Individual pitch control system with controller policy and pitch control method

Abstract

The invention discloses an individual pitch control system with a controller policy and a pitch control method, and belongs to the technical field of wind power industry. The individual pitch control system comprises a wind driven generator unit main control controller, a variable pitch controller, three sets of servo drives corresponding to blades, a spare power supply, a pitch control motor, an encoder and a limiting switch; the variable pitch controller is respectively communicated with the wind driven generator unit main control controller and the three servo drives; each servo drive is respectively connected with the pitch control motor, the motor encoder, the spare power supply and the limiting switch; the motor encoder is mounted at the tail end of the pitch control motor; and the angle encoder is engaged and linked with blade bearing inner teeth through measuring gears. The individual pitch control system can realize individual pitch control function through the variable pitch controller, realizes safety protection for fault diagnosis, state monitoring, lightning protection and battery management, can properly reduce the fatigue load of fan blades, prolongs the unit service life, is simple and reliable in control, has no need to additionally provide excessive hardware, is lower in cost, and is higher in safety.

Description

technical field [0001] The invention belongs to the technical field of wind power industry, and in particular relates to an independent pitch changing system and a pitch changing method with a controller strategy. Background technique [0002] With the development of wind power generation, in the 1980s, the installed capacity of wind power generators was still very small, and the technology was not mature enough. By the middle of the 1990s, the world's wind power generation technology had achieved rapid development. The design and manufacturing technology became more mature, and the products entered In the commercialization stage, the power level ranges from tens of kilowatts to hundreds of kilowatts, and gradually develops into mega-level. [0003] The earliest foreign wind turbines mainly used electric fixed-pitch systems. For electric fixed-pitch wind turbines, the wind energy utilization coefficient is high in the low wind speed section, and when the wind speed is close...

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Problems solved by technology

Therefore, electric fixed-pitch wind turbine

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