带电压调节功能的非线性鲁棒控制器

摘要

提出了一种既可增加多机电力系统暂态稳定性又可达到机端输出电压调节功能的非线性鲁棒控制器。该控制器由一个直接反馈线性化（DFL）控制器和一个比例积分（PI）控制器组成。DFL控制器用于降低多机电力系统的非线性程度以及各机之间的相互作用。所提控制器设计方法既可保证系统稳定性又可达到调节电压的目的，同时在实现时不需要测量发电机功角。仿真结果表明，所提出的方案可在很宽的运行范围内增加系统的阻尼及稳定性。%A robust nonlinear controller for improving multi-machine power system transient stability as well as achieving voltage regulation is presented in this paper. The controller is a direct feedback linearization (DFL) controller with a PI type voltage servo compensator. The DFL controller is used to alleviate the nonlinearities and interconnections in multi-machine power systems. A design method is proposed to guarantee the stability of the whole system and achieve voltage regulation simultaneously. Using the proposed approach, measurement of power angle is not necessary for implementing the decentralized nonlinear controller. Simulation results of the proposed scheme on example systems show that the damping and stability of the system are improved in a large operating region.