JPS6188741A - Monitoring system of cooling medium temperature for rotary electric machine - Google Patents
Monitoring system of cooling medium temperature for rotary electric machineInfo
- Publication number
- JPS6188741A JPS6188741A JP59207009A JP20700984A JPS6188741A JP S6188741 A JPS6188741 A JP S6188741A JP 59207009 A JP59207009 A JP 59207009A JP 20700984 A JP20700984 A JP 20700984A JP S6188741 A JPS6188741 A JP S6188741A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- cooling medium
- alarm
- stator coil
- generator
- 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.)
- Pending
Links
Landscapes
- Motor Or Generator Cooling System (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は固定子コイル内部に設けた冷却媒体通路の出
口における冷却媒体温度を監視する回転電機の冷却媒体
温度監視方式に関する０〔従来の技術〕
従来この種の装置として第５図、第６図および第７図に
示すようなタービン発電機の冷却媒体温度監視装置があ
った。第５図はこのタービン発電機内部の通風状況を示
す説明図、第６図は固定子コイルの断面図、第７図は固
定子コイルの冷却媒体通路の出口における冷却媒体温度
の監視回路図の説明図である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a cooling medium temperature monitoring method for a rotating electrical machine that monitors the cooling medium temperature at the outlet of a cooling medium passage provided inside a stator coil. ] As a conventional device of this type, there has been a cooling medium temperature monitoring device for a turbine generator as shown in FIGS. 5, 6, and 7. Fig. 5 is an explanatory diagram showing the ventilation situation inside this turbine generator, Fig. 6 is a sectional view of the stator coil, and Fig. 7 is a circuit diagram for monitoring the coolant temperature at the outlet of the coolant passage of the stator coil. It is an explanatory diagram.
第５図において、１は発電機のフレームで、機内に水素
ガスを封入しておくため、気密構造となっている０２は
固定子鉄心、３は固定子コイル、４は回転子、５は回転
子４の回転軸４８両端を支える軸受、６は回転子４の一
端部外周に突設したプロワ、８は水素ガスクーラである
。また、ｃｔは低温の水素ガスの流れの方向を示す矢印
、Ｇ２は固定子コイル３の内部における水素ガスの流れ
の方向を示す矢印、Ｇ３は固定子コイル３内部に設けた
冷却媒体通路の出口における水素ガスの流れの方向を示
す矢印、Ｇ４は回転子コイル内部における水素ガスの流
れの方向を示す矢印である。In Figure 5, 1 is the frame of the generator, which has an airtight structure in order to seal hydrogen gas inside the machine. 02 is the stator core, 3 is the stator coil, 4 is the rotor, and 5 is the rotating Bearings that support both ends of the rotating shaft 48 of the rotor 4, 6 a blower protruding from the outer periphery of one end of the rotor 4, and 8 a hydrogen gas cooler. Further, ct is an arrow indicating the flow direction of low-temperature hydrogen gas, G2 is an arrow indicating the flow direction of hydrogen gas inside the stator coil 3, and G3 is an exit of the cooling medium passage provided inside the stator coil 3. An arrow G4 indicates the direction of the flow of hydrogen gas inside the rotor coil.
次に、この水素ガスによる冷却作用について述べると、
水素ガスはフレーム１内に封止されておシ、回転子４の
回転によってプロワ６によシガスクーラフに送られて冷
却される。冷却された低温の水素ガス８は矢印Ｇ１の向
きに流れ、固定子コイル３のガス入口から固定子コイル
３の内部を軸方向（矢印Ｇ２方向）に通過して、固定子
コイル３の抵抗損失などによる発生熱を奪い、温度の高
い水素ガスとなって固定子コイル３の冷却媒体通路の出
口から矢印Ｇ３方向に排出される。Next, let's talk about the cooling effect of hydrogen gas.
Hydrogen gas is sealed within the frame 1, and is sent to the gas cooler by the blower 6 and cooled by the rotation of the rotor 4. The cooled low-temperature hydrogen gas 8 flows in the direction of arrow G1, passes from the gas inlet of stator coil 3 through the interior of stator coil 3 in the axial direction (direction of arrow G2), and reduces the resistance loss of stator coil 3. The hydrogen gas absorbs the heat generated by the hydrogen gas, becomes high-temperature hydrogen gas, and is discharged from the exit of the cooling medium passage of the stator coil 3 in the direction of arrow G3.
