Zero-value insulator detection device and method

Abstract

The invention belongs to the technical field of power systems, and discloses a zero-value insulator detection device and method, and the device comprises an electroluminescent module which is used for carrying out the luminescence through employing an electroluminescent material according to the voltage change of an insulator, so as to judge whether the insulator has a zero-value fault or not according to the luminescence condition; and the voltage conduction module is used for acquiring voltages at two ends of the insulator in real time, judging the voltages of the insulator and supplying power to the electroluminescent module according to a judgment result. According to the invention, rapid zero-value detection can be carried out on the insulator, and when zero-value detection is carried out on the insulator of the power transmission line, the electroluminescent material emits fluorescence under the action of an electric field, and the insulator of the power transmission line is judged to be normal; when the electroluminescent material does not emit light any more, it is judged that the power transmission line insulator has a zero value phenomenon, and a worker can quickly lock the position of the zero value insulator; and a technical support is provided for zero value detection work of the insulator of the power transmission line.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a zero-value insulator detection device and method. Background Art

[0002] For a long time, insulators have been widely used in transmission lines of various voltage levels. Among various insulators, porcelain insulators have a simple structure, consisting of porcelain parts, cement adhesive, steel cap and iron feet. The temperature expansion coefficients of porcelain parts, steel caps and cement adhesives are quite different. Therefore, porcelain parts will be subjected to greater thermal stress when they are subjected to hot and cold changes during the operation of insulators. In addition, due to the different expansion coefficients of each phase of the porcelain structure, the porcelain parts will crack, and they are prone to internal breakdown under strong electric fields, becoming zero-value insulators, which becomes a hidden danger to the safe operation of the power grid.

[0003] In order to avoid the occurrence of power grid safety accidents, it is necessary to carry out zero-value monitoring of insulators. At present, the main zero-value detection methods for porcelain insulators include insulation resistance method, leakage current method, infrared temperature measurement method, etc., and have been maturely applied on the project site. However, facing the massive equipment to be tested in the complex operating environment of overhead lines, the above methods cannot fully meet the requirements of line operation and maintenance departments in terms of operation intensity, detection efficiency, environmental tolerance, construction safety, etc., and the proportion of false detection or missed detection is high. Therefore, it is urgent to propose an efficient, accurate, stable and safe zero-value porcelain insulator live detection technology. Summary of the invention

[0004] The embodiments of the present invention provide a zero-value insulator detection device and method to solve the above technical problems in the prior art.

[0005] In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended to be a general review, nor is it intended to identify key / important components or to delineate the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0006] According to a first aspect of an embodiment of the present invention, a zero-value insulator detection device is provided.

[0007] In one embodiment, the zero-value insulator detection device comprises:

[0008] The electroluminescent module is used to emit light according to the change of the insulator voltage using the electroluminescent material, so as to judge whether the insulator has a zero-value fault according to the light emission condition;

[0009] The voltage conduction module is used to collect the voltage across the insulator in real time, judge the insulator voltage, and supply power to the electroluminescent module according to the judgment result.

[0010] In one embodiment, the electroluminescent module comprises:

[0011] A light-emitting unit, used for emitting light according to a change in the insulator voltage;

[0012] An electrode, located in the light-emitting unit, for conducting electricity to the light-emitting unit;

[0013] The conductor is used to connect the electrode and the insulator and form a circuit loop between the insulator and the electrode.

[0014] In one embodiment, the light emitting unit is in the shape of a flat plate.

[0015] In one embodiment, the light emitting unit is made of zinc copper sulfide electroluminescent material and room temperature vulcanized silicone rubber.

[0016] In one embodiment, the mass ratio of the zinc copper sulfide electroluminescent material to the room temperature vulcanized silicone rubber is 4:10.

[0017] In one embodiment, the method for preparing the light-emitting unit includes:

[0018] According to a predetermined mass ratio, the zinc copper sulfide electroluminescent material and the room temperature vulcanized silicone rubber are mixed and stirred evenly to obtain a mixed solution;

[0019] The mixed solution is placed in a vacuum dryer for degassing, and after degassing, the mixed solution and the electrode are placed in a predetermined mold for solidification and drying to obtain a light-emitting unit.

[0020] In one embodiment, the electrode includes two parallel electrodes, and the two parallel electrodes are respectively located on two sides of the light emitting unit.

