转子阻尼结构对双轴励磁发电机功率跟踪励磁控制特性的影响  

Influence of Rotor Damping Structures on Power Tracking Excitation Control Characteristics of Dual-excited Synchronous Generator

作　　者：许国瑞[1] 傅悦 张建承 XU Guorui;FU Yue;ZHANG Jiancheng(School of Electrical and Engineering,North China Electric Power University,Changping District,Beijing 102206,China;State Grid Zhejiang Electric Power Research Institute,Hangzhou 310014,Zhejiang Province,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]国网浙江省电力有限公司电力科学研究院,浙江省杭州市310014

出　　处：《中国电机工程学报》2025年第3期1137-1147,I0028,共12页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国网浙江省电力有限公司科技项目(5211DS23000G)。

摘　　要：双轴励磁同步发电机(双励机)可以通过调节励磁磁动势的大小和方向,独立控制有功、无功功率以增强其抑制系统振荡的能力。然而,双励机转子本体阻尼会影响励磁磁动势的响应速度,进而影响机组动态特性。该文将双励机的二维瞬态电磁场模型与定、转子电路方程相结合,建立双励机的场-路耦合时步有限元模型;以系统三相突然短路引起的大扰动为例,研究转子槽楔、铁心等本体阻尼结构对功率跟踪励磁控制特性的影响,揭示各阻尼结构对动态特性指标的影响规律;为提升双励机动态性能,采用模糊控制法对励磁控制参数进行优化,获得了适用于不同转子阻尼结构的最优励磁控制参数。研究结果可为双励机动态特性的改善和系统阻尼作用的提升提供理论支撑。The dual-excited synchronous generator(DESG)can control the active and reactive power independently by regulating the magnitude and direction of the excitation magnetomotive force(mmf)so as to enhance its ability for suppressing system oscillations.However,the rotor body damping structures of the DESG will affect the response speed of the excitation mmf,and then affect the dynamic characteristics of the unit.In this paper,the field-circuit coupling time-stepping finite element model of the DESG is established by combining the 2-D transient electromagnetic with the stator and rotor circuit equations.Taking the large disturbance caused by the three-phase sudden short circuit of the system as an example,the influence of the damping structures,such as the rotor slot wedges and the rotor core,on the characteristics of the power tracking excitation control(PTEC)is studied,and the effect law of different damping structures on the characteristics indexes of the low frequency oscillation is revealed.In order to improve the dynamic performance of the DESG,the fuzzy control method is used to optimize the excitation control parameters,and the optimal excitation control parameters suitable for different rotor damping structures are obtained.The research results can provide the theoretical support for the improvement of the dynamic characteristics for the DESG and the increment of the system damping effect.

关 键 词：双轴励磁同步发电机 转子阻尼结构 功率跟踪励磁控制 动态特性 

分 类 号：TM341[电气工程—电机]