Air-core reactor and its method, device and computer equipment for locating inter-turn breakdown

Abstract

The present invention discloses a hollow reactor and its method, device and computer equipment for locating inter-turn breakdown. The method includes: after inter-turn breakdown occurs in the hollow reactor, obtaining the output voltage of the magnetic field sensor and the radial component of the axial magnetic field of the hollow reactor; constructing a cylindrical coordinate system based on the magnetic field sensor, and establishing the incident angle of the radial component with respect to the magnetic field sensor and the azimuth angle of the breakdown area of the inter-turn breakdown with respect to the magnetic field sensor; obtaining the angular relationship between the incident angle and the azimuth angle, and constructing a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the hollow reactor; calculating the azimuth angle of the inter-turn breakdown in the cylindrical coordinate system, and confirming the breakdown area of the inter-turn breakdown according to the azimuth angle. The present invention realizes inter-turn breakdown detection under the conditions of low cost and without changing the insulation state of the hollow reactor based on the magnetic field change at the axis center of the hollow reactor, and ensures the detection accuracy of the inter-turn breakdown.

Description

Technical Field

[0001] The present invention relates to the technical field of reactors, and particularly to an air-core reactor and a method, device, and computer equipment for locating inter-turn breakdown thereof. Background Art

[0002] An air-core reactor is formed by winding a wire around a hollow insulating cylinder and is widely used in power systems. During the long-term operation of the air-core reactor, it is easily affected by factors such as electric fields, vibrations, temperature, and humidity changes, resulting in the gradual aging and breakdown of the inter-turn insulation, forming a large reverse induced current and short-circuit current, and further leading to accidents such as the reactor catching fire and short-circuiting. Therefore, the detection and location of inter-turn breakdown of the air-core reactor are problems that need to be solved by those skilled in the art.

[0003] Currently, the main detection schemes for inter-turn breakdown of reactors include acoustic detection method, vibration measurement method, and coil measurement method, etc. Among them, the acoustic detection method measures the noise generated by the reactor. When inter-turn breakdown occurs, due to the change in the magnetic field distribution, the noise generated by the reactor also changes accordingly, and this is used as a judgment basis; the vibration method measures the vibrations occurring at different positions of the reactor through a laser vibrometer. When inter-turn breakdown occurs, due to the change in the magnetic force, the vibration distribution of the reactor also changes, and this is used as a judgment basis; the coil method installs an induction coil on the upper and lower sides of the reactor respectively and connects them in a differential connection. Due to the symmetry of the reactor, the coil output is 0 under normal circumstances, while when inter-turn breakdown occurs, the internal magnetic field of the reactor is no longer symmetric, and the differential signal becomes larger, and then this is used as a judgment basis.

[0004] However, each of the above schemes has certain defects. For example, the acoustic detection method is easily interfered by the external environment, resulting in inaccurate detection results; the vibration measurement method has a high cost and is easily affected by the weather; the coil measurement method also has a high cost, complex construction, and will affect the external insulation of the reactor. Summary of the Invention

[0005] Embodiments of the present invention provide an air-core reactor and a method, device, and computer equipment for locating inter-turn breakdown thereof, aiming to achieve inter-turn breakdown detection at low cost and ensure the detection accuracy of inter-turn breakdown.

[0006] In a first aspect, embodiments of the present invention provide an air-core reactor, including:

[0007] A reactor body;

[0008] A magnetic field sensor disposed at the middle position of the reactor body;

[0009] Among them, the output voltage of the magnetic field sensor is 0 in the normal state and non-zero in the inter-turn breakdown state; the reactor has an axial magnetic field in the normal state and a radial component in the axial magnetic field in the inter-turn breakdown state.

[0010] In a second aspect, an embodiment of the present invention provides an inter-turn breakdown positioning method, which uses the air-core reactor as described in the first aspect, including:

[0011] After the inter-turn breakdown of the air-core reactor occurs, obtain the output voltage of the magnetic field sensor and the radial component of the axial magnetic field of the air-core reactor;

[0012] Construct a cylindrical coordinate system according to the magnetic field sensor, and establish the incident angle of the radial component with respect to the magnetic field sensor and the azimuth angle of the breakdown area of the inter-turn breakdown with respect to the magnetic field sensor in the cylindrical coordinate system;

[0013] Based on the electromagnetic field theory, obtain the angular relationship between the incident angle and the azimuth angle, and construct a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor;

[0014] Based on the complex operation formula and the angular relationship, calculate the azimuth angle of the inter-turn breakdown in the cylindrical coordinate system, and confirm the breakdown area of the inter-turn breakdown according to the azimuth angle.

