CN111337796A - Power transmission line lightning shielding failure model test platform and method considering mountain terrain - Google Patents
Power transmission line lightning shielding failure model test platform and method considering mountain terrain Download PDFInfo
- Publication number
- CN111337796A CN111337796A CN201811555402.2A CN201811555402A CN111337796A CN 111337796 A CN111337796 A CN 111337796A CN 201811555402 A CN201811555402 A CN 201811555402A CN 111337796 A CN111337796 A CN 111337796A
- Authority
- CN
- China
- Prior art keywords
- model
- voltage
- power transmission
- scaling
- transmission line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to an electric power test technology, in particular to a power transmission line lightning shielding failure model test platform and method considering mountain terrain. The test platform comprises a physical model, a lead pressurization loop, an impact test loop and an observation system; the physical model is a line model which reduces an actual line according to a uniform scaling ratio and a slope model with a certain size, the lead pressurizing loop provides direct current potential for the line model, the impact test loop simulates the natural lightning stroke discharge and finally jumps to a downlink pilot, and the observation system is used for acquiring a test voltage waveform and observing a discharge path. The test platform is provided with the power transmission line lightning shielding failure model test platform aiming at the mountainous terrain, provides an effective means for the research of the lightning shielding failure discharge characteristic of the power transmission line in the mountainous environment, and has important significance for the research of the power transmission line lightning shielding failure model test.
Description
Technical Field
The invention belongs to the technical field of electric power tests, and particularly relates to a power transmission line lightning shielding failure model test platform and method considering mountain terrain.
Background
With the development and construction of the ultra-high voltage transmission line, the transmission line is longer and longer, the passing terrain is complex, the complex terrain can cause great influence on the lightning shielding characteristic of the transmission line, among a plurality of factors causing stable operation of the line, the lightning stroke fault is the main factor causing the operation fault of the line, and the lightning shielding failure occupies the main position. Therefore, in order to ensure safe and stable operation of power transmission engineering, research on lightning shielding characteristics and lightning protection technology of the power transmission engineering is necessary.
The research on the characteristics of the lightning winder of the power transmission line is mostly focused on engineering calculation and scaling model tests. The current scaling model test mainly aims at the research of the shielding failure special effect of the power transmission line under the condition of flat ground, so that a system for the lightning shielding failure model test of the power transmission line aiming at mountain terrain is lacked.
Disclosure of Invention
The invention aims to provide a platform for researching the lightning shielding failure discharge characteristics of a power transmission line in a mountain environment.
In order to achieve the purpose, the invention adopts the technical scheme that the power transmission line lightning shielding failure model test platform considering mountain terrain comprises a physical model, a lead pressurizing loop, an impact test loop and an observation system; the physical model is a line model which reduces an actual line according to a uniform scaling ratio and a slope model with a certain size, the lead pressurizing loop provides direct current potential for the line model, the impact test loop simulates the natural lightning stroke discharge and finally jumps to a downlink pilot, and the observation system is used for acquiring a test voltage waveform and observing a discharge path.
In the power transmission line lightning shielding failure model test platform considering the mountain terrain, the physical model comprises a scaling model tower, an insulator model, a scaling lead, a lightning conductor and a slope model; the scaling wire is suspended on the scaling model tower through the insulator model; the lightning conductor is suspended at a suspension point at the top of the scaled model tower and is directly grounded through the scaled model tower; the slope model and the scaling wire are placed in parallel and kept grounded.
In the power transmission line lightning shielding failure model test platform considering the mountain terrain, a scaling model tower, an insulator model, a scaling lead and a lightning conductor are all models established after the actual tower line is scaled down according to the same scaling proportion; the scaling model tower is built by angle steel, the insulator model is replaced by epoxy resin rods with equal length and is a V-shaped string, the scaling wire is an eight-split wire made of copper wires, and the lightning conductor is made of iron wire materials; and the bottom of the scaling model tower is raised to ensure that the vertical ground distance of the lead under the mountain terrain is consistent with that under the plain condition.
