基于现今值观测器的混合微网直流母线电压控制研究  

Research on DC bus voltage control technology of hybrid microgrid based on present value observer

作　　者：张晓辉[1] 赵转 Zhang Xiaohui;Zhao Zhuan(The Engineering Technology Research Center For Electric Power Energy-saving and Emission-reducing of Henan Province University,Zhengzhou Electric Power College,Zhengzhou 450000,China)

机构地区：[1]河南省高校电力节能减排工程技术研究中心郑州电力高等专科学校

出　　处：《可再生能源》2019年第11期1666-1670,共5页Renewable Energy Resources

基　　金：2019年度河南省重点研发与推广专项(科技攻关)项目(192102210307)

摘　　要：文章针对混合微电网直流母线电压控制技术开展了研究。首先,建立了用于控制直流母线电压的双向DC/AC数学模型,并以稳定直流母线电压为目标,进行了带有电流前馈的控制系统设计。为了解决系统中直流母线负载电流测量难度较大的问题,基于现今观测器提出了一种负载电流的估计方法。最后,通过仿真验证了所提方法的有效性。In this paper, the DC bus voltage control technology of hybrid microgrid is studied.Firstly, a bidirectional DC/AC mathematical model for controlling DC bus voltage is established,and the control system is designed. Aiming at the shortcomings of traditional double-closed-loop voltage and current control in suppressing bus voltage fluctuation, the feedforward link of power load current is increased. Aiming at the problem that the load current of DC bus is not easy to measure, a virtual measurement method of load current based on current value observer is proposed. Finally, the effectiveness of the above method is verified by simulation.

关 键 词：直流母线控制策略 现今观测器 负载电流前馈 

分 类 号：TK02[动力工程及工程热物理]