构网型直驱风机的小信号建模及动态频率支撑策略  

Small-signal Modeling and Dynamic Frequency Support Strategy for Permanent Magnetic Synchronous Generator under Grid-forming Control

作　　者：王健维 孟建辉[1] 王毅[1] 杨坚 汤义勤 王东旭[1] WANG Jianwei;MENG Jianhui;WANG Yi;YANG Jian;TANG Yiqin;WANG Dongxu(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Baoding 071003,China;State Grid Taizhou Power Supply Company,Taizhou 318000,China)

机构地区：[1]华北电力大学新能源电力系统全国重点实验室,保定071003 [2]国网台州供电公司,台州318000

出　　处：《电力系统及其自动化学报》2024年第5期48-58,共11页Proceedings of the CSU-EPSA

基　　金：国网浙江省电力有限公司科技项目(5211TZ230003)。

摘　　要：针对传统构网型直驱风机在大扰动下的频率和功率振荡较大的问题,提出一种动态频率支撑策略。首先对构网型直驱风机进行了详细的小信号建模。其次,通过主导特征根轨迹分析有功频率控制以及交流电压控制环节中参数对频率变化特性的影响,进而提出一种灵活改变控制参数的动态频率支撑策略。最后,在Matlab/Simulink仿真平台上搭建仿真模型,验证了小信号建模的正确性和所提策略的有效性,表明所提策略能有效减小动态过程中的频率和功率振荡。Aimed at the problem that the frequency and power of a traditional grid-forming permanent magnetic synchronous generator oscillate greatly under large disturbance,a dynamic frequency support strategy is proposed in this paper.First,a detailed small-signal modeling of the grid-forming permanent magnetic synchronous generator is carried out.Second,the influences of parameters in active frequency control and AC voltage control links on the frequency variation characteristics are analyzed through the dominant characteristic root trajectory,and a dynamic frequency support strategy with flexible control parameters is put forward accordingly.Finally,simulations are performed on the Matlab/Simulink platform,which verifies the correctness of small-signal modeling and the effectiveness of the proposed strategy.It is concluded that this strategy can effectively reduce the frequency and power oscillations during the dynamic process.

关 键 词：构网型控制 永磁直驱风机 小信号建模 主导特征根 动态频率支撑策略 

分 类 号：TM713[电气工程—电力系统及自动化]