TWI760757B - Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system - Google Patents
Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system Download PDFInfo
- Publication number
- TWI760757B TWI760757B TW109118016A TW109118016A TWI760757B TW I760757 B TWI760757 B TW I760757B TW 109118016 A TW109118016 A TW 109118016A TW 109118016 A TW109118016 A TW 109118016A TW I760757 B TWI760757 B TW I760757B
- Authority
- TW
- Taiwan
- Prior art keywords
- gas
- ozone
- concentration
- internal ambient
- rotary machine
- Prior art date
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
測定從旋轉機器(1)的定子線圈(7)產生的氮氧化物的濃度之氣體檢測裝置(21)。具備:氮氧化物用吸引裝置(25),其係吸引旋轉機器的內部環境氣體;以及氮氧化物濃度檢測部(27),其係連接在旋轉機器與氮氧化物用吸引裝置之間,以通過內部環境氣體的方式來檢測內部環境氣體所包含的氮氧化物的濃度;其中,在氮氧化物濃度檢測部與旋轉機器之間,連接有從通過內部的內部環境氣體吸收臭氧之臭氧吸收過濾器(28)。A gas detection device (21) for measuring the concentration of nitrogen oxides generated from a stator coil (7) of a rotating machine (1). It is provided with: a suction device (25) for nitrogen oxides, which sucks the internal ambient gas of the rotating machine; and a nitrogen oxide concentration detection part (27), which is connected between the rotating machine and the suction device for nitrogen oxides, so as to The concentration of nitrogen oxides contained in the internal ambient gas is detected by means of the internal ambient gas; wherein, between the nitrogen oxide concentration detection unit and the rotating machine, an ozone absorption filter for absorbing ozone from the internal ambient gas passing through is connected. device (28).
Description
本發明有關在監視高壓旋轉機器等旋轉機器的定子線圈的半導電層的劣化之際所使用的旋轉機器的氣體檢測裝置、氣體檢測方法及定子線圈劣化監視系統。The present invention relates to a gas detection device, a gas detection method, and a stator coil deterioration monitoring system for a rotating machine used for monitoring deterioration of a semiconductive layer of a stator coil of a rotating machine such as a high-voltage rotating machine.
高壓旋轉機器等旋轉機器的定子線圈具備:捆了複數根施加了絕緣被覆膜的導線之線材線圈、用雲母帶捲繞線材線圈來做設置之絕緣層、以及半導電層;該定子線圈被收容在定子鐵心的槽並接線,這些東西是藉由熱固性樹脂來被含浸、硬化。
定子線圈是在運轉中受到電性的、熱的、機械的應力的緣故,絕緣層與半導電層容易引起長年劣化。
定子線圈的絕緣層的劣化,係因為在絕緣層中的微小的孔隙中產生的部分放電而經年累月侵蝕,之後突然一下子導致機器故障(絕緣破壞)。在此,檢測運作中的旋轉機器的部分放電的產生位準,在故障前敦促維修或更新之部分放電監視技術係持續開發著(例如,專利文獻1及2)。A stator coil of a rotating machine such as a high-voltage rotating machine is provided with a wire coil in which a plurality of conductors with an insulating coating are bundled, an insulating layer provided by winding the wire coil with mica tape, and a semiconductive layer; the stator coil is It is accommodated in the slot of the stator core and wired, and these are impregnated and hardened with thermosetting resin.
The stator coil is subjected to electrical, thermal, and mechanical stress during operation, and the insulating layer and the semiconducting layer are likely to deteriorate over time.
Deterioration of the insulating layer of the stator coil is caused by partial discharge generated in minute pores in the insulating layer, which is eroded over time, and then suddenly causes a machine failure (insulation breakdown). Here, a partial discharge monitoring technology that detects the occurrence level of partial discharge of an operating rotating machine and prompts maintenance or update before failure is continuously developed (for example,
專利文獻1乃是從旋轉機器的內部環境氣體中,測定一氧化碳、二氧化氮、臭氧的濃度,並分析測定結果,藉此,探測轉子線圈的絕緣層的劣化,進行旋轉機器的預防保養之技術。
專利文獻2乃是從部分放電電荷量與臭氧的產生濃度的關係來測定臭氧,藉此,檢測不受到高頻干擾的影響而在旋轉機器的線圈產生的部分放電的產生狀況,並監視轉子線圈的絕緣層的劣化之方法。
另一方面,定子線圈的半導電層係因為在絕緣層與半導電層之間的微小的孔隙所產生的部分放電而劣化。半導電層劣化的話,就會產生部分放電,會促進半導電層的劣化。在此,在包含定子線圈的絕緣層及半導電層之整體下產生部分放電,但是,在本案中,把隨半導電層的劣化在定子線圈表面產生的放電稱為「表面放電」。 因為在半導電層產生的表面放電促進劣化的話,在此之際產生臭氧(O3)、氮氧化物(NO、NO2)之腐蝕性氣體,腐蝕性氣體與空氣中的水分結合產生硝酸。經此,招致旋轉機器的金屬構造零件的鏽或腐蝕所致之強度降低,引起二次的故障,於旋轉機器的安定運轉會有招致障礙之虞。On the other hand, the semiconducting layer of the stator coil is degraded due to partial discharge caused by minute pores between the insulating layer and the semiconducting layer. When the semiconducting layer is degraded, partial discharge occurs and the degradation of the semiconducting layer is accelerated. Here, partial discharge occurs under the entire insulating layer including the stator coil and the semiconductive layer, but in this case, the discharge generated on the surface of the stator coil with the deterioration of the semiconductive layer is called "surface discharge". Since the surface discharge generated in the semiconductive layer promotes the deterioration, corrosive gases such as ozone (O3) and nitrogen oxides (NO, NO2) are generated at this time, and the corrosive gases combine with moisture in the air to generate nitric acid. As a result, the strength reduction due to rust or corrosion of the metal structural parts of the rotating machine is caused, and secondary failures are caused, and the stable operation of the rotating machine may be hindered.
