CN115796445A - Method for improving capability of electrical equipment in preventing sudden short circuit fault and related equipment - Google Patents
Method for improving capability of electrical equipment in preventing sudden short circuit fault and related equipment Download PDFInfo
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Abstract
The method provided by the embodiment of the application can integrate the operating fault and manufacturing standard of the electrical equipment, integrate the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improve the capability of the electrical equipment for preventing the sudden short circuit fault by checking the effectiveness of a partial discharge electrification detection device of the electrical equipment and the dust foreign matter of the electrical equipment.
Description
Technical Field
The present application relates to the field of power equipment operation and control technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for improving an ability of electrical equipment to prevent an accidental short circuit fault.
Background
In practical application, the insulation system of the electrical equipment is very important for the safety of the electrical equipment, for example, the combined electrical appliance is the most important switch equipment of a power system, and the sudden short circuit is the most difficult fault form which is predicted in advance and has the greatest harm degree in the faults of the combined electrical appliance. The sudden short circuit of the combined electrical apparatus can cause the safety risk of a power grid of the total station voltage loss of the transformer substation, the personal safety risk of the porcelain bottle explosion of the combined electrical apparatus and the equipment safety risk that spare parts cannot be obtained in a short time.
In the practical application process, the sudden short-circuit fault of the combined electrical apparatus caused by the problems of key group components such as the insulating pull rod is obviously increased, and the problem of insufficient reliability of the key insulating components is fully exposed. At present, the related detection technical means aiming at the insulating part is limited, and the problem of the combined electrical appliance in the operation is difficult to find.
Disclosure of Invention
In view of the above, the present application provides a method, an apparatus, a device and a readable storage medium for improving the capability of electrical equipment to prevent sudden short circuit failure, so as to solve the technical defect in the prior art that it is difficult to find the failure of the electrical equipment in time.
A method for improving the capability of electrical equipment to prevent sudden short-circuit fault comprises the following steps:
analyzing whether the purchasing technical specification of the target electrical equipment is complete;
if the purchasing technical specification of the target electrical equipment is not complete, revising the purchasing technical specification of the target electrical equipment;
if the purchasing technical specification of the target electrical equipment is complete, analyzing whether the purchasing technical specification of the target electrical equipment is effectively implemented;
if the purchasing technical specification of the target electrical equipment is not effectively implemented, making a model checking working specification of the target electrical equipment;
checking the effectiveness of a partial discharge live detection device for placing the target electrical equipment on site according to the model checking working specification of the target electrical equipment;
and the dust and foreign matters of the target electrical equipment are checked, so that the capability of preventing sudden short-circuit faults of the target electrical equipment is improved.
Preferably, the checking the effectiveness of the partial discharge live detection device for placing the target electrical equipment on site according to the model audit work specification of the target electrical equipment includes:
adopting a basin-type insulator of a metal flange as an insulator of the target electrical equipment;
and carrying out partial discharge live detection by using an external ultrahigh frequency sensor.
Preferably, a partial discharge test window is reserved on the metal flange of the basin-type insulator adopting the metal flange.
Preferably, the area of the partial discharge test window is not less than a preset first threshold value,
the width of the partial discharge test window is not less than a preset second threshold value;
and the height of the partial discharge test window is not less than a preset third threshold value.
Preferably, the partial discharge test window is configured to couple a discharge signal occurring inside the target electrical device within the partial discharge test window when the target electrical device is running.
Preferably, the preset first threshold is 825 square millimeters,
the preset second threshold value is 15 mm;
the preset third threshold value is 55 mm.
Preferably, the inspecting dust and foreign matter of the target electrical equipment includes:
detecting the thickness, hardness and bonding strength of a silver coating at a conductive contact part of the target electrical equipment according to silver coating quality standards and detection means provided by manufacturers of the target electrical equipment;
detecting silver plating quality at the movable and static contacts of the circuit breaker, the disconnecting switch and the grounding switch in the target electrical equipment, and ensuring that silver plating layers at the movable and static contacts of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment do not fall off, copper is not exposed and no obvious metal debris is generated after the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are continuously subjected to at least 200 times of opening and closing operations;
when the interior of the tank body in the target electrical equipment is coated with the antirust or anticorrosive paint, the paint surface is smooth without abnormal bulges and has good adhesive force;
checking whether a circuit breaker, a disconnecting switch and a grounding switch of the target electrical equipment meet preset delivery test requirements;
in the field handover test of the target electrical equipment, under a preset first voltage condition, the alternating current withstand voltage value of the target electrical equipment is completely consistent with the factory value of the alternating current withstand voltage value of the target electrical equipment, and under a preset second voltage condition, the alternating current withstand voltage value of the target electrical equipment is not lower than a preset fourth threshold value.
An apparatus for improving the capability of electrical equipment to prevent sudden short circuit failure, comprising:
the first analysis unit is used for analyzing whether the purchasing technical specification of the target electrical equipment is complete or not;
the revising unit is used for revising the procurement technical specification of the target electrical equipment when the execution result of the first analyzing unit is that the procurement technical specification of the target electrical equipment is not complete;
the second analysis unit is used for analyzing whether the purchase technical specification of the target electrical equipment is effectively implemented or not when the execution result of the first analysis unit is that the purchase technical specification of the target electrical equipment is completed;
the making unit is used for making a model audit working specification of the target electrical equipment when the execution result of the second analysis unit shows that the purchasing technical specification of the target electrical equipment is not effectively met;
the first checking unit is used for checking the working specification according to the model of the target electrical equipment and checking the effectiveness of a partial discharge live detection device for placing the target electrical equipment on site;
and the second inspection unit is used for inspecting the dust and foreign matters of the target electrical equipment so as to improve the capability of preventing sudden short-circuit faults of the target electrical equipment.
