带速度下降特性的非线性汽门控制器

Firstly, present various kinds of nonlinear governor controllers are analyzed in the paper. They all can not consider the speed-droop characteristic of practical governors, and should know system’s post-disturbance operating point in the process of control. Then, different from selecting single variable (such as rotor angle or rotor speed) as control output in normal nonlinear governor control methods, a combined output, or the linear combination of rotor speed and mechanical power, is chosen in the paper, and then the nonlinear governor controller is designed based on this combined output. Under the control of the proposed nonlinear governor controller, there will be a definite proportion relation between the differences of the rotor speed and the mechanical power with their initial values. Furthermore, this proportion is assigned as the speed-droop, and thus the proposed controller can reflect the speed-droop characteristic. Meanwhile, it does not need to know system’s post-disturbance operating point in the process of control for the proposed controller. Finally, the simulation results of a multi-machine system based on PSASP also demonstrate that the proposed controller can not only consider the speed-droop characteristic like the conventional one, but also achieve better dynamic control performance than the conventional one.