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Inertia compensation scheme of WTS considering time delay for emulating large-inertia turbines

机译：考虑时间延迟的WTS惯性补偿方案模拟大惯量涡轮机

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摘要

Wind turbine simulators (WTSs), devised for pre-validation of control strategies for wind energy conversion system, commonly employ the inertia compensation scheme for reproducing mechanical behaviours similar to real wind turbines (WTs). However, it is found in this study that when a WT with large inertia is simulated, the time delay in command communication from control unit to motor driver, usually neglected in the existing inertia compensation scheme, results in the oscillating acceleration response and consequently leads to instability of the WTS system. As a result, the existing WTS is unable to stably simulate large-inertia WTs, which significantly limits its applicability. Hence, in this study, a linear discrete model of the inertia compensation part that considers time delay of acceleration observation and communication is developed. On the basis of this model, an improved inertia compensation scheme in which a high-order filter is introduced to eliminate the deviation of acceleration response caused by the two types of time delay is proposed. Finally, the improved inertia compensation scheme and its applicability to simulating a 600 kW WT developed by National Renewable Energy Laboratory are experimentally verified.
机译：设计用于对风能转换系统的控制策略进行预验证的风力涡轮机模拟器（WTS），通常采用惯性补偿方案来再现类似于真实风力涡轮机（WTs）的机械性能。然而，在这项研究中发现，当模拟具有大惯性的WT时，通常从现有惯性补偿方案中忽略的，从控制单元到电机驱动器的命令通信的时间延迟会导致振荡的加速度响应，从而导致WTS系统的不稳定。结果，现有的WTS无法稳定地模拟大惯性WT，这极大地限制了其适用性。因此，在本研究中，开发了考虑加速度观测和通信的时间延迟的惯性补偿部分的线性离散模型。在此模型的基础上，提出了一种改进的惯性补偿方案，其中引入了高阶滤波器以消除两种类型的时延引起的加速度响应偏差。最后，通过实验验证了改进的惯性补偿方案及其在国家可再生能源实验室开发的600 kW WT仿真中的适用性。

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