CN109797723B - Method for regulating and controlling surge water level of upstream surge chamber or downstream surge chamber of power station of rapid and stable long-distance water delivery system - Google Patents
Method for regulating and controlling surge water level of upstream surge chamber or downstream surge chamber of power station of rapid and stable long-distance water delivery system Download PDFInfo
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- CN109797723B CN109797723B CN201910006471.6A CN201910006471A CN109797723B CN 109797723 B CN109797723 B CN 109797723B CN 201910006471 A CN201910006471 A CN 201910006471A CN 109797723 B CN109797723 B CN 109797723B
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Abstract
The invention provides a method for regulating and controlling the surge water level of an upstream surge chamber or a downstream surge chamber of a power station of a rapid and stable long-distance water transmission system. For the increasing load of the upstream pressure regulating chamber, the water level fluctuation in the pressure regulating chamber is counteracted in an increasing-stopping-increasing step-shaped interval load increasing mode, so that the water level fluctuation is fast and stable; for the load reduction of the upstream pressure regulating chamber, the water level fluctuation in the pressure regulating chamber is counteracted in a step-shaped interval load reduction mode of 'reduction-stop-reduction', and the water level fluctuation is rapidly and stably realized. The method is simple to operate, can quickly and stably regulate the water level fluctuation of the pressure regulating chamber, improves the operation stability of the unit, prolongs the service life of the unit, and does not increase any operation cost; the invention is generally applicable to long water delivery system power stations, including long diversion tunnels or long tailwater tunnel power stations; the invention has higher safety and reliability, and can realize automatic control and adjustment by matching with modern monitoring and intelligent control technology.
Description
Technical Field
The invention relates to a method for regulating and controlling surge water level of an upstream surge chamber or a downstream surge chamber of a power station of a rapid and stable long-distance water delivery system, which is mainly used in hydropower engineering.
Background
Long water delivery system power station (the power station of water delivery tunnel length more than 3 km), its surge-chamber all have that hydraulic power inertia is big, the characteristics of water level fluctuation cycle length, receive the restriction of power station self arrangement characteristics and objective law, there is the surge amplitude of surge-chamber big, the slow problem of fluctuation decay in general to can influence the even running of unit, still can aggravate the unit wearing and tearing in addition, shorten unit life.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, a method for regulating and controlling the surge water level of an upstream surge chamber or a downstream surge chamber of a power station of a rapid and stable long-distance water transmission system is provided.
The idea of the invention is as follows: according to the regulation rule of the hydropower station, for an upstream surge chamber, a power station unit increases load, the water level of the surge chamber fluctuates downwards, a unit reduces load, and the water level of the surge chamber fluctuates upwards; the power station unit reduces the load, the surge chamber water level can fluctuate upwards, the unit increases the load, the surge chamber water level can fluctuate downwards, and for the downstream surge chamber, the situation is opposite. Because the surge period of the surge chamber of the long water delivery system power station is long, the water level of the surge chamber can be reversely adjusted by increasing or decreasing the load of the unit in the descending or ascending process of the water level of the surge chamber according to the regulation rule of the power station, so that the original water level fluctuation of the surge chamber is offset, and the surge water level is quickly and stably realized.
The specific technical scheme of the invention is as follows:
a method for regulating and controlling surge water level of an upstream surge chamber of a rapid and stable long-distance water transmission system power station is characterized by comprising the following steps:
arranging a water level monitoring instrument in the pressure regulating chamber, monitoring and recording the water level change of the pressure regulating chamber in real time, and synchronously transmitting monitoring data to a unit control system;
if the unit is in load increase, in the load increase process of the unit, if the water level of the pressure regulating chamber is in the rising process, the unit is controlled to increase the load on the basis of the current load, when the water level fluctuation of the pressure regulating chamber is converted into the falling process, the load increase operation of the unit is suspended, when the water level fluctuation is converted into the rising process again, the load increase of the unit on the basis of the current load is continued, the water level fluctuation in the pressure regulating chamber is offset through the step-shaped interval load increase mode of increasing, stopping and increasing, and the water level fluctuation is rapid and stable; if the unit is in load reduction, in the load reduction process of the unit, if the water level of the pressure regulating chamber is in a descending process, the unit is controlled to reduce the load again on the basis of the current load, when the fluctuation of the water level of the pressure regulating chamber is converted into an ascending process, the load reduction operation of the unit is suspended, and when the fluctuation of the water level is converted into a descending process again, the load reduction of the unit on the basis of the current load is continued; the water level fluctuation in the pressure regulating chamber is offset by a step-shaped interval load reduction mode of reduction-stop-reduction, so that the water level fluctuation is fast and stable.
