直流功率控制的交直流混联系统的频率快速无差调节

Fast and Isochronous Control of Frequency Oscillations Using a Power Modulation Control of the AC/DC Interconnected Power System

该文提出了一种基于李雅普诺夫稳定性理论的多区域交直流混联系统的直流功率控制器设计方法。针对多区域负荷的扰动,首先利用交叠分解技术法将系统分解,然后通过构造合适的李雅普诺夫函数,设计出直流功率控制的控制方案。该控制方案实现简单,不需要设置太多的控制参数,能快速地将系统频率控制到稳定状态。对含有该直流功率控制器的交直流混联系统进行仿真。结果表明,在系统负荷发生扰动时,该直流功率控制器能快速地传输直流功率以补充或吸收系统的功率缺额或功率过剩,实现系统频率的快速稳定与无差调节。

A design method based on Lyapunov stability theory for HVDC power controller is presented for AC/DC interconnected multi-area power system in this paper. For the multi-area load disturbance,at first,the AC/DC hybrid system is divided into two independent subsystems by adopting overlap decomposition. Then by constructing appropri- ate Lyapunov function,the control law for HVDC power controller is established. This controller is simple,without the need to set too much control parameters,and can quickly control the system frequency to a steady state. Simulation experiments are conducted for the purpose of applying the HVDC power controller under the condition of load distur- bance. Result shows that the surplus or shortage of power in an AC area could be absorbed or compensated rapidly by its connected HVDC power control,achieving fast and stable system frequency and non differential regulation.