CN110823086A - Transformer winding deformation analysis method and device, computer device and storage medium - Google Patents
Transformer winding deformation analysis method and device, computer device and storage medium Download PDFInfo
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Abstract
The invention relates to a transformer winding deformation analysis method and device, a computer device and a storage medium, belonging to the technical field of transformers. Then, on the basis of the relative equivalent Rockwell coefficient and the relative equivalent leakage magnetic area of the deformed winding calculated through the equivalent variable quantity, the calculation accuracy of the relative short-circuit reactance after the deformed winding is deformed can be further improved. And finally, calculating the deformation degree of the deformed winding according to the equivalent deformation and the relative short-circuit reactance of the deformed winding, thereby accurately and visually reflecting the relation between the relative short-circuit reactance of the deformed winding and the deformation degree of the deformed winding.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a transformer winding deformation analysis method and device, a computer device and a storage medium.
Background
At present, a frequency response analysis method and a low-voltage short-circuit impedance method are generally adopted for field detection of the deformation of the power transformer winding.
The existing frequency response analysis method is easily influenced by factors such as a wiring mode, a testing instrument, transformer residual magnetism and the like, so that misjudgment is easy to occur, and the existing frequency response analysis method is often used as an auxiliary judgment basis in the practical application process. In addition, the related coefficient of the winding frequency response curve is generally adopted to judge the deformation degree of the winding in the power industry at present, however, the related coefficient of the winding frequency response curve is adopted to judge the deformation degree of the winding without specific physical significance, even if whether the winding is obviously deformed or seriously deformed is judged according to the related coefficient of the winding frequency response curve, the actual deformation degree of the winding, the percentage of the winding deformation part in the winding space, the size change of the winding deformation part and the like are not clear, so that the detection accuracy of the winding deformation is not high, and the field practicability is not strong.
The existing low-voltage short-circuit impedance method only stipulates the attention value standard of the change rate of the resistance voltage of the winding, but does not analyze the relation between the change rate of the resistance voltage of the winding and the deformation degree of the winding, once the field detection result of the deformation of the winding exceeds the attention value standard of the change rate of the resistance voltage of the winding stipulated by the field detection result, the winding is slightly deformed, obviously deformed or seriously deformed, so the problems of low detection accuracy of the deformation of the winding and low field practicability exist.
Disclosure of Invention
The invention provides a transformer winding deformation analysis method and device, a computer device and a storage medium, which are used for solving at least one problem in the background art.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a transformer winding deformation analysis method, including:
acquiring the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
calculating the equivalent deformation of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation;
calculating the relative equivalent leakage area and the relative Rockwell coefficient of the deformed winding after deformation based on the equivalent deformation;
calculating the relative short-circuit reactance of the deformed winding based on the relative equivalent magnetic leakage area, the relative Rockwell coefficient and the relative reactance height of the deformed winding after deformation;
and calculating the deformation degree of the deformed winding based on the equivalent deformation and the relative short-circuit reactance of the deformed winding after deformation.
In a second aspect, an embodiment of the present invention provides a transformer winding deformation analysis apparatus, including:
the first calculation unit is used for acquiring the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
the second calculation unit is used for calculating the equivalent deformation amount of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variation amount after deformation;
the third calculation unit is used for calculating the relative equivalent leakage magnetic area and the relative Rockwell coefficient of the deformed winding based on the equivalent deformation;
the fourth calculation unit is used for calculating the relative short-circuit reactance after the deformation of the deformation winding based on the relative equivalent magnetic leakage area, the relative Rockwell coefficient and the relative reactance height after the deformation of the deformation winding;
and the fifth calculation unit is used for calculating the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformed winding is deformed.
In a third aspect, an embodiment of the present invention provides a computer apparatus, where the computer apparatus includes a processor, and the processor is configured to implement the steps of the transformer winding deformation analysis method as described above when executing a computer program stored in a memory.
In a fourth aspect, the embodiments of the present invention provide a readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the transformer winding deformation analysis method as described above.
