Partial discharge and positioning device based on nuclear phase hole of switch cabinet

Abstract

The utility model discloses a partial discharge and positioning device based on a nuclear phase hole of a switch cabinet. The partial discharge and positioning device based on the nuclear phase hole of the switch cabinet comprises a connecting part and a circuit board, the connecting part is suitable for being connected to a nuclear phase hole of the switch cabinet; the circuit board is provided with a phase detection circuit, and the phase detection circuit is used for detecting a switch cabinet input signal through a nuclear phase hole of the switch cabinet, and forming partial discharge phase diagram data based on the switch cabinet input signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of switch cabinet detection, in particular to a partial discharge and positioning device based on a switch cabinet nuclear phase hole. BACKGROUND

[0002] The switch cabinet is an electrical equipment, which mainly functions to open, close, control and protect the electrical equipment in the process of power generation, power transmission, power distribution and power conversion in the power system. The cable is connected to the cable joint of the switch cabinet from the outside to realize external line access.

[0003] Partial discharge (PD) is a common local insulation breakdown phenomenon in the insulation system of electrical equipment, and its monitoring and analysis is crucial to ensure the safe operation of electrical equipment. Strengthening the discharge detection of the switch cabinet can effectively improve the reliability of the power transmission circuit. The insulation defects of the cable joint or cable are important causes of the partial discharge of the switch cabinet. Specifically, the insulation defects of the cable joint or cable may cause abnormal increase of the electric field strength at the defect, and the local electric field may cause partial discharge, and even cause power transmission line failure. The cable joint or cable may form insulation defects due to its own manufacturing process or external damage, for example, insulation layer ring peeling knife marks, conductor surface adhering metal particles, and conductive particles mixed into the insulation layer. CONTENT OF THE INVENTION

[0004] An advantage of the present application is to provide a partial discharge and positioning device based on a switch cabinet nuclear phase hole, wherein the partial discharge and positioning device based on the switch cabinet nuclear phase hole can not only detect the insulation defects of the cable joint or cable, but also judge the defect type and locate the defect position.

[0005] According to one aspect of the present application, a partial discharge and positioning device based on a switch cabinet nuclear phase hole is provided, which comprises:

[0006] A connection part adapted to be connected to the nuclear phase hole of the switch cabinet;

[0007] A circuit board provided with a phase detection circuit, the phase detection circuit being used to detect the switch cabinet input signal through the nuclear phase hole of the switch cabinet, and form a partial discharge phase diagram data based on the switch cabinet input signal.

[0008] In an embodiment of the partial discharge and positioning device based on the switch cabinet nuclear phase hole according to the present application, the phase detection circuit comprises a filter circuit and an amplifier circuit, wherein the filter circuit is connected to the connection part and is used to filter the switch cabinet input signal received thereby to form a filtered signal; and the amplifier circuit is connected to the filter circuit and is used to amplify the filtered signal to form an amplified signal.

[0009] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the phase detection circuit comprises a filter circuit and an amplification circuit, wherein the amplification circuit is connected to the connecting part and is used to amplify the switch cabinet input signal received thereby to form an amplified signal; and the filter circuit is connected to the amplification circuit and is used to filter the amplified signal to form a filtered signal.

[0010] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the phase detection circuit further comprises a spectrum diagram generation circuit connected to the amplification circuit and used to generate partial discharge phase diagram data based on the amplified signal.

[0011] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the phase detection circuit further comprises a spectrum diagram generation circuit connected to the filter circuit and used to generate partial discharge phase diagram data based on the filtered signal.

[0012] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the spectrum diagram generation circuit comprises a sampling circuit and a processor; the sampling circuit is connected to the amplification circuit and is used to collect the amplified signal and convert the amplified signal into a digital signal; and the processor is connected to the sampling circuit and is used to generate partial discharge phase diagram data based on the digital signal.

[0013] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the spectrum diagram generation circuit comprises a sampling circuit and a processor; the sampling circuit is connected to the filter circuit and is used to collect the filtered signal and convert the filtered signal into a digital signal; and the processor is connected to the sampling circuit and is used to generate partial discharge phase diagram data based on the digital signal.

