摘要
针对水轮发电机组调速系统模型中水压力波动时间、水启动时间等常见参数的不确定性,采用鲁棒控制中的两种方法设计了水轮发电机组串级鲁棒调速系统。本文以进水阀门伺服电机为第一级系统,采用混合灵敏度设计方法设计获得第一级控制器;以水轮机、同步发电机及第一级系统组成第二级系统,采用μ-综合的方法设计获得第二级控制器。对控制器的控制效果及其抗干扰能力进行了仿真,仿真结果表明该控制器能在有效地调节和控制水轮机转速的同时具有较好的鲁棒性,且其时域性能显著优于比例-微分-积分(PID)调速器和仅采用μ-综合的PI调速器。
Due to the uncertainty of water pressure fluctuation time,start up time and other modeling parameters in the model of hydro turbine governor system,two different robust control methods are used for designing the speed governor of cascaded turbine system with two stages. The servo motor of intake valve is taken as the first-stage system,and the mixed sensitivity method is applied for designing the first-stage controller. The second-stage system consists of a turbine,a synchronous generator and the first-stage system,and its controller is designed by the μ-synthesis method. In the case study,the performance of controllers and its robustness in handling interference are simulated. The results show that the controllers can effectively adjust and control turbine speed while with good robustness,and its time domain performance is significantly better than that of proportional-integral-derivative (PID) governor and μ-synthesis PI governor.
作者
李文武
胡一鸣
游文霞
LI Wenwu;HU Yiming;YOU Wenxia(Hubei Provincial Key Laboratory of Operation and Control of Cascade Hydropower Stations(China Three Gorges University),Yichang 443002,Hubei,China;School of Electrical and Electrical Engineering,China Three Gorges University,Yichang 443002,Hubei,China)
出处
《水力发电》
北大核心
2019年第7期90-93,98,共5页
Water Power
基金
湖北省技术创新专项(重点项目)(2017AAA-132)
关键词
水轮发电机组调速系统
鲁棒控制
串级控制
混合灵敏度
μ-综合
hydro turbine speed governor system
robust control
cascade system control
mixed sensitivity
μ-synthesis
