CN215064651U - Hydropower station unit performance test calculating device - Google Patents
Hydropower station unit performance test calculating device Download PDFInfo
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- CN215064651U CN215064651U CN202121265704.3U CN202121265704U CN215064651U CN 215064651 U CN215064651 U CN 215064651U CN 202121265704 U CN202121265704 U CN 202121265704U CN 215064651 U CN215064651 U CN 215064651U
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Abstract
The utility model discloses a power station unit performance test calculating device, including first measuring module and stator water leakage calculation module, this stator water leakage calculation module calculates stator water leakage Q2 according to the data of this first measuring module feedback, still include second measuring module and unit efficiency calculation module, this second measuring module is used for measuring the motor output value P of this unit, hydraulic turbine flow value Q1 and hydraulic turbine head value H, this unit efficiency calculation module acquires this motor output value P of this second measuring module feedback, this hydraulic turbine flow value Q1 and this hydraulic turbine head value H, this unit efficiency calculation module is according to this motor output value P, this hydraulic turbine flow value Q1 and this hydraulic turbine head value H confirm this unit efficiency eta. The utility model discloses can accomplish a plurality of unit performance data's measurement calculation in step, have the characteristics of multipotency, can improve test efficiency, reduce equipment cost.
Description
Technical Field
The utility model relates to a hydroelectric power generation field test technical field particularly, relates to a power station unit performance test computing device.
Background
At present, the performance test mode of large and medium hydropower stations is complex, a special instrument and a meter are required to be connected for field test, operation data are manually read, a unit performance test value is obtained through comparison or formula calculation and is analyzed, a conclusion is obtained, a test report is issued, and a large amount of manpower and material resources are consumed in the process.
The prior published Chinese utility model patent with the patent name of 'a method and a device for measuring the water leakage of a rated guide vane of a water turbine', and the publication number CN107131917B, specifically discloses a device for measuring the water leakage of the rated guide vane of the water turbine, which comprises a first determining unit and a second determining unit, wherein the first determining unit is used for determining a reference pressure head based on the pressure difference value between the water pressure in a water inlet pipeline of the water turbine and the water pressure in a tail water pipeline when a hydraulic turbine flat pressure facility is closed; and the second determination unit is used for determining the water leakage amount of the rated guide vane of the water turbine based on the reference pressure water head and the horizontal section area of the inclined shaft section of the water inlet pipeline of the water turbine or the area of the vent hole of the water turbine.
However, the measuring device disclosed in the above patent has a single function, and is difficult to realize multi-functionalization, and in the test measurement, different performance data of different units can be measured only by adopting a plurality of sets of equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power station unit performance test computing device, it designs to power station unit performance test, can accomplish a plurality of unit performance data's measurement calculation in step, has the characteristics of multipotency, can improve test efficiency, reduction equipment cost.
The embodiment of the utility model discloses a realize through following technical scheme:
the utility model provides a power station unit performance test calculating device, including first measuring module and stator water leakage calculation module, this stator water leakage calculation module is according to the data calculation stator water leakage Q2 that this first measuring module feedbacks, still include second measuring module and unit efficiency calculation module, this second measuring module is used for measuring the motor output value P of this unit, hydraulic turbine flow value Q1 and hydraulic turbine head value H, this unit efficiency calculation module obtains this motor output value P, this hydraulic turbine flow value Q1 and this hydraulic turbine head value H that this second measuring module feedbacks, this unit efficiency calculation module confirms this unit efficiency eta according to this motor output value P, this hydraulic turbine flow value Q1 and this hydraulic turbine head value H.
The utility model discloses an in an embodiment, still include third measuring module and unit temperature rise computing module, this unit is located to this third measuring module, and this third measuring module is used for measuring the temperature of this unit, and this unit temperature rise computing module is used for acquireing the data of this third measuring module feedback, and the temperature rise of this unit is confirmed according to the data of this third measuring module feedback to this unit temperature rise computing module.
In an embodiment of the invention, the second measurement module is provided with a flow meter and a head pressure sensor.
In an embodiment of the present invention, the unit efficiency calculation module determines the unit efficiency η according to the following formula:
where ρ is the density of water and g is the local gravitational acceleration of the hydropower station.
In an embodiment of the present invention, the third measuring module is configured with a plurality of temperature sensors, and the plurality of temperature sensors are used for measuring the temperature of the stator winding, the stator core, the cooling medium and the guide bearing in the unit.
In an embodiment of the present invention, the first measuring module is configured with a timing device, a first pressure sensor and a second pressure sensor, two sections of the vertical pipe section at the water inlet end of the water turbine are respectively an S1 section and an S2 section, the volute inlet water pressure at the S1 section is p1, the volute inlet water pressure at the S2 section is p2, the p1 is greater than the p2, and the timing device is configured to measure the time that the volute inlet water pressure falls from p1 to p 2.
