CN102262194B - Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment - Google Patents
Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment Download PDFInfo
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- CN102262194B CN102262194B CN 201110160224 CN201110160224A CN102262194B CN 102262194 B CN102262194 B CN 102262194B CN 201110160224 CN201110160224 CN 201110160224 CN 201110160224 A CN201110160224 A CN 201110160224A CN 102262194 B CN102262194 B CN 102262194B
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Abstract
The invention relates to a method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment. The method is characterized by comprising the following steps of: judging whether the faults occur or not and determining the types of the faults according to product components generated after the faults of the electrical equipment insulated by the mixed gas of c-C4F8 and N2 or CO2or CO or CF4 occur, and if only C2F4 gas and C3F6 gas are detected, indicating that the overheating faults of the equipment occur; if C2F6 gas, the C2F4 gas, C3F8 gas and the C3F6 gas are detected simultaneously, indicating that the discharging faults of the equipment occur; and judging whether the faults are serious and needed to be maintained or not according to the change condition of the content of products.
Description
Technical field
The present invention relates to a kind of method of c-C4F8 mixing mixed gas device interior fault, particularly c-C4F8 and with the method for the Mixed gas insulation inside electric appliance fault of N2 or CO2 or CO or CF4.
Background technology
SF6 gas has good insulating capacity, arc extinguishing ability, chemical stability and avirulence, thereby is widely used in the air insulating device, such as gas-insulated transformer, gas insulation breaker, gas-insulated transmission of electricity pipeline etc.But pure SF6 gas is very responsive to the electric field unevenness, and is high to the equipment processing request; And the discharge analyte of SF6 gas, such as SO2F2, SOF2, SF4, SF2, H2S, SOF4 etc., be extremely toxic substance, threaten very large to the personnel health; In addition, the greenhouse effect of SF6 gas are very large, its global warming latent energy value (GWP) approximately is 23900 times of CO2 gas, and about 3200 of the life-span in atmosphere, the climate change pact contracting party of the United Nations classifies SF6 gas as one of greenhouse gases of six kinds of restriction uses in the Kyoto Protocol of signing in 1997.Therefore the scientific research personnel has carried out a large amount of research, wishes to search out to substitute the new medium that SF6 gas is used for electrical equipment.The mixed gas of fluorocarbon gas and N2 or CO2 or CO or CF4 is a class place of gas preferably wherein, use fluorocarbon gas and with the mixed gas such as N2 be a direction of insulation of electrical installation development as insulating medium.
Chinese patent 200910227266.8 has provided a kind of method of using gas chromatograph to detect SF6 insulation electrical equipment internal fault, but it is only meaningful to the equipment that uses SF6 gas.Can not be used for the fault detect of the electrical equipment of c-C4F8 mixing Mixed gas insulation.
Summary of the invention
The object of the present invention is to provide a kind of CF4, C2F6, C2F4, C3F8 and C3F6 gas content that passes through to detect in the c-C4F8 Mixed gas insulation electrical equipment, judge whether fluorocarbon gas insulation electrical equipment inside exists the method for fault.This detection method can be used for the electrical equipment of c-C4F8 gas and N2 or the Mixed gas insulations such as CO or CO2 or CF4, and wherein the c-C4F8 gas purity is 99.9%, and its ratio in mixed gas does not affect testing result.
The present invention is based on following principle:
When c-C4F8 gas insulated electric apparatus internal temperature reaches 260 degree and when above, overheat condition appears in described c-C4F8 Mixed gas insulation inside electric appliance, the interior insulating gas of electrical equipment this moment can decompose unsaturated fluorocarbon gas such as producing C2F4 and C3F6 such as c-C4F8 gas.And in the discharge fault situations such as corona, spark, electric arc, c-C4F8 gas can decompose fluorocarbon gas such as producing CF4, C2F6, C2F4, C3F8 and C3F6;
When having N2 or the gases such as CO or CO2 or CF4 to exist, c-C4F8 gas is in overheated and discharge fault situation, and the change of component of decomposition product is little.