An apparatus for improving the ability of electrical equipment to prevent a sudden short circuit fault, comprising: one or more processors, and a memory;
the memory has stored therein computer readable instructions which, when executed by the one or more processors, carry out the steps of the method of enhancing the capability of an electrical device to prevent a sudden short circuit fault as described in any of the preceding introductions.
A readable storage medium having stored therein computer readable instructions, which, when executed by one or more processors, cause the one or more processors to carry out the steps of the method of improving the capability of an electrical device to protect against a sudden short-circuit fault as described in any of the preceding introductions.
According to the technical scheme, when the capability of preventing the sudden short circuit of the target electrical equipment needs to be detected, the method provided by the embodiment of the application can analyze whether the purchasing technical specification of the target electrical equipment is complete; if the procurement technical specification of the target electrical equipment is not complete, the target electrical equipment may be a product with unqualified quality, and the procurement technical specification of the target electrical equipment may be revised; if the purchasing technical specification of the target electrical equipment is complete, analyzing whether the purchasing technical specification of the target electrical equipment is effectively implemented or not; so that the procurement of the target electrical equipment can be confirmed
Whether the specification is effectively implemented or not is judged, if the purchasing technical specification of the target electrical equipment is not effectively implemented, the examination work aiming at the target electrical equipment is not effectively implemented, and the target electrical equipment is possibly weak in precautionary capacity when sudden short-circuit fault occurs, the model examination work specification of the target electrical equipment can be made, so that the examination work requirement on the target electrical equipment can be improved; after the model examination work specification of the target electrical equipment is formulated, the effectiveness of a partial discharge live detection device for placing the target electrical equipment on site can be checked according to the model examination work specification of the target electrical equipment, so that the partial discharge condition of the target electrical equipment can be accurately measured; and is electrically connected to the targetAnd the dust and foreign matters of the equipment are checked to improve the capability of preventing sudden short-circuit faults of the target electrical equipment.
The method provided by the embodiment of the application can integrate the operation fault and the manufacturing standard of the electrical equipment, integrate the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improve the capability of the electrical equipment for preventing sudden short-circuit fault by checking the effectiveness of the partial discharge electrification detection device of the electrical equipment and the dust and foreign matters of the electrical equipment.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a flowchart of a method for improving an ability of an electrical device to prevent an abrupt short-circuit fault according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of an apparatus for improving an ability of electrical equipment to prevent a sudden short circuit fault according to an example of the present application;
fig. 3 is a block diagram of a hardware structure of an apparatus for improving an ability of an electrical apparatus to prevent an accidental short circuit fault, disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In the existing research, the sudden short-circuit fault of the combined electrical apparatus caused by the problems of key group components such as the insulating pull rod is obviously increased, and the problem of insufficient reliability of the key insulating components is fully exposed.
At present, aiming at the related technical requirements of an insulating part, the detection requirements are mainly some, such as partial discharge under 80% power frequency withstand voltage value, X-ray detection and the like, and the problem of the electrical equipment in operation is difficult to find;
at present, the residual unqualified devices 80 are found out cumulatively by means of carrying out the on-line monitoring of the partial discharge of the combined electrical apparatus and checking the devices in operation, the main reasons are that a monitoring channel has no response, the coverage range is insufficient in effectiveness and an alarm mechanism fails, and the effectiveness of the partial discharge detection device of the combined electrical apparatus needs to be improved; the infrared temperature measurement has low on-site detection efficiency and high data analysis difficulty, cannot perform comparative analysis on historical data, finds that the effectiveness of internal overheating faults is insufficient, and has not been popularized and applied although technical specifications related to internal overheating infrared detection of gas insulated metal closed switches have been published at present.
The loop resistance test of the combined electrical apparatus is complex, the comparative analysis of historical data is difficult, the preventive test period of the loop resistance is long, and the effectiveness of finding the internal overheat fault is limited.
Obviously, most of the existing schemes for improving the capability of electrical equipment in preventing sudden short circuit faults are difficult to adapt to complicated and variable service requirements.
Therefore, the applicant researches a scheme for improving the capability of the electrical equipment for preventing the sudden short-circuit fault, and the scheme can integrate the operating fault and the manufacturing standard of the electrical equipment, integrate the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improve the capability of the electrical equipment for preventing the sudden short-circuit fault by checking the effectiveness of a partial discharge electrification detection device of the electrical equipment and the dust of the electrical equipment.
The methods provided by the embodiments of the present application are operational with numerous general purpose or special purpose computing device environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multi-processor appliances, distributed computing environments that include any of the above devices or equipment, and the like.
The embodiment of the application provides a method for improving the capability of electrical equipment in preventing sudden short-circuit faults, the method can be applied to various power systems or electrical equipment management systems, and can also be applied to various computer terminals or intelligent terminals, and the execution main body can be a processor or a server of the computer terminal or the intelligent terminal.
Referring to fig. 1, a flow of a method for improving an ability of an electrical device to prevent an abrupt short-circuit fault according to an embodiment of the present application is described below, and as shown in fig. 1, the flow may include the following steps:
and step S101, analyzing whether the purchasing technical specification of the target electrical equipment is complete.
Specifically, in the practical application process, the electrical equipment generally has corresponding procurement specifications.
The procurement specifications for electrical equipment may generally include the following information:
the method comprises the following steps of installing the equipment, working range of the equipment, technical requirements of the equipment, responsibility range and interface of the equipment, maintenance method of the equipment and technical standard of the equipment.