一方、回転子４の回転子コイルに入った低温の水素ガス
はこの回転子コイルの両端から中央部に向って軸方向（
矢印Ｇ４）方向に流れ、その回転子コイルに生じた発生
熱を奪い、温度の高い水素ガスとなってその回転子コイ
ルの中央部から排出される。On the other hand, the low-temperature hydrogen gas that has entered the rotor coil of rotor 4 moves in the axial direction (
It flows in the direction of arrow G4), absorbs the heat generated in the rotor coil, becomes high temperature hydrogen gas, and is discharged from the center of the rotor coil.
これらの高温の水素ガスはブロワ６によってガスクーラ
７に送られ、冷却水と熱交換を行って低温ガスとなり、
再び上記の各矢印Ｇｒ、Ｇｚ、Ｇｓ、Ｇ＜の方向に循還
する。These high-temperature hydrogen gases are sent to the gas cooler 7 by the blower 6, where they exchange heat with cooling water and become low-temperature gas.
It circulates again in the directions of the above-mentioned arrows Gr, Gz, Gs, and G<.
また、固定子コイル３付近の構造は第６図に示すように
なっている。同図において、１２は固定子鉄心、１３ｆ
ｉ固定子スロツトであり、このスロット１３に固定子コ
イル３が挿入されている。１４は固定子コイル３の対地
絶縁部材、１５は固定子コイル導体、１６はこの導体１
５内に埋設された通風管である。この通風管１６は固定
子コイルの全長にわたって設けられ、この通風管１６内
を水素ガスが通過することによって固定子＝イル３を冷
却する。固定子コイル３はスペーサ１８．１９を介在し
て、スロットウェッジ２０により固定子スロット１３内
に脱出しないように保持されている。Further, the structure around the stator coil 3 is as shown in FIG. In the same figure, 12 is a stator core, 13f
i stator slot, and the stator coil 3 is inserted into this slot 13. 14 is a ground insulating member of the stator coil 3, 15 is a stator coil conductor, and 16 is this conductor 1.
This is a ventilation pipe buried inside 5. The ventilation pipe 16 is provided over the entire length of the stator coil, and hydrogen gas passes through the ventilation pipe 16 to cool the stator coil 3. The stator coil 3 is held in the stator slot 13 by a slot wedge 20 with spacers 18, 19 interposed therebetween so as not to escape.
さらに、冷却媒体温度の監視回路はＷＪ７図に示す。水
素ガスは固定子コイル３内部を通過する際に固定子コイ
ル３の熱を吸収し、冷却媒体通路の出口つまシ通風管１
６の出口から排出される。２１は複数の固定子コイル３
の冷却媒体通路のうち出口に設けた測温索子で、その出
口から排出される水素ガスの温度を測定する。測温素子
２１からの温度信号は記録計２２および警報装置２３に
入力される。Furthermore, the cooling medium temperature monitoring circuit is shown in Figure WJ7. When the hydrogen gas passes through the stator coil 3, it absorbs the heat of the stator coil 3, and the hydrogen gas absorbs the heat of the stator coil 3 and passes through the outlet of the cooling medium passage.
It is discharged from outlet 6. 21 is a plurality of stator coils 3
The temperature of the hydrogen gas discharged from the outlet is measured by a temperature measuring cable installed at the outlet of the cooling medium passage. A temperature signal from the temperature measuring element 21 is input to a recorder 22 and an alarm device 23.
警報装置２３はすべての測温素子２１からの温度信号を
常に一括監視し、このうちいずれかの測温素子で検出し
た温度が予め設定した警報値を超えた場合に警報を発す
る。そしてとの警報値は発電機の負荷の大きさすなわち
電機子電流の大きさに関係なく測温データのみに依存し
て一定の値に定められている。第８図は電機子電流と冷
却媒体通路の出口における冷却媒体温度および警報値と
の関係を示すグラフである。なお、ここでは定格電機子
電流における上記冷却媒体温度の上昇を１（ｐ、ｕ−）
として表わしである。The alarm device 23 always collectively monitors the temperature signals from all the temperature measuring elements 21, and issues an alarm when the temperature detected by any of the temperature measuring elements exceeds a preset alarm value. The alarm value is determined to be a constant value depending only on the temperature measurement data, regardless of the magnitude of the load on the generator, that is, the magnitude of the armature current. FIG. 8 is a graph showing the relationship between the armature current, the coolant temperature at the outlet of the coolant passage, and the alarm value. In addition, here, the increase in the above cooling medium temperature at the rated armature current is expressed as 1 (p, u-)
It is expressed as .