From the above technical contents, it can be seen that the present invention has the following beneficial effects:
the relation between the average radius of the deformed winding before deformation and the equivalent variation after deformation can be accurately and intuitively reflected through the equivalent variation. Because the relative equivalent Rockwell coefficient and the relative equivalent leakage area of the deformed winding are related to the average radius of the deformed winding, the relative equivalent Rockwell coefficient and the relative equivalent leakage area of the deformed winding can be accurately calculated by introducing the equivalent variable quantity. Furthermore, the relative short-circuit reactance after the deformation of the deformed winding is related to the relative equivalent Rockwell coefficient and the relative equivalent leakage magnetic area of the deformed winding, so the calculation accuracy of the relative short-circuit reactance after the deformation of the deformed winding can be further improved on the basis of the relative equivalent Rockwell coefficient and the relative equivalent leakage magnetic area of the deformed winding calculated through the equivalent variation. And finally, calculating the deformation degree of the deformed winding according to the equivalent deformation and the relative short-circuit reactance of the deformed winding, thereby accurately and visually reflecting the relation between the relative short-circuit reactance of the deformed winding and the deformation degree of the deformed winding. Compared with the prior art, the method has more accurate calculation of the deformation degree of the deformation winding and higher field practicability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic flow chart of a transformer winding deformation analysis method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating changes in average radius of a deformed winding before and after deformation according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a transformer according to an embodiment of the present invention;
fig. 4 is a block diagram of a transformer winding deformation analysis method and apparatus according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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.
In a first aspect, as shown in fig. 1, an embodiment of the present invention provides a transformer winding deformation analysis method, including:
s101, obtaining the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
s102, calculating the equivalent deformation of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variation after deformation;
s103, calculating the relative equivalent leakage flux area and the relative Rockwell coefficient of the deformed winding based on the equivalent deformation;
s104, calculating the relative short-circuit reactance after deformation of the deformation winding based on the relative equivalent magnetic leakage area, the relative Rockwell coefficient and the relative reactance height after deformation of the deformation winding;
and S105, calculating the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformed winding is deformed.
Specifically, since the average radius of the deformed winding after deformation is changed, and the relative equivalent leakage area and the relative rockwell coefficient of the deformed winding are both related to the average radius of the deformed winding, the relative equivalent leakage area and the relative rockwell coefficient cannot be directly calculated from the average radius of the deformed winding before deformation. In order to accurately reflect the relationship between the average radius of the deformed winding before deformation and the equivalent radius change amount after deformation, the relationship between the average radius and the equivalent radius change amount after deformation can be expressed by the following formula:
where δ represents the equivalent deformation amount after deformation of the deformed winding, R represents the average radius before deformation of the deformed winding, and Δ R represents the equivalent radius change amount after deformation of the deformed winding.
As shown in fig. 2, the equivalent radius variation after deformation of the deformed winding can be calculated by the following formula:
ΔR＝R-R' (2)，
wherein R' represents the average radius of the deformed winding after deformation.
After the equivalent deformation delta is calculated, the relative equivalent leakage area and the relative Rockwell coefficient of the deformed winding can be accurately calculated. The relative short-circuit reactance of the deformed winding is related to the relative equivalent leakage area and the relative Rockwell coefficient of the deformed winding, so that the relative short-circuit reactance of the deformed winding can be further more accurately calculated on the basis of accurately calculating the relative equivalent leakage area and the relative Rockwell coefficient of the deformed winding. And finally, the deformation degree of the deformation winding is calculated through the equivalent deformation and the relative short-circuit reactance after the deformation of the deformation winding, so that the relation between the relative short-circuit reactance after the deformation of the deformation winding and the deformation degree of the deformation winding can be visually expressed, the accuracy of detecting the deformation degree of the deformation winding is improved, and the on-site practicability is better.
Further, calculating the relative reactance height of the deformed winding specifically includes:
obtaining the reactance heights of the deformed winding and the specific winding;
and calculating the relative reactance height of the deformed winding relative to the specific winding based on the reactance heights of the deformed winding and the specific winding, wherein the voltage of the specific winding is higher than that of the deformed winding.