半導電層的劣化係隨著表面放電的緣故,可以藉由從以往進行的部分放電試驗來探測劣化的傾向,但是,在絕緣層中產生的部分放電的這一方為支配性的情況下,判別半導電層的劣化是有困難。 為此,半導電層的劣化的評量,係以使旋轉機器的運轉停止,拔出轉子,藉由目視定子線圈來進行檢修的方法為主。為了檢修半導電層的劣化,取下旋轉機器的框架,拔出轉子,可以用目視檢修定子線圈的狀態是為必要。但是,高壓旋轉機器為發電所或工廠中的主要機器,運轉停止所致之半導電層的劣化的評量,係不被期望在工廠的操作中的。 [先前技術文獻] [專利文獻]The degradation of the semiconductive layer is caused by surface discharge, and the tendency of degradation can be detected by the partial discharge test conducted in the past. However, when the partial discharge generated in the insulating layer is dominant, it can be determined. Deterioration of the semiconducting layer is difficult. For this reason, the evaluation of the deterioration of the semiconductive layer is mainly based on the method of stopping the operation of the rotating machine, pulling out the rotor, and inspecting the stator coil by visual inspection. In order to check the deterioration of the semiconducting layer, it is necessary to remove the frame of the rotating machine, pull out the rotor, and visually check the state of the stator coil. However, since high-voltage rotating equipment is the main equipment in a power plant or a factory, the evaluation of the deterioration of the semiconductive layer due to the stoppage of operation is not expected in the operation of the factory. [Prior Art Literature] [Patent Literature]
[專利文獻1]日本特表2012-503463號專利公報 [專利文獻2]日本特開2018-200179號專利公報[Patent Document 1] Japanese Patent Publication No. 2012-503463 [Patent Document 2] Japanese Patent Laid-Open No. 2018-200179
[發明欲解決之課題][The problem to be solved by the invention]
前述的專利文獻1及2的技術,乃是監視旋轉機器的轉子線圈的絕緣體的劣化或部分放電的技術,用目視檢修以外的方法來評量定子線圈的半導電層的劣化的手法,還尚未確立出。
為此,監視定子線圈的半導電層的劣化之技術,係在旋轉機器的安定運轉中為重要,如以往的目視檢修般不使旋轉機器停止而在旋轉機器運轉的狀態(線上)下,來評量定子線圈的半導電層的劣化之手法是為必要。The techniques of the
在此,本發明係有鑑於上述情事而為之創作,其目的在於提供一種旋轉機器的氣體檢測裝置、氣體檢測方法及定子線圈劣化監視系統,其係以監視旋轉機器的定子線圈的半導電層的劣化的方式而可以使旋轉機器的安定運轉持續。 [解決課題之手段]The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a gas detection device, a gas detection method, and a stator coil deterioration monitoring system for a rotating machine, which monitor a semiconductive layer of a stator coil of a rotating machine. The stable operation of the rotating machine can be continued in the manner of deterioration. [Means of Solving Problems]
為了達成上述目的,有關本發明的其中一樣態之旋轉機器的氣體檢測裝置,乃是一種測定從旋轉機器的定子線圈產生的氮氧化物的濃度之氣體檢測裝置,具備:氮氧化物用吸引裝置,其係吸引旋轉機器的內部環境氣體;以及氮氧化物濃度檢測部,其係連接在旋轉機器與氮氧化物用吸引裝置之間,以通過內部環境氣體的方式來檢測內部環境氣體所包含的氮氧化物的濃度;其中,在氮氧化物濃度檢測部與旋轉機器之間,連接有從通過內部的內部環境氣體吸收臭氧之臭氧吸收過濾器。In order to achieve the above object, a gas detection device for a rotary machine according to one aspect of the present invention is a gas detection device for measuring the concentration of nitrogen oxides generated from a stator coil of a rotary machine, and includes: a suction device for nitrogen oxides , which sucks the internal ambient gas of the rotating machine; and a nitrogen oxide concentration detection unit, which is connected between the rotating machine and the nitrogen oxide suction device, to detect the amount contained in the internal ambient gas by means of the internal ambient gas The concentration of nitrogen oxides; wherein, between the nitrogen oxide concentration detection unit and the rotating machine, an ozone absorption filter that absorbs ozone from the internal ambient gas passing through is connected.
而且,有關本發明的其中一樣態之旋轉機器的氣體檢測方法,乃是一種測定從旋轉機器的定子線圈產生的臭氧及氮氧化物的濃度之氣體檢測方法,在旋轉機器連接臭氧濃度檢測部,以使旋轉機器的內部環境氣體通過臭氧濃度檢測部的方式,臭氧濃度檢測部檢測內部環境氣體所包含的臭氧的濃度;在旋轉機器連接氮氧化物濃度檢測部,以使旋轉機器的內部環境氣體通過氮氧化物濃度檢測部的方式,氮氧化物濃度檢測部檢測內部環境氣體所包含的氮氧化物的濃度;在氮氧化物濃度檢測部與旋轉機器之間,連接有從通過內部的前述內部環境氣體吸收臭氧之臭氧吸收過濾器。Furthermore, a gas detection method for a rotary machine according to one aspect of the present invention is a gas detection method for measuring the concentrations of ozone and nitrogen oxides generated from a stator coil of a rotary machine, wherein an ozone concentration detection unit is connected to the rotary machine, The ozone concentration detection unit detects the concentration of ozone contained in the internal ambient gas in such a way that the internal ambient gas of the rotating machine passes through the ozone concentration detection unit; The nitrogen oxide concentration detection unit detects the concentration of nitrogen oxides contained in the internal ambient gas by means of a nitrogen oxide concentration detection unit; between the nitrogen oxide concentration detection unit and the rotating machine, the above-mentioned internal passage from the inside is connected. Ozone absorbing filter for absorbing ozone from ambient gas.
