coefficient and a third correlation coefficient are output, the first correlation coefficient represents the correlation degree of abnormal current of the electronic element fault and the circuit breaker, the second correlation coefficient represents the correlation degree of abnormal current of the bus power supply and the circuit breaker, and the third correlation coefficient represents the correlation degree of abnormal current of the contact temperature and the circuit breaker. For example, the element anomaly data set, the line anomaly data set and the contact anomaly data set may be identified by gray correlation analysis, so as to obtain corresponding first correlation coefficient, second correlation coefficient and third correlation coefficient, where the correlation analysis is a common technical means for those skilled in the art, and therefore, the method is not performed here.
Further performing anomaly calculation according to the first correlation coefficient, the second correlation coefficient and the third phase relation number, and outputting the first anomaly probability, wherein the specific process is as follows:
specifically, the first correlation coefficient, the second correlation coefficient and the third correlation coefficient may be used to represent weights occupied by an electronic component abnormality, a bus line abnormality, and a contact temperature abnormality for a circuit breaker fault, respectively, and further, according to the component abnormality data set, the line abnormality data set, and the contact abnormality data set, current abnormality probability calculation is performed, and component-current abnormality probability, line-current abnormality probability, and contact-current abnormality probability are obtained, respectively, specifically, according to the component abnormality data set, the line abnormality data set, and the contact abnormality data set, total abnormality data amounts are counted, and then, component abnormality occurrence times, line abnormality occurrence times, and contact abnormality occurrence times of component abnormality data are counted, and the ratio of the component abnormality occurrence times, the line abnormality occurrence times, and the total abnormality data amounts is calculated, as the component-current abnormality probability, the line-current abnormality probability, and the contact-current abnormality probability, respectively.
Performing conditional probability calculation on the element-current abnormality probability and the line-current abnormality probability, and outputting a first conditional probability, wherein the conditional probability refers to the probability that an event A occurs under the condition that an event B occurs, and the first conditional probability is expressed as:in short, the ratio of the probability of occurrence of an abnormality of an electronic component and a bus line to the probability of occurrence of a fault of the bus line is calculated, when the conditional probability is calculated, the probability of occurrence of an independent event of the electronic component, the bus line and a breaker contact must be calculated first, in practice, some abnormalities may have contingencies, which may result in inaccuracy of the calculated component-current abnormality probability, line-current abnormality probability and contact-current abnormality probability, so that the component-current abnormality probability, line-current abnormality probability and contact-current abnormality probability are weighted by the first correlation coefficient, the second correlation coefficient and the third correlation coefficient, respectively, in short, the first correlation coefficient is multiplied by the component-current abnormality probability, and the obtained result is the component independent event probability of occurrence of an abnormality of the component, namelyAnd so on, obtaining the line independent event probability of line abnormality, namely the element independent event probability of contact abnormality、，Thereby can obtain。
And further performing secondary conditional probability calculation on the first conditional probability and the contact-current abnormality probability, and outputting the first abnormality probability, wherein the first abnormality probability calculation formula is as follows:
；
wherein,the first probability of anomaly is characterized by,an event that characterizes the occurrence of an anomaly of the component,in order to characterize the occurrence of an abnormal event in the line,in order to ensure that the contact generates an abnormal event, n is the number of data sets of the abnormal data set;a conditional probability of line-current anomalies under the condition of element-current anomalies in the i-th set of anomaly data;in order to determine the probability of contact-current anomalies under the conditions of element-current anomalies and line-current anomalies in the ith set of anomaly data,，indicating the joint probability of element occurrence of an abnormal event, line occurrence of an abnormal event, and contact occurrence of an abnormal event,，thereby calculating and outputting the first anomaly probability.
And carrying out conditional probability analysis according to the abnormal data set, and outputting a first abnormal probability to provide technical support for subsequent circuit breaker protection, so that the safety of the circuit breaker is ensured, and the technical effect of circuit safety is further ensured.
Step S600: and sending a protection instruction to the first circuit breaker according to the first abnormal probability, and performing protection switching on the first circuit breaker based on the protection instruction.
