Pitch control method of condensed wind energy type wind turbine based on power multiplication characteristics

Abstract

The invention belongs to the technical field of wind power generation and particularly relates to a concentrated wind energy type wind turbine set variable-pitch control method based on a power multiplication characteristic. According to the control method, through research on a traditional concentrated wind energy type wind turbine set structure and a power characteristic, a subsection power tracking type fuzzy-PID variable-pitch control strategy is put forward. Through adoption of the basic theory and method of fuzzy mathematics, regular conditions and operation are represented through a fuzzy set and stored in a computer knowledge base as knowledge, best setting of PID parameters is realized automatically by using fuzzy reasoning by a computer according to actual response conditions of a control system, the power change characteristic of a concentrated wind energy type wind turbine set is fully considered by subsection fuzzy control, and the working condition of the turbine set is controlled section by section, so that the non-linearization degree of a controlled object in each section is reduced, meanwhile, setting of parameters Kp, Ki and Kd is simplified and the advantages of simple structure, good stability, high working reliability and high convenience in adjustment are fully developed.

Description

Technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a variable pitch control method of a concentrated wind energy type wind turbine based on power multiplication characteristics. Background technique [0002] The theoretical basis of concentrated wind energy wind turbines is the theory of concentrated wind energy. The core of the concentrated wind energy theory is the law of conservation of energy, that is, the thin wind energy is accelerated, rectified and homogenized by the concentrated wind energy device, and then the impeller is driven to rotate and generate electricity, thereby increasing the energy flow density of wind energy, improving the instability of wind energy, and increasing wind energy. grade. With its inherent advantages, concentrated wind energy wind turbines can be widely used in areas with various wind speeds and air densities. [0003] Concentrated wind energy type wind turbine has its uniq...

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Problems solved by technology

[0004] Moreover, under the conventional pitch control strategy, the pitch rate is not higher than 6° / s. Directly applying it to the concentrated wind energy type wind turbine cannot solve the problem of power tracking, but will bring more system failures. stability factor, and rigidly increasing the pitch rate will lead to system instability

[0005] PID control has the advantages of simple control principle, convenient use, strong adaptability, strong robustness, and strong anti-interference ability. However, due to the complicated setting methods of conventional PID parameters, its parameters are often difficult to set, resulting in poor performance.

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