更進一步,有關本發明的其中一樣態之旋轉機器中的定子線圈劣化監視系統具備:氣體檢測裝置、以及劣化監視部;其中,氣體檢測裝置具備:氮氧化物用吸引裝置,其係吸引旋轉機器的內部環境氣體;氮氧化物濃度檢測部,其係連接在旋轉機器與氮氧化物用吸引裝置之間,以通過內部環境氣體的方式來檢測內部環境氣體所包含的氮氧化物的濃度;臭氧吸收過濾器,其係連接在氮氧化物濃度檢測部與旋轉機器之間,從通過內部的內部環境氣體吸收臭氧;臭氧用吸引裝置,其係吸引旋轉機器的內部環境氣體;以及臭氧濃度檢測部,其係連接在旋轉機器與前述臭氧用吸引裝置之間,以通過前述內部環境氣體的方式來檢測該內部環境氣體所包含的臭氧的濃度;其中,該劣化監視部係根據用氣體檢測裝置檢測到的臭氧(或者是氮氧化物,或者是臭氧及氮氧化物)的濃度來判定半導電層的侵蝕進展的程度,判定侵蝕進展到半導電層劣化時,報知定子線圈的狀態。 [發明效果]Furthermore, a stator coil deterioration monitoring system in a rotating machine according to one aspect of the present invention includes: a gas detection device, and a deterioration monitoring unit; wherein the gas detection device includes: a suction device for nitrogen oxides, which suctions the rotating machine The nitrogen oxide concentration detection part is connected between the rotating machine and the suction device for nitrogen oxides, and detects the concentration of nitrogen oxides contained in the internal environment gas by means of the internal ambient gas; ozone an absorption filter, which is connected between the nitrogen oxide concentration detection unit and the rotating machine, and absorbs ozone from the internal ambient gas passing through the inside; an ozone suction device that sucks the internal ambient gas of the rotating machine; and the ozone concentration detection unit , which is connected between the rotating machine and the aforementioned ozone suction device to detect the concentration of ozone contained in the internal ambient gas by passing through the aforementioned internal ambient gas; wherein, the deterioration monitoring unit is detected by a gas detection device according to the The concentration of the obtained ozone (or nitrogen oxides, or both ozone and nitrogen oxides) is used to determine the degree of progress of the erosion of the semiconductive layer, and when it is judged that the erosion progresses to the extent that the semiconductive layer is degraded, the state of the stator coil is reported. [Inventive effect]
根據有關本發明的旋轉機器的氣體檢測裝置、氣體檢測方法及定子線圈劣化監視系統,可以監視旋轉機器的定子線圈的半導電層的劣化來持續旋轉機器的安定運轉。According to the gas detection device, the gas detection method, and the stator coil deterioration monitoring system for a rotary machine according to the present invention, it is possible to monitor the deterioration of the semiconductive layer of the stator coil of the rotary machine to continue stable operation of the rotary machine.
接著,參閱圖面,說明本發明的第1實施方式。在以下的圖面的記載中,對相同或是類似的部分賦予相同或是類似的元件符號。但是,圖面為示意表示,應留意厚度與平面尺寸的關係、各層的厚度的比例等是與現實上相異。因此,具體的厚度或尺寸應參酌以下的說明做判斷。而且,當然在各圖面相互之間亦可含有相互的尺寸的關係或比例不同的部分。 而且,以下表示的第1實施方式,乃是例示出用於具體化本發明的技術的思想的裝置或方法,本發明技術的思想並不特定在下述構成零件的材質、形狀、構造、配置等。本發明的技術的思想係在申請專利範圍記載的請求項所規定的技術範圍內,可以施加種種的變更。Next, referring to the drawings, a first embodiment of the present invention will be described. In the description of the following drawings, the same or similar reference numerals are assigned to the same or similar parts. However, the drawings are schematic representations, and it should be noted that the relationship between the thickness and the plane size, the ratio of the thickness of each layer, and the like are different from the actual ones. Therefore, the specific thickness or size should be judged with reference to the following description. In addition, it is needless to say that parts having different dimensional relationships and ratios may be included between the drawings. In addition, the first embodiment shown below is an example of a device or method for embodying the technical idea of the present invention, and the technical idea of the present invention is not specific to the material, shape, structure, arrangement, etc. of the following components . The technical idea of the present invention is within the technical scope defined by the claims described in the scope of claims, and various modifications can be added.