[0015] In a third aspect, an embodiment of the present invention provides an inter-turn breakdown positioning device, including:

[0016] A voltage acquisition unit, configured to obtain the output voltage of the magnetic field sensor and the radial component of the axial magnetic field of the air-core reactor after the inter-turn breakdown of the air-core reactor occurs;

[0017] A coordinate system construction unit, configured to construct a cylindrical coordinate system according to the magnetic field sensor, and establish the incident angle of the radial component with respect to the magnetic field sensor and the azimuth angle of the breakdown area of the inter-turn breakdown with respect to the magnetic field sensor in the cylindrical coordinate system;

[0018] A complex construction unit, configured to obtain the angular relationship between the incident angle and the azimuth angle based on the electromagnetic field theory, and construct a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor;

[0019] A region confirmation unit, configured to calculate the azimuth angle of the inter-turn breakdown in the cylindrical coordinate system based on the complex operation formula and the angular relationship, and confirm the breakdown area of the inter-turn breakdown according to the azimuth angle.

[0020] Fourthly, an embodiment of the present invention provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the inter-turn breakdown location method described in the second aspect is implemented.

[0021] An embodiment of the present invention provides a hollow reactor, an inter-turn breakdown location method, a device, and a computer device thereof. The method includes: after an inter-turn breakdown occurs in the hollow reactor, obtaining the output voltage of the magnetic field sensor and the radial component of the axial magnetic field of the hollow reactor; constructing a cylindrical coordinate system according to the magnetic field sensor, and establishing the incident angle of the radial component with respect to the magnetic field sensor and the azimuth angle of the breakdown area of the inter-turn breakdown with respect to the magnetic field sensor in the cylindrical coordinate system; based on the electromagnetic field theory, obtaining the angular relationship between the incident angle and the azimuth angle, and constructing a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the hollow reactor; calculating the azimuth angle of the inter-turn breakdown in the cylindrical coordinate system based on the complex operation formula and the angular relationship, and confirming the breakdown area of the inter-turn breakdown according to the azimuth angle. In the embodiment of the present invention, by arranging a magnetic field sensor in the middle of the hollow reactor and then based on the magnetic field change at the axis center of the hollow reactor, the detection and location of the inter-turn breakdown are realized. In this way, the inter-turn breakdown detection can be completed under the conditions of low cost and without changing the insulation state of the hollow reactor, and the detection accuracy of the inter-turn breakdown is ensured. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of the distribution of magnetic field sensors in a hollow reactor provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic flowchart of an inter-turn breakdown location method provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic block diagram of an inter-turn breakdown location device provided by an embodiment of the present invention. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0028] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0029] It should be further understood that the term "and / or" used in this specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0030] Next, please refer to Figure 1 , an embodiment of the present invention provides a hollow reactor, including:

[0031] A reactor body;

[0032] A magnetic field sensor disposed at an intermediate position of the reactor body;

[0033] Wherein, the output voltage of the magnetic field sensor is 0 in the normal state and non-zero in the turn-to-turn breakdown state; the reactor has an axial magnetic field in the normal state, and the axial magnetic field has a radial component in the turn-to-turn breakdown state.

[0034] Furthermore, the magnetic field sensor includes a first sub-magnetic field sensor and a second sub-magnetic field sensor, and the magnetic field directions of the first sub-magnetic field sensor and the second sub-magnetic field sensor and the magnetic field normal direction form a cylindrical coordinate system.

[0035] In this embodiment, a magnetic field sensor is installed inside the hollow reactor, that is, in the hollow region. The magnetic field sensor has no output voltage in the state of no turn-to-turn breakdown (i.e., the normal state), while when turn-to-turn breakdown occurs, an output voltage will be generated. For a hollow reactor, there is an axial magnetic field in the state of no turn-to-turn breakdown, and when turn-to-turn breakdown occurs, a radial component will be generated in this axial magnetic field. In this embodiment, the breakdown position of turn-to-turn breakdown can be located by the output voltage of the magnetic field sensor and the radial component of the hollow reactor.

