什么是发电机的飞轮力矩，它在电气上有什么意义 What is the flywheel torque of a generator and what is its electrical significance

发电机飞轮力矩，是发电机转动部分的重量与其惯性直径平方的乘积。看起来它是一个与电气参数无关的量，其实不然，它对电力系统的暂态过程和动态稳定影响很大。它直接影响到在各种工况下突然甩负荷时机组的速率上升及输水系统的压力上升，它首先应满足输水系统调节保证计算的要求。

当电力系统发生故障，发电机组负荷突变时，因调速机构的时滞，使机组转速升高，为限制转速，机组需一定量的飞轮力矩，越大，机组转速变化率越小，电力系统的稳定性就越好。与机组造价密切相关，飞轮力矩越大，机组重量越大，制造成本越大。

The flywheel torque of a generator is the product of the weight of the rotating part of the generator and the square of its inertia diameter. It may seem like a quantity unrelated to electrical parameters, but in fact, it has a significant impact on the transient processes and dynamic stability of the power system. It directly affects the rate increase of the unit and the pressure increase of the water delivery system when suddenly shedding load under various working conditions. It should first meet the requirements of the water delivery system regulation and guarantee calculation.

When the power system malfunctions and the unit load suddenly changes, the speed of the unit increases due to the time delay of the speed control mechanism. To limit the speed, the unit requires a certain amount of flywheel torque. The larger the torque, the smaller the rate of change in unit speed, and the better the stability of the power system. Closely related to the cost of the unit, the greater the flywheel torque, the heavier the unit, and the higher the manufacturing cost.