CN112213450A - Method for dividing local overheating degree in SF6 gas insulation equipment - Google Patents
Method for dividing local overheating degree in SF6 gas insulation equipment Download PDFInfo
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- CN112213450A CN112213450A CN202011090605.6A CN202011090605A CN112213450A CN 112213450 A CN112213450 A CN 112213450A CN 202011090605 A CN202011090605 A CN 202011090605A CN 112213450 A CN112213450 A CN 112213450A
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- sulfur hexafluoride
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- 238000009413 insulation Methods 0.000 title claims abstract description 46
- 238000013021 overheating Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 19
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229910018503 SF6 Inorganic materials 0.000 claims abstract description 95
- 229960000909 sulfur hexafluoride Drugs 0.000 claims abstract description 78
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000000354 decomposition reaction Methods 0.000 claims description 27
- LSJNBGSOIVSBBR-UHFFFAOYSA-N thionyl fluoride Chemical compound FS(F)=O LSJNBGSOIVSBBR-UHFFFAOYSA-N 0.000 claims description 16
- DUGWRBKBGKTKOX-UHFFFAOYSA-N tetrafluoro(oxo)-$l^{6}-sulfane Chemical compound FS(F)(F)(F)=O DUGWRBKBGKTKOX-UHFFFAOYSA-N 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 8
- OBTWBSRJZRCYQV-UHFFFAOYSA-N sulfuryl difluoride Chemical compound FS(F)(=O)=O OBTWBSRJZRCYQV-UHFFFAOYSA-N 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 21
- 230000007547 defect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 101000856246 Arabidopsis thaliana Cleavage stimulation factor subunit 77 Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0067—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display by measuring the rate of variation of the concentration
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention provides a method for dividing local overheating degree in SF6 gas insulation equipment, which comprises the following steps: sampling and detecting sulfur hexafluoride decomposers in sulfur hexafluoride insulation electrical equipment for multiple times to obtain the content of the sulfur hexafluoride decomposers in the sulfur hexafluoride insulation electrical equipment at different time periods; and establishing a content ratio relation between the overheating degree and the sulfur hexafluoride decomposers, and determining the overheating degree condition in the sulfur hexafluoride insulated electrical equipment based on the content ratio relation.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a method for dividing local overheating degree in SF6 gas insulation equipment.
Background
At present, SF6 electrical equipment is widely applied to the field of power systems, but because the equipment is a full-sealed complete equipment with an aluminum alloy shell, local defects in the equipment are difficult to detect by conventional means. SF6 decomposition products SO2 and H2S are used as characteristic decomposition gases of equipment defects, are mostly in an exploration research stage at home and abroad at present, detection equipment of SF6 decomposition products does not have uniform standard requirements, detection of the decomposition products does not have uniform industrial standards, and judgment of internal overheating degree is lack of judgment basis.
Disclosure of Invention
The present invention is directed to a method for dividing local overheating degree inside SF6 gas insulation equipment, so as to solve the problems mentioned in the background art.
The invention is realized by the following technical scheme: a method of classifying the local degree of superheat within an SF6 gas insulated apparatus, comprising the steps of:
sampling and detecting sulfur hexafluoride decomposers in sulfur hexafluoride insulation electrical equipment for multiple times to obtain the content of the sulfur hexafluoride decomposers in the sulfur hexafluoride insulation electrical equipment at different time periods;
and establishing a content ratio relation between the overheating degree and the sulfur hexafluoride decomposers, and determining the overheating degree condition in the sulfur hexafluoride insulated electrical equipment based on the content ratio relation.
Preferably, the sulphur hexafluoride decomposition product content includes SO2F2、SOF2、SOF4、SO2、H2Gas concentration content of S.
Preferably, the interval time of the sampling detection is a fixed value T.
Preferably, establishing a content ratio relationship between the degree of superheat and the sulfur hexafluoride decomposition product, and determining the degree of superheat inside the sulfur hexafluoride insulated electrical equipment based on the content ratio relationship, includes:
and at the time of t1, detecting no sulfur hexafluoride decomposition product in the sulfur hexafluoride insulation electrical equipment, wherein the sulfur hexafluoride insulation electrical equipment is in a normal state.
