JPS5926790B2 - Hydro turbine overspeed detection device - Google Patents
Hydro turbine overspeed detection deviceInfo
- Publication number
- JPS5926790B2 JPS5926790B2 JP51040306A JP4030676A JPS5926790B2 JP S5926790 B2 JPS5926790 B2 JP S5926790B2 JP 51040306 A JP51040306 A JP 51040306A JP 4030676 A JP4030676 A JP 4030676A JP S5926790 B2 JPS5926790 B2 JP S5926790B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- overspeed detection
- overspeed
- output
- hydraulic turbine
- 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
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Hydraulic Turbines (AREA)
- Control Of Water Turbines (AREA)
Description
【発明の詳細な説明】
本発明は、フランシス形水力反動タービンなどの水力タ
ービンの過速度検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overspeed detection device for a hydraulic turbine, such as a Francis-type hydraulic reaction turbine.
水力タービンにおいては、ランチ等の回転部の異常速度
上昇を保護するために、第１図に示すように過速度検出
リレー１を設け、その出力を保護装置２に加え、機器を
自動的に停止させるなどの対策がなされている。In hydraulic turbines, in order to protect rotating parts such as launchers from abnormal speed increases, an overspeed detection relay 1 is installed as shown in Figure 1, and its output is applied to a protection device 2 to automatically stop the equipment. Measures are being taken to prevent
ところで、従来の水力タービンは落差、回転数が低（、
単機出力に比べ回転部のはずみ車効果（ＣＤ２ ）が大
きいため、水力タービンの比速度が太き（なり、第２図
に示ずように、負荷遮断後の速度上昇ｖ２ （通常、定
格速度■１ の１３０〜１５０％）と水力タービンの最
大無拘束速度Ｖ３（通常、定格速度Ｖ１の１５０〜１８
０％）との間には差がある。By the way, conventional water turbines have low head and low rotation speed (,
Since the flywheel effect (CD2) of the rotating part is large compared to the single machine output, the specific speed of the hydraulic turbine is large (as shown in Figure 2, the speed increase after load shedding v2 (normally, the rated speed ■1 (130-150% of the rated speed V1) and the maximum unrestrained speed V3 of the hydraulic turbine (usually 150-18% of the rated speed
0%).
そのため、過速度検出リレー１は負荷遮断後の速度上昇
Ｖ２より数条高い位置に動作［直Ｖ４ を整定し、それ
によって過速度を検出し保護装置２でガイドベーンを閉
め込むなどして速度上昇を低（抑え、異常速度上昇に対
し回転部を保護している。Therefore, the overspeed detection relay 1 operates at a position several steps higher than the speed increase V2 after the load is cut off. This protects the rotating parts from abnormal speed increases.
ところで、最近、水力タービンは高落査、大容量化され
て来ており、また、建設場所の関係もあって、水路ま長
（、水路流速は速くなり、水力タービンの比速度は小さ
くなっており、最大無拘束速度は低くなる傾向にある。By the way, recently, hydraulic turbines have become higher in height and larger in capacity, and due to the location of construction, waterways have become longer (and waterway flow speeds have become faster), and the specific speed of hydropower turbines has become smaller. Therefore, the maximum unrestrained speed tends to be low.
一方、高速化に伴なって回転部のはずみ車効果は小さく
なるため、水力タービンの水力特性との関係で、負荷遮
断後の速度上昇率は高くなり、場合によっては、第４図
に示すように、負荷遮断後の速度上昇Ｖ２が最大無拘束
速度ｖ３より太き（なる。On the other hand, as the speed increases, the flywheel effect of the rotating part decreases, so in relation to the hydraulic characteristics of the hydraulic turbine, the speed increase rate after load shedding increases, and in some cases, as shown in Figure 4, the speed increase rate increases. , the speed increase V2 after load shedding is greater than the maximum unrestrained speed V3.
このような水力タービンにおいて、第２図のように、負
荷遮断後の速度上昇■２ より高く過速度検出リレーの
動作］直Ｖ４を設定した場合、その整定１ｉｉＶ、は起
り得ない速度であり、過速度検出リレーの機能を失って
、異常速度上昇に対する保護がなされないことになる。In such a water turbine, as shown in Fig. 2, if the speed increase after load shedding is set to 2 (operation of overspeed detection relay) directly V4, the setting 1iiV is a speed that cannot occur. The function of the overspeed detection relay is lost, and there is no protection against abnormal speed increases.
