Modeling of Grid-Connected DFIG-Based Wind Turbines for DC-Link Voltage Stability Analysis
Modeling of Grid-Connected DFIG-Based Wind Turbines for DC-Link Voltage Stability Analysis
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DOI：
10.1109/tste.2015.2432062
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发表时间：
2015-06
影响因子：
8.8
通讯作者：
Jiabing Hu;Yunhui Huang;Dong Wang;Hao Yuan;Xiaoming Yuan
中科院分区：
文献类型：
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作者：
Jiabing Hu;Yunhui Huang;Dong Wang;Hao Yuan;Xiaoming Yuan
并网型双馈感应发电机（DFIG）系统的电磁稳定性问题通常被忽视。本文提出了一种降阶小信号模型，可用于分析DFIG直流侧电压控制系统的稳定性，特别是在弱交流电网条件下。该模型忽略了双馈发电机磁通和快速电流控制动态。然而，考虑了操作点、电网强度和控制回路相互作用对系统动态性能的影响。特征值比较表明，该模型保持了详细模型的主导振荡模式，适用于双馈风力发电机直流侧电压控制系统的稳定性分析。还提出了反映控制回路相互作用的影响系数。该模型的应用研究表明，它是合适的说明电网强度的DFIG直流母线电压控制系统的动态性能的影响。同时，还探讨了锁相环（PLL）和转子侧变流器（RSC）的有功功率控制（APC）/无功功率控制（RPC）对系统稳定性的影响。
The electromagnetic stability issues of the grid-connected doubly fed induction generator (DFIG) system are usually overlooked. This paper presents a reduced order small-signal model that can be used to analyze the stability of DFIGs dc-link voltage control system, especially under weak ac grid conditions. This model neglects DFIG flux and fast current control dynamics. However, the effects of operating points, grid strengths and control loops interactions on system dynamic performance are taken into account. An eigenvalue comparison shows the proposed model holds dominant oscillation mode featured by the detailed model and is suitable for stability analysis of dc-link voltage control system of DFIG. Influence coefficients reflecting control loops interactions are also presented. Application studies of the proposed model show it is suitable for illustrating the effect of grid strength on dynamic performance of the DFIGs dc-link voltage control system. Meanwhile, phase-locked loop (PLL) and rotor-side converter (RSC) active power control (APC)/reactive power controls (RPC) effect on system stability are also explored.