[0036] Under power frequency conditions, the wavelength of electromagnetic waves is much larger than the distance between the magnetic field sensors. Therefore, the phase difference of the magnetic field at the positions of the sensors can be ignored. So, under normal circumstances, there is only an axial magnetic field on the axis, and the output voltage of each magnetic field sensor is 0. When turn-to-turn breakdown occurs, the axial magnetic field contains a radial component, and the normal magnetic field components passing through the measurement planes of the magnetic field sensors are not equal. Therefore, a coordinate system, that is, the cylindrical coordinate system, can be formed according to the magnetic field normal and the magnetic field direction of the first sub-magnetic field sensor and the second sub-magnetic field sensor, and the breakdown position coordinates of turn-to-turn breakdown are Figure 1 in where r is the radius of the hollow reactor, is the azimuth angle of the breakdown position relative to the magnetic field sensor, and z is the height of the breakdown position. This embodiment mainly focuses on the azimuth angle for description, and for details, see the method embodiment part below.

[0037] Figure 2 FIG. is a schematic flow chart of a method for locating turn-to-turn breakdown provided by an embodiment of the present invention. This method uses the above-mentioned hollow reactor, and the method specifically includes: steps S101 to S104.

[0038] S101. After turn-to-turn breakdown occurs in the hollow reactor, obtain the output voltage of the magnetic field sensor and the radial component of the axial magnetic field of the hollow reactor;

[0039] S102. Construct a cylindrical coordinate system according to the magnetic field sensor, and establish the incident angle of the radial component relative to the magnetic field sensor and the azimuth angle of the breakdown area of turn-to-turn breakdown relative to the magnetic field sensor in the cylindrical coordinate system;

[0040] S103. Based on the electromagnetic field theory, obtain the angular relationship between the incident angle and the azimuth angle, and construct a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the hollow reactor;

[0041] S104. Calculate the azimuth angle of turn-to-turn breakdown in the cylindrical coordinate system based on the complex operation formula and the angular relationship, and confirm the breakdown area of turn-to-turn breakdown according to the azimuth angle.

[0042] In this embodiment, when an inter-turn breakdown occurs in the air-core reactor, the output voltage of the magnetic field sensor installed in the air-core reactor and the radial component of the magnetic field along the axis of the air-core reactor itself are obtained. Then, a cylindrical coordinate system is established based on the magnetic field sensor, and in the cylindrical coordinate system, the incident angle of the radial component relative to the magnetic field sensor and the azimuth angle of the breakdown region relative to the magnetic field sensor are determined. Then, according to the electromagnetic field theory, the angular relationship between the incident angle and the azimuth angle is confirmed, and a complex operation formula is constructed by combining the output voltage and the radial component. Through this complex operation formula, the angular region or angle of the azimuth angle can be calculated, so as to detect and locate the breakdown position of the inter-turn breakdown.

[0043] In this embodiment, by arranging a magnetic field sensor in the middle of the air-core reactor and then based on the magnetic field change at the center of the axis of the air-core reactor, the detection and positioning of the inter-turn breakdown are realized. In this way, it is possible to complete the inter-turn breakdown detection under the conditions of low cost and without changing the insulation state of the air-core reactor, and ensure the detection accuracy of the inter-turn breakdown.

[0044] In one embodiment, the step of constructing a cylindrical coordinate system according to the magnetic field sensor and establishing the incident angle of the radial component relative to the magnetic field sensor and the azimuth angle of the breakdown region of the inter-turn breakdown relative to the magnetic field sensor in the cylindrical coordinate system includes:

[0045] Set the angle between the magnetic field normal of the first sub-magnetic field sensor and the magnetic field normal of the second sub-magnetic field sensor to 90°.

[0046] Taking the intersection point between the magnetic field normal of the first sub-magnetic field sensor and the magnetic field normal of the second sub-magnetic field sensor as the center of the circle, and combining the magnetic field normal direction of the first sub-magnetic field sensor, the magnetic field normal direction of the second sub-magnetic field sensor, and the magnetic field direction of the magnetic field sensor to establish the cylindrical coordinate system.

