A Linear Inertial Response Emulation for Variable Speed Wind Turbines
A Linear Inertial Response Emulation for Variable Speed Wind Turbines
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DOI：
10.1109/tpwrs.2019.2939411
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发表时间：
2020-03-01
影响因子：
6.6
通讯作者：
Terzija, Vladimir
中科院分区：
文献类型：
--
作者：
Azizipanah-Abarghooee, Rasoul;Malekpour, Mostafa;Terzija, Vladimir
为了仿真变速风力机的惯性响应，文献中提出了一种基于力矩极限的方法。本文首先对传统的TLB方案进行了改进，考虑了VSWT惯性功率的有限斜坡率。结果表明，VSWT转子释放的惯性功率和动能的最大值与其工作点之间存在非线性关系。在此基础上，提出了一种基于VSWT工作点定制惯性仿真关键参数的线性TLB方案，使惯性仿真更加灵活。因此，释放的动能和功率斜坡率可以根据VSWT的功率、转子速度和/或其预留动能的比例来选择。与传统方案相比，推导出的方案显著降低了涡轮上的机械张力。此外，当该策略的参数是根据变风量风电机组的功率进行设计时，只需部署风电场的总发电量即可准确估计相应风电场的惯性响应，而不考虑风电场的装机容量和运行点。此外，还提出了一种利用解析闭合函数来估计减速过程中VSWT惯性响应的新方法。这为大规模系统研究提供了便利。最后，通过一个不同风电穿透水平的典型电网，对推导出的线性惯性仿真的效率进行了评估。
A torque limit-based (TLB) method was proposed in literature in order to emulate inertial response of variable speed wind turbines (VSWTs). In this paper, this conventional TLB scheme is firstly modified by considering a finite ramp rate for inertial power of the VSWT. It is exposed that the maximum values of the VSWT's inertial power and kinetic energy released by its rotor have a non-linear relationship with its operation point. Then, a linear TLB scheme is proposed to make the inertia emulation more flexible by customizing its key parameters based on the VSWT's operating point. Accordingly, the released kinetic energy and power ramp rate can be selected in proportion of the VSWT's power, rotor speed and/or its reserved kinetic energy. The derived scheme offers a significant reduction of the mechanical tensions on the turbine compared to the conventional one. In addition, when the parameters of the proposed strategy is designed according to the VSWT's power, the inertial response of the corresponding wind farm can be exactly estimated only by deploying its total generation, regardless of its wind turbines' installed capacities and operating points. Furthermore, a new approach is projected to estimate the VSWT's inertial response during the deceleration period using an analytical closed-form function. This facilitates large scale system studies. Finally, the efficiency of derived linear inertia emulation is evaluated through a typical grid with various levels of the wind power penetration.