非隔离光伏并网逆变系统的地电流分析与验证

SU Na; XU Dehong

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非隔离光伏并网逆变系统的地电流分析与验证

更新时间：2025-08-13

- 非隔离光伏并网逆变系统的地电流分析与验证
- Automation of Electric Power Systems Vol. 36, Issue 12, Pages: 30-35(2012)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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SU Na, XU Dehong. [J]. Automation of electric power systems, 2012, 36(12): 30-35.
DOI：

SU Na, XU Dehong. [J]. Automation of electric power systems, 2012, 36(12): 30-35. DOI：

摘要

分析了非隔离光伏并网逆变系统的地电流大小。介绍了包括单级结构的传统三相逆变器和三相半桥逆变器，以及两级结构的带2电平升压变换器的三相逆变器和带3电平升压变换器的三相逆变器。建立了地电流解析计算方法，给出了各种拓扑的共模简化模型及地电流的傅里叶表达式，以及参数变化对地电流的影响。分析了不同前级升压拓扑对地电流的影响，进行了仿真和实验。

Abstract

The ground current for grid connected transformerless photovoltaic inverter system is analyzed. For the single-stage structure， the traditional three-phase inverter and the three-phase half-bridge inverter with split capacitor are discussed. For the two-stage structure， the two-level boost converter plus three-phase inverter and the three-level boost converter plus three-phase inverter are discussed. The calculation method to estimate the ground current is established. The common-mode models and the Fourier equations of the ground current are given. And the effect of different parameters on the ground current is proposed. The influence of different front-end boost converters on the ground current is analyzed. The simulation and experiment results are given to verify it.

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