Specifically, the embodiment of the present invention will use a three-winding step-down power transformer commonly used in a power grid to describe the technical solution of the present invention in detail, and the structure of the three-winding step-down power transformer is shown in fig. 3. In the short-circuit state of the transformer, the medium-voltage winding and the low-voltage winding of the transformer are mostly deformed due to short-circuit impact, so that the relative deformation of the windings in the transformer has three conditions: the first case is the deformation of the medium voltage winding with respect to the high voltage winding, the second case is the deformation of the low voltage winding with respect to the high voltage winding, and the third case is the deformation of the low voltage winding with respect to the medium voltage winding. In the embodiment of the invention, in the first condition, the medium-voltage winding is a deformation winding, and the high-voltage winding is a specific winding; in the second case, the low-voltage winding is a deformation winding, and the high-voltage winding is a specific winding; in the third case, the low voltage winding is the deformation winding and the medium voltage winding is the special winding. The specific calculation procedure for the three deformation cases is as follows:
firstly, the reactance height h of the high-voltage winding is obtained1Reactance height h of medium voltage winding2And the reactance height h of the low-voltage winding3。
Then, the relative reactance height of the deformed winding relative to the specific winding is calculated by the following formula respectively:
H12＝(h1+h2)/2 (3)；
H13＝(h1+h3)/2 (4)；
H23＝(h2+h3)/2 (5)，
wherein H12The relative reactance height of the medium-voltage winding with respect to the high-voltage winding, H13Is the relative reactance height of the low-voltage winding with respect to the high-voltage winding, H23Is the relative reactance height of the low voltage winding relative to the medium voltage winding.
Further, calculating the relative equivalent leakage flux area of the deformed winding based on the equivalent deformation of the deformed winding specifically includes:
and calculating the relative equivalent leakage area of the deformed winding relative to the specific winding based on the equivalent deformation after the deformation of the deformed winding, the average radius and the radial width of the specific winding, the average radius and the radial width before the deformation of the deformed winding, the main insulation width between the specific winding and the deformed winding and the main insulation radius between the specific winding and the deformed winding.
Specifically, since the average radius of the deformed winding after deformation is changed, the main insulation width between the specific winding and the deformed winding and the main insulation radius between the specific winding and the deformed winding are also changed, so that the relative equivalent leakage area of the deformed winding with respect to the specific winding is further changed. Therefore, when calculating the relative equivalent leakage area of the deformed winding with respect to the specific winding, it is necessary to obtain not only the parameters before the deformed winding is deformed but also the parameters after the deformed winding is deformed, and then calculate the relative equivalent leakage area after the deformed winding is deformed by the following formula:
wherein, Sigma D12Is the relative equivalent leakage area, Σ D, of the medium voltage winding with respect to the high voltage winding13Is the relative equivalent leakage area, Σ D, of the low-voltage winding relative to the high-voltage winding23Is the relative equivalent leakage area, R, of the low voltage winding relative to the medium voltage winding1、R2And R3Average radius before deformation of the high, medium and low voltage windings, a1、a2And a3Radial width, delta, of the high, medium and low voltage windings, respectively2And delta3Equivalent deformation amounts, R, after deformation of the medium-voltage and low-voltage windings, respectively12Is the main insulation radius, R, between the medium-voltage winding and the high-voltage winding13Is the main insulation radius, R, between the low-voltage winding and the high-voltage winding23Is the main insulation radius between the low-voltage winding and the medium-voltage winding, a12Is the main insulation width between the medium voltage winding and the high voltage winding, a13Is the main insulation width between the low-voltage winding and the high-voltage winding, a23The main insulation width between the low voltage winding and the medium voltage winding.
Further, calculating the relative rockwell coefficient of the deformed winding based on the equivalent deformation after the deformed winding is deformed specifically includes:
and calculating the relative Rockwell coefficient of the deformed winding relative to the specific winding based on the equivalent deformation after the deformed winding is deformed, the radial width of the specific winding, the average radius and the radial width before the deformed winding is deformed and the main insulation width between the specific winding and the deformed winding.
