CN113325104A - C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform - Google Patents
C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform Download PDFInfo
- Publication number
- CN113325104A CN113325104A CN202110602428.3A CN202110602428A CN113325104A CN 113325104 A CN113325104 A CN 113325104A CN 202110602428 A CN202110602428 A CN 202110602428A CN 113325104 A CN113325104 A CN 113325104A
- Authority
- CN
- China
- Prior art keywords
- gas
- mixed gas
- transformer
- voltage
- optimal
- 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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/72—Mass spectrometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- 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
- G01R31/1281—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 liquids or gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N2030/042—Standards
- G01N2030/047—Standards external
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
- G01N2030/8859—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample inorganic compounds
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to a gas-insulated electrical apparatus C4F7N/CO2/O2The optimal mixture ratio selection method and platform for the mixed gas comprise an induction voltage regulator and a transformer, wherein the primary side of the transformer is connected with the input end of the induction voltage regulator, the secondary side of the transformer is sequentially connected with a protection resistor and a capacitive voltage divider in series to form a loop, and the anode and the cathode of a gas chamber are connected with two ends of the capacitive voltage divider; the maximum output voltage of the transformer is 100kV, the voltage division ratio of the capacitive divider is 1:1000, the protective resistance is 10k omega, and the transformer is connected with a power supplyThe volume of the electric chamber is 29L, one side of the air chamber is provided with an air collecting port for collecting mixed gas before and after the experiment according to C4F7N/CO2/O2The insulation and decomposition characteristics of the mixed gas under different oxygen contents, the optimal proportion of the mixed gas applied to medium-voltage gas insulation electric equipment is determined, and C is improved4F7N/CO2/O2The insulating strength of the mixed gas insulating medium reduces carbon precipitation in the equipment, and ensures safe and stable operation of the equipment.
Description
Technical Field
The invention relates to a C of a medium-voltage gas-insulated electrical apparatus4F7N/CO2/O2The optimal mixture ratio of the mixed gas is selected by the environment-friendly method C4F7N/CO2/O2Engineering applications of mixed gas insulating media provide reference.
Background
With the increasing shortage of urban land resources and the need for convenient and reliable operation and maintenance, etc., in recent years, the method uses SF6Gas insulation devices using gas as an insulation medium are widely used in the power industry, and the amount of use is increasing. Taking into account SF6Is a serious greenhouse gas, and adopts environment-friendly insulating medium to replace SF6Is to limit SF6An important means of use. C4F7N/CO2/O2The mixed gas becomes the environment-friendly gas insulating medium with the most application potential at present due to the excellent insulating, arc extinguishing and environment-friendly characteristics of the mixed gas. O is2As a second additive gas to C4F7N/CO2In the mixed gas to improve the switching performance, reduce the generation of harmful solid by-products (carbon particles), and improve the breaking performance of the switchgear, but considering O2Should have chemical stability under the conditions of engineering application, and C needs to be optimized4F7N/CO2/O2The proportion of the mixed gas meets the requirements of engineering application.
Disclosure of Invention
The invention mainly aims at the environment-friendly type C applied to the gas insulated electrical equipment at present4F7N/CO2/O2The optimal mixture ratio of the mixed gas is researched to determine C4F7N/CO2/O2The mixed gas is applied to the optimal proportion of medium-voltage gas-insulated electrical equipment, and the C is improved4F7N/CO2/O2The insulating strength of the mixed gas insulating medium reduces carbon precipitation in the equipment, and ensures safe and stable operation of the equipment.
In order to achieve the above object, the specific technical scheme of the invention is as follows:
c suitable for gas insulation electrical equipment4F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising the following steps of:
step 1, after air washing and inflation are sequentially carried out, testing is carried out, after the air inflation is finished, pressure regulation is carried out through a pressure regulator, a power frequency withstand voltage test is finished, and the insulating property of an insulating medium is tested; when in pressurization, a gradual boosting method is adopted to slowly pressurize at a constant speed until breakdown; each group of experiments is carried out for 100 times, and the breakdown voltages of the first 20 times of each group are counted and averaged;
2, analyzing the types and the contents of the gas characteristic products by adopting a gas chromatography-mass spectrometry combination instrument every 20 times; analyzing the gas characteristic product by adopting an SIM mode in a gas chromatography-mass spectrometer to obtain CF4、C2F6、C3F8、C3F6And detecting and analyzing absolute quantity of decomposition products of the five obtained standard gases of CO by an external standard method; analyzing other decomposition products by a relative quantitative method to obtain the variation trend of the output of different decomposition products along with the oxygen content;
and 3, comparing the average value of breakdown voltage under different oxygen contents with the change of the content of the decomposition product, and extracting an optimal oxygen addition amount or range to ensure that the insulation strength of the mixed gas is optimal and the content of most of byproducts is minimum.
