AU2020239762A1 - Device and method for detecting partial discharge of gas insulated switchgear based on flange bolt - Google Patents
Device and method for detecting partial discharge of gas insulated switchgear based on flange bolt Download PDFInfo
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- AU2020239762A1 AU2020239762A1 AU2020239762A AU2020239762A AU2020239762A1 AU 2020239762 A1 AU2020239762 A1 AU 2020239762A1 AU 2020239762 A AU2020239762 A AU 2020239762A AU 2020239762 A AU2020239762 A AU 2020239762A AU 2020239762 A1 AU2020239762 A1 AU 2020239762A1
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- Prior art keywords
- pulse current
- gis
- flange bolt
- current sensor
- measuring device
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
- G01R15/181—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers using coils without a magnetic core, e.g. Rogowski coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
Abstract
The present invention relates to a device for detecting a partial discharge (PD) of a gas
insulated switchgear (GIS) based on a flange bolt. The device includes a GIS, a pulse current
sensor connected to the GIS and a measuring device connected to the pulse current sensor. The
GIS includes a plurality of GIS shells connected with each other, flanges at both ends of the GIS
shell, a flange bolt, gaskets, nuts, and a pot-shaped insulator and a bus guide rod which are
provided inside the GIS shell and connected to each other. The GIS shell and the pot-shaped
insulator are connected to each other through the flange and the flange bolt. The gasket and the
nut each are provided on both ends of the flange bolt. The pulse current sensor is provided on a
side of the flange through the flange bolt. The GIS shells, the flanges, the nuts, the gaskets, the
flange bolt and a metal housing of the pulse current sensor form a pulse current flow path. The
pulse current flow path passes through the pulse current sensor. Compared with the prior art, the
present invention is suitable for a multi-point grounded GIS.
Description
[0001] The present invention relates to the field of partial discharge (PD) detection of gas insulated switchgears (GIS), in particular to a device and method for detecting a PD of a GIS based on a flange bolt.
[0002] Gas insulated switchgear (GIS) is a piece of high-voltage electrical equipment with high operational reliability, a small maintenance workload and a long overhaul period. At present, GIS is widely used in the power system, and its effective maintenance and safe operation are very important for the power system.
[0003] GIS includes functional units such as buses, circuit breakers, isolating switches, grounding switches, current transformers, voltage transformers and lightning arresters. GIS uses SF 6 with a high insulation strength as the insulating medium and the arc extinguishing medium of the circuit breaker, which seals all high-voltage components in the shell to realize the compactness of the GIS. However, SF leakage, external moisture infiltration, conductive impurities and aging of insulators, etc. may cause internal flashover failures, resulting in reduced insulation properties of the GIS.
[0004] Operating experience has shown that GIS faults caused by reduced insulation properties account for a large proportion. In order to prevent the system from malfunctioning due to reduced insulation properties, in actual operation, it is necessary to conduct insulation detection on the GIS and monitor the internal insulation status of the GIS in real time. Various potential defects in the GIS may cause partial discharges (PDs) of varying degrees, and long-term discharges will cause degradation of the insulation properties. When the PD gradually expands, entire insulation breakdown or surface flashover may occur, affecting the safe operation of the equipment, and even leading to operating failures that may cause the system to power out and cause huge losses.
[0005] At present, in the power industry, the GIS tests are mainly aimed at discovering the internal insulation defects of GIS. Among them, the alternating current (AC) withstand voltage test (pre-delivery or on-site test) is designed to detect the PD pulse current of the GIS off line. The PD inside the GIS will generate a pulse current signal. The pulse current method is currently the only PD detection method with international and national standards. The detection method obtains the pulse current at the coupling capacitor side through impedance measurement or obtains the pulse current at the neutral point or ground point of the power equipment through a
Rogowski coil. In this way, the discharge amount, discharge phase, discharge frequency and other information of the pulse current are obtained. The detection method is shown in FIG. 1. Before the GIS is installed and put into operation in the laboratory or on site, a coupling capacitive voltage divider is built, and the GIS is grounded at a single point, so that the PD pulse current signal is coupled from the ground line. However, the method shown in FIG. 1 is not suitable to detect the PD pulse current of most GIS running on line and multi-point grounded on site.
[0006] In order to overcome the above defects existing in the prior art, an objective of the present invention is to provide a device and method for detecting a partial discharge (PD) of a gas insulated switchgear (GIS) based on a flange bolt.
