CN112285631A - Judgment method and system for active early warning of current transformer - Google Patents
Judgment method and system for active early warning of current transformer Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000007547 defect Effects 0.000 claims description 43
- 238000012544 monitoring process Methods 0.000 claims description 25
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- 238000004458 analytical method Methods 0.000 claims description 13
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 12
- 238000013021 overheating Methods 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
- 230000009474 immediate action Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 16
- 230000009466 transformation Effects 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
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Abstract
The invention relates to a current transformer active early warning method and a system, which are used for uniformly collecting and analyzing various kinds of data of operation, detection and transformation, performing single state information quantity early warning and comprehensive state information quantity early warning according to the collected state information quantity, and designing early warning algorithms of various early warning modes, thereby improving the early warning reliability of the current transformer and helping transformer substation operation and maintenance personnel to find the problem of the current transformer in advance for processing.
Description
Technical Field
The invention relates to the technical field related to operation inspection of a transformer substation, in particular to a judgment method and a judgment system for active early warning of a current transformer in the transformer substation.
Background
At present, the operation and inspection work of the transformer substation is mainly carried out in a combined mode of equipment monitoring and manual inspection of operation and inspection personnel. And the main equipment monitoring system in the safety I area collects the operation data of the power transformation main equipment, and the auxiliary equipment monitoring system in the safety III area collects the data of the auxiliary equipment. The information of the main and auxiliary equipment is displayed in a centralized mode on the operation and inspection workstation, and when faults and abnormity occur, the monitoring system gives an alarm and reminds operation and inspection personnel to go to a problem site for further judgment and processing. Meanwhile, the operation and maintenance inspection personnel regularly perform operation and maintenance inspection, live detection, power failure tests and the like on various power transformation equipment, and comprehensively inspect the state of the equipment.
Because the internal sensing technology of various equipment in the transformer substation is incomplete, the monitoring means is incomplete, the accuracy of partial online monitoring data is poor, the effectiveness is not strong, and the actual condition of the equipment is difficult to accurately reflect. The monitoring data of the main and auxiliary equipment accumulated in the station lacks effective management and analysis means, the state of the equipment cannot be automatically analyzed and evaluated, various kinds of information need to be manually integrated for screening and evaluation when abnormity occurs, the workload is large, the efficiency is low, and the accuracy is uncontrollable. The problems of independence of various monitoring systems, dispersion of interfaces, incomplete equipment coverage and incapability of effectively sharing information of main and auxiliary equipment exist at the same time, equipment operation data acquired by various monitoring means cannot be effectively utilized, various main equipment failure problems cannot be early warned in advance, equipment failure and even shutdown are caused, and great threat is caused to the operation of a transformer substation; meanwhile, the power transformation operation and maintenance personnel lack effective monitoring means for equipment, a large amount of work is controlled manually, after the equipment generates abnormal states or faults, fault judgment and treatment mainly depend on manual experience, the reaction time is long, the treatment efficiency is low, the effect is poor, the equipment state can not be prepared and diagnosed by the operation and maintenance personnel, and the faults can not be effectively avoided.
Disclosure of Invention
Aiming at the problems, the invention provides a method and a system for judging active early warning of a current transformer. By adhering to a data sharing concept and fully playing informatization technical means such as 'cloud large object moving chain' and the like, the operation information of main and auxiliary equipment in a station is fully integrated, the edge computing capability of a monitoring host in the station is utilized, various data of operation and detection power transformation are collected and analyzed in a unified manner, an active early warning model of a current transformer is established, full-dimensional state data of the power transformation power transformer is collected, various discrimination rules and models are applied, basic information, real-time operation state, on-line monitoring, live detection, measure countermeasure troubleshooting, bad working conditions, defects, overhauling, testing and other data of the equipment are automatically analyzed, and early warning is sent out in advance to realize the intelligent management, intelligent diagnosis and active early warning functions of the equipment and assist operation personnel in carrying out equipment early warning, defect analysis and decision processing. And the abnormity of the equipment is found and treated in advance, and the safety level of the power grid and the equipment is improved.
In order to achieve the above object, according to an aspect of the present invention, there is provided an active early warning method for a current transformer, including:
acquiring state information quantity of a multi-dimensional representation current transformer state;
and carrying out comprehensive state information quantity early warning according to the state information quantity:
when the selected main state information quantity exceeds a first early warning threshold value, carrying out red early warning;
and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule.
Further, the red warning indicates that immediate action is required, the yellow warning indicates that intensive monitoring or further analysis is required, and the blue warning indicates that attention or tracking analysis is required.
