摘要
由于可再生能源发电系统固有的不确定性以及日益扩大的电网规模和区域内电站结构的复杂度对电力系统稳定运行造成影响。抽水蓄能电站作为一种调频资源,已成为区域电网负荷频率控制(load frequency control,LFC)的重要手段之一。由此,开展了抽水蓄能电站的区域LFC研究,搭建了考虑死区和发电速度约束等非线性因素下的两区域再热式汽轮机组LFC模型,设计了一个分数阶PID(fractional order PID,FOPID)控制器,利用改进Oustaloup算法实现分数阶微分算子的近似并与传统的PID控制器进行比较。仿真结果表明,文中提出的FOPID策略在控制含有非线性环节的系统时能达到更好的控制效果,表现出较强的鲁棒稳定性。对于抽水蓄能电站参与的负荷频率控制,能够缩短频率恢复时间,使二次调频的动态性能得到很大提升。
Due to inherent uncertainty of renewable power generation system, the increasing size of power grid and complexity of power station structure in a region have impact on stable operation of power system. As a frequency regulation resource, pumped storage power station is one of the important means of load frequency control(LFC) in regional power grid. This paper carried out a research on regional LFC of pumped storage power station, and built an LFC model of two-area reheat steam turbine considering dead zone, generation rate constrains and other nonlinear factors. A fractional order PID(FOPID) controller was designed,and improved Oustaloup algorithm was used to approximate fractional differential operator and compare it with traditional PID controller. Simulation results show that the FOPID strategy proposed in this paper could achieve better control effects and exhibit strong robust stability when controlling the system with nonlinear links. For the LFC of pumped storage power station, frequency recovery time was shortened and the dynamic performance of secondary frequency regulation was greatly improved.
作者
单华
和婧
范立新
高从闯
梅睿
骆钊
SHAN Hua;HE Jing;FAN Lixin;GAO Congchuang;MEI Rui;LUO Zhao(Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211102,Jiangsu Province,China;Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan Province,China;Jiangsu Guoxin Liyang Pumped Storage Power Generating Co.,Ltd.,Liyang 213334,Jiangsu Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2020年第4期1410-1418,共9页
Power System Technology
基金
国家自然科学基金资助项目(51907084)
江苏方天电力技术有限公司科技项目(OFW-18677-DJ)
昆明理工大学引进人才科研启动基金项目(KKSY201704027)。