For example,
the combined electrical apparatus is a common electrical apparatus, and is a device which combines two or more electrical apparatuses into a whole according to the wiring requirement, and each electrical apparatus still keeps original performance.
The combined electrical apparatus has compact structure, small appearance and installation size and convenient use, and the performance of each electrical apparatus in the combined electrical apparatus can be better coordinated and matched so as to better exert the performance of each electrical apparatus.
Common combined electrical appliances can be divided into two categories, namely low-voltage combined electrical appliances and high-voltage combined electrical appliances according to the voltage level.
Common low-voltage combined electrical appliances include a fuse type knife switch, an electromagnetic starter and a comprehensive starter. The low-voltage combined electrical apparatus is convenient to use, and can greatly simplify the power system.
For example, in the motor branch of the industrial electric power drive automatic control system, only one low-voltage electrical appliance formed by combining a contactor, a breaker or a fuse, a thermal relay and the like is used, and the motor can be remotely controlled to frequently start and stop and have various protection and control functions.
The high-voltage combined electrical apparatus can be divided into an open type and a totally enclosed type according to an insulation structure.
The open type high-voltage combined electrical apparatus can be formed by combining a current transformer, a voltage transformer, a cable head and other elements together by taking an isolating switch or a circuit breaker as a main body.
The fully-enclosed high-voltage combined electrical apparatus can seal the high-voltage charged parts of all the components in a grounded metal shell, and the shell is filled with gas, oil or solid insulating medium with good insulating property.
Each component element in the totally enclosed high-voltage combined electrical apparatus generally comprises a circuit breaker, an isolating switch, a grounding switch, a voltage transformer, a current transformer, a bus, a lightning arrester and a cable terminal.
All the components in the totally enclosed high-voltage combined electrical apparatus can be connected in sequence and form a whole according to the wiring requirement.
The sulfur hexafluoride totally-enclosed electric appliance appearing in the early stage, referred to as SF6 totally-enclosed high-voltage combined electric appliance, has the characteristics of small installation volume, good safety performance, high reliability, long overhaul period and the like.
Therefore, different electrical equipment has different procurement technical specifications.
Accordingly, it may be analyzed whether the procurement specifications of the target electrical devices are complete, so that it may be determined whether the procurement specifications of the target electrical devices need to be revised.
If the procurement technical specification of the target electrical equipment is not perfect, the quality of the target electrical equipment may not meet the technical standard and the quality requirement of the electrical equipment.
The quality of the target electrical equipment is not qualified, and potential safety hazards may exist in using the target electrical equipment.
If the procurement specifications of the target electrical device are not complete, and the procurement specifications of the target electrical device may need to be revised, step S102 may be performed.
If the purchasing technical specification of the target electrical equipment is completed, it indicates that the target electrical equipment should be the electrical equipment meeting the technical requirement and quality requirement of purchasing, and it may be further analyzed whether the purchasing technical specification of the target electrical equipment is effectively implemented.
And step S102, revising the procurement technical specification of the target electrical equipment.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine whether the procurement technical specification of the target electrical device is complete, and if the procurement technical specification of the target electrical device is incomplete, it indicates that the quality of the target electrical device may not meet the technical standard and the quality requirement of the electrical device.
The target electrical equipment is of unacceptable quality and there may be a safety hazard with the target electrical equipment.
If the purchasing technical specification of the target electrical equipment is not complete, the problems of the existing purchasing technical specification of the target electrical equipment can be found by performing benchmarking with the purchasing technical specification of some advanced power grid enterprises and benchmarking with the purchasing technical specification of advanced manufacturing enterprises and collecting the problems in the manufacturing of the target electrical equipment, the installation of the electrical equipment and the operation of the electrical equipment, and the purchasing technical specification of the target electrical equipment is revised timely according to the problems in the purchasing technical specification of the target electrical equipment.
And step S103, analyzing whether the purchasing technical specification of the target electrical equipment is effectively implemented.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine whether the procurement specifications of the target electrical device are complete, and if the procurement specifications of the target electrical device are complete, it indicates that the target electrical device should be an electrical device that meets the procurement specifications and quality requirements.
However, although the procurement specifications of the target electrical devices are complete, if the procurement specifications of the target electrical devices are not effectively implemented, the target electrical devices may still have safety hazards, which may result in poor capability of the target electrical devices to protect against sudden short-circuit faults.
Therefore, in the case that it is determined that the procurement specifications of the target electrical devices are complete, it may be further analyzed whether the procurement specifications of the target electrical devices are effectively implemented to ensure that the target electrical devices can be procured and used according to the procurement specifications of the target electrical devices.
If it is determined that the purchasing technical specification of the target electrical double-color board is not effectively implemented, it indicates that the examination work on the target electrical equipment is not in place, and the problem existing when the target electrical equipment is purchased or used is not found in time, so that the target electrical equipment has potential safety hazards, and the capability of preventing sudden short-circuit faults of the target electrical equipment may be further weak.
And step S104, making model checking working specifications of the target electrical equipment.
Specifically, as can be seen from the foregoing description, the method provided in this embodiment of the present application may further analyze whether to effectively implement the procurement technical specification of the target electrical device when it is determined that the procurement technical specification of the target electrical device is complete.
If it is determined that the purchasing technical specification of the target electrical double-color board is not effectively implemented, it indicates that the examination work on the target electrical equipment is not in place, and a problem existing when the target electrical equipment is purchased or used is not timely found, so that the target electrical equipment has potential safety hazards, and the capability of preventing sudden short-circuit faults of the target electrical equipment is possibly weaker.