Further, the comprehensive state information quantity early warning comprises discharge defect early warning, insulation moisture defect early warning and connector overheating defect early warning.
Further, in the discharge defect warning, the main status information includes acetylene content, the auxiliary status information includes hydrogen, total hydrocarbons, oil level, and oil pressure, and the first threshold is 1ppm, including:
when the acetylene content is more than or equal to 1ppm, a red early warning is sent out;
when 0.1ppm or less acetylene content <1ppm, referring to the state of the auxiliary state information amount:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out;
when all items in the auxiliary state information quantity are in a normal state, a blue early warning is sent out;
and when the state of the auxiliary state information quantity is other than the state, sending out a yellow early warning.
Further, in the insulation moisture defect early warning, the main status information amount includes hydrogen content, the auxiliary status information amount includes micro-water, total hydrocarbons, oil level, oil pressure and relative dielectric loss, the first threshold value is 150ppm, including:
when the hydrogen content is more than or equal to 150ppm, a red early warning is sent out;
when 10ppm or less acetylene content <150ppm, referring to the state of the auxiliary state information quantity:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out;
when all items in the auxiliary state information quantity are in a normal state, a blue early warning is sent out;
and when the state of the auxiliary state information quantity is other than the state, sending out a yellow early warning.
Further, in the early warning of the overheating defect of the joint, the main status information amount includes an infrared hot spot temperature, the auxiliary status information amount includes a real-time load current and an ambient temperature, the first threshold is 80 ℃, and the method includes:
when the temperature of the infrared hot spot is more than or equal to 80 ℃, a red early warning is sent out;
when the ambient temperature is more than or equal to 10 ℃ and the infrared hotspot temperature is less than 80 ℃, referring to the state of the auxiliary state information quantity:
converting the temperature TN under the condition of 100% line load current according to the real-time load current and the ambient temperature;
when TN is more than or equal to 110 ℃, a yellow early warning is sent out;
when TN <110 ℃, a blue warning is given.
Further, before the comprehensive state information quantity early warning, single state information quantity early warning is also included:
and when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, a red early warning is sent out, otherwise, a comprehensive state information quantity early warning is entered.
According to another aspect of the invention, an active early warning system for a current transformer is provided, which comprises a state information quantity acquisition module, a single state information quantity early warning module and a comprehensive state information quantity early warning module; wherein,
the state information quantity acquisition module acquires state information quantity representing the state of the current transformer in a multidimensional way and outputs the state information quantity to the single state information quantity early warning module and the comprehensive state information quantity early warning module;
the single state information quantity early warning module sends out a red early warning when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, and otherwise, enters the comprehensive state information quantity early warning module;
the comprehensive state information quantity early warning module carries out red early warning when the selected main state information quantity exceeds a first early warning threshold value; and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule.
Further, the red warning indicates that immediate action is required, the yellow warning indicates that intensive monitoring or further analysis is required, and the blue warning indicates that attention or tracking analysis is required.
Furthermore, the comprehensive state information quantity early warning module comprises a discharge defect early warning module, an insulation moisture defect early warning module and a connector overheating defect early warning module.
In summary, the invention provides an active early warning method and system for a current transformer, which collect and analyze various kinds of data of operation, inspection and power transformation in a unified manner, perform early warning of single state information quantity and early warning of comprehensive state information quantity according to the collected state information quantity, and design early warning algorithms of various early warning modes, thereby improving the early warning reliability of the current transformer and helping operation and maintenance personnel of a transformer substation find and process the problem of the current transformer in advance.
Drawings
Fig. 1 is a schematic structural diagram of a power transformation operation and maintenance class integrated monitoring system applied to the active early warning method of the current transformer of the invention;
fig. 2 is a flowchart of an implementation of an active early warning method for a current transformer according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating an implementation of an active warning method for a current transformer according to another embodiment of the present invention;
fig. 4 is a structural block diagram of the active early warning system of the current transformer of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical scheme of the invention is explained in detail below, and the invention provides an active early warning method and system for a current transformer. Fig. 1 shows a schematic structural diagram of a power transformation operation and maintenance class integrated monitoring system applied to the current transformer active early warning method and system of the present invention, as shown in fig. 1, the current transformer active early warning system is deployed in a power system security IV area, and information representing a state of a current transformer is obtained through an inspection host and a video monitoring host at an access station end, and a main and auxiliary device integrated monitoring host in a power system security II area. And a main and auxiliary equipment integrated monitoring host in the safety II area of the power system is connected with the current transformer active early warning system through a forward isolation system.
