直流多落点系统控制敏感点挖掘技术研究  

Study on digging the most sensitive control point of multi-terminal HVDC system

作　　者：郭利娜[1] 刘天琪[1] 程道卫[2] 李兴源[1] 吴霞[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]合肥供电公司,安徽合肥230022

出　　处：《电力系统保护与控制》2013年第10期7-12,共6页Power System Protection and Control

基　　金：国家自然科学基金项目(51037003);863计划(2011AA05A119)~~

摘　　要：针对交直流相互作用引发的低频振荡模态的抑制问题,提出了一种基于单回直流对系统功率振荡灵敏度理论的控制敏感点挖掘技术。该技术的关键步骤在于应用Prony辨识技术得到系统关键振荡模态,以及采用TLS-ESPRIT算法筛选出参与因子较大的发电机组,从而能够通过检测不同直流调制下各模态强相关机组的转速变化,找到对系统关键振荡模态调节效果最有效的一回直流线路。以一个多落点系统为实例,设计小方式控制模块验证了该方法的有效性。In order to suppress the low frequency oscillation caused by the interaction of AC and DC system, a strategy based on sensitivity theory of single HVDC system is proposed. The key point of this strategy is using Prony algorithm to identify the critical oscillation modes and applying TLS-ESPRIT algorithm to choose the generator with high participation of system＇s critical oscillation modes. By testing the rotor speed change of the important generator under different DC modulation, the most efficient DC line in damping critical oscillation mode can be found out. Simulation with small mode DC modulation controller for a multi-terminal HVDC system shows its effectiveness.

关 键 词：多落点 低频振荡 控制敏感点 PRONY辨识 小方式调制 

分 类 号：TM76[电气工程—电力系统及自动化]