従来の冷却媒体温度監視は以上のように構成されている
ので、複数の固定子コイル３の各測温素子で検出した温
度信号のうちいずれかが上記警報値を越えることによシ
贅報が発生されるまで固定子コイルの異常を発見するの
が困難であり、かつ異常発生後の迅速な処置ができない
とｂう問題点があった。Since the conventional cooling medium temperature monitoring is configured as described above, a malfunction occurs when any one of the temperature signals detected by each temperature measuring element of the plurality of stator coils 3 exceeds the above alarm value. There have been problems in that it is difficult to discover an abnormality in the stator coil until it occurs, and it is impossible to take immediate action after the abnormality occurs.
また、固定子コイルの冷却媒体通路の出口における冷却
媒体温度は電機子電流の大きさに応じて変化するが、上
記θ報値が電機子電流に関係なく一定であるため電機子
電流の小さい領域では警報値とのひらきが大きくなり１
、電機子が相当以上に温度上昇しないと固定子コイルの
異常を正しく判断できないし、逆に′ＦＬ機子電子電流
きい領域では冷却媒体温度の上昇により誤って清報を発
しやすくなるという間、頂点があった。In addition, the coolant temperature at the exit of the coolant passage of the stator coil changes depending on the magnitude of the armature current, but since the above θ signal value is constant regardless of the armature current, it is possible to Then, the difference between the alarm value and the alarm value becomes 1.
, unless the temperature of the armature rises above a considerable level, abnormalities in the stator coil cannot be correctly determined, and conversely, in the 'FL armature electronic current threshold region, it is easy to erroneously issue a warning due to the rise in coolant temperature. There was a peak.
更に、警報発生前に固定子コイル３の異常を発見するた
め、従来では電機子電流の変化と上記温度記録計に表示
される全てΩ温度値の時間変化を見比べて運転員が判断
していたので、運転員の常時監視による疲労が著るしく
、固定子コイル３が異常であるかどうかの判断も多分に
経験にたよるところがあシ、誤判断する場合が生じてい
た。Furthermore, in order to discover abnormalities in the stator coil 3 before an alarm occurs, operators conventionally made judgments by comparing changes in armature current with time changes in all Ω temperature values displayed on the temperature recorder. As a result, the operator is significantly fatigued by constant monitoring, and the judgment as to whether or not the stator coil 3 is abnormal is largely dependent on experience, resulting in erroneous judgments.
本発明は上記のような従来のものの問題点を除去するた
めになされたもので、全ての固定子コイル内部に設けた
冷却媒体通路の出口における測温素子が得た温度信号を
相互に自動比較し、発電機出力に応じて予め設定した警
報値領域外に上記自動比較した温度差が達した場合に警
報を発することができる回転電機の冷却媒体温度監視装
置を提供することを目的とするものである。これによシ
発電機の異常の早期発見、事故の未然防止あるいは運転
員の負担軽減が図れる０
〔問題点を解決するだめの手段〕
本発明は固定子コイル内の冷却媒体通路の出口における
冷却媒体温度ごとに、予め発電機出力に応じた上限およ
び下限の温度搾報値を設定しておき、上記冷却媒体通路
の出口において測定した冷却媒体温度と上記温度昔報値
との差を常時自動監視し、その差が異常に大きくなった
とき警報を発するようにしたのである。The present invention was made in order to eliminate the problems of the conventional ones as described above, and it automatically compares the temperature signals obtained by the temperature measuring elements at the exits of the cooling medium passages provided inside all stator coils. The object of the present invention is to provide a cooling medium temperature monitoring device for a rotating electrical machine that can issue an alarm when the automatically compared temperature difference reaches a value outside a preset alarm value range according to the generator output. It is. This makes it possible to detect abnormalities in the generator early, prevent accidents, and reduce the burden on operators. For each medium temperature, upper and lower limit temperature values are set in advance according to the generator output, and the difference between the coolant temperature measured at the outlet of the coolant passage and the previous temperature value is automatically calculated at all times. The system was designed to monitor and issue an alarm when the difference becomes abnormally large.
