CN116865205B - Wireless breaker fault early warning method and system - Google Patents
Wireless breaker fault early warning method and system Download PDFInfo
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- CN116865205B CN116865205B CN202311132627.8A CN202311132627A CN116865205B CN 116865205 B CN116865205 B CN 116865205B CN 202311132627 A CN202311132627 A CN 202311132627A CN 116865205 B CN116865205 B CN 116865205B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000005611 electricity Effects 0.000 claims abstract description 14
- 230000002159 abnormal effect Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000011895 specific detection Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
Abstract
The invention relates to the technical field of fault early warning, in particular to a wireless circuit breaker fault early warning method and system, comprising the following steps: acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits; acquiring load change curves F (Rn) of different branch circuits in a calibration period; and calculates an average calibration load Rpn for each branch circuit; calculating an operation margin Ryn =max (n) -Rpn of each branch circuit; setting a safe load upper limit max (Rn) of each branch circuit; the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off. According to the invention, the load limit of each branch circuit can be calculated by setting the calibration process, so that the early warning function is realized.
Description
Technical Field
The invention relates to the technical field of fault early warning, in particular to a wireless circuit breaker fault early warning method and system.
Background
A circuit breaker is an electrical device for protecting an electrical circuit from over-currents, short circuits, and other electrical faults. When the current exceeds the set value, the circuit is automatically cut off, so that the wires, cables, equipment or systems are prevented from being damaged, and the safety of personnel is ensured. Circuit breakers are commonly used for circuit protection in homes, industries, businesses, and public facilities. With the rapid development of the internet of things and smart home, the traditional circuit breaker lacks the wireless communication capability with the modern technology. Therefore, in order to meet the demands of people for higher-level power safety management, a breaker with a communication function such as WIFI has been developed, and remote operation and fault monitoring can be performed through network connection.
However, the existing circuit breaker is to break the circuit to protect the circuit equipment and personnel after the problems of overload, short circuit, ground fault and the like occur in the circuit, and to realize the opening of the manual remote control circuit and to receive the alarm signal from the circuit breaker after the communication module is carried; and the risk of the loop cannot be evaluated under the conditions of current running state or reference history data and the like, and the risk prediction is carried out, so that the early warning function is realized.
Disclosure of Invention
The invention aims to provide a wireless circuit breaker fault early warning method and system, which solve the technical problems.
The aim of the invention can be achieved by the following technical scheme:
a wireless breaker fault early warning method comprises the following steps:
acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
the upper limit max (Rn) of the safety load of each branch circuit is set, and the calculation formula is as follows:wherein F (Rn) _max represents negativeMaximum value of load change curve F (Rn);
the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off.
As a further scheme of the invention: the method also comprises a main loop load check process, wherein the check process is specifically as follows:
obtaining the maximum load Rmax of the main loop;
computing the sum of the upper safe load limits of the branch circuits；
Judging whether Rmax-Ra is equal to or greater than Rsum, wherein Ra represents a preset safety threshold;
if Rmax-Ra is more than or equal to Rsum, checking is completed; if Rmax-Ra is not equal to or greater than Rsum, the safety load upper limit max (Rn) of each branch circuit is revised again.
As a further scheme of the invention: when Rmax-Ra is not equal to or greater than Rsum, the specific steps for revising the safe load upper limit max (Rn) of each branch circuit are as follows:
calculating a load overrun rcc=rsum- (Rmax-Ra);
calculating the distribution ratio of each branch circuit；
The upper limit of the safety load of each branch circuit is adjusted to max (Rn)' =max (Rn) -kn·rcc.
As a further scheme of the invention: the circuit breaker further comprises a main loop load detection, and the operation of the circuit breaker is controlled through the load detection of the main loop, wherein the specific steps are as follows:
acquiring the instantaneous load of the main loop, and calculating the difference value between the instantaneous load and the instantaneous load acquired last time;
when the absolute value of the difference value is larger than or equal to a preset threshold value, recording as one abnormal fluctuation;
when the abnormal fluctuation continuously occurs and the continuous times reach the preset early warning times, the circuit is automatically cut off and early warning information is sent.
As a further scheme of the invention: after the main circuit automatically cuts off the circuit because of a plurality of abnormal fluctuation continuously, each branch circuit is detected, and the specific detection process is as follows:
load change data of each branch in a specific time period is obtained, wherein the specific time period is from a time node with abnormal fluctuation for the first time to a current time node;
calculating the difference value of the load data of two adjacent times in the load change data of different branches and generating a set delta Rn;
calculating the operation change coefficient of each branch circuitAnd screening out branch circuits with the operation change coefficient B exceeding a preset value as key maintenance objects.
As a further scheme of the invention: when a new electric appliance is connected into the branch circuit, the maximum load of the branch circuit is unchanged, the calibration period is required to be reset, and the upper limit of the safety load of each branch circuit is calculated.
As a further scheme of the invention: when the load of the main loop reaches Rmax-Ra, the circuit is automatically cut off and early warning information is sent.
