CN-122016110-A - Method and apparatus for determining efficiency of a water pump turbine based on operational data

CN122016110ACN 122016110 ACN122016110 ACN 122016110ACN-122016110-A

Abstract

The application provides a method and equipment for determining the efficiency of a water pump and a water turbine based on operation data, wherein a plurality of groups of operation data of a pumped storage unit are firstly obtained, target operation data are determined from the plurality of groups of operation data, then an operation parameter range is determined based on the target operation data, and finally the target water pump efficiency and/or the target water turbine efficiency are determined based on the target operation data and the operation parameter range.

Inventors

TANG YONGJUN
SONG XUGUO
QIN JUN
LIU ZHE
ZHANG ZIMO

Assignees

国网新源控股有限公司
国网新源控股有限公司检修分公司

Dates

Publication Date: 20260512
Application Date: 20251209

Claims (10)

1. A method of determining pump turbine efficiency based on operational data, comprising: Acquiring multiple groups of operation data of the pumped storage unit, and determining target operation data from the multiple groups of operation data; determining an operating parameter range based on the target operating data; And determining target water pump efficiency and/or target water turbine efficiency based on the target operation data and the operation parameter range.
2. The method of claim 1, wherein the plurality of sets of operating data comprises a plurality of sets of power generation operating data under power generation conditions and/or a plurality of sets of water pumping operating data under water pumping conditions; The determining the target operation data from the plurality of sets of operation data includes: Determining the generator output and the generator temperature in each group of the power generation operation data, and determining at least two groups of power generation operation data with the same generator output and the same generator temperature as target power generation operation data; And/or determining motor inflow force and motor temperature amount in each set of pumping operation data, and determining at least two sets of pumping operation data with the same motor inflow force and the same motor temperature amount as target pumping operation data.
3. The method of claim 1, wherein the operating parameter ranges include a generator efficiency range, a turbine efficiency range, a pump-through flow range, a power generation-through flow range, a pump-through head loss coefficient range, a power generation-through head loss coefficient range, a water pump efficiency range, and/or a motor efficiency range; The determining an operating parameter range based on the target operating data, determining a target water pump efficiency and/or a target water turbine efficiency based on the target operating data and the operating parameter range, comprising: Determining a target water turbine efficiency based on the target power generation operation data, the generator efficiency range, the water turbine efficiency range, the power generation working condition turbine flow range and the power generation working condition head loss coefficient range; And/or determining a water pump efficiency range, a motor efficiency range, a pumping working condition flow range and a pumping working condition head loss coefficient range based on the target pumping operation data, and determining target water pump efficiency based on the target pumping operation data, the water pump efficiency range, the motor efficiency range, the pumping working condition flow range and the pumping working condition head loss coefficient range.
4. The method of claim 3, wherein said determining a target turbine efficiency based on said target power generation operational data, a generator efficiency range, a turbine efficiency range, a power generation condition turbine flow range, and a power generation condition head loss coefficient range comprises: determining a plurality of sub-generator efficiencies based on the generator efficiency range and a preset generator efficiency step size; Determining the efficiency of a plurality of sub-turbines based on the turbine efficiency range and a preset turbine efficiency step length; Determining the flow of the power-generating working condition passing machine based on the power-generating working condition passing machine flow range and the preset power-generating working condition passing machine flow step length; Determining a plurality of sub-power generation working condition head loss coefficients based on the power generation working condition head loss coefficient range and a preset power generation working condition head loss coefficient step length; And determining the target water turbine efficiency based on the target power generation operation data, the plurality of sub-generator efficiencies, the plurality of sub-water turbine efficiencies, the plurality of sub-power generation working condition passing flow rates and the plurality of sub-power generation working condition head loss coefficients.
5. The method of claim 4, wherein the target power generation operating data comprises first data and second data; The determining the target water turbine efficiency based on the target power generation operation data, the plurality of sub-generator efficiencies, the plurality of sub-water turbine efficiencies, the plurality of sub-power generation working condition turbine flow rates and the plurality of sub-power generation working condition head loss coefficients comprises the following steps: determining a plurality of groups of first solutions conforming to a first water turbine efficiency determination formula based on the first data, the plurality of sub-generator efficiencies, the plurality of sub-water turbine efficiencies, the plurality of sub-power generation working condition turbine flow rates and the plurality of sub-power generation working condition head loss coefficients; Determining a plurality of groups of second solutions conforming to a second water turbine efficiency determination formula based on the second data, the plurality of sub-generator efficiencies, the plurality of sub-water turbine efficiencies, the plurality of sub-power generation condition turbine flow rates and the plurality of sub-power generation condition head loss coefficients; and determining the target water turbine efficiency based on the plurality of first solutions and the plurality of second solutions.