この発明によれば、冷却媒体温度を固定子コイルの各冷
却媒体通路の出口において測温素子により測定しておシ
、また、発電機出力つまり電機子電流の大きさが発電機
と主変圧器とを結ぶ紛路に入れた電流変成器によって測
定され、これらが比較演算器に入力される。一方、この
比較器よｆ器には、固定子コイル内の冷却媒体通路の出
口における冷却媒体温度ごとに、予め発電機出力に応じ
て上限および下限の温度警報値を設定した等報曲線発生
器が接続されていて、上記比較演算器が上記測定した冷
却媒体温度が上限、下限の温度伴報値領域内に入ったと
判定したとき、Ｗ報を発するように作用する。According to this invention, the coolant temperature is measured by a temperature measuring element at the outlet of each coolant passage of the stator coil, and the magnitude of the generator output, that is, the armature current is measured between the generator and the main transformer. are measured by a current transformer inserted in the connecting path, and these are input to a comparator. On the other hand, this comparator is equipped with a contour curve generator that has upper and lower temperature alarm values set in advance according to the generator output for each coolant temperature at the outlet of the coolant passage in the stator coil. is connected, and when the comparator determines that the measured coolant temperature falls within the upper and lower temperature guide value ranges, it acts to issue a W alarm.
以下、この発明の一実施例を図について説明する。第１
図において、２１は各固定子コイル３内に設けた冷却媒
体通路の出口に設けた測温素子、２２は各測温素子２１
に接続した記録計、２３は同様に接続した警報素子で、
音や光で表示するものが用いられる０また、２４は温度
監視装置で、上記冷却媒体通路の出口における冷却媒体
温度ごとに、予め発電機出力に応じて予め設定した上限
および下限の温度費報値と、上記各測温素子で測定した
温度との温度差を比較演算し、その温度差が異常となる
場合に、ｇ報装置２３に警報信号を出力するものである
。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 21 is a temperature measuring element provided at the outlet of the cooling medium passage provided in each stator coil 3, and 22 is each temperature measuring element 21.
23 is an alarm element connected in the same way,
In addition, 24 is a temperature monitoring device that displays upper and lower temperature limits preset according to the generator output for each coolant temperature at the outlet of the coolant passage. The temperature difference between this value and the temperature measured by each temperature measuring element is compared and calculated, and if the temperature difference becomes abnormal, an alarm signal is output to the g-information device 23.
第２図はかかる温度監視装置２４を具体的に示したもの
である。かかる回路では、測温素子２１の測温信号が、
測温抵抗体の抵抗値変化あるいはサーモカップルの発生
電圧の変化として、ケーブルを介して固定子コイル３ご
とに設けた各変換素子２５に入力させる。各変換素子２
５では例えば時間積分した安定なアナログ信号を出力し
、これを各比較器３０にそれぞれ入力する。一方、発電
機の電機子電流は電流変成器２７により検出し、この検
出電流を変換器２８を介して各比較器３０に入力する０
２９は警報曲線発生器で、発電機出力すなわち電機子電
流の大きさに応じて、冷却媒体温度の上限および下限の
温度警報値を二次曲線の形で発生するものである。した
がって、比較器３０は電機子電流に応じた各測温温度と
その温度警報値とを比較し、その差が異常に大きくなる
とき警報器２３に警報信号を出力する。FIG. 2 specifically shows such a temperature monitoring device 24. As shown in FIG. In such a circuit, the temperature measurement signal of the temperature measurement element 21 is
A change in the resistance value of the resistance temperature sensor or a change in the voltage generated by the thermocouple is input to each conversion element 25 provided for each stator coil 3 via a cable. Each conversion element 2
5 outputs, for example, a time-integrated stable analog signal, and inputs this to each comparator 30, respectively. On the other hand, the armature current of the generator is detected by a current transformer 27, and this detected current is input to each comparator 30 via a converter 28.
Reference numeral 29 denotes an alarm curve generator which generates upper and lower temperature alarm values of the coolant temperature in the form of a quadratic curve in accordance with the magnitude of the generator output, that is, the armature current. Therefore, the comparator 30 compares each measured temperature according to the armature current with its temperature alarm value, and outputs an alarm signal to the alarm 23 when the difference between them becomes abnormally large.