Therefore, although the procurement specifications of the target electrical equipment are complete, in order to improve the capability of the target electrical equipment for dealing with the sudden short-circuit fault, it is still necessary to improve the inspection work for the target electrical equipment, so that it is ensured that the target electrical equipment can be procured and used according to the procurement specifications of the target electrical equipment, and the potential safety hazard caused by the failure to effectively implement the procurement specifications of the target electrical equipment is reduced.
Therefore, if it is determined that the procurement technical specification of the target electrical two-color board is not effectively implemented, the model audit work specification of the target electrical device can be made.
The model examination work specification of the target electrical equipment can refer to standards of advanced power grid enterprises in terms of technical specification landing, and collect problems of the target electrical equipment in implementation procurement technical specifications to formulate the model examination work specification of the target electrical equipment.
The model checking work specification of the target electrical device comprises checking standards and technical requirements in the process of purchasing, installing and using the target electrical device.
The work of the target electrical equipment in the processes of purchase, use and maintenance is inspected according to the model inspection work specification of the target electrical equipment, so that the problems or potential safety hazards of the target electrical equipment can be found in time, the safety of the target electrical equipment is improved, the probability of failure of the target electrical equipment is reduced, and the capability of the target electrical equipment for dealing with sudden short-circuit faults is improved.
And step S105, checking the effectiveness of the partial discharge live detection device on which the target electrical equipment is placed on site according to the model checking working specification of the target electrical equipment.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may refer to standards related to technical specification landing for some advanced power grid enterprises, and collect the problems of the target electrical device in the implementation procurement technical specification to formulate the model audit work specification of the target electrical device.
After the model audit work specification of the target electrical device is determined, the effectiveness of the partial discharge live detection device on which the target electrical device is placed on site can be checked according to the model audit work specification of the target electrical device.
In practical applications, in the process of checking the safety of the target electrical device, a partial discharge live detection device or apparatus may be installed in a field where the target electrical device is installed to check whether the target electrical device has a fault.
The partial discharge detector is a special instrument for measuring abnormal electric spark generated in or outside electrical equipment and sending out sound and light alarm signals.
The basic principle of the partial discharge detection device is that a voltage is applied to a measured object, and the voltage of the measured object can be changed within a certain range, so that an electric arc or an electric spark is generated. Whether the abnormal phenomenon exists or not is judged by analyzing the change condition of the current.
The partial discharge detection device may include a high-voltage pulse transformer, a high-frequency oscillation circuit, a photoelectric coupling device, and a display instrument.
When the detected object has a fault, instantaneous overcurrent is formed to break down the insulating layer of the air gap to generate electric arc or spark when the leakage current is increased to a certain degree due to insulation damage or other reasons; at this time, if high voltage is applied to the primary winding of the high-voltage pulse transformer, the leakage current flowing through the primary winding can be rapidly increased to achieve the purpose of breakdown; meanwhile, due to the action of electromagnetic induction, the magnetic flux in the secondary coil of the high-voltage power supply is changed correspondingly, and a high-frequency oscillation waveform is generated. The high-frequency oscillation waveforms are converted into corresponding digital values through a photoelectric coupler and then input into a computer for real-time monitoring and analysis processing, and then parameter information such as whether short circuit or electric leakage occurs inside the equipment or not, and the position and the size of a fault point can be judged.
Therefore, whether the partial discharge live detection device of the target electrical equipment placed on site is effective or not can be judged, and whether the target electrical equipment has a fault or not can be judged.
Therefore, after the model audit work specification of the target electrical equipment is made, the effectiveness of the partial discharge live detection device on which the target electrical equipment is placed on site can be checked according to the model audit work specification of the target electrical equipment.
If the partial discharge live detection device on which the target electrical equipment is placed on site is effective, it indicates that whether the target electrical equipment has a fault can be detected by using the partial discharge live detection device on which the target electrical equipment is placed on site.
If the partial discharge live detection device on which the target electrical equipment is placed on site is effective, it indicates that the partial discharge live detection device on which the target electrical equipment is placed on site cannot be used for detecting whether the target electrical equipment has a fault, and the partial discharge live detection device on which the target electrical equipment is placed on site may need to be replaced, so that whether the target electrical equipment has a fault can be detected by using the partial discharge live detection device on which the target electrical equipment is placed on site, which is helpful for finding the fault existing in the target electrical equipment in time and removing the fault in time, and is helpful for improving the capability of the target electrical equipment for preventing sudden short circuit fault.
And S106, checking the dust and foreign matters of the target electrical equipment to improve the capability of preventing sudden short-circuit faults of the target electrical equipment.
Specifically, it can be known from the above description that, the method provided in the embodiment of the present application may check, after making the model audit work specification of the target electrical device, the validity of the partial discharge live detection apparatus placed on the field on the target electrical device according to the model audit work specification of the target electrical device. So that it can be ensured that whether the target electrical equipment has a fault can be detected by using a partial discharge live detection device in which the target electrical equipment is placed on site.
Further, if the dust of the target electrical device is too much, the potential safety hazard of the target electrical device may be increased, and the capability of the target electrical device to prevent sudden short-circuit failure may be affected.
Therefore, the method provided by the embodiment of the application can also be used for detecting the dust and foreign matters of the target electrical equipment so as to improve the capability of preventing sudden short-circuit faults of the target electrical equipment.
