论文部分内容阅读
以统一潮流控制器 ( UPFC)为研究对象 ,针对其调制控制 ,引入模糊技术 ,设计了模糊调制控制器 ,以抑制互联电力系统联络线功率振荡 ,改善系统的动态稳定性。给出了模糊调制控制器的结构 ,运用梯度下降法对模糊控制器的关键参数进行了优化。结合 UPFC具有串、并联元件的特点 ,提出了模糊联合调制控制器 ,相对于单一元件调制控制 ,可更有效地阻尼功率振荡。多机系统仿真结果表明模糊调制控制器能有效地抑制振荡 ,并且在运行工况改变时性能优于线性调制控制器 ,而联合调制又优于单一元件调制
Taking uniform power flow controller (UPFC) as the research object, aiming at its modulation control, fuzzy control technology is introduced and a fuzzy modulation controller is designed to suppress the power oscillation in the tie line of interconnected power system and improve the dynamic stability of the system. The structure of fuzzy controller is given. The key parameters of fuzzy controller are optimized by gradient descent method. Combined with the characteristics of UPFC with string and parallel elements, a fuzzy joint modulation controller is proposed, which can dampen power oscillation more effectively than single-element modulation control. Multi-machine system simulation results show that the fuzzy modulation controller can effectively suppress the oscillation, and its performance is better than the linear modulation controller when the operating conditions change, and the joint modulation is better than the single element modulation