[0014] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the connecting part comprises three pins adapted to be inserted into the nuclear phase holes of the corresponding switch cabinet respectively.

[0015] In an embodiment of the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet according to the present application, the partial discharge and positioning device based on the nuclear phase hole of the switch cabinet further comprises a storage connected to the phase detection circuit and used to store the partial discharge phase diagram data.

[0016] The further purposes and advantages of the present application will be fully apparent from the following description and drawings.

[0017] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description of embodiments thereof, taken in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 Fig. 1 illustrates a block diagram of a partial discharge and positioning device based on a switch cabinet nuclear phase hole according to embodiments of the present application. DETAILED DESCRIPTION

[0020] Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are merely a part of embodiments of the present application, and that the present application is not limited to the described embodiments. In the drawings:

[0021] It is to be understood that the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the term "or" as used herein encompasses both the conjunctive and disjunctive sense of the term, unless the context clearly dictates otherwise.

[0022] Although ordinal numbers such as "first," "second," etc., will be used to describe various components, the components are not limited by the ordinal numbers. The ordinal numbers are used merely to distinguish a component from another. For example, a first component can be referred to as a second component, and similarly, a second component can also be referred to as a first component without departing from the teachings of the present application. The term "and / or" used herein includes any and all combinations of one or more associated listed items.

[0023] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has," when used in this specification, specify the presence of stated features, numbers, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, components, elements, or combinations thereof.

[0024] Cable joints or insulation defects in cables are a significant cause of partial discharge (PD) in switchgear. Switchgear energizers are equipped with phase-comparison holes, which can be used to detect PD and other conditions within the switchgear. Specifically, the phase-comparison holes are connected to the cables through various components, forming a pathway. When an insulation defect occurs within the cable, the resulting traveling wave signal propagates along the cable and eventually reaches the phase-comparison hole. The traveling wave signal can be analyzed through the phase-comparison hole to generate a phase-resolved partial discharge (PRPD) data, which helps determine the defect type and locate the cable joints or insulation defects in the cables.

[0025] Accordingly, such as Figure 1 As shown, a partial discharge and positioning device 1 based on a switchgear phase hole according to an embodiment of this application is explained. Figure 1 As shown, the partial discharge and positioning device 1 based on the phase hole of the switch cabinet according to an embodiment of this application includes a connecting part 10 and a circuit board 20; wherein, the connecting part 10 is adapted to be connected to the phase hole of the switch cabinet; the circuit board 20 is provided with a phase detection circuit 210, the phase detection circuit 210 is used to detect the switch cabinet input signal through the phase hole of the switch cabinet, and form partial discharge phase diagram data based on the switch cabinet input signal.

[0026] Specifically, in one example of this application, the connecting part 10 includes three pins 11, adapted to be inserted into the corresponding phase holes of the switch cabinet.

[0027] The phase detection circuit 210 can be any circuit capable of generating the partial discharge phase diagram data based on the switch cabinet input signal.

[0028] In one example of this application, the phase detection circuit 210 includes a filter circuit 21 and an amplifier circuit 22. The filter circuit 21 is connected to the connection portion 10 and is used to filter the received switchgear input signal to form a filtered signal. The amplifier circuit 22 is connected to the filter circuit 21 and is used to amplify the filtered signal to form an amplified signal. The phase detection circuit 210 also includes a spectrum generation circuit 23, which is connected to the amplifier circuit 22 and is used to generate the partial discharge phase map data based on the amplified signal. The spectrum generation circuit 23 includes a sampling circuit and a processor. The sampling circuit is connected to the amplifier circuit 22 and is used to acquire the amplified signal and convert the amplified signal into a digital signal. The processor is connected to the sampling circuit and is used to generate the partial discharge phase map data based on the digital signal.