According to the technical scheme, the method provided by the embodiment of the application can integrate the operation fault and the manufacturing specification of the electrical equipment, integrate the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical specification and the examining specification of the electrical equipment, and improve the capability of the electrical equipment for preventing sudden short-circuit faults by checking the effectiveness of the partial discharge live detection device of the electrical equipment and the dust and foreign matters of the electrical equipment.
It can be seen from the above-described technical solutions that the method provided in the embodiment of the present application can check the validity of the partial discharge live detection apparatus for placing the target electrical device on the site according to the model audit working specification of the target electrical device, and then introduces the process, which may include the following steps:
step S201, a basin-type insulator of a metal flange is used as an insulator of the target electrical device.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine the model audit work specification of the target electrical device.
After determining the model audit work specification of the target electrical device, the effectiveness of the partial discharge live detection device of the target electrical device may be further placed on site according to the model audit work specification of the target electrical device.
In the actual process, in order to better check the effectiveness of the partial discharge live detection device for placing the target electrical equipment on the site, a basin-shaped insulator of a metal flange can be adopted as the insulator of the target electrical equipment.
Wherein the content of the first and second substances,
the metal flange of the basin-type insulator adopting the metal flange can be reserved with a partial discharge test window. The partial discharge test window may be configured to couple a discharge signal occurring inside the target electrical device in the partial discharge test window when the target electrical device operates, so that an abnormal current signal existing in the target electrical device may be found in time, and whether a fault exists in the target electrical device may be found by analyzing the abnormal signal of the target electrical device.
The area of the partial discharge test window may be not less than a preset first threshold,
the width of the partial discharge test window can be not less than a preset second threshold value;
the height of the partial discharge test window may not be less than a preset third threshold.
Wherein, the first and the second end of the pipe are connected with each other,
the preset first threshold may be 825 square millimeters,
the preset second threshold may be 15 mm;
the preset third threshold may be 55 mm.
For example, in the case of a liquid,
the area of the partial discharge test window of the target electrical device may be greater than or equal to 825 square millimeters, and the partial discharge test window of the target electrical device may be a window 15 millimeters wide and 55 millimeters high.
And S202, carrying out partial discharge live detection by using an external ultrahigh frequency sensor.
Specifically, as can be seen from the above description, in order to better check the effectiveness of the partial discharge live detection apparatus for placing the target electrical device on the site, the method provided in the embodiment of the present application may use a basin-type insulator of a metal flange as the insulator of the target electrical device.
Furthermore, in order to improve the accuracy and efficiency of detection, an external ultrahigh frequency sensor can be used for detecting partial discharge electrification.
According to the technical scheme, the method provided by the embodiment of the application can be used for fusing the operation fault and manufacturing standard of the electrical equipment, integrating the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improving the capability of the electrical equipment for preventing sudden short-circuit fault by checking the effectiveness of the partial discharge electrification detection device of the electrical equipment and the dust and foreign matters of the electrical equipment.
It can be seen from the above-described technical solutions that, in order to improve the capability of the target electrical device for preventing a sudden short circuit, the method provided in the embodiment of the present application may inspect dust and foreign matter of the target electrical device, and the following process is described, and the process may include the following steps:
step S301, detecting the thickness, hardness and bonding strength of the silver coating at the conductive contact part of the target electrical equipment according to the silver coating quality standard and detection means provided by the manufacturer of the target electrical equipment.
Specifically, in the actual application process, after the electrical device is produced, the manufacturer provides the quality standard, the detection means and some manufacturing data about the target electrical device.
Through the manufacturing data or the quality standard of the target electrical equipment and the detection means, the problems of the target electrical equipment can be effectively traced.
For example, manufacturers generally provide quality standards for silver plating on the electrical contact pads of electrical devices, as well as testing tools and manufacturing data.
The thickness, hardness and bonding strength of the silver coating at the conductive contact part of the target electrical equipment can be detected according to silver coating quality standards and detection means provided by manufacturers of the target electrical equipment, and whether the thickness, hardness and bonding strength of the silver coating at the conductive contact part of the target electrical equipment meet quality requirements or not can be determined.
For example,
the thickness, hardness and bonding strength of the silver coating at the conductive contact part of the target electrical equipment meet the relevant quality standard regulations.
Step S302, silver plating quality of the movable and stationary contacts of the circuit breaker, the disconnecting switch and the grounding switch in the target electrical equipment is detected, and after the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are continuously subjected to at least 200 times of on-off operation, silver plating layers at the movable and stationary contacts of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment do not fall off, copper is not exposed, and no obvious metal debris is generated.
Specifically, as can be seen from the above description, the method provided in the embodiments of the present application may determine that the manufacturer of the target electrical device provides the quality standard, the detection means, and some manufacturing data about the target electrical device.
Further, the silver plating quality at the moving and static contacts of the circuit breaker, the disconnecting switch and the grounding switch in the target electrical equipment can be detected according to the quality standard and the detection means of the target electrical equipment provided by the manufacturer of the target electrical equipment and some manufacturing data about the target electrical equipment, so that the silver plating layers at the moving and static contacts of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment can be ensured not to fall off, not to expose copper and not to generate obvious metal debris after the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are continuously subjected to at least 200 times of switching operation.
And if the circuit breaker, the isolating switch and the grounding switch of the target electrical equipment are continuously subjected to at least 200 times of on-off operation, silver coatings at the moving and static contacts of the circuit breaker, the isolating switch and the grounding switch of the target electrical equipment do not fall off, copper does not expose, and no obvious metal debris is generated. The performance of the target electrical equipment can be ensured to be normally exerted, and the probability of the target electrical equipment being in failure is reduced.