[0007] The purpose of the present invention is achieved by the following technical solutions.
[0008] A device for detecting a partial discharge (PD) of a gas insulated switchgear (GIS) based on a flange bolt, including a GIS, a pulse current sensor connected to the GIS and a measuring device connected to the pulse current sensor, where the GIS includes a plurality of GIS shells connected with each other, flanges at both ends of the GIS shell, a flange bolt, gaskets, nuts, and a pot-shaped insulator and a bus guide rod which are provided inside the GIS shell and connected to each other; the GIS shell and the pot-shaped insulator are connected to each other through the flange and the flange bolt; the gasket and the nut each are provided on both ends of the flange bolt; the pulse current sensor is provided on a side of the flange through the flange bolt; the GIS shells, the flanges, the nuts, the gaskets, the flange bolt and a metal housing of the pulse current sensor form a pulse current flow path; the pulse current flow path passes through the pulse current sensor.
[0009] Preferably, the gasket is provided between the nut and an outer surface of the flange; the pulse current sensor is provided between the outer surface of the flange and the gasket.
[0010] Preferably, the pulse current flow path first passes through the GIS shell, the flange, the gasket and the nut which are on one side of the flange bolt in sequence, and then passes through the flange bolt; then the pulse current flow path further passes through the nut, the gasket, the metal housing of the pulse current sensor and the GIS shell which are on the other side of the flange bolt in sequence; when a PD occurs inside the GIS and a pulse current signal is generated on the GIS shell, the pulse current signal flows along the pulse current flow path, from the GIS shell on said one side of the flange bolt to the GIS shell on said other side of the flange bolt.
[0011] Preferably, when the pulse current signal flows along the pulse current flow path from one end of the flange bolt to the other end thereof, the pulse current signal passes through the pulse current sensor, and the pulse current sensor converts the pulse current signal into a voltage signal.
[0012] Preferably, there is only one pulse current sensor provided on said other side of the flange bolt.
[0013] Preferably, the pulse current sensor is a Rogowski coil which is a high-frequency current transformer (HFCT); when a detection frequency band is less than 1 M, the pulse current sensor adopts a conventional pulse current method; when the detection frequency band is 3-30 MHz, the pulse current sensor adopts a high-frequency pulse current method.
[0014] Preferably, the measuring device is a live detection device or an online monitoring device; when the measuring device is a live detection device, the measuring device is used to detect the GIS; during the detection, the measuring device is connected to the pulse current sensor, and after the detection is completed, the measuring device is disconnected from the pulse current sensor; when the measuring device is an online monitoring device, the measuring device is used to monitor the GIS on line, and the measuring device is always connected to the pulse current sensor.
[0015] Amethod for detecting a PD of a GIS by using the above device for detecting a PD of a GIS based on a flange bolt includes the following steps:
[0016] 1) generating a pulse current signal on a GIS shell by aPD inside the GIS;
[0017] 2) allowing the pulse current signal to flow along a pulse current flow path, from the GIS shell on one side of a flange bolt to a GIS shell on the other side of the flange bolt, and simultaneously flow through a pulse current sensor to convert the pulse current signal into a voltage signal;
[0018] 3) transmitting the voltage signal to a measuring device; and
[0019] 4) enabling the measuring device to measure a parameter of the received voltage signal, and to detect the internal PD of the GIS according to the parameter of the voltage signal.
[0020] Preferably, the pulse current sensor is a Rogowski coil which is a high-frequency current transformer (HFCT); when a detection frequency band is less than 1 M, the pulse current sensor adopts a conventional pulse current method; when the detection frequency band is 3-30 MHz, the pulse current sensor adopts a high-frequency pulse current method.
[0021] Preferably, the measuring device is a live detection device or an online monitoring device; when the measuring device is a live detection device, the method is used to detect the GIS; during the detection, the measuring device receives a parameter of the voltage signal and measures; when the measuring device is an online monitoring device, the method is used to monitor the GIS on line, and the measuring device receives the voltage signal in real time and measures during the normal operation of the GIS.
[0022] Compared with the prior art, the present invention has the following advantages:
[0023] 1) In a multi-point grounded GIS, flanges of two shells connected in series are not insulated with each other, but are conducted through a fixing bolt. Based on this, the present invention provides a pulse current sensor between a flange and a gasket, and uses a pulse current flow path formed at the connection of the flanges of the two GIS shells to directly measure the pulse current. The present invention realizes the on-site detection of the PD pulse current of the GIS that is grounded at multiple points and operated on line in the substation.