In the above-mentioned a C suitable for gas-insulated electrical equipment4F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas comprises the following specific steps of: and (3) carrying out gas washing operation on the test equipment needing gas filling, filling the tank body with background gas CO2, vacuumizing by using a vacuum pump, and finally vacuumizing the tank body into a vacuum state after the operation is repeatedly finished for 3 times.
In the above-mentioned a C suitable for gas-insulated electrical equipment4F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas comprises the following specific steps of: calculating the partial pressure occupied by the mixed gas in the corresponding proportion through a Dalton partial pressure law, and sequentially filling the test gas into the tank body through the guide pipe in cooperation with a precision pressure gauge.
In the above-mentioned a C suitable for gas-insulated electrical equipment4F7N/CO2/O2In the process of gas filling, because the gas pressure in the prior SF6 switch cabinet is not more than 0.20MPa, the main stream gas filling pressure is 0.12MPa, and related documents show that the gas pressure is in the range of 0.1-0.2MPa, if the C4F7N/CO2 mixed gas can meet the lowest operation temperature of-25 ℃, the content of C4F7N in the mixed gas is not more than 18 percent, and the insulating property of the 0.14MPa C4F7N/CO2 mixed gas in slightly uneven fields is similar to the property of pure SF6 of 0.12 MPa; adopting mixed gas with 15% C4F7N content, gas pressure of 0.14MPa, mixed O2 content of 2%, 4%, 6%, 8%, 10%, and further containing different oxygen contentsThe insulation and decomposition characteristics of the C4F7N/CO2/O2 mixed gas were investigated.
In the above-mentioned a C suitable for gas-insulated electrical equipment4F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas comprises the following steps of dipping alcohol cotton into absolute ethyl alcohol to wipe the interior of a test device before gas washing, sealing the test device after natural air drying, filling a certain amount of background gas CO2, standing for 24 hours, and checking the air tightness.
C suitable for gas insulation electrical equipment4F7N/CO2/O2The platform of the method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising an induction voltage regulator and a transformer, wherein the primary side of the transformer is connected with the input end of the induction voltage regulator, the secondary side of the transformer is sequentially connected with a protection resistor and a capacitive voltage divider in series to form a loop, and the anode and the cathode of a gas chamber are connected with two ends of the capacitive voltage divider; the maximum output voltage of the transformer is 100kV, the voltage division ratio of the capacitive voltage divider is 1:1000, the protection resistor is 10k omega, the volume of the discharge gas chamber is 29L, and a gas collecting port is arranged on one side of the gas chamber and used for collecting mixed gas before and after an experiment.
According to the invention4F7N/CO2/O2The insulation and decomposition characteristics of the mixed gas under different oxygen contents, the optimal proportion of the mixed gas applied to medium-voltage gas insulation electric equipment is determined, and C is improved4F7N/CO2/O2The insulating strength of the mixed gas insulating medium reduces carbon precipitation in the equipment, and ensures safe and stable operation of the equipment.
Drawings
FIG. 1 is a gas discharge decomposition experimental platform.
FIG. 2 is a flow chart of the experimental procedure.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
(1) preparation before testing
Firstly, dipping absolute ethyl alcohol by alcohol cotton to wipe the interior of a test device, sealing the test device after natural air drying, then filling a certain amount of background gas, standing for 24 hours, and checking the air tightness of the test device; the 1 is an induction voltage regulator, and the output voltage range of the induction voltage regulator is 0-380V; the experimental device comprises an induction voltage regulator and a transformer, wherein the primary side of the transformer is connected with the input end of the induction voltage regulator, the secondary side of the transformer is sequentially connected with a protection resistor and a capacitive voltage divider in series to form a loop, and the anode and the cathode of an air chamber are connected with two ends of the capacitive voltage divider; the maximum output voltage of the transformer is 100kV, the voltage division ratio of the capacitive voltage divider is 1:1000, the protection resistor is 10k omega, the volume of the discharge gas chamber is 29L, and a gas collecting port is arranged on one side of the gas chamber and used for collecting mixed gas before and after an experiment.