In the practical application process, the separation and combination mechanical operation test is carried out for no less than 200 times when the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are subjected to a factory test, so that the contacts of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment can be ensured to be fully worn, the interiors of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are thoroughly cleaned after the separation and combination mechanical operation test is carried out for at least 200 times, and after the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are confirmed to be free of abnormality, other factory tests are carried out.
Step S303, when the interior of the tank body in the target electrical equipment is coated with the antirust or anticorrosive paint, the paint surface should be smooth without abnormal bulges and have good adhesive force.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine that the manufacturer of the target electrical device provides the quality standard, the detection means, and some manufacturing data about the target electrical device.
Furthermore, according to the quality standard and detection means of the target electrical equipment provided by the manufacturer of the target electrical equipment and some manufacturing data about the target electrical equipment, when the interior of the tank body in the target electrical equipment is coated with an antirust or anticorrosive paint, the paint surface should be smooth and have no abnormal protrusions, and the adhesive force is good.
If the interior of the tank body in the target electrical equipment is coated with the antirust or anticorrosive paint, the paint surface is smooth and free from abnormal protrusions, and the adhesive force is good, the performance of the target electrical equipment can be ensured to be normally exerted, and the probability of failure of the target electrical equipment is reduced.
Step S304, checking whether the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment meet preset factory test requirements.
Specifically, as can be seen from the above description, the method provided in the embodiment of the present application may determine that the manufacturer of the target electrical device provides the quality standard, the detection means, and some manufacturing data about the target electrical device.
Further, it is possible to check whether the circuit breaker, the disconnecting switch and the grounding switch of the target electrical device meet preset factory test requirements according to the quality standard of the target electrical device, the detection means and some manufacturing data about the target electrical device, which are provided by the manufacturer of the target electrical device. In the practical application process, the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment must meet preset factory test requirements, and the quality of the target electrical equipment can meet the requirements.
Wherein the preset factory experimental requirements of the target electrical device may be as follows:
(1) In a factory test of the target electrical equipment, a lightning impulse tolerance test of which the positive polarity and the negative polarity are respectively at least 3 times is required to be carried out on the target electrical equipment under the voltage condition of 220kV or more;
(2) Performing a partial discharge test on the target electrical equipment after replacing all other insulation tests, wherein the test voltage for measuring the partial discharge of the target electrical equipment is not lower than 80% of the power frequency withstand voltage of the target electrical equipment;
and if the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment meet the preset factory test requirements, the performance of the target electrical equipment can be ensured to be normally exerted, and the probability of the target electrical equipment having faults is reduced.
Step S305, in the field handover test of the target electrical device, under a preset first voltage condition, an ac withstand voltage value of the target electrical device is completely consistent with an ex-factory value of the ac withstand voltage value of the target electrical device, and under a preset second voltage condition, the ac withstand voltage value of the target electrical device should not be lower than a preset fourth threshold.
Specifically, in order to improve the safety check on the target electrical device, in a field handover test of the target electrical device, under a preset first voltage condition, the ac withstand voltage value of the target electrical device may completely coincide with the factory value of the ac withstand voltage value of the target electrical device, and under a preset second voltage condition, the ac withstand voltage value of the target electrical device should not be lower than a preset fourth threshold.
Wherein the preset first voltage condition, the preset second voltage condition, and the preset fourth threshold may be set with reference to a use condition of the target electrical device.
For example, in a field transfer test of the target electrical device, under a voltage condition of 110kV to 220kV, the ac withstand voltage value of the target electrical device should completely coincide with the factory value of the ac withstand voltage value of the target electrical device;
under the voltage condition of 500kV, the alternating-current withstand voltage value of the target electrical equipment is not lower than 90% of the factory value of the alternating-current withstand voltage value of the target electrical equipment.
According to the technical scheme, the method provided by the embodiment of the application can be used for fusing the operation fault and manufacturing standard of the electrical equipment, integrating the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improving the capability of the electrical equipment for preventing sudden short-circuit fault by checking the effectiveness of the partial discharge electrification detection device of the electrical equipment and the dust and foreign matters of the electrical equipment.
The device for improving the sudden short-circuit fault prevention capability of the electrical equipment provided by the embodiment of the application is described below, and the device for improving the sudden short-circuit fault prevention capability of the electrical equipment described below and the method for improving the sudden short-circuit fault prevention capability of the electrical equipment described above may be referred to correspondingly.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an apparatus for improving an ability of electrical equipment to prevent a sudden short circuit fault, disclosed in an embodiment of the present application.
As shown in fig. 2, the apparatus for improving the capability of electrical equipment to prevent sudden short-circuit fault may include:
the first analysis unit 101 is configured to analyze whether the procurement technical specifications of the target electrical device are complete;
a revising unit 102, configured to revise the procurement specifications of the target electrical device when the execution result of the first analyzing unit is that the procurement specifications of the target electrical device are incomplete;
the second analysis unit 103 is configured to, when the execution result of the first analysis unit is that the procurement technical specification of the target electrical device is complete, analyze whether the procurement technical specification of the target electrical device is effectively implemented;
the formulating unit 104 is configured to formulate a model audit working specification of the target electrical device when an execution result of the second analyzing unit indicates that the procurement technical specification of the target electrical device is not valid;
a first checking unit 105, configured to check the validity of a partial discharge live detection apparatus on which the target electrical device is placed on site according to a model audit work specification of the target electrical device;
the second inspection unit 106 is configured to inspect dust and foreign matter of the target electrical device, so as to improve the capability of the target electrical device for preventing sudden short-circuit failure.
