CN113064017A - State maintenance system and state detection method for power generation equipment - Google Patents
State maintenance system and state detection method for power generation equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses a state maintenance system and a state detection method of power generation equipment. The state maintenance system of power generation equipment includes: the information collection module is used for collecting original information, operation information and overhaul test information of the power generation equipment; the state diagnosis and analysis module diagnoses the power generation equipment by applying vibration, oil, infrared, ultrasonic and current monitoring methods according to the original information, the operation information and the overhaul test information of the power generation equipment processed by the information collection module; the result feedback module analyzes the state information of the power generation equipment according to the state diagnosis module, and confirms whether to overhaul or not according to the state information; and the maintenance evaluation module is used for carrying out maintenance on the power generation equipment and evaluating the maintenance effect after the result feedback module confirms the maintenance.
Description
Technical Field
The embodiment of the invention relates to the field of equipment maintenance and state detection in the power industry, in particular to a state maintenance system and a state detection method for power generation equipment.
Background
Due to the fact that planned (regular) maintenance of a traditional equipment management mode has many defects such as overhaul failure and over-repair, in recent years, domestic power enterprises have vigorously tried to implement a state maintenance mode, and through recent practice, the state maintenance mode plays an important role in improving maintenance pertinence.
From the 80 s, the power system in China accelerates the modernization process of maintenance management, actively researches (explores) and gradually carries out state maintenance, and equipment state maintenance test points are carried out in individual power plants. The initial development is fast, and after years of efforts, a certain score is obtained, but the development levels of all regions are unbalanced, and a plurality of pilot works have no obvious results and even have profound failed teaching and training. In fact, the maintenance system of the power generation industry at present mainly aims at regular scheduled maintenance, and the construction and the actual work of the state maintenance system are not deeply developed in the real sense. By the end of 2020, the installed domestic power generation capacity is nearly 20 hundred million kilowatts, the annual maintenance cost is about 45 yuan/kilowatt on average, the total maintenance cost is about 900 hundred million, and the labor cost accounts for about 1/2. The situation that the maintenance items made by the enterprises are lack of sufficient safety and economic evaluation, monitoring equipment is backward or incomplete, the health state of the equipment cannot be fully known, and factors such as economic maintenance and the like are not considered. In a word, an advanced, mature and feasible equipment state maintenance process and method system are urgently needed by power generation enterprises, and a decision and support are provided for maintenance optimization of equipment.
Disclosure of Invention
Therefore, the embodiment of the invention provides a state maintenance system and a state detection method for power generation equipment, and aims to solve the problems of untimely and ineffective maintenance in the maintenance process of the power generation equipment in the prior art.
In order to achieve the above object, an embodiment of the present invention provides the following:
in an aspect of an embodiment of the present invention, there is provided a state repair system of a power generating apparatus, including: the information collection module is used for collecting original information, operation information and overhaul test information of the power generation equipment; the state diagnosis and analysis module diagnoses the power generation equipment by applying vibration, oil, infrared, ultrasonic and current monitoring methods according to the original information, the operation information and the overhaul test information of the power generation equipment processed by the information collection module; the result feedback module analyzes the state information of the power generation equipment according to the state diagnosis module, and confirms whether to overhaul according to the state information; and the maintenance evaluation module is used for carrying out maintenance on the power generation equipment and evaluating the maintenance effect after the result feedback module confirms the maintenance.
Further, the status diagnostic analysis module includes: the online detection module is used for detecting the running state of the power generation equipment in real time; and the off-line detection module is used for detecting the running state of the power generation equipment at variable time.
Further, the offline monitoring module includes: the device comprises a portable mechanical vibration analyzer, a portable infrared and ultraviolet imager, an electrical signal analyzer, an oil quality analyzer, an ultrasonic detector, a noise monitoring analyzer, a stroboscope and a laser thickness gauge.