In the power transmission line lightning shielding failure model test platform considering the mountain landform, the lead pressurization loop is connected with the scaling lead to provide a high-voltage potential for the lead; the device comprises a voltage regulator, a boosting transformer, a high-voltage silicon stack, a filter capacitor, a protection resistor and a protection gap; the voltage regulator is connected with the step-up transformer and is used for regulating the applied voltage; one end of the high-voltage silicon stack is connected with the high-voltage end of the boosting transformer, and the other end of the high-voltage silicon stack is connected with the filter capacitor; the other end of the filter capacitor is grounded, and the high-voltage silicon stack is matched with the filter capacitor for rectification; one end of the protection resistor is connected with the high-voltage silicon stack, and the other end of the protection resistor is connected with the scaling wire to play a role in current limiting protection; one end of the protection gap is connected with the protection resistor, and the other end of the protection gap is grounded.
In the above power transmission line lightning shielding failure model test platform considering mountain terrain, the impulse test loop comprises an impulse voltage generator, a high-voltage lead and a high-voltage rod electrode, and the impulse voltage generator generates impulse voltage which is applied to the air gap through the high-voltage lead and the high-voltage rod electrode.
In the power transmission line lightning shielding failure model test platform considering the mountain terrain, the observation system comprises a resistance-capacitance voltage divider, an oscilloscope, a coaxial cable, a static camera and a high-speed camera, wherein the resistance-capacitance voltage divider is connected with the impulse voltage generator in parallel and is used for acquiring impulse voltage waveform; the oscilloscope is connected with the resistance-capacitance voltage divider through a coaxial cable and is used for recording impulse voltage waveform; the static camera is used for observing a discharge path; a high-speed camera is used to observe the discharge development process.
A method for selecting the size of a slope model for simulating a hillside comprises the following steps:
step 1, analyzing electrostatic field distribution characteristics of a rod-slope air gap by adopting a finite element calculation method;
and 3, selecting a hillside model with electric field distribution close to that of a large-size sloping field according to the space requirement of the test field.
The invention has the beneficial effects that: the test platform is provided with the power transmission line lightning shielding failure model test platform aiming at the mountainous terrain, provides an effective means for the research of the lightning shielding failure discharge characteristic of the power transmission line in the mountainous environment, and has important significance for the research of the power transmission line lightning shielding failure model test.
Drawings
FIG. 1 is a flow chart of a simulated hill model size selection method according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
wherein, 1-physical model, 101-scale model tower, 102-insulator model, 103-scale lead, 104-lightning conductor, 105-slope model; 2-lead pressurization loop, 201-voltage regulator, 202-step up transformer, 203-high voltage silicon stack, 204-filter capacitor, 205-protection resistor, 206-protection gap; 3-impulse test loop, 301-impulse voltage generator, 302-high voltage lead, 303-high voltage rod electrode; 4-observation system, 401-resistance-capacitance voltage divider, 402-oscilloscope, 403-coaxial cable, 404-static camera, 405-high-speed camera.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The embodiment is realized by adopting the following technical scheme that as shown in fig. 1, a slope model size selection method for simulating a hillside selects the size of a sloping field model by calculating spatial electrostatic field distribution. The method comprises the following specific steps:
and analyzing the electrostatic field distribution characteristic of the rod-slope air gap by adopting a finite element calculation method, and selecting simulation calculation parameters according to the requirement of a test space. And analyzing the influence of the size of the spatial slope on the spatial electric field distribution, and comparing and analyzing the potentials from the head of the electrode to each point on the center of the slope. Selecting the slope surface with the size which is suitable for the test space and the difference between the potential of each point and the potential of the large-size slope land is close. This ensures that the size of the ramp in the test should be large enough to eliminate the effect of its edge on the discharge process.
As shown in fig. 2, the power transmission line lightning shielding failure model test platform considering mountain terrain comprises a physical model 1, a lead pressurizing loop 2, an impact test loop 3 and an observation system 4. The physical model 1 comprises a line model established by reducing an actual line according to a uniform scaling ratio and a slope model with a certain size; the lead pressurization loop 2 provides direct current potential for the model lead through a rectification circuit; the impact test loop 3 simulates the natural lightning strike discharge and finally jumps down guide by a high-voltage rod electrode 303 and an impact voltage generator 301; the observation system 4 acquires a test voltage waveform through the resistance-capacitance voltage divider 401 and the oscilloscope 402, and observes a discharge path through the still camera 404 and the high-speed camera 405.
Further, the physical model 1 includes a scaled model tower 101, an insulator model 102, a scaled wire 103, a lightning conductor 104, and a slope model 105. A scaling wire 103 is suspended on a scaling model tower 101 through an insulator model 102; the lightning conductor 104 is suspended at a suspension point at the top of the scaled model tower 101 and is directly grounded through the scaled model tower 101; the ramp model 105 is placed in parallel with the scaling wire 103, maintaining good grounding.
