Online monitoring system and method for outlet switch arc extinguish chamber

Abstract

The invention relates to an outlet switch arc extinguish chamber online monitoring system and method. The outlet switch arc extinguish chamber on-line monitoring system comprises an in-situ detection module and a background monitoring module, the in-situ detection module is installed on a generator outlet switch device, the in-situ detection module comprises a detection unit and a first connection assembly, and the detection unit is electrically connected with the first connection assembly. The detection unit is used for obtaining a heat distribution image, a real-time image, a current value, an environment temperature value and an environment humidity value of the motor outlet switch. The background monitoring module comprises a calculation unit and a second connecting assembly, the first connecting assembly is connected with the second connecting assembly, and the calculation unit is connected with the second connecting assembly and used for recording and processing the temperature value, the current value, the environment temperature value and the environment humidity value of the generator outlet switch. The outlet switch arc extinguish chamber on-line monitoring system and method provided by the invention have the advantages of improving the safety and improving the intelligence of equipment.

Description

Technical Field

[0001] This application relates to the technical field of generator equipment, and particularly to an on-line monitoring system and method for the arc extinction chamber of an outlet switch. Background Art

[0002] The generator outlet switch equipment is a device widely used in the power system and plays an important role in the power system. The generator outlet switch equipment undertakes important functions such as opening and closing power lines, protecting against line faults, and monitoring power consumption data.

[0003] The high-voltage switch of the generator outlet switch equipment needs to operate with large current for a long time. After a long time of operation, the main contacts and arc contacts will age. Multiple make-and-break vibrations between the main contacts and arc contacts easily lead to poor contact of the contacts, resulting in an increase in the contact resistance at the make-and-break point, causing the generator outlet switch equipment to heat up during operation. Since the operating environment of the generator outlet switch equipment is fully enclosed, with a narrow internal space and high voltage, it is impossible to perform manual measurement. When the temperature accumulates for a long time, accidents such as fire and explosion will eventually occur, having the defects of great potential safety hazards and low intelligence level. Summary of the Invention

[0004] Based on this, in view of the problems of great potential safety hazards and low intelligence level of the generator outlet switch equipment, it is necessary to provide an on-line monitoring system and method for the arc extinction chamber of the generator outlet switch equipment.

[0005] In a first aspect, an on-line monitoring system for the arc extinction chamber of an outlet switch is provided, including:

[0006] A local detection module, which is installed on the generator outlet switch equipment. The local detection module includes a detection unit, a first connection component, and a touch display. The detection unit is electrically connected to the touch display, and the detection unit is electrically connected to the first connection component. The detection unit is used to obtain the heat distribution image, real-time image, current value, ambient temperature value, and ambient humidity value of the motor outlet switch; and

[0007] A background monitoring module, which includes a calculation unit and a second connection component. The first connection component is connected to the second connection component, and the calculation unit is connected to the second connection component. The calculation unit is used to record and process the temperature value, current value, ambient temperature value, and ambient humidity value of the generator outlet switch.

[0008] In one embodiment, the detection unit includes a thermal imaging sensor and an ambient temperature and humidity sensor. Both the thermal imaging sensor and the ambient temperature and humidity sensor are connected to the computing unit. The thermal imaging sensor is arranged corresponding to the generator outlet switch and is used to obtain the heat distribution image and real-time image of the generator outlet switch. The ambient temperature and humidity sensor is installed inside the generator outlet switch device and is used to obtain the ambient temperature value and ambient humidity value inside the generator outlet switch device.

[0009] In one embodiment, the detection unit further includes a current sensor and a working condition sensor. Both the current sensor and the working condition sensor are connected to the computing unit. Both the current sensor and the working condition sensor are connected to the generator outlet switch, and are used to obtain the load current value of the generator outlet switch.

[0010] In one embodiment, the background monitoring module further includes a storage unit and a background monitoring screen. The storage unit is connected to the thermal imaging sensor through the first connection component and the second connection component, and is used to store the real-time image information of the motor outlet switch. Both the computing unit and the storage unit are connected to the background monitoring screen.