[0047] In this embodiment, when establishing the cylindrical coordinate system, taking the intersection point of the magnetic field directions of the two sub-magnetic field sensors as the center of the circle, and at the same time establishing the cylindrical coordinate system with the magnetic field direction and the normal direction. In this cylindrical coordinate system, the radial component of the magnetic field along the axis of the air-core reactor will pass through the magnetic field sensor and form an angle, that is, the incident angle. Similarly, there will also be an angle between the breakdown position of the inter-turn breakdown and the magnetic field sensor, that is, the azimuth angle. For example, taking the magnetic field normal direction of the first sub-magnetic field sensor as the x-axis, the magnetic field normal direction of the second sub-magnetic field sensor as the y-axis, the magnetic field directions of the two sub-magnetic field sensors as the z-axis, and at the same time taking the intersection point of the magnetic field normals of the two sub-magnetic field sensors as the center of the circle, the cylindrical coordinate system in the air-core reactor is established.

[0048] In one embodiment, the angular relationship between the incident angle and the azimuth angle is:

[0049]

[0050]

[0051] where θ 1 is the first incident angle of the radial component with respect to the first sub-magnetic field sensor, and θ 2 is the second incident angle of the radial component with respect to the second sub-magnetic field sensor, is the azimuth angle;

[0052] Based on the electromagnetic field theory, obtaining the angular relationship between the incident angle and the azimuth angle, and constructing a complex operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor, including:

[0053] Based on the cylindrical coordinate system, obtaining the comparison relationship between the output voltage of the magnetic field sensor and the radial component; wherein, the comparison relationship is: V represents the output voltage, and i represents the i-th sub-magnetic field sensor;

[0054] According to the following formula, constructing the complex operation formula by combining the angular relationship and the comparison relationship:

[0055]

[0056] where E represents the output voltage difference between the first sub-magnetic field sensor and the second sub-magnetic field sensor, V 1 represents the first output voltage of the first sub-magnetic field sensor, V 2 represents the second output voltage of the second sub-magnetic field sensor, and j represents the imaginary unit.

[0057] In this embodiment, on the one hand, the angular relationship between the incident angle and the azimuth angle is confirmed, and on the other hand, the comparison relationship (i.e., the proportional relationship) between the output voltage of the magnetic field sensor and the incident angle is confirmed. Then, by combining the angular relationship and the comparison relationship, the complex operation formula can be constructed. Specifically, the angular relationship between the incident angle and the azimuth angle is as shown in the foregoing formula. It can be understood that since the magnetic field normal direction of the first sub-magnetic field sensor is taken as the x-axis here, the above angular relationship exists. If the magnetic field normal direction of the second sub-magnetic field sensor is taken as the x-axis, then the above angular relationship is correspondingly adjusted to: Then, when constructing the complex operation formula, first construct: E = V 2 - V 1 , and therefore,

[0058] In one embodiment, calculating the azimuth angle of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex operation formula, and confirming the breakdown area of the turn-to-turn breakdown according to the azimuth angle, includes:

[0059] Obtaining the voltage-angle relationship between the azimuth angle and the output voltage difference according to the complex operation formula; wherein, the voltage-angle relationship is:

[0060] According to the voltage-angle relationship, obtaining the angle area of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage, and outputting the angle area as the breakdown area.

[0061] In this embodiment, the relationship between the azimuth angle and the output voltage of the magnetic field sensor can be finally obtained through the constructed complex operation formula, that is Therefore, the magnitude of the azimuth angle can be determined according to the first output voltage of the first sub-magnetic field sensor and the second output voltage of the second sub-magnetic field sensor.

[0062] Specifically, the obtaining the angle area of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage according to the voltage-angle relationship, and outputting the angle area as the breakdown area includes:

[0063] If the first output voltage is less than 0 and the second output voltage is greater than 0, then confirm that the angle area of the azimuth angle is

[0064] If the first output voltage is less than 0 and the second output voltage is less than 0, then confirm that the angle area of the azimuth angle is

[0065] If the first output voltage is greater than 0 and the second output voltage is less than 0, then confirm that the angle area of the azimuth angle is

[0066] If the first output voltage is greater than 0 and the second output voltage is greater than 0, then confirm that the angle area of the azimuth angle is

[0067] In this embodiment, when the first output voltage V 1 <0 and the second output voltage V 2 >0, it indicates that E = V 2 -V 1 >0, so When the first output voltage V 1 <0 and the second output voltage V 2 <0, When the first output voltage V 1 > 0 and the second output voltage V 2 < 0, the following can be obtained When the first output voltage V 1 > 0 and the second output voltage V 2 > 0, the following can be obtained