According to the technical scheme, when the sudden short circuit prevention capability of the target electrical equipment needs to be detected, the device provided by the embodiment of the application can analyze whether the purchasing technical specification of the target electrical equipment is complete; if the procurement technical specification of the target electrical equipment is not complete, the target electrical equipment may be a product with unqualified quality, and the procurement technical specification of the target electrical equipment may be revised; if the purchasing technical specification of the target electrical equipment is complete, analyzing whether the purchasing technical specification of the target electrical equipment is effectively implemented; so that procurement of the target electrical device can be confirmed
If the purchasing technical specification of the target electrical equipment is not effectively implemented, the inspection work aiming at the target electrical equipment is not effectively implemented, and the precautionary capability of the target electrical equipment is weaker when sudden short-circuit fault occurs possibly, the model inspection work specification of the target electrical equipment can be made, so that the inspection work requirement on the target electrical equipment can be improved; after the model examination work specification of the target electrical equipment is established, the field examination can be carried out according to the model examination work specification of the target electrical equipmentSetting the effectiveness of a partial discharge live detection device of the target electrical equipment so as to accurately measure the partial discharge condition of the target electrical equipment; and the dust and foreign matters of the target electrical equipment are checked, so that the capability of preventing sudden short-circuit faults of the target electrical equipment is improved.
The device provided by the embodiment of the application can integrate the operation fault and the manufacturing standard of the electrical equipment, integrate the data of the whole life cycle of the electrical equipment to manufacture the purchasing technical standard and the inspection standard of the electrical equipment, and improve the capability of the electrical equipment for preventing sudden short-circuit fault by checking the effectiveness of the partial discharge live detection device of the electrical equipment and the dust and foreign matters of the electrical equipment.
Further optionally, the first checking unit 105 includes:
a first setting unit for adopting a basin-type insulator of a metal flange as an insulator of the target electrical device;
and the second setting unit is used for carrying out partial discharge live detection by utilizing an external ultrahigh frequency sensor.
Further optionally, in the first setting unit, a partial discharge test window is reserved on a metal flange of the basin-type insulator using the metal flange.
Further optionally, the area of the partial discharge test window is not less than a preset first threshold,
the width of the partial discharge test window is not less than a preset second threshold value;
and the height of the partial discharge test window is not less than a preset third threshold value.
As a further alternative, it is possible to,
the partial discharge test window is used for coupling discharge signals appearing in the target electrical equipment in the partial discharge test window when the target electrical equipment runs.
As a further alternative, it is possible to,
the preset first threshold is 825 square millimeters,
the preset second threshold value is 15 mm;
the preset third threshold value is 55 mm.
Further optionally, the second checking unit 106 includes:
the first silver coating inspection unit is used for detecting the thickness, the hardness and the bonding strength of a silver coating at a conductive contact part of the target electrical equipment according to silver coating quality standards and detection means provided by manufacturers of the target electrical equipment;
the second silver plating layer inspection unit is used for detecting the silver plating quality of the movable and static contacts of the circuit breaker, the disconnecting switch and the grounding switch in the target electrical equipment, and ensuring that the silver plating layers at the movable and static contacts of the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment do not fall off, copper is not exposed and no obvious metal debris is generated after the circuit breaker, the disconnecting switch and the grounding switch of the target electrical equipment are continuously subjected to at least 200 times of separation and combination operation;
the tank painting inspection unit is used for painting rust-proof or anti-corrosion paint on the interior of the tank in the target electrical equipment, and the paint surface is smooth without abnormal bulges and has good adhesive force;
the switch checking unit is used for checking whether a circuit breaker, a disconnecting switch and a grounding switch of the target electrical equipment meet preset factory test requirements or not;
and the alternating current withstand voltage value checking unit is used for checking that the alternating current withstand voltage value of the target electrical equipment is completely consistent with the factory value of the alternating current withstand voltage value of the target electrical equipment under a preset first voltage condition in a field handover test of the target electrical equipment, and the alternating current withstand voltage value of the target electrical equipment is not lower than a preset fourth threshold value under a preset second voltage condition.
The specific processing flow of each unit included in the apparatus for improving the capability of preventing the electrical device from the sudden short circuit fault may refer to the related description of the method for improving the capability of preventing the electrical device from the sudden short circuit fault, and is not described herein again.
The device for improving the sudden short-circuit fault prevention capability of the electrical equipment, provided by the embodiment of the application, can be applied to equipment for improving the sudden short-circuit fault prevention capability of the electrical equipment, such as a terminal: mobile phones, computers, etc. Optionally, fig. 3 is a block diagram illustrating a hardware structure of a device for improving the capability of preventing the sudden short-circuit fault of the electrical device, and referring to fig. 3, the hardware structure of the device for improving the capability of preventing the sudden short-circuit fault of the electrical device may include: at least one processor 1, at least one communication interface 2, at least one memory 3 and at least one communication bus 4.
In the embodiment of the present application, the number of the processor 1, the communication interface 2, the memory 3, and the communication bus 4 is at least one, and the processor 1, the communication interface 2, and the memory 3 complete mutual communication through the communication bus 4.
The processor 1 may be a central processing unit CPU, or an Application Specific Integrated Circuit ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement the embodiments of the present Application, etc.;
the memory 3 may include a high-speed RAM memory, and may further include a non-volatile memory (non-volatile memory) or the like, such as at least one disk memory;
wherein the memory stores a program and the processor can call the program stored in the memory, the program for: and each processing flow in the scheme that the terminal improves the capability of preventing the sudden short circuit fault of the electrical equipment is realized.
