300MW汽轮发电机组轴系扭振机电耦合冲击响应的模拟研究

大型汽轮发电机组轴系扭振是发电机机械系统与电网系统相互耦合作用的结果。由于电网负荷变化的随机性，突发性及多样性，机组承受的扭振冲击载荷及其响应特性十分复杂。本文采用弹性连续体振动波动方程的解析方法，分析了300MW汽轮发电机组的扭振响应特性，并针对几种典型的外部激励，对网机耦合作用下机组轴系的扭振强迫振动进行了计算机模拟考核。

SIMULATION RESEARCH ON THE TORSIONAL VIBRATION TO THE MECHANICAL - ELECTRICAL COUPLING IMPULSE IN A 300 MW TURBO - GENERATOR ROTOR SHAFT SYSTEM

The torsional vibration of the large scale turbo -generator shaft system is the responsive result of the mechanical-electrical coupling. Because the transformation of electric net load is very complex, the impulse response on the generator shaft system is stochastic, paroxysmal and multi formed. Based on several typical outer powers actions, the response characteristic of torsional vibration of a 300 MW turbo-generator is simulated by solving the vibration wave equation of the continuous mass system. The forced torsional vibration of the turbo-generator shaft system is examined under the different operational condition of the system.