[0024] 2) The present invention uses a Rogowski coil (HFCT) as the pulse current sensor, which is conveniently installed outside the flange bolt. The installation follows the existing operation and maintenance guidelines, without damaging the original sealing structure and internal insulation design of the GIS.
[0025] 3) The present invention uses a measuring device that can be a live detection device or an online monitoring device. When the measuring device is an online detection device, the connection between a coaxial cable and the pulse current sensor is maintained, and the pulse current signal on the pulse current flow path in the GIS is monitored in real time. This does not affect the normal operation of the GIS, and improves the adaptability and practicability of the device of the present invention.
[0026] FIG. 1 is a schematic diagram of an existing method for detecting a partial discharge (PD) pulse current of an offline gas insulated switchgear (GIS).
[0027] FIG. 2 is a schematic diagram of a device for detecting a PD of a GIS based on a flange bolt according to the present invention.
[0028] FIG. 3 shows a single pulse current waveform acquired by using a method for detecting a PD of a GIS based on a flange bot according to the present invention, where the single pulse current waveform is generated by a PD caused by a burr defect at a tip of a GIS guide rod.
[0029] FIG. 4 shows a phase-resolved partial discharge (PRPD) acquired by using the method for detecting a PD of a GIS based on a flange bot according to the present invention, where the PRPD is generated by the PD caused by the burr defect at the tip of the GIS guide rod.
[0030] Reference Numerals: 1. pulse current sensor (Rogowski coil or high-frequency current transformer (HFCT)); 2. gasket; 3. nut; 4. flange bolt; 5. GIS shell; 6. pulse current flow path; 7. pot-shaped insulator; 8. bus guide rod; 9. coaxial cable; 10. measuring device; 11. flange; 20. gas insulated switchgear (GIS); 30. high-voltage power supply; and 40. Rogowski coil or high-frequency current transformer (HFCT).
[0031] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] Embodiment 1
[0033] The present invention provides a device for detecting a partial discharge (PD) of a gas insulated switchgear (GIS) based on a flange bolt. As shown in FIG. 2, the device includes flanges 11, pulse current sensors 1, gaskets 2, nuts 3, a flange bolt 4, GIS shells 5, a pot-shaped insulator 7, a bus guide rod 8, a coaxial cable 9 and a measuring device 10. The GIS shells 5, the flanges 11, the nuts 3, the gaskets 2 and the flange bolt 4 together form a pulse current flow path 6. In this embodiment, the pulse current sensor 1 may use a Rogowski coil which is a high-frequency current transformer (HFCT). The specific location and connection of each component are described below.
[0034] The GIS shells 5 are connected in series, and the flanges 11 are respectively provided at two ends of the GIS shells 5. Referring to FIG. 2, the GIS shells 5 provided on the left and right are connected in series with each other through two flange bolts 4. The pot-shaped insulator 7 and the bus guide rod 8 are provided in the GIS shell 5 and connected to each other. The pot-shaped insulator 7 is connected to the GIS shell 5 through the flange 11 and the flange bolt 4. The gasket 2 and the nut 3 each are provided at two ends of the flange bolt 4 to ensure the sealing performance of the GIS. In this way, a GIS is formed. The pulse current sensor 1 (Rogowski coil or HFCT) is provided on an outer side of the flange 11 through the flange bolt 4. Then the flanges 11, the gasket 2, the pulse current sensor 1 and the nut 3 have the following positional relationship: the gasket 2 is provided between the nut 3 and the flange 11, and the pulse current sensor 1 is provided between the gasket 2 and the flange 11. The GIS shells 5, the flanges 11, the nuts 3, the gaskets 2, a metal housing of the pulse current sensor 1 and the flange bolt 4 form a pulse current flow path 6 to pass through the pulse current sensor 1. The pulse current sensor 1 is connected to the measuring device 10 via the coaxial cable 9.
[0035] In this embodiment, referring to FIG. 2, only one pulse current sensor 1 is provided at one end of one flange bolt 4.
