摘要
针对大扰动情形,为进一步提高交直流混合电力系统的暂态稳定性,提出了一种高压直流输电(HVDC)与发电机励磁协调的控制方法。通过建立HVDC系统与发电机的综合模型,将现代控制理论中直接反馈线性化方法与线性系统最优控制理论相结合,设计出一种HVDC与发电机励磁协调的非线性最优控制规律。仿真结果表明,该协调控制器能明显提高交直流互联系统的功角稳定性和频率稳定性,改善直流系统的性能。
A coordinated control of HVDC and generator excitation to improve transient stability of AC/DC systems in the presence of large disturbance is presented in this paper. First, a model including HVDC and generator excitation is developed. Then, based on the direct feedback linearization method of nonlinear systems and the optimal control theory of linear systems, a rule of nonlinear optimal coordinated control for HVDC and generator excitation is derived. The simulation results of a single machine infinite bus system show that the proposed method can improve not only the power angle and the frequency stability of AC/DC systems, but also the performance of DC systems.This project is supported by National Natural Science Foundation of China(No.50377017).
出处
《继电器》
CSCD
北大核心
2004年第20期1-4,共4页
Relay
基金
国家自然科学基金资助项目(50377017)