6. The method of claim 5, wherein each set of the first solutions includes a first generator efficiency, a first turbine efficiency, a first generator flow rate, and a first generator operating head loss coefficient, and each set of the second solutions includes a second generator efficiency, a second turbine efficiency, a second generator flow rate, and a second generator operating head loss coefficient; The determining the target turbine efficiency based on the plurality of sets of first solutions and the plurality of sets of second solutions includes: And determining the first water turbine efficiency in the first solution as the target water turbine efficiency corresponding to the first data and the second water turbine efficiency in the second solution as the target water turbine efficiency corresponding to the second data in response to the absolute value of the difference between the first power generation condition head loss coefficient in the first solution and the second power generation condition head loss coefficient in the second solution being less than or equal to the preset head loss coefficient difference and the absolute value of the difference between the first power generation efficiency in the first solution and the second power generation efficiency in the second solution being less than or equal to the preset power generation efficiency difference.
7. The method of claim 3, wherein the determining the target water pump efficiency based on the target water pump operation data, a water pump efficiency range, a motor efficiency range, a water pump condition over-drive flow range, and a water pump condition head loss coefficient range comprises: Determining a plurality of sub-motor efficiencies based on the motor efficiency range and a preset motor efficiency step size; determining a plurality of sub-water pump efficiencies based on the water pump efficiency range and a preset water pump efficiency step length; Determining a plurality of sub-pumping working condition passing flow ranges based on the pumping working condition passing flow range and the preset pumping working condition passing flow range step length; determining a plurality of sub-pumping working condition head loss coefficients based on the pumping working condition head loss coefficient range and a preset pumping working condition head loss coefficient step length; and determining the target water pump efficiency based on the target water pumping operation data, the plurality of sub motor efficiencies, the plurality of sub water pump efficiencies, the plurality of sub water pumping working condition over-machine flow ranges and the plurality of sub water pumping working condition head loss coefficients.
8. The method of claim 7, wherein the target pump operation data comprises third data and fourth data; The determining the target water pump efficiency based on the target water pumping operation data, the plurality of sub motor efficiencies, the plurality of sub water pump efficiencies, the plurality of sub water pumping working condition over-pump flow ranges and the plurality of sub water pumping working condition head loss coefficients comprises the following steps: determining a plurality of groups of third solutions conforming to a first water pump efficiency formula based on the third data, the plurality of sub-motor efficiencies, the plurality of sub-water pump efficiencies, the plurality of sub-pumping condition over-machine flow ranges and the plurality of sub-pumping condition head loss coefficients; Determining a plurality of groups of fourth solutions conforming to a second water pump efficiency formula based on the fourth data, the plurality of sub-motor efficiencies, the plurality of sub-water pump efficiencies, the plurality of sub-pumping condition over-machine flow ranges and the plurality of sub-pumping condition head loss coefficients; and determining the target water pump efficiency based on the plurality of sets of third solutions and the plurality of sets of fourth solutions.
9. The method of claim 8, wherein each set of the third solutions includes a first motor efficiency, a first pump-through flow range, and a first pump-through head loss coefficient; each group of the fourth solutions comprises second motor efficiency, second water pump efficiency, a second pumping working condition through-machine flow range and a second pumping working condition head loss coefficient; the determining the target water pump efficiency based on the plurality of sets of third solutions and the plurality of sets of fourth solutions includes: And determining the first water pump efficiency in the third solution as the target water pump efficiency corresponding to the third data and the second water turbine efficiency in the fourth solution as the target water pump efficiency corresponding to the fourth data in response to the absolute value of the difference between the first pumping condition head loss coefficient in the third solution and the second pumping condition head loss coefficient in the fourth solution being less than or equal to the preset head loss coefficient difference and the absolute value of the difference between the first motor efficiency in the third solution and the second motor efficiency in the fourth solution being less than or equal to the preset motor efficiency difference.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, characterized in that the processor implements the method according to any one of claims 1 to 9 when executing the computer program.

