CN104977139A - Detection method and detection system for detecting leakage of inner cooling water of converter station converter valve - Google Patents
Detection method and detection system for detecting leakage of inner cooling water of converter station converter valve Download PDFInfo
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- CN104977139A CN104977139A CN201510395531.XA CN201510395531A CN104977139A CN 104977139 A CN104977139 A CN 104977139A CN 201510395531 A CN201510395531 A CN 201510395531A CN 104977139 A CN104977139 A CN 104977139A
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- converter valve
- cold water
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- inner cold
- liquid
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Abstract
The invention relates to a detection method and a detection system for detecting the leakage of the inner cooling water of a converter station converter valve. The method comprises the steps of (1) sealing the isotopic tracing liquid in a cold-water liquid in a converter valve to uniformly mix the isotopic tracing liquid with the cold-water liquid in the converter valve; (2) arranging a nuclear detection counter inside the valve hall of the converter station so as to detect the tracing material in the air surrounding the converter valve. The detection of the tracing material shows the leakage of the inner cooling water inside the converter valve around the counter. Compared with the prior art, the detection method and the detection system are simple and ingenious. The problem that the leakage of the converter station converter valve is difficult to be found out timely can be effectively solved. Meanwhile, the safe and reliable operation of the converter station is greatly facilitated.
Description
Technical field
The present invention relates to power equipment liquid coolant leak detection technology, especially relate to a kind of detection method for the leakage of current conversion station converter valve inner cold water and system.
Background technology
In recent years, HVDC Transmission Technology is applied in actual power transmission engineering more and more widely, and wherein converter valve is the nucleus equipment of direct current transportation.The cooling of converter valve is dispelled the heat by inner cold water, but due to inner cold water pipe long-play and be in complicated strong electromagnetic environment, inner cold water seepage causes the accident of converter valve short-circuit fire to happen occasionally, thus causes heavy losses.Although the valve Room is built with fire pole early warning device, can only leaks in rear discovery on fire and cause short-circuit fire, can not find to leak trouble saving generation in advance.
Therefore, research and develop the on-line monitoring equipment that a kind of energy Timeliness coverage converter valve inner cold water is revealed, whether examinations inner cold water closed circuit exists leakage, brings great help by the safe and reliable operation of current conversion station.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and provide a kind of for current conversion station converter valve inner cold water reveal detection method and system.
Object of the present invention can be achieved through the following technical solutions:
For the detection method that current conversion station converter valve inner cold water is revealed, it is characterized in that, comprise the following steps:
1) tagging hydraulic seal is placed in converter valve inner cold water liquid and mixes with inner cold water uniform liquid;
2) nuclear detection counter being arranged at described converter station valve hall inner, for detecting the tracer material in converter valve surrounding air, once detect tracer material, namely detecting that inner cold water leakage has appearred in the converter valve parts near counter.
Described nuclear detection counter is Geiger-Miller type counter.
Described nuclear detection counter number is no less than 4.
Described tagging liquid is HTO.
A kind of detection system revealed for current conversion station converter valve inner cold water, it is characterized in that, comprise tagging liquid, nuclear detection counter, described tagging hydraulic seal is placed in converter valve inner cold water liquid and mixes with inner cold water uniform liquid, and it is inner that described nuclear detection counter is arranged at described converter station valve hall.
Compared with prior art, beneficial effect of the present invention is: the present invention is simply ingenious, efficiently solves current conversion station converter valve and leaks and be difficult to the problem of Timeliness coverage, bring great help to the safe and reliable operation of current conversion station.And along with the enhancing day by day of science and technology, tagging instrument has had the portable unit of hand-held to put it into commercial operation, the detector of hand-held also necessarily can play huge effect in the repair based on condition of component of other equipment of transformer station in the future.Successful Application of the present invention inherently brings significant economic benefit and social benefit.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
The present invention includes and comprise tagging liquid, nuclear detection counter, tagging liquid sealing is placed in converter valve inner cold water liquid and mixes with inner cold water uniform liquid, and it is inner that nuclear detection counter is arranged at described converter station valve hall.Nuclear detection counter can be Geiger-Miller type counter, and its quantity is no less than 4.Described tagging liquid can be HTO.
Ultimate principle of the present invention utilizes in converter valve inner cold water loop to inject suitable tagging material, by preferred isotope detection counter, detect the tracer material in converter valve surrounding air, once detect tracer material, namely illustrate that inner cold water leakage has appearred in the converter valve parts near counter.
The radioactive nuclide that tagging utilizes and their compound, the chemical property between the corresponding common element existed with nature and compound thereof and biological property are identical, just have different nuclear physics character.Therefore, just can mark as one with isotope, utilize the nuclear physics character of radioactive isotope constantly release characteristic ray, just can follow the trail of it at any time in vivo or external position, quantity etc. with nuclear detector.Although stable isotope does not discharge ray, can utilize its difference to common corresponding isotopic quality, by mass spectrometer, gas chromatograph, the analytical instrument of quality such as nuclear magnetic resonance measure.Radioactive isotope and stable isotope all can be used as tracer agent.But stable isotope is lower as its sensitivity of tracer agent, and obtainable kind is few, costly, its range of application is restricted price; And not only highly sensitive as tracer agent with radioactive isotope, can 10 be reached
-14-10
-18gram level, measuring method is simple and easy to do, can be quantitative exactly, exactly the feature such as location.
