CN108444660B - Nitrogen leakage fault diagnosis method, device and system - Google Patents

Abstract

The invention is applicable to the technical field of electrical equipment maintenance, and provides a nitrogen leakage fault diagnosis method, device and system. The method includes: acquiring level change information of each preset test point, and the level change information includes the level change time. and high level duration; when the circuit breaker issues a nitrogen leakage fault alarm, obtain the level status of each preset test point at the alarm time; determine the level change time and high level duration of each preset test point Preset the sequence of level changes at each test point and the time interval of level changes; according to the preset sequence of level changes of each test point, the time interval of level changes, and the level status at the alarm moment, and The preset fault type characteristic information determines the nitrogen leakage fault type of the circuit breaker. The invention can quickly determine the fault type, locate the fault location, shorten the maintenance cycle, and greatly improve the maintenance efficiency.

Description

Nitrogen leakage fault diagnosis method, device and system

technical field

The invention belongs to the technical field of electrical equipment maintenance, and in particular relates to a nitrogen leakage fault diagnosis method, device and system.

Background technique

High-voltage circuit breakers are the most important electrical components in the power grid, and play a control and protection role in the power grid. Taking Siemens 3AQ1EG circuit breaker as an example, this type of circuit breaker uses SF6 gas as the insulating and arc extinguishing medium of the compressed gas type high-voltage circuit breaker, and is equipped with a hydraulic nitrogen operating mechanism. Advantages, it is widely used in the switching of reactive power compensation devices such as reactors and capacitors in the power grid. However, the statistical data used in the field show that nitrogen leakage is a frequent fault of this type of circuit breaker. When a nitrogen leakage fault occurs in the circuit breaker, the circuit breaker will issue a nitrogen leakage alarm signal. At present, manual maintenance is usually used to determine the circuit breaker. The type of nitrogen leakage fault has long maintenance cycle and low efficiency.

SUMMARY OF THE INVENTION

In view of this, embodiments of the present invention provide a method, device and system for diagnosing nitrogen leakage faults, so as to solve the problems in the prior art that the type of nitrogen leakage faults of circuit breakers are determined by manual maintenance, and the maintenance period is long and the efficiency is low. .

To achieve the above purpose, a first aspect of the embodiments of the present invention provides a method for diagnosing nitrogen leakage faults, including:

If the level of one of the preset test points in the circuit breaker control circuit changes, acquire the level change information of each preset test point, where the level change information includes a level change time and a high level duration;

When the circuit breaker issues a nitrogen leakage fault alarm, obtain the level state of each preset test point at the alarm moment;

According to the preset level change time and high level duration of each test point, determine the sequence of the preset level change and the time interval of the level change;

The nitrogen leakage fault type of the circuit breaker is determined according to the preset sequence of level changes at each test point, the time interval of level changes and the level state at the alarm moment, as well as the preset fault type characteristic information.

Further, the acquiring the level change information of each preset test point includes:

The level change information of each preset test point is acquired through the clock module, and the level change information is stored in the storage module.

Further, according to the preset sequence of level changes at each test point, the time interval of level changes, the level state at the alarm moment, and the preset fault type characteristic information, determine the nitrogen gas of the circuit breaker. Types of leak failures include:

Match the preset sequence of level changes, the time interval of level changes, and the level state at the alarm moment with the preset fault type information, respectively, to determine the successfully matched fault type.

Further, the nitrogen leakage fault diagnosis method also includes:

Obtain the alarm time of the nitrogen leakage fault alarm of the circuit breaker through the clock module;

The nitrogen leakage fault type and the alarm time are stored in the storage module, and sent to the display module for display.

A second aspect of the embodiments of the present invention provides a nitrogen leakage fault diagnosis device, including:

The first acquisition unit is configured to acquire level change information of each preset test point if the level of one of the preset test points in the circuit breaker control circuit changes, where the level change information includes electrical power. The time of level change and the duration of high level;

The second obtaining unit, when the circuit breaker issues a nitrogen leakage fault alarm, obtains the level state of each preset test point at the alarm moment;

The information determination unit is used to determine the sequence of the preset level changes and the time interval of the level changes according to the preset level change time and high level duration of each test point;

The fault type determination unit is used to determine the circuit breaker according to the preset sequence of the level changes of each test point, the time interval of the level changes and the level state at the alarm moment, as well as the preset fault type characteristic information type of nitrogen leak failure.