次に、上記温度監視装置の作用を第３図に示すフローチ
ャートについて具体的に説明する。Next, the operation of the temperature monitoring device will be specifically explained with reference to the flowchart shown in FIG.
（ａ） 先ず、複数の固定子コイル３ごとに設けた測
温素子２１によシ、冷却媒体温度Ｔ ｔ −Ｔｌ】を検
出するとともに、電流変成器２７から電機子電流１ｐｈ
を検出し、これらの各検出信号を変換素子２５゜２８を
通して比較器３０に読み込む。(a) First, the temperature measuring element 21 provided for each of the plurality of stator coils 3 detects the coolant temperature T t −Tl, and the armature current 1 ph is detected from the current transformer 27.
are detected and each of these detection signals is read into the comparator 30 through the conversion element 25.
（ｂ） 比較器２０に読み込んだ上記電機子電流Ｉｐ
ｈと予め設定されている定格型（Ｑ子電流とからｐ、ｕ
。(b) The armature current Ip read into the comparator 20
h and the preset rated type (Q current and p, u
.
変換した電流値１を求める０
（Ｃ） 次に、電機子電流に応じた冷却媒体温度の上
限および下限の温度警報値を二次曲課の形で予め設定し
記憶させておく。この温度警報値は冷却媒体の温度上昇
値が電機子電流工の略二乗に比例するところから、上限
がＴＡＮＮ−Ｈ＝ＡＸ Ｉ”＋ＢＸ Ｉ＋Ｃ。Determine the converted current value 1 (C) Next, the upper and lower limit temperature alarm values of the coolant temperature according to the armature current are previously set and stored in the form of a quadratic curve. Since the temperature rise value of the cooling medium is approximately proportional to the square of the armature current, the upper limit of this temperature alarm value is TANN-H=AX I"+BX I+C.
下限がＴＡＮＮ−Ｌ＝ＤＸＩ”＋ＥＸＩ＋Ｆと、適当な
余裕を持たせて第４図のように設定され、各係数Ａ、Ｂ
、Ｃ。The lower limit is set as TANN-L=DXI"+EXI+F with an appropriate margin as shown in Figure 4, and each coefficient A, B
,C.
Ｄ、Ｅ、Ｆを任意に選ぶことで、これら２つの二次曲線
の傾向を適当に設定できる。なお、固定子コイル３が正
常でも冷却媒体温度は定格電機子電流時でも約４〜５℃
の温度のばらつきがあるので、各測温素子２１に応じた
警報曲線を記憶させる必要がある。By arbitrarily selecting D, E, and F, the trends of these two quadratic curves can be set appropriately. Note that even if the stator coil 3 is normal, the coolant temperature remains approximately 4 to 5 degrees Celsius even at the rated armature current.
Since there are variations in temperature, it is necessary to store an alarm curve corresponding to each temperature measuring element 21.
（ｄｌ ここで、先ず上限の温度設定値ＴＡＮＮ−Ｈ
が上記測定温度ＴＩ −Ｔｎが大きいか否かを判定する
。(dl Here, first, the upper temperature setting value TANN-H
It is determined whether or not the above-mentioned measured temperature TI -Tn is large.
（ｅ） Ｔｌ−ＴｎのいずれかがＴＡＮＮ−Ｈよりも
大きいか等しい場合（Ｔ１〜Ｔｎ≧ＴＡＮＮ−Ｈ）には
、比較器３０は惇報装置２３に３報償号を出力する。(e) If either Tl-Tn is greater than or equal to TANN-H (T1 to Tn≧TANN-H), the comparator 30 outputs three reward signals to the notification device 23.
（ｆ） また、Ｔ１〜Ｔｎ≧ＴＡＮＮ−Ｈでない場合
において、Ｔ１〜Ｔｎ≦ＴＡＮＮ −Ｌと判定された場
合には、比較器３０は善報装置２３に警報信号を出力す
る。(f) Furthermore, in the case where T1 to Tn≧TANN-H is not satisfied, if it is determined that T1 to Tn≦TANN-L, the comparator 30 outputs an alarm signal to the good news device 23.
（ｇ）シかし、ＴＡＮＮ−Ｌ ＜ ＴＩ ” Ｔｎ ＜
ＴＡＮＮ−Ｈである場合には、冷却媒体温度が正常で
あシ、従って固定子コイルも正常に動作しているものと
して善報は発せられない。(g) Shikashi, TANN-L < TI ” Tn <
If TANN-H, the coolant temperature is normal and therefore the stator coil is also operating normally, and no good news is issued.