[0011] In one embodiment, the first connection component includes a first fiber optic switch and a first fiber optic splicing box. The first fiber optic switch is connected to the detection unit and is connected to the first fiber optic splicing box. The second connection component includes a second fiber optic switch and a second fiber optic splicing box. The second fiber optic switch is connected to the computing unit, and the first fiber optic splicing box is connected to the second fiber optic splicing box through an optical fiber.

[0012] In a second aspect, an on-line monitoring method for the arc extinguishing chamber of the outlet switch is further provided, including the following steps:

[0013] Obtain the heat distribution image of the generator outlet switch according to the sampling period;

[0014] Obtain the ambient temperature value and ambient humidity value inside the arc extinguishing chamber according to the working condition of the outlet switch;

[0015] Obtain the load current value of the generator outlet switch;

[0016] Calculate the temperature value of each temperature measurement point of the outlet switch according to the heat distribution image;

[0017] Generate the temperature curve of each temperature measurement point of the outlet switch according to the continuously calculated temperature values;

[0018] Judge whether to issue an over-temperature alarm according to the ambient temperature value, load current value, status of the alarm switch, and temperature curves of each temperature measurement point.

[0019] In one embodiment, in the step of judging whether to issue an alarm, the following steps are further included:

[0020] Judge whether there is a situation of temperature exceeding the limit or temperature rising too fast. If there is any one of the situations of temperature exceeding the limit or temperature rising too fast, output an over-temperature signal;

[0021] Judge whether the load current value exceeds the over-temperature starting current value. If the load exceeds the over-temperature starting current value, output a current valid signal;

[0022] When the system obtains both the over-temperature signal and the current valid signal, output an over-temperature alarm.

[0023] In one embodiment, judging the situation of temperature exceeding the limit further includes the following steps:

[0024] Judge whether the temperature values of each temperature measurement point of the outlet switch for 5 consecutive samplings are greater than the over-temperature threshold. If the temperature values of 5 consecutive samplings are all greater than the over-temperature threshold, output a temperature exceeding the limit signal;

[0025] Judge whether the temperature alarm switch is turned on. If the temperature alarm switch is turned on, output a temperature alarm on signal;

[0026] When the system obtains both the temperature exceeding the limit signal and the temperature alarm on signal, it is judged that there is a situation of temperature exceeding the limit.

[0027] In one embodiment, judging the situation of temperature rising too fast further includes the following steps:

[0028] Judge whether the temperature rise of each temperature measurement point of the outlet switch for 5 consecutive samplings is greater than the temperature rise threshold. If the temperature rise of 5 consecutive samplings is all greater than the temperature rise threshold, output a temperature rising too fast signal;

[0029] Judge whether the temperature rise alarm switch is turned on. If the temperature rise alarm switch is turned on, output a temperature rise alarm on signal;

[0030] When the system obtains both the temperature rising too fast signal and the temperature rise alarm on signal, it is judged that there is a situation of temperature rising too fast.

[0031] In one embodiment, calculating the temperature rise of each temperature measurement point of the outlet switch includes the following steps:

[0032] Subtract the ambient temperature value from the temperature value of each temperature measurement point of the outlet switch to obtain the temperature rise of each temperature measurement point of the outlet switch.

[0033] The above-mentioned on-line monitoring system and method for the arc extinguishing chamber of the outlet switch detect various data of the outlet switch of the generator by setting the in-situ detection module on the outlet switch of the generator, so as to obtain the current value, ambient temperature value and ambient humidity value of the outlet switch, and obtain the heat distribution image and image information of the outlet switch. The detection unit transmits the acquired data to the background monitoring module through the first connection component and the second connection component. The calculation unit processes and analyzes the acquired data and issues an alarm when the outlet switch is overheated, so as to timely detect the situation of overheating caused by poor contact of the outlet switch, and avoid accidents such as fire or explosion caused by long-term heat accumulation, which has the advantages of improving safety and improving the intelligence of the equipment. Brief Description of the Drawings

[0034] Figure 1 It is a schematic structural diagram of the on-line monitoring system for the arc extinguishing chamber of the outlet switch described in the embodiment of the present application.