Further, the state repair system for power generation equipment further includes: and the maintenance module is used for maintaining the power generation equipment after the online monitoring module and the offline monitoring module monitor the abnormal signals of the equipment.
In another aspect of an embodiment of the present invention, there is provided a state detection method of a power generation device, including: collecting parameter information of the power generation equipment; performing state diagnosis analysis according to the parameter information; evaluating the state of the power generation equipment according to the analysis result; and giving out a corresponding overhaul suggestion according to the state evaluation.
Further, collecting parameter information of the power generation equipment specifically comprises: and collecting original information, operation information and overhaul test information of the power generation equipment.
And further, the operation information is diagnosed and analyzed by vibration, oil, infrared, ultrasonic and current monitoring methods.
Further, the original information includes: the system comprises equipment nameplate parameters, design specifications, ordering technical protocols, equipment technical specifications, equipment monitoring reports, type test reports, delivery test reports, transportation records, arrival acceptance records, handover test reports, installation acceptance records, installation debugging reports and engineering drawings.
Further, the operation information includes: the system comprises equipment operation attributes, real-time operation data and information, equipment inspection point inspection data and information, maintenance data and information, operation analysis data and information, fault data and information, defect and defect elimination data and information, start and stop data and information, various off-line detection data and information, on-line operation monitoring detection data and abnormal working condition information.
Further, the overhaul test information includes: the system comprises an examination test report, a performance test report, a diagnostic optimization adjustment test report, a defect and fault record, an overhaul report, a part replacement condition, an equipment shutdown inspection record, an equipment detection report and equipment technical transformation information.
The embodiment of the invention has the following advantages:
the embodiment of the invention discloses a state maintenance system and a state detection method for power generation equipment, which solve the problem of untimely or invalid maintenance caused by the existing maintenance means and method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a schematic flow chart of a method for detecting a state of a power generation device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power generation equipment condition maintenance work flow provided by an embodiment of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
Examples
Referring to the method for maintaining the condition of the power generation equipment and the schematic flow chart of the power generation equipment condition maintenance shown in fig. 1 and 2, an embodiment of the present invention provides a system for maintaining the condition of the power generation equipment, including: the information collection module is used for collecting original information, operation information and overhaul test information of the power generation equipment; the state diagnosis and analysis module diagnoses the power generation equipment by applying vibration, oil, infrared, ultrasonic and current monitoring methods according to the original information, the operation information and the overhaul test information of the power generation equipment processed by the information collection module; the result feedback module analyzes the state information of the power generation equipment according to the state diagnosis module, and confirms whether to overhaul or not according to the state information; and the maintenance evaluation module is used for carrying out maintenance on the power generation equipment and evaluating the maintenance effect after the result feedback module confirms the maintenance.
Specifically, the information collection module is configured to: collecting information before commissioning of power generation equipment, wherein the information before commissioning mainly comprises paper and electronic edition data information such as equipment nameplate parameters, design specifications, order technical protocols, equipment technical specifications, equipment supervision and construction reports, type test reports, delivery test reports, transportation records, arrival goods acceptance records, delivery test reports, installation acceptance records, installation debugging reports, new (modified and expanded) construction engineering related drawings and the like; collecting the operation information of the power generation equipment, wherein the operation information of the equipment mainly comprises equipment operation attributes (such as equipment attribution, operation serial numbers and the like), real-time operation data and information, equipment inspection point inspection data and information, maintenance data and information, operation analysis data and information, fault data and information, defect and defect elimination data and information, start-stop data and information, various off-line detection data and information, on-line operation monitoring detection data, bad (abnormal) working conditions and other information; collecting information such as maintenance tests of power generation equipment, wherein the information mainly comprises assessment test reports, performance test reports (pre-maintenance test reports and post-maintenance test reports), diagnostic optimization adjustment test reports, defect and fault records, maintenance reports, part replacement conditions, equipment shutdown inspection records, equipment detection reports, equipment technology transformation and the like; collecting other information of the power generation equipment, wherein the other information mainly comprises family defects such as equipment defects or hidden danger information and the like of equipment (including main components) in the same manufacturer, the same model and the same batch due to the same common factors such as design, material and process of the manufacturer, related non-execution conditions of anti-accident measures, technical supervision conditions, rectification measures and the like.
