摘要
针对轴系参数相近的火电机组在受扰动后因扭振特征相近而导致过多切机的问题,提出了一种新的扭振保护协调控制方法,通过在火电厂侧建立全厂扭振保护决策中心,实时获取影响次同步谐振/振荡的关键因素,分析扭振保护切机动作前后次同步谐振/振荡的发展趋势,实现全厂扭振保护动作的协调。以某电厂送出系统为研究对象,对优化后的保护协调控制方法进行仿真验证。结果表明,该方法能够有效避免机组过多切机问题,提高机组运行的经济性。
With similar shafting parameters, the torsional vibration characteristics of thermal power units after disturbance are basically the same, which results in too many machine cuts. In this paper, a new coordination control method of torsional vibration protection is proposed. By establishing the torsional vibration protection decision center of the whole plant at the side of thermal power plant, the key factors affecting subsynchronous oscillation/resonance is obtained in real time, and the development trend of subsynchronous oscillation/resonance before and after torsional vibration protection cutting machine action is analyzed to realize the coordination of torsional vibration protection action of the whole plant. Taking the transmission system of a power plant in northern Shaanxi as the research object, this paper verifies the protection coordinated control method after optimal design through simulation. Finally, the results show that this method can effectively avoid the problem of excessive cutting machine of the units, and improve the economical efficiency of power plant unit operation.
作者
刘月正
LIU Yuezheng(Shanxi Deyuan Fugu Energy Co.,Ltd.,Fugu 719400,China)
出处
《内蒙古电力技术》
2021年第6期73-77,共5页
Inner Mongolia Electric Power
关键词
火电机组
次同步谐振/振荡
扭振保护
协调控制
疲劳累积
切机
thermal power plant
subsynchronous oscillation/resonance
torsional vibration protection
coordination control
fatigue cumulative
cutting machine
