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An Optimized Strategy of Switching Crowbar Improve LVRT of DFIG Based on RTDS

机译：基于RTDS的DFIG切换撬棍的优化策略

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摘要

The mathematical models of 2MW doubly-fed induction generator (DFIG) wind power generation system under steady and transient state are built in this paper. On the basis theory of control strategy and crowbar circuit parameter optimization, a complete model of DFIG low voltage ride through (LVRT) system is developed by real time digital simulator (RTDS). There is improvement in traditional crowbar protection method during quantitative simulation of grid voltage sag. An improved LVRT strategy of DFIG wind turbine by changing time of switching crowbar circuit is proposed in this paper. Contrastive study between traditional and improved LVRT method is provided to verify the performance of doubly-fed wind power system. Results show that the proposed method can realize uninterrupted operation of DFIG and meet the requirements of LVRT under grid voltage sag.
机译：本文建立了2MW双馈感应发电机（DFIG）风发电系统的数学模型。在控制策略和撬棍电路参数优化的基础上，通过实时数字模拟器（RTD）开发了一种完整的DFIG低电压骑行型号（LVRT）系统的模型。传统撬棍保护方法在网格电压凹槽的定量模拟过程中有所改善。本文提出了一种改进DFIG风力涡轮机的改进的LVRT策略。本文提出了改变开关撬杆电路的时间。提供了传统和改进的LVRT方法的对比研究，以验证双馈风电系统的性能。结果表明，该方法可以实现DFIG的不间断运行，并满足电网电压下的LVRT的要求。

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