摘要
为深入研究电力系统中常出现的次同步谐振现象,首先对次同步谐振的产生机理进行了分析,其次,阐述了同步发电机电气及轴系的数学模型,推演了隐式梯形积分法下电力系统电气和机械上的差分模型。最后,利用MATLAB软件编程对系统次同步谐振过程进行了数字仿真,并讨论分析了系统参数对次同步谐振的影响。仿真结果表明:系统参数会对轴系扭振响应产生一定的影响,选择适当的网络参数及串联补偿度能够有效地抑制次同步谐振的发生。
In order to study the phenomenon of sub-synchronous resonance in power system deeply, firstly the author analyzes the generating mechanism of sub-synchronous resonanceo. Secondly, the mathematical model of synchronous generator electrical and shafting is expounded, and the electrical and mechanical difference model of the power system with the implicit trapezoidal integral method is deduced as well. Finally, with the aid of Matlab software, the sub-syn- chronous resonance phenomenon is realized in power system digital simulation, and the influence of the system parame- ters on the sub-synchronous resonance is discussed. The simulation results show that system parameters have a certain influence on the shafting torsional vibration response. The appropriate selection of the degree of series compensation and parameters of the transmission network to avoid the shafting torsional vibration natural frequency can effectively suppress the emergence of sub-synchronous resonance.
作者
王鹏
付敏
WANG Peng FU Min(College of Electical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China)
出处
《电力科学与工程》
2017年第9期37-43,共7页
Electric Power Science and Engineering
基金
国家自然科学基金(61573381)
关键词
串联补偿
次同步谐振
轴系扭振
数字仿真
series compensation
sub-synchronous resonance
shafting torsional vibration
digital simulation
