| 引用本文: | 张祥宇,沈文奇,黄弘扬,彭琰,马骏超,陆承宇.基于功率耦合的双馈风机并网系统同步控制技术[J].电力自动化设备,2022,42(12): |
| ZHANG Xiangyu,SHEN Wenqi,HUANG Hongyang,PENG Yan,MA Junchao,LU Chengyu.Synchronization control technology of grid-connected DFIG system based on power coupling[J].Electric Power Automation Equipment,2022,42(12): |
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| 摘要: |
| 双馈风机处于虚拟同步运行时与同步发电机的功率耦合关系是合理设计控制参数、降低附加运行风险的关键。建立双馈风机并网系统的动态模型，分析处于虚拟同步运行时的双馈风机与同步发电机之间的功率耦合关系。分析风机同步并网耦合关系及控制参数对稳定性的影响，并引入耦合系数。基于此，提出基于功率耦合的双馈风机同步并网优化控制策略，通过动态调整风机虚拟惯量使双馈风机同步并网系统处于稳定运行区域，从而降低运行风险。最后，通过搭建双馈风机同步并网仿真系统验证了风电机组能够根据系统运行状态的动态变化提供虚拟惯量响应，从而为并网系统提供可靠的动态稳定支撑。 |
| 关键词: 双馈风机 功率耦合 虚拟同步机 耦合关系 虚拟惯量 |
| DOI：10.16081/j.epae.202204046 |
| 分类号:TM315 |
| 基金项目:国网浙江省电力有限公司科技项目(B311DS21000G) |
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| Synchronization control technology of grid-connected DFIG system based on power coupling |
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ZHANG Xiangyu1, SHEN Wenqi1, HUANG Hongyang2, PENG Yan2, MA Junchao2, LU Chengyu2
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1.State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Baoding 071003, China;2.Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014, China
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| Abstract: |
| The power coupling relationship between DFIG(Doubly-Fed Induction Generator) in the operation of virtual synchronous and synchronous generator is the key to design control parameters and reduce the additional operation risk. The dynamic model of grid-connected DFIG system is established to analyze the power coupling relationship between DFIG in the operation of virtual synchronous and synchronous generator. The influences of the synchronization grid-connected coupling relationship of wind turbine and control parameters on stability are analyzed, and then the coupling coefficient is introduced. On this basis, the synchronization grid-connected optimal control strategy of DFIG based on power coupling is proposed, in which the virtual inertia of wind turbine is dynamically adjusted to make the grid-connected DFIG system in the stable operation area, so as to reduce the operation risk. Finally, the synchronization grid-connected DFIG simulation system is built to verify that the wind turbine can provide virtual inertia response according to the dynamic variation of system’s operating state, so that providing reliable dynamic support for the grid-connected system. |
| Key words: DFIG power coupling virtual synchronous generator coupling relationship virtual inertia |