このように、温度信号、電機子電流信号および温度警報
値信号が比較器３０に常時とり込まれ、電機子電流に応
じて温度信号と警報曲線との対比が常時性われる。なお
、温度信号および電機子電流の大きさは、指示計器３１
によって運転員に常時示される。なお、変換装置２５、
警報曲線発生装置および比較器３０は集積回路化するこ
とにょシ、装置の小形化、大量生産化に好都合になるも
のであシ、故障の発生も最小限に抑えることができる。In this way, the temperature signal, armature current signal, and temperature alarm value signal are always taken into the comparator 30, and the temperature signal and the alarm curve are constantly compared in accordance with the armature current. Note that the magnitude of the temperature signal and armature current is determined by the indicator 31.
is constantly displayed to the operator. Note that the conversion device 25,
The alarm curve generating device and the comparator 30 can be integrated into an integrated circuit, which is advantageous for miniaturization and mass production of the device, and the occurrence of failures can be minimized.
なお、第４図では電機子電流値の大きさに関係なく上限
、下限の警報曲線と冷却媒体の温度曲線との差を略一定
にしているが、電機子電流が小さくなるほど、この差を
小さくするこ゛とにょυ、／ＪＳ電流域での固定子コイ
ル３の異常検出精度を上げることができる。In addition, in Fig. 4, the difference between the upper limit and lower limit alarm curves and the cooling medium temperature curve is kept almost constant regardless of the magnitude of the armature current value, but as the armature current becomes smaller, this difference becomes smaller. By doing so, it is possible to improve the accuracy of abnormality detection of the stator coil 3 in the /JS current range.
なお、上記実施例では固定子コイル３を水素ガスで冷却
するタービン発電機について説明したが、固定子コイル
３を水や油で冷却するタービン発電機にも応用できる。In the above embodiment, a turbine generator in which the stator coil 3 is cooled with hydrogen gas has been described, but the present invention can also be applied to a turbine generator in which the stator coil 3 is cooled with water or oil.
また、冷却媒体の温度を直接測定するほかに、各固定子
コイル間に埋込んだ測温素子によって各固定子コイルの
温度を測定するようにしてもよい。In addition to directly measuring the temperature of the cooling medium, the temperature of each stator coil may be measured by a temperature measuring element embedded between each stator coil.
以上のように、この発明によれば、複数の固定子コイル
内の冷却媒体通路の出口ごとの冷却媒体温度が、発電機
出力に応じて予め設定した上限および下限の温度ｅ報値
領域にあるか否かを常時判断して、その温度警報値信号
にある場合には警報を発するようにしたことによシ、発
電機特に固定子コイルの冷却不足による熱的あるいは絶
縁的障害の発生を迅速に認知でき、必要な保守、点検の
対策をとることができる。また、上記警報による自動監
視によって運転員の労働負担を軽減することができるな
どの効果が得られる。As described above, according to the present invention, the coolant temperature at each outlet of the coolant passage in a plurality of stator coils is within the upper and lower temperature e-report value ranges set in advance according to the generator output. By constantly determining whether the temperature is high or not, and issuing an alarm if the temperature alarm value signal is present, the occurrence of thermal or insulation failures due to insufficient cooling of the generator, especially the stator coil, can be quickly detected. It is possible to recognize the situation and take necessary maintenance and inspection measures. Moreover, the automatic monitoring using the above-mentioned warning can reduce the labor burden on the operator.
