CN117665455A - Objective weight-based dry-type transformer working state detection and evaluation method - Google Patents
Objective weight-based dry-type transformer working state detection and evaluation method Download PDFInfo
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- CN117665455A CN117665455A CN202311655911.3A CN202311655911A CN117665455A CN 117665455 A CN117665455 A CN 117665455A CN 202311655911 A CN202311655911 A CN 202311655911A CN 117665455 A CN117665455 A CN 117665455A
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- transformer
- signal
- working state
- dry
- type transformer
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- 238000011156 evaluation Methods 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 230000002159 abnormal effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 17
- 230000007613 environmental effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention provides a dry-type transformer working state detection and evaluation method based on objective weight, which comprises the following steps: step (1): collecting working information and environment information of a transformer; step (2): calculating the transformer loss; step (3): determining the weight of each signal; step (4): constructing an evaluation matrix; step (5): and judging the working state of the transformer. The invention provides a dry-type transformer working state detection and evaluation method based on objective weight, which can accurately and rapidly judge whether the transformer is abnormal or not, thereby ensuring the safety and reliability of the transformer.
Description
Technical Field
The invention belongs to the technical field of power detection, and particularly relates to a dry-type transformer working state detection and evaluation method based on objective weights.
Background
In the working process of the dry-type transformer, the winding and the iron core can generate heat and vibration phenomena such as the winding, the iron core, the shell and the like can occur due to the magnetostriction of the silicon steel sheet, the distortion of magnetic force lines in the winding, the overlarge electromagnetic force, the vibration of auxiliary equipment and the like. Meanwhile, the working environment of the transformer is complex and diversified, so that the working condition of the dry-type transformer needs to be reliably detected and evaluated to ensure the working reliability of the transformer.
The invention provides a dry-type transformer working state detection and evaluation method based on objective weights, which is characterized in that various working information and environment information of a transformer are collected, an evaluation matrix of the various information is constructed according to the objective weights, a comprehensive state score is obtained through calculation, whether the transformer is abnormal or not is judged according to the score, and then the safety and reliability of the transformer working are ensured.
Disclosure of Invention
The invention provides a dry-type transformer working state detection and evaluation method based on objective weight, which can accurately and rapidly judge whether the transformer is abnormal or not, thereby ensuring the safety and reliability of the transformer.
The invention particularly relates to a dry-type transformer working state detection and evaluation method based on objective weight, which comprises the following steps:
step (1): collecting working information and environment information of a transformer;
step (2): calculating the transformer loss;
step (3): determining the weight of each signal;
step (4): constructing an evaluation matrix;
step (5): and judging the working state of the transformer.
The working information of the transformer comprises an input current signal, an input voltage signal, an output current signal, an output voltage signal, temperature rise, a vibration signal and a discharge current signal; the environmental information includes an ambient temperature, an ambient humidity, and a magnetic field signal.
The specific algorithm for calculating the transformer loss is as follows:
and respectively calculating the output power and the input power of the transformer, and taking the difference value of the output power and the input power as the transformer loss.
The specific method for determining the weight of each signal comprises the following steps:
firstly, carrying out homodromous processing on each signal index;
secondly, calculating the information entropy of the ith signal;
again, the weights ω of the various signals are calculated i 。
The specific method for constructing the evaluation matrix is as followsWherein z is nm Is the mth index of signal n.
The specific method for judging the working state of the transformer comprises the following steps:
first, calculate the optimal solution of the evaluation matrixWherein->Is the optimal value of the mth index;
second, calculate the worst scheme of the evaluation matrixWherein->Is the worst value of the mth index;
again, the distance from the evaluation object to the optimal scheme is calculated
Calculating the distance from the evaluation object to the worst scheme
Again, a status score for each signal is calculated
And finally, judging whether the state score of each signal is smaller than a reference value, if so, judging that the transformer has an abnormal state according to the corresponding signal, and rapidly judging the fault possibility.
Compared with the prior art, the beneficial effects are that: the method for detecting and evaluating the working state of the dry-type transformer acquires various working information and environmental information of the transformer, constructs an evaluation matrix of various information according to objective weights of various different information, calculates to obtain a comprehensive state score, judges whether the transformer is abnormal according to the score, and further ensures the safety and reliability of the working of the transformer.
Drawings
Fig. 1 is a working flow chart of a dry-type transformer working state detection and evaluation method based on objective weight.
Detailed Description
The following describes a specific embodiment of the method for detecting and evaluating the working state of the dry-type transformer based on objective weight in detail with reference to the accompanying drawings.
As shown in fig. 1, the method for detecting and evaluating the working state of the dry-type transformer of the invention comprises the following steps:
step (1): collecting working information and environment information of a transformer;
step (2): calculating the transformer loss;
step (3): determining the weight of each signal;
step (4): constructing an evaluation matrix;
step (5): and judging the working state of the transformer.