Further, the first obtaining unit includes:

The information storage unit is used for acquiring the level change information of each preset test point through the clock module, and storing the level change information in the storage module.

Further, the failure type determination unit includes:

The information matching unit is used to match the preset sequence of level changes, the time interval of level changes, and the level status at the alarm moment with the preset fault type information respectively, and determine the faults that are successfully matched type.

A third aspect of the embodiments of the present invention provides a nitrogen leakage fault diagnosis system, including a test module and a processor;

The test module, connected to the processor, is used to collect the level change information of each preset test point in the circuit breaker control circuit, the level change information includes the level change time and the high level duration, and also It is used to collect the level state of each preset test point at the moment when the circuit breaker issues an alarm for nitrogen leakage fault;

The processor is configured to obtain the level change information of each preset test point through the test module if the level of one of the preset test points in the circuit breaker control circuit changes; When the circuit breaker issues a nitrogen leakage fault alarm, the test module obtains the level state of each preset test point at the alarm time; according to the preset level change time and high level duration of each test point, the preset level status of each test point is determined. The sequence of level changes of test points and the time interval of level changes; according to the preset sequence of level changes of each test point, the time interval of level changes and the level state at the time of alarm, and the preset The fault type characteristic information determines the nitrogen leakage fault type of the circuit breaker.

Further, the nitrogen leakage fault diagnosis system further includes a storage module, and the test module includes a clock module;

The processor is connected to the storage module and the clock module, respectively, and is further configured to acquire the level change information of each test point through the clock module, and store the level change information in the storage module.

A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the method for diagnosing a nitrogen leak fault of the first aspect above .

Compared with the prior art, the embodiment of the present invention has the beneficial effect that if the level of one of the preset test points in the circuit breaker control circuit changes, the level change information of each preset test point is acquired, It can effectively monitor the dynamics of the circuit breaker control circuit, and accurately control the level change information of each test point; when the circuit breaker issues a nitrogen leakage fault alarm, obtain the preset level status of each test point at the alarm time, so as to facilitate the analysis of the fault type. Carry out analysis; according to the preset level change time and high level duration of each test point, determine the sequence of the preset level changes and the time interval of the level change, and according to the preset level changes of each test point The sequence of level changes, the time interval of level changes and the level status at the alarm time, as well as the preset fault type characteristic information, determine the nitrogen leakage fault type of the circuit breaker, and realize the automatic diagnosis of nitrogen leakage fault, which can Quickly determine the fault type, locate the fault location, shorten the maintenance cycle, and greatly improve the maintenance efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic flowchart of a method for diagnosing nitrogen leakage faults provided by an embodiment of the present invention;

Fig. 2 is a logic simplified diagram of a high-voltage circuit breaker control circuit;

3 is a sequence diagram of each test point preset in a Class I fault provided by an embodiment of the present invention;

4 is a sequence diagram of each test point preset in a Class II fault provided by an embodiment of the present invention;

5 is a sequence diagram of each test point preset in a Class III fault provided by an embodiment of the present invention;

Fig. 6 is the timing chart of each test point preset in the IV class fault provided by the embodiment of the present invention;

Fig. 7 is the timing chart of each test point preset in the V-type fault provided by the embodiment of the present invention;

8 is a sequence diagram of each preset test point in a Class VI fault provided by an embodiment of the present invention;

9 is a sequence diagram of each test point preset in a Class VII fault provided by an embodiment of the present invention;

10 is a schematic structural diagram of a nitrogen leakage fault diagnosis device provided by an embodiment of the present invention;

11 is a schematic structural diagram of a nitrogen leakage fault diagnosis system provided by an embodiment of the present invention;

12 is a schematic structural diagram of a nitrogen leakage fault diagnosis system provided by another embodiment of the present invention.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to illustrate the technical solutions of the present invention, the following specific embodiments are used for description.

