CN117713005A - Circuit breaker control method, device, equipment and storage medium - Google Patents

Abstract

The application provides a circuit breaker control method, a circuit breaker control device, a circuit breaker control equipment and a storage medium, and relates to the technical field of power supply line control. In the circuit breaker control method provided by the application, at least two heating positions in a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker are subjected to temperature detection to obtain a plurality of temperature values, the plurality of temperature values are subjected to fuzzy processing to obtain fault grades, and finally fuzzy decision is carried out according to the fault grades, so that the tripping or alarming control of the circuit breaker is realized. The comprehensive evaluation of a plurality of easily-heated points of the circuit breaker is carried out in a fuzzy processing and fuzzy decision mode, the comprehensive evaluation of the multi-point temperature is carried out, and corresponding protection strategies are formulated, so that the circuit breaker is more suitable for practical scene application due to the protection strategies of different grades, and the reliability of the circuit breaker is improved.

Description

Circuit breaker control method, device, equipment and storage medium

Technical Field

The application relates to the technical field of power supply line control, in particular to a circuit breaker control method, a circuit breaker control device, circuit breaker control equipment and a storage medium.

Background

A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and closing, carrying and breaking a current under abnormal circuit conditions within a prescribed time. In power generation, transmission, transformation, power distribution and other systems, the circuit breaker works for a long time, and the circuit breaker part structure is seriously heated possibly due to factors such as excessive current, working vibration, natural oxidation of contacts, dirt, aging and the like, if the circuit breaker part structure is not processed in time, the normal action of the circuit breaker can be influenced, and even the circuit is on fire and other conditions occur.

At present, in order to solve the heating problem, a method of judging a current threshold value and monitoring the temperature of a busbar single point is generally adopted to judge whether the temperature rise of a product caused by current overload is large, so that the circuit breaker is subjected to switching-off control. However, the method has single judging direction, only can judge the temperature rise caused by the bus-bar current or the temperature overrun, and the bus-bar single-point temperature measurement has hysteresis, can not monitor the overtemperature of other parts, and can not realize comprehensive risk assessment and temperature protection or early warning.

Disclosure of Invention

In view of this, an object of the embodiments of the present application is to provide a circuit breaker control method, apparatus, device, and storage medium, which are capable of obtaining a plurality of temperature values by detecting temperatures of at least two heating positions in a moving contact, a flexible connection line, an incoming connection terminal, an outgoing connection terminal, a measurement element, and a controller of the circuit breaker, performing fuzzy processing on the plurality of temperature values to obtain a fault level, and finally performing fuzzy decision according to the fault level, thereby realizing control of tripping or alarming of the circuit breaker, so as to solve the technical problems of "judging direction is single, hysteresis is provided, overtemperature of other parts cannot be monitored, and comprehensive risk assessment and temperature protection or early warning" cannot be achieved.

In a first aspect, an embodiment of the present application provides a circuit breaker control method, including: detecting the temperature of a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations comprises: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; performing fuzzy processing on the plurality of temperature values to obtain the fault grade of the circuit breaker; and carrying out fuzzy decision according to the fault level so as to control the breaker to trip or alarm.

In the implementation process, the fuzzy control mode of fuzzy processing and fuzzy decision is used for comprehensively evaluating a plurality of easily-heated points of the circuit breaker, and simultaneously, fault or alarm reasons and execution instructions can be informed to a user, so that the reliability of power supply of the circuit breaker is ensured, the possibility of line burning or damage of circuit breaker devices is reduced to the maximum extent, and meanwhile, a basis is provided for positioning the fault.

Optionally, the blurring processing is performed on the plurality of temperature values to obtain a fault level of the circuit breaker, including: judging the heating grades corresponding to a plurality of heating positions according to the plurality of temperature values; wherein the heating level includes a general temperature level, a general heating level, and a severe heating level; the temperature value corresponding to the general heating grade is smaller than a first experience threshold, the temperature value corresponding to the general heating grade is between the first experience threshold and a second experience threshold, and the temperature value corresponding to the serious heating grade is larger than the second experience threshold; and determining the fault level of the circuit breaker according to the heat generation levels of the plurality of heat generation positions.

In the implementation process, by measuring the temperature at multiple points, the hysteresis of single-point temperature measurement is avoided, the system fault cause can be evaluated, and the fault point is predicted. The fuzzy control theory is adopted to comprehensively evaluate the multipoint temperature, corresponding protection strategies are formulated, and the protection strategies of different grades enable the circuit breaker to be more suitable for actual scene application, and the reliability of the circuit breaker is improved.