[0068] It should be noted that the angular region described in this embodiment is based on the plane coordinate system constructed by the x-axis and y-axis in the cylindrical coordinate system. For example It means that the angular region is in the first quadrant of the plane coordinate system It means that the angular region is in the second quadrant of the plane coordinate system It means that the angular region is in the third quadrant of the plane coordinate system It means that the angular region is in the fourth quadrant of the plane coordinate system

[0069] In addition, according to the relationship between the voltage and the angle, obtaining the angular region of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage, and outputting the angular region as the breakdown region further includes:

[0070] When the first output voltage is equal to 0, if the second output voltage is greater than 0, it is confirmed that the angular region of the azimuth angle is 0°; if the second output voltage is less than 0, it is confirmed that the angular region of the azimuth angle is 180°

[0071] When the second output voltage is equal to 0, if the first output voltage is greater than 0, it is confirmed that the angular region of the azimuth angle is 270°; if the first output voltage is less than 0, it is confirmed that the angular region of the azimuth angle is 90°

[0072] In this embodiment, for some special scenarios, for example, when the first output voltage V 1 = 0, if the second output voltage V 2 > 0, it is determined that is 0°, that is, on the positive x-axis of the plane coordinate system, and if the second output voltage V 2 < 0, it is determined that is 180°, that is, on the negative x-axis of the plane coordinate system. Another example is when the second output voltage V 2 = 0, if the first output voltage V 1 > 0, it is determined that is 270°, that is, on the negative y-axis of the plane coordinate system, and if the first output voltage V 1 < 0, it is determined that is 90°, that is, on the positive y-axis in the plane coordinate system.

[0073] Also, if the first output voltage and the second output voltage are V 1 = V 2 > 0, then it is determined that is 315°; if the first output voltage and the second output voltage are V 1 = V 2 < 0, then it is determined that is 135°; if the first output voltage and the second output voltage are V 1 = -V 2 > 0, then it is determined that is 225°; if the first output voltage and the second output voltage are V 1 = -V 2 < 0, then it is determined that is 45°.

[0074] Through the above method, the angle range of the azimuth angle can be obtained in this embodiment, so as to determine the breakdown position when the turn-to-turn breakdown occurs. It can be understood that the turn-to-turn breakdown positioning azimuth provided by this embodiment can quickly and simply locate the plane position of the breakdown position, and the staff can immediately accurately locate the breakdown position according to this plane position, and then take corresponding measures.

[0075] Figure 3 FIG. 34 is a schematic block diagram of a turn-to-turn breakdown positioning device 200 provided by an embodiment of the present invention. The device 200 includes:

[0076] A voltage acquisition unit 201, configured to acquire the output voltage of the magnetic field sensor and the radial component of the magnetic field on the axis of the air-core reactor after a turn-to-turn breakdown occurs in the air-core reactor;

[0077] A coordinate system construction unit 202, configured to construct a cylindrical coordinate system according to the magnetic field sensor, and establish an incident angle of the radial component with respect to the magnetic field sensor and an azimuth angle of the breakdown region of the turn-to-turn breakdown with respect to the magnetic field sensor in the cylindrical coordinate system;

[0078] A complex number construction unit 203, configured to obtain the angular relationship between the incident angle and the azimuth angle based on the electromagnetic field theory, and construct a complex number operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor;

[0079] A region confirmation unit 204, configured to calculate the azimuth angle of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex number operation formula and the angular relationship, and confirm the breakdown region of the turn-to-turn breakdown according to the azimuth angle.

[0080] In one embodiment, the coordinate system construction unit 202 includes:

[0081] An angle setting unit, configured to set the angle between the magnetic field normal of the first sub-magnetic field sensor and the magnetic field normal of the second sub-magnetic field sensor to 90°;

[0082] A direction combining unit, configured to use the intersection point between the magnetic field normal of the first sub-magnetic field sensor and the magnetic field normal of the second sub-magnetic field sensor as the center of a circle, and combine the magnetic field normal direction of the first sub-magnetic field sensor, the magnetic field normal direction of the second sub-magnetic field sensor, and the magnetic field direction of the magnetic field sensor to establish the cylindrical coordinate system.