In an embodiment of the present invention, the guide vane water leakage calculation module determines the guide vane water leakage Q2 according to the following formula:
wherein d is the diameter of the straight pipe, and T is guide vane water leakage statistical time.
The utility model discloses technical scheme has following advantage and beneficial effect at least:
the embodiment of the utility model provides a through setting up the computing device who includes second measuring module and unit efficiency calculation module, on utilizing first measuring module and stator water leakage calculation module to realize the measuring basis of unit stator flow rate, utilize second measuring module and unit efficiency calculation module to realize the measurement of unit efficiency for computing device can accomplish a plurality of unit performance data's measurement calculation in step, and it has the characteristics of multipotency, has improved experimental efficiency, has reduced equipment cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is the utility model discloses in embodiment hydropower station unit performance test computing device's functional block diagram.
Icon: 1-a first measuring module, 2-a guide vane water leakage calculating module, 3-a second measuring module, 4-a unit efficiency calculating module, 5-a third measuring module and 6-a unit temperature rise calculating module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be interpreted as a limitation of the present invention.
In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "configured," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, a hydropower station unit performance test calculation device includes a first measurement module 1 and a guide vane water leakage calculation module 2, where the guide vane water leakage calculation module 2 calculates a guide vane water leakage Q2 according to data fed back by the first measurement module 1, and in this embodiment, the first measurement module 1 and the guide vane water leakage calculation module 2 are used to realize automatic measurement of the guide vane water leakage of a hydropower station hydraulic turbine unit. Specifically, the first measuring module 1 is configured with a timing device, a first pressure sensor and a second pressure sensor, the first measuring module 1 may be a separately provided measuring module, and the first measuring module 1 may also be a sensor already existing in an in-situ control unit in the hydropower station. Setting two sections of a vertical-shaft straight pipe section at the water inlet end of the unit as an S1 section and an S2 section respectively, wherein the volute inlet water pressure at the S1 section is p1, the volute inlet water pressure at the S2 section is p2, the p1 is larger than the p2, the timing device is used for measuring the time for reducing the volute inlet water pressure from p1 to p2, and the guide vane water leakage calculation module 2 determines the guide vane water leakage according to the following formula:
wherein Q2 is guide vane water leakage quantity, unit m3S; d is the diameter of the straight pipe, unit m3(ii) a T is guide vane water leakage statistical time in unit s; p is a radical of1 and p2 are in Pa.
In the implementation of the embodiment, the computing device is networked with the local control unit, and acquires the data of p1 and p2 from the local control unit. During the guide vane water leakage test, under the conditions that a unit quick gate and a movable guide vane are completely closed and tail water in a tail water pipe is discharged outside, a pressure steel pipe straight pipe section is selected for analysis and calculation, the section of pressure p1 of the straight pipe section is selected as a measurement S1 section, the section of pressure p2 is selected as a measurement S2 section, and after the coordination test is started, recording is started when the pressure of a volute is reduced to be lower than p 1. And calculating the water leakage amount of the guide vane by the difference of statistical time with the corresponding pressure p 1-p 2 of the elevations of the sections S1 and S2 of the vertical pipe section.
In order to realize the automatic calculation of the efficiency of the hydraulic turbine set in the hydropower station, the calculating device further comprises a second measuring module 3 and a set efficiency calculating module 4, wherein the second measuring module 3 is used for measuring a motor output value P, a hydraulic turbine flow value Q1 and a hydraulic turbine head value H of the set, specifically, the second measuring module 3 is configured with a flow meter and a head pressure sensor, of course, the second measuring module 3 can be a separately arranged measuring module, and the second measuring module 3 can also be an existing sensor in an in-situ control unit in the hydropower station. In the implementation of the embodiment, the computing device is networked with the local control unit, and acquires data of the motor output value P, the water turbine flow value Q1 and the water turbine head value H from the local control unit. The unit efficiency calculation module 4 obtains the motor output value P, the turbine flow value Q1 and the turbine head value H fed back by the second measurement module 3, and the unit efficiency calculation module 4 determines the unit efficiency η according to the motor output value P, the turbine flow value Q1 and the turbine head value H. The unit efficiency calculation module 4 determines the unit efficiency η according to the following formula:
wherein, P is motor output and the unit is MW; ρ is the density of water in units of (kg/m)3)，ρ＝999.7kg/m3(ii) a g is the local gravitational acceleration of the hydropower station and has the unit of(m/s2) G is 9.783; q1 is the flow value of the water turbine in m3S; h is the water turbine head value and is in m.