Optionally, the determining the fault level of the circuit breaker according to the heat generation levels of the plurality of heat generation positions includes: arranging the heating positions in descending order according to the temperature values to obtain an arrangement result; judging whether the arrangement result meets a preset temperature sequence or not to obtain a judgment result; the measuring element comprises a transformer, a shunt and a Hall element, and the preset temperature sequence is as follows: the device comprises a moving contact, a shunt, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a transformer or a Hall element and a controller; and determining the fault level of the circuit breaker according to the judging result and the heating level.

In the implementation process, the fault risk level of the circuit breaker is estimated by carrying out fuzzy quantization processing twice, the fuzzy processing twice is carried out on the basis of the fuzzy quantization processing classification for the first time, and the fuzzy processing enables the fault level type of the circuit breaker to be more accurately analyzed, so that different execution actions are carried out, and the reliability of the circuit breaker is improved.

Optionally, the plurality of heat generating locations includes: at least one of a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; and determining the fault level of the circuit breaker according to the judging result and the heating level, wherein the determining comprises the following steps: if the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a common temperature level, judging that the fault level of the circuit breaker is normal; if the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a serious heating level, judging that the fault level of the circuit breaker is a special fault; if the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a common heating level, judging that the fault level of the circuit breaker is a common fault; if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the moving contact is a serious heating level, judging that the fault level of the circuit breaker is a general fault; and if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the moving contact is a common heating level, judging that the fault level of the circuit breaker is an alarm.

In the implementation process, the multi-point temperature comprehensive fuzzy processing is further divided into four general danger levels of executing strategies such as normal, alarming, general faults and special faults, the fault level type of the circuit breaker can be more accurately analyzed, and the protection strategies of different levels enable the circuit breaker to be more suitable for practical scene application, so that the reliability of the circuit breaker is improved.

Optionally, the fuzzy decision is made according to the fault level to control the breaker to trip or alarm, including: if the fault level is normal, sending an action command to control the breaker not to trip and not to alarm; if the fault level is an alarm, sending an action instruction to control the circuit breaker to alarm; if the fault grade is a general fault, sending an action instruction to control the circuit breaker to carry out delay tripping; and if the fault level is a special fault, sending an action command to control the breaker to trip immediately.

In the implementation process, the fault or alarm reasons and the execution instructions can be informed to the user according to the fault level through fuzzy decision, so that the reliability of the power supply of the circuit breaker is guaranteed, the possibility of burning out a current line or damaging a circuit breaker device is reduced, meanwhile, a basis is provided for positioning the fault, and the timeliness and the accuracy of predicting the fault are improved.

Optionally, the blurring process, and blurring decision is performed by a controller of the circuit breaker.

In the implementation process, the fault grade type of the circuit breaker is accurately analyzed through the controller of the circuit breaker, and different execution actions are carried out by sending instructions, so that the circuit breaker is convenient and quick, and the reliability of the circuit breaker and the scientificity of fault pre-judgment are improved.

Optionally, the plurality of temperature values are acquired correspondingly by a plurality of sensors.

In the implementation process, the temperature sensors are respectively arranged at the plurality of heating positions to collect the temperature, so that the accuracy of judging the type of the system faults is improved.

In a second aspect, embodiments of the present application provide a circuit breaker control apparatus, the apparatus including: the multipoint temperature detection module is used for detecting the temperatures of a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations comprises: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; the fuzzy processing module is used for performing fuzzy processing on the plurality of temperature values to obtain the fault grade of the circuit breaker; and the fuzzy control module is used for making fuzzy decisions according to the fault level so as to control the circuit breaker to trip or alarm.

In a third aspect, embodiments of the present application further provide an electronic device, including: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method described above when the electronic device is run.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a circuit breaker control method provided in an embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a circuit breaker according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a circuit breaker control flow provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a functional module of a circuit breaker control device according to an embodiment of the present application;

fig. 5 is a block schematic diagram of an electronic device provided with a circuit breaker control apparatus according to an embodiment of the present application.

