A study on the parameter design method based on photovoltaic inverter for flying capacitor Boost circuit

GAN Weiwei; OUYANG Shun; LIU Fei; LIU Quancheng; ZHANG Honghao

doi:10.13890/j.issn.1000-128X.2023.05.020

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A study on the parameter design method based on photovoltaic inverter for flying capacitor Boost circuit

Device Application Technology | 更新时间：2023-10-12

- A study on the parameter design method based on photovoltaic inverter for flying capacitor Boost circuit
- Electric Drive for Locomotives Issue 5, Pages: 177-183(2023)
- 作者机构：
  
  1.湖南大学机械运载学院，湖南长沙 410082
  2.株洲中车时代电气股份有限公司，湖南株洲;412001
- 作者简介：
- 基金信息：
- DOI：10.13890/j.issn.1000-128X.2023.05.020
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GAN Weiwei, OUYANG Shun, LIU Fei, et al. A study on the parameter design method based on photovoltaic inverter for flying capacitor Boost circuit. [J]. Electric Drive for Locomotives (5):177-183(2023)
DOI：

GAN Weiwei, OUYANG Shun, LIU Fei, et al. A study on the parameter design method based on photovoltaic inverter for flying capacitor Boost circuit. [J]. Electric Drive for Locomotives (5):177-183(2023) DOI： 10.13890/j.issn.1000-128X.2023.05.020.

摘要

针对1 500 V电压等级的组串光伏逆变器升压环节，文章开展基于飞跨Boost电路的最优参数计算研究。基于主流光伏电池板的规格要求，确定所设计飞跨Boost电路的输入输出参数。根据飞跨Boost工作原理，首先开展功率半导体模块的选型与校核计算；然后在电路工作极限点分别计算最小输入滤波电感、输入滤波电容和飞跨电容等参数，并提出动态控制策略；最后通过仿真表明基于飞跨Boost主电路参数设计方法的有效性和准确性，为1 500 V电压等级的组串式逆变器提供了一种升压电路的设计方法。

Abstract

This article conducted a research study on the optimal parameter calculation of the boost circuit based on the flying-capacitor for the step-up conversion in series-connected photovoltaic (PV) inverters with a voltage rating of 1 500 V. The input and output parameters of the designed flying-capacitor boost circuit were determined based on the specifications of mainstream PV panels. According to the working principle of the flying-capacitor boost circuit, the selection and verification calculation of power semiconductor modules were carried out. Subsequently, the minimum input filtering inductance, input filtering capacitor, flying capacitor, and other parameters were calculated at the circuit's operating limits. Dynamic control strategies were proposed. Finally, through simulations, the effectiveness and accuracy of the parameter design method for the main circuit based on the flying-capacitor boost circuit were demonstrated. This research study provides a design method for the step-up circuit of series-connected inverters with a voltage rating of 1 500 V.

关键词

参数设计光伏组串飞跨Boost飞跨电容功率半导体模块

Keywords

parameter designphotovoltaic series-connectedflying capacitor boostflying capacitorpower semiconductor module

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