| 引用本文: | 王 浩,聂晶莹,李 斌,等.电网电压不平衡下交直流混合微电网互联接口变换器分数阶滑模控制策略[J].电力系统保护与控制,2023,51(16):94-103.[点击复制] |
| WANG Hao,NIE Jingying,LI Bin,et al.Fractional order sliding mode control strategy of AC/DC hybrid microgrid interconnection interface converter under grid voltage imbalance[J].Power System Protection and Control,2023,51(16):94-103[点击复制] |
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| 电网电压不平衡下交直流混合微电网互联接口变换器分数阶滑模控制策略 |
| 王浩1,2,聂晶莹1,李斌1,2,张国澎1,2,韦延方1,2,王晓卫3 |
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| (1.河南理工大学电气工程与自动化学院，河南 焦作 454003;2.河南省煤矿装备智能检测与控制重点实验室，
河南 焦作 454003;3.西安理工大学电气工程学院，陕西 西安 710048) |
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| 摘要: |
| 针对并网型交直流混合微电网交流侧电压不平衡时会产生交流电流负序分量导致直流母线电压二倍频脉动的问题，提出了一种直流侧母线电压分数阶滑模控制以及交流侧负序电流抑制方法。首先，基于同步旋转坐标系下电网电压不平衡时交直流混合微电网互联接口变换器的数学模型，设计电压外环变结构滑模控制器。然后，根据电压不平衡时互联接口变换器的功率传输特性，提取交流侧三相电压的正序分量，得到交流侧负序电流抑制指令。接着，采用分数阶滑模趋近律设计内环电流解耦控制器，并利用李雅普诺夫函数进行稳定性校验。最后，基于Matlab/Simulink搭建的交直流混合微电网模型，验证了所提控制策略相较传统PI控制不仅抑制了三相电流的不平衡，而且将响应速度提升了近50%。 |
| 关键词: 交直流混合微电网 互联接口变换器 电压不平衡 分数阶滑模控制 正负序分离 电压稳定 |
| DOI：10.19783/j.cnki.pspc.230421 |
| 投稿时间：2023-04-17修订日期：2023-06-06 |
| 基金项目:国家自然科学基金项目资助(52177114)；河南省自然科学基金项目资助(212300410147)；河南省科技攻关项目资助(232102240036)；河南省高校基本科研业务费专项资金资助(NSFRF230419)；河南理工大学青年骨干教师资助计划项目 (2022XQG-15) |
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| Fractional order sliding mode control strategy of AC/DC hybrid microgrid interconnection interface converter under grid voltage imbalance |
| WANG Hao1,2,NIE Jingying1,LI Bin1,2,ZHANG Guopeng1,2,WEI Yanfang1,2,WANG Xiaowei3 |
| (1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003, China; 2. Henan
Key Laboratory of Intelligent Direction and Control of Coal Mine Equipment, Jiaozuo 454003, China;
3. School of Electrical Engineering, Xi’an University of Technology, Xi’an 710048, China) |
| Abstract: |
| Aiming at the problem that the negative sequence component of AC current is generated when the AC side voltage is unbalanced in grid-connected AC-DC hybrid microgrid, which leads to the double frequency fluctuation of DC bus voltage, a fractional order sliding mode control method of DC bus voltage and negative sequence current suppression method of AC side are proposed. First, based on the mathematical model of AC-DC hybrid microgrid interconnecting interface converter when the grid voltage is unbalanced in synchronous rotating coordinate system, the outer voltage loop variable structure sliding mode controller is designed. Then, according to the power transmission characteristics of the interconnected interface converter when the voltage is unbalanced, the positive sequence component of the three-phase voltage on the AC side is extracted, and the negative sequence current suppression command on the AC side is obtained. Next, the fractional order sliding mode reaching law is used to design the inner loop current decoupling controller, and the Lyapunov function is used to verify the stability. Finally, the AC/DC hybrid microgrid model built on Matlab/Simulink verifies that compared with the traditional PI control, the proposed control strategy not only restrains the three-phase current imbalance, but also improves the response speed by nearly 50%. |
| Key words: AC/DC hybrid microgrid interconnect interface converter voltage imbalance fractional order sliding mode control positive and negative sequence separation voltage stability |