[0036] The pulse current flow path 6 first passes through the GIS shell 5, the flange 11, the gasket 2 and the nut 3 on one side of the flange bolt 4 in sequence, and then passes through this side of the flange bolt 4. Then the pulse current flow path first passes through the other side of the flange bolt 4, and then sequentially passes through the following components on this side of the flange bolt 4: the nut 3, the gasket 2, the metal housing of the pulse current sensor 1 and the GIS shell 5. When a PD occurs inside the GIS and a pulse current signal is generated on the GIS shell 5, the pulse current signal flows along the pulse current flow path 6, from the GIS shell 5 on said one side of the flange bolt 4 to the GIS shell 5 on said other side of the flange bolt 4. When the pulse current signal flows along the pulse current flow path 6 from one side of the flange bolt 4 to the other side thereof, the pulse current signal passes through the pulse current sensor 1, and the pulse current sensor 1 converts the pulse current signal into a voltage signal.
[0037] The operating characteristics of the pulse current sensor 1 meet the requirements of a PD pulse current method. When a detection frequency band is less than 1 M, a conventional pulse current method is adopted. When the detection frequency band is 3-30 MHz, a high-frequency pulse current method is adopted. The dimensional parameters of the pulse current sensor 1 are matched with the dimensions of the gaskets 2, the nuts 3 and the bolt.
[0038] Single-point grounding is to insulate one end of each GIS shell 5 and ground the other end at a single point. Generally, in structure, two GIS shells 5 connected in series are insulated with each other at the flange, and are insulated with the ground at a shell support. Multi-point grounding is to use multi-point (more than two points) grounding conductors in each GIS shell 5 to connect the GIS shell 5 and the ground. Generally, in structure, the shell supports are not insulated, and the flanges of the two GIS shells 5 connected in series are not insulated, but are conducted by a fixing bolt.
[0039] The main principle of the present invention is that the PD generated due to defects in the GIS generates a weak pulse current signal on the GIS shell 5 through a capacitance between the bus guide rod 8 and the GIS shell 5. The pulse current signal first passes through the GIS shell 5, the flange 11, the gasket 2 and the nut 3 on one side of the flange bolt 4 in sequence, and then passes through the flange bolt 4. Then, the pulse current signal further passes through the nut 3 and the gasket 2 on the other side of the flange bolt 4 in sequence, and finally flows to the GIS shell 5 on the other side of the flange bolt 4, thereby forming a path. The pulse current sensor 1 on the flange bolt 4 converts the pulse current signal into a voltage signal, and the voltage signal is transmitted to the measuring device 10. In this way, the present invention provides a live detection and online monitoring method for the PD pulse current of the GIS based on the flange bolt 4.
[0040] The present invention further provides a method for detecting a PD of a GIS based on a flange bolt, including the following steps:
[0041] 1) Generate a pulse current signal on a GIS shell 5 by aPD inside the GIS.
[0042] 2) Allow the pulse current signal to flow along a pulse current flow path 6, from the GIS shell 5 on one side of a flange bolt 4 to a GIS shell 5 on the other side of the flange bolt 4, and simultaneously flow through a pulse current sensor 1 to convert the pulse current signal into a voltage signal.
[0043] 3) Transmit the voltage signal to a measuring device 10 through a coaxial cable 9.
[0044] 4) Enable the measuring device 10 to measure a parameter of the received voltage signal, and to detect the internal PD of the GIS according to the parameter of the voltage signal.
[0045] FIG. 3 shows a single pulse current waveform acquired by using the method of the present invention, where the single pulse current waveform is generated by a PD caused by a burr defect at a tip of the GIS guide rod. FIG. 4 shows a phase-resolved partial discharge (PRPD) acquired by using the method of the present invention, where the PRPD is generated by the PD caused by the burr defect at the tip of the GIS guide rod.
[0046] In this embodiment, the measuring device 10 is a live detection device, which is used for detecting the PD pulse current signal of the GIS. During the detection, the measuring instrument 10 is connected to the pulse current sensor 1 through the coaxial cable 9 to acquire a voltage signal converted from the pulse current signal by the pulse current sensor 1. At the end of the work, the coaxial cable 9 is disconnected from the pulse current sensor 1.
[0047] Embodiment 2
[0048] In this embodiment, the measuring device 10 is an online monitoring device for monitoring the PD pulse current signal of the GIS. The measuring device 10 is always connected to the pulse current sensor 1 through the coaxial cable 9 to monitor the voltage signal converted from the pulse current signal by the pulse current sensor 1 in real time.