The corona-free test transformer can provide the highest power frequency test voltage of 100kV for the experiment; the protection impedance provides protection for the test transformer and prevents the transformer from being damaged; the capacitive voltage divider can convert a test voltage with a higher amplitude into a voltage value which can be directly read by a voltmeter; the gas insulation performance test device is convenient to install and simulate electrode types of different electric fields and fill test gas, and further the insulation performance of the gas to be tested is tested. The gas insulation performance test device is internally provided with a gas chromatography-mass spectrometer used for measuring the type and the content of a product after breakdown decomposition of a gas insulation medium.
(2) Scrubbing gas
Secondly, performing gas washing operation on the test equipment needing gas filling, filling background gas CO2 into the tank body, vacuumizing by using a vacuum pump, and finally vacuumizing the tank body into a vacuum state after the operation is repeatedly completed for 3 times, and then performing the next operation;
(3) inflation
Calculating the partial pressure occupied by the mixed gas in the corresponding proportion through a Dalton partial pressure law, and sequentially filling the test gas into the tank body through the guide pipe in cooperation with a precision pressure gauge. The content of C4F7N in the gas mixture of the gas insulating medium C4F7N/CO2/O2 is 15%, the gas pressure is 0.14MPa, and the content of the mixed O2 is 2%, 4%, 6%, 8% and 10%.
(4) Test of
After the gas is filled, the pressure is regulated by a pressure regulator, a power frequency withstand voltage test is completed, and the pressure is measuredThe insulating properties of the insulating medium were tested. And during pressurization, a gradual boosting method is adopted to slowly pressurize at a constant speed until breakdown. Each group of experiments is performed for 100 times, the breakdown voltages of the first 20 times of each group are counted and averaged, and the type and the content of the gas characteristic product are analyzed by adopting a gas chromatography-mass spectrometry combination instrument every 20 times. In order to ensure that the mixed gas can be fully self-recovered and prevent the influence of the local gas insulation characteristic reduction caused by breakdown on the whole breakdown voltage test, the interval is 3min after each breakdown. After the test is completed, the different oxygen contents C are compared comprehensively4F7N/CO2/O2The dielectric strength and decomposition characteristics of the mixed gas are determined by selecting the oxygen addition amount with the highest average breakdown voltage and the least byproduct content as C4F7N/CO2/O2Optimum oxygen addition amount of the mixed gas.
Claims (6)
1. C suitable for gas insulation electrical equipment4F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising the following steps of:
step 1, after air washing and inflation are sequentially carried out, testing is carried out, after the air inflation is finished, pressure regulation is carried out through a pressure regulator, a power frequency withstand voltage test is finished, and the insulating property of an insulating medium is tested; when in pressurization, a gradual boosting method is adopted to slowly pressurize at a constant speed until breakdown; each group of experiments is carried out for 100 times, and the breakdown voltages of the first 20 times of each group are counted and averaged;
2, analyzing the types and the contents of the gas characteristic products by adopting a gas chromatography-mass spectrometry combination instrument every 20 times; analyzing the gas characteristic product by adopting an SIM mode in a gas chromatography-mass spectrometer to obtain CF4、C2F6、C3F8、C3F6And detecting and analyzing absolute quantity of decomposition products of the five obtained standard gases of CO by an external standard method; analyzing other decomposition products by a relative quantitative method to obtain the variation trend of the output of different decomposition products along with the oxygen content;
and 3, comparing the average value of breakdown voltage under different oxygen contents with the change of the content of the decomposition product, and extracting an optimal oxygen addition amount or range to ensure that the insulation strength of the mixed gas is optimal and the content of most of byproducts is minimum.