Referring to FIG. 1 , a first aspect of the embodiment of the present invention provides a method for diagnosing nitrogen leakage faults, including:

S101, if the level of one of the preset test points in the circuit breaker control circuit changes, obtain level change information of each preset test point, where the level change information includes a level change time and a high level Level duration.

Specifically, taking Siemens 3AQ1EG circuit breaker as an example, FIG. 2 is a simplified logic diagram of a control circuit of this type of circuit breaker, including an oil pump control circuit 201, a nitrogen blocking circuit 202 and a nitrogen leakage alarm circuit 203, wherein each relay and switch Nodes have specific labels in the prior art, and those skilled in the art should understand that B1-P is a pressure switch, with two groups of B1-P/(1, 2, 3) and B1-P/(4, 5, 6) Switch node; K15 is the pressing delay time relay, its three connection terminals are represented by A1, A2 and B1 respectively, and the switching node is represented as K15/(15, 16, 18); K9 is the motor pressing relay, and its two connection terminals They are represented by A1 and A2 respectively, and the switch node is represented by K9/(43, 44); K67 is the overtime time relay for suppressing, and its two connection terminals are represented by A1 and A2 respectively, and the switch node is represented by K67/(15, 16, 18 ); K81 is a nitrogen leakage relay, its two connection ends are represented by A1 and A2 respectively, with K81/(4, 5, 6), K81/(7, 8, 9) and K81/(10, 11, 12) Three groups of switch nodes; K182 is a nitrogen leakage alarm relay, and its two connection terminals are represented by A1 and A2 respectively, with two groups of switch nodes K182/(33, 34) and K182/(43, 44); K14 is a time relay, Its two connection ends are represented by A1 and A2 respectively; K is the blocking node; S4 is the reset button, and its switch node is represented as S4/(11, 12). A, B, C, D, E and F are preset six test points, and the level change information of each test point can reflect the action changes of different relays or switch nodes in the circuit. If the level of one of the test points changes, it indicates that the corresponding relay in the circuit has acted (on or off), and there is a risk of nitrogen leakage. At this time, the power of each test point can be obtained through the clock module. Level change information, the level change information here includes the level change time and high level duration of each test point, which is used to judge the fault type when a nitrogen leakage fault occurs. In addition, since the actions of each relay are not completed synchronously, It takes a certain amount of time to obtain the level change information of each test point. The acquired level change information can be stored in the storage module first, which can effectively monitor the dynamics of the circuit breaker control circuit and accurately control the level change information of each test point.

S102, when the circuit breaker issues a nitrogen leakage fault alarm, obtain the level state of each preset test point at the alarm moment.

Specifically, when the F test point is at a high level, the circuit breaker performs a nitrogen leakage fault alarm, and the level status of each test point at the alarm moment can be obtained through the level status detection module, so that the status of each relay in the circuit at the alarm moment can be determined. The on-off state is easy to analyze the fault type, and the acquired level state can be stored in the storage module first.

S103, according to the preset level change moment and high level duration of each test point, determine the sequence of preset level changes and the time interval of level changes at each preset test point.

Specifically, the level change time and high level duration of each test point are retrieved from the storage module, and the sequence of level changes and the time interval of level changes at each test point can be obtained, that is, the corresponding relays are determined. The sequence of generating actions, the time interval of level change here can be the time interval of two level change moments in the same test point, or the time interval of two level change moments in different test points.

S104: Determine the nitrogen leakage fault type of the circuit breaker according to the preset sequence of the level change at each test point, the time interval of the level change, the level state at the alarm moment, and the preset fault type feature information .

Table 1 Fault type characteristic information table

Description: 1. ↑ means high level, ↓ means low level;

2. A corresponds to B1-P/1 collection, B corresponds to K9/A1 collection, C corresponds to K9/44 collection, D corresponds to K81/A1 collection, E corresponds to K182/A1 collection, and F corresponds to K182/44 collection quantity;

3. Class I failure is a hard failure of nitrogen leakage;

Type II failure is the pressure switch B1-P/(1,2) node bonding;

Class III fault is the failure of the suppression delay time relay K15/(15, 18) node to be turned on;

Class IV fault is the misconnection of the pressure switch B1-P/(4, 6) node;

Class V fault is the nitrogen leakage alarm relay K182/(33, 34) node is misconnected;

Category VI fault is the failure of the nitrogen leakage relay K81/(7, 8) node or the nitrogen leakage alarm relay K182/(23, 24) node to be misconnected;

Type VII fault is that the delay time is too long or the K15/(15, 18) node is glued after the voltage delay time relay K15 is powered off.

