摘要
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。
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.
出处
《电工技术学报》
EI
CSCD
北大核心
2006年第6期106-110,共5页
Transactions of China Electrotechnical Society
基金
国家重点基础研究专项经费资助项目(G1998020309)。
关键词
最优变目标控制
非线性控制
故障后平衡点
解耦观测
暂态稳定
Optimal variable-aim control, nonlinear control, post-fault equilibrium point, decoupied observation, transient stability