Wherein, the state diagnosis analysis module comprises: the online detection module is used for detecting the running state of the power generation equipment in real time; and the offline detection module is used for detecting the running state of the power generation equipment at variable time.
Specifically, the online monitoring module recommends a decision support system (platform) with online synchronous acquisition, real-time display, early warning function and intelligent diagnosis. When a unit is newly built, an auxiliary machine online vibration monitoring analysis, diagnosis and early warning system is comprehensively configured in design. In a service unit, on-line monitoring measuring points (such as vibration, temperature and the like) are incomplete, have a large difference with the requirement and standard for fully developing state maintenance, and are gradually improved and configured by means of technical improvement and the like, and an auxiliary machine state analysis early warning and state maintenance decision support system (platform) is synchronously built.
Specifically, the offline detection module (system) is an important supplement to the online detection module (system) and is also a main auxiliary means for conducting equipment status maintenance, and the offline monitoring module comprises: the device comprises a portable mechanical vibration analyzer, a portable infrared and ultraviolet imager, an electrical signal analyzer, an oil quality analyzer, an ultrasonic detector, a noise monitoring analyzer, a stroboscope and a laser thickness gauge. Each power generation enterprise can be pertinently and selectively configured and perfected step by step according to the requirements.
According to the power generation equipment state maintenance system provided by the embodiment of the invention, the power generation equipment state maintenance system further comprises: and the maintenance module is used for carrying out maintenance operation on the power generation equipment after the online monitoring module and the offline monitoring module monitor the abnormal signals of the equipment.
In the embodiment of the invention, the online detection module and the offline detection module detect the equipment according to the preset detection standard.
The preset detection standard of the rotating equipment can be as follows: GB/T6075.2-2012, mechanical vibration, measuring the vibration of the evaluation machine on a non-rotating part, section 2: the power generation system comprises a land-mounted steam turbine and a land-mounted generator with the rated rotation speed of more than 50MW, 1500r/min, 1800r/min, 3000r/min and 3600 r/min; GB/T11348.2-2012, mechanical vibration, vibration of the evaluation machine measured on a rotating shaft, part 2: the output power is more than 50MW, and the rated rotating speed is 1500r/min, 1800r/min, 3000r/min and 3600 r/min.
The preset monitoring standard of the bearing temperature of the rotating equipment is specifically as follows: the temperature monitoring and state evaluation standards of the bearings of the rotating equipment are preferably implemented according to the standards provided by manufacturers or operation manuals. The temperature requirements of key parts in operation are provided by common manufacturers, in actual operation, along with the change of environmental temperature or regional difference, the temperature change of bearings of some rotating supporting parts is very obvious, and if the same standard is used, great deviation can be generated on the standard for judging the normal state and the abnormal or dangerous state of equipment. The long-term temperature trend tracking of the important parts is suitable, and the rules of the important parts and the working condition changes such as the environmental temperature, the load, the rotating speed and the like are summarized through specific statistical analysis. After comprehensive evaluation and reference to relevant standards, the normal bearing temperature rise is not suitable to exceed 35-40 ℃ of the ambient temperature.
Further, the preset detection standard further includes: and (5) monitoring the quality of the lubricating oil of the rotating equipment.
Referring to the condition maintenance method of the power generation equipment and the schematic diagram of the condition maintenance work flow of the power generation equipment shown in fig. 1 and 2, an embodiment of the present invention provides a condition detection method of the power generation equipment, including: s1, collecting parameter information of the power generation equipment; s2, performing state diagnosis and analysis according to the parameter information; s3, evaluating the state of the power generation equipment according to the analysis result; and S4, giving corresponding maintenance suggestions according to the state evaluation. In step S3, the power-generation-saving equipment is evaluated and determined according to a preset rule.
