中文摘要：

针对大区电网互联和风电接入互联电力系统后面临不同区域电网间的低频振荡问题,提出一种利用广域测量信号来增强互联电力系统区域间功率振荡阻尼的设计方法。基于自由权矩阵方法表示牛顿–莱布尼茨公式,公式可以由线性矩阵不等式进行求解,可以克服利用固定权矩阵带来的保守性。在利用自由权矩阵方法推导得到的时滞相关稳定性判据基础上,设计了广域时滞状态反馈控制器。结合状态观测理论设计了一种新型广域时滞输出反馈控制器。采用平衡截断技术对原系统和控制器进行降阶,实现了对互联电力系统的广域时滞阻尼控制。基于新英格兰测试系统建立了含风电接入的互联电力系统研究模型。时域仿真表明,所提出的广域时滞阻尼控制器能有效地阻尼系统区间振荡。

英文摘要：

For inter-area low frequency oscillation and large amount of wind power integration in power system,this paper proposed a novel design approach to enhance the damping of inter-area oscillations using wide area measurement signals.This paper expressed the Leibniz-Newton formula based on free-weighting matrices,the formula can be solved by linear matrix inequalities（LMIs）,and it can overcome conservatism brought by fixed weighting matrices.Based on the conclusion derived from the delay-dependent stability criteria using free-weighting matrices,the paper designed a wide-area time-delay state feedback controller.Combined with the theory of state observation,a new wide-area time-delay output feedback controller was designed.Balanced truncation method was used to reduce the orders of the plant and the controller.A simulation model for a inter-area power system with wind farm integrated was built based on New England test power system（NETPS）.The results of time-domain simulation show that the derived wide-area time-delay damping controller can damp inter-area oscillation efficiently.