On-line monitoring device for partial discharge of transformer

Abstract

The utility model discloses a transformer partial discharge on-line monitoring device, comprising a host, a communication assembly, a terminal strip assembly and a channel assembly, the communication assembly, the terminal strip assembly and the channel assembly are respectively connected with the host, and the communication assembly is connected with the terminal strip assembly; and the movable assembly and the main machine are jointly connected and can be arranged in a turnover mode. According to the utility model, through real-time acquisition and processing of partial discharge signals and capturing and positioning of intermittent signals, automatic positioning of a partial discharge source position in a GIS is realized, and the device is used for measuring ultrahigh-frequency and high-frequency pulse signals emitted by partial discharge in insulation of high-voltage equipment so as to analyze the insulation state of the high-voltage equipment; the system can be placed on site for real-time monitoring, adapts to the severe environment on site, and greatly reduces the labor cost.

Description

Technical Field

[0001] The utility model relates to the field of partial discharge detection equipment, in particular to an online monitoring device for partial discharge of a transformer. Background Art

[0002] In recent years, ultra-high frequency partial discharge live detection of high-voltage equipment such as transformers has become an important means of evaluating the insulation performance of equipment. However, only detecting the existence of partial discharge signals is far from enough for risk assessment and guiding maintenance. Accurately locating the partial discharge source is an indispensable step in equipment maintenance. Utility Model Content

[0003] The utility model aims to provide an online monitoring device for partial discharge of transformers, which is used to solve the problems that conventional ultra-high frequency partial discharge detectors for transformers are too large in size, inaccurate in positioning and unable to detect around the clock.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] A transformer partial discharge online monitoring device comprises: a host, a communication component, a terminal block component and a channel component respectively connected to the host, wherein the communication component is connected to the terminal block component;

[0006] It also includes a movable component, which is connected to the host and can be turned over.

[0007] Preferably, it further comprises a chassis, the movable component is arranged in the chassis, and the movable component drives the host to flip around the edge in the chassis.

[0008] Preferably, the movable component includes: a guide rail, a fixed plate and a flip member, the fixed plate is vertically arranged in the chassis, the flip member is arranged on the fixed plate, one side of the guide rail is arranged on the flip member, and the other side is connected to the host.

[0009] Preferably, the flip component includes: a first hinge, a second hinge, a threaded member and a latch, the first hinge and the second hinge are sleeved on the latch, the threaded member is symmetrically arranged on the first hinge and the second hinge respectively, the first hinge cooperates with the threaded member to connect the fixed plate, and the second hinge cooperates with the threaded member to connect the guide rail.

[0010] Preferably, the middle of the guide rail is hollowed out and is provided with a first connection hole for connecting to the host and a second connection hole for connecting to the second hinge.

[0011] Preferably, the first hinge is symmetrically provided with third connection holes for connecting to the fixing plate, and the second hinge is symmetrically provided with fourth connection holes for connecting to the guide rail.

[0012] Preferably, the terminal row assembly includes: L terminals, E terminals, N terminals, PT terminals, humidity sensors, fuses and heaters connected in sequence, and fixed terminals and isolation plates, the isolation plates are arranged between the L terminals, E terminals, N terminals and PT terminals, and the fixed terminals are respectively arranged on one side of the L terminal, and between the fuse and the heater.

[0013] Preferably, the channel component includes: a humidity channel, a partial discharge channel, a power channel and an optical fiber channel, the humidity channel and the power channel are connected to the terminal block component, the partial discharge channel is connected to the host, and the optical fiber channel is connected to the communication component.

[0014] Preferably, the chassis is a rectangular parallelepiped structure, a receiving cavity is provided inside the chassis, and a flip surface is provided on the top of the chassis.

[0015] Preferably, a lock buckle is provided on the flip cover surface.

