| 引用本文: | 程俊,李媛,肖先勇.单相储能型准Z源逆变器的建模与系统参数设计方法[J].电力系统保护与控制,2020,48(12):128-136.[点击复制] |
| CHENG Jun,LI Yuan,XIAO Xianyong.Modeling and system parameter design method for single-phase energy-stored quasi-Z-source inverter[J].Power System Protection and Control,2020,48(12):128-136[点击复制] |
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| 摘要: |
| 单相储能型准Z源逆变器(ES-qZSI)不仅能够在单级系统中同时实现升压和逆变的功能，而且能够平抑光伏输入功率的波动，但其直流侧存在二倍频纹波，这极大地影响了其性能。为了将二倍频纹波限制在允许的范围内，需要对系统参数进行优化。首先，基于状态空间平均法求二阶导数建立了含储能支路的单相ES-qZSI的二倍频分量模型。然后，依据建立的模型分析了各系统参数值对二倍频纹波的影响。最后，提出了抑制二倍频纹波的系统参数设计方法。仿真和实验结果证实了模型的准确性和系统参数设计方法的有效性。 |
| 关键词: 储能型准Z源逆变器 二倍频纹波 模型 参数设计 光伏 |
| DOI：10.19783/j.cnki.pspc.190922 |
| 投稿时间：2019-07-30修订日期：2019-09-28 |
| 基金项目:国家自然科学基金项目资助(51707126);国家电网科技项目资助(SGLNDK00DWJS1800020) |
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| Modeling and system parameter design method for single-phase energy-stored quasi-Z-source inverter |
| CHENG Jun,LI Yuan,XIAO Xianyong |
| (School of Electrical Engineering, Sichuan University, Chengdu 610065, China) |
| Abstract: |
| A single-phase energy-stored quasi-Z-source inverter (ES-qZSI) can not only realize the function of boosting and inversion in a single stage, but can also smooth the fluctuation of photovoltaic power. However, it has second harmonic ripples on the DC side, which greatly affects performance. In order to limit the second harmonic ripples to an allowable range, system parameters need to be optimized. First, based on the state-space average model and the second order derivative, a detailed second harmonic component model is established for a single-phase qZSI with energy storage branch. Then, based on the built model, the influence of system parameters on the second harmonic ripple is analyzed. Finally, a system parameter design method used for second harmonic ripple suppression is proposed. The accuracy of the built model and the efficiency of the system parameter design method are verified by simulation and experiment. This work is supported by National Natural Science Foundation of China (No. 51707126) and Science and Technology Project of State Grid Corporation of China (No. SGLNDK00DWJS1800020). |
| Key words: energy-stored quasi-Z-source inverter second harmonic ripple model parameter design photovoltaic |
