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Analysis method for pumped storage generator damper winding magnetic field characteristics

A technology of damping windings and pumped storage, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not being able to accurately analyze the magnetic field of pumped storage generators and the effective method of damping windings, etc., to achieve calculation The results are accurate and fast, suitable for parallel computing, and the program realizes simple effects

Inactive Publication Date: 2017-09-15
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for analyzing the magnetic field characteristics of the damping winding of a pumped storage generator to solve the problem that there is no effective method for accurately analyzing the specific relationship between the magnetic field of a pumped storage generator and the damping winding

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  • Analysis method for pumped storage generator damper winding magnetic field characteristics
  • Analysis method for pumped storage generator damper winding magnetic field characteristics
  • Analysis method for pumped storage generator damper winding magnetic field characteristics

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Embodiment Construction

[0034] Preferred embodiments of the present invention are described in detail below.

[0035] A method for analyzing the magnetic field characteristics of a pumped storage generator damping winding according to the present invention comprises the following steps:

[0036] Step 1: Establish a mathematical model and a finite element model and complete the simulation.

[0037] Step 2, simplify the physical model:

[0038] The following simplifications are adopted: ①ignore the stator cogging effect, and consider that the magnetic field lines enter the stator magnetic circuit vertically; ②consider that the lengths of the rotor and the stator after being expanded along the circumference are equal, that is, the original sector-shaped solution domain is simplified to a rectangle; ③ignoring the permeability of ferromagnetic materials The non-linearity and the change with temperature are considered constant; ④ Ignore the cogging effect of the rotor except the large tooth; ⑤ Ignore the ...

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Abstract

The invention discloses an analysis method for pumped storage generator damper winding magnetic field characteristics, and belongs to the technical field of pumped storage generator magnetic field analysis. In order to solve the problem that an effective method capable of accurately analyzing a specific relationship between the pumped storage generator magnetic field and a damper winding does not exist at present, the method comprises the following steps that: S1: establishing a mathematical model and a finite element model, and finishing simulation; S2: simplifying a physical model; S3: determining the mathematical model; S4: calculating electromagnetic force borne by damping bars, exciting windings, pole bodies and pole shoes in different working condition conversion and transition processes; S5: coupling a domain decomposition method with a radial basis element-free method; S6: obtaining a function relationship between a loading rate and a damper winding dynamic conversion current; and S7: analyzing a result. By use of the analysis method for pumped storage generator damper winding magnetic field characteristics, dependency on elements can be gotten rid of, and the method has the advantages of high accuracy, simpleness in calculation and the like.

Description

technical field [0001] The invention relates to a method for analyzing magnetic field characteristics, in particular to a method for analyzing the magnetic field characteristics of a damping winding of a pumped storage generator, and belongs to the technical field of magnetic field analysis of a pumped storage generator. Background technique [0002] Pumped storage power station is a special type of hydropower station, and its components include upper and lower reservoirs, switch stations and water delivery channels. The pumped storage power station is composed of pumps and water turbines. When some users stop using electricity at night, and various large-scale thermal power plants and nuclear power plants cannot be shut down or reduce power generation, and there is surplus power in the power system, pumped storage The power station can use these remaining power to start the equipment to pump the water from the low place to the high place for storage, and then release the wa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 陶大军刘琢戈宝军李栋栋陈修材
Owner HARBIN UNIV OF SCI & TECH
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