[0035] Figure 2 It is a schematic structural diagram of the detection unit of the on-line monitoring system for the arc extinguishing chamber of the outlet switch described in the embodiment of the present application.

[0036] Figure 3 It is a schematic structural diagram of the first connection component and the second connection component of the on-line monitoring system for the arc extinguishing chamber of the outlet switch described in the embodiment of the present application.

[0037] Figure 4 It is a flowchart of the on-line monitoring method for the arc extinguishing chamber of the outlet switch described in the embodiment of the present application.

[0038] Reference Numerals in the Drawings: 100, in-situ detection module; 110, detection unit; 111, thermal imaging sensor; 112, ambient temperature and humidity sensor; 113, current sensor; 114, working condition sensor; 120, touch display; 130, first connection component; 131, first optical fiber switch; 132, first optical fiber splicing box;

[0039] 200, background monitoring module; 210, calculation unit; 220, storage unit; 230, background monitoring screen; 240, second connection component; 241, second optical fiber switch; 242, second optical fiber splicing box. Detailed Description of the Embodiment

[0040] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application will be made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application.

[0042] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present application, unless otherwise clearly specified and limited, if terms such as "mounted", "connected", "coupled", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0046] Referring to Figure 1 , Figure 1 FIG. shows a schematic structural diagram of an on-line monitoring system for an outlet switch arc extinguishing chamber in an embodiment of the present application. The on-line monitoring system for an outlet switch arc extinguishing chamber provided in an embodiment of the present application can be applied to a generator outlet switch device to detect whether there is an over-temperature situation in the outlet switch and issue a warning in time when over-temperature occurs. The on-line monitoring system for an outlet switch arc extinguishing chamber includes a local detection module 100 and a background monitoring module 200. The local detection module 100 is installed on the generator outlet switch. The local detection module 100 includes a detection unit 110, a first connection component 130, and a touch display 120. The detection unit 110 is electrically connected to the touch display 120, and the detection unit 110 is electrically connected to the first connection component 130. The detection unit 110 is used to obtain the heat distribution image, real-time image, current value, ambient temperature value, and ambient humidity value of the generator outlet switch. The background monitoring module 200 includes a calculation unit 210 and a second connection component 240. The first connection component 130 and the second connection component 240 are connected, and the calculation unit 210 is connected to the second connection component 240. The calculation unit 210 is used to record and process the temperature value, current value, ambient temperature value, and ambient humidity value of the generator outlet switch.

[0047] For the generator outlet switch system described in the embodiment itself, by disposing the local detection module 100 on the generator outlet switch, the detection unit 110 detects various data of the generator outlet switch, so as to obtain the current value, ambient temperature value, and ambient humidity value of the outlet switch, and obtain the heat distribution image and image information of the outlet switch. The above data can also be observed in time through the touch display 120. The data obtained by the detection unit 110 is transmitted to the calculation unit 210 of the background monitoring module 200 through the first connection component 130 and the second connection component 240. The calculation unit 210 processes and analyzes the obtained data and issues an alarm when the outlet switch is over-temperature.

[0048] The generator outlet switch system described in the embodiments itself, by setting a local detection module 100 at the outlet switch of the generator, the detection unit 110 obtains various data of the outlet switch, and then transmits the data to the calculation unit 210 of the background monitoring module 200 for processing and analysis. When the over-temperature situation occurs, an alarm is issued, so as to timely detect the situation of poor contact of the outlet switch leading to over-temperature, and avoid accidents such as fire or explosion caused by long-term accumulation of heat. It has the advantages of improving safety and the intelligence of the equipment.

