Centralised solution for subsynchronous control interaction of doubly fed induction generators using voltage-sourced converter
Centralised solution for subsynchronous control interaction of doubly fed induction generators using voltage-sourced converter
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DOI：
10.1049/iet-gtd.2015.0720
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发表时间：
2015-12
影响因子：
2.5
通讯作者：
Liang Wang;Xiaorong Xie;Qirong Jiang;Xiangdong Liu
中科院分区：
文献类型：
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作者：
Liang Wang;Xiaorong Xie;Qirong Jiang;Xiangdong Liu
在双馈感应发电机风电场中观察到了实际的次同步不稳定事件，这些风电场径向连接到固定的串联补偿输电线路。作为一种特殊的次同步谐振，这种现象在这里被描述为次同步控制相互作用(SSCI)。本研究提出一种称为次同步阻尼器(SSD)的集中式SSCI缓解方案。在该方案中，在风电场的采集母线上增加了一个大功率电压型变流器。它的设计是为了消散SSCI的电谐振功率。因此，SSD为SSCI提供了正阻尼值。用等效电路解释了它的基本原理，并从数学上得到了稳定的充分条件。给出了控制器的设计准则，并通过特征值分析进行了验证。在此基础上，提出了一种选择电力电子变流器容量的方法。最后，通过对目标系统的广泛的时域仿真，验证了SSD的有效性。
Practical subsynchronous instability events have been observed in doubly fed induction generator-based wind farms, which are radially connected to fixed series compensated transmission lines. As a special type of subsynchronous resonance, this phenomenon is described here as subsynchronous control interaction (SSCI). This study proposes a centralised SSCI mitigation scheme named as subsynchronous damper (SSD). In this scheme, an additional high-power electronic voltage-sourced converter is added to the collection bus of wind farms. It is designed to dissipate the electrical resonance power of SSCI. Thus, SSD provides positive damping for SSCI. Its basic principle is explained with equivalent electric circuit and the sufficient conditions for stabilisation are obtained mathematically. Controller design guidelines are given and have been verified first by eigenvalue analysis. Then a method to choose the capacity of power electronic converter is proposed. The effectiveness of SSD is finally demonstrated by extensive time-domain simulations on a target system.