CN105004630A - Method for measuring power grid icing volume density and porosity - Google Patents
Method for measuring power grid icing volume density and porosity Download PDFInfo
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- CN105004630A CN105004630A CN201510316623.4A CN201510316623A CN105004630A CN 105004630 A CN105004630 A CN 105004630A CN 201510316623 A CN201510316623 A CN 201510316623A CN 105004630 A CN105004630 A CN 105004630A
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Abstract
The invention discloses a method for measuring power grid icing volume density and porosity. The method comprises the following steps that 1, an icing sample is placed in a container, and the mass of the icing sample is measured as m<1>; 2, the icing sample is taken out of the container, a certain quantity of water is added to the container, and the mass of the water is measured as M<1>; 3, the icing sample is placed in the container, and after the sample is completely immersed in the water, the mass of the icing sample and the water is measured as M<2; 4, the water in the container in the step 3 is poured out fast, and the mass of the icing sample at this moment is measured as m<2>; 5, the true volume V<2> of the icing sample is calculated; 6, the volume V<1> of the icing sample with concave portions is calculated; 7, the icing volume density p<ti> is calculated; 8, the porosity P of the icing sample is calculated. The measured and calculated icing density and porosity are accurate, and the method is suitable for measurement of on-site ice taking personnel after local sampling.
Description
Technical field
The present invention relates to electrical network icing to measure and measuring method, be specifically related to the measuring method of a kind of electrical network icing volume density and porosity.
Background technology
Electrical network icing is the technical barrier of puzzlement countries in the world always, and the conductor galloping that icing causes, broken string, tower, the flashover even accident such as grid disconnection of falling, the safe operation of serious threat electric system, causes the massive losses of national economy and the people's livelihood.Along with the raising of transmission line of electricity electric pressure and the increase of fed distance, become increasingly complex by way of regional feature landforms, sea level elevation, weather conditions, atmospheric environment, icing situation and the icing form of zones of different there are differences, and therefore must seek the electrical network icing solution of differentiation for different regions.
Therefore, be to electrical network icing to the research of icing form, the basis of the especially correlative study of insulator chain icing flashover, is subject to the common concern of researchist; And icing volume density and porosity are as the important indicator distinguishing icing form and measurement icing degree, there is no the high measuring method with being easy to carry out execute-in-place in the wild of accuracy at present, making troubles to relevant research and investigation.
The main method of current measurement iced insulator is fluid-discharge therapy, but there is a large amount of pore due to icing inside, and when icing immerses in water or oil, capillary effect causes a large amount of aqueous waters to enter in ice, and cause the icing volume recorded less than normal, density is bigger than normal.According to definition, the reality that said method records is the real density after icing removing hole, and the volume density that undesired obtains.In order to address this problem, before measuring icing volume by fluid-discharge therapy, with polyvinylamine vinyl acetate film by icing Surface coating, liquid can be avoided to enter inside, but due to insulator or conductive line surfaces icing out-of-shape, overlay film is difficult to be coated on icing surface equably, and the space between overlay film and ice also can make the volume that records bigger than normal, and this method is also not suitable for operating in the wild in addition.
Summary of the invention
The invention provides high, simple and easy to use, the suitable field staff of a burst of accuracy and sample the electrical network icing volume density of rear In situ Measurement and the measuring method of porosity.
The technical solution used in the present invention is: the measuring method of a kind of electrical network icing volume density and porosity, comprises the following steps:
(1) get icing sample and be placed in container, measuring icing sample quality is m
1;
(2) take out icing sample from container, in container, add certain water gaging, the quality measuring water is M
1;
(3) icing sample is put into container, sample is immersed in after in water completely, the quality measuring icing sample and water is M
2;
(4) poured out by the water in step (3) container rapidly, measuring now icing sample quality is m
2;
(5) the true volume V of icing sample is calculated
2:
V
2=(M
2-M
1)/ρ
liquid
In formula: ρ
liquidfor the density of water;
(6) the volume V that icing sample comprises pore is calculated
1:
V
1=V
2+ (m
2-m
1)/ρ
liquid
(7) icing volume density ρ is calculated
body:
ρ
body=m
1/ V
1
(8) the porosity P of icing sample is calculated:
P＝1-V
2/V
1
In described step (1) ~ (4), measuring process temperature remains on 0 DEG C; In described step (2) ~ (4), the temperature of water remains within 0 DEG C ~ 0.5 DEG C.
As preferably, described step (1) ~ (4) measuring process is carried out in calm environment.