For achieving the above object, the present invention is by the following technical solutions:
The method that the present invention detects c-C4F8 gas insulated electric apparatus internal fault is as follows:
(1) for the electrical equipment of the Mixed gas insulation of c-C4F8 gas and CF4:
If do not detect any existence in C2F6, C2F4, C3F8, the C3F6 gas, illustrate that c-C4F8 gas electric equipment operation is normal;
If detect simultaneously C2F4 and C3F6 gas, and do not have C2F6 and C3F8 gas, illustrate that there is overheating fault in c-C4F8 gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if the content of C2F4 and C3F6 has no significant change, think that then overheating fault may occur c-C4F8 gas electrical equipment, but very little on the impact of c-C4F8 gas electrical equipment, only need to continue to pay close attention to get final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%.If the ratio of C2F4 and the increase of C3F6 content and C2F4 and C3F6 increases, overheated thermal stability or the hyperthermia and superheating of 600 degree and higher temperature of having developed into is described, then should carry out out-of-service inspection to described c-C4F8 gas electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
If detect simultaneously C2F6, C2F4, C3F8 and C3F6 gas, illustrate that there is the overdischarge fault in c-C4F8 mixed gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if C2F6, C2F4, C3F8 and C3F6 content have no significant change, think that then the overdischarge fault may occur c-C4F8 mixed gas electrical equipment, but very little on the impact of c-C4F8 mixed gas electrical equipment, only need to continue to pay close attention to get final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%.Continue to increase if detect the content of C2F6, C2F4, C3F8 and C3F6 gas, just need to carry out out-of-service inspection to described c-C4F8 mixed gas electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
(2) for the electrical equipment of the Mixed gas insulation of c-C4F8 gas and N2 or CO or CO2;
The detection of overheating fault is identical with described (1) kind situation, and in the detection of discharge fault, CF4 gas also can be used as the characteristic gas of fault detect.If namely detect simultaneously CF4, C2F6, C2F4, C3F8 and C3F6 gas, illustrate that there is the overdischarge fault in c-C4F8 mixed gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if CF4, C2F6, C2F4, C3F8 and C3F6 content, think then that the overdischarge fault may occur c-C4F8 mixed gas electrical equipment without significant change, but impact is very little, only needs to continue to pay close attention to get final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%.Continue to increase if detect the content of CF4, C2F6, C2F4, C3F8 and C3F6 gas, just need to carry out out-of-service inspection to described c-C4F8 mixed gas electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
The invention has the beneficial effects as follows: the one, can in time detect unusual equipment, eliminate accident potential, avoid accident to occur; The 2nd, can be with electro-detection, the loss of avoiding equipment to stop transport and bring; The 3rd, detection method is simple, and testing cost is lower.
Description of drawings
Fig. 1 is the analysis process synoptic diagram that the present invention utilizes gas chromatograph-mass spectrometer (GCMS) checkout equipment fault;
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the analysis process synoptic diagram that the present invention utilizes gas chromatograph-mass spectrometer (GCMS) checkout equipment fault.As shown in Figure 1, the present invention is the method that gaseous product detects c-C4F8 Mixed gas insulation inside electric appliance fault in a kind of equipment, and it comprises the steps:
Step 1: it is for subsequent use to use sampling jar to extract the 200mL gaseous sample from electrical equipment;
