| 引用本文: | 王鹤,李嘉帅,周鹤伦,王悦,李鸿鹏.基于自适应模式切换的双馈风机并网数字物理混合仿真新型接口算法[J].电力自动化设备,2021,41(12): |
| WANG He,LI Jiashuai,ZHOU Helun,WANG Yue,LI Hongpeng.New interface algorithm of digital physical hybrid simulation for grid-connected DFIG based on adaptive mode switching[J].Electric Power Automation Equipment,2021,41(12): |
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| 摘要: |
| 数字物理混合仿真已成为交直流混合电力系统的重要研究手段，而接口算法是决定仿真系统稳定性和精确度的核心内容。为实现新能源经柔性直流输电外送的数字物理混合仿真，将数字物理混合仿真应用于双馈风机，设计了一种自适应模式切换的新型接口算法。根据阻尼阻抗匹配法的结构原理，建立了物理模拟双馈风机的动态等效阻抗模型；针对阻尼阻抗匹配法在双馈风机动态过程放大谐波电流的现象，在功率接口与数字侧之间增加滤波支路，并以双馈风机电流直流分量含有率为依据设计了支路开关的切换条件以防止开关误动作。采用小波神经网络时间序列预测法对物理侧双馈风机转速的传输进行了延时补偿，有效地提高了动态阻抗匹配算法的精确度。通过数字仿真对传统接口算法与新型接口算法的稳定性和精确度进行对比，最后搭建了双馈风机数字物理混合仿真实验平台，验证了所提算法的可行性。 |
| 关键词: 双馈风机 数字物理混合仿真 阻尼阻抗匹配 模式切换 延时补偿 |
| DOI：10.16081/j.epae.202107023 |
| 分类号:TM76;TM614 |
| 基金项目:国家重点研发计划项目(2019YFB1505402) |
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| New interface algorithm of digital physical hybrid simulation for grid-connected DFIG based on adaptive mode switching |
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WANG He1, LI Jiashuai1, ZHOU Helun1, WANG Yue2, LI Hongpeng3
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1.Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education, Northeast Electric Power University, Jilin 132012, China;2.Liaoning Lightning Protection Technical Service Center, Shenyang 110000, China;3.Economic Research Institute of State Grid Anhui Electric Power Co.,Ltd.,Hefei 230000, China
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| Abstract: |
| The digital physical hybrid simulation has become an important research method of AC/DC hybrid power system, and interface algorithm is the core content to determine the stability and accuracy of simulation system. In order to realize the digital physical hybrid simulation of new energy through flexible DC transmission, the digital physical hybrid simulation is applied to DFIG(Doubly Fed Induction Generator),and a new interface algorithm of adaptive mode switching is designed. According to the structural principle of damping impedance method, the dynamic equivalent impedance model of physically simulated DFIG is established. In view of the phenomenon that the impedance method will amplify the harmonic current in the dynamic process of DFIG, a filter branch is added between the power interface and the digital side, and the switching conditions of the branch switch are designed based on the proportion of the DC component of DFIG to prevent switch misoperation. The wavelet neural network predictive algorithm for time series is used to compensate the transmission delay of DFIG speed in physical side, which effectively improves the accuracy of dynamic impedance matching. Through digital simulation, the stability and accuracy of the traditional interface algorithm and the new interface algorithm are compared. Finally, a digital physical hybrid simulation platform for DFIG is built to verify the feasibility of the proposed algorithm. |
| Key words: DFIG digital physical hybrid simulation damping impedance matching mode switching delay compensation |
