基于DEA-FLC的异构微源孤岛微电网频率稳定策略  

Frequency Stability Strategy for Islanded Microgrid with Heterogeneous Micro-source Based on DEA-FLC

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作  者:陈潇涵 兰征 王海晖 CHEN Xiaohan;LAN Zheng;WANG Haihui(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China)

机构地区:[1]湖南工业大学电气与信息工程学院,湖南株洲412007

出  处:《电力科学与工程》2024年第11期25-34,共10页Electric Power Science and Engineering

基  金:湖南省教育厅优秀青年项目(22B0603)。

摘  要:当负载大规模投切时,构网型变流器与微电网中传统同步电机(Synchronous generator,SG)在结构、参数上存在的差异会导致由二者构成的异构微源系统运行时发生剧烈的频率波动。针对这一问题,首先选取以虚拟同步发电机(Virtual synchronous generator,VSG)为代表的构网型变流器与SG组成VSG-SG异构微源系统并进行建模,分析VSG模型参数对系统频率稳定性的影响;然后,通过差分进化算法(Differential evolution algorithm,DEA)对模糊控制(Fuzzy logic control,FLC)进行控制参数优化,提出一种基于DEA-FLC的VSG参数自适应调节策略,实现转动惯量和阻尼系数动态调节,提高异构微源系统频率稳定性;最后,通过MATLAB/Simulink仿真验证了本文所提策略的正确性和有效性。When the load is switched on a large scale,the differences in structure and parameters between the grid-form inverter and the traditional synchronous generator(SG)in the microgrid will lead to dramatic frequency fluctuations in the operation of the heterogeneous micro-source system formed by the two.To address this problem,Firstly,the grid-form inverter represented by virtual synchronous generator(VSG)and SG are selected to form a VSG-SG heterogeneous micro-source system and modeled to analyze the influence of VSG model parameters on the frequency stability of the system.Then,the control parameters of fuzzy logic control(FLC)are optimized by differential evolution algorithm(DEA),and an adaptive adjustment strategy of VSG parameters based on DEA-FLC is proposed to realize dynamic adjustment of rotational inertia and damping coefficient to improve the frequency stability of heterogeneous micro-source system.Finally,the correctness and effectiveness of the proposed strategy is verified in the MATLAB/Simulink simulation.

关 键 词:异构微源 同步发电机 虚拟同步发电机 频率稳定性 模糊控制 差分进化算法 

分 类 号:TM721[电气工程—电力系统及自动化]

 

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