Moreover, the scaling model tower 101, the insulator model 102, the scaling lead wire 103 and the lightning conductor 104 are models which are established after actual tower lines are scaled down according to the same scaling proportion, and the scaling model tower 101 is built by angle steel; the insulator model 102 is replaced by an epoxy resin rod with equal length and is a V-string; the scaled conductor 103 is an eight-split conductor made of copper wires; the lightning conductor 104 is made of iron wire. It should be noted that, compared with the normal tower type, the scaled model tower 101 needs to be raised at the bottom to ensure that the vertical ground distance of the wire under the mountain terrain is consistent with that under the plain condition.
Furthermore, the wire pressure circuit 2 is connected to the scaled wire 103 to provide a high voltage potential to the wire. The circuit comprises a voltage regulator 201, a step-up transformer 202, a high-voltage silicon stack 203, a filter capacitor 204, a protection resistor 205 and a protection gap 206. The voltage regulator 201 and the step-up transformer 202 are used for regulating the applied voltage; one end of the high-voltage silicon stack 203 is connected with the high-voltage end of the booster transformer 202, and the other end of the high-voltage silicon stack is connected with the filter capacitor 204; the other end of the filter capacitor 204 is grounded, and the high-voltage silicon stack 203 is matched with the filter capacitor 204 for rectification; one end of the protective resistor 205 is connected with the high-voltage silicon stack 203, and the other end is connected with the scaling wire 103 to play a role in current limiting protection; the protection gap 206 is connected in parallel to a circuit, and when shock waves hit the power transmission line in the test process, current can leak through the protection gap 206 and enter the ground, so that the protection effect is achieved.
The impulse test circuit 3 comprises an impulse voltage generator 301, a high-voltage lead 302 and a high-voltage rod electrode 303, wherein the impulse voltage generator 301 generates impulse voltage which is applied to an air gap through the high-voltage lead and the high-voltage rod electrode 303 and is used for simulating a descending leader of the final jump of natural lightning strike discharge.
Further, the observation system 4 includes a resistive-capacitive voltage divider 401, an oscilloscope 402, a coaxial cable 403, a still camera 404, and a high-speed camera 405. The RC voltage divider 401 is used for acquiring a surge voltage waveform; the oscilloscope 402 is connected with the resistor-capacitor voltage divider 401 through a coaxial cable 403 and is used for recording impulse voltage waveform; a still camera 404 for observing the discharge path; a high speed camera 405 is used to observe the discharge development process. The still camera 404 may employ a single lens reflex camera.
In specific implementation, at the beginning of a test, the voltage is regulated by the voltage regulator 201, and a direct current potential required by the test is applied to the scaling wire 103 at the tail end of the wire pressurization loop 2 through the step-up transformer 202, the high-voltage silicon stack 203, the filter capacitor 204 and the protection resistor 205. The surge voltage generator 301 applies a surge voltage to the high-voltage rod electrode 303 through the high-voltage lead 302, so that the air gap between the high-voltage rod electrode 303 and the scaling wire 103 is broken down, and the discharge process is finished. In the discharging process, the impulse voltage waveform is attenuated by the resistance-capacitance voltage divider 401 and then collected by the oscilloscope 402; meanwhile, the discharge path and the discharge development process are recorded by a still camera 404 and a high-speed camera 405.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
Although specific embodiments of the present invention have been described above with reference to the accompanying drawings, it will be appreciated by those skilled in the art that these are merely illustrative and that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is only limited by the appended claims.
Claims (7)
1. A power transmission line lightning shielding failure model test platform considering mountain terrain is characterized by comprising a physical model, a lead pressurization loop, an impact test loop and an observation system; the physical model is a line model which reduces an actual line according to a uniform scaling ratio and a slope model with a certain size, the lead pressurizing loop provides direct current potential for the line model, the impact test loop simulates the natural lightning stroke discharge and finally jumps to a downlink pilot, and the observation system is used for acquiring a test voltage waveform and observing a discharge path.
2. The power transmission line lightning shielding failure model test platform considering mountainous terrain as claimed in claim 1, wherein the physical model comprises a scaled model tower, an insulator model, a scaled wire, a lightning conductor and a slope model; the scaling wire is suspended on the scaling model tower through the insulator model; the lightning conductor is suspended at a suspension point at the top of the scaled model tower and is directly grounded through the scaled model tower; the slope model and the scaling wire are placed in parallel and kept grounded.
