发电机非线性最优协调控制研究  

Nonlinear optimal coordination controller for generator unit

作　　者：林丽君[1] 白阳振 刘彦华[3] 

机构地区：[1]浙江省电力设计院,浙江杭州310012 [2]中国联合工程公司,浙江杭州310022 [3]华北电力大学控制与计算机工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2013年第6期57-62,共6页Journal of North China Electric Power University：Natural Science Edition

摘　　要：励磁控制系统有利于提高输电系统的微动态稳定性及改善动态品质,但效果受限于强行励磁顶值倍数与励磁电流上升速度。研究表明,快速汽门调速控制能够克服励磁控制的不足。针对汽轮发电机组多输入多输出非线性控制系统提出了发电机励磁与汽门协调非线性最优控制器,其将非线性控制系统的全部控制目标转换到线性空间中,在性能指标中约束全部控制目标,因而推导的控制律包含所有控制目标的反馈信息。仿真结果表明:在该控制律的作用下发电机具有良好的电压与汽门调节特性,能够大幅度提高系统静态稳定性,改善系统的动态响应,有效抑制低频振荡,具有良好的抗干扰性。Excitation control system has a significant effect for improving the microdynamic stability and dynamic sta bility of transmission system, but it is limited by rise velocity of excitation current and top value multiple of excitation force. Studies have shown that fast valve control can overcome the shortage of excitation control. In this paper, a non linear optimal coordination controller of excitation control and valve is proposed for multipleinput turbogenerator sys tem. According to the design scheme, all control targets of the nonlinear control system are transformed into the linear space, and punished by the performance index. Thus it includes the feedback information of all control targets. Simula tion results show that there is perfect harmony between voltage generator and valve adjustment features that has the abil ity to improve the system static stability greatly, further to improve the dynamic response of the system, suppressing lowfrequency oscillations effectively.

关 键 词：励磁控制 汽门控制 非线性最优 协调控制 

分 类 号：TM762[电气工程—电力系统及自动化]