Icon: 210-a multi-point temperature detection module; 220-a fuzzy processing module; 230-a fuzzy control module; 300-an electronic device; 311-memory; 312-a storage controller; 313-processor; 314-peripheral interface; 315-an input-output unit; 316-display unit.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. 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. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

The inventor notices that in the power generation, transmission, transformation, power distribution and other systems, the circuit breaker works for a long time, and the circuit breaker part structure may heat seriously due to factors such as excessive current, working vibration, natural oxidation of contacts, dirt, aging and the like, if the circuit breaker part structure is not handled in time, normal action of the circuit breaker may be affected, and even the circuit is on fire and other conditions occur. In order to solve the problems, a method of judging a current threshold value and monitoring the temperature of a busbar single point is generally adopted to judge whether the temperature rise of a product caused by current overload is large, so that the circuit breaker is subjected to switching-off control. However, the method has single judging direction, only can judge the temperature rise caused by the bus-bar current or the temperature overrun, and the bus-bar single-point temperature measurement has hysteresis, can not monitor the overtemperature of other parts, and can not realize comprehensive risk assessment and temperature protection or early warning. In view of this, the application proposes a multipoint temperature fuzzy control method of a circuit breaker to overcome hysteresis and narrowness of single-point temperature monitoring in the prior art, and specifically describes as follows:

Fuzzy control: the control mode of the system operation is controlled by adopting a control law described by a fuzzy mathematical language, and the control mode directly uses human expert experience as a control rule without establishing an accurate mathematical model, so that a control mechanism and a control strategy are easy to understand and accept.

Referring to fig. 1, fig. 1 is a flowchart of a circuit breaker control method according to an embodiment of the present application, where the method includes: step 100, step 120, step 140.

Step 100: detecting the temperature of a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations includes: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker;

step 120: performing fuzzy processing on the plurality of temperature values to obtain the fault grade of the circuit breaker;

step 140: and carrying out fuzzy decision according to the fault level to control the breaker to trip or alarm.

For example, circuit breakers can be used to distribute electrical energy, to start asynchronous motors infrequently, to protect power lines and motors, and to automatically cut off fault circuits when they are severely overloaded or short-circuited or undervoltage, and to function as a combination of a fuse switch and an over-under-heating relay.

As shown in fig. 2, the circuit breaker includes, besides the moving and static contacts, the flexible connection wires, the incoming connection terminals, the outgoing connection terminals, the measuring element, the controller and other positions that are easy to generate heat and easy to generate temperature rise in fig. 2, an arc extinguishing system, an operating mechanism, a release (protection device), a casing and other mechanisms, where the measuring element may include specific devices such as a transformer, a hall element, a shunt and the like for measuring the magnitude of loop current. When short circuit occurs, the magnetic field generated by large current (generally 10 to 12 times) overcomes the counter-force spring, the release pulls the operating mechanism to act, and the switch is tripped instantaneously; when overload occurs, the current increases, the heating value increases, and the bimetal deforms to a certain extent to push the operation mechanism to act (the larger the current is, the shorter the operation time is).

The dynamic and static contacts mainly are large in contact resistance, so that heating is increased, and temperature rise is increased; the soft connecting wire comprises a connecting wire joint and the temperature rise of the connecting wire; the incoming line connecting terminal and the outgoing line connecting terminal are mainly temperature rise of bolt connecting points; the transformer or the Hall element is mainly temperature rise caused by overlarge secondary side current; the controller is mainly the temperature rise caused by energy release or other devices with current; the shunt can be regarded as a small resistor (typically u omega or m omega) through which the current flows, which heats up, so that the shunt is a temperature rise caused by an excessive current in the main circuit. The plurality of heating positions in the embodiment of the application can comprise any at least two of the heating positions of the moving contact, the flexible connecting wire, the incoming wire connecting terminal, the outgoing wire connecting terminal, the measuring element, the controller and the like. For example, a combination of multiple heat generating locations may be: a moving contact and a flexible connecting wire; or a flexible connection line and a controller; or a moving contact, a flexible connecting wire, an outgoing line connecting terminal and a controller; or various combinations of the moving contact, the flexible connection wire, the incoming connection terminal, the outgoing connection terminal, the measuring element, the controller and the like, are not listed here, and are preferably introduced by a plurality of heating position combinations of the moving contact, the flexible connection wire, the incoming connection terminal, the outgoing connection terminal, the measuring element and the controller.