[0049] Combined with Figure 2 shown, Figure 2 The structural schematic diagram of the detection unit of the outlet switch arc extinguishing chamber online monitoring system in an embodiment of the present application is shown. In some embodiments, the detection unit 110 includes a thermal imaging sensor 111 and an environmental temperature and humidity sensor 112. Both the thermal imaging sensor 111 and the environmental temperature and humidity sensor 112 are connected to the calculation unit 210. The thermal imaging sensor 111 is arranged corresponding to the generator outlet switch. The thermal imaging sensor 111 is used to obtain the heat distribution image and real-time image of the generator outlet switch. The environmental temperature and humidity sensor 112 is installed inside the generator outlet switch device. The environmental temperature and humidity sensor 112 is used to obtain the environmental temperature value and environmental humidity value inside the generator outlet switch device. Specifically, the thermal imaging sensor 111 includes an infrared imaging sensor and a visible light imaging sensor. The infrared imaging sensor can obtain the heat distribution image of the outlet switch, and the visible light imaging sensor can obtain the real-time image of the outlet switch. The two can be combined to obtain a heat distribution real-time image. By setting the thermal imaging sensor 111, the heat distribution image and real-time image can be obtained, and then transmitted to the calculation unit 210. According to the heat distribution image, the temperature values of each temperature measurement point of the outlet switch can be analyzed, and the real-time image is also convenient for the staff to observe the real-time state of the outlet switch. The environmental temperature and humidity sensor 112 can detect the environmental temperature value and environmental humidity value in the arc extinguishing chamber of the generator outlet switch device. Combined with the temperature value of the outlet switch, the temperature rise situation in the arc extinguishing chamber can be calculated, and the situation of a large amount of heat accumulation in the arc extinguishing chamber can be detected in time, which has the advantage of improving the safety of the generator outlet switch device.

[0050] In an alternative embodiment, as Figure 2As shown, the detection unit 110 further includes a current sensor 113 and a working condition sensor 114. Both the current sensor 113 and the working condition sensor 114 are connected to the calculation unit 210, and both the current sensor 113 and the working condition sensor 114 are connected to the generator outlet switch. The current sensor 113 and the working condition sensor 114 are used to obtain the load current value of the generator outlet switch. By setting the current sensor 113 and the working condition sensor 114, the working state and current value of each phase of the outlet switch can be obtained in real time. By combining the current value and the temperature value for judgment, the over-temperature situation of the outlet switch can be judged more accurately, improving the accuracy of over-temperature detection.

[0051] In an alternative embodiment, as Figure 1 shown, the background monitoring module 200 further includes a storage unit 220 and a background monitoring screen 230. The storage unit 220 is connected to the thermal imaging sensor 111 through a first connection component 130 and a second connection component 240. The storage unit 220 is used to store the real-time image information of the motor outlet switch. Both the calculation unit 210 and the storage unit 220 are connected to the background monitoring screen 230. By setting the storage unit 220 to be connected to the thermal imaging sensor 111, the real-time images obtained by the thermal imaging sensor 111 can be saved, facilitating the staff to view the historical images of the outlet switch from the background monitoring screen 230. Moreover, the background monitoring screen 230 can also display the current situation of the outlet switch, such as the temperature values of each temperature measurement point of the current outlet switch, the ambient temperature value, the ambient humidity value, the temperature curves of each temperature measurement point, the load current values of each phase, the communication status, and the alarm prompt, etc., so that the staff can more conveniently understand the situation of the outlet switch, having the advantage of convenient use. It should be noted that in addition to the current temperature curve, the historical temperature curve can also be queried, facilitating the staff to understand the situation.

[0052] In an alternative embodiment, as Figure 3As shown in the figure, the first connection component 130 includes a first optical fiber switch 131 and a first optical fiber splicing box 132. The first optical fiber switch 131 is connected to the detection unit 110, and the first optical fiber switch 131 is connected to the first optical fiber splicing box 132; the second connection component 240 includes a second optical fiber switch 241 and a second optical fiber splicing box 242. The second optical fiber switch 241 is connected to the calculation unit 210, and the first optical fiber splicing box 132 is connected to the second optical fiber splicing box 242 through an optical fiber. Since the generator outlet switch is used to transmit high voltage, by setting an optical fiber connection between the on-site detection module 100 and the background monitoring module 200, the electromagnetic interference of high voltage can be avoided. This anti-interference ability enables the optical fiber to maintain stable communication between the on-site detection module 100 and the background monitoring module 200 in a complex electromagnetic environment, with the advantages of high reliability and good stability. Moreover, the optical fiber connection has the characteristics of fast transmission speed and large data transmission volume, so it can ensure the transmission speed and data volume between the on-site detection module 100 and the background monitoring module 200.