According to an embodiment of the present invention, there is provided an active early warning method for a current transformer, where an implementation flowchart of the method is shown in fig. 2, and the method includes:
and acquiring state information quantity of the state of the multi-dimensional representation current transformer. The related state information quantity is various information directly or indirectly representing the state of the equipment, and comprises the following types of state quantities:
(1) basic data: the basic information of the device mainly comprises: nameplate parameters, type test reports, factory test reports, and the like.
(2) Operation information: the operation information of the equipment mainly comprises: recording information of the running condition of the equipment, recording the defects and the abnormalities of the equipment over the years, voltage and current information and the like.
(3) And (3) routing inspection information: the inspection data of the equipment mainly comprises: infrared, oil level inspection and the like.
(4) Maintenance data: various detection and defect information of the equipment.
(5) And (3) online monitoring data: and various types of equipment monitor the obtained information on line.
And carrying out comprehensive state information quantity early warning according to the state information quantity:
when the selected main state information quantity exceeds a first early warning threshold value, carrying out red early warning;
and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule.
The active early warning level of the current transformer is divided into three levels on the whole, the active early warning signal is divided into three types of blue early warning, yellow early warning and red early warning according to the severity and the emergency degree of the influence on the safe operation of equipment, and different emergency, detection and maintenance strategies are adopted according to different early warning levels. The red early warning shows that the state information quantity of the equipment exceeds the relevant standard limit value, or the change trend is obvious, the equipment has defects possibly, and the equipment possibly develops into a fault, and corresponding measures are urgently needed to be taken. The yellow early warning indicates that the variation trend of the equipment state information quantity is developed towards the direction of the standard limit value, but the variation trend does not exceed the standard limit value, so that the equipment has potential hazards and needs to be monitored intensively or analyzed and evaluated further. The blue early warning indicates that the single or partial state information quantity of the equipment is abnormal, the operation of the equipment is not influenced for the moment, and the equipment is in a state only needing attention or tracking analysis.
In order to represent the importance degree of the state information quantity representing the state of the current transformer, the types of the state information are divided into the following two types:
amount of main status information: when the comprehensive state information quantity early warning is carried out, the state information quantity of the active early warning process can be started after the threshold value is reached.
Amount of auxiliary status information: and when the comprehensive state information quantity early warning is carried out, the state information quantity of the early warning level is judged in the early warning process.
The data sources of the state information quantity representing the state of the current transformer are shown in table 1:
TABLE 1
According to some embodiments, the comprehensive state information content pre-warning includes a discharge defect pre-warning, an insulation moisture defect pre-warning, and a joint overheating defect pre-warning. The prediction strategies for various pre-warning modes are explained in detail below.
Factors related to the cause of the discharge defect include: the interior of the end screen contains air bubbles, impurity particles, insulation damage and other defects, potential suspension, internal discharge, open circuit, looseness and other internal defects, and the internal connection of the end screen is poor. In the discharge defect early warning, the main state information amount is acetylene content, the auxiliary state information amount is hydrogen, total hydrocarbon, oil level and oil pressure, the first threshold value is 1, and the method comprises the following steps:
when the acetylene content is more than or equal to 1ppm, a red early warning is sent out; the operation inspection strategy is to maintain the power failure as soon as possible and enhance inspection before the power failure;
when 0.1ppm or less acetylene content <1ppm, referring to the state of the auxiliary state information amount:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out; the operation inspection strategy is to maintain the power failure as soon as possible and enhance inspection before the power failure;
when all items in the auxiliary state information quantity are in a normal state, a blue early warning is sent out; the operation and inspection strategy is continuous tracking and focuses on the acetylene change trend;
when the state of the auxiliary state information quantity is other than the state, a yellow early warning is sent out; the operation and inspection strategies comprise continuous tracking, shortening of the oil extraction chromatographic analysis period, infrared enhancement, professional oil level inspection and the like.