The invention has the beneficial effects as follows:
(1) the icing volume density that calculates of the present invention and porosity accurate;
(2) survey calculation of the present invention is simple, is suitable for on-the-spot sight match-maker person and samples rear measurement on the spot.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
A measuring method for electrical network icing volume density and porosity, (1) is got icing sample and is placed in container, and measuring icing sample quality is m
1;
(2) take out icing sample from container, in container, add certain water gaging, the quality measuring water is M
1;
(3) icing sample is put into container, sample is immersed in after in water completely, the quality measuring icing sample and water is M
2;
(4) poured out by the water in step (3) container rapidly, measuring now icing sample quality is m
2;
(5) the true volume V of icing sample is calculated
2:
V
2=(M
2-M
1)/ρ
liquid
In formula: ρ
liquidfor the density of water;
(6) the volume V that icing sample comprises pore is calculated
1:
V
1=V
2+ (m
2-m
1)/ρ
liquid
(7) icing volume density ρ is calculated
body:
ρ
body=m
1/ V
1
(8) the porosity P of icing sample is calculated:
P＝1-V
2/V
1
In step (1) ~ (4), measuring process temperature remains on 0 DEG C, and temperature remains on the frozen state that 0 DEG C can keep icing; In step (2) ~ (4), the temperature of water remains within 0 DEG C ~ 0.5 DEG C, and the icing keeping water temperature to prevent from putting within 0 DEG C ~ 0.5 DEG C melts or large quantity of moisture is frozen on icing sample, causes the error of measurement.
Take out sample in step (4) as far as possible rapidly, avoid the water immersed in sample kapillary to flow out from sample, cause the inaccurate of measurement; In step (1) ~ (4), measuring process should be tried one's best rapidly, avoids the ice-out on icing sample to cause the inaccurate of measurement.
Step (1) ~ (4) measuring process is carried out in calm environment, can prevent because wind-force causes the registration distortion of balance.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a measuring method for electrical network icing volume density and porosity, is characterized in that, comprises the following steps:
(1) get icing sample and be placed in container, measuring icing sample quality is m
1;
(2) take out icing sample from container, in container, add certain water gaging, the quality measuring water is M
1;
(3) icing sample is put into container, sample is immersed in after in water completely, the quality measuring icing sample and water is M
2;
(4) poured out by the water in step (3) container rapidly, measuring now icing sample quality is m
2;
(5) the true volume V of icing sample is calculated
2:
V
2=(M
2-M
1)/ρ
liquid
In formula: ρ
liquidfor the density of water;
(6) the volume V that icing sample comprises pore is calculated
1:
V
1=V
2+ (m
2-m
1)/ρ
liquid
(7) icing volume density ρ is calculated
body:
ρ
body=m
1/ V
1
(8) the porosity P of icing sample is calculated:
P＝1-V
2/V
1
In described step (1) ~ (4), measuring process temperature remains on 0 DEG C; In described step (2) ~ (4), the temperature of water remains within 0 DEG C ~ 0.5 DEG C.
2. the measuring method of a kind of electrical network icing volume density according to claim 1 and porosity, is characterized in that: described step (1) ~ (4) measuring process is carried out in calm environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316623.4A CN105004630A (en) | 2015-06-10 | 2015-06-10 | Method for measuring power grid icing volume density and porosity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316623.4A CN105004630A (en) | 2015-06-10 | 2015-06-10 | Method for measuring power grid icing volume density and porosity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105004630A true CN105004630A (en) | 2015-10-28 |
Family
ID=54377384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510316623.4A Pending CN105004630A (en) | 2015-06-10 | 2015-06-10 | Method for measuring power grid icing volume density and porosity |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030308A (en) * | 2018-07-02 | 2018-12-18 | 北京科技大学 | A method of quickly, simply measuring solid porosity |
| CN109752282A (en) * | 2019-02-28 | 2019-05-14 | 西安工程大学 | Icing sensor and its transmission line icing monitoring system and monitoring method of application |
| CN114295532A (en) * | 2022-03-09 | 2022-04-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing porosity measuring device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030308A (en) * | 2018-07-02 | 2018-12-18 | 北京科技大学 | A method of quickly, simply measuring solid porosity |
| CN109752282A (en) * | 2019-02-28 | 2019-05-14 | 西安工程大学 | Icing sensor and its transmission line icing monitoring system and monitoring method of application |
| CN114295532A (en) * | 2022-03-09 | 2022-04-08 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing porosity measuring device and method |
| CN114295532B (en) * | 2022-03-09 | 2022-06-03 | 中国空气动力研究与发展中心低速空气动力研究所 | Icing porosity measuring device and method |
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| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Yawei Inventor after: Zhang Xinghai Inventor after: Chen Hongbo Inventor before: Li Yawei Inventor before: Zhang Xinghai |
|
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| TA01 | Transfer of patent application right |
Effective date of registration: 20160817 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Electric Power Sciences Research Institute of Sichuan Electric Power Corporation Applicant after: STATE GRID SHANXI ELECTRIC POWER CO., LTD. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: Electric Power Sciences Research Institute of Sichuan Electric Power Corporation |
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Application publication date: 20151028 |