CN111778916B - Pressure regulating device for improving operation flexibility of hydropower station and operation method thereof - Google Patents
Pressure regulating device for improving operation flexibility of hydropower station and operation method thereof Download PDFInfo
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- CN111778916B CN111778916B CN202010617166.3A CN202010617166A CN111778916B CN 111778916 B CN111778916 B CN 111778916B CN 202010617166 A CN202010617166 A CN 202010617166A CN 111778916 B CN111778916 B CN 111778916B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
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- 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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Abstract
The invention discloses a pressure regulating device for improving the operation flexibility of a hydropower station and an operation method thereof, wherein the pressure regulating device comprises a pressure regulating chamber and further comprises: the vent hole is arranged at the top of the pressure regulating chamber and is used for communicating the pressure regulating chamber with the outside; the electric valve is arranged inside the vent hole, and a safety valve is arranged on the electric valve; the pressure sensor is arranged at the bottom of the pressure regulating chamber and used for monitoring the water pressure in the pressure regulating chamber; and the control system is arranged in the vent hole and is respectively connected with the electric valve and the pressure sensor through cables. The device can effectively reduce the fluctuation amplitude of the water level in the pressure regulating chamber caused by the load change of the unit, further reduce the overflow elevation of the pressure regulating chamber, finally realize the purposes of reducing the excavation amount of the pressure regulating chamber and reducing the engineering investment, and meanwhile, the device can also accelerate the attenuation of the water level in the pressure regulating chamber, reduce the grid-connected waiting time after the load shedding of the unit and improve the power generation benefit of the hydropower station.
Description
Technical Field
The invention relates to a pressure regulating device for improving the operation flexibility of a hydropower station, in particular to a pressure regulating device which can reduce the surge amplitude of a pressure regulating chamber, accelerate the surge attenuation of the pressure regulating chamber and further improve the operation flexibility of the hydropower station.
Background
In a long water diversion type or long tail water type power station, in order to relieve the water hammer pressure in the starting and stopping process of a unit, a surge chamber is always arranged at the joint of a pressure pipeline and a water delivery tunnel, and the free water surface of the surge chamber is utilized to reflect water hammer waves so as to meet the technical requirement of unit regulation and guarantee. The pressure regulating chambers can be generally divided into simple pressure regulating chambers, impedance pressure regulating chambers, differential pressure regulating chambers, water chamber pressure regulating chambers, air cushion pressure regulating chambers and the like according to the arrangement form of the pressure regulating chambers, and different pressure regulating chambers have different regulating characteristics.
The impedance type pressure regulating chamber is the most commonly used type of pressure regulating chamber and is widely applied to conventional hydropower stations and pumped storage power stations, on one hand, the impedance type pressure regulating chamber can effectively reflect a water hammer, and on the other hand, due to the existence of the bottom impedance hole, the water level fluctuation amplitude in the pressure regulating chamber is reduced. However, even if an impedance type surge chamber is adopted in a hydropower station with a particularly long water diversion system or tail water system, the fluctuation of the water level of the surge chamber caused by the load increase/dump of the unit is still very large, and particularly the highest surge water level of the surge chamber is possibly far higher than the water level of the surge chamber in normal operation. For the problem, the existing engineering measures are that an enlarged upper chamber, an open channel type upper chamber and the like are generally adopted on the basis of an impedance type pressure regulating chamber, the excavation amount of the pressure regulating chamber is greatly increased, in addition, the water level fluctuation for a long time is inevitably caused by a large water level fluctuation amplitude, therefore, the grid-connected waiting time after the load shedding of the unit is increased, and the economic benefit of the hydropower station is reduced. The other solution is to construct an air cushion chamber pressure regulating chamber, but the surrounding rock is required to have a very good air closing effect and can bear high air pressure for a long time, and the support cross section of the air cushion pressure regulating chamber is large, so that the diameter of the pressure regulating chamber is very large, and the requirement on the stability of the surrounding rock is very high.