3. The power transmission line lightning shielding failure model test platform considering mountainous terrain as claimed in claim 2, wherein the scaling model tower, the insulator model, the scaling wire and the lightning conductor are models which are established after the actual tower line is scaled down according to the same scaling proportion; the scaling model tower is built by angle steel, the insulator model is replaced by epoxy resin rods with equal length and is a V-shaped string, the scaling wire is an eight-split wire made of copper wires, and the lightning conductor is made of iron wire materials; and the bottom of the scaling model tower is raised to ensure that the vertical ground distance of the lead under the mountain terrain is consistent with that under the plain condition.
4. The power transmission line lightning shielding failure model test platform considering mountainous terrain as claimed in claim 1, wherein the lead pressurization loop is connected with the scaling lead to provide high-voltage potential for the lead; the device comprises a voltage regulator, a boosting transformer, a high-voltage silicon stack, a filter capacitor, a protection resistor and a protection gap; the voltage regulator is connected with the step-up transformer and is used for regulating the applied voltage; one end of the high-voltage silicon stack is connected with the high-voltage end of the boosting transformer, and the other end of the high-voltage silicon stack is connected with the filter capacitor; the other end of the filter capacitor is grounded, and the high-voltage silicon stack is matched with the filter capacitor for rectification; one end of the protection resistor is connected with the high-voltage silicon stack, and the other end of the protection resistor is connected with the scaling wire to play a role in current limiting protection; one end of the protection gap is connected with the protection resistor, and the other end of the protection gap is grounded.
5. The power transmission line lightning shielding failure model test platform considering mountainous terrain as claimed in claim 1, wherein the impulse test loop comprises an impulse voltage generator, a high-voltage lead wire and a high-voltage rod electrode, and the impulse voltage generator generates impulse voltage which is applied to the air gap through the high-voltage lead wire and the high-voltage rod electrode.
6. The power transmission line lightning shielding failure model test platform considering mountainous terrain as claimed in claim 1, wherein the observation system comprises a resistance-capacitance voltage divider, an oscilloscope, a coaxial cable, a static camera and a high-speed camera, and the resistance-capacitance voltage divider is connected with the impulse voltage generator in parallel and used for acquiring impulse voltage waveform; the oscilloscope is connected with the resistance-capacitance voltage divider through a coaxial cable and is used for recording impulse voltage waveform; the static camera is used for observing a discharge path; a high-speed camera is used to observe the discharge development process.
7. A method for selecting the size of a slope model for simulating a hillside is characterized by comprising the following steps:
step 1, analyzing electrostatic field distribution characteristics of a rod-slope air gap by adopting a finite element calculation method;
step 2, comparing the difference between the spatial electric field distribution under different slope surface sizes and the electric field distribution of a large-size sloping field;
and 3, selecting a hillside model with electric field distribution close to that of a large-size sloping field according to the space requirement of the test field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555402.2A CN111337796A (en) | 2018-12-19 | 2018-12-19 | Power transmission line lightning shielding failure model test platform and method considering mountain terrain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555402.2A CN111337796A (en) | 2018-12-19 | 2018-12-19 | Power transmission line lightning shielding failure model test platform and method considering mountain terrain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111337796A true CN111337796A (en) | 2020-06-26 |
Family
ID=71181659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811555402.2A Pending CN111337796A (en) | 2018-12-19 | 2018-12-19 | Power transmission line lightning shielding failure model test platform and method considering mountain terrain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111337796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255633A (en) * | 2021-09-08 | 2022-03-29 | 武汉大学 | Multi-parameter synchronous observation platform and method for high-speed rotating object in discharging process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001147279A (en) * | 1999-09-09 | 2001-05-29 | Furukawa Electric Co Ltd:The | Lighting strike position orientation method |
| CN102957139A (en) * | 2012-10-09 | 2013-03-06 | 李景禄 | Dissymmetry shielding failure preventing protection method of transmission line |