[0083] In one embodiment, the angular relationship between the incident angle and the azimuth angle is:

[0084]

[0085]

[0086] where θ 1 is the first incident angle of the radial component with respect to the first sub-magnetic field sensor, and θ 2 is the second incident angle of the radial component with respect to the second sub-magnetic field sensor, is the azimuth angle;

[0087] The complex number construction unit 203 includes:

[0088] A first relationship acquisition unit, configured to acquire the comparison relationship between the output voltage of the magnetic field sensor and the radial component based on the cylindrical coordinate system; where the comparison relationship is: V represents the output voltage, and i represents the i-th sub-magnetic field sensor;

[0089] A relationship combining and constructing unit, configured to construct the complex number operation formula by combining the angular relationship and the comparison relationship according to the following formula:

[0090]

[0091] where E represents the output voltage difference between the first sub-magnetic field sensor and the second sub-magnetic field sensor, V 1 represents the first output voltage of the first sub-magnetic field sensor, V 2 represents the second output voltage of the second sub-magnetic field sensor, and j represents the imaginary unit.

[0092] In one embodiment, the region confirmation unit 204 includes:

[0093] A second relationship acquisition unit, configured to acquire a voltage-angle relationship between an azimuth angle and an output voltage difference according to the complex operation formula; wherein, the voltage-angle relationship is:

[0094] A region acquisition unit, configured to obtain, according to the voltage-angle relationship, an angle region of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage, and output the angle region as the breakdown region.

[0095] In an embodiment, the region acquisition unit includes:

[0096] A first confirmation unit, configured to confirm that the angle region of the azimuth angle is

[0097] A second confirmation unit, configured to confirm that the angle region of the azimuth angle is

[0098] A third confirmation unit, configured to confirm that the angle region of the azimuth angle is

[0099] A fourth confirmation unit, configured to confirm that the angle region of the azimuth angle is

[0100] In an embodiment, the region acquisition unit further includes:

[0101] A fifth confirmation unit, configured to, when the first output voltage is equal to 0, if the second output voltage is greater than 0, confirm that the angle region of the azimuth angle is 0°; if the second output voltage is less than 0, confirm that the angle region of the azimuth angle is 180°;

[0102] A sixth confirmation unit, configured to, when the second output voltage is equal to 0, if the first output voltage is greater than 0, confirm that the angle region of the azimuth angle is 270°; if the first output voltage is less than 0, confirm that the angle region of the azimuth angle is 90°.

[0103] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, and details are not described herein.

[0104] An embodiment of the present invention further provides a computer device, which may include a memory and a processor. When the computer program stored in the memory is called by the processor, the steps provided in the above embodiments can be implemented. Of course, the computer device may further include various network interfaces, power supplies and other components.

[0105] The various embodiments in the specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the system disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part. It should be noted that for those of ordinary skill in the art in the technical field of the present application, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0106] It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

Claims

1. An air-core reactor, characterized in that: include: Reactor body; A magnetic field sensor is arranged in the middle of the reactor body; The output voltage of the magnetic field sensor is 0 in a normal state, and the output voltage is not 0 in a turn-to-turn breakdown state; the reactor has an axial magnetic field in a normal state, and the axial magnetic field has a radial component in a turn-to-turn breakdown state; The magnetic field sensor comprises a first sub-magnetic field sensor and a second sub-magnetic field sensor, wherein the magnetic field directions of the first sub-magnetic field sensor and the second sub-magnetic field sensor and the magnetic field normal direction form a cylindrical coordinate system; After the air-core reactor has inter-turn breakdown, obtaining the output voltage of the magnetic field sensor and the radial component of the magnetic field on the axis of the air-core reactor; Constructing a cylindrical coordinate system according to the magnetic field sensor, and establishing in the cylindrical coordinate system an incident angle of the radial component to the magnetic field sensor and an azimuth angle of a breakdown region of interturn breakdown relative to the magnetic field sensor; Based on electromagnetic field theory, the angular relationship between the incident angle and the azimuth angle is obtained, and a complex operation formula about the azimuth angle is constructed by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor; Calculating the azimuth of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex number operation formula and the angle relationship, and confirming the breakdown area of ​​the turn-to-turn breakdown according to the azimuth; The step of constructing a cylindrical coordinate system according to the magnetic field sensor and establishing in the cylindrical coordinate system an incident angle of the radial component to the magnetic field sensor and an azimuth angle of a breakdown region of turn-to-turn breakdown relative to the magnetic field sensor includes: Setting the angle between the magnetic field normal line of the first magnetic field sub-sensor and the magnetic field normal line of the second magnetic field sub-sensor to 90°; Taking the intersection of the magnetic field normal line of the first magnetic field sensor and the magnetic field normal line of the second magnetic field sensor as the center of the circle, and combining the direction of the magnetic field normal line of the first magnetic field sensor, the direction of the magnetic field normal line of the second magnetic field sensor, and the magnetic field direction of the magnetic field sensor, the cylindrical coordinate system is established; The angular relationship between the incident angle and the azimuth angle is: Wherein, θ1 is a first incident angle of the radial component to the first sub-magnetic field sensor, θ2 is a second incident angle of the radial component to the second sub-magnetic field sensor, is the azimuth; The method of obtaining the angular relationship between the incident angle and the azimuth angle based on electromagnetic field theory and constructing a complex number operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor includes: Based on the cylindrical coordinate system, a comparison relationship between the output voltage of the magnetic field sensor and the radial component is obtained; wherein the comparison relationship is: V represents the output voltage, i represents the i-th sub-magnetic field sensor; According to the following formula, the complex number operation formula is constructed by combining the angle relationship and the contrast relationship: Wherein, E represents the output voltage difference between the first sub-magnetic field sensor and the second sub-magnetic field sensor, V1 represents the first output voltage of the first sub-magnetic field sensor, V2 represents the second output voltage of the second sub-magnetic field sensor, and j represents an imaginary unit.