Based on the situation, the invention provides the pressure regulating device for improving the operation flexibility of the hydropower station and the operation method thereof, and the problems can be effectively solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides the pressure regulating device for improving the operation flexibility of the hydropower station and the operation method thereof, can effectively reduce the fluctuation range of the water level in the pressure regulating chamber caused by the load change of a unit, further reduce the overflow elevation of the pressure regulating chamber, finally realize the purposes of reducing the excavation amount of the pressure regulating chamber and reducing the engineering investment, and meanwhile, the device can also accelerate the attenuation of the water level in the pressure regulating chamber, reduce the grid-connected waiting time after the load shedding of the unit and improve the power generation benefit of the hydropower station.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the utility model provides an improve power station operation flexibility's pressure regulating device, includes the surge-chamber, still includes:
the vent hole is arranged at the top of the pressure regulating chamber and is used for communicating the pressure regulating chamber with the outside;
the electric valve is arranged inside the vent hole, and a safety valve is arranged on the electric valve;
the pressure sensor is arranged at the bottom of the pressure regulating chamber and used for monitoring the water pressure in the pressure regulating chamber;
and the control system is arranged in the vent hole and is respectively connected with the electric valve and the pressure sensor through cables.
The invention provides an operation method of a pressure regulating device for improving the operation flexibility of a hydropower station, wherein the pressure regulating device has two operation modes, the first mode is an unregulated mode, and the second mode is a regulated mode; when the electric valve runs stably, the control system is in an unregulated mode, and the electric valve is always kept in an open state; when the water level of the pressure regulating chamber continuously rises or falls within 30s and exceeds 2m, the control system enters a regulating mode.
According to the above technical solution, as a further preferable technical solution of the above technical solution, the specific steps of the adjusting mode are:
firstly, quickly closing an electric valve;
secondly, when the water level of the pressure regulating chamber rises to the highest point, the electric valve is quickly opened and kept for a period of time, and then is quickly closed;
thirdly, when the water level of the pressure regulating chamber drops to the lowest point, the electric valve is quickly opened and kept for a period of time, and then is quickly closed;
and fourthly, repeating the second step and the third step until the water level variation amplitude of the highest point and the lowest point in the water level fluctuation cycle of the pressure regulating chamber is less than 2m, ending the regulating mode, and enabling the pressure regulating device to enter the non-regulating mode.
Specifically, the principle of judging that the water level of the surge chamber rises to the highest point is as follows: the pressure measured by the pressure sensor is gradually increased, the speed is increased more and more slowly at the same time until the speed is increased to zero, and then the pressure is gradually reduced, and the speed is reduced more and more quickly at the same time.
Specifically, the principle of judging that the water level of the surge chamber is lowered to the lowest point is as follows: the pressure measured by the pressure sensor is gradually reduced, and the reducing speed is gradually reduced until the reducing speed is zero, and then the pressure is gradually increased, and the speed is increased more and more.
According to the technical scheme, as a further preferable technical scheme of the technical scheme, the time for rapidly closing and rapidly opening the electric valve is 10s, and the holding time is 30 s.
According to the above aspect, as a more preferable aspect of the above aspect, the relief valve is opened at an opening pressure of 10mWC, and when the pressure inside the pressure chamber is lower than the atmospheric pressure of 10 mWC.
According to the above technical solution, as a further preferable technical solution of the above technical solution, the pressure regulating device reduces the highest surge water level of the pressure regulating chamber, and can be calculated by the following formula:
H(1，max)+10＝H(2，max)+10Z(2，0)/(Z(2，0)-H(2，max))
wherein H(1，max)When no device is present, the water level in the surge chamber rises, H(2，max)For pressure-regulating water level rising with devices, Z(2，0)The air height of the pressure chamber is adjusted in the initial state.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the invention, the gas pressure in the pressure regulating chamber is controlled by opening and closing the electric valve, when the water level of the pressure regulating chamber rises, the gas pressure is provided to block the water level of the pressure regulating chamber from rising, so that the highest surge water level of the pressure regulating chamber is reduced, when the water level of the pressure regulating chamber is reduced, the gas pressure is reduced to block the water level of the pressure regulating chamber from reducing, so that the lowest surge water level of the pressure regulating chamber is raised, and finally the purposes of reducing the overflow elevation of the pressure regulating chamber, raising the low elevation of the pressure regulating chamber, reducing the excavation amount and reducing the engineering cost are achieved.
