| 虚拟阻抗的无电压传感器并网逆变器控制 |
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| 引用本文： | 艾永乐,潘智航,杜明珠,李港星.虚拟阻抗的无电压传感器并网逆变器控制[J].重庆大学学报(自然科学版),2022,45(11):80-90. |
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| 作者姓名： | 艾永乐 潘智航 杜明珠 李港星 |
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| 作者单位： | 河南理工大学 电工电子实验中心, 河南 焦作 454150;河南理工大学 电气工程与自动化学院, 河南 焦作 454150 |
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| 基金项目： | 河南省教育厅高等学校重点科研项目(17A470001);河南省科技攻关项目(172102310569)。 |
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| 摘 要： | 接口阻抗可以滤除谐波,但接口阻抗和电压传感器会增加系统的体积、功率损耗以及复杂性。针对上述问题,提出了基于虚拟阻抗的无电压传感器控制方案,来实现逆变器并网。文章对逆变器系统模型和虚拟阻抗的实现原理进行了阐述,提出了一种基于虚拟阻抗的控制方法,以实现无接口阻抗和无交流电压传感器控制,在启动时使用电流传感器同步,为了降低系统的复杂性,只使用虚拟电阻进行自同步的方法。通过将Matlab/simulink仿真和实验对结果进行了对比,验证了这些方法的稳定性和动态特性。
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| 关 键 词： | 并网逆变器 无电压传感器 虚拟阻抗 |
| 收稿时间： | 2021/1/26 0:00:00 |
Control of grid-connected inverter without voltage sensor based on virtual impedance |
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| AI Yongle,PAN Zhihang,DU Mingzhu,LI Gangxing.Control of grid-connected inverter without voltage sensor based on virtual impedance[J].Journal of Chongqing University(Natural Science Edition),2022,45(11):80-90. |
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| Authors: | AI Yongle PAN Zhihang DU Mingzhu LI Gangxing |
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| Institution: | Electrical and Electronic Experiment Center, Henan Polytechnic University, Jiaozuo 454150, Henan, P. R. China;School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454150, Henan, P. R. China |
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| Abstract: | The interface impedance can filter out harmonics, but interface impedance and voltage sensors increase the size, power loss, and complexity of the system. To solve these problems, a virtual impedance-based voltage sensor-free control scheme is proposed to have the inverter grid-connected. The inverter model and the principle of virtual impedance implementation are elaborated, and a virtual impedance-based control method is proposed to achieve interface impedance-free and AC voltage-sensor-free control. In addition, a method is proposed to use current sensor synchronization at startup. To reduce the complexity of the system, only virtual resistors are used for self-synchronization. The stability and dynamic characteristics of the proposed methods were verified by comparing Matlab/simulink simulations with experimental results. |
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| Keywords: | grid-connected inverter voltage-sensor-free virtual impedance |
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