Method for calculating electromagnetism of MW-level doubly-fed wind driven generator

Abstract

The invention discloses a method for calculating electromagnetism of an MW-level doubly-fed wind driven generator. The method comprises a chart database establishment step and an electromagnetism calculation step, wherein the electromagnetism calculation step comprises the following substeps: inputting generator data; calculating main sizes of the generator and setting parameters; selecting a generator winding; calculating active power; judging whether the active power is equal to rated power, entering the next step if the active power is equal to the rated power, and otherwise, turning to the substep of calculating main sizes of the generator and setting parameters; calculating a potential coefficient; calculating exciting voltage and exciting capacitance of a rotor; calculating a performance parameter; judging whether the performance parameter is in accordance with the requirement, if the performance parameter is in accordance with the requirement, entering the next step, and otherwise, turning to the step of inputting the generator data; outputting data and a characteristic curve and storing the data and the curve into the chart database; and recording relevant information into the chart database by using a modularized program. The method has the advantages that the structure is simple and the chart database is convenient to search.

Description

technical field [0001] The invention relates to an electromagnetic calculation method for a generator, in particular to an electromagnetic calculation method for a MW-level double-fed wind power generator. Background technique [0002] The electromagnetic calculation of the motor is the core content of the motor design. It is not only related to the performance, operating stability, life, production cost, and operating cost of the motor, but also related to whether it can meet user requirements, peripheral equipment interface requirements, and process requirements. As a prerequisite for structural design, it takes a long time to determine a satisfactory electromagnetic scheme through traditional written calculations, ranging from 2 to 3 weeks to as long as one month. It also requires more manpower, and the accuracy is not high and the error is large. With the continuous emergence of new technologies and materials, traditional electromagnetic calculation methods do not take i...

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Problems solved by technology

[0002] The electromagnetic calculation of the motor is the core content of the motor design. It is not only related to the performance, operating stability, life, production cost, and operating cost of the motor, but also related to whether it can meet user requirements, peripheral equipment interface requirements, and process requirements. As a prerequisite for structural design, it takes a long time to determine a satisfactory electromagnetic scheme through traditional written calculations, ranging from 2 to 3 weeks to as long as one month. It also requires more manpower, and the accuracy is not high and the error is large. With the continuous emergence of new technologies and materials, the traditional electromagnetic calculation method does not take into account the operating characteristics and power characteristics of the wind turbine itself, and has the disadvantages of time-consuming, low work efficiency, complex structure, and low scalability.

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