CN116181546B - Method for judging sliding accident position of cylindrical valve of water turbine - Google Patents
Method for judging sliding accident position of cylindrical valve of water turbine Download PDFInfo
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- CN116181546B CN116181546B CN202211537161.5A CN202211537161A CN116181546B CN 116181546 B CN116181546 B CN 116181546B CN 202211537161 A CN202211537161 A CN 202211537161A CN 116181546 B CN116181546 B CN 116181546B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/008—Measuring or testing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/004—Valve arrangements
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Control Of Turbines (AREA)
Abstract
A method for judging the sliding accident position of a barrel valve of a water turbine comprises a barrel valve sliding state judging unit, a barrel valve sliding measuring unit, a barrel valve sliding to alarm position judging unit, a barrel valve sliding to accident position judging unit, a barrel valve sliding signal output unit and a barrel valve sliding alarm resetting unit which are sequentially and logically connected; the barrel valve sliding state judging unit judges the working state of the barrel valve in real time, judges which state the barrel valve is in a full-open state, a full-close state, an opening process, a closing process, an emergency closing process, a sliding process and an intermediate state through a control mode, a control command and barrel valve opening state information of the barrel valve, acquires state information through a barrel valve control system, comprehensively judges whether the barrel valve slides downwards or not, and sends a sliding signal to a hydropower station computer monitoring system, so that the safety and stability of a unit are protected.
Description
Technical Field
The invention belongs to the technical field of cylindrical valves of water turbines, and relates to a method for judging a sliding accident position of a cylindrical valve of a water turbine.
Background
The cylindrical valve of the water turbine is a novel water inlet control valve, and an overcurrent part is arranged between a movable guide vane and a seat ring fixed guide vane of the water turbine generator set and is only in a fully-opened or fully-closed position and is not used for flow regulation. When the unit has accidents such as runaway or failure of the water guide mechanism and the like, the movable water closing cylindrical valve is stopped; after the normal stop guide vane is closed, the cylindrical valve can be closed by still water, and the advantages are as follows:
1. When the machine is stopped, the cylinder valve is closed, so that the pressure difference between the front and the rear of the guide vane can be eliminated, the water leakage quantity is reduced, the clearance cavitation damage caused by the water leakage of the guide vane at the closing position of the guide vane is eliminated, the maintenance period is prolonged, and the guide vane is protected.
2. For the unit of the high-water head and long water diversion pipeline, the cylinder valve can be closed for preventing the guide vane of the unit from leaking water during the shutdown, so that the time from shutdown to startup can be effectively shortened, and the guide vane gap is prevented from leaking water.
3. The hydraulic loss is less, the disturbance degree of the water flow is less serious than that of a butterfly valve and a ball valve, and the dynamic load born by the water turbine is reduced.
4. The flexibility of power station operation is improved, and butterfly valve and ball valve are opened and closed soon.
5. When the water guide mechanism for the emergency failure of the unit refuses to act, water flow is cut off rapidly, the rotation of the water turbine is stopped, and the generator unit is protected.
6. The barrel valve is an effective runaway-preventing rotating speed device of the unit.
Because the cylindrical valve cylinder body of the water turbine has larger mass, 4-6 relays are generally arranged for the opening, closing and accident closing operation of the cylindrical valve. The method is provided with logics or processes of synchronous out-of-tolerance judgment, error correction control, accident closing and the like of the servomotor, but is not provided with perfect judging logics of abnormal sliding of the barrel valve, mainly comprises full-open reset delay alarming, and is designed to meet the requirement of barrel valve accident sliding judging logics of protection and shutdown of the hydroelectric generating set. Once the barrel valve slides down abnormally, the generator set still keeps running, the guide vane needs to be opened greatly to meet the standing stability requirement, so that the abnormal output of the hydroelectric generator set and the increase of mechanical vibration can cause permanent damage to a mechanical structure, and the accident expansion is caused when serious, so that the safe and stable running of a power station is seriously endangered.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for judging the sliding accident position of a cylindrical valve of a water turbine, which utilizes a cylindrical valve control system to collect state information, comprehensively judges whether the cylindrical valve slides downwards, and sends a sliding signal to a computer monitoring system of a hydropower station so as to protect the safe and stable operation of a unit.