Specifically, since the average radius of the deformed winding after deformation is changed, the main insulation width between the specific winding and the deformed winding is also changed, thereby further changing the relative equivalent rockwell coefficient of the deformed winding with respect to the specific winding. Therefore, not only the parameters before deformation of the deformed winding but also the parameters after deformation of the deformed winding need to be obtained, and then the relative Rockwell coefficient after deformation of the deformed winding is calculated by the following formula:
where ρ is12Is the relative Rockwell coefficient, ρ, of the medium voltage winding relative to the high voltage winding13Is the relative Rockwell coefficient, ρ, of the low voltage winding relative to the high voltage winding23The relative rockwell coefficient of the low voltage winding relative to the medium voltage winding.
After the relative reactance height, the relative equivalent magnetic leakage area and the relative Rockwell coefficient of the deformed winding are calculated, the relative short-circuit impedance of the deformed winding can be calculated through the following formula:
wherein, X12For relative short-circuit impedance, X, of the medium-voltage winding with respect to the high-voltage winding13Is the relative short-circuit impedance, X, of the low-voltage winding with respect to the high-voltage winding23Is the relative short-circuit impedance of the low-voltage winding with respect to the medium-voltage winding, f is the operating frequency of the transformer, W1And W2The number of winding turns for the high voltage winding and the medium voltage winding, respectively.
Further, calculating the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformed winding is deformed specifically includes:
calculating a first deformation degree of the deformed winding based on the equivalent deformation after the deformed winding is deformed and the maximum equivalent deformation of the deformed winding;
calculating the change rate of the relative short-circuit reactance of the deformed winding relative to the specific winding before and after deformation based on the relative short-circuit reactance of the deformed winding relative to the specific winding before and after deformation;
and obtaining a second deformation degree of the deformed winding based on the relative short-circuit reactance of the deformed winding relative to the specific winding, the first deformation degree and the change rate of the relative short-circuit reactance, and taking the second deformation degree as the deformation degree of the deformed winding.
Specifically, the embodiments of the present invention will be described in detail below with reference to the deformation of the medium voltage winding relative to the high voltage winding, i.e., the medium voltage winding is a deformed winding and the high voltage winding is a specific winding. The deformation condition of the low-voltage winding relative to the high-voltage winding and the deformation condition of the low-voltage winding relative to the medium-voltage winding can be combined with the formula of the corresponding deformation condition to carry out equivalent deformation on the following formula, and the embodiment of the invention is not repeated.
First, the relative short-circuit impedance X of the medium-voltage winding with respect to the high-voltage winding is calculated as described above12Equation (12) of (a) can be transformed into:
wherein, C1、C2、C3And C4For the reduced constant of the formula, the relative short-circuit impedance X of the medium-voltage winding relative to the high-voltage winding can be reflected visually by the formula12Equivalent deformation delta with medium voltage winding2The relationship (2) of (c).
Secondly, a first degree of deformation of the medium voltage winding is calculated by the following formula:
wherein x is2For a first degree of deformation of the medium voltage winding, δ2,maxIs the maximum equivalent deformation of the medium voltage winding. The physical meaning of formula (16) is: when delta2In the interval
When taking a middle value, x2Accordingly in the interval [0,1 ]]Taking the value in the step (1). When x is2When the value is 0, the medium voltage winding is not deformed; when x is2When 1, the medium voltage winding is completely deformed. By a first degree of deformation x2The deformation degree of the medium voltage winding can be intuitively reflected.
Then, formula (16) is substituted into formula (15) to obtain the following formula:
wherein, C5、C6、C7And C8Is a constant after formula simplification. When x is2When equal to 0, X12＝C8，C8Representing the relative short-circuit reactance of the medium voltage winding before deformation with respect to the high voltage winding.