[旋轉機器的構成]
圖1為表示在有關本發明的第1實施方式所使用的旋轉機器1。
旋轉機器1具備:機器本體2、以及覆蓋該機器本體2的外周圍之機器框架3。
機器本體2以轉子4以及定子5所構成。
轉子4具備:在形成在機器框架3的兩端之端板3a及3b介隔著軸承(未圖示)支撐成自由旋轉之旋轉軸6、以及被固定在旋轉軸6之轉子線圈7。
定子5具備:在轉子線圈7的外周圍介隔著規定的間隙而對向之圓筒形狀的定子鐵心8、以及形成在定子鐵心8的內周圍面之被收容在複數個槽9之定子線圈10。
圖2為表示被收容在定子鐵心8的槽9的定子線圈10之圖。該定子線圈10具備:捆了複數根施加了絕緣被覆膜的導線11之線材線圈12、用雲母帶等捲繞線材線圈12的外周圍之絕緣層13、以及把熱固性樹脂含浸到絕緣層的周圍並硬化而做設置之半導電層14。這些都用楔15被收容到槽9內部並接線,並且,藉由熱固性樹脂來含浸、硬化。
從三相纜線(未圖示)供電到定子線圈10。[Construction of Rotary Machine]
FIG. 1 shows a
[旋轉機器的定子線圈劣化監視系統]
圖3為表示第1實施方式的旋轉機器1的定子線圈劣化監視系統20。
定子線圈劣化監視系統20具備:測定因為半導電層14的劣化所致之表面放電所產生的臭氧(O3
)、氮氧化物(NO、NO2
)的濃度之作為氣體檢測裝置的濃度測定部21、記錄用濃度測定部21測定出的臭氧、氮氧化物的測定資料之測定資料記錄部22、根據用測定資料記錄部22記錄到的測定資料來進行定子線圈10的劣化監視之劣化監視部23、以及顯示劣化監視部23中旋轉機器1的監視位準之顯示部24。[Stator Coil Deterioration Monitoring System of Rotating Machine] FIG. 3 shows a stator coil
濃度測定部21係如圖4表示,具備:第1氣體吸引裝置25及第2氣體吸引裝置26、連接在第1氣體吸引裝置25與旋轉機器1之間之氮氧化物檢測管27、連接在氮氧化物檢測管27及旋轉機器1之間之臭氧吸收過濾器28、以及連接在第2氣體吸引裝置26及旋轉機器1之間之臭氧檢測管29。
臭氧檢測管29係在密閉的管狀容器中,收納有會與臭氧氣體反應而變色的藥劑,與旋轉機器1的內部環境氣體所包含的臭氧反應而變色,根據其變色的程度來測定臭氧的濃度。
氮氧化物檢測管27係在密閉的管狀容器中,收納有會與氮氧化物反應而變色的藥劑,與旋轉機器1的內部環境氣體所包含的氮氧化物反應而變色,根據其變色的程度來測定氮氧化物的濃度。
臭氧吸收過濾器28係在密閉的管狀容器中,收納有鐵、或者是鋁等具有吸收或是分解臭氧的性質之材料。As shown in FIG. 4 , the
接著,說明有關濃度測定部21的動作。
驅動第1氣體吸引裝置25就會吸引旋轉機器1的內部環境氣體,通過臭氧吸收過濾器28、氮氧化物檢測管27,通過這些的氣體從第1氣體吸引裝置25排出到外部。此時,第1氣體吸引裝置25係對通過氮氧化物檢測管27的內部環境氣體調整到最佳的流速及累計流量,可以高精度地進行氮氧化物(NO、NO2)的濃度檢測。而且,從通過臭氧吸收過濾器28的內部環境氣體吸收臭氧,僅含有氮氧化物的內部環境氣體通過氮氧化物檢測管27,根據氮氧化物檢測管27的變色的程度來測定氮氧化物的濃度。
而且,驅動第2氣體吸引裝置26就會吸引旋轉機器1的內部環境氣體,通過臭氧檢測管29,通過了臭氧檢測管29的氣體從第2氣體吸引裝置26排出到外部。此時,第2氣體吸引裝置26係對通過臭氧檢測管29的內部環境氣體調整到最佳的流速及累計流量,可以高精度進行臭氧的濃度檢測,根據該臭氧檢測管29的變色的程度來測定臭氧的濃度。Next, the operation of the
接著,用濃度測定部21的臭氧檢測管29測定出的臭氧的濃度(臭氧濃度測定值)OC、以及用氮氧化物檢測管27測定出的氮氧化物的濃度(氮氧化物濃度測定值)NC,係被記錄到測定資料記錄部22。
接著,圖3所示的定子線圈劣化監視系統20的劣化監視部23,係根據用濃度測定部21測定出的臭氧濃度及氮氧化物來進行定子線圈10的半導電層14的侵蝕進展性、壽命之各種判斷。劣化監視部23包含:以微計算機等的演算處理裝置所構成的情況、或是作業員手動進行測定、資料處理的一部分的情況。參閱圖2,說明有關劣化監視部23所進行的劣化監視處理。Next, the concentration of ozone (measured ozone concentration value) OC measured by the
[劣化監視部所進行的劣化監視處理]
該劣化監視處理係首先,在步驟ST1,讀入記憶在測定資料記錄部22的臭氧濃度測定值OC、以及氮氧化物濃度測定值NC,然後轉移到步驟ST2。
在步驟ST2,根據氮氧化物的濃度判定定子線圈10的半導電層14的侵蝕程度。在該判定下,是根據氮氧化物濃度測定值NC是否為立即應對位準閾值NTS以上來判定。接著,NC≧NTS時,判斷為進展到一定要交換定子線圈10的程度之半導電層14的侵蝕,轉移到步驟ST3,把「定子線圈的交換為必要」的要旨顯示到顯示部24,然後結束劣化監視處理。另一方面,步驟ST2中,在NC<NTS時,轉移到步驟ST4。
在步驟ST4,根據臭氧的濃度判定定子線圈10的半導電層14的侵蝕程度。在該判定下,是根據臭氧濃度測定值OC是否為立即應對位準閾值OT3S以上來判定。接著,OC≧OT3S時,判斷為進展到一定要交換定子線圈10的程度之半導電層14的侵蝕,轉移到步驟ST3,把「定子線圈的交換為必要」的要旨顯示到顯示部24,然後結束劣化監視處理。另一方面,步驟ST4中,在OC<OT3S時,轉移到步驟ST5。[Deterioration monitoring processing by the deterioration monitoring unit]
In this deterioration monitoring process, first, in step ST1, the ozone concentration measurement value OC and the nitrogen oxide concentration measurement value NC stored in the measurement
