JPS6323734B2 - - Google Patents
Info
- Publication number
- JPS6323734B2 JPS6323734B2 JP15956780A JP15956780A JPS6323734B2 JP S6323734 B2 JPS6323734 B2 JP S6323734B2 JP 15956780 A JP15956780 A JP 15956780A JP 15956780 A JP15956780 A JP 15956780A JP S6323734 B2 JPS6323734 B2 JP S6323734B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- temperature sensor
- output signal
- overheating
- cooling gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000013021 overheating Methods 0.000 claims description 24
- 239000000112 cooling gas Substances 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000003745 diagnosis Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000013618 particulate matter Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Protection Of Generators And Motors (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Description
【発明の詳細な説明】
本発明は回転電機の局部過熱診断装置に係り、
特にガス冷却式タービン発電機のコイル、コア等
に発生する局部的な過熱をその表面に塗布されて
いるワニス類から発生する微粒子の濃度により診
断する局部過熱診断装置に関する。[Detailed Description of the Invention] The present invention relates to a local overheating diagnosis device for a rotating electrical machine,
In particular, the present invention relates to a local overheat diagnostic device for diagnosing local overheating occurring in the coils, cores, etc. of gas-cooled turbine generators based on the concentration of particulates generated from varnishes applied to the surfaces thereof.
タービン発電機の単機容量の増大に伴い、発電
機内部での局部絶縁不良による短絡が思わぬ大事
故を起こす危険性が高い。特に、発電機のコイ
ル、コア部分での焼損事故発生の可能性は大であ
る。そこで、大事故に至る前に、コイル、コア表
面に塗布されている絶縁材（ワニス類）から発生
する微粒子を検出し、コイル、コアの温度上昇の
程度を把握して焼損事故を未然に防ぐためのコイ
ル、コアの過熱診断装置が既に提案されている。 As the single unit capacity of turbine generators increases, there is a high risk that short circuits due to local insulation defects inside the generator will cause unexpected major accidents. In particular, there is a high possibility that a burnout accident will occur in the coil and core parts of the generator. Therefore, before a major accident occurs, we can detect fine particles generated from the insulating material (varnish) applied to the surface of the coil and core, understand the degree of temperature rise in the coil and core, and prevent burnout accidents. A coil and core overheating diagnostic device has already been proposed.
この過熱診断装置の原理は、コイル、コア過熱
により前記部品に塗布されている絶縁材が熱分解
し、微粒子（0.001〜１ミクロン程度といわれて
いる。）を発生してこれが前記コイル、コアの冷
却ガス（一般の大型発電機では水素が使用されて
いる）中に拡散、浮遊することから、この冷却ガ
スの一部を機外に抽出し、冷却ガス中の粒粒子濃
度の変化を測定して過熱程度を診断するものであ
る。この微粒子の検出器としては、微粒子に負コ
ロナ放電によつて発生する負イオンを射突させて
微粒子を荷電粒子にし、この荷電粒子の保有電荷
量をイオン電流として検出する方式の検出器が特
願昭48−113954号に記載されている。 The principle of this overheating diagnostic device is that the insulating material coated on the parts is thermally decomposed due to overheating of the coil and core, generating fine particles (approximately 0.001 to 1 micron), which are then released into the coil and core. Since hydrogen is diffused and suspended in the cooling gas (hydrogen is used in general large power generators), a portion of this cooling gas is extracted outside the machine and changes in particle concentration in the cooling gas are measured. This is used to diagnose the degree of overheating. A particular type of detector for these fine particles is one that bombards the fine particles with negative ions generated by negative corona discharge, turns the fine particles into charged particles, and detects the amount of charge held by these charged particles as an ion current. It is described in the patent application No. 113954/1973.
この過熱診断装置は上記したようにタービン発
電機のコイル、コアの焼損事故を未然に防ぐこと
ができることから、タービン発電機の予防保全装
置として有効な方法である。 As described above, this overheating diagnostic device can prevent burnout accidents of the coils and cores of turbine generators, and is therefore an effective method as a preventive maintenance device for turbine generators.
しかし、従来から提案されているこの過熱診断
装置は、微粒子濃度検出器はそれ自体、誤動作、
誤検知により信号が変化する可能性があるため、
信頼性に欠ける嫌いがあつた。 However, in this overheating diagnostic device that has been proposed in the past, the particulate concentration detector itself may malfunction or
Because the signal may change due to false positives,
I disliked the lack of reliability.
本発明の目的は、このような従来技術の欠点を
解消し、信頼性の高い回転電機の局部過熱診断装
置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to eliminate such drawbacks of the prior art and to provide a highly reliable local overheat diagnosis device for a rotating electric machine.
