Active disturbance rejection control method of direct-driven permanent magnet synchronization wind power system

Abstract

The invention discloses an active disturbance rejection control method of a direct-driven permanent magnet synchronization wind power system. The invention relates to the technical field of wind power, in particular to the active disturbance rejection control method of the direct-driven permanent magnet synchronization wind power system. The direct-driven permanent magnet synchronization wind power system comprises a draught fan, a permanent magnet synchronous generator (PMSG), a machine side converter, a capacitor, a network side converter and a power network. According to the active disturbance rejection control method of the direct-driven permanent magnet synchronization wind power system, a rotor field orientation double-closed-loop vector control strategy is adopted, an outer loop is a speed loop, an inner loop is a current loop, and the machine side converter is controlled to operate. The active disturbance rejection control method can reasonably manage a transient process for a preset rotating speed signal according to the bearing capacity of the direct-driven permanent magnet synchronization wind power system, reduces the overshoot of the rotating speed of the PMSG when the direct-driven permanent magnet synchronization wind power system starts to respond, increases control accuracy and operational stability of the direct-driven permanent magnet synchronization wind power system, has a disturbance feedforward compensation function, and increases capacity, for resisting disturbance, of the direct-driven permanent magnet synchronization wind power system.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an active disturbance rejection control method for a direct-drive permanent magnet synchronous wind power generation system. Background technique [0002] In recent years, renewable energy power generation has received great attention and development. At present, wind power generation is one of the fastest-growing renewable energy power generation technologies, and one of the power generation methods with the most development scale and development prospects. [0003] With the rapid development of wind power generation and power electronics technology, variable speed and constant frequency wind power technology has gradually replaced the constant speed and constant frequency technology. Variable-speed constant-frequency wind turbines mainly include doubly-fed asynchronous wind turbines and direct-drive permanent magnet synchronous wind turbines (PMSG). Compared wit...

AI Technical Summary

Problems solved by technology

Since the direct drive permanent magnet wind power generation system is a multivariable, strongly coupled, nonlinear system, the traditional PI regulator is difficult to meet the requirements of the actual system under different working conditions, such as: the PI regulator is completely dependent on the controlled object; PI control often causes a large overshoot when the system starts to run; PI control is a linear combination, which is difficult to meet the high-performance control requirements of nonlinear systems in actual engineering

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