Among them, Type I faults are hard faults, and Types II, III, IV, V, VI and VII faults are soft faults. If it is finally determined that the fault type is a soft fault, the staff can perform maintenance through a specific circuit to avoid power outage maintenance. Significant impact on daily life and industrial production.

Referring to Figure 3 to Figure 9, the fault characteristics of various fault types are as follows:

Type I fault: The sequence square wave of each test point is shown in Figure 3. A is the first to change to a high level at time t1, and then returns to a low level at time t2, and D suddenly changes to a high level at time t3, and t3 is satisfied. -t2 < 1s;

Type II fault: The timing square wave of each test point is shown in Figure 4. A suddenly changes to high level at time t1 and keeps high level for a long time, D suddenly changes to high level at time t2, and meets the requirements of t2-t1 >15s;

Type III fault: The time series square wave of each test point is shown in Figure 5. B first suddenly changes to high level at t1 and keeps high level, A keeps low level, and D suddenly changes to high level at t2. flat, and satisfy t2-t1>15s;

Type IV fault: The timing square wave of each test point is shown in Figure 6. A suddenly changes to a high level at time t1 and maintains a high level all the time. After B suddenly changes to a high level, it immediately returns to a low level. Jump to high level at t2, and satisfy t2-t1<1s;

Type V fault: The timing square wave of each test point is shown in Figure 7. A, B, and C are always kept at low level, D is the first to suddenly change to high level at time t1, and E is the first to suddenly change to high level at time t3. , F is the first to suddenly change to a high level at time t2, and t2-t1<1s, t3>t1;

Class VI fault: the time series square wave of each test point is shown in Figure 8, E first suddenly changes to high level at time t1, D and F suddenly change to high level at time t2, and t2>t1, t2-t1< 1s;

Type VII fault: The time series square wave of each test point is shown in Figure 9. A suddenly changes to high level at time t1, returns to low level at time t2, B returns to low level at time t3, and t3-t2 >3S, t4-t3<1S.

Specifically, referring to Table 1, Table 1 includes the characteristic information corresponding to various fault types. Matching with the fault feature information, it is determined that the fault type that is successfully matched is the nitrogen leakage fault type in the actual situation.

The nitrogen leakage fault diagnosis method provided by the embodiment of the present invention includes: if the level of one of the preset test points in the circuit breaker control circuit changes, acquiring the level change information of each preset test point, which can effectively Monitor the dynamics of the circuit breaker control circuit, and accurately control the level change information of each test point; when the circuit breaker issues a nitrogen leakage fault alarm, obtain the preset level status of each test point at the alarm time, so as to analyze the fault type ;According to the preset level change time and high level duration of each test point, determine the sequence of the preset level change and the time interval of the level change, and according to the preset level change of each test point The sequence of changes, the time interval of level changes, the level status at the alarm time, and the preset fault type characteristic information determine the nitrogen leakage fault type of the circuit breaker, and realize the automatic diagnosis of nitrogen leakage fault, which can be quickly determined Fault type, locate fault location, shorten the maintenance cycle, and greatly improve the maintenance efficiency.

Further, the acquiring the level change information of each preset test point includes:

The level change information of each preset test point is acquired through the clock module, and the level change information is stored in the storage module.

Specifically, the clock module collects the level change time and high level duration of each test point in the time period from the time when the level changes at the first test point to the nitrogen leakage fault alarm time, and obtains the above level through the clock module. Change information, because it takes a certain amount of time to obtain the level change information, until the circuit breaker has a nitrogen leakage fault alarm, all the level change information can be obtained, and the level state detection module collects the level state of each test point at the time of the alarm. , through the level state detection module to obtain the level state of each test point at the alarm time, the acquired level change information and level state can be stored in the storage module first, and then adjusted from the storage module when analyzing the fault type. Obtain the required information and improve the order and accuracy of the information obtained.