2. A turn-to-turn breakdown positioning method, using the air-core reactor as claimed in claim 1, characterized in that: include: After the air-core reactor has inter-turn breakdown, obtaining the output voltage of the magnetic field sensor and the radial component of the magnetic field on the axis of the air-core reactor; Constructing a cylindrical coordinate system according to the magnetic field sensor, and establishing in the cylindrical coordinate system an incident angle of the radial component to the magnetic field sensor and an azimuth angle of a breakdown region of interturn breakdown relative to the magnetic field sensor; Based on electromagnetic field theory, the angular relationship between the incident angle and the azimuth angle is obtained, and a complex operation formula about the azimuth angle is constructed by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor; Calculating the azimuth of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex number operation formula and the angle relationship, and confirming the breakdown area of ​​the turn-to-turn breakdown according to the azimuth; The step of constructing a cylindrical coordinate system according to the magnetic field sensor and establishing in the cylindrical coordinate system an incident angle of the radial component to the magnetic field sensor and an azimuth angle of a breakdown region of turn-to-turn breakdown relative to the magnetic field sensor includes: Setting the angle between the magnetic field normal line of the first magnetic field sub-sensor and the magnetic field normal line of the second magnetic field sub-sensor to 90°; Taking the intersection of the magnetic field normal line of the first magnetic field sensor and the magnetic field normal line of the second magnetic field sensor as the center of the circle, and combining the direction of the magnetic field normal line of the first magnetic field sensor, the direction of the magnetic field normal line of the second magnetic field sensor, and the magnetic field direction of the magnetic field sensor, the cylindrical coordinate system is established; The angular relationship between the incident angle and the azimuth angle is: Wherein, θ1 is a first incident angle of the radial component to the first sub-magnetic field sensor, θ2 is a second incident angle of the radial component to the second sub-magnetic field sensor, is the azimuth; The method of obtaining the angular relationship between the incident angle and the azimuth angle based on electromagnetic field theory and constructing a complex number operation formula about the azimuth angle by combining the output voltage of the magnetic field sensor and the radial component of the air-core reactor includes: Based on the cylindrical coordinate system, a comparison relationship between the output voltage of the magnetic field sensor and the radial component is obtained; wherein the comparison relationship is: V represents the output voltage, i represents the i-th sub-magnetic field sensor; According to the following formula, the complex number operation formula is constructed by combining the angle relationship and the contrast relationship: Wherein, E represents the output voltage difference between the first sub-magnetic field sensor and the second sub-magnetic field sensor, V1 represents the first output voltage of the first sub-magnetic field sensor, V2 represents the second output voltage of the second sub-magnetic field sensor, and j represents an imaginary unit.