Then, the relative short-circuit reactance change rate delta X relative to the high-voltage winding before and after the medium-voltage winding is deformed is calculated through the following formula12：
Finally, the formula (17) is substituted into the formula (18), and the relative short-circuit reactance X relative to the specific winding after the medium-voltage winding is deformed is determined according to the relative short-circuit reactance X of the medium-voltage winding12First degree of deformation x2And relative short-circuit reactance change rate DeltaX12A second degree of deformation can be obtained:
x'2＝C9ΔX12(19)，
wherein, C9Is a constant after formula simplification. The relation between the deformation degree of the medium voltage winding and the relative short-circuit resistance of the medium voltage winding with respect to the high voltage winding can be intuitively reflected by the equation (19). In addition, x is2＝x'2The only difference is that equation (16) represents a first degree of deformation x of the medium voltage winding2Equivalent deformation delta after deformation of medium voltage winding2And maximum equivalent deformation δ of the medium voltage winding2,maxThe relationship of (1); and the expression (19) represents the second degree of deformation x 'of the medium voltage winding'2Relative short-circuit impedance X with the medium-voltage winding relative to the high-voltage winding12The relationship (2) of (c).
Further, the maximum equivalent deformation amount of the deformed winding is calculated based on the main insulation width between the specific winding and the deformed winding and the total thickness of the paper tube between the specific winding and the deformed winding.
In particular, power transformers typically employ an oil-paper tube insulation structure, the paper tube separating the oil into several oil gaps. Therefore, half of the total oil gap distance between the high-voltage winding and the medium-voltage winding is the maximum equivalent radius variation of the medium-voltage winding, that is, half of the main insulation width between the high-voltage winding and the medium-voltage winding and half of the total paper tube thickness difference between the high-voltage winding and the medium-voltage winding, namely:
wherein, Δ R2,maxAnd delta d is the main insulation width between the high-voltage winding and the middle-voltage winding and the total paper tube thickness difference between the high-voltage winding and the middle-voltage winding.
The maximum equivalent deformation delta of the medium voltage winding can be obtained by substituting the formula (20) into the formula (1)2,max：
In a second aspect, as shown in fig. 4, an embodiment of the present invention provides a transformer winding deformation analysis apparatus, including:
the first calculating unit 100 is used for acquiring the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
a second calculating unit 200, configured to calculate an equivalent deformation amount of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variation amount after deformation;
a third calculating unit 300, configured to calculate a relative equivalent leakage area and a relative rockwell coefficient after the deformation of the deformed winding based on the equivalent deformation amount;
a fourth calculating unit 400, configured to calculate a relative short-circuit reactance after deformation of the deformed winding based on the relative equivalent leakage area, the relative rockwell coefficient, and the relative reactance height after deformation of the deformed winding;
and a fifth calculating unit 500 for calculating the deformation degree of the deformed winding based on the equivalent deformation amount after the deformation of the deformed winding and the relative short-circuit reactance.
Further, calculating the relative reactance height of the deformed winding specifically includes:
obtaining the reactance heights of the deformed winding and the specific winding;
and calculating the relative reactance height of the deformed winding relative to the specific winding based on the reactance heights of the deformed winding and the specific winding, wherein the voltage of the specific winding is higher than that of the deformed winding.
Further, calculating the relative equivalent leakage flux area of the deformed winding based on the equivalent deformation of the deformed winding specifically includes:
and calculating the relative equivalent leakage area of the deformed winding relative to the specific winding based on the equivalent deformation after the deformation of the deformed winding, the average radius and the radial width of the specific winding, the average radius and the radial width before the deformation of the deformed winding, the main insulation width between the specific winding and the deformed winding and the main insulation radius between the specific winding and the deformed winding.
Further, calculating the relative rockwell coefficient of the deformed winding based on the equivalent deformation after the deformed winding is deformed specifically includes:
and calculating the relative Rockwell coefficient of the deformed winding relative to the specific winding based on the equivalent deformation after the deformed winding is deformed, the radial width of the specific winding, the average radius and the radial width before the deformed winding is deformed and the main insulation width between the specific winding and the deformed winding.