Specifically, the state quantity of the power generation equipment can be acquired from information before commissioning, operation information, overhaul test information and other information of the equipment, and the acquisition mode comprises the following steps: on-line monitoring, off-line detection, itinerant inspection, test inspection, information obtained by technical supervision and the like. The importance degree of the state quantity is divided into four grades from light to heavy, wherein the grades are respectively 1 grade, 2 grade, 3 grade and 4 grade, and the influence factors are 1, 2, 3 and 4, and are shown in the following table. Here, level 1 and level 2 correspond to general state quantities, and level 3 and level 4 correspond to important state quantities.
| Degree of importance | Level 1 | Stage 2 | Grade 3 | 4 stage |
| Influencing factor | 1 | 2 | 3 | 4 |
The deterioration degree of the state quantity is divided into four grades from light to heavy, namely, grade I, grade II, grade III and grade IV, and the corresponding basic deduction values are 2, 4, 8 and 10, which are shown in the following table.
| Degree of deterioration | Class I | Stage II | Class III | IV stage |
| Basic deduction value | 2 | 4 | 8 | 10 |
The deterioration degree of the quantitative state quantity can also be interval grade according to the size of the state quantity, and the basic deduction value is determined by adopting a linear interpolation method. The specific calculation method is as follows: knowing that a certain state quantity is x0、x1Radical of (i) hourEach of the deduction values is y0、y1When the state quantity is x between the two, the basic deduction value y is calculated according to the formula (1), the calculation method is more accurate than a quantitative state quantity degradation degree deduction method, a linear interpolation method is recommended to be adopted for calculation in the implementation process, and the calculation formula of the formula (1) is as follows:
the deduction value of the state quantity is determined by the importance degree of the state quantity and the deterioration degree of the state quantity, namely the deduction value of the state quantity is equal to the basic deduction value of the state quantity multiplied by an influence factor, see formula (2), the deterioration degree of the state quantity is recommended to be divided into sections according to the size of the state quantity, the basic deduction value is calculated by adopting a linear interpolation method, and all the deduction values of the state quantity are used as a standard. Wherein, the formula (2) is specifically as follows: the state variable is given by the base credit x the impact factor.
State quantity deduction value calculation table
In the method for detecting the state of the power generation equipment in the embodiment of the present invention, collecting parameter information of the power generation equipment specifically includes: and collecting original information, operation information and overhaul test information of the power generation equipment.
In the state detection method of the power generation equipment, the operation information is diagnosed and analyzed by vibration, oil, infrared, ultrasonic and current monitoring methods.
In a state detection method of a power generation device, original information includes: the system comprises equipment nameplate parameters, design specifications, ordering technical protocols, equipment technical specifications, equipment monitoring reports, type test reports, delivery test reports, transportation records, arrival acceptance records, handover test reports, installation acceptance records, installation debugging reports and engineering drawings.
In the state detection method of a power generation device, the operation information includes: the system comprises equipment operation attributes, real-time operation data and information, equipment inspection point inspection data and information, maintenance data and information, operation analysis data and information, fault data and information, defect and defect elimination data and information, start and stop data and information, various off-line detection data and information, on-line operation monitoring detection data and abnormal working condition information.
The overall evaluation of the power generation equipment specifically comprises the following steps: the overall evaluation should integrate the evaluation results of all the components. When all the component evaluations were in the normal state, the whole was evaluated as the normal state. When any one of the main component states is an abnormal state, the overall evaluation should be the most serious state. The overall evaluation is preferably carried out in a mode of combining dynamic evaluation and periodic evaluation, and a corresponding maintenance strategy is formulated according to the evaluation result. Carrying out state detection on the equipment every week, and analyzing and summarizing the equipment state information; the evaluation is not less than once every quarter for key parts or parts which are easy to fail; the whole equipment evaluation is not less than once per year, and the evaluation is summarized and archived in a report form. Besides the conventional evaluation of the whole equipment components, the equipment is subjected to a thermal state performance test if necessary according to the evaluation result of the current equipment, and the overall performance state of the equipment is judged by comparing and analyzing the operating efficiency, the load carrying capacity, the design value and the evaluation report in the past year.