[0053] On the other hand, the embodiment of the present application also provides an on-line monitoring method for the arc extinguishing chamber of the outlet switch, as Figure 4 shown, including the following steps:

[0054] S100: Obtain the heat distribution image of the generator outlet switch according to the sampling period;

[0055] S200: Obtain the ambient temperature value and ambient humidity value in the arc extinguishing chamber according to the working condition of the outlet switch;

[0056] S300: Obtain the load current value of the generator outlet switch;

[0057] S400: Calculate the temperature value of each temperature measurement point of the outlet switch according to the heat distribution image;

[0058] S500: Generate a temperature curve for each temperature measurement point of the outlet switch according to the continuously calculated temperature values;

[0059] S600: Determine whether to issue an over-temperature alarm according to the ambient temperature value, load current value, situation of the alarm switch, and temperature curves of each temperature measurement point.

[0060] For the on-line monitoring method for the arc extinguishing chamber of the outlet switch described in the embodiment of the present application, the heat distribution image of the outlet switch is obtained through the thermal imaging sensor 111, so that the temperature value of each temperature measurement point can be obtained by processing with the calculation unit 210, and a temperature curve can also be generated according to the relationship between the temperature value and time, which is convenient for the staff to observe. The background monitoring module 200 also judges whether the outlet switch is over-temperature according to the obtained data such as temperature value, ambient temperature value, load current value, etc. If there is an over-temperature situation, the background monitoring module 200 will issue an over-temperature alarm, and the staff can discover the over-temperature situation in time.

[0061] The online monitoring method for the arc extinguishing chamber of the outlet switch described in the embodiments of the present application obtains various data of the outlet switch, and then transmits the data to the calculation unit 210 of the background monitoring module 200 for processing and analysis. When the over-temperature situation occurs, an alarm is issued, so as to timely detect the situation that the outlet switch has poor contact and causes over-temperature, and avoid accidents such as fire or explosion caused by long-term heat accumulation, which has the advantages of improving safety and the intelligence of the device.

[0062] In an alternative embodiment, in step S200, when the outlet switch is in different operating conditions of normal operation, overload operation and short-circuit fault, the ambient temperature and humidity sensor 112 adopts different strategies to obtain the ambient temperature value and ambient humidity value in the arc extinguishing chamber, so as to make the device more intelligent and the obtained data more accurate.

[0063] In an exemplary embodiment, during normal operation, the temperature in the arc extinguishing chamber is relatively stable, and the ambient temperature and humidity sensor 112 can read the temperature at fixed time intervals; under overload conditions, the temperature in the arc extinguishing chamber will rise rapidly, and the ambient temperature and humidity sensor 112 needs to be able to respond quickly to this temperature change and shorten the reading interval; short circuit is an extreme fault condition, and the temperature in the arc extinguishing chamber will rise sharply instantaneously. The ambient temperature and humidity sensor 112 needs to have an ultra-fast reading ability and be able to obtain temperature data within microseconds or even shorter time, because the time scale of temperature change during short circuit is very short, and only extremely fast reading can capture the initial temperature change.

[0064] In an alternative embodiment, the temperature measurement points of the outlet switch can be set as the A-phase knife switch, A-phase switch, B-phase knife switch, B-phase switch, C-phase knife switch and C-phase switch. Since over-temperature is common in the connection contacts between the knife switch and the switch, by setting temperature measurement points for each phase knife switch and switch of the outlet switch, it is possible to ensure the monitoring of each key connection point of the outlet switch, thereby ensuring the safety performance of the outlet switch.

