电力系统紧急支持配合控制颤振抑制方法

Emergency support cooperative control and vibration attenuation of a power system

为抑制时间最优Bang-Bang控制的颤振和冲击现象在电力系统紧急控制中造成的不利影响,通过设置缓冲"回滞带",并设计了一种连续切换算法。基于该算法,结合逆系统方法,对包含静止无功补偿器的非仿射非线性电力系统模型反馈线性化,设计了时间最优紧急支持配合控制器。并在单机无穷大系统中发生初值扰动及三相短路两种故障时对该控制器进行了仿真验证。仿真结果表明:该紧急支持配合控制律对于解决"颤振"问题提供了一种新的研究途径,可以减弱控制律切换时对系统的冲击影响,同时达到了时间最优的效果,因此具有潜在的重要参考价值。

A continuous switching control algorithm in a buffer region on one side of the switch line was developed to attenuate the chatter and impact resulting from bang-bang switching time optimal control. A feedback controller was then developed for a non-affine nonlinear model of power systems including a static vat compensator （SVC） using the inverse system method. The controller was a time optimized emergency support cooperative control strategy. The control strategy was simulated in a single machine infinite bus system with initial errors and three-phase short circuit faults. The simulation results show that the control strategy can. eliminate chattering in a closed system and effectively reduce the impact during the switching of control laws, thus achieving the time optimized response and verifying the potential practical value of the control algorithm.