Research On Wind Turbine Emulation System Based On Power Hardware-in-the-loop

The wind energy development and utilization is concerned widespread due to the environmentalpollution and energy crisis. Laboratory is the source of scientific research and the base, theestablishment of wind turbine emulation system used to the development of the control algorithm andthe test experiment of the wind turbine performance has practical significance and application value.The wind turbine emulation system based on power hardware-in-the-loop (PHIL) is studied in thispaper, shortening the development cycle, reducing the development cycle, avoiding the limitcondition of risk and laying foudation of further research on the performance of the wind powersystem. The paper introduces the development situation of the PHIL simulation technology, andanalyzes the current research status of wind turbine emulation strategy.Firstly, the aerodynamics of wind turbine is introduced, and the function fitting of the wind energyutilization coefficient curve of GE1.5MW wind turbine is researched. The small power wind turbineemulation principle prototype can predict the feasibility of high power wind turbine operationcharacteristics, which is verified based on the similarity theory. The change of the parameters isexplored about the wind turbine shrinkage ratio. The stable operation area of the wind turbine systemis analyzed theoretically in the continuous domain and the discrete domain.Secondly, the principle and the simulation characteristic of the emulation strategy commonly usedin the emulation system are analyzed, such as speed signal amplification and torque signalamplification based on acceleration feedback signal, illustrating the advantages and disadvantages ofexisting wind turbine simulation strategy. A novel emulation strategy based on torque pseudoderivative feedback to realize the torque signal amplification is proposed. The simulation results ofthe novel control strategy in MATLAB/Simulink show the validity.Finally, the emulation system based on PHIL is built. The hardware and software designs areintroduced. On this basis, the experimental results of the emulation strategies mentioned abovevalidate the correctness of the theoretical analysis and the simulation analysis and effectiveness.