Further, the result feedback module analyzes the state information of the power generation equipment according to the state diagnosis module, and confirms whether to overhaul according to the state information. And the result feedback module gives out a maintenance strategy. The basic principle of maintenance strategy formulation is as follows: according to various key information fusion technologies, through means of state evaluation, risk evaluation and the like, maintenance decision is scientifically determined, so that low cost, high quality and high efficiency are achieved, and the reliability of equipment is improved. And (4) establishing a maintenance strategy according to the evaluation result of the health state of the equipment. And secondly, the state maintenance strategy comprises the formulation of an annual maintenance plan, test, maintenance without shutdown and the like. And the maintenance strategy should be dynamically adjusted according to the evaluation result of the equipment state. And thirdly, the parts evaluated as abnormal states in the equipment need to be timely or opportunistically arranged for maintenance or listed in the next maintenance plan, eliminated in the maintenance and restored to the normal states.
The power generation equipment or system comprises a body and an auxiliary system (equipment), and when any one of the attention state, the abnormal state and the serious state occurs, the current highest level is taken as the standard, and a corresponding maintenance strategy is made according to an equipment evaluation result. The method specifically comprises the following steps:
equipment system overhaul policy table
| Device status | Normal state | Attention status | Abnormal state | Severe state |
| Maintenance strategy | See the following (1) | See the following (2) | See the following (3) | See the following (4) |
| Recommendation cycle | Normal cycle or prolonged by one year | Not greater than normal period | Timely arrangement | Arrange as soon as possible |
Wherein, (1) maintenance strategy of normal condition: the power generation equipment which is evaluated as the normal state can be overhauled according to the normal overhaul period or prolonged by one year, and is arranged to be overhauled by combining routine tests; (2) attention to the maintenance strategy of the state: if the evaluation result is the attention state due to the deduction of a single state quantity, the power generation equipment which is evaluated as the attention state can be arranged and checked according to the actual situation, and if the evaluation result is the attention state due to the deduction of a plurality of state quantities, the power generation equipment can be executed according to the normal cycle, and necessary overhaul or test contents are added according to the actual situation of the power generation equipment; (3) maintenance strategy of abnormal state: the power generation equipment which is evaluated to be in an abnormal state is timely or randomly selected to arrange maintenance according to the evaluation result; (4) maintenance strategy in severe condition: the power generation equipment evaluated as "serious condition" is scheduled for maintenance as soon as possible based on the evaluation result.
In the state detection method of power generation equipment, the overhaul test information includes: the system comprises an examination test report, a performance test report, a diagnostic optimization adjustment test report, a defect and fault record, an overhaul report, a part replacement condition, an equipment shutdown inspection record, an equipment detection report and equipment technical transformation information.
Further, as shown in fig. 2, an evaluation of the overhaul is required when the overhaul is completed. And carrying out verification and evaluation work after equipment maintenance. After the equipment is overhauled, effect evaluation is carried out within one month after the equipment is started, whether state overhaul work is necessary or not is evaluated, whether the fault problem can be accurately judged and solved or not is judged, whether the expected effect (method means, performance index, income and the like) is achieved or not is judged, and whether the running state of an equipment system reaches a good level or not is judged.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A condition maintenance system for power generation equipment, comprising:
the information collection module is used for collecting original information, operation information and overhaul test information of the power generation equipment;
the state diagnosis and analysis module diagnoses the power generation equipment by applying vibration, oil, infrared, ultrasonic and current monitoring methods according to the original information, the operation information and the overhaul test information of the power generation equipment processed by the information collection module;
the result feedback module analyzes the state information of the power generation equipment according to the state diagnosis module, and confirms whether to overhaul according to the state information;
and the maintenance evaluation module is used for carrying out maintenance on the power generation equipment and evaluating the maintenance effect after the result feedback module confirms the maintenance.
