基于多级无变压器光伏逆变器的单相系统实功率和无功功率注入

2020 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER) Pub Date : 2020-10-30 DOI:10.1109/DISCOVER50404.2020.9278123

Bhagyashree Karur, Sanjeevkumar R A

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引用次数: 3

摘要

并网光伏(PV)逆变器用于产生并向电网注入实际电力。并网光伏逆变器的主要问题是在阴云条件下，由于最大功率点跟踪(MPPT)导致直流链路电压振荡而导致的效率和谐波含量。在本文中，我们采用无变压器的光伏逆变器，以使其尺寸和成本以及损耗最小化。针对这种新型无变压器多电平逆变器，本文提出了7电平8开关逆变器。该逆变器提供零共模漏电流，也能够注入实功率和无功功率。在MATLAB/Simulink软件中对所提出的7级逆变器拓扑进行仿真，确定其最大功率点跟踪性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Multi-level Transformerless PV inverter Based Real and Reactive Power Injection for Single Phase System

The grid connected Photovoltaic (PV) inverters are used to generate and inject real power to the grid. The main concerns of grid connected PV inverters are efficiency and harmonic contents due to oscillations in dc link voltage due to Maximum Power Point Tracking (MPPT) under clouded conditions. In this paper, we are using transformerless PV inverter, so that the size and cost as well as the losses can be minimized. For this new transformerless multilevel inverter is proposed in this paper with seven levels with eight switches. This inverter provides zero common mode leakage current and also capable of injecting both real and reactive power. Simulation work is carried out for seven level proposed inverter topologies in MATLAB/Simulink software which determines its maximum power point tracking performance.

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来源期刊

2020 IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits and Robotics (DISCOVER)

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