Further, the nitrogen leakage fault of the circuit breaker is determined according to the preset sequence of level changes at each test point, the time interval of the level changes and the level state at the alarm moment, as well as the preset fault type characteristic information. Types include:

Match the preset sequence of level changes, the time interval of level changes, and the level state at the alarm moment with the preset fault type information, respectively, to determine the successfully matched fault type.

Specifically, in the matching process, the matching process of the level state of each test point at the alarm time is relatively simple, and the level state of each test point at the alarm time can be preferentially matched, and the fault type that is successfully matched in the first stage is determined, and then the The sequence of level changes at each test point and the time interval of level changes are matched with the fault information of the successfully matched fault types in the first stage, and the successfully matched fault types in the second stage are determined, that is, it is determined that the circuit breaker has nitrogen leakage The fault type of the fault, the matching algorithm is optimized, the matching efficiency is improved, the matching result is more accurate, and the fault location can be quickly and accurately located according to the finally determined fault type, improving the maintenance efficiency.

Further, the nitrogen leakage fault diagnosis method also includes:

Obtain the alarm time of the nitrogen leakage fault alarm of the circuit breaker through the clock module;

The nitrogen leakage fault type and the alarm time are stored in the storage module, and sent to the display module for display.

Specifically, the nitrogen leakage fault type and alarm time are displayed through the display module, which can help the staff to understand the fault situation more intuitively, help to improve the maintenance efficiency and shorten the maintenance cycle.

Referring to FIG. 10 , a second aspect of the embodiment of the present invention provides a nitrogen leakage fault diagnosis device, including:

The first obtaining unit 1001 is configured to obtain level change information of each preset test point if the level of one of the preset test points in the circuit breaker control circuit changes, where the level change information includes The moment of level change and the duration of high level;

The second obtaining unit 1002, when the circuit breaker issues a nitrogen leakage fault alarm, obtains the level state of each preset test point at the alarm moment;

The information determination unit 1003 is used to determine the sequence of the preset level changes and the time interval of the level changes according to the preset level change moment and high level duration of each test point;

The fault type determination unit 1004 is used to determine the open circuit according to the preset sequence of the level changes of each test point, the time interval of the level changes and the level state at the alarm moment, as well as the preset fault type characteristic information Type of nitrogen leak in the gasifier.

Further, the first obtaining unit 1001 includes:

The information storage unit is used for acquiring the level change information of each preset test point through the clock module, and storing the level change information in the storage module.

Further, the fault type determination unit 1004 includes:

The information matching unit is used to match the preset sequence of level changes, the time interval of level changes, and the level status at the alarm moment with the preset fault type information respectively, and determine the faults that are successfully matched type.

Further, the nitrogen leakage fault diagnosis device also includes:

an alarm time obtaining unit, used for obtaining the alarm time of the nitrogen leakage fault alarm of the circuit breaker through the clock module;

The output unit is used to store the nitrogen leakage fault type and the alarm time in the storage module, and send them to the display module for display.

Referring to FIG. 11 , a third aspect of the embodiment of the present invention provides a nitrogen leakage fault diagnosis system, including a test module 1120 and a processor 1110;

The test module 1120, connected with the processor 1110, is used to collect the level change information of each preset test point in the circuit breaker control circuit, and the level change information includes the level change time and the high level duration. , and is also used to collect the level state of each preset test point at the moment when the circuit breaker issues a nitrogen leakage fault alarm;

The processor 1110 is configured to obtain the level change information of each preset test point through the test module 1120 if the level of one of the preset test points in the circuit breaker control circuit changes; When the circuit breaker issues a nitrogen leakage fault alarm, the test module 1120 obtains the level state of each preset test point at the alarm time; according to the preset level change time and high level duration of each test point, determine Preset the sequence of level changes of each test point and the time interval of level changes; according to the preset sequence of level changes of each test point, the time interval of level changes and the level status at the alarm moment, and The preset fault type characteristic information determines the nitrogen leakage fault type of the circuit breaker.