也在步驟ST5,根據臭氧的濃度判定定子線圈10的半導電層14的侵蝕程度。在該判定下,是根據臭氧濃度測定值OC是否為警戒位準閾值OT2S以上來判定。在此,警戒位準閾值OT2S乃是比立即應對位準閾值OT3S還小的值。接著,OC≧OT2S時,半導電層14的侵蝕為徐徐地進展的緣故,所以判斷定子線圈10的交換的檢討為必要,轉移到步驟ST3,把「警戒位準(定子線圈交換的檢討為必要」的要旨顯示到顯示部24,然後結束劣化監視處理。另一方面,步驟ST5中,在OC<OT2S時,轉移到步驟ST7。
也在步驟ST7,根據臭氧的濃度判定定子線圈10的半導電層14的侵蝕程度。在該判定下,是根據臭氧濃度測定值OC是否為需要監視位準閾值OT1S以上來判定。在此,需要監視位準閾值OT1S乃是比警戒位準閾值OT2S還小的值。接著,OC≧OT1S時,半導電層14正在侵蝕的緣故,所以判斷定子線圈10的補修為必要,轉移到步驟ST8,把「需要監視位準(定子線圈交換的補修檢討為必要」的要旨顯示到顯示部24,然後結束劣化監視處理。另一方面,步驟ST5中,OC<OT1S時,結束劣化監視處理。Also in step ST5, the degree of erosion of the
接著,有關第1實施方式的旋轉機器的定子線圈劣化監視系統20的動作,參閱圖3至圖7說明之。
在此,圖6為以實驗值表示定子線圈10的半導電層14因為表面放電的產生而侵蝕進展的程度(侵蝕面積的變化)、以及因為半導電層14的侵蝕程度而變化的臭氧濃度之關係的圖。
在本實施方式中,於圖6中,把在半導電層14的初始階段的侵蝕也就是侵蝕面積S1時產生的臭氧濃度,作為前述的劣化監視部23所進行的劣化監視處理的需要監視位準閾值OT1S。而且,於圖5中,把在半導電層14的中期階段的侵蝕也就是侵蝕面積S2(S2>S1)時產生的臭氧濃度,作為劣化監視處理的警戒位準閾值OT2S。更進一步,而且,於圖5中,把在半導電層14的末期階段的侵蝕也就是侵蝕面積S3(S3>S2)時產生的臭氧濃度,作為劣化監視處理的立即應對位準OT3S。Next, the operation of the stator coil
定子線圈劣化監視系統20係定期使用濃度測定部21,進行旋轉機器1的內部環境氣體中的臭氧、氮氧化物的濃度測定。此時,臭氧、氮氧化物的採集位置,係只要是貫通旋轉機器1的機器框架3的螺栓的孔或給排氣用的通氣口部分等之可以直接採集內部環境氣體的地方,都可以選擇任意的場所來設置濃度測定部21的臭氧吸收過濾器28、臭氧檢測管29。
驅動濃度測定部21的第1氣體吸引裝置25就會吸引旋轉機器1的內部環境氣體,通過臭氧吸收過濾器28、氮氧化物檢測管27。從通過臭氧吸收過濾器28的內部環境氣體吸收臭氧的緣故,僅含有氮氧化物的內部環境氣體通過氮氧化物檢測管27,氮氧化物檢測管27係高精度地測定氮氧化物的濃度。而且,驅動第2氣體吸引裝置26就會吸引旋轉機器1的內部環境氣體而通過臭氧檢測管29,臭氧檢測管29測定臭氧的濃度。The stator coil
圖7為表示旋轉機器1的運轉時間的經過,以及在旋轉機器1的內部產生的臭氧、氮氧化物的濃度的變化之圖。
在旋轉機器1的定子線圈10的絕緣層13的劣化之下,在微小的孔隙內產生部分放電,劣化進行的話微小孔隙的大小或數量就會增加,部分放電的強度或產生量會增加。在絕緣層13的微小的孔隙內產生的部分放電,係被形成定子線圈10的雲母帶或熱固性樹脂封閉的緣故,因為部分放電所產生出的臭氧或氮氧化物之氣體,不會漏出到旋轉機器1的內部環境氣體。
相對於此,在半導電層14的劣化下,因為表面放電而半導電層14被侵蝕、消失。侵蝕消失掉的半導電層放電的劣化進行的話,就會增加侵蝕消失掉的半導電層的表面積,表面放電的產生量會增加。在定子線圈10的表面,流動冷卻風,冷卻風循環在旋轉機器1的內部。為此,因為半導電層14的劣化所致之表面放電所產生出的臭氧或氮氧化物,係乘著冷卻風循環在旋轉機器1的內部環境氣體中。FIG. 7 is a graph showing the elapse of the operation time of the
如圖7表示,因為旋轉機器1的運轉時間的增大而更加侵蝕半導電層14的話,臭氧就會徐徐地產生而濃度增大。但是,氮氧化物係因為半導電層14在末期階段的侵蝕所產生,濃度會急遽增大。
圖7中,在旋轉機器1的運轉時間的初始下,在定子線圈10的半導電層14不產生表面放電,侵蝕尚無進展。
接著,旋轉機器1的運轉時間增大,在定子線圈10的半導電層14產生表面放電而進展初始階段的侵蝕。此時,根據定期的濃度測定部21的臭氧、氮氧化物的濃度測定,劣化監視部23係判斷臭氧濃度OC為需要監視位準閾值OT1S以上的話,定子線圈10的交換的補修檢討就為必要,並在顯示部24中顯示「需要監視位準」(步驟ST7、步驟ST8)。As shown in FIG. 7 , when the
而且,旋轉機器1的運轉時間更進一步增大,因為半導電層14的表面放電的產生,進展到中期階段的侵蝕。此時,劣化監視部23係判斷臭氧濃度OC為警戒位準閾值OT2S以上的話,定子線圈10的交換的檢討就為必要,並在顯示部24中顯示「警戒位準」(步驟ST5、步驟ST6)。
接著,旋轉機器1的運轉時間更進一步增大,半導電層14達到末期階段的侵蝕的話,劣化監視部23係判斷臭氧濃度OC為立即應對位準閾值OT3S以上,定子線圈10的交換就為必要,並在顯示部24中顯示「立即應對位準」(步驟ST4、步驟ST3)。
在此,半導電層14達到末期階段的侵蝕的話,劣化監視部23係判斷氮氧化物濃度NC為立即應對位準閾值NTS以上也就是,定子線圈10的交換就為必要,並在顯示部24中顯示「立即應對位準」(步驟ST2、步驟ST3)。Furthermore, the operation time of the
[定子線圈劣化監視系統的效果]
說明有關第1實施方式的旋轉機器的定子線圈劣化監視系統20的效果。
首先,說明有關構成定子線圈劣化監視系統20的濃度測定部21的效果。
濃度測定部21係以第1氣體吸引裝置25及第2氣體吸引裝置26的吸引動作,使旋轉機器1的內部環境氣體通過到氮氧化物檢測管27及臭氧檢測管29,以這些的變色程度來測定濃度的緣故,可以圖求測定的簡便化。
接著,在旋轉機器1的內部環境氣體通過氮氧化物檢測管27之前,臭氧吸收過濾器28吸收臭氧的緣故,所以不會產生因為臭氧的影響而氮氧化物檢測管27內部脫色等的問題,可以從內部環境氣體正確測定氮氧化物濃度。[Effect of the stator coil deterioration monitoring system]
The effect of the stator coil
接著,說明有關構成定子線圈劣化監視系統20的劣化監視部23所進行的劣化監視處理的效果。
