CAJ | 학술논문

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.
침대교직류상호작용인발적저빈진탕모태적억제문제,제출료일충기우단회직류대계통공솔진탕령민도이론적공제민감점알굴기술.해기술적관건보취재우응용Prony변식기술득도계통관건진탕모태,이급채용TLS-ESPRIT산법사선출삼여인자교대적발전궤조,종이능구통과검측불동직류조제하각모태강상관궤조적전속변화,조도대계통관건진탕모태조절효과최유효적일회직류선로.이일개다낙점계통위실례,설계소방식공제모괴험증료해방법적유효성.
@@@@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. @@@@This work is supported by National Natural Science Foundation of China (No. 51037003) and National High-tech R & D Program of China (863 Program) (No. 2011AA05A119).