Step 2: select 60m long, internal diameter be the capillary column of 0.32mm as chromatographic column, the chromatogram carrier gas is helium, purity is more than or equal to 99.99%, flow rate of carrier gas 1mL/min sets chromatograph column box temperature 50 degree, the gas sampling split ratio is 20: 1.When detector adopts thermal conductivity detector (TCD), detector temperature 100 degree, hot-wire temperature's 150 degree; When adopting mass detector, the ionization mode of using is EI source, ionizing energy 70eV;
Step 3: use syringe or quantitative sample injection ring, carry out sample introduction, inject the calibrating gas 0.25mL that contains CF4, C2F6, C2F4, C3F8, C3F6 and Balance Air N2 chromatograph is demarcated;
Step 4: get the on-the-spot gaseous sample 0.25mL that extracts in the first step, use and the 3rd step the same manner sample introduction, after gaseous sample separates through chromatographic column, by thermal conductivity detector (TCD) or mass spectrometer detect C2F6, C2F4, whether C3F8, C3F6 exist, and calculate the content of C2F6, C2F4, C3F8, C3F6 gas according to following manner:
Hi＝Hbi*Ai/Abi
Hi: i component concentration in the gaseous sample;
Hbi: i component concentration in the calibrating gas;
Ai: i component peaks area in the gaseous sample;
Abi: i component peaks area in the calibrating gas;
Step 5: we do a preliminary judgement according to the gas composition that detects to the device interior failure condition:
(1) for the electrical equipment of the Mixed gas insulation of c-C4F8 gas and CF4;
If do not detect any existence in C2F6, C2F4, C3F8, the C3F6 gas, illustrate that c-C4F8 mixed gas electric equipment operation is normal;
If detect simultaneously C2F4 and C3F6 gas, and do not have C2F6 and C3F8 gas, illustrate that there is overheating fault in c-C4F8 mixed gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if C2F4 and C3F6 content, think then that overheating fault may occur equipment without significant change, but impact is very little, only needs to continue to pay close attention to get final product; If C2F4 and C3F6 content increase and the value of C2F4/C3F6 increases, overheated thermal stability or the 600 degree hyperthermia and superheatings of having developed into are described, then should carry out out-of-service inspection to electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
If detect simultaneously C2F6, C2F4, C3F8 and C3F6 gas, illustrate that there is the overdischarge fault in c-C4F8 mixed gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if C2F6, C2F4, C3F8 and C3F6 content, think then that the overdischarge fault may occur equipment without significant change, but impact is very little, only needs to continue to pay close attention to get final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%.Continue to increase if detect the content of C2F6, C2F4, C3F8 and C3F6 gas, just need to carry out out-of-service inspection to c-C4F8 mixed gas electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
(2) for the electrical equipment of the Mixed gas insulation of c-C4F8 gas and N2 or CO or CO2;
The detection of overheating fault is identical with (1), and in the detection of discharge fault, CF4 gas also can be used as the characteristic gas of fault detect.If namely detect simultaneously CF4, C2F6, C2F4, C3F8 and C3F6 gas, illustrate that there is the overdischarge fault in c-C4F8 mixed gas electrical equipment, need to shorten sense cycle, grasp development trend.In follow-up detection, if CF4, C2F6, C2F4, C3F8 and C3F6 content, think then that the overdischarge fault may occur equipment without significant change, but impact is very little, only needs to continue to pay close attention to get final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%.Continue to increase if detect the content of CF4, C2F6, C2F4, C3F8 and C3F6 gas, just need to carry out out-of-service inspection to c-C4F8 mixed gas electrical equipment, in time remove a hidden danger, guarantee equipment safety operation.
The above is the process of use gas chromatography-mass spectrography detection gaseous product component, but the gas detection is not limited to the method, also can use infra-red sepectrometry, the gas detection method that photocaustic spectroscopy etc. are commonly used.