2. The condition maintenance system of power generation equipment according to claim 1, characterized in that the condition diagnosis analysis module includes:
the online detection module is used for detecting the running state of the power generation equipment in real time;
and the off-line detection module is used for detecting the running state of the power generation equipment at variable time.
3. The power plant condition maintenance system of claim 2, wherein the offline monitoring module comprises:
the device comprises a portable mechanical vibration analyzer, a portable infrared and ultraviolet imager, an electrical signal analyzer, an oil quality analyzer, an ultrasonic detector, a noise monitoring analyzer, a stroboscope and a laser thickness gauge.
4. The condition maintenance system of power generation equipment according to claim 2, characterized by further comprising:
and the maintenance module is used for maintaining the power generation equipment after the online monitoring module and the offline monitoring module monitor the abnormal signals of the equipment.
5. A method of detecting a state of a power generating apparatus, comprising:
s1, collecting the parameter information of the power generation equipment;
s2, performing state diagnosis and analysis according to the parameter information;
s3, evaluating the state of the power generation equipment according to the analysis result;
and S4, giving out corresponding maintenance suggestions according to the state evaluation.
6. The method for detecting the state of power generation equipment according to claim 5, wherein collecting parameter information of power generation equipment specifically comprises:
and collecting original information, operation information and overhaul test information of the power generation equipment.
7. The state detection method of a power generation device according to claim 6,
and diagnosing and analyzing the operation information by vibration, oil liquid, infrared, ultrasonic and current monitoring methods.
8. The state detection method of a power generation device according to claim 6, characterized in that the original information includes:
the system comprises equipment nameplate parameters, design specifications, ordering technical protocols, equipment technical specifications, equipment monitoring reports, type test reports, delivery test reports, transportation records, arrival acceptance records, handover test reports, installation acceptance records, installation debugging reports and engineering drawings.
9. The state detection method of power generation equipment according to claim 6, characterized in that the operation information includes:
the system comprises equipment operation attributes, real-time operation data and information, equipment inspection point inspection data and information, maintenance data and information, operation analysis data and information, fault data and information, defect and defect elimination data and information, start and stop data and information, various off-line detection data and information, on-line operation monitoring detection data and abnormal working condition information.
10. The status detection method of power generation equipment according to claim 6, wherein the overhaul test information includes:
the system comprises an examination test report, a performance test report, a diagnostic optimization adjustment test report, a defect and fault record, an overhaul report, a part replacement condition, an equipment shutdown inspection record, an equipment detection report and equipment technical transformation information.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114006475A (en) * | 2021-11-01 | 2022-02-01 | 西安热工研究院有限公司 | Power plant digital medium-voltage switch equipment intelligent management system |
| CN114325215A (en) * | 2021-11-22 | 2022-04-12 | 国网湖南省电力有限公司 | Intensive detection system for power equipment state and application method thereof |
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| CN103914791A (en) * | 2014-03-17 | 2014-07-09 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Electrical equipment state maintenance system |
| CN104638764A (en) * | 2015-01-22 | 2015-05-20 | 国家电网公司 | Intelligent state diagnosis and overhauling system for power distribution network equipment |
| CN108491990A (en) * | 2018-01-27 | 2018-09-04 | 北京天润新能投资有限公司 | A kind of wind farm device state evaluation and maintenance decision support detection method and system |
| CN110826733A (en) * | 2019-10-24 | 2020-02-21 | 华电邹县发电有限公司 | Maintenance decision method based on power generation equipment running state comprehensive evaluation model |
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| CN114325215A (en) * | 2021-11-22 | 2022-04-12 | 国网湖南省电力有限公司 | Intensive detection system for power equipment state and application method thereof |
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