In order to solve the technical problems, the invention adopts the following technical scheme: a method for judging the sliding accident position of a cylindrical valve of a water turbine comprises a cylindrical valve sliding state judging unit, a cylindrical valve sliding measuring unit, a cylindrical valve sliding to alarm position judging unit, a cylindrical valve sliding to accident position judging unit, a cylindrical valve sliding signal output unit and a cylindrical valve sliding alarm resetting unit which are electrically connected in sequence; the cylinder valve sliding state judging unit judges the working state of the cylinder valve in real time, judges which state the cylinder valve is in a full open state, a full close state, an opening process, a closing process, an emergency closing process, a sliding process and an intermediate state through control commands and cylinder valve opening state information of the cylinder valve, when judging that the cylinder valve has the sliding process, starts a cylinder valve sliding measuring unit, calculates cylinder valve sliding displacement, transmits the sliding displacement to the cylinder valve sliding to an alarm position judging unit and the cylinder valve sliding to an accident position judging unit, judges whether the cylinder valve sliding displacement reaches a relevant alarm value threshold value or not, sends a signal through a cylinder valve sliding signal output unit, and returns an alarm signal through a cylinder valve sliding alarm returning unit after the cylinder valve sliding fault is eliminated.
The cylindrical valve of the water turbine needs to be kept fully open all the time in the operation of the unit, when the opening of the non-instruction cylindrical valve slides down, an alarm needs to be sent out in time, and when the non-instruction cylindrical valve slides down to an accident position continuously, the stable operation of the water turbine is seriously influenced, an accident signal needs to be sent out, and a shutdown protection flow is triggered; and distinguishing whether the barrel valve is in normal action or not according to the opening signal of the barrel valve, the control mode of the barrel valve and the control command state information, if the barrel valve is in a full-open state, when the barrel valve is not in a closing command, judging the sliding quantity of the barrel valve after abnormal sliding of the barrel valve occurs, and sending an alarm signal.
The cylinder valve sliding state judging unit is used for judging the working state of the cylinder valve in real time, and the opening degree of the cylinder valve is abnormally reduced from full opening to a sliding judging threshold value or less under the condition that a cylinder valve opening flow or a cylinder valve closing flow starting command is not generated; in the step, the sliding down judging threshold is adjusted according to engineering application conditions, namely the sliding down of the barrel valve is considered, and a sliding down alarm signal of the barrel valve is sent out.
And the cylinder valve sliding displacement measuring unit is used for calculating cylinder valve sliding displacement, namely cylinder valve sliding displacement = cylinder valve full-opening-cylinder valve real-time opening.
The cylinder valve slides down to the alarm position judging unit, the sliding displacement is compared with the alarm position judging threshold, and when the sliding displacement is larger than the alarm position judging threshold, a cylinder valve slides down to an alarm position alarm signal is sent; in this step, the slip-down judgment threshold is set according to the engineering application condition.
The cylinder valve slides down to the accident position judging unit, the sliding displacement is compared with the accident position judging threshold value, and when the sliding displacement is larger than the accident position judging threshold value, a cylinder valve sliding down to the accident position alarm signal is sent out; in this step, the accident bit judgment threshold is set according to the engineering application condition.
And the barrel valve sliding signal output unit outputs a barrel valve sliding alarm signal, a barrel valve sliding accident position signal and a barrel valve sliding quantity signal.
The automatic reset of the cylinder valve sliding down alarm reset unit is that when the sliding down amount is smaller than the relative alarm threshold value, the reset is adjustable.
And the manual reset of the cylinder valve sliding down alarm reset unit is used for resetting all alarm signals when a reset button is manually pressed.
The invention has the main beneficial effects that:
The hydraulic turbine barrel valve sliding down judgment logic is realized, the opening degree of the barrel valve is monitored in real time, whether the barrel valve sliding down state is normal or not is automatically recognized, related alarm signals are not triggered when the barrel valve is normally closed and emergently closed, and the related alarm signals are triggered when the barrel valve barrel body sliding down abnormally occurs when an independent closing command.
A sleeve valve sliding quantity calculating method is designed, the sliding quantity of the sleeve valve is automatically calculated, and a sliding quantity alarming value is adjustable.