Preferably, the method further comprises the following steps:
at time t2, when SO is detected in the sulfur hexafluoride decomposition product2F2、SOF2、SOF4、SO2Time, calculate
And a TCRRMSA value of (d);
when in use
And 0 < TCRRMSWhen the sulfur hexafluoride insulation electric equipment is less than or equal to 0.05In a slightly superheated state, where C (x) represents the gas concentration content, lgC (x) represents the logarithm of the gas concentration content, TCRRMSIs composed of
Is determined.
Preferably, SO is present in the sulfur hexafluoride decomposition product at time t32F2、SOF2、SOF4、SO2When the content of (b) is greater than t2, calculating
And a TCRRMSA value of (d);
when in use
And 0.05 < TCRRMSAnd when the temperature is less than or equal to 1, the sulfur hexafluoride insulation electrical equipment is in an overheat state.
Preferably, at time t4, H is present in the sulfur hexafluoride decomposition product2S, and SO2F2、SOF2、SOF4、SO2When the content of (b) is greater than t3, calculating
And a TCRRMSA value of (d);
when in use
And 1 < TCRRMSAnd when the temperature is less than or equal to 2.5 ℃, the sulfur hexafluoride insulation electric equipment is in a serious overheating state.
Preferably, SO is present in the sulfur hexafluoride decomposition product at time t52F2、SOF2、SOF4、SO2、H2When the content of S is more than t4, calculating
And a TCRRMSValue of (A)
When in use
And a TCRRMSAnd when the temperature is higher than 2.5 ℃, the sulfur hexafluoride insulated electrical equipment is in an extremely overheated state.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for diagnosing defect types of sulfur hexafluoride insulation electrical equipment, which takes an SF6 decomposition product generated when the sulfur hexafluoride insulation electrical equipment breaks down as a detection object, performs sampling detection at regular intervals, determines a characteristic parameter range by calculating the ratio of different characteristic gas contents, and diagnoses the overheating degree of the sulfur hexafluoride insulation electrical equipment. The method for judging the running state of the electrical equipment by utilizing the chemical means has the advantages of low cost, simplicity and convenience in operation and high judgment accuracy.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a structural diagram of a method for dividing local overheating degree inside SF6 gas insulation equipment according to the present invention.
Detailed Description
In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.
Referring to fig. 1, a method for dividing local overheating degree inside an SF6 gas insulation apparatus includes the following steps:
s1, carrying out sampling detection on sulfur hexafluoride decomposers in the sulfur hexafluoride insulation electrical equipment for multiple times, and obtaining the content of the sulfur hexafluoride decomposers in the sulfur hexafluoride insulation electrical equipment at different time periods;
the sulfur hexafluoride gas is used as the insulating filling gas in the insulating electrical equipment, has very stable chemical properties and is not easy to decompose. However, under the action of factors such as partial discharge, spark discharge, arc discharge and local overheating, ionic bonds in sulfur hexafluoride gas molecules are broken to cause cracking, and low fluoride compounds (SFx) such as SF5, SF4, SF3, SF2 and SF are formed. SFx reacts further with impurity gases such as moisture and oxygen to generate component gases such as SO2F2, SOF2, SO2, HF and H2S; when acting with solid organic insulating materials, metal materials and the like, SFx further reacts to generate carbon-containing component gases such as CO2 and CF 4.
In an embodiment of the invention, it is determined that the sulphur hexafluoride decomposition product to be detected comprises SO2F2、SOF2、SOF4、SO2、H2And S, in the sampling detection, taking a fixed value T as the acquisition interval time, and sampling and detecting the gas concentration condition of sulfur hexafluoride decomposition products in the sulfur hexafluoride insulation electrical equipment.