[0021] In one embodiment, there is a spacing between the two parallel electrodes, and the spacing is calculated by the formula:

[0022] d=U0×S / (I0×ρ)

[0023] I min <I0<I max

[0024] U0×S / (I min ×ρ)<d<U0×S / (I max ×ρ)

[0025] Where d is the distance between two parallel electrodes; S is the area of ​​a single parallel electrode; ρ is the resistivity of the light-emitting unit, U0 is the minimum conduction voltage of the voltage conduction module, I0 is the light-emitting current of the light-emitting unit; I min is the starting luminous current of the luminous unit, I maxIt is the maximum current that the light-emitting unit can withstand.

[0026] In one embodiment, the voltage conduction module is a voltage comparator.

[0027] In one embodiment, when the voltage conduction module judges the insulator voltage and supplies power to the electroluminescent module according to the judgment result, the voltage comparator is used to judge the voltage across the insulator collected in real time according to a predetermined voltage range threshold value. When the judgment result is that the voltage across the insulator is greater than the predetermined voltage range threshold value, the wire circuit is turned on to conduct electricity to the electrode.

[0028] In one embodiment, the predetermined voltage range threshold is set based on the voltage level of the circuit in which the insulator is located and the circuit position in which the insulator is located.

[0029] In one embodiment, judging whether an insulator has a zero-value fault according to the light emission condition includes:

[0030] When the electroluminescent module emits fluorescence, it is determined that the insulator has no zero-value fault;

[0031] When the electroluminescent module does not emit light, it is determined that a zero-value fault occurs in the insulator.

[0032] According to a second aspect of an embodiment of the present invention, a zero-value insulator detection method is provided.

[0033] In one embodiment, the zero-value insulator detection method includes:

[0034] Collect the voltage across the insulator in real time to obtain voltage data;

[0035] Comparing the voltage data with a predetermined voltage range threshold;

[0036] If the comparison result shows that the voltage data is greater than the predetermined voltage range threshold, the insulator voltage is transmitted to the electroluminescent module to cause the electroluminescent module to emit light; if the comparison result shows that the voltage data is less than or equal to the predetermined voltage range threshold, the circuit loop between the insulator and the electroluminescent module is cut off;

[0037] Whether there is a zero-value fault in the insulator is determined according to the light emission condition of the electroluminescent module.

[0038] In one embodiment, the predetermined voltage range threshold is set based on the voltage level of the circuit in which the insulator is located and the circuit position in which the insulator is located.

[0039] In one embodiment, the electroluminescent module includes: a light-emitting unit, an electrode and a wire, wherein the electrode is located inside the light-emitting unit, and the wire is connected to the electrode, and the other end of the wire extends to the outside of the light-emitting unit; the light-emitting unit is made of zinc copper sulfide electroluminescent material and room temperature vulcanized silicone rubber.

[0040] In one embodiment, determining whether an insulator has a zero-value fault according to the light emission of the electroluminescent module includes:

[0041] When the electroluminescent module emits fluorescence, it is determined that the insulator has no zero-value fault;

[0042] When the electroluminescent module does not emit light, it is determined that a zero-value fault occurs in the insulator.

[0043] The technical solution provided by the embodiment of the present invention may have the following beneficial effects:

[0044] The present invention can carry out rapid zero-value detection on insulators. When the zero-value detection is carried out on the insulator of a transmission line, the electroluminescent material emits fluorescence under the action of the electric field, and it is judged that the insulator of the transmission line is normal; when the electroluminescent material no longer emits light, it is judged that the insulator of the transmission line has a zero-value phenomenon, and the staff can quickly lock the position of the zero-value insulator, thereby providing technical support for the zero-value detection of the insulator of the transmission line.

[0045] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0047] Figure 1 is a structural schematic diagram of a zero-value insulator detection device according to an exemplary embodiment;

[0048] Figure 2 The present invention is a flow chart of a method for detecting a zero-value insulator according to an exemplary embodiment.

[0049] Reference numerals:

[0050] 1. Electroluminescent module; 101. Light-emitting unit; 102. Electrode; 103. Wire; 2. Insulator; 3. Voltage conduction module; 4. Current limiting resistor. DETAILED DESCRIPTION

[0051] The following description and accompanying drawings fully illustrate the specific embodiments of this article so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this article includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, without requiring or implying any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the structure, device or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such structure, device or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the structure, device or equipment including the elements. Each embodiment is described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0052] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in this document indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, it can also be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0053] As used herein, unless otherwise specified, the term "plurality" means two or more than two.

[0054] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0055] In this article, the term "and / or" is a description of the association relationship between objects, indicating that three relationships may exist. For example, A and / or B means: A or B, or, A and B.