As shown in fig. 3, step S600 of the embodiment of the present invention further includes:
step S610: collecting the bearing current of the first circuit breaker, and setting a bearing current upper limit target according to the bearing current;
step S620: acquiring a real-time change current corresponding to the first abnormal probability;
step S630: judging the first abnormal probability, and when the first abnormal probability is larger than a preset abnormal probability and the real-time change current is larger than or equal to the load current upper limit target, acquiring a first protection instruction, and controlling the circuit breaker to cut off according to the first protection instruction;
step S640: and when the first abnormal probability is smaller than the preset abnormal probability, acquiring a second protection instruction, and controlling the circuit breaker to turn on a circuit according to the second protection instruction.
Specifically, according to the first abnormal probability, a protection instruction is sent to the first circuit breaker, and protection switching is performed on the first circuit breaker based on the protection instruction, wherein the specific process is as follows:
the circuit breaker is a switching device capable of closing, carrying and opening current under normal loop conditions and capable of closing, carrying and opening current under abnormal loop conditions within a specified time, the carrying current is the current flowing through the first circuit breaker, the loadable current range of the first circuit breaker can be obtained as loadable current through a use manual of the first circuit breaker and uploaded, a carrying current upper limit target is set according to the carrying current, and the carrying current upper limit target is the maximum current value in the loadable current range of the first circuit breaker and represents the rated limit short-circuit breaking capacity of the circuit breaker. And acquiring the real-time change current corresponding to the first abnormal probability by arranging a current sensor on the first circuit breaker.
The method comprises the steps of setting preset abnormal probability, wherein the preset abnormal probability is set by a person skilled in the art, and by way of example, historical data of the first circuit breaker with the same type of circuit breaker can be collected, the obtained historical abnormal probability is calculated, and the minimum historical abnormal probability corresponding to the occurrence time of the circuit breaker is obtained as the preset abnormal probability according to the historical fault condition of the circuit breaker corresponding to the historical abnormal probability. Further, by judging the first abnormal probability, when the first abnormal probability is greater than a preset abnormal probability and the real-time change current is greater than or equal to the load current upper limit target, a first protection instruction is obtained, the first protection instruction is an instruction for controlling the first circuit breaker to cut off a circuit and conduct circuit protection, the circuit breaker is controlled to cut off the circuit according to the first protection instruction, the circuit breaker of the first circuit breaker is controlled to break according to the first protection instruction, the main contact bears load current, the auxiliary contact protects the main contact, and the arc contact bears arc burning when the current is cut off, so that the main contact is ensured not to be ablated by the arc and works stably for a long time. When the first abnormal probability is smaller than the preset abnormal probability, a second protection instruction is acquired, wherein the second protection instruction is an instruction for controlling the first circuit breaker to be communicated with a circuit, namely, at the moment, the circuit breaker is controlled to be communicated with the circuit according to the second protection instruction, namely, the first circuit breaker is closed, the arc contact is closed firstly, then the auxiliary contact is closed, and finally, the main contact is closed. Therefore, the technical effects of ensuring the safety of the circuit breaker and improving the safety of the circuit are achieved.
The embodiment of the invention further comprises a step S700:
step S710: acquiring a current direction of the bus, arranging electronic elements on the bus according to the current direction, and outputting a first element arrangement result;
step S720: positioning the element abnormal data set according to the first element arrangement result to obtain a first positioning sequence;
step S730: generating a first adjustment coefficient according to the number of elements in the same direction of the current after the first positioning sequence, and adjusting the first correlation coefficient according to the first adjustment coefficient.