この目的を達成するため、本発明は、微粒子濃
度検出器の他に、回転電機の固定子鉄心の温度を
監視する例えば熱電対からなる固定子温度センサ
と、循環している冷却ガスの温度を監視する例え
ばサーチコイルからなるガス温度センサとを併設
して、これら微粒子濃度検出器と固定子温度セン
サとガス温度センサのそれぞれの出力信号を診断
装置に取入れるようになし、微粒子濃度検出器の
出力信号、固定子温度センサの出力信号及びガス
温度センサの出力信号の３者が異常である出力信
号となつたときに、前記診断装置より局部過熱が
生じている信号を発するようにしたのである。 To achieve this objective, the present invention includes, in addition to a particulate concentration detector, a stator temperature sensor consisting of, for example, a thermocouple, which monitors the temperature of the stator core of a rotating electric machine, and a stator temperature sensor, which monitors the temperature of the circulating cooling gas. For example, a gas temperature sensor consisting of a search coil is installed to monitor the particulate concentration detector, and the output signals of these particulate concentration detectors, stator temperature sensors, and gas temperature sensors are input into the diagnostic device. When the output signal, the output signal of the stator temperature sensor, and the output signal of the gas temperature sensor become abnormal output signals, the diagnostic device issues a signal indicating that local overheating has occurred. .
次に本発明の実施例を図とともに説明する。図
は、回転子ギヤツプピツクアツプ型冷却方式のタ
ービン発電機を示す図である。 Next, embodiments of the present invention will be described with reference to the drawings. The figure shows a rotor gear pickup type cooling type turbine generator.
タービン発電機のケーシング１内には高純度
（約98Vol％）の水素ガスが冷却ガスとして高圧
（２〜５Kg／cm2Ｇ）で封入され、軸流フアン４に
より機内各部を循環して冷却する構造になつてい
る。冷却ガスの循環流路は、タービン側（TS）
とコレクタリング側（CS）とに分けられ、TS抽
気管７とCS抽気管８の双方から冷却ガスの一部
が抽出されて、微粒子濃度検出器１７へ同時に送
られる。この検出器１７を通過した冷却ガスは、
それぞれ戻り管９，１０を通してケーシング１内
に戻される。 High-purity (approximately 98 Vol%) hydrogen gas is sealed as a cooling gas at high pressure (2 to 5 Kg/cm 2 G) in the casing 1 of the turbine generator, and is circulated through each part of the machine by an axial fan 4 to cool it. It's structured. The cooling gas circulation path is on the turbine side (TS)
A part of the cooling gas is extracted from both the TS bleed pipe 7 and the CS bleed pipe 8 and sent to the particulate concentration detector 17 at the same time. The cooling gas that has passed through this detector 17 is
They are returned into the casing 1 through return pipes 9 and 10, respectively.
微粒子濃度検出器１７で検出された微粒子濃度
が所定値以上になつたと判断されると、TS抽気
管７とCS抽気管８とを順次切換えて再び濃度検
出を行ない、それにより過熱がTS、CSのいずれ
で生じているかの概略位置を求める。冷却ガスの
温度状況を監視するため、TSのガスクーラ５お
よびCSのガスクーラ６のそれぞれの吸気側にサ
ーチコイル１８，１９が配置されている。また固
定子２における鉄心の温度を監視するため、鉄心
のTSスロツト部およびCSスロツト部にはそれぞ
れ熱電対２０，２１が設置されている。 When it is determined that the particulate concentration detected by the particulate concentration detector 17 has exceeded a predetermined value, the TS bleed pipe 7 and the CS bleed pipe 8 are sequentially switched and concentration detection is performed again. Find the approximate location where it is occurring. In order to monitor the temperature status of the cooling gas, search coils 18 and 19 are arranged on the intake side of each of the TS gas cooler 5 and the CS gas cooler 6. Further, in order to monitor the temperature of the iron core in the stator 2, thermocouples 20 and 21 are installed in the TS slot portion and the CS slot portion of the iron core, respectively.
なお図中の３は回転子、１１，１２，１３，１
４，１５，１６は所定位置に設置された電磁弁、
２２は診断装置、２３は表示装置、２４は警報装
置である。そして前記微粒子濃度検出器１７、サ
ーチコイル１８，１９および熱電対２０，２１の
出力は全て前記診断装置２２に入力されて、デー
タ処理される。 Note that 3 in the figure is a rotor, 11, 12, 13, 1
4, 15, 16 are solenoid valves installed at predetermined positions;
22 is a diagnostic device, 23 is a display device, and 24 is an alarm device. The outputs of the particulate concentration detector 17, search coils 18, 19, and thermocouples 20, 21 are all input to the diagnostic device 22 for data processing.
