多机电力系统发电机励磁与调速器的最优变目标非线性控制的研究

提出了一种新的考虑故障后发电机输入机械功率变化的平衡点解耦观测方法,及发电机组励磁和调速协调的最优变目标非线性控制策略.它们仅利用发电机组的就地信息,实现了分散观测与控制,便于工程应用.对一个3机9节点系统的仿真结果表明,新的故障后平衡点解耦观测方法对网络结构和故障类型具有自适应能力,总是能够快速搜索并引导变目标非线性控制系统很快地收敛于最近的平衡点,提高了系统暂态稳定性,改善了系统的动态品质.

Coordinated Optimal Variable-Aim Nonlinear Control Strategy of Generator Excitation and Governor

A coordinated optimal variable-aim nonlinear control strategy of the generator excitation and governor, and a novel decoupled observation approach of the post-fault equilibrium point considering generator mechanical input change, are proposed in this paper. Only the local information of the generator unit are needed in this observation approach, and the control strategy which makes the decoupled nonlinear control is feasible and practical. Simulation results on a 3-machine 9-node power system show that the proposed decoupled observation method of the post-fault equilibrium point has adaptive ability to different network and disturbance type and can always search and guide the power system with the optimal variable-aim controller to converge to the nearest post-fault equilibrium point, and improve the transient stability and can dynamic performance of the whole power system to a great extent.