Specifically, the current direction of the bus is the direction in which the power interface starts to travel along the components in the circuit, based on the current direction, the electronic components on the bus are sequentially collected from the power positive electrode of the bus according to the current direction, and are sequentially arranged, and the sequential arrangement result is the first component arrangement result. And positioning the element abnormal data set according to the first element arrangement result to obtain a first positioning sequence, namely extracting abnormal elements according to the element abnormal data set obtained in the previous step, and sequentially sequencing the abnormal elements according to the first element arrangement result to obtain the first positioning sequence. In the first element arrangement result, a plurality of normal electronic elements are arranged behind the first positioning sequence, the number of the plurality of normal electronic elements behind the first positioning sequence is counted to be used as the number of elements according to the arrangement sequence, the more the number of the elements is, the smaller the first adjustment coefficient is, the first adjustment coefficient can use the ratio of the number of the elements to the total number of the elements of the first element arrangement result as the first adjustment coefficient, the first adjustment coefficient is multiplied by the first correlation coefficient, and therefore adjustment of the first correlation coefficient is achieved, the accuracy of element abnormality-current change correlation identification is improved, the accuracy of the abnormal probability calculation result of the circuit breaker is improved, and the protection effect of the circuit breaker is improved.
The embodiment of the invention further includes step S800:
step S810: judging whether a second circuit breaker exists or not based on a bus where the first circuit breaker is located;
step S820: and if the second circuit breaker exists, transmitting the protection instruction to the second circuit breaker when the protection instruction of the first circuit breaker fails, and controlling the protection switching of the second circuit breaker.
In general, one circuit is provided with one circuit breaker, however, in order to improve the circuit security, a part of users may set a plurality of circuit breakers, the number and the installation position of the circuit breakers on the bus where the first circuit breaker is located may be obtained by the users and uploaded, and then whether a second circuit breaker is present or not is judged, the second circuit breaker generally refers to any circuit breaker except for the first circuit breaker on the bus where the first circuit breaker is located, if the second circuit breaker is present, when the protection instruction of the first circuit breaker fails, that is, the first circuit breaker is damaged, and when the current on-off control cannot be performed, the protection instruction is transmitted to the second circuit breaker for controlling the protection switching of the second circuit breaker, and the protection instruction includes a first protection instruction or a second protection instruction, and the protection switching mode is the same as that in the step S600, thereby achieving the protection effect of the circuit breaker in the lifting circuit, and further the effect of improving the circuit security.
Based on the analysis, the invention provides an intelligent protection method for the circuit breaker of multi-path measurement data, which has the following beneficial effects:
1. acquiring a bus where a first circuit breaker is located, acquiring an electronic element on the bus, setting a multi-path monitoring model, outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path monitoring channel in the multi-path monitoring model, carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set, outputting the abnormal data set, calculating the probability of occurrence of abnormality of the first circuit breaker according to the abnormal data, outputting the first abnormal probability, sending a protection instruction to the first circuit breaker according to the first abnormal probability, and carrying out protection switching on the first circuit breaker based on the protection instruction, so that the safety protection of the circuit breaker is realized, and the technical effect of improving the circuit safety is achieved.
2. According to the element abnormal data set, the line abnormal data set and the contact abnormal data set, current abnormal probability calculation is carried out, element-current abnormal probability, line-current abnormal probability and contact-current abnormal probability are respectively obtained, conditional probability calculation is carried out on the element-current abnormal probability and the line-current abnormal probability, first conditional probability is output, secondary conditional probability calculation is carried out on the first conditional probability and the contact-current abnormal probability, and the first abnormal probability is output, so that technical support is provided for subsequent circuit breaker protection, the safety of the circuit breaker is guaranteed, and the technical effect of circuit safety is further guaranteed.
3. The method comprises the steps of obtaining the current direction of a bus, arranging electronic elements on the bus according to the current direction, outputting a first element arrangement result, positioning an element abnormal data set according to the first element arrangement result, obtaining a first positioning sequence, generating a first adjustment coefficient according to the number of elements in the same current direction after the first positioning sequence, adjusting the first correlation coefficient according to the first adjustment coefficient, realizing the adjustment of the first correlation coefficient, achieving the aim of improving the accuracy of identifying the element abnormal-current change correlation, further improving the accuracy of the abnormal probability calculation result of the circuit breaker, and improving the technical effect of protecting the circuit breaker.