The hydraulic turbine barrel valve control system is applicable to hydraulic turbine barrel valve control systems based on programmable controllers, programmable computer controllers and special controllers.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a block diagram of the determination of the slip-down accident position of the barrel valve of the hydraulic turbine according to the present invention.
Fig. 2 is a flow chart for judging the sliding state of the barrel valve according to the present invention.
FIG. 3 is a flow chart of the calculation of the spool valve slip amount according to the present invention.
FIG. 4 is a flow chart of the determination of the position of the spool valve sliding down to the alarm position according to the present invention.
Fig. 5 is a flow chart of the determination of the position of an accident by sliding down the spool valve according to the present invention.
In the figure: the device comprises a barrel valve sliding state judging unit 1, a barrel valve sliding measuring unit 2, a barrel valve sliding to alarm position judging unit 3, a barrel valve sliding to accident position judging unit 4, a barrel valve sliding signal output unit 5 and a barrel valve sliding alarm resetting unit 6.
Detailed Description
As shown in fig. 1 to 5, a method for judging a sliding accident position of a barrel valve of a water turbine comprises a barrel valve sliding state judging unit 1, a barrel valve sliding measuring unit 2, a barrel valve sliding to alarm position judging unit 3, a barrel valve sliding to accident position judging unit 4, a barrel valve sliding signal output unit 5 and a barrel valve sliding alarm resetting unit 6 which are electrically connected in sequence; the barrel valve sliding state judging unit 1 judges the working state of the barrel valve in real time, judges which state the barrel valve is in a full-open state, a full-close state, an opening process, a closing process, an emergency closing process, a sliding process and an intermediate state through control mode, control command and barrel valve opening state information of the barrel valve, when judging that the barrel valve has the sliding process, the barrel valve sliding measuring unit 2 is started, barrel valve sliding displacement is calculated, the sliding displacement is transmitted to the barrel valve sliding to alarm position judging unit 3 and the barrel valve sliding to accident position judging unit 4, whether the barrel valve sliding displacement reaches a relevant alarm value threshold value or not is judged, signals are sent out through the barrel valve sliding signal output unit 5, and after the barrel valve sliding fault is eliminated, alarm signals are restored through the barrel valve sliding alarm restoring unit 6. When the intelligent hydraulic control system is used, the barrel valve control system is used for collecting state information, comprehensively judging whether the barrel valve slides downwards or not, and sending a sliding signal to the hydropower station computer monitoring system, so that the safety and stability of the unit are protected.
In the preferable scheme, the cylindrical valve of the water turbine needs to be kept fully open all the time in the running process of the unit, when the opening of the non-instruction cylindrical valve slides down, an alarm needs to be sent out in time, and when the non-instruction cylindrical valve slides down to an accident position, the stable running of the water turbine is seriously influenced, an accident signal needs to be sent out, and a shutdown protection flow is triggered; and distinguishing whether the barrel valve is in normal action or not according to the opening signal of the barrel valve, the control mode of the barrel valve and the control command state information, if the barrel valve is in a full-open state, when the barrel valve is not in a closing command, judging the sliding quantity of the barrel valve after abnormal sliding of the barrel valve occurs, and sending an alarm signal. The method aims at monitoring the opening of the barrel valve in real time and automatically identifying whether the sliding state of the barrel valve is normal or not.
In the preferred scheme, the barrel valve sliding state judging unit 1 judges the working state of the barrel valve in real time, and the opening degree of the barrel valve is abnormally reduced from full opening to less than or equal to a sliding judging threshold value under the condition that no opening barrel valve flow or closing barrel valve flow starting command exists; in the step, the sliding down judging threshold is adjusted according to engineering application conditions, namely the sliding down of the barrel valve is considered, and a sliding down alarm signal of the barrel valve is sent out. The purpose is that the related alarm signal is not triggered during normal closing and emergency closing.
In a preferred embodiment, the cylinder valve sliding displacement amount measuring unit 2 calculates cylinder valve sliding displacement, that is, cylinder valve sliding displacement amount=cylinder valve full open degree-cylinder valve real-time opening degree. The method aims at designing a sleeve valve sliding quantity calculating method and automatically calculating the sliding quantity of the sleeve valve.