2. C suitable for gas-insulated electrical apparatus according to claim 14F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising the following specific steps of: and (3) carrying out gas washing operation on the test equipment needing gas filling, filling the tank body with background gas CO2, vacuumizing by using a vacuum pump, and finally vacuumizing the tank body into a vacuum state after the operation is repeatedly finished for 3 times.
3. C suitable for gas-insulated electrical apparatus according to claim 14F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising the following specific steps of: calculating the partial pressure occupied by the mixed gas in the corresponding proportion through a Dalton partial pressure law, and sequentially filling the test gas into the tank body through the guide pipe in cooperation with a precision pressure gauge.
4. C suitable for gas-insulated electrical apparatus according to claim 14F7N/CO2/O2The method for selecting the optimal proportion of the mixed gas is characterized in that in the aeration operation, because the air pressure in the prior SF6 switch cabinet is not more than 0.20MPa, the main stream aeration pressure is 0.12MPa, and related documents show that the air pressure is in the range of 0.1-0.2MPa, if the C4F7N/CO2 mixed gas can meet the lowest operation temperature of-25 ℃, the content of C4F7N in the mixed gas is not more than 18 percent, and the insulating property of the 0.14MPa C4F7N/CO2 mixed gas in a slightly uneven field is similar to the pure SF6 property of 0.12 MPa; adopting mixed gas with 15% of C4F7N content, the gas pressure is 0.14MPa, the content of mixed O2 is 2%, 4%, 6%, 8% and 10%, and further for C with different oxygen contents4F7N/CO2/O2The insulation and decomposition characteristics of the mixed gas were investigated.
5. C suitable for gas-insulated electrical apparatus according to claim 14F7N/CO2/O2The method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising a preparation operation before gas washing, specifically, firstly, using alcohol cotton to dip absolute ethyl alcohol to wipe the interior of a test device, sealing the test device after natural air drying, then filling a certain amount of background gas CO2, standing for 24 hours, and checking the air tightness.
6. C suitable for gas insulation electrical equipment4F7N/CO2/O2The platform of the method for selecting the optimal mixture ratio of the mixed gas is characterized by comprising an induction voltage regulator and a transformer, wherein the primary side of the transformer is connected with the input end of the induction voltage regulator, the secondary side of the transformer is sequentially connected with a protection resistor and a capacitive voltage divider in series to form a loop, and the anode and the cathode of a gas chamber are connected with two ends of the capacitive voltage divider; the maximum output voltage of the transformer is 100kV, the voltage division ratio of the capacitive voltage divider is 1:1000, the protection resistor is 10k omega, the volume of the discharge gas chamber is 29L, and a gas collecting port is arranged on one side of the gas chamber and used for collecting mixed gas before and after an experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110602428.3A CN113325104A (en) | 2021-05-31 | 2021-05-31 | C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110602428.3A CN113325104A (en) | 2021-05-31 | 2021-05-31 | C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113325104A true CN113325104A (en) | 2021-08-31 |
Family
ID=77423057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110602428.3A Pending CN113325104A (en) | 2021-05-31 | 2021-05-31 | C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113325104A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184913A (en) * | 2021-11-30 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | C5F10O-mixed gas electrical insulation characteristic test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO113497B1 (en) * | 1989-03-16 | 1998-07-30 | I C S I T Mtae | Method and installation for determining the air-gap dielectric characteristic in high-voltage switches |
| CN103913682A (en) * | 2014-03-28 | 2014-07-09 | 重庆大学 | Insulating gas insulating performance experiment system and method thereof applied to electrical equipment |
| CN110108813A (en) * | 2019-05-23 | 2019-08-09 | 沈阳工业大学 | Detect the device and method of perfluor isobutyronitrile and carbon dioxide gas mixture decomposition product |