旋轉機器1的運轉時間增大而進展半導電層14的初始階段的侵蝕的話,劣化監視部23係判斷臭氧濃度OC為需要監視位準閾值OT1S以上,定子線圈10的交換的補修檢討就為必要,並在顯示部24中顯示「需要監視位準」。而且,旋轉機器1的運轉時間更進一步增大,進展半導電層14的中期階段的侵蝕的話,劣化監視部23係判斷臭氧濃度OC為警戒位準閾值OT2S以上,定子線圈10的交換的檢討就為必要,並在顯示部24中顯示「警戒位準」。接著,旋轉機器1的運轉時間更進一步增大,半導電層14達到末期階段的侵蝕的話,劣化監視部23係判斷臭氧濃度OC為立即應對位準閾值OT3S以上,定子線圈10的交換就為必要,並在顯示部24中顯示「立即應對位準」。更進一步,半導電層14達到末期階段的侵蝕的話,劣化監視部23係判斷氮氧化物濃度NC為立即應對位準閾值NTS以上也就是,定子線圈10的交換就為必要,並在顯示部24中顯示「立即應對位準」。
因此,第1實施方式的定子線圈劣化監視系統20係如以往的目視檢修般不用使旋轉機器1停止,可以持續監視半導電層14的劣化的緣故,可以持續旋轉機器1的安定運轉。Next, the effect of the deterioration monitoring process performed by the
尚且,第1實施方式的旋轉機器的定子線圈劣化監視系統20係測定臭氧及氮氧化物的濃度並監視定子線圈10的交換時期,但是,僅測定臭氧的濃度而監視定子線圈10,或者是,僅測定氮氧化物的濃度而監視定子線圈10,都不用使旋轉機器1停止而可以持續監視半導電層14的劣化,可以持續旋轉機器1的安定運轉。
Furthermore, the stator coil
而且,第1實施方式的濃度測定部21中,以通過旋轉機器1的內部環境氣體的方式,使用了以變色的程度來測定濃度的臭氧檢測管29,但是,也可以使用臭氧監視器、紅外光譜分析裝置等,是可以發揮同樣的效果。
Furthermore, in the
而且,本發明記載的劣化監視部報知接近定子線圈的壽命之要旨之動作,係在第1實施方式的劣化監視部23所進行的劣化監視處理下,在微計算機等的演算處理裝置的顯示部24中顯示「需要監視位準」、「警戒位準」及「立即應對位準」,但是,本發明的要旨並不限定於此。例如,也可以進行作業員用目視確認臭氧濃度測定值OC及氮氧化物濃度測定值NC,以書面報知半導電層14的侵蝕狀況之方法,是可以發揮同樣的效果。
Furthermore, the operation of the deterioration monitoring unit described in the present invention to report the approach to the life of the stator coil is performed on the display unit of an arithmetic processing device such as a microcomputer under the deterioration monitoring process performed by the
接著,從圖8至圖10為表示濃度測定部21之具體的構成。
Next, FIG. 8 to FIG. 10 show the specific configuration of the
圖8為檢測氮氧化物的裝置,氣體採集管30被插通到在旋轉機器1的機器框架3所形成之連通到旋轉機器1的內部及外部的氣體採集孔3c。氣體採集管30係以可以防止臭
氧接觸所致之腐蝕之不鏽材料等的金屬材料所形成,貫通到矽製的栓31。以該栓31嵌入到氣體採集孔3c的方式,氣體採集管30係延伸到旋轉機器1的內部及外部做配置。
8 shows a device for detecting nitrogen oxides, and a
在氣體採集管30的外側的其中一端,透過連接管32連接到延長管33的其中一端。這些連接管32及延長管33乃是以可以防止臭氧接觸所致之腐蝕之鐵氟龍(商標登錄)等的合成樹脂材料所形成之具有可撓性的管。
One end of the outer side of the
在延長管33的另一端連接臭氧吸收過濾器28的其中一端,在臭氧吸收過濾器28的另一端連接氮氧化物檢測管27的其中一端。接著,在氮氧化物檢測管27的另一端,連接第1氣體吸引裝置25。
One end of the
臭氧吸收過濾器28乃是在縱長方向的兩端設有氣體取入口及氣體排氣口之中空管,於該中空管,收納有如圖9表示之多數個粒狀的鋁AL。在此,臭氧吸收過濾器28的中空管形狀係如圖8表示,縱長方向尺寸L為160mm,如圖9表示,內徑尺寸D為19mm。接著,收納之粒狀的鋁AL係設定成2~5mm左右的大小。經此,從旋轉機器1的內部透過氣體採集管30而被吸引的內部環境氣體係從氣體取入口通過臭氧吸收過濾器28,設定成2~5mm左右的大小的鋁AL提高與內部環境氣體的接觸面積,藉此,吸收或是分解內部環境氣體所包含的臭氧。尚且,被收納在臭氧吸收過濾器28的鋁AL,也可以形成為2~5mm左右的粒塊狀或者是一邊為5mm~10mm左右的鱗片狀。而且,被收納在臭氧吸收過濾器28的材料不限於鋁AL,鐵等之只要是具有吸收或是分解臭氧的性質的材料即可。
而且,第1氣體吸引裝置25係為了正確顯示氮氧化物檢測管27的變色的程度,以流速為50ml/min、累計流量為100ml,來調整吸引旋轉機器1的內部環境氣體。經此,第1氣體吸引裝置25以最佳的流速及累計流量來吸引內部環境氣體,經此,可以高精度進行氮氧化物的濃度檢測。The
而且,圖10為檢測臭氧的裝置,把栓31嵌入到在旋轉機器1的機器框架3所形成的氣體採集孔3c,藉此,氣體採集管30延伸到旋轉機器1的內部及外部做配置,在該氣體採集管30的外側的其中一端,透過連接管32連接延長管33的其中一端。接著,在延長管33的另一端連接臭氧檢測管29的其中一端,在臭氧檢測管29的另一端連接第2氣體吸引裝置26。
第2氣體吸引裝置26係為了正確顯示臭氧檢測管29的變色的程度,以流速為100ml/min、累計流量為1000ml,來調整吸引旋轉機器1的內部環境氣體。經此,第2氣體吸引裝置26以最佳的流速及累計流量來吸引內部環境氣體,經此,可以高精度進行臭氧的濃度檢測。10 is a device for detecting ozone, the
[濃度測定部的效果]
接著,說明有關濃度測定部21的效果。