Example two
Based on the same inventive concept as the breaker intelligent protection method of the multi-path measurement data in the foregoing embodiment, as shown in fig. 4, the present invention further provides a breaker intelligent protection system of the multi-path measurement data, where the system includes:
the electronic element acquisition module 11 is used for acquiring a bus where the first circuit breaker is located and acquiring an electronic element on the bus;
a monitoring model setting module 12, where the monitoring model setting module 12 is configured to set a multi-path monitoring model, where the multi-path monitoring model includes a multi-path monitoring channel, the multi-path monitoring channel includes an element monitoring channel based on the electronic element, a line monitoring channel of the bus, and a contact monitoring channel of the first circuit breaker;
the monitoring data set output module 13 is used for outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model;
the abnormal data identification module 14 is used for identifying abnormal data of the element monitoring data set, the line monitoring data set and the contact monitoring data set, and outputting an abnormal data set;
an anomaly probability calculation module 15, where the anomaly probability calculation module 15 is configured to calculate, according to the anomaly data, a probability of occurrence of an anomaly of the first circuit breaker, and output a first anomaly probability;
and the protection switching module 16 is configured to send a protection instruction to the first circuit breaker according to the first abnormal probability, and perform protection switching on the first circuit breaker based on the protection instruction.
Further, the anomaly probability calculation module 15 is further configured to:
acquiring the abnormal data set, wherein the abnormal data set comprises an element abnormal data set, a line abnormal data set and a contact abnormal data set;
performing abnormality-current variation correlation identification with the element abnormality data set, the line abnormality data set, and the contact abnormality data set, and outputting a first correlation coefficient, a second correlation coefficient, and a third correlation coefficient;
and performing anomaly calculation according to the first correlation coefficient, the second correlation coefficient and the third phase relation number, and outputting the first anomaly probability.
Further, the anomaly probability calculation module 15 is further configured to:
carrying out current anomaly probability calculation according to the element anomaly data set, the line anomaly data set and the contact anomaly data set to respectively obtain element-current anomaly probability, line-current anomaly probability and contact-current anomaly probability;
performing conditional probability calculation on the element-current abnormality probability and the line-current abnormality probability, and outputting a first conditional probability;
and carrying out secondary conditional probability calculation on the first conditional probability and the contact-current abnormality probability, and outputting the first abnormality probability.
Further, the protection switching module 16 is further configured to:
collecting the bearing current of the first circuit breaker, and setting a bearing current upper limit target according to the bearing current;
acquiring a real-time change current corresponding to the first abnormal probability;
judging the first abnormal probability, and when the first abnormal probability is larger than a preset abnormal probability and the real-time change current is larger than or equal to the load current upper limit target, acquiring a first protection instruction, and controlling the circuit breaker to cut off according to the first protection instruction;
and when the first abnormal probability is smaller than the preset abnormal probability, acquiring a second protection instruction, and controlling the circuit breaker to turn on a circuit according to the second protection instruction.
Further, the anomaly probability calculation module 15 further includes:
；
wherein,the first probability of anomaly is characterized by,an event that characterizes the occurrence of an anomaly of the component,in order to characterize the occurrence of an abnormal event in the line,in order to ensure that the contact generates an abnormal event, n is the number of data sets of the abnormal data set;
a conditional probability of line-current anomalies under the condition of element-current anomalies in the i-th set of anomaly data;to the probability of contact-current anomalies under the conditions of element-current anomalies and line-current anomalies in the ith set of anomaly data.
Further, the system further comprises a correlation coefficient adjustment module, wherein the correlation coefficient adjustment module is used for:
acquiring a current direction of the bus, arranging electronic elements on the bus according to the current direction, and outputting a first element arrangement result;
positioning the element abnormal data set according to the first element arrangement result to obtain a first positioning sequence;
generating a first adjustment coefficient according to the number of elements in the same direction of the current after the first positioning sequence, and adjusting the first correlation coefficient according to the first adjustment coefficient.
Further, the system further comprises a second circuit breaker protection module for:
judging whether a second circuit breaker exists or not based on a bus where the first circuit breaker is located;
and if the second circuit breaker exists, transmitting the protection instruction to the second circuit breaker when the protection instruction of the first circuit breaker fails, and controlling the protection switching of the second circuit breaker.