Conventional radioactive isotope has carbon 14 and tritium etc. to launch the radioactive isotope of soft beta ray, and tritium is a kind of radioactive isotope of hydrogen, and symbol is T.Due to isotope effect, tritium generally exists with HTO.The physicochemical property of HTO and the physicochemical property of light water are about the same, and HTO can not cause any harm to equipment.β decay due to tritium only can release the electronics of high-speed mobile, can not penetrate human body, and just meeting is harmful therefore to only have a large amount of suction tritium, so do not worry the radiation problem of HTO, therefore HTO is best suited for being used in inner cold water as tracer agent.
For the current conversion station of conventional 3000MW capacity, the general assembly (TW) of converter valve inner cold water is approximately 5000Kg, and the weight of a water is approximately 0.1g, and the sensitivity of nuclear detection instrument is 10
-14g, therefore only need to add and a small amount of HTO, even one, once the inner cold water generation seepage of converter valve, HTO is necessarily had to leak, and can because the heating of converter valve and rapid evaporation, the sensitivity of nuclear detection instrument enough finds that there is the existence of tritium, and the difference measuring concentration according to the detection instrument of different azimuth can judge the orientation of leak source, thus find to leak hidden danger in the very first time, avoid leaking serious after the converter valve fire trip accident that causes.
Beneficial effect of the present invention is: the present invention is simply ingenious, efficiently solves current conversion station converter valve and leaks and be difficult to the problem of Timeliness coverage, bring great help to the safe and reliable operation of current conversion station.And along with the enhancing day by day of science and technology, tagging instrument has had the portable unit of hand-held to put it into commercial operation, the detector of hand-held also necessarily can play huge effect in the repair based on condition of component of other equipment of transformer station in the future.Successful Application of the present invention inherently brings significant economic benefit and social benefit.
It should be noted that; the above embodiments are all in order to the present invention instead of restriction the present invention are described; also suitable external circuit can be increased or control assembly optimizes its performance etc. further; obviously; many technical characteristics of the present invention are interchangeable or omit; the setting of many elements can change as required, and the "a" or "an" before element of the present invention is not got rid of and occurred multiple this element, and these changes all should belong to protection scope of the present invention.
Claims (5)
1., for the detection method that current conversion station converter valve inner cold water is revealed, it is characterized in that, comprise the following steps:
1) tagging hydraulic seal is placed in converter valve inner cold water liquid and mixes with inner cold water uniform liquid;
2) nuclear detection counter being arranged at described converter station valve hall inner, for detecting the tracer material in converter valve surrounding air, once detect tracer material, namely detecting that inner cold water leakage has appearred in the converter valve parts near counter.
2. a kind of detection method revealed for current conversion station converter valve inner cold water according to claim 1, it is characterized in that, described nuclear detection counter is Geiger-Miller type counter.
3. a kind of detection method revealed for current conversion station converter valve inner cold water according to claim 1 and 2, it is characterized in that, described nuclear detection counter number is no less than 4.
4. a kind of detection method revealed for current conversion station converter valve inner cold water according to claim 1, it is characterized in that, described tagging liquid is HTO.
5. the detection system revealed for current conversion station converter valve inner cold water as claimed in claim 1, it is characterized in that, comprise tagging liquid, nuclear detection counter, described tagging hydraulic seal is placed in converter valve inner cold water liquid and mixes with inner cold water uniform liquid, and it is inner that described nuclear detection counter is arranged at described converter station valve hall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510395531.XA CN104977139A (en) | 2015-07-07 | 2015-07-07 | Detection method and detection system for detecting leakage of inner cooling water of converter station converter valve |
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| CN201510395531.XA CN104977139A (en) | 2015-07-07 | 2015-07-07 | Detection method and detection system for detecting leakage of inner cooling water of converter station converter valve |
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| CN104977139A true CN104977139A (en) | 2015-10-14 |
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| CN201510395531.XA Pending CN104977139A (en) | 2015-07-07 | 2015-07-07 | Detection method and detection system for detecting leakage of inner cooling water of converter station converter valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612652A (en) * | 2018-12-12 | 2019-04-12 | 云南电网有限责任公司电力科学研究院 | A kind of N2Insulated switch cabinet gas leak detection method |
| CN110702331A (en) * | 2019-11-14 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司大理局 | Water leakage detection method, device and equipment based on converter station valve internal cooling system |
| CN112908957A (en) * | 2019-11-19 | 2021-06-04 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Intelligent regulation and control system in converter station valve hall |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109612652A (en) * | 2018-12-12 | 2019-04-12 | 云南电网有限责任公司电力科学研究院 | A kind of N2Insulated switch cabinet gas leak detection method |
| CN110702331A (en) * | 2019-11-14 | 2020-01-17 | 中国南方电网有限责任公司超高压输电公司大理局 | Water leakage detection method, device and equipment based on converter station valve internal cooling system |
| CN112908957A (en) * | 2019-11-19 | 2021-06-04 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Intelligent regulation and control system in converter station valve hall |
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Application publication date: 20151014 |