S2, establishing a content ratio relation between the overheating degree and the sulfur hexafluoride decomposers, and determining the overheating degree condition in the sulfur hexafluoride insulation electrical equipment based on the content ratio relation, wherein the content ratio relation specifically comprises the following steps:
sampling and detecting the gas concentration condition of sulfur hexafluoride decomposition products in sulfur hexafluoride insulation electrical equipment at the moments of t1, t2, t3, t4 and t 5;
and at the time of t1, detecting no sulfur hexafluoride decomposition product in the sulfur hexafluoride insulation electrical equipment, wherein the sulfur hexafluoride insulation electrical equipment is in a normal state, and the temperature range in the sulfur hexafluoride insulation electrical equipment is-20 ℃ and K is less than or equal to 120 ℃.
When SO is detected to be contained in the sulfur hexafluoride decomposition product at the time point t22F2、SOF2、SOF4、SO2Time, calculate
And a TCRRMSA value of (d);
when in use
And 0 < TCRRMSWhen the temperature is less than or equal to 0.05, the sulfur hexafluoride insulation electrical equipment is in a slight overheating state, and heat points with the temperature range of more than 120 ℃ and less than or equal to 260 ℃ exist in the sulfur hexafluoride insulation electrical equipment.
Wherein C (x) represents the gas concentration content, lgC (x) represents the logarithm of the gas concentration content, TCRRMSIs composed of
Is determined.
And the TCRRMSThe calculation method of (c) is as follows:
wherein the TCRiIs composed of
The value at the ith sampling, n, is the number of samplings.
At time t3 when SO is present in sulfur hexafluoride decomposition product2F2、SOF2、SOF4、SO2When the content of (b) is greater than t2, calculating
And a TCRRMSA value of (d);
when in use
And 0.05 < TCRRMSWhen the temperature is less than or equal to 1, the sulfur hexafluoride insulation electrical equipment is in an overheat state, and heat points with the temperature range of 260 ℃ to K and less than or equal to 340 ℃ exist in the sulfur hexafluoride insulation electrical equipment.
At time t4, when H appears in sulfur hexafluoride decomposition product2S, and SO2F2、SOF2、SOF4、SO2When the content of (b) is greater than t3, calculating
And a TCRRMSA value of (d);
when in use
And 1 < TCRRMSWhen the temperature is less than or equal to 2.5, the sulfur hexafluoride insulation electrical equipment is in a serious overheating state, and heat points with the temperature range of more than 340 ℃ and less than or equal to t and less than or equal to 420 ℃ exist in the sulfur hexafluoride insulation electrical equipment.
At time t5, when SO is contained in sulfur hexafluoride decomposition product2F2、SOF2、SOF4、SO2、H1When the content of S is more than t4, calculating
And a TCRRMSValue of (A)
When in use
And a TCRRMSAnd when the temperature is more than 2.5 ℃, the sulfur hexafluoride insulation electrical equipment is in an extremely overheated state, and heat points with the temperature range of K being more than 420 ℃ exist in the sulfur hexafluoride insulation electrical equipment.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method of classifying local overheating levels inside a SF6 gas insulated apparatus, comprising the steps of:
sampling and detecting sulfur hexafluoride decomposers in sulfur hexafluoride insulation electrical equipment for multiple times to obtain the content of the sulfur hexafluoride decomposers in the sulfur hexafluoride insulation electrical equipment at different time periods;
and establishing a content ratio relation between the overheating degree and the sulfur hexafluoride decomposers, and determining the overheating degree condition in the sulfur hexafluoride insulated electrical equipment based on the content ratio relation.
2. The method of dividing the degree of local overheating inside SF6 gas insulation equipment of claim 1, wherein said sulfur hexafluoride decomposition content includes SO2F2、SOF2、SOF4、SO2、H2Gas concentration content of S.
3. The method for dividing the local overheating degree inside SF6 gas insulated equipment of claim 1, wherein the interval time of sampling detection is a fixed value T.
4. The method for dividing the degree of local overheating inside SF6 gas insulation equipment as recited in claim 3, wherein establishing a content ratio relationship between the degree of overheating and said sulfur hexafluoride decomposition product, and determining the degree of overheating inside sulfur hexafluoride insulated electrical equipment based on said content ratio relationship comprises:
and at the time of t1, detecting no sulfur hexafluoride decomposition product in the sulfur hexafluoride insulation electrical equipment, wherein the sulfur hexafluoride insulation electrical equipment is in a normal state.