微粒子濃度検出器１７で得られるデータは、タ
ービン発電機が正常な場合には機内の冷却ガス中
の微粒子量が少なく、量的な経時変化はほとんど
ないから、微粒子濃度検出器１７の出力は小さく
安定している。過熱が生じた場合、過熱発生点近
傍の機械部分に塗布されている有機絶縁材が熱分
解を起こし、微粒子を発生して冷却ガス中に放出
することで微粒子濃度が急増して、微粒子濃度検
出器１７の出力変化が顕著に現われ、出力値も大
きくなる。 The data obtained by the particulate concentration detector 17 shows that when the turbine generator is normal, the amount of particulates in the cooling gas inside the machine is small and there is almost no quantitative change over time, so the output of the particulate concentration detector 17 is small. stable. When overheating occurs, the organic insulating material coated on mechanical parts near the point where the overheating occurs thermally decomposes, generating particulates and releasing them into the cooling gas, causing a rapid increase in the particulate concentration, making it difficult to detect the particulate concentration. The change in the output of the device 17 becomes noticeable, and the output value also increases.
しかし、微粒子濃度検出器１７はそれ自体、誤
動作、誤検知により信号が変化する可能性がある
ため、他のセンサとの出力パターン認識を行な
う。すなわち、サーチコイル１８，１９で得られ
る冷却ガス温度の変化、ならびに熱電対２０，２
１で得られる固定子鉄心の温度変化が顕著に現わ
れた場合には、微粒子濃度検出器１７は正常であ
り、このように条件が重なれば、過熱は鉄心部分
に発生したことが判定でき、過熱温度も知ること
もできる。また、微粒子濃度検出器１７の出力変
化量は微粒子濃度に比例するから、その出力状態
より過熱程度も識別できる。 However, since the particulate concentration detector 17 itself may have a signal change due to malfunction or erroneous detection, it performs output pattern recognition with other sensors. That is, the change in the cooling gas temperature obtained by the search coils 18, 19 and the thermocouples 20, 2
If the temperature change of the stator core obtained in step 1 appears significantly, the particulate concentration detector 17 is normal, and if these conditions overlap, it can be determined that overheating has occurred in the core. You can also know the superheat temperature. Further, since the amount of change in the output of the particulate concentration detector 17 is proportional to the particulate concentration, the degree of overheating can also be determined from the output state.
３種類の過熱センサの出力を基に異常判定は下
記の如く実施される。第１のセンサである微粒子
濃度検出器１７の異常と判断される微粒子濃度は
対象とする発電機の機内容積によつて決定されこ
れをS1とする。第２のセンサの熱電対２０，２１
の異常は正常時の温度と異常時の温度上昇による
温度差ΔTを監視し、異常と判断する温度差ΔT
をS2とする。次に、サーチコイル１８，１９の正
常時と異常時の温度上昇分をΔtとし、異常と判
断するΔtをS3とする。各センサにより、冷却ガ
ス中の微粒子濃度及び温度が連続的に計測され
る。機内に過熱発生により熱電対２０，２１に出
力変化が現われS2レベルを超え、微粒子濃度検出
器１７の出力がS1レベルを超えたとき、固定子端
部に過熱発生と判定される。このときサーチコイ
ル１８，１９の出力がS3レベル以下では過熱は初
期段階と判断され、損傷が少ないと判断される。
S3レベルを超えると、過熱が進展していることを
意味し発電機の停止命令が下される。また、微粒
子濃度検出器１７のみ出力変化が現われ、出力が
S1レベルに到達すると前記した如く、サンプルガ
ス抽気系統が切り換えられ、タービン側かコレク
タリング側の過熱位置の概略判断が行なわれると
同時に、サーチコイル１８，１９の温度変化と照
合し、S3レベル以下であると過熱初期と判断され
る。 Abnormality determination is performed as follows based on the outputs of three types of overheating sensors. The particle concentration at which the particle concentration detector 17, which is the first sensor, is determined to be abnormal is determined by the internal volume of the target generator, and is defined as S1 . Thermocouple 20, 21 of the second sensor
The abnormality is determined by monitoring the temperature difference ΔT between normal temperature and abnormal temperature rise, and determining the temperature difference ΔT that is determined to be abnormal.
Let be S 2 . Next, let Δt be the temperature rise of the search coils 18 and 19 when they are normal and when they are abnormal, and let S 3 be Δt that is determined to be abnormal. Each sensor continuously measures the particle concentration and temperature in the cooling gas. When an output change appears in the thermocouples 20 and 21 due to overheating in the machine and exceeds the S2 level, and the output of the particle concentration detector 17 exceeds the S1 level, it is determined that overheating has occurred at the end of the stator. At this time, if the outputs of the search coils 18 and 19 are below the S3 level, overheating is determined to be in the initial stage, and damage is determined to be small.