[0065] In an alternative embodiment, in step S600 of judging whether to issue an alarm, the following steps are further included:

[0066] S610: Judge whether there is a temperature limit exceeding situation or a temperature rising situation. If there is any one of the temperature limit exceeding or temperature rising situations, output an over-temperature signal;

[0067] S620: Judge whether the load current value exceeds the over-temperature starting current value. If the load exceeds the over-temperature starting current value, output a current valid signal;

[0068] S630: When the system obtains both the over-temperature signal and the current valid signal, output an over-temperature alarm.

[0069] In this embodiment, to determine whether to output an over-temperature warning, it is necessary to first determine whether there is a temperature limit exceedance or a rapid temperature rise. Among them, a temperature limit exceedance means that the temperature value of any temperature measurement point of the outlet switch exceeds the over-temperature threshold, and a rapid temperature rise means that the temperature value of any temperature measurement point of the outlet switch rapidly increases within a short period of time. As long as one of the above two situations occurs, an over-temperature signal can be output. However, outputting an over-temperature signal does not mean outputting an over-temperature warning. It is also necessary to combine the load current value for judgment. Only when the load current value exceeds the over-temperature starting current value will an over-temperature warning be further output. It should be noted that the over-temperature starting current value is a manually set value. For example, when the over-temperature starting current value is set to 1 kA, an alarm will be triggered when the load current value of the outlet switch exceeds 1 kA and there is an over-temperature signal; when the over-temperature starting current value is set to 0 kA, this function is not enabled, and as long as there is an over-temperature signal, an alarm will be directly output.

[0070] In an alternative embodiment, in the step of determining the temperature limit exceedance situation, the following steps are further included:

[0071] S6111: Determine whether the temperature values of 5 consecutive samplings at each temperature measurement point of the outlet switch are greater than the over-temperature threshold. If the temperature values of 5 consecutive samplings are all greater than the over-temperature threshold, output a temperature limit exceedance signal;

[0072] S6112: Determine whether the temperature warning switch is turned on. If the temperature warning switch is turned on, output a temperature warning enabled signal;

[0073] S6113: When the system obtains both the temperature limit exceedance signal and the temperature warning enabled signal, it is determined that there is a temperature limit exceedance situation.

[0074] When this embodiment determines the temperature limit exceedance situation, each temperature measurement point samples the temperature value according to the sampling period. By judging the temperature values of 5 consecutive samplings at each temperature measurement point, if the temperature values of 5 consecutive samplings are all greater than the set over-temperature threshold, a temperature limit exceedance signal is output. However, outputting a temperature limit exceedance signal does not mean that there is a temperature limit exceedance situation. It is also necessary to combine the temperature warning switch for judgment. If the temperature warning switch is in the on state, it will be further determined that there is a temperature limit exceedance situation. If the temperature warning switch is in the off state, even if there is a temperature limit exceedance signal, it will not be determined that there is a temperature limit exceedance situation. In an exemplary embodiment, the over-temperature threshold is 80 degrees Celsius and the sampling period is 60 seconds.

[0075] In an alternative embodiment, in the step of determining the rapid temperature rise situation, the following steps are further included:

[0076] S6121: Determine whether the temperature rise of each temperature measurement point of the outlet switch in five consecutive samplings is greater than the temperature rise threshold. If the temperature rise in five consecutive samplings is greater than the temperature rise threshold, output a temperature rising signal.

[0077] S6122: Determine whether the temperature rise alarm switch is turned on. If the temperature rise alarm switch is turned on, output a temperature rise alarm activation signal.

[0078] S6123: When the system obtains both the temperature rising signal and the temperature rise alarm activation signal, it determines that there is a temperature rising situation.

[0079] When judging the temperature rising situation in this embodiment, each temperature measurement point samples the temperature value according to the sampling period, then calculates the temperature rise based on the temperature value and the ambient temperature. By judging the temperature rise in five consecutive samplings of each temperature measurement point, if the temperature rise in five consecutive samplings is greater than the set temperature rise threshold, a temperature rising signal is output. However, outputting a temperature rising signal does not necessarily mean there is a temperature rising situation. It is also necessary to combine the temperature rise alarm switch for judgment. If the temperature rise alarm switch is in the on state, it will be further judged as a temperature rising situation. If the temperature rise alarm switch is in the off state, even if there is a temperature rising signal, it will not be judged as a temperature rising situation. In an exemplary embodiment, the temperature rise threshold is 60 degrees Celsius and the sampling period is 60 seconds.

