Method for simulating dynamic characteristics of wind turbine system

Abstract

The invention discloses a method for simulating dynamic characteristics of a wind turbine system. The method comprises the following steps: (1) establishing time domain motion equations of an actual wind turbine system and a wind turbine simulation system; (2) simultaneously establishing a motion equation of the wind turbine system and the simulation system to obtain a simulation motor electromagnetic torque; (3) substituting the generator electromagnetic torque at the previous moment into a simulated motor electromagnetic torque calculation formula to obtain a simulated motor electromagnetictorque value at the current moment; and (4) carrying out torque closed-loop control on the simulation system according to the torque reference value of the simulation motor, so that the output torqueof the simulation motor follows a given value, and the simulation of the mechanical characteristics of the actual wind turbine system is completed. Compared with a traditional wind turbine simulationsystem, one-step delay introduced by an acceleration term can be eliminated, the dynamic characteristics of the wind turbine can be more accurately reproduced, and meanwhile the influence of sudden change of the aerodynamic torque of the wind turbine on the torque of the simulation motor can be reduced.

Description

technical field [0001] The invention relates to a method for simulating the dynamic characteristics of a wind turbine system. Background technique [0002] The wind turbine simulation system has the characteristics of high efficiency, flexibility and low cost, which greatly reduces the difficulty of studying the wind turbine system, and is of great significance to the development of wind power generation technology. The wind turbine simulation system uses electric motors instead of wind turbines to simulate the torque and speed output by wind turbines to drive generators and reproduce the dynamic and static characteristics of wind turbine systems. When there is no change in wind speed and load torque, the simulation system can stably and accurately reproduce the static characteristics of the wind turbine system. The simulation process is relatively easy, but when the load or wind speed changes, it is easier to reproduce the dynamic change process of speed and torque. for co...

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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide a high-precision simulation method for simulating the dynamic characteristics of the wind turbine system, and solve the problem of instability of the wind turbine simulation system caused by sudden changes in the torque of the wind turbine without filtering and without delay

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