Modeling Method of Wind Turbine Primary Frequency Modulation System Based on Speed ​​Control

Abstract

The invention discloses a wind turbine generator primary frequency modulation system dynamic response modeling method based on the rotation speed control. The modeling method comprises the steps: solving a small-signal increment delta omega del_ref of a wind turbine generator suboptimum rotor speed omega del_ref according to a suboptimum power track model; solving a small-signal increment delta Pm of the mechanical power Pm according to an aerodynamic model; solving a small-signal increment of a related condition variable according to a speed controller model; solving a small-signal increment delta Tadd of additional electromagnetic torque Tadd according to a primary frequency modulation controller model; solving a small-signal increment delta Pe of the electromagnetic power Pe according to a converter model; solving a small-signal increment delta omega r of a wind turbine generator rotor speed omega r according to a generator electromechanical transient model; establishing a state equation of a rotation speed primary frequency modulation control input output system; constructing a system state space model and solving a system input output transfer function. The modeling method is similar to a double-fed wind turbine generator primary frequency modulation system dynamic modeling method which is described by synchronous generator prime motor-speed controller primary frequency modulation system dynamic response, so that a mathematic description method of the wind turbine generator primary frequency modulation response under the power system frequency disturbance can be obtained.

Description

technical field [0001] The invention relates to the technical field of wind power generation system control and modeling, in particular to a modeling method for a primary frequency modulation system of a wind turbine based on speed control. Background technique [0002] The primary frequency regulation of a synchronous generator includes a dynamic response process and a steady-state response process. The dynamic response process is described by the dynamic model of the prime mover and the governor, which can reflect its mechanical power adjustment speed, and the mechanical power can be reflected by the static differential rate Adjust the steady-state amplitude and the effect on the system frequency steady-state response. For primary frequency regulation of wind turbines, although a lot of work has been carried out on control strategies and regulation performance improvement, so far no modeling work has been done on the dynamic response of primary frequency regulation of wind...

AI Technical Summary

Problems solved by technology

For primary frequency regulation of wind turbines, although a lot of work has been carried out on control strategies and regulation performance improvement, so far no modeling work has been done on the dynamic response of primary frequency regulation of wind power, so there is a lack of wind power mechanical power under system frequency disturbance. Mathematical Description Method of Adjusted Dynamic Response Speed ​​and Steady-state Response

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