理想电网条件下可再生能源发电三电平并网逆变器

WANG Chong; XING Yan; FANG Yu; HAO Feiqin; MA Yundong

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理想电网条件下可再生能源发电三电平并网逆变器

更新时间：2025-08-13

- 理想电网条件下可再生能源发电三电平并网逆变器
- Automation of Electric Power Systems Vol. 34, Issue 3, Pages: 58-62(2010)
- 作者机构：
  
  南京航空航天大学航空电源重点实验室,江苏省,南京市,210016
- 作者简介：
- 基金信息：
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- Published：2010
- 稿件说明：
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WANG Chong, XING Yan, FANG Yu, et al. [J]. Automation of electric power systems, 2010, 34(3): 58-62.
DOI：

WANG Chong, XING Yan, FANG Yu, et al. [J]. Automation of electric power systems, 2010, 34(3): 58-62. DOI：

摘要

在可再生能源发电系统中，并网逆变器是实现电能馈送电网的重要环节。文中研究了二极管钳位型三电平逆变器及其并网运行控制策略。建立了并网逆变器在两相同步旋转坐标系下的数学模型;分析了并网模式下电压、电流的矢量关系;采用基于d-q坐标系的矢量控制策略及并网电流跟踪控制，实现了以单位功率因数馈送电能;分析了逆变器直流侧电容不均压的原因，提出了一种基于模糊控制的中点均压策略。仿真和实验结果验证了其有效性。

Abstract

Inverter plays an important role for energy conversion and transmission in grid connected renewable power generation systems. The diode-clamped three-level inverter and its control under grid connected operation mode are studied. The math model of inverter is built in the two-phase synchronously rotating reference frame， and the vector relationship between voltage and current of the model under grid connected operation mode are analyzed. The vector control in d-q rotating reference frame and tracing control of grid current is adopted to achieve unit power factor for power transmission. The voltage unbalance of capacitor-leg in DC link of the inverter is analyzed in detail and a novel neutral point voltage balancing strategy based on fuzzy control is proposed. Simulation and experimental results verify the validity of the analysis and design.

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