[0016] The utility model realizes a reasonable layout inside the monitoring device by flipping the main unit through the internal active components, adopts optical fiber communication to collect and process the local discharge signal in real time, captures and locates the intermittent signal, realizes the automatic location of the local discharge source in the GIS, is used to measure the ultra-high frequency and high-frequency pulse signals emitted by the local discharge in the transformer insulation, and then analyzes the insulation state, can be placed on-site for real-time monitoring, has a simple structure, and can adapt to the harsh environment on-site. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 It is the terminal block assembly and schematic diagram of the utility model;

[0020] The markings in the figure are as follows: 1-host; 2-communication component; 3-terminal block component; 4-channel component; 5-movable component; 6-chassis; 7-guide rail; 8-fixed plate; 9-flip member; 10-first hinge; 11-second hinge; 12-threaded member; 13-latch; 14-first connecting hole; 15-second connecting hole; 16-third connecting hole; 17-fourth connecting hole; 18-L terminal; 19-E terminal; 20-N terminal; 21-PT terminal; 22-humidity sensor; 23-fuse; 24-heater; 25-fixed terminal; 26-isolating sheet; 27-humidity channel; 28-partial discharge channel; 29-power channel; 30-optical fiber channel; 31-accommodating cavity; 32-flip surface; 33-support column. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described below in conjunction with the embodiments and drawings.

[0022] A transformer partial discharge online monitoring device comprises: a host 1, a communication component 2, a terminal block component 3 and a channel component 4 respectively connected to the host 1, wherein the terminal block component 3 is fixedly arranged at the bottom of a receiving cavity 31 of a chassis 6, the communication component 2, i.e., an optical fiber box, is also arranged in the chassis 6 and arranged above and below the terminal block component 3, the host 1 is arranged in the chassis 6 and arranged at the upper ends of the communication component 2 and the terminal block component 3, and the channel component 4 is arranged on the side of the chassis 6;

[0023] The movable component 5 is also included. The movable component 5 is connected to the main body 1 through threads and can drive the main body 1 to turn over in the accommodating cavity 31.

[0024] A further implementation of this embodiment also includes a chassis 6, and the movable component 5 is arranged at the bottom of the chassis 6 and at the common left side of the terminal block component 3 and the communication component 2. The movable component 5 drives the host 1 to flip around the edge in the chassis 6.

[0025] In a further implementation manner of this embodiment, the movable component 5 includes: a guide rail 7, a fixed plate 8 and a flipping member 9, the fixed plate 8 is vertically fixed to the left side of the terminal block component 3 and the communication component 2, the flipping member 9 is fixedly connected to the fixed plate 8 by a threaded member 12, one side of the guide rail 7 is set on the flipping member 9 by a threaded member 12, and the other side is connected to the side edge of the bottom surface of the main unit 1 by a threaded member 12, the guide rail 7 integrally connected to the flipping mechanism can drive the main unit 1 to flip around the guide rail 7 as the center, and a support column 33 is set on the right side of the terminal block component 3 and the optical fiber box to keep the main unit 1 horizontally set in an unflipped state.

[0026] In a further implementation manner of the present embodiment, the flip component 9 includes: a first hinge 10, a second hinge 11, a threaded member 12 and a latch 13. The first hinge 10 and the second hinge 11 are sleeved on the latch 13. The first hinge 10 and the second hinge 11 can rotate around the latch 13. The threaded member 12 is symmetrically arranged on the first hinge 10 and the second hinge 11, as well as various positions where the main unit 1 and the guide rail 7 are connected. The first hinge 10 cooperates with the threaded member 12 to connect to the fixed plate 8, and the second hinge 11 cooperates with the threaded member 12 to connect to the guide rail 7.

[0027] In a further implementation manner of this embodiment, the guide rail 7 is hollowed out in the middle and is provided with a first connection hole 14 for connecting to the host 1 and a second connection hole 15 for connecting to the second hinge 11 .

[0028] In a further implementation manner of this embodiment, the first hinge 10 is symmetrically provided with third connection holes 16 for connecting to the fixing plate 8 , and the second hinge 11 is symmetrically provided with fourth connection holes 17 for connecting to the guide rail 7 .

[0029] In a further implementation manner of the present embodiment, the terminal row assembly 3 includes: an L terminal 18, an E terminal 19, an N terminal 20, a PT terminal 21, a humidity sensor 22, a fuse 23 and a heater 24 connected in sequence, as well as a fixed terminal 25 and an isolation plate 26, the isolation plate 26 being arranged between the L terminal 18, the E terminal 19, the N terminal 20 and the PT terminal 21, and the fixed terminals 25 being respectively arranged on one side of the L terminal 18, and between the fuse 23 and the heater 24.