そこで、過速度検出リレーの機能を持たせるため、第４
図のように、定格速度■、と最大無拘束速度Ｖ３との間
に過速度検出リレーの動作匝■４を整定すると、正常運
転時は、電気的に系統に接続されており、定格速度Ｖ１
を大きく越えて過速度検出リレーが動作することは
な（、また、このリレーが動作するような上昇があった
場合には、ガイドベーンを閉める等の方法で保護を行な
っても支障はない。Therefore, in order to provide the function of overspeed detection relay, the fourth
As shown in the figure, if the overspeed detection relay's operating point ■4 is set between the rated speed ■ and the maximum unrestrained speed V3, during normal operation it is electrically connected to the grid and the rated speed V1
(Also, if there is a rise that would cause this relay to operate, there is no problem in protecting it by closing the guide vane, etc.).
しかしながら、試運転時に負荷遮断試験を行なう場合に
過速度検出リレーが動作することは不都合であるので、
異常な速度上昇が起り易い状態の時、過速度検出リレー
を外して試験する必要がある。However, it is inconvenient for the overspeed detection relay to operate when performing a load shedding test during trial operation.
When abnormal speed increases are likely to occur, it is necessary to remove and test the overspeed detection relay.
また、単独送電へ移行するような場合にも速度上昇が起
り、過速度検出リレーが動作し、単独送電へ移行できな
いなどの問題が生ずる。Further, even when shifting to independent power transmission, the speed increases and the overspeed detection relay operates, causing problems such as not being able to shift to independent power transmission.
本発明は、負荷遮断後の速度上昇が最大無拘束速度を越
える場合に、過速度検出リレーの整定１直を定格速度と
最大無拘束速度との間に定め、かつ、このリレーの動作
が一定時間以上持続した時に保護を行なうことにより、
一時的に起る過速度によって保護装置が動作しないよう
にした過速度検出装置を提供するものである。In the present invention, when the speed increase after load shedding exceeds the maximum unrestricted speed, the overspeed detection relay is set for one shift between the rated speed and the maximum unrestricted speed, and the operation of this relay is constant. By providing protection when it lasts for more than an hour,
The present invention provides an overspeed detection device that prevents a protection device from operating due to temporary overspeed.
第３図は本発明による過速度検出装置の一実施例を示す
もので、１は水力タービンの速度が所定の整定（直を超
えた時動作する過速度検出リレー、３は、この検出リレ
ー１が一定時間以上動作が継続した時出力を生ずるタイ
マ、２は水力タービンの回転部を保護するための保護装
置である。FIG. 3 shows an embodiment of the overspeed detection device according to the present invention, in which 1 is an overspeed detection relay that operates when the speed of the hydraulic turbine exceeds a predetermined setting (speed); 3 is this detection relay 1; A timer 2 generates an output when the operation continues for a certain period of time, and 2 is a protection device for protecting the rotating part of the water turbine.
そして、過速度検出リレー１の動作［直■４は、第４図
に示すようＫ、定格速度■１ と最大無拘束速度Ｖ３
との間で整定されている。Then, the operation of overspeed detection relay 1 [direction 4 is K as shown in Fig. 4, rated speed 1 and maximum unrestricted speed V3]
It has been settled between
このような構成において、負荷遮断によって発生する速
度が整定匝ｖ４を超えて過速度検出リレー１が動作した
場合、その動作の持続時間をタイマ３で検出し、所定の
持続時間を越えた場合、正常時では起り得ない速度と判
断し、保護装置２を働かせて、ガイドベーンを閉める等
の操作を行なう。In such a configuration, when the speed generated by load shedding exceeds the setting speed v4 and the overspeed detection relay 1 operates, the timer 3 detects the duration of the operation, and if the duration exceeds a predetermined duration, It is determined that the speed is impossible under normal conditions, and the protective device 2 is activated to perform operations such as closing the guide vane.
