SSCI performance of DFIG with direct controller

SSCI performance of DFIG with direct controller
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带直接控制器的 DFIG 的 SSCI 性能

DOI:
10.1049/iet-gtd.2016.2022
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发表时间:
2017-03
影响因子:
2.5
通讯作者:
Ma Hongwei
Ma Hongwei
中科院分区:
工程技术4区
文献类型:
--
作者:
Wang Liang;Peng Jingyu;You Yuyang;Ma Hongwei

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数学分析表明,双馈感应发电机的定子输出功率可由转子侧变流器的输出电压直接控制。因此,可以引入直接定子功率控制器(DPC)。此外,RSC还具有直接转速控制器(DSC),可以直接控制转子转速。当转子转速作为RSC控制器的反馈时,RSC的等效阻抗可以大大降低。在这种情况下,DFIG将为固定串联补偿引起的串联谐振提供很少的能量。这使得具有DSC的DFIG不受次同步控制相互作用(SSCI)的影响。可以选择将DLP更新为DSC作为现有SSCI的解决方案。特征值分析和时域仿真证明了DSC在抑制SSCI方面的有效性。
Mathematical analysis indicates that stator output power of doubly fed induction generator (DFIG) could be directly controlled by the output voltage of rotor-side converter (RSC). Thus, a direct stator-power controller (DPC) could be induced. Furthermore, rotor speed can be directly controlled by RSC with direct rotor-speed controller (DSC). When the rotor speed is selected as a feedback of RSC controller, the equivalent impedance of RSC could be decreased sharply. Under this condition, DFIG will supply little energy for series resonance caused by fixed series compensation. This results in that DFIG with DSC is insusceptible to subsynchronous control interaction (SSCI). Updating DLP into DSC could be selected as a solution of existing SSCI. Eigenvalue analysis and time-domain simulations prove the effectiveness of DSC in mitigating SSCI.
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