| CN104614612A (en) * | 2015-02-02 | 2015-05-13 | 国家电网公司 | Simulating testing platform for electric shielding of double-loop linear angle tower |
| CN205263221U (en) * | 2015-12-30 | 2016-05-25 | 武汉大学 | Super high tension transmission line shaft tower lightning shielding ability analogue test platform |
| CN205450143U (en) * | 2015-12-30 | 2016-08-10 | 武汉大学 | Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence |
| CN207650293U (en) * | 2017-11-23 | 2018-07-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of extra high voltage direct current transmission line lightning shielding analogue test platform |
-
2018
- 2018-12-19 CN CN201811555402.2A patent/CN111337796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001147279A (en) * | 1999-09-09 | 2001-05-29 | Furukawa Electric Co Ltd:The | Lighting strike position orientation method |
| CN102957139A (en) * | 2012-10-09 | 2013-03-06 | 李景禄 | Dissymmetry shielding failure preventing protection method of transmission line |
| CN104614612A (en) * | 2015-02-02 | 2015-05-13 | 国家电网公司 | Simulating testing platform for electric shielding of double-loop linear angle tower |
| CN205263221U (en) * | 2015-12-30 | 2016-05-25 | 武汉大学 | Super high tension transmission line shaft tower lightning shielding ability analogue test platform |
| CN205450143U (en) * | 2015-12-30 | 2016-08-10 | 武汉大学 | Topography is to test platform of special high tension transmission line shaft tower lightning shielding ability influence |
| CN207650293U (en) * | 2017-11-23 | 2018-07-24 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of extra high voltage direct current transmission line lightning shielding analogue test platform |
Non-Patent Citations (2)
| Title |
|---|
| 孟刚: ""高海拔地区500kV变电站空气间隙冲击耐受特性和海拔修正研究"", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 鄂盛龙 等: ""平原和山区同塔双回特高压输电线路雷击特性模拟试验"", 《电网技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255633A (en) * | 2021-09-08 | 2022-03-29 | 武汉大学 | Multi-parameter synchronous observation platform and method for high-speed rotating object in discharging process |
| CN114255633B (en) * | 2021-09-08 | 2024-04-16 | 武汉大学 | Multi-parameter synchronous observation platform and method for discharge process of high-speed rotating object |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207650293U (en) | A kind of extra high voltage direct current transmission line lightning shielding analogue test platform | |
| CN106199354B (en) | Insulator chain parallel connection gaps lightning impulse validity and flash-over characteristic test method | |
| Zhou et al. | Numerical analysis of lightning attachment to wind turbine blade | |
| Yang et al. | Lightning impulse corona characteristic of 1000-kV UHV transmission lines and its influences on lightning overvoltage analysis results | |
| CN104502819A (en) | Arrester impact characteristics testing device and method | |
| CN109670205B (en) | Lightning protection evaluation system for wind power plant | |
| Rizk | Modeling of lightning exposure of sharp and blunt rods | |
| CN107643478B (en) | Lightning stroke test system of lightning stroke tower shrinkage model | |
| Vahidi et al. | Leader progression analysis model for shielding failure computation by using the charge simulation method | |
| CN109254229A (en) | The verification method of the lightning protection of captive balloon | |
| CN107390031B (en) | Grounding impedance testing device and testing method thereof | |
| CN111337796A (en) | Power transmission line lightning shielding failure model test platform and method considering mountain terrain | |
| CN102799112B (en) | Method for determining aircraft lightning stroke attachment point position | |
| CN113866560A (en) | On-site experiment device for dangerous influence on buried pipe network when power grid has ground fault | |
| CN103954858B (en) | Airborne antenna lightning effects test macro and method | |
| CN109444688B (en) | 10kV distribution network insulated conductor and tree obstacle's thunderbolt analogue test platform | |
| CN105678014B (en) | A kind of energy storage characteristic of gas medium and discharge voltage prediction technique | |
| CN210038045U (en) | Lightning-induced tower protection range test platform | |
| Malcolm et al. | An analysis of reducing back flashover faults with surge arresters on 69/138 kV double circuit transmission lines due to direct lightning strikes on the shield wires | |
| CN104950195B (en) | Simulation Wind turbines blade draws the experimental rig and method of thunder | |
| CN207380187U (en) | One kind draws Reatta scale model lightning test system | |
| CN108710072B (en) | SF6 gas breakdown characteristic test system under actual impulse voltage waveform of electric appliance | |
| JP2013054841A (en) | Lightning potential rise suppressor of building | |
| Zhang et al. | Study on overvoltage of signal line in wind turbine by lightning strike | |
| Astinfeshan et al. | Analysis of corona effect on lightning performance of HV overhead transmission line using ATP/EMTP |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200626 |
|
| RJ01 | Rejection of invention patent application after publication |