And taking a plurality of heating positions of the circuit breaker as a plurality of temperature measuring points for temperature detection, feeding back self temperature information to a control unit of the circuit breaker controller in real time through wired or wireless modes and the like, calculating corresponding temperature values by the control unit through AD conversion according to summarized temperature information, performing fuzzy processing, evaluating the total fault level, and correspondingly sending related instructions to execute tripping or alarming, thereby realizing protection of a power distribution circuit. It is noted that the circuit breaker control method provided by the application can be applied to an alternating current circuit breaker with a transformer and can also be applied to a direct current circuit breaker with a shunt. Those skilled in the art will appreciate that the structure and function of a particular circuit breaker should not be considered as limiting the circuit breaker control method provided herein.

The method has the advantages that each easily-heated spot of the circuit breaker is comprehensively evaluated in a fuzzy control mode of fuzzy processing and fuzzy decision, and meanwhile, fault or alarm reasons and execution instructions can be informed to a user or a control system and a recording system, so that the reliability of power supply of the circuit breaker is guaranteed, the possibility of line burning or damage of circuit breaker devices is reduced to the maximum extent, and meanwhile, a basis is provided for positioning faults.

In one embodiment, step 120 may include: step 121, step 122.

Step 121: judging the heating grades corresponding to the heating positions according to the temperature values; wherein the heating level includes a general temperature level, a general heating level, and a severe heating level; the temperature value corresponding to the general temperature grade is smaller than the first experience threshold, the temperature value corresponding to the general heating grade is between the first experience threshold and the second experience threshold, and the temperature value corresponding to the serious heating grade is larger than the second experience threshold;

step 122: and determining the fault level of the circuit breaker according to the heat generation levels of the plurality of heat generation positions.

For example, the first and second empirical thresholds may be temperature values flexibly set according to daily life breaker use experience. For example, the first empirical threshold and the second empirical threshold may be a plurality of empirical values such as 40 ℃, 50 ℃, 60 ℃, 70 ℃, 80 ℃ and the like, but the value of the first empirical threshold is smaller than the value of the second empirical threshold, so that the heating level and the corresponding temperature range can be adjusted according to the actual scene.

Optionally: the first experience threshold is 60 ℃, the second experience threshold is 80 ℃, fuzzy quantization treatment is carried out on the temperature values, namely single-point dangerous grade classification is carried out on single-point temperature values, and a plurality of measured temperature values can be classified into three grades according to the heating degree: the temperature range of the general heating grade is 60 ℃ and the temperature range of the general heating grade is 60-80 ℃ and the temperature range of the serious heating grade is more than 80 ℃. According to the measured temperature values of the heating positions, based on the fuzzy quantitative classification result, different heating grades of the temperature measuring points of each heating position can be judged, comprehensive fuzzy quantitative treatment is carried out again according to the heating grades of the different temperature measuring points, namely, total fault grade division is carried out on the basis of single-point temperature heating grade evaluation, and then the fault grade of the circuit breaker can be evaluated.

By measuring the temperature at multiple points, the hysteresis of single-point temperature measurement is avoided, the system fault cause can be assessed, and the fault point is predicted. The fuzzy control theory is adopted to comprehensively evaluate the multipoint temperature, corresponding protection strategies are formulated, and the protection strategies of different grades enable the circuit breaker to be more suitable for actual scene application, and the reliability of the circuit breaker is improved.

In one embodiment, step 122 may include: step 1221, step 1222, and step 1223.

Step 1221: arranging the heating positions in descending order according to the temperature values to obtain an arrangement result;

step 1222: judging whether the arrangement result meets the preset temperature sequence or not to obtain a judgment result; the measuring element comprises a transformer, a shunt and a Hall element, and the preset temperature sequence is as follows: the device comprises a moving contact, a shunt, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a transformer or a Hall element and a controller;

step 1223: and determining the fault level of the circuit breaker according to the judging result and the heating level.

