| 引用本文: | 章勇高,纵楠.一种基于直流输出侧并联解耦的光伏微逆变器优化设计研究[J].电力系统保护与控制,2017,45(5):26-31.[点击复制] |
| ZHANG Yonggao,ZONG Nan.Research on the optimal design of a PV micro-inverter with parallel decoupling circuit on DC side[J].Power System Protection and Control,2017,45(5):26-31[点击复制] |
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| 摘要: |
| 研究一种用于光伏发电的功率解耦微逆变器。该微逆变器由基本的buck-boost电路与电流源型高频逆变电路并联而成，解耦电容并联在两个电路之间。通过峰值电流控制法使解耦电容两端电压升高、纹波加大，降低解耦电容容值，避免使用短寿命的电解电容器，从而达到延长逆变器使用寿命的目的。分析了电路的5个工作状态，设计了相应的电路参数和峰值电流控制策略。用PSIM软件建立了电路仿真模型，进行了仿真实验。仿真结果表明，所提出的方法可以降低解耦电容的大小，延长微逆变器的使用寿命。 |
| 关键词: 微逆变器 buck-boost 功率解耦 PSIM仿真 |
| DOI：10.7667/PSPC161851 |
| 投稿时间：2016-11-07修订日期：2016-12-15 |
| 基金项目:国家自然科学基金项目(51467006);江西省科技厅科技专项(20151BBE50118, 20161BBH80032) |
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| Research on the optimal design of a PV micro-inverter with parallel decoupling circuit on DC side |
| ZHANG Yonggao,ZONG Nan |
| (School of Electronic Engineering, East China Jiaotong University, Nanchang 330013, China) |
| Abstract: |
| This paper researches a power decoupling micro-inverter for photovoltaic power generation. The micro-inverters is composed of the basic buck-boost circuit and the current source from the high-frequency inverter circuit in parallel. Decoupling capacitors are connected in series between the two circuits. It uses peak current control to make the voltage of decoupling capacitor double terminals boost and the ripple increase, decreases decoupling capacitance, and avoids low-lifetime electrolytic condenser so as to prolong inverter's service life. Five working states of the circuit are analyzed. The corresponding circuit parameters and peak current control strategy are designed. Circuit simulation model is built and tested by using PSIM software. Simulation results show that the proposed topology and its control strategy can reduce the decoupling capacitors’ capacitance and prolong the service life of micro-inverter. This work is supported by National Natural Science Foundation of China (No. 51467006) and Science and Technology Industrial Planning Project of Jiangxi Province (No. 20151BBE50118 and No. 20161BBH80032). |
| Key words: micro-inverter buck-boost power decoupling PSIM simulation |
