Exploring Dynamic P-Q Capability and Abnormal Operations Associated with PMSG Wind Turbines
Exploring Dynamic P-Q Capability and Abnormal Operations Associated with PMSG Wind Turbines
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DOI：
10.3390/en16104116
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发表时间：
2023-05
期刊：
影响因子：
3.2
通讯作者：
Shahinur Rahman;Shuhui Li;H. Das;Xingang Fu;H. Won;Yang-Ki Hong
中科院分区：
文献类型：
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作者：
Shahinur Rahman;Shuhui Li;H. Das;Xingang Fu;H. Won;Yang-Ki Hong
随着大规模并网风电场的不断增多，永磁同步发电机（PMSG）驱动的4型风力发电机（WT）的次同步振荡（SSO）事件频繁发生。这些事故给电网带来了严重的可靠性风险。传统上，P-Q能力图用于确保同步发电机的安全运行区域。然而，由于能量转换技术的差异和与WT功率转换器相关的几个关键因素，PMSG WT表现出完全不同的动态P-Q能力特性。本文提出了一个全面的动态P-Q能力的PMSG WT的研究，充分和准确的考虑WT的控制和操作中的dq参考框架，其功率转换器的约束，电网动态。首先在dq坐标系下，基于永磁同步风力发电机的控制原理建立了风力发电机的数学模型。在此基础上，从不同角度考虑了小波变换的完备约束条件，给出了小波变换P-Q性能图的求解算法。本文从动态P-Q能力的角度分析了文献报道的并网型PMSG风力发电机异常运行的根本原因。通过并网型4 WT的电磁暂态（EMT）模型验证了所提出的研究。
With the proliferation of large-scale grid-connected wind farms, subsynchronous oscillation (SSO) incidents associated with Type-4 wind turbines (WTs) with a permanent magnet synchronous generator (PMSG) have occurred frequently. These incidents have caused severe reliability risks to the power grid. Conventionally, P-Q capability charts are utilized to ensure the safety operating region of a synchronous generator. However, a PMSG WT exhibits completely different and dynamic P-Q capability characteristics due to the difference in energy conversion technique and several critical factors related to the WT power converters. This paper presents a comprehensive dynamic P-Q capability study of a PMSG WT with sufficient and accurate considerations of the WT control and operation in the dq reference frame, its power converter constraints, and grid dynamics. Models of a PMSG WT are first developed based on its control principle in the dq reference frame. Then, algorithms for obtaining the P-Q capability charts of the WT are developed with the considerations of complete WT constraints in different aspects. The study analyzes the root cause of many abnormal operations of grid-connected PMSG WTs, reported in the literature, from the dynamic P-Q capability perspectives. The proposed study is verified via an electromagnetic transient (EMT) model of a grid-connected Type-4 WT.