Illustratively: the preset temperature sequence may be a temperature sequence represented when the temperature measurement point values of the plurality of heating positions satisfy the main loop current. (1) When the circuit breaker is an ac circuit breaker with a transformer or a dc circuit breaker with a hall element, the preset temperature sequence may be: the device comprises a moving contact, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a mutual inductor and a controller, or comprises a moving contact, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a Hall element and a controller. Because if the main loop current is too high, which causes high temperature risk, the moving and static contacts are generally the highest in temperature, followed by the wire inlet connection terminal or wire outlet connection terminal nearest to the contacts, and further by the flexible connection wire, then the transformer or hall element, and finally by the controller. The main loop is a current loop formed by a moving contact, a wire inlet connecting terminal, a flexible connecting wire and a wire outlet connecting terminal; the transformer may be a current transformer for detecting an alternating current of the main current loop; the hall element may be used to detect the direct current of the main current loop; the controller is used for carrying out fuzzy processing and fuzzy decision control; (2) When the circuit breaker is a dc circuit breaker with a shunt, the preset temperature sequence may be: the current loop is composed of the moving contact, the current divider, the incoming connection terminal or the outgoing connection terminal, the flexible connection wire and the controller, and the main loop is composed of the moving contact, the current divider, the incoming connection terminal, the flexible connection wire and the outgoing connection terminal, wherein the current divider can serve as a small resistor in the current loop, the current can generate heat when flowing through the resistor, and the temperature of the current divider is only lower than that of the moving contact because the resistance value of the current divider is only lower than that of the moving contact. In particular, the preset temperature sequence is not limited to only the two sequences mentioned above, and may be flexibly set according to actual scenes.

Optionally, the blurring process in step 120 may be performed twice, in which the multiple temperature values after the AD conversion are classified into 60 ℃ or lower (general temperature level), 60 to 80 ℃ (general heat level), 80 ℃ or higher (serious heat level); secondly, the temperature heating grades are classified according to the temperature heating grade sequence (preset temperature sequence) caused by possible fault points of different heating positions and the three heating grades, and the three heating grades can be specifically classified into normal, alarm, general fault, special fault and other fault grades.

The fault risk level of the circuit breaker is estimated by carrying out fuzzy quantization processing twice, the fuzzy quantization processing twice classification is carried out on the basis of the fuzzy quantization processing classification for the first time, and the fuzzy processing enables the fault level type of the circuit breaker to be more accurately analyzed, so that different execution actions are carried out, and the reliability of the circuit breaker is improved.

In one embodiment, the plurality of heat generating locations includes: at least one of a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; step 1223 may include: step 1223a, step 1223b, step 1223c, step 1223d, step 1223e.

Step 1223a: if the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is the common temperature level, judging that the fault level of the circuit breaker is normal;

step 1223b: if the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is a serious heating level, judging that the fault level of the circuit breaker is a special fault;

step 1223c: if the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is the common heating level, judging that the fault level of the circuit breaker is the common fault;

step 1223d: if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the movable contact is a serious heating level, judging that the fault level of the circuit breaker is a general fault;

step 1223e: if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the movable contact is a common heating level, the fault level of the circuit breaker is judged to be an alarm.

Illustratively, the plurality of heat generating locations in this embodiment may include a moving contact and at least one local heat generating location including: flexible connection wires, incoming connection terminals, outgoing connection terminals, measurement elements, controllers, and the like. The total hazard level of a circuit breaker can be divided into four fault levels: normal, alarm, general fault, special fault. The fuzzy processing is classified into four execution strategies of total hazard levels because: firstly, a special fault can trip a current loop with a special heavy load in time, cut off current and protect the fire risk caused by overhigh temperature of a wire for protection; secondly, the general faults have certain evasiveness to short-time faults caused by starting, hot plug, short-time vibration and the like of some equipment, frequent or premature jumping of the circuit breaker is avoided, and the reliability of electricity utilization is improved; furthermore, the alarm is given, and the user is timely informed of some risky situations, so that hidden danger is eliminated.

Alternatively, taking the example that the circuit breaker is an ac circuit breaker with a transformer, based on the preset temperature sequence set in the (1) th case in the above step 1222, the following steps 1223a to 1223e may be performed (1) if the arrangement result of the currently measured multi-point temperature values matches the sequence, namely: the temperature of the moving contact is highest, the moving contact is the most recent incoming line connecting terminal or outgoing line connecting terminal, the soft connecting wire, the mutual inductor and the controller, and the moving contact is of a common temperature grade, which indicates that all heating positions are of a common temperature, and the system fault grade is normal; (2) If the arrangement result of the currently measured multipoint temperature values accords with the preset temperature sequence and the temperatures of the moving contact and the fixed contact reach the serious heating level (more than 80 ℃), the total risk level is the highest, and the system fault level is a special fault; (3) If the temperature of the movable contact and the fixed contact is in the common heating level (60-80 ℃), and the total dangerous level is inferior, the system fault level is a common fault; (4) If the preset temperature sequence is not met, the system is indicated to be locally and seriously heated or generally heated, namely, only the local heating positions except the movable contact and the static contact are subjected to high-temperature phenomenon, and if the local heating positions are locally and seriously heated, the system fault level is a general fault; (5) If the local heating positions except the moving and static contacts are the common heating levels, the system fault level is an alarm. For example: the temperature of the incoming and outgoing line connecting terminal reaches a serious heating level, and other temperature measuring points have a common temperature level or a common heating level, which indicates that the incoming and outgoing line is poor in contact and the fault level belongs to a common fault.