In order to realize the measurement of the temperature rise of the water turbine unit, the calculating device further comprises a third measuring module 5 and a unit temperature rise calculating module 6, the third measuring module 5 is arranged on the unit, the third measuring module 5 is used for measuring the temperature of the unit, the third measuring module 5 is provided with a plurality of temperature sensors, and the temperature sensors are used for measuring the temperature of a stator winding, a stator core, a cooling medium and a guide bearing in the unit. The third measuring module 5 may be a separately provided measuring module, and the third measuring module 5 may also be a sensor already present in an in-situ control unit in the hydroelectric power station. The unit temperature rise calculation module 6 is configured to obtain data fed back by the third measurement module 5, and the unit temperature rise calculation module 6 determines the temperature rise of the unit according to the data fed back by the third measurement module 5. During the temperature rise test, the recording was carried out every 30 minutes. When the temperature of each part of the generator gradually becomes stable, the data of each point is recorded for 1 time every 15 minutes. When the temperature change of each part of the generator does not exceed 2K in the last 1 hour, the generator is considered to generate heat to reach a stable state, and the average value of the temperatures of several time intervals in the stable stage is taken as the temperature of the generator under the load.
Compared with the prior art, the embodiment of the utility model provides a through setting up the computing device who includes second measuring module 3 and unit efficiency calculation module 4, on utilizing first measuring module 1 and stator water leakage calculation module 2 to realize the measuring basis of unit stator flowing water rate, utilize second measuring module 3 and unit efficiency calculation module 4 to realize the measurement of unit efficiency, make computing device can accomplish the measurement of a plurality of unit performance data in step and calculate, it has the characteristics of multipotency, the efficiency of the test is improved, the equipment cost is reduced.
Compared with the prior art, the technical scheme has the advantages that data information such as the upstream and downstream water levels of the power station unit, the stator winding, the stator iron core, the cooling medium, the temperature of each guide bearing, the output of the motor, the flow rate of the cooling medium, the corresponding water head, the inlet pressure of the volute and the like is acquired, and after the data information is automatically calculated by the test platform, real-time unit temperature rise, efficiency values and guide vane water leakage are provided for field technicians, so that the complex process of manually acquiring data and then calculating under the prior art is solved, the data acquisition is synchronous, the actual workload is greatly saved, and the error rate is reduced. Through the test platform, the data collected before and after the unit is overhauled and the numerical information automatically calculated can be automatically stored on the platform timely and effectively, and the data can be conveniently taken and consulted at any time.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A hydropower station unit performance test calculating device comprises a first measuring module and a guide vane water leakage amount calculating module, wherein the guide vane water leakage amount calculating module calculates guide vane water leakage amount Q2 according to data fed back by the first measuring module,
also comprises a second measuring module and a unit efficiency calculating module,
the second measuring module is used for measuring a motor output value P, a water turbine flow value Q1 and a water turbine head value H of the unit,
the unit efficiency calculation module obtains the motor output value P, the water turbine flow value Q1 and the water turbine head value H fed back by the second measurement module, and determines the unit efficiency eta according to the motor output value P, the water turbine flow value Q1 and the water turbine head value H.
2. The hydropower station unit performance test calculation device according to claim 1,
also comprises a third measuring module and a unit temperature rise calculating module,
the third measuring module is arranged on the unit and used for measuring the temperature of the unit,
the unit temperature rise calculation module is used for acquiring data fed back by the third measurement module, and the unit temperature rise calculation module determines the temperature rise of the unit according to the data fed back by the third measurement module.
3. The hydropower station unit performance test calculation device according to claim 1,
the second measurement module is configured with a flow meter and a head pressure sensor.
4. The hydropower station unit performance test calculation device according to claim 1,
the unit efficiency calculation module determines the unit efficiency eta according to the following formula:
where ρ is the density of water and g is the local gravitational acceleration of the hydropower station.
5. The hydropower station unit performance test calculation device according to claim 2,
the third measuring module is provided with a plurality of temperature sensors, and the temperature sensors are used for measuring the temperature of the stator winding, the stator core, the cooling medium and the guide bearing in the unit.
6. The hydropower station unit performance test calculation device according to claim 1,
the first measurement module is provided with a timing device, a first pressure sensor and a second pressure sensor,
two sections of the vertical shaft straight pipe section at the water inlet end of the unit are respectively an S1 section and an S2 section,
the volute inlet water pressure at the section S1 is p1, the volute inlet water pressure at the section S2 is p2, the p1 is greater than the p2,
the timing device is used to measure the time for the volute inlet water pressure to drop from p1 to p 2.
7. The hydropower station unit performance test calculation device according to claim 6,
the guide vane water leakage calculation module determines the guide vane water leakage Q2 according to the following formula:
wherein d is the diameter of the straight pipe, and T is guide vane water leakage statistical time.
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