| 引用本文: | 曹娜,辛贵峰,于群.计及锁相环的直驱风电机组间相互作用模型及机理分析[J].电力自动化设备,2021,41(8): |
| CAO Na,XIN Guifeng,YU Qun.Interaction model and mechanism analysis of direct-drive wind turbines considering PLL[J].Electric Power Automation Equipment,2021,41(8): |
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| 摘要: |
| 为了研究直驱风电机组间的相互作用，提出考虑锁相环的直驱风电机组间相互作用模型及分析方法。首先考虑频率耦合特性，利用谐波线性化方法建立单台直驱风电机组序导纳模型。其次考虑锁相环建立2台直驱风电机组间相互作用模型，研究2台机组之间的相互作用机理。然后根据锁相环动态特性，将其分为衰减振荡状态和非振荡状态，分析锁相环在不同情况下对2台直驱风电机组间相互作用的影响，研究总结了锁相环对2台机组间相互作用振荡特性的作用规律。最后对2台直驱风电机组并网系统进行时域仿真，并与频域分析进行对比，验证了考虑锁相环的2台机组间相互作用模型及分析方法的合理性。 |
| 关键词: 锁相环 直驱风电机组 频率耦合 导纳模型 相互作用 |
| DOI：10.16081/j.epae.202106003 |
| 分类号:TM712;TM614 |
| 基金项目:国家电网公司科技项目(XTB17201800166)；山东省自然科学基金资助项目(ZR2016EEM13) |
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| Interaction model and mechanism analysis of direct-drive wind turbines considering PLL |
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CAO Na, XIN Guifeng, YU Qun
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College of Electrical Engineering and Automation, Shandong University of Science and Technology, Qingdao 266590, China
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| Abstract: |
| In order to study the interaction of direct-drive wind turbines, an interaction model and analysis method for direct-drive wind turbines are proposed considering PLL(Phase Locked Loop). Firstly, considering the frequency coupling characteristics, the harmonic linearization method is used to establish the sequence admittance model of single direct-drive wind turbine; Secondly, the interaction model between two direct-drive wind turbines is established to study the interaction mechanism. Then, according to the dynamic characteristics of PLL, it is divided into attenuated oscillation state and non-oscillatory state, the influence of PLL on the interaction of two direct-drive wind turbines under different modes is analyzed, and the action law of PLL on the interaction oscillation characteristics of two direct-drive wind turbines is studied and summarized. Finally, the time-domain simulation of the grid-connected system with two direct-drive wind turbines is conducted and compared with the frequency-domain analysis to verify the rationality of the interaction model between two units considering PLL and analysis method. |
| Key words: phase locked loops direct-drive wind turbines frequency coupling admittance model interaction |