The fault class type of the circuit breaker can be more accurately analyzed through the execution strategies of four total dangerous classes of normal, alarming, general fault, special fault and the like in the multi-point temperature comprehensive fuzzy processing, and the protection strategies of different classes enable the circuit breaker to be more suitable for practical scene application, and the reliability of the circuit breaker is improved.

In one embodiment, step 140 may include: step 141, step 142, step 143, step 144.

Step 141: if the fault level is normal, sending an action command to control the breaker not to trip and not to alarm;

step 142: if the fault level is an alarm, sending an action instruction to control the circuit breaker to alarm;

step 143: if the fault level is a general fault, sending an action command to control the circuit breaker to carry out delay tripping;

step 144: and if the fault level is a special fault, sending an action command to control the breaker to trip immediately.

As shown in fig. 3, a plurality of heating positions of the circuit breaker are used as a plurality of temperature measuring points for temperature detection, each temperature measuring point is subjected to a/D conversion, a plurality of corresponding temperature values can be calculated, fuzzy quantization processing is divided according to the heating level (temperature risk level) of a single temperature measuring point by a user, different heating levels are separated, comprehensive fuzzy quantization processing is carried out again according to the heating levels of different temperature measuring points, the total fault level state (total risk level) is estimated, the system carries out fuzzy decision according to the total fault level, namely whether tripping or alarming is judged, and finally an execution unit carries out non-fuzzy processing, namely tripping or alarming according to the fuzzy decision, and meanwhile the reason and the position of tripping or alarming are reported.

The non-fuzzy processing may be to execute a specific action process according to different sent action instructions, that is, execute a specific action. The final estimated fault level, namely the total risk level, can only be one of normal, alarm, general fault and special fault, the fuzzy decision is that the final decision is judged again after the final decision is ordered according to the summarized single-point temperature heating level, and the temperature degree and degree sequence (preset condition) corresponding to each category which specifically meets the total risk level, meets which corresponding action instruction is sent for tripping or alarming.

When the system fault level is in a normal state, the action instruction sent by the circuit breaker controller does not perform any action; when the system fault level is in an alarm state, sending a corresponding action instruction to alarm only without tripping; when the system fault grade is a general fault, delaying for a certain time to judge again, if the state is continuous, sending a corresponding action instruction to trip, otherwise, reducing the grade; when the system fault level is a special fault, a corresponding action instruction is sent to require the system to trip immediately.

The fault or alarm reasons and the execution instructions can be informed to the user according to the fault level through fuzzy decision, so that the reliability of the power supply of the circuit breaker is guaranteed, the possibility of burning out a current line or damaging a circuit breaker device is reduced, meanwhile, a basis is provided for positioning the fault, and the timeliness and the accuracy of predicting the fault are improved.

In one embodiment, the blurring process, and the blurring decision is performed by a controller of the circuit breaker.

The fuzzy processing and fuzzy decision of the steps 120 and 140 can be implemented by the controller of the circuit breaker according to the specific fuzzy processing methods of the steps 121 to 122, 1221 to 1223, or 1223a to 1223e and the specific fuzzy decision method of the steps 141 to 144, to comprehensively evaluate and control the easily-heated points of each heating position of the circuit breaker, accurately analyze the type of the fault class of the circuit breaker, send instructions to perform different execution actions, thereby being convenient and quick and improving the reliability of the circuit breaker and the scientificity of fault pre-judgment.

In one embodiment, the plurality of temperature values are correspondingly acquired by a plurality of sensors.

For example, the plurality of temperature values used in the methods of step 100, step 120, step 140 and the like may be obtained by setting temperature sensors at a plurality of heating positions of the moving contact, the flexible connection line, the incoming connection terminal, the outgoing connection terminal, the measuring element, the controller and the like of the circuit breaker to perform temperature acquisition, and the acquired analog signals may be uniformly sent into the controller of the circuit breaker to perform AD conversion, converted into digital signals and calculated into a plurality of corresponding temperature values, thereby improving accuracy of judging the type of the system fault.

