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Convergence analysis of a least squared algorithm of linear switched identification

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Journal of Control and Decision 2020年第4期7卷 379-396页

作者： Hongwei Wang lirong xie School of Control Science and Engineering Dalian University of TechnologyDalianPeople’s Republic of China School of Electrical Engineering Xinjiang UniversityUrumqiPeople’s Republic of China

A novel identification algorithm is proposed to deal with the modelling issues of linear switched systems under the switching modes being *** main contributions of this paper embody the following aspects:(1)for simplifying the identification problems,the label functions are proposed to replace the switching states of the modes;(2)The recursive least square algorithm is used to identify the system parameters,and the convergence performance of the proposed algorithm is *** using convergence analysis,the parameter estimation error can converge to zero point when the input signals satisfy persistent excited conditions and the total time of mode mismatch is ***,the effectiveness of the proposed method is verified by a simulation example.

关键词： Linear switched systems label functions mode matching convergence analysis

A Fuzzy Hierarchical Strategy for Improving Frequency Regulation of Battery Energy Storage System

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维普期刊数据库

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Journal of Modern Power Systems and Clean Energy 2021年第4期9卷 689-698页

作者： Kaifeng Wang Ying Qiao lirong xie Jiaming Li Zongxiang Lu Huan Yang School of Electrical Engineering Xinjiang UniversityUrumqiChina State Key Laboratory of Control and Simulation of Power Systems Generation Equipments of Electrical Engineering Tsinghua UniversityBeijingChina

Battery energy storage systems(BESSs)can provide instantaneous support for frequency regulation(FR)because of their fast response ***,purely pursuing a better FR effect calls for continually rapid cycles of BESSs,which shortens their lifetime and deteriorates the operational *** coordinate the lifespan savings and the FR effect,this paper presents a control strategy for the FR of BESSs based on fuzzy logic and hierarchical *** fuzzy logic controller improves the effect of FR by adjusting the charging/discharging power of the BESS with a higher response speed and precision based on the area control error(ACE)signal and the change rate of ACE in a non-linear *** controllers effectively reduce the life loss by optimizing the depth of discharge,which ensures that the state of charge(SOC)of BESS is always in the optimal operating range,and the total FR cost is the lowest at this *** proposed method can achieve the optimal balance between ACE reduction and operational economy of *** effectiveness of the proposed strategy is verified in a two-area power system.

关键词： Battery energy storage system(BESS) frequency regulation(FR) coordinated control strategy optimal depth of discharge charging/discharging threshold

New approach to paricalcitol synthesis

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Chinese Science Bulletin 2012年第14期57卷 1616-1619页

作者： LI LiQi YUE lirong xie ZhiXiang LI Ying State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China

Paricalcitol,an analog of vitamin D,is used as a drug for the prevention and treatment of secondary *** this paper,a new strategy for the synthesis of paricalcitol is *** approach includes three main improvements:one-pot regioselective ozonization cleavage of the side-chain and methylene at C-19,free-radical reduction removal of the OH group formed at C-19,and side-chain assembly using a Wittig *** are all new strategies for the synthesis of 19-nor-vitamin D2 compounds.

关键词：醇合成维生素D2 清除自由基反应选择性甲状旁腺继发性亚甲基化合物

笼型异步电动机特性的Matlab/GUI平台设计

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微电机 2014年第4期47卷 71-74页

作者：谢丽蓉新疆大学电气工程学院乌鲁木齐830047

采用Matlab GUI设计对笼型异步电动机特性进行仿真,根据机械特性实用表达式,采用Matlab/Simulink建立笼型异步电动机起动特性模型,仿真结果该电动机不能够起动,而实验测得该电机是能够起动的;而采用修正的机械特性,绘制的机械特性曲线... 详细信息

采用Matlab GUI设计对笼型异步电动机特性进行仿真,根据机械特性实用表达式,采用Matlab/Simulink建立笼型异步电动机起动特性模型,仿真结果该电动机不能够起动,而实验测得该电机是能够起动的;而采用修正的机械特性,绘制的机械特性曲线和起动特性曲线与实验所测曲线较为一致。运用该分析界面,可以方便地实现对电机参数的设置和修改、模型查看和修正、仿真显示及相关辅助操作,极大地简化了仿真的操作过程,提高了仿真的效率。此界面友好、开放,仿真结果即时可见,为笼型异步电动机特性理论分析、教学实验及电机制造厂家,提供了一种简洁而有效的方法。

关键词：笼型异步电机特性曲线 Matlab GUI

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实时发电计划闭环控制模型与应用

电网技术 2014年第11期38卷 3187-3192页

作者：徐帆丁恰谢丽荣张勇国电南瑞科技股份有限公司江苏省南京市210061 江苏省电力公司江苏省南京市210024

针对实时发电计划应用模块上线后,如何与自动发电控制衔接以进一步提高调度运行精益化水平的问题,提出实时发电计划中的机组控制模式及其转换机制,建立了实时发电计划与自动发电闭环控制优化模型。模型根据控制模式的不同将机组分为自... 详细信息

针对实时发电计划应用模块上线后,如何与自动发电控制衔接以进一步提高调度运行精益化水平的问题,提出实时发电计划中的机组控制模式及其转换机制,建立了实时发电计划与自动发电闭环控制优化模型。模型根据控制模式的不同将机组分为自动发电控制机组、缓冲机组和计划机组3类,分别对不同控制模式的机组进行建模,可实现自动发电控制机组与缓冲机组控制模式的动态转换,同时将系统可调容量在不同类型机组间进行动态转移,达到可调容量合理分布的效果。采用IEEE 118节点系统对所提模型进行测试,结果验证了所提模型的可行性与有效性,表明实时发电计划编制时,通过兼顾自动发电控制需求,可以合理地在机组间分配系统可调容量资源,降低自动发电控制的运行压力,实现对控制资源的有效利用。

关键词：实时发电计划自动发电控制动态转移模式转换