Claims (1)
1. one kind is detected c-C
4F
8The method of Mixed gas insulation inside electric appliance fault is characterized in that: described detection method is that basis is to described c-C
4F
8The testing result of gas composition and content in the mixed gas electrical equipment, judgment device internal fault situation is specially:
For c-C
4F
8Gas and N
2Or CO
2Or the electrical equipment of the Mixed gas insulation of CO, if do not detect CF
4, C
2F
6, C
2F
4, C
3F
8And C
3F
6Any existence in the gas illustrates described c-C
4F
8The mixed gas electric equipment operation is normal;
If detect simultaneously C
2F
4And C
3F
6Gas, and do not have C
2F
6And C
3F
8Gas illustrates described c-C
4F
8There is overheating fault in the mixed gas electrical equipment, needs to shorten sense cycle; In follow-up detection, if the C that detects
2F
4And C
3F
6Gas content has no significant change, and thinks that then there is the possibility that overheating fault occured in equipment, but to described c-C
4F
8The impact of mixed gas electrical equipment is very little, only needs to continue to pay close attention to C
2F
4And C
3F
6The gas content situation of change gets final product; Describedly refer to that without significant change content is in 10% for the gas of volumetric concentration in the component greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%; If C
2F
4And C
3F
6Content increases, and C
2F
4And C
3F
6Content ratio increase, illustrate overheated developed into thermal stability or occurred 600 spend hyperthermia and superheatings, then tackle described c-C
4F
8The Mixed gas insulation electrical equipment carries out out-of-service inspection, removes a hidden danger;
If detect simultaneously CF
4, C
2F
6, C
2F
4, C
3F
8And C
3F
6Gas illustrates c-C
4F
8There is the overdischarge fault in the Mixed gas insulation electrical equipment, needs to shorten sense cycle; In follow-up detection, if CF
4, C
2F
6, C
2F
4, C
3F
8And C
3F
6The content of gas has no significant change, and then thinks described c-C
4F
8There is the possibility that the overdischarge fault occurs in gas insulated electric apparatus, but impact is very little, only needs to continue to pay close attention to CF
4, C
2F
6, C
2F
4, C
3F
8And C
3F
6The gas content situation of change gets final product; Describedly refer to that without significant change content is in 10% for the gas of component volumetric concentration greater than 10ppm; Be lower than the gas of 10ppm for the component volumetric concentration, content is in 15%; If detect CF
4, C
2F
6, C
2F
4, C
3F
8And C
3F
6The content of gas continues to increase, and just needs described c-C
4F
8The Mixed gas insulation electrical equipment carries out out-of-service inspection, removes a hidden danger.
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| CN 201110160224 CN102262194B (en) | 2011-06-15 | 2011-06-15 | Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment |
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|---|---|---|---|
| CN 201110160224 CN102262194B (en) | 2011-06-15 | 2011-06-15 | Method for detecting internal faults of c-C4F8 mixed gas insulated electrical equipment |
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| CN102262194B true CN102262194B (en) | 2013-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220993A (en) * | 2019-07-04 | 2019-09-10 | 华北电力大学 | A method of judging gas insulated electric apparatus failure |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760285B (en) * | 2014-01-09 | 2016-01-20 | 中国人民解放军海军医学研究所 | A kind of Freon chromatographic column and preparation method thereof |
| CN109799444B (en) * | 2019-03-08 | 2020-09-15 | 中国科学院电工研究所 | Insulating medium fault simulation device for heat-electricity combination |
| CN113376276A (en) * | 2021-06-04 | 2021-09-10 | 云南电网有限责任公司丽江供电局 | Fault pre-judging method and system for heptafluoroisobutyronitrile mixed gas insulation equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762655A (en) * | 2009-12-03 | 2010-06-30 | 河南省电力公司平顶山供电公司 | Method for detecting internal fault of SF6 electrical equipment by using gas chromatograph |
| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
-
2011
- 2011-06-15 CN CN 201110160224 patent/CN102262194B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762655A (en) * | 2009-12-03 | 2010-06-30 | 河南省电力公司平顶山供电公司 | Method for detecting internal fault of SF6 electrical equipment by using gas chromatograph |
| CN101782614A (en) * | 2010-02-20 | 2010-07-21 | 中国科学院电工研究所 | Device for detecting breakdown of sulfur hexafluoride gas-insulated electrical equipment |
Non-Patent Citations (2)
| Title |
|---|
| Kang Li,Weijun Xing,guoqiang Zhang, Wenhao Niu, Xin Wang and Yin.Study on Decomposition Gas for Faults Diagnostic of Electrical Equipment Using Fluorocarbons.《2010 International Conference on Power System Technology》.2010, |
| Study on Decomposition Gas for Faults Diagnostic of Electrical Equipment Using Fluorocarbons;Kang Li,Weijun Xing,guoqiang Zhang, Wenhao Niu, Xin Wang and Yin;《2010 International Conference on Power System Technology》;20101231;第1页右栏第2段,第3页最后一段至第4页表1,第6页左栏最后四段, * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220993A (en) * | 2019-07-04 | 2019-09-10 | 华北电力大学 | A method of judging gas insulated electric apparatus failure |
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