Referring to fig. 4, fig. 4 is a schematic diagram of a circuit breaker control device according to an embodiment of the present application, where the circuit breaker control device includes: a multipoint temperature detection module 210, a fuzzy processing module 220, and a fuzzy control module 230.

The multipoint temperature detection module 210 is configured to perform temperature detection on a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations includes: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker;

the fuzzy processing module 220 is configured to perform fuzzy processing on the plurality of temperature values to obtain a fault level of the circuit breaker;

and the fuzzy control module 230 is used for making fuzzy decision according to the fault level so as to control the circuit breaker to trip or alarm.

Alternatively, the blur processing module 220 may be configured to:

judging the heating grades corresponding to the heating positions according to the temperature values; wherein the heating level includes a general temperature level, a general heating level, and a severe heating level; the temperature value corresponding to the general temperature grade is smaller than the first experience threshold, the temperature value corresponding to the general heating grade is between the first experience threshold and the second experience threshold, and the temperature value corresponding to the serious heating grade is larger than the second experience threshold;

And determining the fault level of the circuit breaker according to the heat generation levels of the plurality of heat generation positions.

Alternatively, the blur processing module 220 may be configured to:

arranging the heating positions in descending order according to the temperature values to obtain an arrangement result;

judging whether the arrangement result meets the preset temperature sequence or not to obtain a judgment result; the measuring element comprises a transformer, a shunt and a Hall element, and the preset temperature sequence is as follows: the device comprises a moving contact, a shunt, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a transformer or a Hall element and a controller;

and determining the fault level of the circuit breaker according to the judging result and the heating level.

Optionally, the plurality of heat generating locations includes: at least one of a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; the blur handling module 220 may be configured to:

if the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is the common temperature level, judging that the fault level of the circuit breaker is normal;

if the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is a serious heating level, judging that the fault level of the circuit breaker is a special fault;

If the arrangement result meets the preset temperature sequence and the heating level of the moving contact and the fixed contact is the common heating level, judging that the fault level of the circuit breaker is the common fault;

if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the movable contact is a serious heating level, judging that the fault level of the circuit breaker is a general fault;

if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the movable contact is a common heating level, the fault level of the circuit breaker is judged to be an alarm.

Alternatively, the fuzzy control module 230 may be configured to:

if the fault level is normal, sending an action command to control the breaker not to trip and not to alarm;

if the fault level is an alarm, sending an action instruction to control the circuit breaker to alarm;

if the fault level is a general fault, sending an action command to control the circuit breaker to carry out delay tripping;

and if the fault level is a special fault, sending an action command to control the breaker to trip immediately.

Optionally, the blurring process, and the blurring decision are performed by a controller of the circuit breaker.

Optionally, the plurality of temperature values are acquired correspondingly by a plurality of sensors.

Referring to fig. 5, fig. 5 is a block schematic diagram of an electronic device. The electronic device 300 may include a memory 311, a memory controller 312, a processor 313, a peripheral interface 314, an input output unit 315, a display unit 316. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 5 is merely illustrative and is not intended to limit the configuration of the electronic device 300. For example, electronic device 300 may also include more or fewer components than shown in FIG. 5, or have a different configuration than shown in FIG. 5.

The above-mentioned memory 311, memory controller 312, processor 313, peripheral interface 314, input/output unit 315, and display unit 316 are electrically connected directly or indirectly to each other to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The processor 313 is used to execute executable modules stored in the memory.

The Memory 311 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-Only Memory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc. The memory 311 is configured to store a program, and the processor 313 executes the program after receiving an execution instruction, and a method executed by the electronic device 300 defined by the process disclosed in any embodiment of the present application may be applied to the processor 313 or implemented by the processor 313.

The processor 313 may be an integrated circuit chip having signal processing capabilities. The processor 313 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (digital signal processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The peripheral interface 314 couples various input/output devices to the processor 313 and the memory 311. In some embodiments, the peripheral interface 314, the processor 313, and the memory controller 312 may be implemented in a single chip. In other examples, they may be implemented by separate chips.

The input/output unit 315 is used for providing input data to a user. The input/output unit 315 may be, but is not limited to, a mouse, a keyboard, and the like.

The display unit 316 provides an interactive interface (e.g., a user interface) between the electronic device 300 and a user for reference. In this embodiment, the display unit 316 may be a liquid crystal display or a touch display. The liquid crystal display or the touch display may display a process of executing the program by the processor.