第１図は本発明の方式実施に用いられる回転電機の冷却
媒体温度監視装置の構成図、第２図は冷却媒体の温度監
視装置の回路図、第３図は第２図の回路動作の流れを示
すフローチャート、第４図は電機子電流に対する設定警
報値の関係を示すグラフ、第５図は本発明の基礎となる
タービン発電機の構造および冷却ガス通流系統を示す説
明図、第６図は同じく固定子コイル付近の断面図、第７
図は従来の冷却媒体温度監視回路の説明図、第８図は同
じ〈従来の電機子電流に対する設定警報値の関係を示す
グラフである。
図において、３は固定子コイル、４は回転子、７はガス
クーラ、１２は固定子鉄心、１６は通、風管、２１は測
温素子、２３はＲ報装置、２４は温度監視装置、２７は
電流変成器、２９は弁報曲線発生器、３０は比較器、３
１は指示計器である、なお各図中同一符号は同一または
相当部分を示す。
特゛許出願人 三菱電機株式会社
第４図
電機子ｔＬ（Ｐμ、）Fig. 1 is a configuration diagram of a cooling medium temperature monitoring device for a rotating electric machine used to implement the method of the present invention, Fig. 2 is a circuit diagram of a cooling medium temperature monitoring device, and Fig. 3 is a flowchart of the circuit operation of Fig. 2. FIG. 4 is a graph showing the relationship between the set alarm value and the armature current. FIG. 5 is an explanatory diagram showing the structure and cooling gas flow system of the turbine generator, which is the basis of the present invention. is also a cross-sectional view near the stator coil, No. 7
The figure is an explanatory diagram of a conventional coolant temperature monitoring circuit, and FIG. 8 is a graph showing the relationship between the set alarm value and the armature current in the same conventional case. In the figure, 3 is a stator coil, 4 is a rotor, 7 is a gas cooler, 12 is a stator core, 16 is a wind pipe, 21 is a temperature measuring element, 23 is an R reporting device, 24 is a temperature monitoring device, 27 is a current transformer, 29 is a valve signal generator, 30 is a comparator, 3
Reference numeral 1 denotes an indicating instrument, and the same reference numerals in each figure indicate the same or corresponding parts. Patent applicant Mitsubishi Electric Corporation Figure 4 Armature tL (Pμ,)
Claims (3)
体を流すことによつてこの固定子コイルを冷却するよう
にした回転電機において、上記冷却媒体通路の出口にお
ける冷却媒体温度ごとに、予め発電機出力に応じた上限
および下限の温度警報値を設定しておき、上記冷却媒体
通路の出口において測定した冷却媒体温度が上記温度警
報値領域に入つたとき警報を発するようにしたことを特
徴とする回転電機の冷却媒体温度監視方式。(1) In a rotating electrical machine in which the stator coil is cooled by flowing a cooling medium through a cooling medium passage provided inside the stator coil, the temperature of the cooling medium at the exit of the cooling medium passage is determined in advance. Upper and lower temperature alarm values are set according to the generator output, and an alarm is issued when the coolant temperature measured at the outlet of the coolant passage falls within the temperature alarm value range. Coolant temperature monitoring method for rotating electric machines.
式で求めたことを特徴とする特許請求の範囲第１項記載
の回転電機の冷却媒体温度監視方式。(2) A cooling medium temperature monitoring method for a rotating electric machine according to claim 1, wherein the upper and lower temperature alarm values are determined by a quadratic equation of armature current.
に継がる母線に入れた電流変成器から得るようにしたこ
とを特徴とする特許請求の範囲第１項記載の回転電機の
冷却媒体温度監視方式。(3) Cooling of the rotating electric machine according to claim 1, characterized in that the generator output is obtained from a current transformer installed in a bus bar connected to the main transformer that receives this output. Medium temperature monitoring method.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59207009A JPS6188741A (en) | 1984-10-04 | 1984-10-04 | Monitoring system of cooling medium temperature for rotary electric machine |
| CH4253/85A CH673729A5 (en) | 1984-10-04 | 1985-10-02 | |
| US06/784,302 US4733225A (en) | 1984-10-04 | 1985-10-04 | Cooling medium temperature monitoring system for rotary electric machine |
| DE3535550A DE3535550C2 (en) | 1984-10-04 | 1985-10-04 | Coolant temperature monitoring for rotating electrical machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59207009A JPS6188741A (en) | 1984-10-04 | 1984-10-04 | Monitoring system of cooling medium temperature for rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6188741A true JPS6188741A (en) | 1986-05-07 |
Family
ID=16532680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59207009A Pending JPS6188741A (en) | 1984-10-04 | 1984-10-04 | Monitoring system of cooling medium temperature for rotary electric machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6188741A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54164174A (en) * | 1978-06-16 | 1979-12-27 | Mitsubishi Electric Corp | Temperature monitor device of generator |
-
1984
- 1984-10-04 JP JP59207009A patent/JPS6188741A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54164174A (en) * | 1978-06-16 | 1979-12-27 | Mitsubishi Electric Corp | Temperature monitor device of generator |
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