In the preferred scheme, the barrel valve slides down to the alarm position judging unit 3, the sliding displacement is compared with the alarm position judging threshold value, and when the sliding displacement is larger than the alarm position judging threshold value, a barrel valve slides down to an alarm position alarm signal is sent; in this step, the slip-down judgment threshold is set according to the engineering application condition. The cylinder valve aims to trigger related alarm signals when abnormal sliding of the cylinder valve cylinder body occurs when a closing command is not met.
In the preferred scheme, the barrel valve slides down to the accident position judging unit 4, the sliding displacement is compared with the accident position judging threshold value, and when the sliding displacement is larger than the accident position judging threshold value, a barrel valve slides down to an accident position alarm signal is sent; in this step, the accident bit judgment threshold is set according to the engineering application condition. In this step, the accident bit judgment threshold is greater than the alarm bit judgment threshold.
In a preferred scheme, the barrel valve sliding signal output unit 5 outputs a barrel valve sliding alarm signal, a barrel valve sliding to accident position signal and a barrel valve sliding amount signal.
In the preferred scheme, the automatic reset of the cylinder valve sliding down alarm reset unit 6 is realized, and when the sliding down amount is smaller than the related alarm threshold value, namely the reset difference, the alarm signal is automatically reset, and the reset difference is adjustable. The purpose is that the slip-down quantity alarm value can be adjusted.
In the preferred embodiment, the manual reset of the cylinder valve slide-down alarm reset unit 6 resets all alarm signals when the reset button is manually pressed.
The method is applicable to hydraulic turbine barrel valve control systems based on programmable controllers, programmable computer controllers and special controllers.
The above embodiments are merely preferred embodiments of the present application, and should not be construed as limiting the present application, and the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without collision. The protection scope of the present application is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this application are also within the scope of the application.
Claims (7)
1. A method for judging a sliding accident position of a cylindrical valve of a water turbine is characterized by comprising the following steps: the device comprises a barrel valve sliding state judging unit (1), a barrel valve sliding measuring unit (2), a barrel valve sliding to alarm position judging unit (3), a barrel valve sliding to accident position judging unit (4), a barrel valve sliding signal output unit (5) and a barrel valve sliding alarm resetting unit (6) which are electrically connected in sequence; the cylinder valve sliding state judging unit (1) judges the working state of the cylinder valve in real time, judges which state the cylinder valve is in a full open state, a full close state, an opening process, a closing process, an emergency closing process, a sliding process and an intermediate state according to the control mode, the control command and the cylinder valve opening state information of the cylinder valve, when judging that the cylinder valve has the sliding process, the cylinder valve sliding measuring unit (2) is started, the cylinder valve sliding displacement is calculated, the sliding displacement is transmitted to the cylinder valve sliding to the alarm position judging unit (3) and the cylinder valve sliding to the accident position judging unit (4), whether the cylinder valve sliding displacement reaches a relevant alarm value threshold value or not is judged, signals are sent out through the cylinder valve sliding signal output unit (5), and after the cylinder valve sliding fault is eliminated, the cylinder valve sliding alarm signal is restored through the cylinder valve sliding alarm restoring unit (6);
The cylindrical valve of the water turbine needs to be kept fully open all the time in the operation of the unit, when the opening of the non-instruction cylindrical valve slides down, an alarm needs to be sent out in time, and when the non-instruction cylindrical valve slides down to an accident position continuously, an accident signal needs to be sent out, and a shutdown protection flow is triggered, otherwise, the stable operation of the water turbine is seriously influenced; distinguishing whether the barrel valve is in normal action or not according to the opening signal of the barrel valve, the control mode of the barrel valve and the control command state information, if the barrel valve is in a full-open state, when the barrel valve is not in a closing command, judging the sliding quantity of the barrel valve after abnormal sliding of the barrel valve occurs, and sending an alarm signal;
a barrel valve sliding state judging unit (1) for judging the working state of the barrel valve in real time, wherein the opening degree of the barrel valve is abnormally reduced from full opening to a sliding judging threshold value or less under the condition that a barrel valve opening flow or a barrel valve closing flow starting command is not provided; in the step, the sliding down judging threshold is adjusted according to engineering application conditions, namely the sliding down of the barrel valve is considered, and a sliding down alarm signal of the barrel valve is sent out.
2. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 1, wherein the method comprises the following steps: and a cylinder valve sliding amount measuring unit (2) for calculating cylinder valve sliding displacement, namely cylinder valve sliding displacement amount = cylinder valve full-opening degree-cylinder valve real-time opening degree.
3. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 1, wherein the method comprises the following steps: the barrel valve slides down to an alarm position judging unit (3), the sliding displacement is compared with an alarm position judging threshold value, and when the sliding displacement is larger than the alarm position judging threshold value, a barrel valve slides down to an alarm position alarm signal is sent; in this step, the slip-down judgment threshold is set according to the engineering application condition.
4. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 1, wherein the method comprises the following steps: the barrel valve slides down to an accident position judging unit (4) to compare the sliding displacement with an accident position judging threshold value, and when the sliding displacement is larger than the accident position judging threshold value, a barrel valve slides down to an accident position alarm signal is sent; in this step, the accident bit judgment threshold is set according to the engineering application condition.
5. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 1, wherein the method comprises the following steps: and the barrel valve sliding signal output unit (5) outputs a barrel valve sliding alarm signal, a barrel valve sliding to accident position signal and a barrel valve sliding amount signal.
6. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 1, wherein the method comprises the following steps: the cylinder valve sliding down alarm reset unit (6) automatically resets when the sliding down amount is smaller than the relevant alarm threshold value-reset difference, and the alarm signal automatically resets and the reset difference is adjustable.
7. The method for judging the sliding accident position of the barrel valve of the water turbine according to claim 6, wherein the method comprises the following steps: and the manual reset of the cylinder valve sliding down alarm reset unit (6) is used for resetting all alarm signals when a reset button is manually pressed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211537161.5A CN116181546B (en) | 2022-12-02 | 2022-12-02 | Method for judging sliding accident position of cylindrical valve of water turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211537161.5A CN116181546B (en) | 2022-12-02 | 2022-12-02 | Method for judging sliding accident position of cylindrical valve of water turbine |
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| CN116181546A CN116181546A (en) | 2023-05-30 |
| CN116181546B true CN116181546B (en) | 2024-05-10 |
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| CN202211537161.5A Active CN116181546B (en) | 2022-12-02 | 2022-12-02 | Method for judging sliding accident position of cylindrical valve of water turbine |
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| CN117969077A (en) * | 2024-04-02 | 2024-05-03 | 华能澜沧江水电股份有限公司 | Method and device for monitoring step-out fault of cylinder valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543071A1 (en) * | 1991-11-21 | 1993-05-26 | Ente Nazionale Per L'energia Elettrica - (Enel) | A distributor for a reaction water turbine |
| JP2001090648A (en) * | 1999-09-22 | 2001-04-03 | Mitsubishi Heavy Ind Ltd | Speed governor for water turbine for generator |
| CN108843479A (en) * | 2018-06-28 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Cylindrical valve overcurrent characteristic test method and measuring device |
| CN113777992A (en) * | 2021-09-16 | 2021-12-10 | 中国长江电力股份有限公司 | Method for lifting gate of hydropower station in gliding way and alarming |
-
2022
- 2022-12-02 CN CN202211537161.5A patent/CN116181546B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0543071A1 (en) * | 1991-11-21 | 1993-05-26 | Ente Nazionale Per L'energia Elettrica - (Enel) | A distributor for a reaction water turbine |
| JP2001090648A (en) * | 1999-09-22 | 2001-04-03 | Mitsubishi Heavy Ind Ltd | Speed governor for water turbine for generator |
| CN108843479A (en) * | 2018-06-28 | 2018-11-20 | 中国电建集团华东勘测设计研究院有限公司 | Cylindrical valve overcurrent characteristic test method and measuring device |
| CN113777992A (en) * | 2021-09-16 | 2021-12-10 | 中国长江电力股份有限公司 | Method for lifting gate of hydropower station in gliding way and alarming |
Non-Patent Citations (1)
| Title |
|---|
| 殷保合等.《小浪底水利枢纽运行管理 发电卷》.黄河水利出版社,2011,第207-210页. * |
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