[0056] It should be understood that, although the various steps in the flow chart are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these sub-steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0057] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0058] Figure 1 An embodiment of a zero-value insulator detection device of the present invention is shown.

[0059] In this optional embodiment, the zero-value insulator detection device includes: an electroluminescent module 1, which is used to use electroluminescent materials to emit light according to the voltage change of the insulator 2, so as to judge whether the insulator 2 has a zero-value fault according to the light emission situation; a voltage conduction module 3, which is used to collect the voltage at both ends of the insulator 2 in real time, and judge the voltage of the insulator 2, and power the electroluminescent module 1 according to the judgment result.

[0060] Continue to refer Figure 1 As shown, in this optional embodiment, the electroluminescent module 1 includes: a light-emitting unit 101, which is used to emit light according to the change of the insulator voltage; an electrode 102, located in the light-emitting unit 101, which is used to conduct electricity to the light-emitting unit 101; a wire 103, which is used to connect the electrode 102 and the insulator 1, and form a circuit loop between the insulator 1 and the electrode 102.

[0061] In this optional embodiment, the light emitting unit 101 is in the shape of a flat plate; the light emitting unit 101 is made of zinc copper sulfide electroluminescent material and room temperature vulcanized silicone rubber; the mass ratio of the zinc copper sulfide electroluminescent material to the room temperature vulcanized silicone rubber is 4:10.

[0062] Specifically, the preparation method of the light-emitting unit 101 includes: mixing the zinc copper sulfide electroluminescent material and the room temperature vulcanized silicone rubber according to a predetermined mass ratio, and stirring them evenly to obtain a mixed solution; placing the mixed solution in a vacuum dryer for degassing, and after degassing, placing the mixed solution and the electrode in a predetermined mold for solidification and drying to obtain a light-emitting unit.

[0063] In this optional embodiment, the electrode 102 includes two parallel electrodes, and the two parallel electrodes are respectively located on both sides of the light-emitting unit 101; and there is a spacing between the two parallel electrodes, and the calculation formula of the spacing is:

[0064] d=U0×S / (I0×ρ)

[0065] I min <I0<I max

[0066] U0×S / (I min ×ρ)<d<U0×S / (I max ×ρ)

[0067] Where d is the distance between two parallel electrodes; S is the area of ​​a single parallel electrode; ρ is the resistivity of the light-emitting unit, U0 is the minimum conduction voltage of the voltage conduction module, I0 is the light-emitting current of the light-emitting unit; I min is the starting luminous current of the luminous unit, I max It is the maximum current that the light-emitting unit can withstand.

[0068] In this optional embodiment, the voltage conduction module 3 is actually a voltage comparator. When performing voltage judgment and power supply conduction, the voltage comparator is used to judge the voltage across the insulator collected in real time according to a predetermined voltage range threshold. When the judgment result is that the voltage across the insulator is greater than the predetermined voltage range threshold, the conductor circuit is turned on to conduct electricity to the electrode.

[0069] The predetermined voltage level threshold is set based on the voltage level of the circuit in which the insulator is located and the circuit position in which the insulator is located. When judging whether the insulator has a zero-value fault based on the light emission, if the electroluminescent module 1 emits fluorescence, it is judged that the insulator 2 has no zero-value fault; if the electroluminescent module 1 does not emit light, it is judged that the insulator 2 has a zero-value fault.

[0070] In addition, in specific applications, in order to ensure the operation of the circuit loop, a current limiting resistor 4 may be connected between the electrode 102 and the voltage comparator to limit the current flowing into the electrode, thereby ensuring the safe use of the electrode 102 and the light-emitting unit 101.

[0071] Figure 2 An embodiment of a zero-value insulator detection method of the present invention is shown.

[0072] In this optional embodiment, the zero-value insulator detection method includes:

[0073] Step S201, collecting the voltage across the insulator in real time to obtain voltage data;

[0074] Step S203, comparing the voltage data with a predetermined voltage level threshold;

[0075] Step S205, when the comparison result is that the voltage data is greater than the predetermined voltage range threshold, the insulator voltage is transmitted to the electroluminescent module to cause the electroluminescent module to emit light; when the comparison result is that the voltage data is less than or equal to the predetermined voltage range threshold, the circuit loop between the insulator and the electroluminescent module is cut off;

[0076] Step S207, determining whether the insulator has a zero-value fault according to the light emission of the electroluminescent module (specifically, when the electroluminescent module emits fluorescence, it is determined that the insulator has no zero-value fault; when the electroluminescent module does not emit light, it is determined that the insulator has a zero-value fault).