A method for regulating and controlling the surge water level of a downstream surge chamber of a power station of a rapid and stable long-distance water delivery system is characterized by comprising the following steps of:
arranging a water level monitoring instrument in the pressure regulating chamber, monitoring and recording the water level change of the pressure regulating chamber in real time, and synchronously transmitting monitoring data to a unit control system;
if the unit is in a load increasing process, if the water level of the pressure regulating chamber is in a descending process in the load increasing process of the unit, the unit is controlled to increase the load on the basis of the current load, when the water level fluctuation of the pressure regulating chamber is converted into an ascending process, the load increasing operation of the unit is suspended, when the water level fluctuation is converted into the descending process again, the load of the unit is continuously increased on the basis of the current load, the water level fluctuation in the pressure regulating chamber is offset in the step-shaped interval load increasing mode of increasing, stopping and increasing, and the water level fluctuation is rapidly and stably realized; if the unit is in load reduction, in the load reduction process of the unit, if the water level of the pressure regulating chamber is in the rising process, the unit is controlled to reduce the load again on the basis of the current load, when the fluctuation of the water level of the pressure regulating chamber is converted into the falling process, the load reduction operation of the unit is suspended, and when the fluctuation of the water level is converted into the rising process again, the load reduction of the unit on the basis of the current load is continued; the water level fluctuation in the pressure regulating chamber is offset by a step-shaped interval load reduction mode of reduction-stop-reduction, so that the water level fluctuation is fast and stable.
The invention has the beneficial effects that: 1. the method is simple to operate, and can quickly stabilize the water level fluctuation of the surge chamber of the hydropower station with the length of the water delivery tunnel exceeding 3km, improve the operation stability of the unit, prolong the service life of the unit and not increase any operation cost; 2. the method is generally applicable to long water delivery system power stations, including long diversion tunnels or long tailwater tunnel power stations; 3. because the surge chamber of the long-distance water delivery system power station has long fluctuation period, the adjusting method has high safety and reliability, and can realize automatic control and adjustment by matching with modern monitoring and intelligent control technology.
Drawings
Fig. 1 is a schematic diagram of a unit load-increasing operation process of an upstream pressure-regulating room power station, and a downstream pressure-regulating room or unit load-reducing operation process is the same as the principle of the operation process.
Detailed Description
As shown in FIG. 1, the upstream surge chamber corresponds to two units, the length of the diversion tunnel is 16.7km, the maximum water level peak appearing before 10 points and 42 minutes is caused by the load reduction of the first unit by 600MW, and then the load increase of the second unit by 600MW is carried out.
As shown in fig. 1, the wavy thin dashed line is a process of waiting for natural attenuation of water level fluctuation in the upstream pressure regulating chamber without using the regulation method of the present invention, and it can be seen from the figure that the fluctuation is still severe after 11 o ' clock 18 minutes, because the length of the time axis in the figure is limited, the fluctuation of the water level after 11 o ' clock 18 minutes is omitted in the figure, and actually, the fluctuation of the water level is substantially stopped until 12 o ' clock 20 minutes, which takes about 1 hour and 35 minutes.
By adopting the regulation and control method, in the process of increasing the load of the unit, if the water level of the pressure regulating chamber is in the rising process, the unit is controlled to increase the load on the basis of the current load, when the fluctuation of the water level of the pressure regulating chamber is converted into the falling process, the load increasing operation of the unit is suspended, when the fluctuation of the water level is converted into the rising process again, the load of the unit on the basis of the current load is continuously increased, and the fluctuation of the water level in the pressure regulating chamber is counteracted through the step-shaped interval load increasing mode of increasing, stopping and increasing, so that the rapid and stable fluctuation of the water level.
The dashed thick dotted line in fig. 1 shows the regulation method of the present invention. Starting to increase the load at 10 points 45, and increasing the load to 300MW at 10 points 49 in a first stage; in the second stage, the water level in the pressure regulating chamber is in the descending process from 10 points 49 to 10 points 54, and the load increase is suspended; in the third stage, the water level fluctuation is converted into a rising process again from 10 points 54 to 10 points 58, the load is increased by 300MW again, and the preset load of the unit is 600MW, namely the control process of the step-shaped interval load increasing mode of increasing-stopping-increasing is achieved. The thick solid line in fig. 1 is the water level fluctuation process of the upstream pressure regulating chamber after the regulation and control method of the present invention is adopted, and it can be seen from the water level fluctuation process that the water level is basically stable after 10 o' clock and 58 minutes, the time is only about 15 minutes, and the water level fluctuation stable time is shortened to about 16% of the original time; from the fluctuation amplitude, after 10 points and 45 minutes (namely after the regulation and control method of the invention is adopted), the fluctuation range of the water level is 1635 m-1648 m in height, the maximum amplitude is reduced to 13m from the original 43m, and the fluctuation amplitude is reduced to about 30% of the original amplitude. The method of the invention has double functions of reducing the water level fluctuation time and the water level variation amplitude.