Specifically, the test module 1120 includes a level state detection module 1121 and a clock module 1122. The level state detection module 1121 and the clock module 1122 are both connected to the processor 1110. The level state detection module 1121 is used to collect preset test points in The circuit breaker sends out the level state at the moment of nitrogen leakage fault alarm. The clock module 1122 is used to collect the level change information of each preset test point in the circuit breaker control circuit. The level state detection module 1121 includes six A3144E type Halls. The effect sensors, respectively disposed at six test points, further include a signal processing circuit, and the signal processing circuit is connected with the processor 1110 . The conduction of the current will generate a magnetic field, and the A3144E Hall effect sensor will output a low level when a magnetic substance is approaching, otherwise it will remain a high level. After inverting the collected level signal, the detected level state is converted into a low-level signal that can be recognized by the processor through the optocoupler in the signal processing circuit, and the low-level signal is sent to the processor. The interrupt processing module of 1110, after receiving the low-level signal, the processor 1110 obtains relevant information of each test point through the test module. The nitrogen leakage fault diagnosis system in this embodiment realizes the automatic diagnosis of the nitrogen leakage fault in the circuit breaker, can quickly determine the fault type, locate the fault location, shorten the maintenance period, and greatly improve the maintenance efficiency.

Referring to FIG. 12, further, the nitrogen leakage fault diagnosis system further includes a storage module 1130, and the test module 1120 includes a clock module 1122;

The processor 1110 is connected to the storage module 1130 and the clock module 1122 respectively, and is also used to obtain the level change information of each test point through the clock module 1122, and store the level change information in the storage module. 1130.

Specifically, the clock module 1122 adopts the DS1302S chip and is connected to the serial communication module of the processor 1110. The processor 1110 reads the level state of the corresponding pin through the level state detection module 11221, and obtains the level state of each test point through the clock module 1122. For the level change information, the acquired level state and level change information are stored in the storage module 1130. The storage module 1130 is composed of an EEPROM chip, specifically a 24C02C-E/MS chip.

Referring to FIG. 12, further, the nitrogen leakage fault diagnosis system further includes a display module 1140, the display module 1140 includes a liquid crystal display chip and a liquid crystal display screen, and the liquid crystal display chip is connected with the serial communication module of the processor 1110, which can display clearly and intuitively The type of failure and the time of failure of nitrogen leakage.

The processor 1110 is further configured to match the preset sequence of level changes, the time interval of level changes, and the level status at the alarm moment with the preset fault type information, respectively, to determine the faults that are successfully matched. type. When a high level is detected at the test point F, the processor 1110 retrieves the information stored in the storage module 1130, and compares the level of the six sampling points A, B, C, D, E, and F, and the time sequence of the potential sudden change. , the duration of the high level is matched with the fault type characteristic information stored in the processor 1110, and the matched fault type is displayed on the liquid crystal display screen. The processor 1110 is further configured to obtain the alarm time of the nitrogen leakage fault alarm of the circuit breaker through the clock module 1122, store the nitrogen leakage fault type and the alarm time in the storage module 1130, and send it to the display module 1140 for display.

12, further, the nitrogen leakage fault diagnosis system further includes a button module 1150, the button module 1150 adopts a multiplex switch input circuit, and the button module 1150 is connected to the I/O interface module of the processor.

Referring to FIG. 12, further, the nitrogen leakage fault diagnosis system further includes a power supply module 1160, the power supply module 1160 includes a rectification and step-down circuit and a power conversion chip. The rectification and step-down circuit is connected to a 220V mains power supply, and rectifies and reduces the mains power. After the voltage processing, power is provided for the processor 1110 , the level state detection module 1121 , the clock module 1122 , the storage module 1130 , the display module 1140 and the key module 1150 through the power conversion chip.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working processes of the units and modules in the above-mentioned system, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In the embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the system embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated modules/units, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the present invention can implement all or part of the processes in the methods of the above embodiments, and can also be completed by instructing relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, the steps of the foregoing method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-Only Memory (ROM) , Random Access Memory (Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable media may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer-readable media Excluded are electrical carrier signals and telecommunication signals.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to implement the foregoing implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the within the protection scope of the present invention.