[0077] In order to facilitate understanding of the above technical solution of the present invention, the above technical solution of the present invention is described in detail below based on the light emitting principle.

[0078] The electroluminescent effect refers to a solid luminescence phenomenon in which electrons and holes recombine and emit light under the excitation of a high DC or AC electric field, directly converting electrical energy into light energy. The luminescence process of electroluminescent materials requires the participation of free electrons. According to the source of free electrons, they can be divided into injected electroluminescent materials and intrinsic electroluminescent materials. The free electrons of injected electroluminescent materials come from external injection, and organic electroluminescent materials belong to injected electroluminescent materials. In addition to the electrons injected from the outside, intrinsic electroluminescent materials can also generate electrons inside the material to supply light in a high field strength environment. Therefore, injecting electrons at the same time in a high field strength environment can effectively reduce the starting luminescence field intensity of the intrinsic material.

[0079] When electroluminescent materials emit light under the action of high electric fields, electrons at deep energy levels in the materials are accelerated by the electric field to become superheated electrons. When superheated electrons collide with luminescent centers, the energy of the electrons in the luminescent centers jumps from the ground state energy level to the high energy level. When the electrons in the luminescent centers return from the high energy level to the ground state energy level, photons are released to make the material emit light. Common electroluminescent materials use pure substances as the main matrix material, mixed with a small amount of impurities that activate the matrix, i.e., "activators". The activators themselves form luminescent centers, or the activators and surrounding ions or lattice defects form luminescent centers, so that the matrix material with no luminescent properties or poor luminescent properties obtains stronger luminescent properties.

[0080] As for insulators, the potential distribution of insulator strings is usually an asymmetric U-shaped curve. There is a fixed U-shaped voltage distribution curve on a certain type of insulator string of transmission lines of different voltage levels. When every insulator in the string is a good insulator, the voltage borne by each insulator is called the standard voltage. When zero-value insulators appear in the insulator string, the voltage borne by the zero-value insulator itself drops significantly, resulting in a significant difference between the voltage value of the insulators in the string and the voltage value in the standard U-shaped voltage distribution curve.

[0081] "DL / T626-2005 Inspection Procedure for Degraded Disc Suspension Insulators" gives the standard values ​​of distributed voltage for disc suspension insulators of various voltage levels from 35kV to 500kV, and judges insulator segments with actual voltage values ​​at both ends lower than the standard voltage value by 50% as degraded insulators.

[0082] Therefore, based on the above principle, the present invention uses a voltage comparator, a flat electrode, and an electroluminescent material to form a zero value rapid detection device. When the insulator sheet works normally, the device detects that the voltage on both sides exceeds the predetermined voltage range threshold, the loop where the electrode is located is turned on, and a uniform electric field appears between the electrodes, and the electric field can excite the electroluminescent material to emit fluorescence. When the insulator sheet appears zero value, the device detects that the voltage on both sides does not reach the predetermined voltage range threshold, the loop where the electrode is located is not turned on, and the electroluminescent material does not emit fluorescence.

[0083] In addition, in specific applications, for the predetermined voltage range threshold, the distributed voltage standard value of the insulator to be tested can be queried through the "DL / T626-2005 Deteriorated Disc Type Suspension Insulator Inspection Procedure" and the predetermined voltage range threshold can be set at 50% of the voltage standard value.

[0084] With the aid of the above technical scheme, the present invention can carry out rapid zero-value detection on insulators. When the zero-value detection of the transmission line insulator is performed, the electroluminescent material emits fluorescence under the action of the electric field, and it is judged that the transmission line insulator is normal; when the electroluminescent material no longer emits light, it is judged that the transmission line insulator has a zero-value phenomenon, and the staff can quickly lock the position of the zero-value insulator; thus, technical support is provided for the zero-value detection of the transmission line insulator.

[0085] The present invention is not limited to the structures which have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A zero value insulator detection device, characterized in that: include: The electroluminescent module is used to emit light according to the change of the insulator voltage using the electroluminescent material, so as to judge whether the insulator has a zero-value fault according to the light emission condition; The voltage conduction module is used to collect the voltage across the insulator in real time, judge the insulator voltage, and supply power to the electroluminescent module according to the judgment result.

2. The zero-value insulator detection device according to claim 1, characterized in that: The electroluminescent module comprises: A light-emitting unit, used for emitting light according to a change in the insulator voltage; An electrode, located in the light-emitting unit, for conducting electricity to the light-emitting unit; The conductor is used to connect the electrode and the insulator and form a circuit loop between the insulator and the electrode.