If the S 3 level is exceeded, it means that overheating is progressing and the generator is ordered to shut down. In addition, only the particulate concentration detector 17 showed a change in output, and the output
When the S 1 level is reached, as described above, the sample gas extraction system is switched, and a rough judgment is made as to whether the overheating position is on the turbine side or the collector ring side, and at the same time, it is compared with the temperature change of the search coils 18 and 19, and the S 3 If it is below this level, it is determined that overheating is in the early stages.
本発明は前述のような構成になつており、過熱
状況をも識別することができ、信頼性の高いこの
種回転電機の局部過熱診断装置を得ることができ
る。 The present invention has the above-described configuration, and it is possible to obtain a highly reliable local overheat diagnosis device for this type of rotating electrical machine, which can also identify overheating conditions.
図は本発明の実施例に係る過熱診断装置を備え
たタービン発電機の概略構成図である。
１７……微粒子濃度検出器、１８，１９……サ
ーチコイル、２０，２１……熱電対、２２……診
断装置。
The figure is a schematic configuration diagram of a turbine generator equipped with an overheating diagnostic device according to an embodiment of the present invention. 17... Particulate concentration detector, 18, 19... Search coil, 20, 21... Thermocouple, 22... Diagnostic device.
Claims (1)
被覆された部分を有し、かつ機内にガスクーラを
有して、冷却ガスが循環しているガス冷却式回転
電機と、この回転電機の冷却ガス中の微粒子の濃
度を検出する微粒子濃度検出器と、この微粒子濃
度検出器の出力信号により過熱状態を診断する診
断装置とを備え、微粒子濃度より局部過熱を診断
するようにしたものにおいて、前記回転電機の固
定子鉄心部に、固定子鉄心の温度を検出する固定
子温度センサを設けるとともに、前記冷却ガスの
循環通路に、冷却ガスの温度を検出するガス温度
センサを設け、この固定子温度センサと前記ガス
温度センサの出力信号を、前記診断装置に取り入
れるようになし前記微粒子濃度検出器の出力信
号、固定子温度センサの出力信号及びガス温度セ
ンサの出力信号の３者が異常である出力信号とな
つたときに、前記診断装置より局部過熱が生じて
いる信号を発するようにしたことを特徴とする回
転電機の局部過熱診断装置。1. A gas-cooled rotating electric machine that has a part covered with an organic insulating material that thermally decomposes when exposed to high temperatures, and that has a gas cooler inside the machine and circulates cooling gas, and the cooling gas of this rotating electric machine. A particulate concentration detector for detecting the concentration of particulates inside a particulate matter, and a diagnostic device for diagnosing an overheating state based on an output signal of this particulate concentration detector, and for diagnosing local overheating based on the particulate concentration, the rotation A stator temperature sensor for detecting the temperature of the stator core is provided in the stator core of the electric machine, and a gas temperature sensor for detecting the temperature of the cooling gas is provided in the cooling gas circulation passage, and the stator temperature sensor and the output signal of the gas temperature sensor are input into the diagnostic device, and the output signal is that three of the output signal of the particulate concentration detector, the output signal of the stator temperature sensor, and the output signal of the gas temperature sensor are abnormal. 1. A local overheat diagnosis device for a rotating electrical machine, characterized in that, when the condition occurs, the diagnostic device emits a signal indicating that local overheat has occurred.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15956780A JPS5784333A (en) | 1980-11-14 | 1980-11-14 | Local overheating diagnosing apparatus for electrical rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15956780A JPS5784333A (en) | 1980-11-14 | 1980-11-14 | Local overheating diagnosing apparatus for electrical rotary machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5784333A JPS5784333A (en) | 1982-05-26 |
| JPS6323734B2 true JPS6323734B2 (en) | 1988-05-18 |
Family
ID=15696540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15956780A Granted JPS5784333A (en) | 1980-11-14 | 1980-11-14 | Local overheating diagnosing apparatus for electrical rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5784333A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021081000A1 (en) * | 2019-10-25 | 2021-04-29 | Lam Research Corporation | Heat and volatile-organic-compounds detecting systems |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2549078A1 (en) | 2011-07-21 | 2013-01-23 | Siemens Aktiengesellschaft | Suction duct for intake air of a gas turbine and method for operating a stationary gas turbine |
-
1980
- 1980-11-14 JP JP15956780A patent/JPS5784333A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021081000A1 (en) * | 2019-10-25 | 2021-04-29 | Lam Research Corporation | Heat and volatile-organic-compounds detecting systems |
| CN114616446A (en) * | 2019-10-25 | 2022-06-10 | 朗姆研究公司 | Thermal and volatile organic compound detection system |
| US12181342B2 (en) | 2019-10-25 | 2024-12-31 | Lam Research Corporation | Heat and volatile-organic-compounds detecting systems |
| CN114616446B (en) * | 2019-10-25 | 2025-10-17 | 朗姆研究公司 | Thermal and volatile organic compound detection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5784333A (en) | 1982-05-26 |
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