第1氣體吸引裝置25係以正確顯示氮氧化物檢測管27的變色的程度般的流速及累計流量來調整吸引旋轉機器1的內部環境氣體的緣故,可以高精度進行氮氧化物的濃度檢測。
而且,第2氣體吸引裝置26係以正確顯示臭氧檢測管29的變色的程度般的流速及累計流量來調整吸引旋轉機器1的內部環境氣體的緣故,可以高精度進行臭氧的濃度檢測。
而且,氣體採集管30為不鏽材料等之可以防止臭氧接觸所致之腐蝕的金屬材料,連接管32、延長管33也用鐵氟龍(商標登錄)等之可以防止臭氧接觸所致之腐蝕的合成樹脂材料來形成的緣故,可以長期使用在濃度測定部21。
而且,臭氧吸收過濾器28係於在縱長方向的兩端設有氣體取入口及氣體排氣口之中空管,收納有形成為2~5mm左右的大小的粒狀、粒塊狀或者是一邊為5mm~10mm左右的鱗片狀之鋁AL或鐵等的臭氧吸收材的緣故,通過中空管的內部環境氣體係以提高與臭氧吸收材的接觸面積的方式,可以期待高度的臭氧的吸收、分解效果。[Effect of the concentration measuring section]
Next, the effect of the
1:旋轉機器
2:機器本體
3:機器框架
3c:氣體採集孔
4:轉子
5:定子
6:旋轉軸
7:轉子線圈
8:定子鐵心
9:槽
10:定子線圈
11:導線
12:線材線圈
13:絕緣層
14:半導電層
15:楔
20:定子線圈劣化監視系統
21:濃度測定部(氣體檢測裝置)
22:測定資料記錄部
23:劣化監視部
24:顯示部
25:第1氣體吸引裝置(氮氧化物用吸引裝置)
26:第2氣體吸引裝置(臭氧用吸引裝置)
27:氮氧化物檢測管(氮氧化物濃度檢測部)
28:臭氧吸收過濾器
29:臭氧檢測管(臭氧濃度檢測部)
AL:鋁1: Rotary machine
2: Machine body
3:
[圖1]為表示在本發明使用的旋轉機器之概略構成圖。 [圖2]為圖1的II-II線箭頭方向視圖,表示收容在旋轉機器中的定子鐵心的槽的定子線圈之圖。 [圖3]為表示有關本發明的第1實施方式的定子線圈劣化監視系統的構成之圖。 [圖4]為表示定子線圈劣化監視系統的濃度測定部的構成之圖。 [圖5]為表示定子線圈劣化監視系統的劣化監視部進行的劣化監視處理之流程圖。 [圖6]為表示定子線圈的半導電層因為表面放電的產生而侵蝕進展的程度(侵蝕面積的變化)、以及因為半導電層的侵蝕程度而變化的臭氧濃度之關係之圖表。 [圖7]為表示旋轉機器的運轉時間的經過,以及在旋轉機器的內部產生的臭氧、氮氧化物的濃度的變化之圖。 [圖8]為表示在本發明使用的氣體檢測裝置中,檢測氮氧化物的濃度的裝置之圖。 [圖9]為圖8的VIII-VIII線箭頭方向視圖。 [圖10]為表示在本發明使用的氣體檢測裝置中,檢測臭氧的濃度的裝置之圖。1 is a schematic configuration diagram showing a rotary machine used in the present invention. [ Fig. 2] Fig. 2 is a view taken along the line II-II of Fig. 1 in the direction of arrows, showing a stator coil accommodated in a slot of a stator core in a rotating machine. 3 is a diagram showing the configuration of the stator coil deterioration monitoring system according to the first embodiment of the present invention. [ Fig. 4] Fig. 4 is a diagram showing a configuration of a concentration measuring unit of the stator coil deterioration monitoring system. [ Fig. 5] Fig. 5 is a flowchart showing a deterioration monitoring process performed by a deterioration monitoring unit of the stator coil deterioration monitoring system. 6 is a graph showing the relationship between the degree of progress of erosion of the semiconductive layer of the stator coil due to surface discharge (change in erosion area) and the change in ozone concentration due to the degree of erosion of the semiconductive layer. [ Fig. 7] Fig. 7 is a graph showing changes in the concentrations of ozone and nitrogen oxides generated inside the rotating equipment with the elapse of the operation time of the rotating equipment. [ Fig. 8] Fig. 8 is a diagram showing a device for detecting the concentration of nitrogen oxides in the gas detection device used in the present invention. [ Fig. 9] Fig. 9 is a view in the direction of arrows along the line VIII-VIII of Fig. 8 . [ Fig. 10] Fig. 10 is a diagram showing a device for detecting the concentration of ozone in the gas detection device used in the present invention.