3. The zero-value insulator detection device according to claim 2, characterized in that: The light emitting unit is in the shape of a flat plate.

4. The zero-value insulator detection device according to claim 3, characterized in that: The light-emitting unit is made of zinc copper sulfide electroluminescent material and room temperature vulcanized silicone rubber.

5. The zero-value insulator detection device according to claim 4, characterized in that: The mass ratio of the zinc copper sulfide electroluminescent material to the room temperature vulcanized silicone rubber is 4:

10.

6. The zero-value insulator detection device according to claim 5, characterized in that: The preparation method of the light-emitting unit comprises: According to a predetermined mass ratio, the zinc copper sulfide electroluminescent material and the room temperature vulcanized silicone rubber are mixed and stirred evenly to obtain a mixed solution; The mixed solution is placed in a vacuum dryer for degassing, and after degassing, the mixed solution and the electrode are placed in a predetermined mold for solidification and drying to obtain a light-emitting unit.

7. The zero-value insulator detection device according to claim 2, characterized in that: The electrode comprises two parallel electrodes, and the two parallel electrodes are respectively located on two sides of the light emitting unit.

8. The zero-value insulator detection device according to claim 7, characterized in that: There is a spacing between two parallel electrodes, and the calculation formula for the spacing is: d=U0×S / (I0×ρ) I min <I0<I max U0×S / (I min ×ρ)<d<U0×S / (I max ×ρ) Where d is the distance between two parallel electrodes; S is the area of ​​a single parallel electrode; ρ is the resistivity of the light-emitting unit, U0 is the minimum conduction voltage of the voltage conduction module, I0 is the light-emitting current of the light-emitting unit; I min is the starting luminous current of the luminous unit, I max It is the maximum current that the light-emitting unit can withstand.

9. The zero-value insulator detection device according to claim 2, characterized in that: The voltage conduction module is a voltage comparator.

10. The zero-value insulator detection device according to claim 9, characterized in that: When the voltage conduction module judges the insulator voltage and supplies power to the electroluminescent module according to the judgment result, the voltage comparator is used to judge the voltage across the insulator collected in real time according to the predetermined voltage range threshold value. When the judgment result is that the voltage across the insulator is greater than the predetermined voltage range threshold value, the wire circuit is turned on to conduct electricity to the electrode.

11. The zero-value insulator detection device according to claim 10, characterized in that: The predetermined voltage position threshold is set based on the voltage level of the circuit in which the insulator is located and the circuit position in which the insulator is located.

12. The zero-value insulator detection device according to claim 1, characterized in that: According to the luminous condition, judging whether there is a zero-value fault in the insulator includes: When the electroluminescent module emits fluorescence, it is determined that the insulator has no zero-value fault; When the electroluminescent module does not emit light, it is determined that a zero-value fault occurs in the insulator.

13. A method for detecting a zero-value insulator, characterized in that: include: Collect the voltage across the insulator in real time to obtain voltage data; Comparing the voltage data with a predetermined voltage range threshold; When the comparison result shows that the voltage data is greater than the predetermined voltage range threshold, the insulator voltage is transmitted to the electroluminescent module to cause the electroluminescent module to emit light; If the comparison result shows that the voltage data is less than or equal to the predetermined voltage range threshold, cutting off the circuit loop between the insulator and the electroluminescent module; Whether there is a zero-value fault in the insulator is determined according to the light emission condition of the electroluminescent module.

14. The method for detecting zero-value insulators according to claim 13, characterized in that: The predetermined voltage position threshold is set based on the voltage level of the circuit in which the insulator is located and the circuit position in which the insulator is located.

15. The method for detecting zero-value insulators according to claim 14, characterized in that: The electroluminescent module comprises: a light-emitting unit, an electrode and a wire, wherein the electrode is located inside the light-emitting unit, the electrode is connected to the wire, and the other end of the wire extends to the outside of the light-emitting unit; the light-emitting unit is made of zinc copper sulfide electroluminescent material and room temperature vulcanized silicone rubber.

16. The method for detecting zero-value insulators according to claim 13, characterized in that: Determining whether an insulator has a zero-value fault according to the light emission of the electroluminescent module includes: When the electroluminescent module emits fluorescence, it is determined that the insulator has no zero-value fault; When the electroluminescent module does not emit light, it is determined that a zero-value fault occurs in the insulator.

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