摘要
提出了一种用于改善交直流混联系统暂态稳定性的非线性控制策略,具体做法是通过建立高压直流输电(HVDC)与发电机组成的综合系统模型,应用最优变目标控制(OVAC)理论推导出了HVDC与发电机励磁的非线性综合控制策略。该控制策略首先驱动系统到达按最大稳定域选择的人工中间稳定平衡点,然后才驱动系统到达期望的稳定平衡点。仿真实验结果表明,该控制策略能够较好地提高交直流互联系统的暂态稳定性。
A nonlinear control strategy to improve the transient stability of AC/DC systems is presented. On the basis of establishing a comprehensive system model constituted by generators and applying the theory of optimal variable aim control (OVAC), a comprehensive nonlinear control strategy for HVDC and generator excitation is deduced. At first, this system is driven by this control strategy to reach the artificial medial equilibrium point which is selected according to maximum stability domain, then the system is driven to the expected equilibrium point. The simulation results show that the transient stability of AC/DC system can be effectively improved by use of the presented control strategy.
出处
《电网技术》
EI
CSCD
北大核心
2004年第14期32-35,共4页
Power System Technology
基金
国家自然科学基金(50377017)
