摘要
借助于相量图在一相励磁故障物理分析的基础上,提出了异步化汽轮发电机一相励磁故障后的双通道励磁控制模型,根据一相励磁故障后电机的基本电磁关系求取了单轴励磁发电机不同有功输出时的控制模型参数,仿真研究了异步化汽轮发电机一相励磁故障后转子单轴励磁运行的过渡过程和单轴励磁时发生机端短路的暂态过程并与不加控制(即非故障相励磁电压保持恒定)的仿真结果进行了比较,结果说明采用双通道励磁控制时,异步化汽轮发电机转入单轴励磁的过渡过程更为平稳及具有良好的暂态性能。对转子两相励磁故障后异步化汽轮发电机转子不可控异步运行进行了简要的分析。
This paper emphasizes the control strategy of asynchronized turbogenerators (ASTGs) after the excitation system doesn't work. First, based on the analysis of (ASTGs) with q or d axis excitation disappearance by means of phasor diagram, dual-passage excitation control model for ASTGs with q or d axis excitation disappearance is presented. Parameters of the excitation control model for ASTGs with q or d axis excitation disappearance are carried out in terms of the basic electromagnetic relation of ASTGs after q or d axis excitation system breaks down. Then, simulation results of the dynamical process of ASTGs from the state of the double-axis excitation into the single-axis excitation as well as the transient performance of 3-phase suddenly shorted-circuit at the terminal of the single-axis excitation turbogenerators are made out. Also same simulation without excitation control that is constant of voltage at the perfect excited axis is got. These simulation results shown that the dynamical process and the transient performance of ASTGs with excitation control are more smoothly than that of ASTGs without excitation control. Finally, the problem which asynchronized turbogenerators turned into uncontrolled induction turbogenerators is discussed briefly when two-axis excitation disappeared.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第8期104-108,共5页
Proceedings of the CSEE
关键词
异步化汽轮发电机
励磁控制
故障
运行行为
仿真
asynchronized turbogenerator (ASTG)
excita-tion disappearance
operation action
