潮流发电系统的无源控制与输出功率优化  

Passivity-based Control and Output Power Optimization of Tidal Current Power Generation System

作　　者：党萌 张巧杰[1] DANG Meng;ZHANG Qiaojie(School of Automation,Beijing Information Science and Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学自动化学院,北京100192

出　　处：《电力系统及其自动化学报》2021年第7期66-72,共7页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51777012)。

摘　　要：针对潮流流速时变性导致潮流发电输出功率波动的问题,提出基于自适应转矩辨识的永磁同步发电机无源控制策略,来实现潮流发电系统输出功率的优化。首先,借助流体力学软件建立直驱式水轮机网格模型,分析叶轮效率特性得到叶轮最佳转速跟踪目标。其次,借助自适应算法实时辨识叶轮获得转矩波动,与转速误差共同构建误差状态矩阵,以叶轮最佳转速为控制目标得到无源控制律,以期达到获取输出功率最大。最后,建立MATLB/SIMULINK仿真模型并进行了控制算法研究。仿真结果表明,所提出的无源控制策略可以有效提高潮流发电系统输出功率。To solve the problem of output power fluctuations in tidal current power generation caused by the temporal variability of tidal current rate,a passivity-based control strategy for a permanent magnet synchronous generator(PMSG)based on adaptive torque identification is proposed to optimize the output power from a tidal current power generation system.First,a grid model of direct-drive hydraulic turbine is established by means of a fluid mechanics software,and the efficiency characteristics of an impeller are analyzed to obtain its optimal rotational speed to track the target.Second,an adaptive algorithm is used to identify the torque fluctuations of the impeller in real time,with which an error state matrix is constructed together with the rotational speed error.A passivity-based control law is obtained with the impeller’s optimal rotational speed as the control target,which is expected to realize a maximum output power.Finally,a MATLB/SIMULINK simulation model is established,and the corresponding control algorithm is studied.Simulation results show that the proposed passivity-based control strategy can effectively improve the output power from the tidal current power generation system.

关 键 词：潮流发电 最佳转速 永磁同步发电机 无源控制 输出功率最大 

分 类 号：TM7[电气工程—电力系统及自动化]