The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the relevant art are covered by the protection scope of the present invention.
Claims (2)
1. A method for regulating and controlling surge water level of an upstream surge chamber of a rapid and stable long-distance water transmission system power station is characterized by comprising the following steps:
arranging a water level monitoring instrument in the pressure regulating chamber, monitoring and recording the water level change of the pressure regulating chamber in real time, and synchronously transmitting monitoring data to a unit control system;
if the unit is in load increase, in the load increase process of the unit, if the water level of the pressure regulating chamber is in the rising process, the unit is controlled to increase the load on the basis of the current load, when the water level fluctuation of the pressure regulating chamber is converted into the falling process, the load increase operation of the unit is suspended, when the water level fluctuation is converted into the rising process again, the load increase of the unit on the basis of the current load is continued, the water level fluctuation in the pressure regulating chamber is offset through the step-shaped interval load increase mode of increasing, stopping and increasing, and the water level fluctuation is rapid and stable; if the unit is in load reduction, in the load reduction process of the unit, if the water level of the pressure regulating chamber is in a descending process, the unit is controlled to reduce the load again on the basis of the current load, when the fluctuation of the water level of the pressure regulating chamber is converted into an ascending process, the load reduction operation of the unit is suspended, and when the fluctuation of the water level is converted into a descending process again, the load reduction of the unit on the basis of the current load is continued; the water level fluctuation in the pressure regulating chamber is counteracted in a step-shaped interval load reduction mode of 'reduction-stop-reduction', and the water level fluctuation is rapidly and stably realized.
2. A method for regulating and controlling the surge water level of a downstream surge chamber of a power station of a rapid and stable long-distance water delivery system is characterized by comprising the following steps of:
arranging a water level monitoring instrument in the pressure regulating chamber, monitoring and recording the water level change of the pressure regulating chamber in real time, and synchronously transmitting monitoring data to a unit control system;
if the unit is in a load increasing process, if the water level of the pressure regulating chamber is in a descending process in the load increasing process of the unit, the unit is controlled to increase the load on the basis of the current load, when the water level fluctuation of the pressure regulating chamber is converted into an ascending process, the load increasing operation of the unit is suspended, when the water level fluctuation is converted into the descending process again, the load of the unit is continuously increased on the basis of the current load, the water level fluctuation in the pressure regulating chamber is offset in the step-shaped interval load increasing mode of increasing, stopping and increasing, and the water level fluctuation is rapidly and stably realized; if the unit is in load reduction, in the load reduction process of the unit, if the water level of the pressure regulating chamber is in the rising process, the unit is controlled to reduce the load again on the basis of the current load, when the fluctuation of the water level of the pressure regulating chamber is converted into the falling process, the load reduction operation of the unit is suspended, and when the fluctuation of the water level is converted into the rising process again, the load reduction of the unit on the basis of the current load is continued; the water level fluctuation in the pressure regulating chamber is offset by a step-shaped interval load reduction mode of reduction-stop-reduction, so that the water level fluctuation is fast and stable.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910006471.6A CN109797723B (en) | 2019-01-04 | 2019-01-04 | Method for regulating and controlling surge water level of upstream surge chamber or downstream surge chamber of power station of rapid and stable long-distance water delivery system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910006471.6A CN109797723B (en) | 2019-01-04 | 2019-01-04 | Method for regulating and controlling surge water level of upstream surge chamber or downstream surge chamber of power station of rapid and stable long-distance water delivery system |
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| CN109797723A CN109797723A (en) | 2019-05-24 |
| CN109797723B true CN109797723B (en) | 2020-10-27 |
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| JPH0673719A (en) * | 1992-08-27 | 1994-03-15 | Yuichiro Tsurumaki | Method for setting capacity of closed type air cushion surge chamber |
| CN100462505C (en) * | 2006-12-28 | 2009-02-18 | 吴昊 | Hydroelectric station voltage regulating room structure |
| JPWO2008108234A1 (en) * | 2007-02-20 | 2010-06-10 | トヨタ自動車株式会社 | Internal combustion engine |
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