The specific example of the circuit breaker intelligent protection method for multi-path measurement data in the first embodiment is also applicable to the circuit breaker intelligent protection system for multi-path measurement data in the present embodiment, and by the foregoing detailed description of the circuit breaker intelligent protection method for multi-path measurement data, those skilled in the art can clearly know the circuit breaker intelligent protection system for multi-path measurement data in the present embodiment, so that the description is omitted herein for brevity.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and are not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (8)
1. An intelligent protection method for a circuit breaker of multipath measurement data is characterized by comprising the following steps:
acquiring a bus where a first circuit breaker is located, and acquiring an electronic element on the bus;
setting a multi-path monitoring model, wherein the multi-path monitoring model comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises an element monitoring channel based on the electronic element, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker;
outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model;
carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set, and outputting an abnormal data set;
calculating the probability of occurrence of the abnormality of the first circuit breaker according to the abnormality data, and outputting a first abnormality probability;
and sending a protection instruction to the first circuit breaker according to the first abnormal probability, and performing protection switching on the first circuit breaker based on the protection instruction.
2. The method of claim 1, wherein the method further comprises:
acquiring the abnormal data set, wherein the abnormal data set comprises an element abnormal data set, a line abnormal data set and a contact abnormal data set;
performing abnormality-current variation correlation identification with the element abnormality data set, the line abnormality data set, and the contact abnormality data set, and outputting a first correlation coefficient, a second correlation coefficient, and a third correlation coefficient;
and performing anomaly calculation according to the first correlation coefficient, the second correlation coefficient and the third phase relation number, and outputting the first anomaly probability.
3. The method of claim 2, wherein outputting the first anomaly probability, the method further comprising:
carrying out current anomaly probability calculation according to the element anomaly data set, the line anomaly data set and the contact anomaly data set to respectively obtain element-current anomaly probability, line-current anomaly probability and contact-current anomaly probability;
performing conditional probability calculation on the element-current abnormality probability and the line-current abnormality probability, and outputting a first conditional probability;
and carrying out secondary conditional probability calculation on the first conditional probability and the contact-current abnormality probability, and outputting the first abnormality probability.
4. The method of claim 1, wherein transmitting a protection instruction to the first circuit breaker based on the first probability of anomaly, the method comprising:
collecting the bearing current of the first circuit breaker, and setting a bearing current upper limit target according to the bearing current;
acquiring a real-time change current corresponding to the first abnormal probability;
judging the first abnormal probability, and when the first abnormal probability is larger than a preset abnormal probability and the real-time change current is larger than or equal to the load current upper limit target, acquiring a first protection instruction, and controlling the circuit breaker to cut off according to the first protection instruction;
and when the first abnormal probability is smaller than the preset abnormal probability, acquiring a second protection instruction, and controlling the circuit breaker to turn on a circuit according to the second protection instruction.
5. A method as claimed in claim 3, wherein the method further comprises:
；
wherein,characterizing said first anomaly probability, +_>Event indicative of abnormality of element->To characterize the occurrence of an abnormality in the line, +.>In order to ensure that the contact generates an abnormal event, n is the number of data sets of the abnormal data set;
a conditional probability of line-current anomalies under the condition of element-current anomalies in the i-th set of anomaly data;to the probability of contact-current anomalies under the conditions of element-current anomalies and line-current anomalies in the ith set of anomaly data.
6. The method of claim 2, wherein the method further comprises:
acquiring a current direction of the bus, arranging electronic elements on the bus according to the current direction, and outputting a first element arrangement result;
positioning the element abnormal data set according to the first element arrangement result to obtain a first positioning sequence;
generating a first adjustment coefficient according to the number of elements in the same direction of the current after the first positioning sequence, and adjusting the first correlation coefficient according to the first adjustment coefficient.
7. The method of claim 1, wherein the method further comprises:
judging whether a second circuit breaker exists or not based on a bus where the first circuit breaker is located;
and if the second circuit breaker exists, transmitting the protection instruction to the second circuit breaker when the protection instruction of the first circuit breaker fails, and controlling the protection switching of the second circuit breaker.