このようにすれば、試運転時あるいは単独送電への移行
時に生ずる一時的な過速度によって、保護装置が働（こ
とはな（、適正な保護が行なえることになる。In this way, the protection device will not be activated due to temporary overspeed that occurs during trial operation or transition to independent power transmission, and appropriate protection can be provided.
また、過速度検出リレーが電気的な外乱あるいは振動な
どにより、一時的な誤動作をした場合によって保護装置
が影響されるのを防止できる。Further, it is possible to prevent the protection device from being affected even if the overspeed detection relay temporarily malfunctions due to electrical disturbance or vibration.
なお、上記した実施例では過速度検出リレーを用いた場
合について説明したが、所定整定１直を超えた時出力を
生ずるものであれば何でもよい。Incidentally, in the above-mentioned embodiment, a case was explained in which an overspeed detection relay was used, but any relay may be used as long as it generates an output when a predetermined set of one shift is exceeded.
以上述べたように、本発明によれば、水力タービン速度
が一定時間以上整定（直を越えた時、保護装置を働かせ
ることにより、一時的な過速度による保護装置の動作を
防止することができる。As described above, according to the present invention, when the hydraulic turbine speed is stabilized for a certain period of time or more, the protection device is activated to prevent the protection device from operating due to temporary overspeed. .
第１図は従来の過速度検出装置のブロック図、第２図は
従来の過速度整定１直の関係を示す説明図、第３図は本
発明による過速度検出装置の一実施例のブロック図、第
４図は本発明の過速度整定１直の関係を示す説明図であ
る。
符号の説明、１・・・・・・過速度検出リレー、２・・
・・・・保護装置、３・・・・・・タイマ、Ｖｌ・・・
・・・定格速度、■２・・・・・速度上昇率、ｖ３・・
・・・・最大無拘束速度ｙ４・・・・・・整定直。Fig. 1 is a block diagram of a conventional overspeed detection device, Fig. 2 is an explanatory diagram showing the relationship between the conventional overspeed settling single shift, and Fig. 3 is a block diagram of an embodiment of the overspeed detection device according to the present invention. , FIG. 4 is an explanatory diagram showing the relationship between overspeed settling and one shift of the present invention. Explanation of symbols, 1... Overspeed detection relay, 2...
...Protective device, 3...Timer, Vl...
...Rated speed, ■2...Speed increase rate, v3...
... Maximum unrestrained speed y4 ... Settling straight.
Claims (1)
力タービンにおいて、前記最大無拘束速度と定格速度と
の間に整定（直を有し、前記水力タービンの速度が前記
整定［直を越えた時、検出出力を生ずる過速度検出手段
と、該検出手段の検出出力が所定時間持続された時出力
を生ずる持続検出手段と、該持続検出手段の出力により
、前記水力タービンの保護を行なう保護手段とからなる
ことを特徴とする水力タービンの過速度検出装置。1. In a hydraulic turbine whose speed increase after load shedding exceeds the maximum unrestrained speed, there is a settling (direction) between the maximum unrestrained speed and the rated speed, and the speed of the hydraulic turbine exceeds the said settling [direction]. an overspeed detection means that generates a detected output when the detection output of the detection means is sustained for a predetermined time, a duration detection unit that produces an output when the detection output of the detection unit is sustained for a predetermined time, and a protection unit that protects the hydraulic turbine using the output of the duration detection unit. An overspeed detection device for a hydraulic turbine, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51040306A JPS5926790B2 (en) | 1976-04-12 | 1976-04-12 | Hydro turbine overspeed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51040306A JPS5926790B2 (en) | 1976-04-12 | 1976-04-12 | Hydro turbine overspeed detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52124547A JPS52124547A (en) | 1977-10-19 |
| JPS5926790B2 true JPS5926790B2 (en) | 1984-06-30 |
Family
ID=12576923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51040306A Expired JPS5926790B2 (en) | 1976-04-12 | 1976-04-12 | Hydro turbine overspeed detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926790B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4915732A (en) * | 1972-05-31 | 1974-02-12 |
-
1976
- 1976-04-12 JP JP51040306A patent/JPS5926790B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4915732A (en) * | 1972-05-31 | 1974-02-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52124547A (en) | 1977-10-19 |
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