[0029] In another example of the present application, the phase detection circuit 210 comprises a filter circuit 21 and an amplification circuit 22, wherein the amplification circuit 22 is connected to the connecting portion 10 and is configured to amplify the switch cabinet input signal received thereby to form an amplified signal; and the filter circuit 21 is connected to the amplification circuit 22 and is configured to filter the amplified signal to form a filtered signal. The phase detection circuit 210 further comprises a spectrum diagram generation circuit 23 connected to the filter circuit 21 and configured to generate the partial discharge phase diagram data based on the filtered signal. The spectrum diagram generation circuit 23 comprises a sampling circuit and a processor; the sampling circuit is connected to the filter circuit 21 and is configured to acquire the filtered signal and convert the filtered signal into a digital signal; and the processor is connected to the sampling circuit and is configured to generate the partial discharge phase diagram data based on the digital signal.

[0030] The partial discharge and positioning device based on the switch cabinet nuclear phase hole 1 can be provided with a display screen, or is adapted to be connected to a display screen, so as to display the partial discharge phase diagram data.

[0031] The partial discharge and positioning device based on the switch cabinet nuclear phase hole 1 can be provided with a storage connected to the phase detection circuit 210 and configured to store the partial discharge phase diagram data.

[0032] In summary, the partial discharge and positioning device based on the switch cabinet nuclear phase hole 1 according to the embodiments of the present application is illustrated, which can not only detect the insulation defects of the cable joint or cable, but also determine the defect type and locate the defect position.

[0033] The above describes the present application and its embodiments, which is not restrictive, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired by it, without departing from the purpose of the present application, without creating a similar structure and embodiment of the technical solution, which should belong to the protection scope of the present application.

Claims

1. A partial discharge and positioning device based on the nuclear phase hole of the switch cabinet, characterized in that, The utility model relates to a local discharge and positioning device based on switch cabinet nuclear phase hole, comprising: a connecting part suitable for being connected to a nuclear phase hole of a switch cabinet; a circuit board provided with a phase detection circuit, which is used for detecting a switch cabinet input signal through the nuclear phase hole of the switch cabinet and forming local discharge phase map data based on the switch cabinet input signal.

2. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 1, characterized in that, The phase detection circuit comprises a filter circuit and an amplifier circuit, wherein the filter circuit is connected to the connecting part and is used for filtering the switch cabinet input signal received thereby to form a filtered signal; and the amplifier circuit is connected to the filter circuit and is used for amplifying the filtered signal to form an amplified signal.

3. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 1, characterized in that, The phase detection circuit comprises a filter circuit and an amplifier circuit, wherein the amplifier circuit is connected to the connecting part and is used for amplifying the switch cabinet input signal received thereby to form an amplified signal; and the filter circuit is connected to the amplifier circuit and is used for filtering the amplified signal to form a filtered signal.

4. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 2, characterized in that, The phase detection circuit further comprises a spectrum map generation circuit connected to the amplifier circuit and used for generating the local discharge phase map data based on the amplified signal.

5. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 3, characterized in that, The phase detection circuit further comprises a spectrum map generation circuit connected to the filter circuit and used for generating the local discharge phase map data based on the filtered signal.

6. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 4, characterized in that, The spectrum map generation circuit comprises a sampling circuit and a processor; the sampling circuit is connected to the amplifier circuit and is used for collecting the amplified signal and converting the amplified signal into a digital signal; and the processor is connected to the sampling circuit and is used for generating the local discharge phase map data based on the digital signal.

7. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 5, characterized in that, The spectrum map generation circuit comprises a sampling circuit and a processor; the sampling circuit is connected to the filter circuit and is used for collecting the filtered signal and converting the filtered signal into a digital signal; and the processor is connected to the sampling circuit and is used for generating the local discharge phase map data based on the digital signal.

8. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 1, characterized in that, The connecting part comprises three pins suitable for being inserted into corresponding nuclear phase holes of the switch cabinet.

9. The partial discharge and location device based on the nuclear phase hole of the switch cabinet according to claim 1, characterized in that, The local discharge and positioning device based on switch cabinet nuclear phase hole further comprises a storage connected to the phase detection circuit and used for storing the local discharge phase map data.

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