风力机模拟器的阻尼补偿策略与实验验证

风力机模拟器作为模拟实际风力机的重要工具,可以简化风电研究的实验过程、缩短研发周期。由于模拟器的转动惯量远小于实际风力机,现有研究主要关注于应用转动惯量补偿算法的模拟器的稳定性问题。文中发现忽略阻尼或阻尼补偿不准确会严重影响模拟的准确性,导致转速偏低以至无法准确模拟实际风力机的机械动态过程,并完善了风力机模拟器的传动链模型,分析了风力机模拟器与实际风机传动链的阻尼差异对动态模拟准确性的影响机理,并设计了风力机模拟器的阻尼补偿策略。基于最大功率点跟踪控制实验验证了阻尼补偿策略,结果表明改进后的风力机模拟器能够更加准确地复现风力机的机械动态过程。

Damping Compensation Strategy of Wind Turbine Simulator and Experimental Verification

As an important tool to emulate real wind turbine, wind turbine simulator (WTS) can simplify the experimental process and shorten the development cycle for wind power research. Because the inertia of WTS is much smaller than that of the actual wind turbine, current researches are mainly concerned with the stability of the simulated wind turbine. However, the accuracy of the WTS will be significantly affected if the damping issue was not properly handled, which will result in low speed or even affect the efficiency of WTS. In this paper, the drive train model of WTS is improved and the impact of damping on the accuracy of WTS is analyzed. The improved simulation strategy based on damping compensation is designed and implemented on the WTS experimental platform. Experiments on the maximum power point tracking control of the wind turbine validate that the improved WTS can simulate the mechanical dynamics of the wind turbine with higher accuracy.