[0080] In an alternative embodiment, calculating the temperature rise of each temperature measurement point of the outlet switch includes the following steps:

[0081] Obtain the temperature rise of each temperature measurement point of the outlet switch by subtracting the ambient temperature value from the temperature value of each temperature measurement point of the outlet switch.

[0082] In this embodiment, the temperature rise value of each temperature measurement point is calculated by the difference between the temperature value of each temperature measurement point of the outlet switch and the ambient temperature value. That is to say, if the temperature value of each temperature measurement point increases in a short period of time, since the change of the ambient temperature is slower than the change of the temperature value, the difference between the two will be enlarged, thus exceeding the temperature rise threshold.

[0083] The online monitoring system and method for the arc extinguishing chamber of the outlet switch described in the embodiments of the present application have the following beneficial effects:

[0084] 1. By setting the on-site detection module 100 at the outlet switch of the generator, the detection unit 110 obtains various data of the outlet switch, and then transmits the data to the calculation unit 210 of the background monitoring module 200 for processing and analysis, and issues an alarm when an over-temperature situation occurs, so as to timely detect the situation of over-temperature caused by poor contact of the outlet switch, and avoid accidents such as fire or explosion caused by long-term accumulation of heat, having the advantages of improving safety and improving the intelligence of the equipment.

[0085] 2. By setting the current sensor 113 and the working condition sensor 114, the working state and current value of each phase of the outlet switch can be obtained in real time. By combining the judgment of the current value and the temperature value, the over-temperature condition of the outlet switch can be judged more accurately, improving the accuracy of over-temperature detection.

[0086] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0087] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An on-line monitoring system for the arc extinguishing chamber of an outlet switch, characterized in that, Including: An on-site detection module (100), the on-site detection module (100) is installed on the generator outlet switchgear. The on-site detection module (100) includes a detection unit (110), a first connection component (130), and a touch display (120). The detection unit (110) is electrically connected to the touch display (120), and the detection unit (110) is electrically connected to the first connection component (130). The detection unit (110) is used to obtain the heat distribution image, real-time image, current value, ambient temperature value, and ambient humidity value of the motor outlet switch. And A background monitoring module (200), the background monitoring module (200) includes a calculation unit (210) and a second connection component (240). The first connection component (130) is connected to the second connection component (240), and the calculation unit (210) is connected to the second connection component (240). The calculation unit (210) is used to record and process the temperature value, current value, ambient temperature value, and ambient humidity value of the generator outlet switch.

2. The on-line monitoring system for the outlet switch arc extinguishing chamber according to claim 1, characterized in that: The detection unit (110) includes a thermal imaging sensor (111) and an ambient temperature and humidity sensor (112). Both the thermal imaging sensor (111) and the ambient temperature and humidity sensor (112) are connected to the calculation unit (210). The thermal imaging sensor (111) is arranged corresponding to the generator outlet switch. The thermal imaging sensor (111) is used to obtain the heat distribution image and real-time image of the generator outlet switch. The ambient temperature and humidity sensor (112) is installed inside the generator outlet switchgear. The ambient temperature and humidity sensor (112) is used to obtain the ambient temperature value and ambient humidity value inside the generator outlet switchgear.

3. The on-line monitoring system for the outlet switch arc extinguishing chamber according to claim 2, characterized in that: The detection unit (110) further includes a current sensor (113) and a working condition sensor (114). Both the current sensor (113) and the working condition sensor (114) are connected to the calculation unit (210). Both the current sensor (113) and the working condition sensor (114) are connected to the generator outlet switch. The current sensor (113) and the working condition sensor (114) are used to obtain the load current value of the generator outlet switch.