[0030] In a further implementation manner of this embodiment, the channel component 4 includes: a humidity channel 27 for collecting on-site humidity conditions, a partial discharge channel 28 for collecting on-site partial discharge signals, a power supply channel 29 for connecting power supply and synchronization signals, and an optical fiber channel 30 for transmitting signals. The humidity channel 27 and the power supply channel 29 are connected to the terminal block component 3, the partial discharge channel 28 is connected to the host 1, and the optical fiber channel 30 is connected to the communication component 2.

[0031] In a further implementation manner of this embodiment, the chassis 6 is a rectangular parallelepiped structure, a receiving cavity 31 is provided inside the chassis 6 , and a flip surface 32 is provided on the top of the chassis 6 .

[0032] In a further implementation manner of this embodiment, a lock is provided on the flip cover surface 32 to prevent interference from external climate and other conditions during normal detection.

[0033] In a further implementation manner of this embodiment, a UHF partial discharge sensor is connected to the partial discharge channel 28 at the transformer site to receive high-frequency electromagnetic waves. After the signal is converted into analog to digital, the time difference of the pulse signals received by any two UHF partial discharge sensors is automatically calculated. Based on the partial discharge PRPD spectra in the two channels, the distance between the partial discharge source and the two sensors is automatically displayed through statistics of several positioning results.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A transformer partial discharge online monitoring device, characterized in that: include: A host, a communication component, a terminal block component and a channel component respectively connected to the host, wherein the communication component is connected to the terminal block component; It also includes: an active component, which is connected to the host and can be turned over.

2. The transformer partial discharge online monitoring device according to claim 1, characterized in that: It also includes a chassis, the movable component is arranged in the chassis, and the movable component drives the host to flip around the edge in the chassis.

3. The transformer partial discharge online monitoring device according to claim 2 is characterized in that: The movable component comprises: a guide rail, a fixed plate and a flip member, the fixed plate is vertically arranged in the chassis, the flip member is arranged on the fixed plate, one side of the guide rail is arranged on the flip member, and the other side is connected to the host.

4. The transformer partial discharge online monitoring device according to claim 3 is characterized in that: The flip component includes: a first hinge, a second hinge, a threaded member and a latch, the first hinge and the second hinge are sleeved on the latch, the threaded member is symmetrically arranged on the first hinge and the second hinge respectively, the first hinge cooperates with the threaded member to connect the fixed plate, and the second hinge cooperates with the threaded member to connect the guide rail.

5. The transformer partial discharge online monitoring device according to claim 4, characterized in that: The middle of the guide rail is hollowed out and is provided with a first connection hole for connecting to the host and a second connection hole for connecting to the second hinge.

6. The transformer partial discharge online monitoring device according to claim 4, characterized in that: The first hinge is symmetrically provided with third connection holes for connecting to the fixing plate, and the second hinge is symmetrically provided with fourth connection holes for connecting to the guide rail.

7. The transformer partial discharge online monitoring device according to claim 1, characterized in that: The terminal row assembly includes: an L terminal, an E terminal, an N terminal, a PT terminal, a humidity sensor, a fuse and a heater connected in parallel in sequence, as well as a fixed terminal and an isolation plate, the isolation plate is arranged between the L terminal, the E terminal, the N terminal and the PT terminal, and the fixed terminals are respectively arranged on one side of the L terminal and between the fuse and the heater.

8. The transformer partial discharge online monitoring device according to claim 1, characterized in that: The channel component includes: a humidity channel, a partial discharge channel, a power channel and an optical fiber channel. The humidity channel and the power channel are connected to the terminal row component, the partial discharge channel is connected to the host, and the optical fiber channel is connected to the communication component.

9. The transformer partial discharge online monitoring device according to claim 2, characterized in that: The chassis is a rectangular parallelepiped structure, a receiving cavity is arranged inside the chassis, and a flip cover surface is arranged on the top of the chassis.

10. The transformer partial discharge online monitoring device according to claim 9, characterized in that: A lock buckle is arranged on the flip cover surface.

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