Further, calculating the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformed winding is deformed specifically includes:
calculating a first deformation degree of the deformed winding based on the equivalent deformation after the deformed winding is deformed and the maximum equivalent deformation of the deformed winding;
calculating the change rate of the relative short-circuit reactance of the deformed winding relative to the specific winding before and after deformation based on the relative short-circuit reactance of the deformed winding relative to the specific winding before and after deformation;
and obtaining a second deformation degree of the deformed winding based on the relative short-circuit reactance of the deformed winding relative to the specific winding, the first deformation degree and the change rate of the relative short-circuit reactance, and taking the second deformation degree as the deformation degree of the deformed winding.
Further, the maximum equivalent deformation amount of the deformed winding is calculated based on the main insulation width between the specific winding and the deformed winding and the total thickness of the paper tube between the specific winding and the deformed winding.
The transformer winding deformation analysis device can be used for executing the technical scheme of the method embodiment shown in fig. 1 to 3, and the implementation principle and the technical effect are similar, and are not described again here.
In a third aspect, an embodiment of the present invention provides a computer apparatus, which includes a processor, and the processor is configured to implement the steps of the method shown in fig. 1 to 3 when executing the computer program stored in the memory.
In a fourth aspect, the present invention provides a readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method shown in fig. 1 to 3.
It should be noted that, in this document, 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 phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Those skilled in the art will appreciate that although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments.
Those skilled in the art will appreciate that the description of each embodiment has a respective emphasis, and reference may be made to the related description of other embodiments for those parts of an embodiment that are not described in detail.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A transformer winding deformation analysis method is characterized by comprising the following steps:
acquiring the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
calculating the equivalent deformation of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variation after deformation;
calculating the relative equivalent leakage magnetic area and the relative Rockwell coefficient of the deformed winding based on the equivalent deformation;
calculating the relative short-circuit reactance of the deformed winding based on the relative equivalent magnetic leakage area, the relative Rockwell coefficient and the relative reactance height of the deformed winding after deformation;
and calculating the deformation degree of the deformed winding based on the equivalent deformation and the relative short-circuit reactance of the deformed winding after deformation.
2. The method of claim 1, wherein the calculating the relative reactance height of the deformed winding specifically comprises:
obtaining the reactance heights of the deformed winding and the specific winding;
calculating the relative reactance height of the deformed winding relative to the specific winding based on the reactance heights of the deformed winding and the specific winding, wherein the voltage of the specific winding is higher than that of the deformed winding.
3. The method according to claim 2, wherein the calculating the relative equivalent leakage flux area after the deformation of the deformed winding based on the equivalent deformation amount after the deformation of the deformed winding specifically includes:
and calculating the relative equivalent leakage area of the deformed winding relative to the specific winding based on the equivalent deformation after deformation of the deformed winding, the average radius and the radial width of the specific winding, the average radius and the radial width before deformation of the deformed winding, the main insulation width between the specific winding and the deformed winding and the main insulation radius between the specific winding and the deformed winding.
4. The method according to claim 2, wherein the calculating the relative rockwell coefficients of the deformed winding after deformation based on the equivalent deformation amount of the deformed winding after deformation specifically comprises:
and calculating the relative Rockwell coefficient of the deformed winding relative to the specific winding based on the equivalent deformation after the deformation of the deformed winding, the radial width of the specific winding, the average radius and the radial width before the deformation of the deformed winding and the main insulation width between the specific winding and the deformed winding.
5. The method according to claim 2, wherein the calculating of the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformation of the deformed winding specifically comprises:
calculating a first deformation degree of the deformed winding based on the equivalent deformation after the deformed winding is deformed and the maximum equivalent deformation of the deformed winding;
calculating a relative short-circuit reactance change rate of the deformed winding relative to the specific winding before and after deformation based on relative short-circuit reactance of the deformed winding relative to the specific winding before and after deformation;
and obtaining a second deformation degree of the deformed winding based on the relative short-circuit reactance, the first deformation degree and the relative short-circuit reactance change rate of the deformed winding relative to the specific winding after deformation, and taking the second deformation degree as the deformation degree of the deformed winding.