3. The turn-to-turn breakdown positioning method according to claim 2, characterized in that: The step of calculating the azimuth of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex number operation formula, and confirming the breakdown area of ​​the turn-to-turn breakdown according to the azimuth, comprises: The voltage and angle relationship between the azimuth angle and the output voltage difference is obtained according to the complex operation formula; wherein the voltage and angle relationship is: According to the relationship between the voltage and the angle, the angle region of the azimuth angle in the cylindrical coordinate system is obtained through the first output voltage and the second output voltage, and the angle region is output as the breakdown region.

4. The turn-to-turn breakdown positioning method according to claim 3, characterized in that: The method of obtaining the angle region of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage according to the voltage-angle relationship, and outputting the angle region as the breakdown region, comprises: If the first output voltage is less than 0 and the second output voltage is greater than 0, it is determined that the azimuth angle range is If the first output voltage is less than 0 and the second output voltage is less than 0, it is determined that the azimuth angle range is If the first output voltage is greater than 0 and the second output voltage is less than 0, it is determined that the azimuth angle range is If the first output voltage is greater than 0 and the second output voltage is greater than 0, it is determined that the azimuth angle range is 5. The turn-to-turn breakdown positioning method according to claim 4, characterized in that: The step of obtaining the angle region of the azimuth angle in the cylindrical coordinate system through the first output voltage and the second output voltage according to the voltage-angle relationship, and outputting the angle region as the breakdown region, further includes: When the first output voltage is equal to 0, if the second output voltage is greater than 0, it is confirmed that the angle area of ​​the azimuth angle is 0°; if the second output voltage is less than 0, it is confirmed that the angle area of ​​the azimuth angle is 180°; When the second output voltage is equal to 0, if the first output voltage is greater than 0, it is confirmed that the angle range of the azimuth angle is 270°; if the first output voltage is less than 0, it is confirmed that the angle range of the azimuth angle is 90°.

6. A turn-to-turn breakdown positioning device, using the air-core reactor as claimed in claim 1, characterized in that: include: A voltage acquisition unit, used to acquire the output voltage of the magnetic field sensor and the radial component of the magnetic field on the axis of the air-core reactor after the air-core reactor has interturn breakdown; A coordinate system construction unit, configured to construct a cylindrical coordinate system according to the magnetic field sensor, and establish in the cylindrical coordinate system an incident angle of the radial component to the magnetic field sensor and an azimuth angle of a breakdown region of turn-to-turn breakdown relative to the magnetic field sensor; A complex number construction unit, for obtaining the angular relationship between the incident angle and the azimuth angle based on electromagnetic field theory, and constructing a complex number operation formula about the azimuth angle in combination with the output voltage of the magnetic field sensor and the radial component of the air-core reactor; A region confirmation unit, configured to calculate the azimuth of the turn-to-turn breakdown in the cylindrical coordinate system based on the complex number operation formula and the angle relationship, and confirm a breakdown region of the turn-to-turn breakdown according to the azimuth; The coordinate system construction unit comprises: an angle setting unit, configured to set the angle between the magnetic field normal line of the first sub-magnetic field sensor and the magnetic field normal line of the second sub-magnetic field sensor to 90°; a direction combining unit, configured to establish the cylindrical coordinate system by taking the intersection of the magnetic field normal line of the first magnetic field sub-sensor and the magnetic field normal line of the second magnetic field sub-sensor as the center of the circle and combining the direction of the magnetic field normal line of the first magnetic field sub-sensor, the direction of the magnetic field normal line of the second magnetic field sub-sensor and the magnetic field direction of the magnetic field sensor; The angular relationship between the incident angle and the azimuth angle is: Wherein, θ1 is a first incident angle of the radial component to the first sub-magnetic field sensor, θ2 is a second incident angle of the radial component to the second sub-magnetic field sensor, is the azimuth; The plurality of construction units comprises: The first relationship acquisition unit is used to acquire a comparison relationship between the output voltage of the magnetic field sensor and the radial component based on the cylindrical coordinate system; wherein the comparison relationship is: V represents the output voltage, i represents the i-th sub-magnetic field sensor; The relationship combination construction unit is used to construct the complex number operation formula by combining the angle relationship and the contrast relationship according to the following formula: Wherein, E represents the output voltage difference between the first sub-magnetic field sensor and the second sub-magnetic field sensor, V1 represents the first output voltage of the first sub-magnetic field sensor, V2 represents the second output voltage of the second sub-magnetic field sensor, and j represents an imaginary unit.

7. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the turn-to-turn breakdown locating method as claimed in any one of claims 2 to 5 when executing the computer program.

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