Embodiments of the present application further provide a readable storage medium, where the storage medium may store a program adapted to be executed by a processor, where the program is configured to: and each processing flow of the terminal in the scheme for improving the capability of the electrical equipment for preventing the sudden short circuit fault is realized.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. The various embodiments may be combined with each other. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for improving the capability of electrical equipment in preventing sudden short-circuit fault is characterized by comprising the following steps:
analyzing whether the purchasing technical specification of the target electrical equipment is complete;
if the procurement technical specification of the target electrical equipment is incomplete, revising the procurement technical specification of the target electrical equipment;
if the purchasing technical specification of the target electrical equipment is complete, analyzing whether the purchasing technical specification of the target electrical equipment is effectively implemented or not;
if the purchasing technical specification of the target electrical equipment is not effectively implemented, making a model checking working specification of the target electrical equipment;
checking the effectiveness of a partial discharge live detection device for placing the target electrical equipment on site according to the model checking working specification of the target electrical equipment;
and the dust and foreign matters of the target electrical equipment are checked, so that the capability of preventing sudden short-circuit faults of the target electrical equipment is improved.
2. The method according to claim 1, wherein the checking the validity of the partial discharge live detection device on which the target electrical equipment is placed on site according to the model audit work specification of the target electrical equipment comprises:
adopting a basin-type insulator of a metal flange as an insulator of the target electrical equipment;
and carrying out partial discharge live detection by using an external ultrahigh frequency sensor.
3. The method according to claim 2, wherein the metal flange of the basin-type insulator adopting the metal flange is reserved with a partial discharge test window.
4. The method of claim 3,
the area of the partial discharge test window is not less than a preset first threshold value,
the width of the partial discharge test window is not less than a preset second threshold value;
and the height of the partial discharge test window is not less than a preset third threshold value.
5. The method of claim 3,
the partial discharge test window is used for coupling discharge signals appearing in the target electrical equipment in the partial discharge test window when the target electrical equipment runs.
6. The method of claim 4,
the preset first threshold is 825 square millimeters,
the preset second threshold value is 15 mm;
the preset third threshold value is 55 mm.
7. The method according to any one of claims 1 to 6, wherein the inspecting the target electrical equipment for dust and foreign matter comprises:
detecting the thickness, hardness and bonding strength of a silver coating at the conductive contact part of the target electrical equipment according to silver coating quality standards and detection means provided by manufacturers of the target electrical equipment;
detecting silver plating quality at the movable and fixed contacts of a circuit breaker, an isolating switch and a grounding switch in the target electrical equipment, and ensuring that silver plating layers at the movable and fixed contacts of the circuit breaker, the isolating switch and the grounding switch of the target electrical equipment do not fall off, copper does not expose and obvious metal debris does not generate after the circuit breaker, the isolating switch and the grounding switch of the target electrical equipment are continuously subjected to separation and combination operations for at least 200 times;
when the interior of the tank body in the target electrical equipment is coated with the antirust or anticorrosive paint, the paint surface is smooth without abnormal bulges, and the adhesive force is good;
checking whether a circuit breaker, a disconnecting switch and a grounding switch of the target electrical equipment meet preset delivery test requirements;
in the field handover test of the target electrical equipment, under a preset first voltage condition, the alternating current withstand voltage value of the target electrical equipment is completely consistent with the factory value of the alternating current withstand voltage value of the target electrical equipment, and under a preset second voltage condition, the alternating current withstand voltage value of the target electrical equipment is not lower than a preset fourth threshold value.
8. An apparatus for improving the capability of electrical equipment to prevent sudden short circuit faults, comprising:
the first analysis unit is used for analyzing whether the purchasing technical specification of the target electrical equipment is complete or not;
the revising unit is used for revising the procurement technical specification of the target electrical equipment when the execution result of the first analyzing unit is that the procurement technical specification of the target electrical equipment is not complete;
the second analysis unit is used for analyzing whether the purchase technical specification of the target electrical equipment is effectively implemented or not when the execution result of the first analysis unit is that the purchase technical specification of the target electrical equipment is completed;
the making unit is used for making a model inspection working specification of the target electrical equipment when the execution result of the second analysis unit shows that the purchasing technical specification of the target electrical equipment is not effective;
the first checking unit is used for checking the working specification according to the model of the target electrical equipment and checking the effectiveness of the partial discharge live detection device for placing the target electrical equipment on site;
and the second inspection unit is used for inspecting the dust and foreign matters of the target electrical equipment so as to improve the capability of preventing sudden short-circuit faults of the target electrical equipment.
9. An apparatus for improving the ability of electrical equipment to prevent a sudden short circuit fault, comprising: one or more processors, and a memory;
the memory has stored therein computer readable instructions which, when executed by the one or more processors, carry out the steps of the method of improving the capability of an electrical device to prevent a sudden short circuit fault as claimed in any one of claims 1 to 7.
10. A readable storage medium, characterized by: the readable storage medium has stored therein computer readable instructions which, when executed by one or more processors, cause the one or more processors to carry out the steps of the method of improving the capability of an electrical device to prevent a sudden short circuit fault as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211467077.0A CN115796445A (en) | 2022-11-22 | 2022-11-22 | Method for improving capability of electrical equipment in preventing sudden short circuit fault and related equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211467077.0A CN115796445A (en) | 2022-11-22 | 2022-11-22 | Method for improving capability of electrical equipment in preventing sudden short circuit fault and related equipment |
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| CN115796445A true CN115796445A (en) | 2023-03-14 |
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| CN202211467077.0A Pending CN115796445A (en) | 2022-11-22 | 2022-11-22 | Method for improving capability of electrical equipment in preventing sudden short circuit fault and related equipment |
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