[0049] The above described are merely specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art may easily conceive of various equivalent modifications or replacements within the technical scope disclosed in the present invention, but these equivalent modifications or replacements should fall within the protection scope of the present invention. Therefore, the protection scope of the disclosure should be subject to the protection scope of the claims.
Claims (10)
- CLAIMS: 1. A device for detecting a partial discharge (PD) of a gas insulated switchgear (GIS) based on a flange bolt, comprising a GIS, a pulse current sensor (1) connected to the GIS and a measuring device (10) connected to the pulse current sensor (1); wherein the GIS comprises a plurality of GIS shells (5) connected with each other, flanges (11) at both ends of the GIS shell (5), a flange bolt (4), gaskets (2), nuts (3), and a pot-shaped insulator (7) and a bus guide rod (8) which are provided inside the GIS shell (5) and connected to each other; the GIS shell (5) and the pot-shaped insulator (7) are connected to each other through the flange (11) and the flange bolt (4); the gasket (2) and the nut (3) each are provided on both ends of the flange bolt (4); the pulse current sensor (1) is provided on a side of the flange (11) through the flange bolt (4); the GIS shells (5), the flanges (11), the nuts (3), the gaskets (2), the flange bolt (4) and a metal housing of the pulse current sensor (1) form a pulse current flow path (6); the pulse current flow path (6) passes through the pulse current sensor (1).
- 2. The device for detecting a PD of a GIS based on a flange bolt according to claim 1, wherein the gasket (2) is provided between the nut (3) and an outer surface of the flange (11); the pulse current sensor (1) is provided between the outer surface of the flange (11) and the gasket (2).
- 3. The device for detecting a PD of a GIS based on a flange bolt according to claim 2, wherein the pulse current flow path (6) first passes through the GIS shell (5), the flange (11), the gasket (2) and the nut (3) which are on one side of the flange bolt (4) in sequence, and then passes through the flange bolt (4); then the pulse current flow path further passes through the nut (3), the gasket (2), the metal housing of the pulse current sensor (1) and the GIS shell (5) which are on the other side of the flange bolt (4) in sequence; when a PD occurs inside the GIS and a pulse current signal is generated on the GIS shell (5), the pulse current signal flows along the pulse current flow path (6), from the GIS shell (5) on said one side of the flange bolt (4) to the GIS shell (5) on said other side of the flange bolt (4).
- 4. The device for detecting a PD of a GIS based on a flange bolt according to claim 3, wherein when the pulse current signal flows along the pulse current flow path (6) from one end of the flange bolt (4) to the other end thereof, the pulse current signal passes through the pulse current sensor (1), and the pulse current sensor (1) converts the pulse current signal into a voltage signal.
- 5. The device for detecting a PD of a GIS based on a flange bolt according to claim 4, wherein there is only one pulse current sensor (1) provided on said other side of the flange bolt (4).
- 6. The device for detecting a PD of a GIS based on a flange bolt according to claim 5, wherein the pulse current sensor (1) is a Rogowski coil which is a high-frequency current transformer (HFCT); when a detection frequency band is less than 1 M, the pulse current sensor (1) adopts a conventional pulse current method; when the detection frequency band is 3-30 MHz, the pulse current sensor (1) adopts a high-frequency pulse current method.
- 7. The device for detecting a PD of a GIS based on a flange bolt according to claim 1, wherein the measuring device (10) is a live detection device or an online monitoring device; when the measuring device (10) is a live detection device, the measuring device is used to detect the GIS; during the detection, the measuring device (10) is connected to the pulse current sensor (1), and after the detection is completed, the measuring device (10) is disconnected from the pulse current sensor (1); when the measuring device (10) is an online monitoring device, the measuring device is used to monitor the GIS on line, and the measuring device (10) is always connected to the pulse current sensor (1).
- 8. A method for detecting a PD of a GIS by using the device for detecting a PD of a GIS based on a flange bolt according to claim 4, comprising the following steps: 1) generating a pulse current signal on a GIS shell (5) by a PD inside the GIS; 2) allowing the pulse current signal to flow along a pulse current flow path (6), from the GIS shell (5) on one side of a flange bolt (4) to a GIS shell (5) on the other side of the flange bolt (4), and simultaneously flow through a pulse current sensor (1) to convert the pulse current signal into a voltage signal; 3) transmitting the voltage signal to a measuring device (10); and 4) enabling the measuring device (10) to measure a parameter of the received voltage signal, and to detect the internal PD of the GIS according to the parameter of the voltage signal.