4. The on-line monitoring system for the outlet switch arc extinguishing chamber according to claim 2, characterized in that: The background monitoring module (200) further includes a storage unit (220) and a background monitoring screen (230). The storage unit (220) is connected to the thermal imaging sensor (111) through the first connection component (130) and the second connection component (240). The storage unit (220) is used to store the real-time image information of the motor outlet switch. Both the calculation unit (210) and the storage unit (220) are connected to the background monitoring screen (230).

5. The on-line monitoring system for the arc extinguishing chamber of the outlet switch according to claim 1, characterized in that: The first connection component (130) includes a first optical fiber switch (131) and a first optical fiber splicing box (132). The first optical fiber switch (131) is connected to the detection unit (110), and the first optical fiber switch (131) is connected to the first optical fiber splicing box (132). The second connection component (240) includes a second optical fiber switch (241) and a second optical fiber splicing box (242). The second optical fiber switch (241) is connected to the calculation unit (210), and the first optical fiber splicing box (132) is connected to the second optical fiber splicing box (242) through an optical fiber.

6. An on-line monitoring method for the arc extinguishing chamber of an outlet switch, characterized in that, It includes the following steps: Obtain the heat distribution image of the outlet switch of the generator according to the sampling period; Obtain the ambient temperature value and ambient humidity value in the arc extinguishing chamber according to the working condition of the outlet switch; Obtain the load current value of the generator outlet switch; Calculate the temperature values of each temperature measurement point of the outlet switch according to the heat distribution image; Generate a temperature curve for each temperature measurement point of the outlet switch according to the continuously calculated temperature values; Judge whether to issue an over-temperature alarm according to the ambient temperature value, load current value, situation of the alarm switch, and temperature curves of each temperature measurement point.

7. The on-line monitoring method for the arc extinguishing chamber of the outlet switch according to claim 6, wherein In the step of judging whether to issue an alarm, it further includes the following steps: Judge whether there is a situation of temperature exceeding the limit or temperature rising. If there is any one of the situations of temperature exceeding the limit or temperature rising, an over-temperature signal is output; Judge whether the load current value exceeds the over-temperature starting current value. If the load exceeds the over-temperature starting current value, a current valid signal is output; When the system obtains two signals, namely the over-temperature signal and the current valid signal, an over-temperature alarm is output.

8. The on-line monitoring method for the arc extinguishing chamber of the outlet switch according to claim 7, characterized in that, In the step of judging the situation of temperature exceeding the limit, it further includes the following steps: Judge whether the temperature values of each temperature measurement point of the outlet switch for 5 consecutive samplings are greater than the over-temperature threshold. If the temperature values of 5 consecutive samplings are all greater than the over-temperature threshold, a temperature exceeding the limit signal is output; Judge whether the temperature alarm switch is turned on. If the temperature alarm switch is turned on, a temperature alarm on signal is output; When the system obtains two signals, namely the temperature exceeding the limit signal and the temperature alarm on signal, it is judged that there is a situation of temperature exceeding the limit.

9. The on-line monitoring method for the arc extinguishing chamber of the outlet switch according to claim 7, characterized in that In the step of judging the situation of temperature rising, it further includes the following steps: Judge whether the temperature rise of each temperature measurement point of the outlet switch for 5 consecutive samplings is greater than the temperature rise threshold. If the temperature rise of 5 consecutive samplings is all greater than the temperature rise threshold, a temperature rising signal is output; Judge whether the temperature rise alarm switch is turned on. If the temperature rise alarm switch is turned on, a temperature rise alarm on signal is output; When the system obtains two signals, namely the temperature rising signal and the temperature rise alarm on signal, it is judged that there is a situation of temperature rising.

10. The on-line monitoring method for the arc extinguishing chamber of the outlet switch according to claim 9, characterized in that Calculating the temperature rise of each temperature measurement point of the outlet switch includes the following steps: Subtract the ambient temperature value from the temperature value of each temperature measurement point of the outlet switch to obtain the temperature rise of each temperature measurement point of the outlet switch.

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