Claims (8)

1. a nitrogen leakage fault diagnosis method, is characterized in that, comprises: If the level of one of the preset test points in the circuit breaker control circuit changes, acquire the level change information of each preset test point, where the level change information includes a level change time and a high level duration; the acquiring the level change information of each preset test point includes: acquiring the level change information of each preset test point through a clock module, and storing the level change information in a storage module; When the circuit breaker issues a nitrogen leakage fault alarm, obtain the level state of each preset test point at the alarm moment; According to the preset level change time and high level duration of each test point, determine the sequence of the preset level change and the time interval of the level change; The nitrogen leakage fault type of the circuit breaker is determined according to the preset sequence of level changes at each test point, the time interval of level changes and the level state at the alarm moment, as well as the preset fault type characteristic information. 2. The method for diagnosing nitrogen leakage faults according to claim 1, characterized in that, according to the sequence of the level changes at each preset test point, the time interval of the level changes, and the level state at the alarm moment, As well as the preset fault type characteristic information, it is determined that the nitrogen leakage fault type of the circuit breaker includes: Match the preset sequence of level changes, the time interval of level changes, and the level state at the alarm moment with the preset fault type information, respectively, to determine the successfully matched fault type. 3. The nitrogen leakage fault diagnosis method according to claim 1, characterized in that, further comprising: Obtain the alarm time of the nitrogen leakage fault alarm of the circuit breaker through the clock module; The nitrogen leakage fault type and the alarm time are stored in the storage module, and sent to the display module for display. 4. A nitrogen leakage fault diagnosis device, characterized in that, comprising: The first acquisition unit is configured to acquire level change information of each preset test point if the level of one of the preset test points in the circuit breaker control circuit changes, where the level change information includes electrical power. Level change time and high level duration; the first obtaining unit includes: an information storage unit, used for obtaining the level change information of each preset test point through the clock module, and storing the level change information in the storage unit module; The second obtaining unit, when the circuit breaker issues a nitrogen leakage fault alarm, obtains the level state of each preset test point at the alarm moment; The information determination unit is used to determine the sequence of the preset level changes and the time interval of the level changes according to the preset level change time and high level duration of each test point; The fault type determination unit is used to determine the circuit breaker according to the preset sequence of the level changes of each test point, the time interval of the level changes and the level state at the alarm moment, as well as the preset fault type characteristic information type of nitrogen leak failure. 5. The nitrogen leakage fault diagnosis device according to claim 4, wherein, The failure type determination unit includes: The information matching unit is used to match the preset sequence of level changes, the time interval of level changes, and the level status at the alarm moment with the preset fault type information respectively, and determine the faults that are successfully matched type. 6. A nitrogen leakage fault diagnosis system, comprising a test module and a processor; The test module, connected to the processor, is used to collect the level change information of each preset test point in the circuit breaker control circuit, the level change information includes the level change time and the high level duration, and also It is used to collect the level state of each preset test point at the moment when the circuit breaker issues an alarm for nitrogen leakage fault; The processor is configured to obtain the level change information of each preset test point through the test module if the level of one of the preset test points in the circuit breaker control circuit changes; When the circuit breaker issues a nitrogen leakage fault alarm, the test module obtains the level status of each preset test point at the alarm time; according to the preset level change time and high level duration of each test point, the preset level status of each test point is determined. The sequence of level changes of test points and the time interval of level changes; according to the preset sequence of level changes of each test point, the time interval of level changes and the level state at the alarm time, and the preset The fault type characteristic information determines the nitrogen leakage fault type of the circuit breaker. 7. The nitrogen leakage fault diagnosis system according to claim 6, further comprising a storage module, and the test module comprises a clock module; The processor is connected to the storage module and the clock module, respectively, and is further configured to acquire the level change information of each test point through the clock module, and store the level change information in the storage module. 8. A computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the nitrogen leakage fault according to any one of claims 1 to 3 is realized The steps of the diagnostic method.

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