- 9. The method for detecting a PD of a GIS based on a flange bolt according to claim 8, wherein the pulse current sensor (1) is a Rogowski coil which is a high-frequency current transformer (HFCT); when a detection frequency band is less than 1 M, the pulse current sensor (1) adopts a conventional pulse current method; when the detection frequency band is 3-30 MHz, the pulse current sensor (1) adopts a high-frequency pulse current method.
- 10. The method for detecting a PD of a GIS based on a flange bolt according to claim 8, wherein the measuring device (10) is a live detection device or an online monitoring device; when the measuring device (10) is a live detection device, the method is used to detect the GIS; during the detection, the measuring device (10) receives a parameter of the voltage signal and measures; when the measuring device (10) is an online monitoring device, the method is used to monitor the GIS on line, and the measuring device (10) receives the voltage signal in real time and measures during the normal operation of the GIS.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910872790.5A CN110426616A (en) | 2019-09-16 | 2019-09-16 | A kind of GIS partial discharge detection device and method based on flange plate bolt |
| CN201910872790.5 | 2019-09-16 | ||
| PCT/CN2020/106428 WO2021052036A1 (en) | 2019-09-16 | 2020-07-31 | Gis partial discharge detecting device and method based on flange bolts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2020239762A1 true AU2020239762A1 (en) | 2021-04-01 |
Family
ID=68418173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2020239762A Abandoned AU2020239762A1 (en) | 2019-09-16 | 2020-07-31 | Device and method for detecting partial discharge of gas insulated switchgear based on flange bolt |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN110426616A (en) |
| AU (1) | AU2020239762A1 (en) |
| WO (1) | WO2021052036A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426616A (en) * | 2019-09-16 | 2019-11-08 | 国网上海市电力公司 | A kind of GIS partial discharge detection device and method based on flange plate bolt |
| CN112710934A (en) * | 2021-01-22 | 2021-04-27 | 杭州西湖电子研究所 | Partial discharge detection method for gas-insulated metal-enclosed switch cabinet |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3493970B2 (en) * | 1997-09-22 | 2004-02-03 | 株式会社日立製作所 | Bushing monitoring device and its monitoring method |
| CN102736003A (en) * | 2012-07-09 | 2012-10-17 | 广州供电局有限公司 | Portable partial discharge pulse current sensor |
| CN203811754U (en) * | 2014-02-24 | 2014-09-03 | 大连电力勘察设计院有限公司 | An enclosed type gas insulation combined electric appliance partial discharge detection device |
| CN105334433B (en) * | 2014-08-07 | 2018-08-07 | 国家电网公司 | The detection method and device of cable local discharge |
| CN104330713A (en) * | 2014-11-04 | 2015-02-04 | 日新电机（无锡）有限公司 | Partial discharge detecting structure for realizing high-voltage power capacitor |
| CN204989404U (en) * | 2015-09-22 | 2016-01-20 | 袁孝红 | Cable partial discharge on -line monitoring system |
| CN107688139A (en) * | 2017-09-22 | 2018-02-13 | 福州大学 | GIS disc insulator creeping discharge monitoring methods based on Leakage Current |
| CN107807316A (en) * | 2017-11-27 | 2018-03-16 | 清华四川能源互联网研究院 | Local discharge detection device and system |
| CN108318788A (en) * | 2018-02-01 | 2018-07-24 | 清华大学 | A kind of GIS disc insulators local discharge detection device |
| CN108152694A (en) * | 2018-02-01 | 2018-06-12 | 清华大学 | A kind of GIS disc insulators detection method for local discharge |
| CN110426616A (en) * | 2019-09-16 | 2019-11-08 | 国网上海市电力公司 | A kind of GIS partial discharge detection device and method based on flange plate bolt |
| CN210720633U (en) * | 2019-09-16 | 2020-06-09 | 国网上海市电力公司 | GIS partial discharge detection device based on flange bolt |
-
2019
- 2019-09-16 CN CN201910872790.5A patent/CN110426616A/en active Pending
-
2020
- 2020-07-31 WO PCT/CN2020/106428 patent/WO2021052036A1/en active Application Filing
- 2020-07-31 AU AU2020239762A patent/AU2020239762A1/en not_active Abandoned
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| Publication number | Publication date |
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| WO2021052036A1 (en) | 2021-03-25 |
| CN110426616A (en) | 2019-11-08 |
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