Drawings
FIG. 1 is a schematic view of the pressure regulating apparatus of the present invention;
FIG. 2 is a layout view of the electrically operated valve and the safety valve of the present invention;
FIG. 3 is a schematic structural view of the present invention when the water level in the surge chamber rises;
FIG. 4 is a schematic structural diagram of the present invention when the water level in the surge chamber reaches the highest point and begins to drop;
FIG. 5 is a water level variation process line of the surge chamber before and after installation of the apparatus of the present invention.
Reference numerals: 1-a surge chamber; 2-a vent hole; 3-a pressure sensor; 4-an electrically operated valve; 5-a control system; 6-safety valve.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The technical features (the components/elements of the present invention) of the control system, the pressure sensor, the electric valve, the safety valve, etc. described in the present invention are all obtained from conventional commercial sources or manufactured by conventional methods, and the specific structure, the operation principle, and the control mode and the spatial arrangement mode that may be involved are all conventional choices in the field, which should not be regarded as the innovative points of the present invention, and it is understood to those skilled in the art that the present invention is not further specifically described in detail.
As shown in fig. 1, a pressure regulating device for improving operation flexibility of a hydropower station comprises a pressure regulating chamber 1 and a diversion tunnel communicated with the bottom of the pressure regulating chamber, and further comprises:
the vent hole 2 is arranged at the top of the pressure regulating chamber 1 and is used for communicating the pressure regulating chamber 1 with the outside;
an electric valve 4 arranged inside the vent hole 2, and a safety valve (6) is arranged on the electric valve 4;
the pressure sensor 3 is arranged at the bottom of the pressure regulating chamber 1 and used for monitoring the water pressure in the pressure regulating chamber 1;
and the control system 5 is arranged inside the vent hole 2 and is respectively connected with the electric valve 4 and the pressure sensor 3 through cables.
Fig. 2 shows the layout of the electric valve 4 and the safety valve 6 of the present invention, and the safety valve 6 is used for opening when the pressure inside the pressure regulating chamber is lower than the atmospheric pressure of 10mWC, so as to ensure that the pressure inside the pressure regulating chamber is not lower than the atmospheric pressure of 10 mWC.
The pressure regulating device can be used for an upstream pressure regulating chamber and a downstream pressure regulating chamber, and can reduce the highest water level of the pressure regulating chamber and improve the lowest water level of the pressure regulating chamber.
The pressure sensor 3 monitors the water pressure in the pressure regulating chamber 1 in real time, namely the water level of the pressure regulating chamber 1 (the most common conversion of one atmospheric pressure in the engineering is 1 atmospheric pressure which is 10m water column (10mWC)), the water level of the pressure regulating chamber 1 changes along with the change of the water level of the reservoir and the flow of the unit, under the condition that the unit of the hydropower station is stably operated, the flow of the unit changes slightly, the change of the upstream water level is slow, so the water level of the pressure regulating chamber also keeps constant water level or changes slowly, the device is operated in an unregulated mode, and the electric valve 4 always keeps an open state.
When the unit gets rid of the load, rivers in the diversion tunnel gush into surge-chamber 1, and surge-chamber 1 water level rises fast, and the pressure that pressure sensor 3 measured can rise fast in the short time, and when surge-chamber water level rose in 30s time in succession and exceeded 2m, control system got into the regulation mode.