| CN110807247A (en) * | 2019-10-09 | 2020-02-18 | 平高集团有限公司 | SF based on environmental protection6Alternative medium selection method |
-
2021
- 2021-05-31 CN CN202110602428.3A patent/CN113325104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO113497B1 (en) * | 1989-03-16 | 1998-07-30 | I C S I T Mtae | Method and installation for determining the air-gap dielectric characteristic in high-voltage switches |
| CN103913682A (en) * | 2014-03-28 | 2014-07-09 | 重庆大学 | Insulating gas insulating performance experiment system and method thereof applied to electrical equipment |
| CN110108813A (en) * | 2019-05-23 | 2019-08-09 | 沈阳工业大学 | Detect the device and method of perfluor isobutyronitrile and carbon dioxide gas mixture decomposition product |
| CN110807247A (en) * | 2019-10-09 | 2020-02-18 | 平高集团有限公司 | SF based on environmental protection6Alternative medium selection method |
Non-Patent Citations (3)
| Title |
|---|
| 张晓星等: "高压下环保型C4F7N/CO2 混合气体", 《电工技术学报》 * |
| 陈琪等: "O2对C4F7N/N2/O2混合气体绝缘和放电分解特性的影响", 《高电压技术》 * |
| 陈琪等: "环保绝缘介质C4F7N/CO2/O2混合气体的放电分解特性", 《电工技术学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184913A (en) * | 2021-11-30 | 2022-03-15 | 国网重庆市电力公司电力科学研究院 | C5F10O-mixed gas electrical insulation characteristic test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mantilla et al. | Investigation of the insulation performance of a new gas mixture with extremely low GWP | |
| CN111678982B (en) | Experimental method and device for detecting gas-solid insulation compatibility of substitute gas | |
| Xiao et al. | Insulation performance and electrical field sensitivity properties of HFO-1336mzz (E)/CO 2: A new eco-friendly gas insulating medium | |
| CN113325104A (en) | C suitable for gas-insulated electrical equipment4F7N/CO2/O2Mixed gas optimal ratio selection method and platform | |
| CN107561425A (en) | Characteristics of Partial Discharge recognition methods based on sulfur hexafluoride gas resolution characteristic | |
| CN110108990A (en) | A kind of experimental rig and method for environmental-protective gas-insulating performance study | |
| Xiao et al. | AC breakdown characteristics of CF 3 I/N 2 in a non-uniform electric field | |
| CN111722066A (en) | Method for testing partial discharge initial voltage of environment-friendly gas insulation medium | |
| Zhang et al. | Insulation properties of C 4 F 7 N/CO 2 mixtures under lightning impulse | |
| Singha et al. | Very fast transient overvoltages in GIS with compressed SF/sub 6/-N/sub 2/gas mixtures | |
| CN116047234A (en) | SF6N2 mixed gas decomposition test system and insulation defect diagnosis method | |
| CN113237912A (en) | Detection C4F7N/CO2/O2Anti-oxidation test device for compatibility of gas and solid material | |
| Zheng et al. | Experimental and calculation study on insulation strength of C 4 F 7 N/CO 2 at low temperature | |
| CN114184913A (en) | C5F10O-mixed gas electrical insulation characteristic test method | |
| Guastavino et al. | Dielectric characterization of gas mixtures as electrical insulating for high voltage components and appliances | |
| Zhou et al. | Breakdown characteristics of C 4 F 7 N/CO 2 mixtures under steep-wavefront impulse voltages | |
| Kamarudin et al. | Purpose-built test rig for gas insulation breakdown tests under lightning impulse | |
| Qin et al. | Insulation properties of SF 6/N 2 gas mixtures under high pressure and low ratio | |
| Li et al. | Breakdown Characteristics of C $ _ {5} $ F $ _ {10} $ O/N $ _ {2} $ Mixtures in a Uniform Field Under AC Voltage | |
| Wang et al. | Decomposition products and mechanism of C 5 F 10 O/N 2 gas mixture by electron attachment mass spectrometry | |
| Miao et al. | Recognition of partial discharge types based on SF 6 decomposed components under negative DC | |
| Okubo et al. | Partial discharge inception and breakdown characteristics in gas mixtures with SF 6 | |
| Ambo et al. | AC breakdown performance analysis of SF 6/N 2 and SF 6/CO 2 gas mixtures for ring main unit (RMU) switchgear application | |
| Li et al. | Surface Flashover Properties of the 220 kV Epoxy Insulator in C 4 F 7 N/CO 2 Mixtures | |
| Pattanadech et al. | Dissolved gas analysis caused by electrical breakdown of liquid impregnated pressboards |
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: 20210831 |
|
| RJ01 | Rejection of invention patent application after publication |