Description

Method and apparatus for determining efficiency of a water pump turbine based on operational data Technical Field The application relates to the technical field of pumped storage units, in particular to a method and equipment for determining efficiency of a water pump turbine based on operation data. Background The pumped storage is used as a regulating power supply and an energy storage power supply which are mature in technology, reliable in operation and economical, and is an important component for constructing a novel power system taking new energy as a main body. A newly built power station usually needs to select a unit to develop an energy performance test of the efficiency of the water pump and the water turbine within 1-2 years, so as to check whether the unit meets the requirements of a host contract. The existing water pump turbine efficiency testing method has the problems of long test preparation work time, strong environment dependence, harsh test conditions and insufficient monitoring precision. Disclosure of Invention In view of the above, the present application aims to provide a method and apparatus for determining efficiency of a water pump turbine based on operation data, so as to solve the problem of insufficient efficiency testing accuracy of the water pump turbine. Based on the above object, a first aspect of the present application provides a method for determining efficiency of a water pump turbine based on operation data, comprising: Acquiring multiple groups of operation data of the pumped storage unit, and determining target operation data from the multiple groups of operation data; determining an operating parameter range based on the target operating data; And determining target water pump efficiency and/or target water turbine efficiency based on the target operation data and the operation parameter range. Based on the same inventive concept, a second aspect of the present application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and running on the processor, the processor implementing the method according to any of the above first aspects when executing the computer program. From the above, it can be seen that the method and apparatus for determining efficiency of a water pump and a water turbine based on operation data provided by the present application firstly obtains a plurality of sets of operation data of a pumped storage unit, and determines target operation data from the plurality of sets of operation data, then determines an operation parameter range based on the target operation data, and finally determines target water pump efficiency and/or target water turbine efficiency based on the target operation data and the operation parameter range, the whole process of determining target water pump efficiency and/or target water turbine efficiency depends only on the obtained plurality of sets of operation data of the pumped storage unit, the running data are data generated when the unit normally runs, that is, the target water pump efficiency and/or the target water turbine efficiency can be determined only based on the data generated when the unit normally runs, the whole determination process does not need to stop to arrange the sensor and dismantle the sensor after the test is finished, the special test time does not need to be arranged, any adverse effect on the unit is avoided, the water turbine efficiency and/or the water pump efficiency can be determined only by using the existing test point data, and the convenience and applicability of the determination method are improved. Drawings In order to more clearly illustrate the technical solutions of the present application or related art, the drawings that are required to be used in the description of the embodiments or related art will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort to those of ordinary skill in the art. FIG. 1 is a schematic view of an ultrasonic flow meter arranged in the related art; FIG. 2 is a schematic diagram of an arrangement of a thermodynamic method employing direct measurement of efficiency in the related art; FIG. 3 is a flow chart of a method for determining pump turbine efficiency based on operational data according to an embodiment of the present application; FIG. 4 is a schematic diagram of an apparatus for determining pump turbine efficiency based on operational data according to an embodiment of the present application; Fig. 5 is a schematic diagram of an electronic device according to an embodiment of the application. Detailed Description The present application will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and