The electronic device 300 in the present embodiment may be used to perform each step in each method provided in the embodiments of the present application.

Furthermore, the embodiments of the present application also provide a computer readable storage medium, on which a computer program is stored, which when being executed by a processor performs the steps in the above-described method embodiments.

The computer program product of the above method provided in the embodiments of the present application includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to perform steps in the above method embodiment, and specifically, reference may be made to the above method embodiment, which is not described herein.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, and the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

It should be noted that the functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM) random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In this document, relational terms such as first and second, and the like may be 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.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A circuit breaker control method, the method comprising:

detecting the temperature of a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations comprises: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker;

performing fuzzy processing on the plurality of temperature values to obtain the fault grade of the circuit breaker;

and carrying out fuzzy decision according to the fault level so as to control the breaker to trip or alarm.

2. The method of claim 1, wherein blurring the plurality of temperature values to obtain a fault level of the circuit breaker comprises:

judging the heating grades corresponding to a plurality of heating positions according to the plurality of temperature values; wherein the heating level includes a general temperature level, a general heating level, and a severe heating level; the temperature value corresponding to the general heating grade is smaller than a first experience threshold, the temperature value corresponding to the general heating grade is between the first experience threshold and a second experience threshold, and the temperature value corresponding to the serious heating grade is larger than the second experience threshold;

And determining the fault level of the circuit breaker according to the heat generation levels of the plurality of heat generation positions.

3. The method of claim 2, wherein determining the fault level of the circuit breaker based on the heat generation levels of the plurality of heat generation locations comprises:

arranging the heating positions in descending order according to the temperature values to obtain an arrangement result;

judging whether the arrangement result meets a preset temperature sequence or not to obtain a judgment result; the measuring element comprises a transformer, a shunt and a Hall element, and the preset temperature sequence is as follows: the device comprises a moving contact, a shunt, an incoming line connecting terminal or an outgoing line connecting terminal, a flexible connecting wire, a transformer or a Hall element and a controller;

and determining the fault level of the circuit breaker according to the judging result and the heating level.

4. The method of claim 3, wherein the plurality of heat generating locations comprises: at least one of a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker; and determining the fault level of the circuit breaker according to the judging result and the heating level, wherein the determining comprises the following steps:

If the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a common temperature level, judging that the fault level of the circuit breaker is normal;

if the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a serious heating level, judging that the fault level of the circuit breaker is a special fault;

if the arrangement result meets a preset temperature sequence and the heating level of the moving contact and the fixed contact is a common heating level, judging that the fault level of the circuit breaker is a common fault;

if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the moving contact is a serious heating level, judging that the fault level of the circuit breaker is a general fault;

and if the arrangement result does not meet the preset temperature sequence and the heating level of any one of the rest heating positions except the moving contact is a common heating level, judging that the fault level of the circuit breaker is an alarm.

5. The method of claim 1, wherein said making a fuzzy decision to control the circuit breaker to trip or alarm based on the fault level comprises:

If the fault level is normal, sending an action command to control the breaker not to trip and not to alarm;

if the fault level is an alarm, sending an action instruction to control the circuit breaker to alarm;

if the fault grade is a general fault, sending an action instruction to control the circuit breaker to carry out delay tripping;

and if the fault level is a special fault, sending an action command to control the breaker to trip immediately.

6. The method of any of claims 1-5, wherein the blurring process, and blurring decision, is performed by a controller of a circuit breaker.

7. The method of any one of claims 1-5, wherein the plurality of temperature values are acquired by a plurality of sensors.

8. A circuit breaker control apparatus, the apparatus comprising:

the multipoint temperature detection module is used for detecting the temperatures of a plurality of heating positions of the circuit breaker to obtain a plurality of temperature values; wherein the plurality of heat generating locations comprises: at least two of a moving contact, a flexible connecting wire, an incoming wire connecting terminal, an outgoing wire connecting terminal, a measuring element and a controller of the circuit breaker;

The fuzzy processing module is used for performing fuzzy processing on the plurality of temperature values to obtain the fault grade of the circuit breaker;

and the fuzzy control module is used for making fuzzy decisions according to the fault level so as to control the circuit breaker to trip or alarm.

9. An electronic device, comprising: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method of any of claims 1 to 7 when the electronic device is run.

10. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of claims 1 to 7.