Information such as main state quantity, auxiliary state quantity, early warning level, operation and inspection strategy related to discharge defect early warning is shown in table 2:
TABLE 2
Factors related to the cause of insulation moisture defects are: the external water inlet and metal expander installation process is poorly controlled, and the drying process is poorly controlled. In insulating defect early warning that wets, main state information volume is hydrogen content, and supplementary state information volume is for minute water, total hydrocarbon, oil level, oil pressure and relative dielectric loss, and first threshold value is 150, includes:
when the hydrogen content is more than or equal to 150ppm, a red early warning is sent out, the operation and inspection strategy is to power off maintenance as soon as possible, and routing inspection is enhanced before power off;
when 10ppm or less acetylene content <150ppm, referring to the state of the auxiliary state information quantity:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out, the operation and inspection strategy is power failure maintenance as soon as possible, and routing inspection is strengthened before power failure;
when all items in the auxiliary state information quantity are in normal states, a blue early warning is sent out, the operation and inspection strategy is continuous tracking, and the hydrogen variation trend is concerned;
and when the state of the auxiliary state information quantity is other than the above state, a yellow early warning is sent out, and the operation and inspection strategy comprises continuous tracking, shortening of the oil extraction chromatographic analysis period, strengthening of infrared and oil level professional inspection and the like.
Information such as main state quantity, auxiliary state quantity, early warning level, operation and inspection strategy related to the early warning of the insulation moisture defect is shown in table 3:
TABLE 3
Factors related to the cause of the overheating defect of the joint are: the series and parallel rows are poorly connected, the load current is too large, and the contact of the joint is poor. Main state information volume is infrared hot spot temperature in the overheated defect early warning of joint, and supplementary state information volume is real-time load current and ambient temperature, and first threshold value is 80, includes:
when the temperature of the infrared hot spot is more than or equal to 80 ℃, a red early warning is sent out; the operation inspection strategy is to maintain the power failure as soon as possible and enhance inspection before the power failure;
when the ambient temperature is more than or equal to 10 ℃ and the infrared hotspot temperature is less than 80 ℃, referring to the state of the auxiliary state information quantity:
converting the temperature TN under the condition of 100% line load current according to the real-time load current and the ambient temperature;
when TN is more than or equal to 110 ℃, a yellow early warning is sent out; the operation and inspection strategy comprises continuous tracking, inspection enhancement, relative temperature difference analysis, and power failure treatment at the peak-meeting time before summer
When TN is less than 110 ℃, a blue early warning is sent out; the operation and inspection strategy is continuous tracking and focuses on the hot spot temperature change trend.
Information such as main state quantity, auxiliary state quantity, early warning level, operation and inspection strategy related to the early warning of the overheating defect of the joint is shown in table 4:
TABLE 4
According to another embodiment of the present invention, before the early warning of the comprehensive status information amount, the early warning of the single status information amount is further included, and an implementation flowchart of the early warning method in this embodiment is shown in fig. 3, and includes:
and when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, a red early warning is sent out, otherwise, a comprehensive state information quantity early warning is entered.
The early warning classification, the state quantity, the early warning rule and the operation and inspection strategy related to the early warning of the single state information quantity of the current transformer provided by the embodiment are shown in table 5:
TABLE 5
According to a third embodiment of the invention, an active early warning system of a current transformer is provided, which comprises a state information quantity acquisition module, a single state information quantity early warning module and a comprehensive state information quantity early warning module; wherein,
the state information quantity acquisition module acquires state information quantity representing the state of the current transformer in a multidimensional way and outputs the state information quantity to the single state information quantity early warning module and the comprehensive state information quantity early warning module;
the single state information quantity early warning module sends out a red early warning when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, and otherwise, enters the comprehensive state information quantity early warning module;
the comprehensive state information quantity early warning module carries out red early warning when the selected main state information quantity exceeds a first early warning threshold value; and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule. The comprehensive state information quantity early warning module comprises a discharge defect early warning module, an insulation moisture defect early warning module and a connector overheating defect early warning module.
In the above-mentioned early warning system, each early warning module implements the early warning method as described in the first and second embodiments of the present invention, and details are not repeated herein.
In summary, the present invention provides a current transformer active early warning method and system, wherein the current transformer active early warning system deployed in the electric power safety IV area is used to classify the current transformer early warning categories into insulation moisture defect early warning, discharge defect early warning, connector overheating defect early warning, and the like according to the severity and urgency degree of the impact on the safe operation of the equipment by accessing the basic information, operation information, inspection information, maintenance data, online monitoring, and the like of the equipment. And the colors of the active early warning signals are divided into three types of blue early warning, yellow early warning and red early warning, and different emergency, detection and maintenance strategies are adopted according to different early warning levels. The active early warning mode of the current transformer is divided into single early warning of single state quantity and comprehensive early warning of multiple state quantities. And if the state information quantity exceeds the single state quantity early warning rule requirement value, performing red early warning, and if the state information quantity does not exceed the single state quantity early warning rule requirement value, performing comprehensive state information quantity early warning. The system accesses multisource heterogeneous monitoring data of the current transformer equipment through a plurality of monitoring subsystems and performs active early warning algorithm analysis in the system. And obtaining an auxiliary decision through multi-dimensional analysis of the state information of various current transformers. And before the current transformer fails, early warning is carried out in advance, and operation and maintenance personnel are assisted to make emergency, detection or maintenance decisions.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. An active early warning method for a current transformer is characterized by comprising the following steps:
acquiring state information quantity of a multi-dimensional representation current transformer state;
and carrying out comprehensive state information quantity early warning according to the state information quantity:
when the selected main state information quantity exceeds a first early warning threshold value, carrying out red early warning;
and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule.