In the first step, the device control system 5 sends a valve closing signal to the electric valve 4, and the electric valve 4 is closed quickly for 10s and keeps in a closed state, as shown in fig. 3. The water level of the pressure regulating chamber 1 continues to rise, the air pressure at the top of the pressure regulating chamber 1 is increased, the high-pressure air can block the rise of the water level of the pressure regulating chamber 1, and then when the water level of the pressure regulating chamber 1 rises to the highest point, the air pressure at the top of the pressure regulating chamber 1 also reaches the maximum. In the process, the pressure monitored by the pressure sensor 3 is larger, the pressure is accelerated more and more slowly until the pressure is zero, then the pressure is reduced, and when the pressure measured by the pressure sensor 3 begins to be reduced, the second step is carried out.
Secondly, the control system 5 sends a valve opening signal to the electric valve 4, the electric valve 4 is opened rapidly for 10s, and is kept in an open state for 30s, and the pressure regulating chamber 1 releases high-pressure gas through the valve, so that the pressure inside the pressure regulating chamber 1 is restored to the atmospheric pressure value, as shown in fig. 4. The electrically operated valve 4 is then rapidly closed for a closing time of 10s and remains closed. The water level of the pressure regulating chamber continuously drops, the air pressure at the top of the pressure regulating chamber is smaller and smaller, the low-pressure air can block the drop of the water level of the pressure regulating chamber, and then when the water level of the pressure regulating chamber drops to the lowest point, the air pressure at the top of the pressure regulating chamber also reaches the minimum. The smaller the pressure monitored by the pressure sensor 3 in the process, the slower the pressure deceleration until it reaches zero, and the larger the pressure. In the process, when the air pressure inside the pressure regulating chamber is smaller than the atmospheric pressure of 10mWC, the safety valve 6 is opened to ensure that the air pressure inside the pressure regulating chamber is not lower than the atmospheric pressure of 10mWC all the time. When the pressure measured by the pressure sensor 3 starts to rise, the third step is entered.
And thirdly, the control system 5 sends a valve opening signal to the electric valve 4, the electric valve 4 is quickly opened for 10s and is kept in an opening state for 30s, and external gas is introduced into the pressure regulating chamber through the valve, so that the internal pressure of the pressure regulating chamber is restored to the atmospheric pressure value. The electrically operated valve 4 is then rapidly closed for a closing time of 10s and remains closed. The water level of the pressure regulating chamber rises and enters the fourth step.
And fourthly, repeating the second step and the third step until the water level variation amplitude of the highest point and the lowest point of the water level of the pressure regulating chamber is less than 2m, ending the regulating mode, and enabling the pressure regulating device to enter a non-regulating mode.
The water level of the surge chamber can be increased by a formula H after the pressure regulating device is installed(1，max)+10＝H(2，max)+10Z(2，0)/(Z(2，0)-H(2，max)) Calculated, wherein: h(2，max)The water level of the pressure regulating chamber rises after the pressure regulating device is installed; h(1，max)The water level of the pressure regulating chamber rises without the pressure regulating device, and can be calculated by a theoretical formula in the pressure regulating chamber specification; z(2，0)The air height of the pressure adjusting chamber in the initial state is determined by design. The specific derivation process is as follows:
if no pressure regulating device is provided, the water level of the pressure regulating chamber rises H(1，max)Top gas pressure P of surge chamber(1，max)(ii) a Pressure-regulating water level rise H with pressure-regulating device(2，max)Top air pressure P of surge chamber when water level is highest(2，max). Then H can be roughly considered(1，max)+P(1，max)/ρg＝H(2，max)+P(2，max)[ rho ] g (formula 1).
For a pressure regulating chamber with a pressure regulating device, according to the krebs equation PV ═ nRT (where P is pressure, V is gas volume, n is number of moles of gas, R is constant, and T is temperature), the time period of change of the water level of the pressure regulating chamber is long, about several hundred seconds, and it can be considered that this process nRT remains unchanged, so that the water level rises from the initial state to the highest state, P is the highest state, and P is the temperature(2，0)V(2，0)＝P(2，max)V(2，max)In the formula: p(2，0)Is the pressure of the top air of the surge chamber in the initial state, V(2，0)Is the gas volume at the top of the surge chamber in the initial state, V(2，max)Is the volume of gas at the top of the surge chamber when the water level is highest. Since the cross-sectional dimension of the pressure regulating chamber remains constant with height, P(2，0)Z(2，0)＝P(2，max)Z(2，max)In the formula: z(2，0)Is the air height, Z, of the surge chamber in the initial state(2，max)Is the air height at the top of the pressure regulating chamber when the water level is highest. And because of Z(2，max)＝Z(2，0)-H(2，max)So that P can be obtained(2，0)Z(2，0)＝P(2，max)(Z(2，0)-H(2，max)) (formula 2).