The working information of the transformer comprises an input current signal, an input voltage signal, an output current signal, an output voltage signal, temperature rise, a vibration signal and a discharge current signal; the environmental information includes an ambient temperature, an ambient humidity, and a magnetic field signal.
The specific algorithm for calculating the transformer loss is as follows:
and respectively calculating the output power and the input power of the transformer, and taking the difference value of the output power and the input power as the transformer loss.
The method for determining the weight of each signal comprises the steps of outputting a current signal, outputting a voltage signal, increasing temperature, vibrating the signal, discharging the current signal, reducing transformer loss, ambient temperature, ambient humidity and magnetic field signal, and specifically comprises the following steps:
firstly, carrying out homodromous processing on each signal index;
secondly, calculating the information entropy of the ith signal:
wherein a is i For each signal;
again, the weights ω of the various signals are calculated i ，
The specific method for constructing the evaluation matrix is as followsWherein z is nm Is the mth index of signal n.
The specific method for judging the working state of the transformer comprises the following steps:
first, calculate the optimal solution of the evaluation matrixWherein->Is the optimal value of the mth index;
second, calculate the worst scheme of the evaluation matrixWherein->Is the worst value of the mth index;
again, calculating the evaluation object to the most pointDistance of best mode
Calculating the distance from the evaluation object to the worst scheme
Again, a status score for each signal is calculated
And finally, judging whether the state score of each signal is smaller than a reference value, if so, judging that the transformer has an abnormal state according to the corresponding signal, and rapidly judging the fault possibility.
Finally, it should be noted that the above-mentioned embodiments are merely illustrative of the technical solution of the invention and not limiting thereof. It will be understood by those skilled in the art that modifications and equivalents may be made to the particular embodiments of the invention, which are within the scope of the claims appended hereto.
Claims (6)
1. The method for detecting and evaluating the working state of the dry-type transformer based on the objective weight is characterized by comprising the following steps of:
step (1): collecting working information and environment information of a transformer;
step (2): calculating the transformer loss;
step (3): determining the weight of each signal;
step (4): constructing an evaluation matrix;
step (5): and judging the working state of the transformer.
2. The method for detecting and evaluating the working state of the dry-type transformer based on objective weight according to claim 1, wherein the working information of the transformer comprises an input current signal, an input voltage signal, an output current signal, an output voltage signal, a temperature rise signal, a vibration signal and a discharge current signal; the environmental information includes an ambient temperature, an ambient humidity, and a magnetic field signal.
3. The method for detecting and evaluating the working state of the dry-type transformer based on objective weight according to claim 2, wherein the specific algorithm for calculating the transformer loss is as follows: and respectively calculating the output power and the input power of the transformer, and taking the difference value of the output power and the input power as the transformer loss.
4. The method for detecting and evaluating the working state of the dry-type transformer based on objective weights according to claim 3, wherein the specific method for determining the weights of the signals is as follows:
firstly, carrying out homodromous processing on each signal index;
secondly, calculating the information entropy of the ith signal;
again, the weights ω of the various signals are calculated i 。
5. The objective weight-based dry-type transformer working state detection and evaluation method as claimed in claim 4, wherein the specific method for constructing the evaluation matrix is as followsWherein z is nm Is the mth index of signal n.
6. The objective weight-based dry-type transformer working state detection and evaluation method according to claim 5, wherein the specific method for judging the working state of the transformer is as follows:
first, calculate the optimal solution of the evaluation matrixWherein->Is the optimal value of the mth index;
second, calculate the worst scheme of the evaluation matrixWherein->Is the worst value of the mth index;
again, the distance from the evaluation object to the optimal scheme is calculated
Calculating the distance from the evaluation object to the worst scheme
Again, a status score for each signal is calculated
And finally, judging whether the state score of each signal is smaller than a reference value, if so, judging that the transformer has an abnormal state according to the corresponding signal, and rapidly judging the fault possibility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311655911.3A CN117665455A (en) | 2023-12-05 | 2023-12-05 | Objective weight-based dry-type transformer working state detection and evaluation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311655911.3A CN117665455A (en) | 2023-12-05 | 2023-12-05 | Objective weight-based dry-type transformer working state detection and evaluation method |
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| Publication Number | Publication Date |
|---|---|
| CN117665455A true CN117665455A (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311655911.3A Pending CN117665455A (en) | 2023-12-05 | 2023-12-05 | Objective weight-based dry-type transformer working state detection and evaluation method |
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| Country | Link |
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| CN (1) | CN117665455A (en) |
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2023
- 2023-12-05 CN CN202311655911.3A patent/CN117665455A/en active Pending
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