2. The method of claim 1, wherein the red alert indicates immediate action to be taken, the yellow alert indicates enhanced monitoring or further analysis, and the blue alert indicates attention or follow-up analysis.
3. The method of claim 1, wherein the comprehensive status information content pre-warning comprises a discharge defect pre-warning, an insulation wetting defect pre-warning, and a joint overheating defect pre-warning.
4. The method according to claim 3, wherein in the discharge defect warning, the main state information amount includes acetylene content, the auxiliary state information amount includes hydrogen, total hydrocarbons, oil level, and oil pressure, and the first threshold value is 1ppm, and includes:
when the acetylene content is more than or equal to 1ppm, a red early warning is sent out;
when 0.1ppm or less acetylene content <1ppm, referring to the state of the auxiliary state information amount:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out;
when all items in the auxiliary state information quantity are in a normal state, a blue early warning is sent out;
and when the state of the auxiliary state information quantity is other than the state, sending out a yellow early warning.
5. The method of claim 3, wherein in the insulation moisture defect pre-warning, the primary status information comprises hydrogen content, the secondary status information comprises micro-water, total hydrocarbons, oil level, oil pressure and relative medium loss, and the first threshold is 150ppm, comprising:
when the hydrogen content is more than or equal to 150ppm, a red early warning is sent out;
when 10ppm or less acetylene content <150ppm, referring to the state of the auxiliary state information quantity:
when at least one item of the auxiliary state information quantity exceeds the respective early warning threshold value, a red early warning is sent out;
when all items in the auxiliary state information quantity are in a normal state, a blue early warning is sent out;
and when the state of the auxiliary state information quantity is other than the state, sending out a yellow early warning.
6. The method of claim 3, wherein in the early warning of the joint overheating defect, the primary status information comprises an infrared hot spot temperature, the secondary status information comprises a real-time load current and an ambient temperature, and the first threshold is 80 ℃, and comprises:
when the temperature of the infrared hot spot is more than or equal to 80 ℃, a red early warning is sent out;
when the ambient temperature is more than or equal to 10 ℃ and the infrared hotspot temperature is less than 80 ℃, referring to the state of the auxiliary state information quantity:
converting the temperature TN under the condition of 100% line load current according to the real-time load current and the ambient temperature;
when TN is more than or equal to 110 ℃, a yellow early warning is sent out;
when TN <110 ℃, a blue warning is given.
7. The method of any of claims 1-6, further comprising, prior to the integrated state information quantity pre-warning, a single state information quantity pre-warning:
and when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, a red early warning is sent out, otherwise, a comprehensive state information quantity early warning is entered.
8. An active early warning system of a current transformer is characterized by comprising a state information quantity acquisition module, a single state information quantity early warning module and a comprehensive state information quantity early warning module; wherein,
the state information quantity acquisition module acquires state information quantity representing the state of the current transformer in a multidimensional way and outputs the state information quantity to the single state information quantity early warning module and the comprehensive state information quantity early warning module;
the single state information quantity early warning module sends out a red early warning when the state information quantity in the single state information quantity early warning exceeds a second early warning threshold value, and otherwise, enters the comprehensive state information quantity early warning module;
the comprehensive state information quantity early warning module carries out red early warning when the selected main state information quantity exceeds a first early warning threshold value; and when the selected main state information quantity does not exceed the first early warning threshold value, referring to the state of the auxiliary state information quantity, and performing one of red early warning, yellow early warning and blue early warning according to a preset rule.
9. The system of claim 8, wherein the red alert indicates immediate action to be taken, the yellow alert indicates enhanced monitoring or further analysis, and the blue alert indicates attention or follow-up analysis.
10. The system of claim 9, wherein the comprehensive state information content early warning module comprises a discharge defect early warning module, an insulation moisture defect early warning module, and a joint overheating defect early warning module.
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