5. The method for dividing the local overheating degree inside SF6 gas insulation equipment as recited in claim 4, further comprising:
at time t2, when SO is detected in the sulfur hexafluoride decomposition product2F2、SOF2、SOF4、SO2Time, calculate
And a TCRRMSA value of (d);
when in use
And 0 < TCRRMSWhen the temperature is less than or equal to 0.05, the sulfur hexafluoride insulated electrical equipment is in a slight overheat state, wherein C (x)Representing the gas concentration content, lgC (x) representing the logarithm of the gas concentration content, TCRRMSIs composed of
Is determined.
6. The method of claim 5, wherein the SO in the decomposition products of sulfur hexafluoride at time t3 is divided into partial overheating degrees in SF6 gas insulation equipment2F2、SOF2、SOF4、SO2When the content of (b) is greater than t2, calculating
And a TCRRMSA value of (d);
when in use
And 0.05 < TCRRMSAnd when the temperature is less than or equal to 1, the sulfur hexafluoride insulation electrical equipment is in an overheat state.
7. The method for dividing the local overheating degree in SF6 gas insulation equipment as in claim 6, wherein H appears in sulfur hexafluoride decomposition product at time t42S, and SO2F2、SOF2、SOF4、SO2When the content of (b) is greater than t3, calculating
And a TCRRMSA value of (d);
when in use
And 1 < TCRRMSAnd when the temperature is less than or equal to 2.5 ℃, the sulfur hexafluoride insulation electric equipment is in a serious overheating state.
8. An SF6 gas insulated plant as claimed in claim 7The method for dividing the local overheating degree is characterized in that at the time of t5, SO in sulfur hexafluoride decomposition products2F2、SOF2、SOF4、SO2、H2When the content of S is more than t4, calculating
And a TCRRMSValue of (A)
When in use
And a TCRRMSAnd when the temperature is higher than 2.5 ℃, the sulfur hexafluoride insulated electrical equipment is in an extremely overheated state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090605.6A CN112213450A (en) | 2020-10-13 | 2020-10-13 | Method for dividing local overheating degree in SF6 gas insulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011090605.6A CN112213450A (en) | 2020-10-13 | 2020-10-13 | Method for dividing local overheating degree in SF6 gas insulation equipment |
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| CN112213450A true CN112213450A (en) | 2021-01-12 |
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| CN202011090605.6A Pending CN112213450A (en) | 2020-10-13 | 2020-10-13 | Method for dividing local overheating degree in SF6 gas insulation equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208013351U (en) * | 2017-09-26 | 2018-10-26 | 海南电网有限责任公司电力科学研究院 | Sulfur hexafluoride gas insulation equipment Superheated steam drier simulator |
| CN109375016A (en) * | 2018-10-31 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | Sulfur hexafluoride resolution characteristic test method at a temperature of different Superheated steam driers |
| CN111044859A (en) * | 2019-12-18 | 2020-04-21 | 国网北京市电力公司 | GIS equipment fault processing method, storage medium and equipment |
-
2020
- 2020-10-13 CN CN202011090605.6A patent/CN112213450A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208013351U (en) * | 2017-09-26 | 2018-10-26 | 海南电网有限责任公司电力科学研究院 | Sulfur hexafluoride gas insulation equipment Superheated steam drier simulator |
| CN109375016A (en) * | 2018-10-31 | 2019-02-22 | 国网重庆市电力公司电力科学研究院 | Sulfur hexafluoride resolution characteristic test method at a temperature of different Superheated steam driers |
| CN111044859A (en) * | 2019-12-18 | 2020-04-21 | 国网北京市电力公司 | GIS equipment fault processing method, storage medium and equipment |
Non-Patent Citations (2)
| Title |
|---|
| ZHUANG Y ET AL: "Effects of SF6 decomposition components and concentrations on the discharge faults and insulation defects in GIS equipment", 《SCI REP 》 * |
| 陈晓琳等: "GIS设备局部过热故障程度与SF6分解的关联特性", 《高压电器》 * |
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