A wireless circuit breaker fault early warning system, comprising:
an information collection module: acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
and (3) a calibration module: acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
the upper limit max (Rn) of the safety load of each branch circuit is set, and the calculation formula is as follows:；
wherein F (Rn) _max represents the maximum value of the load change curve F (Rn);
and the real-time monitoring module is used for: the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off.
The invention has the beneficial effects that: in the invention, a corresponding calibration process is set, namely a calibration period in the invention, and in the calibration period, each branch circuit is in a normal working state, wherein the normal working state refers to a stable working state of all electric appliances in the branch circuit; detecting a load change curve of each branch circuit in a calibration period; the method comprises the steps of firstly correcting an average calibration load according to the average calibration load serving as a basis through the operation margin of a branch circuit, so that the theoretical upper limit of a safe load is calculated, and finally, carrying out secondary correction according to the load limit of a main circuit, so that the upper limit value for detecting each branch circuit is obtained, and the early warning function is realized.
Drawings
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a wireless circuit breaker fault early warning method 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.
With the rapid development of the internet of things and smart home, home power security management is becoming more and more important. Conventional rail-mounted circuit breakers play a critical role in protecting against circuit overload, short-circuits, or leakage faults, but they lack the ability to communicate wirelessly with modern technology.
In order to meet the demands of people for higher-level power safety management, a guide rail type circuit breaker with a WIFI function is generated. The novel design aims at combining the traditional functions of the circuit breaker with the wireless network technology so as to achieve the effect that the user is more convenient, and brings extremely experience and technological sense to the user.
Referring to fig. 1, the invention provides a wireless circuit breaker fault early warning method, which comprises the following steps:
acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:；
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
setting eachThe calculation formula of the safe load upper limit max (Rn) of each branch circuit is as follows:；
wherein F (Rn) _max represents the maximum value of the load change curve F (Rn);
monitoring the running state of each branch circuit in real time, and automatically cutting off the circuit when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load;
in this embodiment, the method further includes a main loop load checking process, where the checking process is specifically as follows:
obtaining the maximum load Rmax of the main loop;
computing the sum of the upper safe load limits of the branch circuits；
Judging whether Rmax-Ra is equal to or greater than Rsum, wherein Ra represents a preset safety threshold;
if Rmax-Ra is more than or equal to Rsum, checking is completed; if Rmax-Ra is not equal to or greater than Rsum, the safety load upper limit max (Rn) of each branch circuit is revised again.
When Rmax-Ra is not equal to or greater than Rsum, the specific steps for revising the safe load upper limit max (Rn) of each branch circuit are as follows:
calculating a load overrun rcc=rsum- (Rmax-Ra);
calculating the distribution ratio of each branch circuit；
The upper limit of the safety load of each branch circuit is adjusted to max (Rn)' =max (Rn) -kn·rcc.
It is known that a circuit breaker is a protection device used in an electrical system for preventing an overload or a short circuit of a circuit caused by an exceeding of a set value of a current. It is an automatic switch in the circuit that can be rapidly interrupted when the current is abnormal to protect electrical equipment, personnel and the environment from potential hazards. And by additionally arranging wifi and other communication modules on the conventional circuit breaker, remote monitoring and control can be realized, and the circuit breaker is more convenient.
In the specific scheme of the invention, a plurality of branch circuits are arranged on the main circuit, are connected in parallel and are connected with the circuit breaker, and when overload phenomenon occurs to the circuit, the circuit is actively cut off, so that the safety of electric appliances, staff, buildings and the like is protected;
in the invention, a corresponding calibration process is set, namely a calibration period in the invention, and in the calibration period, each branch circuit is in a normal working state, wherein the normal working state refers to a stable working state of all electric appliances in the branch circuit; detecting a load change curve of each branch circuit in a calibration period; the method comprises the steps of firstly correcting an average calibration load according to the average calibration load serving as a basis through the operation margin of a branch circuit, so that the theoretical upper limit of a safe load is calculated, and finally, carrying out secondary correction according to the load limit of a main circuit, so that the upper limit value for detecting each branch circuit is obtained, and the early warning function is realized.
In a preferred embodiment of the present invention, the method further comprises main loop load detection, and the operation of the circuit breaker is controlled through the load detection of the main loop, wherein the specific steps are as follows:
acquiring the instantaneous load of the main loop, and calculating the difference value between the instantaneous load and the instantaneous load acquired last time;
when the absolute value of the difference value is larger than or equal to a preset threshold value, recording as one abnormal fluctuation;
when the abnormal fluctuation continuously occurs and the continuous times reach the preset early warning times, the circuit is automatically cut off and early warning information is sent.
In a preferred embodiment of the present invention, after the main circuit automatically shuts down due to a plurality of abnormal fluctuations, each branch circuit is tested, and the specific test procedure is as follows:
load change data of each branch in a specific time period is obtained, wherein the specific time period is from a time node with abnormal fluctuation for the first time to a current time node;
calculating the difference value of the load data of two adjacent times in the load change data of different branches and generating a set delta Rn;
calculating the operation change coefficient of each branch circuitAnd screening out branch circuits with the operation change coefficient B exceeding a preset value as key maintenance objects.