8. A circuit breaker intelligent protection system for multiple measured data, characterized by the steps for performing any one of the circuit breaker intelligent protection methods for multiple measured data as claimed in claims 1-7, said system comprising:
the electronic element acquisition module is used for acquiring a bus where the first circuit breaker is located and acquiring an electronic element on the bus;
the monitoring model setting module is used for setting a multi-path monitoring model, wherein the multi-path monitoring model comprises a multi-path monitoring channel, and the multi-path monitoring channel comprises an element monitoring channel based on the electronic element, a line monitoring channel of the bus and a contact monitoring channel of the first circuit breaker;
the monitoring data set output module is used for outputting an element monitoring data set, a line monitoring data set and a contact monitoring data set according to each path of monitoring channels in the multi-path monitoring model;
the abnormal data identification module is used for carrying out abnormal data identification on the element monitoring data set, the line monitoring data set and the contact monitoring data set and outputting an abnormal data set;
the abnormal probability calculation module is used for calculating the probability of occurrence of the abnormality of the first circuit breaker according to the abnormal data and outputting a first abnormal probability;
and the protection switching module is used for sending a protection instruction to the first circuit breaker according to the first abnormal probability and carrying out protection switching on the first circuit breaker based on the protection instruction.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0933859A1 (en) * | 1998-01-29 | 1999-08-04 | ABB ADDA S.p.A. | Electronic on-line control and monitoring system for high-voltage circuit breakers |
| CN112821359A (en) * | 2020-12-25 | 2021-05-18 | 深圳供电局有限公司 | Protection system for power line, circuit breaker, and protection method for power line |
| CN114285165A (en) * | 2021-12-26 | 2022-04-05 | 苏州赢霆信息科技有限公司 | Intelligent circuit breaker system |
| CN115085384A (en) * | 2022-07-25 | 2022-09-20 | 深圳市朝阳辉电气设备有限公司 | Intelligent power consumption monitoring terminal device |
| CN115856514A (en) * | 2023-02-28 | 2023-03-28 | 宝胜高压电缆有限公司 | Intelligent operation abnormity monitoring and positioning method and system for polypropylene cable |
| CN116260119A (en) * | 2023-05-08 | 2023-06-13 | 镇江默勒电器有限公司 | Circuit breaker protection method and system for circuit data identification |
| US20230377823A1 (en) * | 2020-11-02 | 2023-11-23 | Smartfuture | Method and Device for Monitoring the Operating State of Circuit Breakers |
-
2023
- 2023-12-11 CN CN202311684287.XA patent/CN117394290B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0933859A1 (en) * | 1998-01-29 | 1999-08-04 | ABB ADDA S.p.A. | Electronic on-line control and monitoring system for high-voltage circuit breakers |
| US20230377823A1 (en) * | 2020-11-02 | 2023-11-23 | Smartfuture | Method and Device for Monitoring the Operating State of Circuit Breakers |
| CN112821359A (en) * | 2020-12-25 | 2021-05-18 | 深圳供电局有限公司 | Protection system for power line, circuit breaker, and protection method for power line |
| CN114285165A (en) * | 2021-12-26 | 2022-04-05 | 苏州赢霆信息科技有限公司 | Intelligent circuit breaker system |
| CN115085384A (en) * | 2022-07-25 | 2022-09-20 | 深圳市朝阳辉电气设备有限公司 | Intelligent power consumption monitoring terminal device |
| CN115856514A (en) * | 2023-02-28 | 2023-03-28 | 宝胜高压电缆有限公司 | Intelligent operation abnormity monitoring and positioning method and system for polypropylene cable |
| CN116260119A (en) * | 2023-05-08 | 2023-06-13 | 镇江默勒电器有限公司 | Circuit breaker protection method and system for circuit data identification |
Non-Patent Citations (1)
| Title |
|---|
| 李卫良 等: "高压断路器在线监测技术的综合研究", 江苏电机工程, vol. 27, no. 01, pages 46 - 48 * |
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