一种基于泰勒展开的临界降阶直流配电系统稳定控制算法

In this paper, a typical medium voltage DC (MVDC) distribution system is taken as the research object, its supercritical reduced-order model is also established, and the effect of constant power load (CPL) on the system stability is also studied. The negative incremental resistance of CPL will lead to the voltage oscillation and instability of the system, which will adversely affect the stable operation of the system. For this reason, a stabilization control method which can improve the voltage stability of MVDC distribution system is proposed in this paper. The position of the dominant pole in the s-domain plane can be changed, which is due to the decentralized and flexible design of key control parameters in state feedback control, droop control and voltage control, and the stability of MVDC distribution system is improved. The simulation results verify the rationality of the supercritical reduced-order model and the effectiveness of the stabilization control method based on Taylor expansion.