In a preferred embodiment of the present invention, when a new electrical appliance is connected to the branch circuit, the maximum load of the branch circuit is unchanged, and the calibration period needs to be reset, and the upper limit of the safety load of each branch circuit is calculated.
In a preferred embodiment of the invention, the circuit is automatically shut down and an early warning message is sent when the main loop load reaches Rmax-Ra.
A wireless circuit breaker fault early warning system, comprising:
an information collection module: acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
and (3) a calibration module: acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:；
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
the upper limit max (Rn) of the safety load of each branch circuit is set, and the calculation formula is as follows:；
wherein F (Rn) _max represents the maximum value of the load change curve F (Rn);
and the real-time monitoring module is used for: the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. The wireless breaker fault early warning method is characterized by comprising the following steps of:
acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:；
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
the upper limit max (Rn) of the safety load of each branch circuit is set, and the calculation formula is as follows:；
wherein F (Rn) _max represents the maximum value of the load change curve F (Rn);
the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off.
2. The wireless circuit breaker fault early warning method according to claim 1, further comprising a main loop load checking process, wherein the checking process specifically comprises the following steps:
obtaining the maximum load Rmax of the main loop;
computing the sum of the upper safe load limits of the branch circuits；
Judging whether Rmax-Ra is equal to or greater than Rsum, wherein Ra represents a preset safety threshold;
if Rmax-Ra is more than or equal to Rsum, checking is completed; if Rmax-Ra is not equal to or greater than Rsum, the safety load upper limit max (Rn) of each branch circuit is revised again.
3. The wireless circuit breaker fault pre-warning method according to claim 2, wherein when Rmax-Ra is not equal to or greater than Rsum, the specific step of re-correcting the safe load upper limit max (Rn) of each branch circuit is as follows:
calculating a load overrun rcc=rsum- (Rmax-Ra);
calculating the distribution ratio of each branch circuit；
The upper limit of the safety load of each branch circuit is adjusted to max (Rn)' =max (Rn) -kn·rcc.
4. The wireless circuit breaker failure pre-warning method according to claim 2, further comprising the main loop load detection, wherein the operation of the circuit breaker is controlled by the load detection of the main loop, and the specific steps are as follows:
acquiring the instantaneous load of the main loop, and calculating the difference value between the instantaneous load and the instantaneous load acquired last time;
when the absolute value of the difference value is larger than or equal to a preset threshold value, recording as one abnormal fluctuation;
when the abnormal fluctuation continuously occurs and the continuous times reach the preset early warning times, the circuit is automatically cut off and early warning information is sent.
5. The wireless circuit breaker failure pre-warning method according to claim 4, wherein after the main circuit is automatically cut off due to a plurality of abnormal fluctuations occurring in succession, each branch circuit is detected, and a specific detection process is as follows:
load change data of each branch in a specific time period is obtained, wherein the specific time period is from a time node with abnormal fluctuation for the first time to a current time node;
calculating the difference value of the load data of two adjacent times in the load change data of different branches and generating a set delta Rn;
calculating the operation change coefficient of each branch circuitAnd screening out branch circuits with the operation change coefficient B exceeding a preset value as key maintenance objects.
6. The method for warning the fault of the wireless circuit breaker according to claim 2, wherein when a new electric appliance is connected into the branch circuit, the maximum load of the branch circuit is unchanged, the calibration period is required to be reset, and the upper limit of the safety load of each branch circuit is calculated.
7. The wireless circuit breaker failure warning method of claim 2, wherein when the main loop load reaches Rmax-Ra, the circuit is automatically cut off and warning information is sent.
8. A wireless circuit breaker fault early warning system, comprising:
an information collection module: acquiring electricity consumption information of a plurality of branch circuits connected with a circuit breaker, wherein the electricity consumption information comprises real-time load and maximum load of the branch circuits;
and (3) a calibration module: acquiring load change curves F (Rn) of different branch circuits in a calibration period; the calibration period is a preset time period, and each branch circuit is in a normal running state in the calibration period;
and calculates the average calibration load Rpn of each branch circuit as follows:；
wherein Rn represents the real-time load of the branch circuit n, rpn represents the average calibration load of the branch circuit n, t1 represents the start time of the calibration period, and t2 represents the end time of the calibration period;
calculating an operation margin Ryn =max (n) -Rpn for each branch circuit, where max (n) represents the maximum load of branch circuit n;
the upper limit max (Rn) of the safety load of each branch circuit is set, and the calculation formula is as follows:；
wherein F (Rn) _max represents the maximum value of the load change curve F (Rn);
and the real-time monitoring module is used for: the operation state of each branch circuit is monitored in real time, and when the instantaneous load of one branch circuit is greater than or equal to the upper limit max (Rn) of the safety load, the circuit is automatically cut off.
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