6. The method of claim 5, wherein the maximum equivalent deformation of the deformed winding is calculated based on a main insulation width between the specific winding and the deformed winding and a total cylinder thickness between the specific winding and the deformed winding.
7. A transformer winding deformation analysis device, comprising:
the first calculation unit is used for acquiring the average radius of the deformed winding before deformation and the equivalent radius variable quantity after deformation, and calculating the relative reactance height of the deformed winding;
the second calculation unit is used for calculating the equivalent deformation amount of the deformed winding based on the average radius of the deformed winding before deformation and the equivalent radius variation amount after deformation;
the third calculation unit is used for calculating the relative equivalent leakage magnetic area and the relative Rockwell coefficient of the deformed winding based on the equivalent deformation;
the fourth calculation unit is used for calculating the relative short-circuit reactance of the deformed winding based on the relative equivalent magnetic leakage area, the relative Rockwell coefficient and the relative reactance height of the deformed winding after deformation;
and the fifth calculation unit is used for calculating the deformation degree of the deformed winding based on the equivalent deformation amount and the relative short-circuit reactance after the deformed winding is deformed.
8. The apparatus of claim 7, wherein the calculating the relative reactance height of the deformed winding specifically comprises:
obtaining the reactance heights of the deformed winding and the specific winding;
calculating the relative reactance height of the deformed winding relative to the specific winding based on the reactance heights of the deformed winding and the specific winding, wherein the voltage of the specific winding is higher than that of the deformed winding.
9. A computer arrangement, characterized in that the computer arrangement comprises a processor for implementing the steps of the method according to any one of claims 1-6 when executing a computer program stored in a memory.
10. A readable storage medium having stored thereon a computer program, characterized in that: the computer program realizing the steps of the method according to any one of claims 1-6 when executed by a processor.
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| CN102997838A (en) * | 2012-11-20 | 2013-03-27 | 中国电力科学研究院 | Transformer winding deformation fault diagnosis method based on frequency sweep short circuit characteristics |
| CN103217579A (en) * | 2012-12-28 | 2013-07-24 | 富阳市供电局 | On-line monitoring system of transformer winding |
| CN103438797A (en) * | 2013-07-31 | 2013-12-11 | 广东电网公司汕头供电局 | Method and system for on-line detection of transformer winding deformation |
| US20170356733A1 (en) * | 2016-09-02 | 2017-12-14 | Amirkabir University of Technology | Detection of radial deformations of transformers |
| CN107966632A (en) * | 2017-11-06 | 2018-04-27 | 国网湖北省电力公司宜昌供电公司 | A kind of appraisal procedure of the radial anti-short circuit capability of winding in fortune power transformer |
| CN110081809A (en) * | 2019-05-17 | 2019-08-02 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | A kind of method of determining transformer winding width to deformation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102997838A (en) * | 2012-11-20 | 2013-03-27 | 中国电力科学研究院 | Transformer winding deformation fault diagnosis method based on frequency sweep short circuit characteristics |
| CN103217579A (en) * | 2012-12-28 | 2013-07-24 | 富阳市供电局 | On-line monitoring system of transformer winding |
| CN103438797A (en) * | 2013-07-31 | 2013-12-11 | 广东电网公司汕头供电局 | Method and system for on-line detection of transformer winding deformation |
| US20170356733A1 (en) * | 2016-09-02 | 2017-12-14 | Amirkabir University of Technology | Detection of radial deformations of transformers |
| CN107966632A (en) * | 2017-11-06 | 2018-04-27 | 国网湖北省电力公司宜昌供电公司 | A kind of appraisal procedure of the radial anti-short circuit capability of winding in fortune power transformer |
| CN110081809A (en) * | 2019-05-17 | 2019-08-02 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | A kind of method of determining transformer winding width to deformation |
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