多馈入直流输电系统中直流调制的协调优化

COORDINATION AND OPTIMIZATION OF HVDC MODULATIONS IN MULTI-INFEED HVDC TRANSMISSION SYSTEM

文章将带参数约束的非线性最优化方法应用于包含多馈入直流输电系统的交/直流互联电力系统,进行各直流调制之间的协调控制研究。研究方法是最小化包含区域间振荡特性的目标函数,同时优化预先选择的多馈入直流输电系统中各直流调制的参数,最终实现各直流系统调制间的优化调节,在最优和全局协调的方式下增强整个系统对交流系统机电振荡的阻尼。并以中国南方电网2005年的规划网络为实例说明了该方法的有效性和鲁棒性。

Here, the non-linear optimization method with parameter constraints is applied to integrated AC/DC hybrid power system in which the multi-infeed DC power transmission system is included, and the research on coordination controls among the HVDC modulations is conducted. The approach for this research is that to minimize the objective function containing the inter-area oscillation characteristics, and at the same time to optimize the parameters of the HVDC modulations in the preselected,multi-infeed DC transmission system, finally, the optimized regulation among the HVDC modulations is implemented, thus under the optimization and global coordination the damping of the whole system to the electromechanical oscillations in the AC system is enhanced. Taking the planned power network in the South Power Grid in 2005 for example, the effectiveness and the robustness of the presented method are verified.