By the simultaneous representation of formula 1 and formula 2, elimination of P(2，max)The following can be obtained: h(1，max)+P(1，max)/ρg＝H(2，max)+P(2，0)Z(2，0)/(Z(2，0)-H(2，max)) P ρ g, and since the atmospheric pressure is usually assumed to be 10m water column pressure (10mWC) in engineering, P(1，max)/ρg＝P(2，0)/[ rho ] g is 10m, so H(1，max)+10＝H(2，max)+10Z(2，0)/(Z(2，0)-H(2，max))。
A diversion system of a certain diversion type power station adopts a 'two-machine one-chamber one-hole' arrangement mode, the top elevation of a pressure regulating chamber is 810m, the hydraulic transition process is calculated, when the unit of the power station generates load shedding, the water level change process line in the pressure regulating chamber without the device is compared, and the specific calculation result is shown in figure 5. It can be seen that the initial water level of the pressure regulating chamber is 782.5m, the highest water level reaches 802.1m without the device, the rising amplitude of the highest water level is 19.6m, when the device is installed, the highest water level reaches 794.0m, the rising amplitude of the highest water level is 11.4m, and the highest water level of the pressure regulating chamber is obviously reduced.
And through H(1，max)+10＝H(2，max)+10Z(2，0)/(Z(2，0)-H(2，max)) The formula calculates that the highest water level of the pressure regulating chamber after the device is installed is 792.2m, and the error of the numerical calculation is 1.8 m. The reason is because in the process of formula derivation, H is assumed(1，max)+P(1，max)/ρg＝H(2，max)+P(2，max)Rhog, when the pressure regulating chamber reaches the highest point after the device is actually installed, the gravity center of the water body is lowered compared with that before the device is installed, so that the water flow can continuously flow into the pressure regulating chamber, namely H actually(1，max)+P(1，max)The/[ rho ] g is slightly smaller than H(2，max)+P(2，max)And/[ rho ] g. This formula enables a preliminary estimation of the surge chamber water level, despite some errors.
The above results show that: the pressure regulating device for improving the operation flexibility of the hydropower station and the operation method thereof can obviously reduce the highest water level of the pressure regulating chamber in the load shedding process of the unit and accelerate the water level fluctuation attenuation of the pressure regulating chamber under the condition of not increasing the stable section of the pressure regulating chamber.
The pressure regulating device for increasing the operational flexibility of a hydroelectric power station according to the present invention can be easily manufactured or used by those skilled in the art according to the description of the present invention and the attached drawings, and can produce the positive effects described in the present invention.
Unless otherwise specified, in the present invention, if there is an orientation or positional relationship indicated by terms of "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.
Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass, for example, being fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (4)
1. An operation method of a pressure regulating device for improving operation flexibility of a hydropower station is characterized in that: the pressure regulating device includes:
a pressure regulating chamber (1);
the vent hole (2) is arranged at the top of the pressure regulating chamber (1) and is used for communicating the pressure regulating chamber (1) with the outside;
the electric valve (4) is arranged inside the vent hole (2), and a safety valve (6) is arranged on the electric valve (4);
the pressure sensor (3) is arranged at the bottom of the pressure regulating chamber (1) and is used for monitoring the water pressure in the pressure regulating chamber (1);
the control system (5) is arranged inside the vent hole (2) and is respectively connected with the electric valve (4) and the pressure sensor (3) through cables;
the pressure regulating device has two operation modes, wherein the first mode is a non-regulation mode, and the second mode is a regulation mode; when the electric valve runs stably, the control system (5) is in an unregulated mode, and the electric valve (4) is always kept in an open state; when the water level of the pressure regulating chamber (1) continuously rises or falls within 30s and exceeds 2m, the control system (5) enters a regulating mode;
the specific steps of the regulation mode are as follows:
firstly, rapidly closing an electric valve (4);
secondly, when the water level of the pressure regulating chamber (1) rises to the highest point, the electric valve (4) is quickly opened and kept for a period of time, and then is quickly closed;
thirdly, when the water level of the pressure regulating chamber (1) is lowered to the lowest point, the electric valve (4) is quickly opened and kept for a period of time, and then is quickly closed;
fourthly, repeating the second step and the third step until the water level variation amplitude of the highest point and the lowest point in the water level fluctuation period of the pressure regulating chamber (1) is less than 2m, ending the regulation mode, and enabling the pressure regulating device to enter a non-regulation mode;
when the unit gets rid of the load, rivers in the diversion tunnel gush into the surge-chamber, and the surge-chamber water level rises fast, and pressure that pressure sensor surveyed can rise fast in the short time, and control system gets into the mode of regulation.
2. The method of operating a pressure regulating device for increasing flexibility of operation of a hydroelectric power plant of claim 1, comprising: the time for rapidly closing and rapidly opening the electric valve (4) is 10s, and the holding time is 30 s.
3. The method of operating a pressure regulating device for increasing flexibility of operation of a hydroelectric power plant of claim 1, comprising: the opening pressure of the safety valve (6) is set to be 10mWC, and when the air pressure inside the pressure adjusting chamber (1) is less than the atmospheric pressure of 10mWC, the safety valve (6) is opened.
4. The method of operating a pressure regulating device for increasing flexibility of operation of a hydroelectric power plant of claim 1, comprising: the pressure regulating device reduces the highest surge water level in the pressure regulating chamber (1), and can be calculated by the following formula:
H(1，max)+10＝H(2，max)+10Z(2，0)/(Z(2，0)-H(2，max))
wherein H(1，max)When no device is present, the water level in the surge chamber rises, H(2，max)For pressure-regulating water level rising with devices, Z(2，0)The air height of the pressure adjusting chamber (1) is adjusted in an initial state.
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| CN202010617166.3A CN111778916B (en) | 2020-06-30 | 2020-06-30 | Pressure regulating device for improving operation flexibility of hydropower station and operation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242266Y (en) * | 1995-10-06 | 1996-12-11 | 曾祥炜 | Shuttle like pressure-adjusting apparatus for pressure pipe-line of water power plant |
| JP2002167740A (en) * | 2000-11-29 | 2002-06-11 | Nagai Kosho:Kk | Hydraulic power generating method |
| CN2921102Y (en) * | 2006-07-14 | 2007-07-11 | 中国水电顾问集团成都勘测设计研究院 | Air cushion type pressure-regulating room pressure-equalizing system |
| CN105332363A (en) * | 2015-11-23 | 2016-02-17 | 重庆交通大学 | Pressure-adjustable core bag type air cushion surge chamber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0673719A (en) * | 1992-08-27 | 1994-03-15 | Yuichiro Tsurumaki | Method for setting capacity of closed type air cushion surge chamber |
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2020
- 2020-06-30 CN CN202010617166.3A patent/CN111778916B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2242266Y (en) * | 1995-10-06 | 1996-12-11 | 曾祥炜 | Shuttle like pressure-adjusting apparatus for pressure pipe-line of water power plant |
| JP2002167740A (en) * | 2000-11-29 | 2002-06-11 | Nagai Kosho:Kk | Hydraulic power generating method |
| CN2921102Y (en) * | 2006-07-14 | 2007-07-11 | 中国水电顾问集团成都勘测设计研究院 | Air cushion type pressure-regulating room pressure-equalizing system |
| CN105332363A (en) * | 2015-11-23 | 2016-02-17 | 重庆交通大学 | Pressure-adjustable core bag type air cushion surge chamber |
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