1:旋轉機器1: Rotary machine
3:機器框架3: Machine Frame
3c:氣體採集孔3c: Gas collection hole
21:濃度測定部(氣體檢測裝置)21: Concentration measuring section (gas detection device)
25:第1氣體吸引裝置(氮氧化物用吸引裝置)25: The first gas suction device (suction device for nitrogen oxides)
27:氮氧化物檢測管(氮氧化物濃度檢測部)27: Nitrogen oxide detection tube (nitrogen oxide concentration detection part)
28:臭氧吸收過濾器28: Ozone absorption filter
30:氣體採集管30: Gas collection tube
31:栓31: Bolt
32:連接管32: connecting pipe
33:延長管33: Extension Tube
Claims (22)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW109118016A TWI760757B (en) | 2020-05-29 | 2020-05-29 | Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW109118016A TWI760757B (en) | 2020-05-29 | 2020-05-29 | Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system |
Publications (2)
Publication Number | Publication Date |
---|---|
TW202144798A TW202144798A (en) | 2021-12-01 |
TWI760757B true TWI760757B (en) | 2022-04-11 |
Family
ID=80783633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW109118016A TWI760757B (en) | 2020-05-29 | 2020-05-29 | Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWI760757B (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102160264A (en) * | 2008-09-18 | 2011-08-17 | 乔治洛德方法研究和开发液化空气有限公司 | Method and device for tracking degradation of insulators in rotary machine |
CN102939702A (en) * | 2010-06-10 | 2013-02-20 | 三菱电机株式会社 | Method and device for reduction in concentrations of ozone and nitric acid generated in cooling air that flows through circulation airflow path in rotary electric machine |
US20140326592A1 (en) * | 2011-07-15 | 2014-11-06 | Deka Products Limited Partnership | Water Vapor Distillation Apparatus, Method and System |
JP2018200179A (en) * | 2017-05-25 | 2018-12-20 | 富士電機株式会社 | Partial discharge monitoring apparatus and partial discharge monitoring method for rotary electric machine |
TW201907644A (en) * | 2017-07-04 | 2019-02-16 | 瑞士商力威磁浮技術有限公司 | A rotor that can be magnetically levitated and a rotary machine with such a rotor |
-
2020
- 2020-05-29 TW TW109118016A patent/TWI760757B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102160264A (en) * | 2008-09-18 | 2011-08-17 | 乔治洛德方法研究和开发液化空气有限公司 | Method and device for tracking degradation of insulators in rotary machine |
CN102939702A (en) * | 2010-06-10 | 2013-02-20 | 三菱电机株式会社 | Method and device for reduction in concentrations of ozone and nitric acid generated in cooling air that flows through circulation airflow path in rotary electric machine |
US20140326592A1 (en) * | 2011-07-15 | 2014-11-06 | Deka Products Limited Partnership | Water Vapor Distillation Apparatus, Method and System |
JP2018200179A (en) * | 2017-05-25 | 2018-12-20 | 富士電機株式会社 | Partial discharge monitoring apparatus and partial discharge monitoring method for rotary electric machine |
TW201907644A (en) * | 2017-07-04 | 2019-02-16 | 瑞士商力威磁浮技術有限公司 | A rotor that can be magnetically levitated and a rotary machine with such a rotor |
Also Published As
Publication number | Publication date |
---|---|
TW202144798A (en) | 2021-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6583577B1 (en) | Gas detector for rotating equipment, gas detection method, and stator coil deterioration monitoring system | |
JP5653922B2 (en) | Method and device for detecting degradation of insulators in rotating machinery | |
JP2018200179A (en) | Partial discharge monitoring apparatus and partial discharge monitoring method for rotary electric machine | |
US20220128539A1 (en) | A sensor for transformer condition assessment | |
JP5681283B2 (en) | Member for guiding or containing fluid, and method for inspecting the member | |
JP2004347401A (en) | Diagnostic method and diagnostic device of rolling bearing | |
TWI760757B (en) | Gas detection device for rotating machine, gas detection method, and stator coil deterioration monitoring system | |
JP2009008427A (en) | Method for assessing remaining life of power receiving/distributing device | |
Dehlinger et al. | Surface partial discharge in hydrogenerator stator windings: Causes, symptoms, and remedies | |
JP3272933B2 (en) | Remaining life evaluation method for rotating electrical machine windings | |
KR100730968B1 (en) | A method for determining the presence of water in materials | |
Stone et al. | Detection of stator winding stress relief coating deterioration in conventional and inverter fed motors and generators | |
US7876093B2 (en) | Eddy current inspection device, proximity probe and method for assembling an eddy current inspection device | |
CN113970542A (en) | Gas detection device and method for rotating equipment, and stator coil deterioration monitoring system | |
KR102493170B1 (en) | Gas detection device of rotary machine, gas detection method and system for monitoring degradation of stator coil | |
JP6460003B2 (en) | Diagnosis method of electrical equipment | |
CN211478525U (en) | System for diagnosing insulation defect at end part of stator wire rod of generator | |
JPS6217464B2 (en) | ||
JP2021050922A (en) | Insulation deterioration diagnosis device | |
JP7127629B2 (en) | Insulator Deterioration Diagnosis Device and Insulator Deterioration Diagnosis Method for Electric Rotating Machine | |
JP7192031B2 (en) | Insulation Deterioration Diagnosis Method for Rotating Machines Using Ozone Concentration Measurement | |
JPS6031179B2 (en) | How to detect early failure of hydrogen cooled generator | |
Haq et al. | What You Should Know Before Acquiring Partial Discharge on High-Voltage Motors and Generators: Case Studies and Remedial Actions | |
CN113009286A (en) | Method for diagnosing insulation defect at end part of stator wire rod of generator | |
Im et al. | Accelerated life test of bearing under electrical stress |