Wind turbine simulator without operating rotating speed differential and control method thereof

Abstract

The invention discloses a wind turbine simulator without operating rotating speed differential and a control method of the wind turbine simulator without operating rotating speed differential and belongs to the technical field of motor control. The wind turbine simulator comprises a direct current power supply, a three-phase inverter, a motor and a control circuit. The control circuit comprises an isolated driving circuit, a voltage and current sampling circuit, a position detecter, a velocity calculation circuit, a torque observer, a wind turbine torque calculation module, a first summator,an integrator, a second summator, a multiplying unit, a mechanical friction compensation module and a rotational inertia compensation module. The control method considers the influence of mechanical friction coefficient and rotational inertia and obtains driving signals of the isolated driving circuit according to the rotating speed of the motor, three-phase input voltage and three-phase input electrical current calculation torque of the motor. The wind turbine simulator without operating the rotating speed differential and the control method of the wind turbine simulator without operating the rotating speed differential reduces the influence which the differential operation exerts on the stability of the system, reduces phase shift of the rotating speed on a frequency domain and increases precision and adaptability of the simulator.

Description

technical field [0001] The invention discloses a wind turbine simulator and a control method thereof which do not need differential operation of the rotational speed, and belongs to the technical field of motor control. Background technique [0002] In order to alleviate the energy crisis and environmental crisis, more and more scholars are committed to the research and utilization of new energy sources such as wind energy, solar energy, and tidal energy. With the development of control technology, it has become more and more mature, and it has become one of the technologies with the most large-scale development conditions and commercial development prospects. [0003] In order to further improve the efficiency and reliability of the wind power system and reduce the system cost, the laboratory's early exploration and research play an important guiding role in the development of wind power technology. It is the most direct and the most authentic and credible situation to con...

AI Technical Summary

Problems solved by technology

The existing wind turbine simulator introduces a differential link when calculating the compensation torque, and the differential link is easy to introduce noise, which will cause system oscillation or even instability

In order to reduce the system oscillation problem caused by the differential calculation, a low-pass filter link is added after the differential calculation, but the parameter value of the low-pass filter is designed according to the different moment of inertia of the wind turbine, which is not universal

On the other hand, the introduction of the low-pass filter will bring about the phase shift of the frequency domain characteristics of the speed, which will have a direct impact on the performance of the wind turbine simulation system

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