A double stage micro-inverter for optimal power flow control in grid connected PV system

2018 International Conference on Information and Communications Technology (ICOIACT) Pub Date : 2018-03-01 DOI:10.1109/ICOIACT.2018.8350788

F. Ronilaya, Achsanul Khabib, M. N. Hidayat, Indrazno Siradjudin, E. Rohadi, Rosa Andri Asmara, E. Yudaningtyas

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引用次数: 6

Abstract

This paper presents a double-stage micro-inverter with an isolated Sepic converter used for optimal power flow control in a small grid connected PV system. The proposed micro-inverter has two stages. Stage I is a DC-DC converter with isolated Sepic transformer and stage II is a DC-AC converter based on voltage source inverter. The main features of the proposed inverter include: high efficiency, small dimension, low cost, lightweight, and a stable AC current injection. Three controllers used comprise non-MPPT (Maximum Power Point Tracker), Constant Voltage (CV), Perturb & Observe (P&O), and Incremental Conductance (IC). To validate the effectiveness of the design, such methods are examined under different irradiance. The results show that the designed micro-inverter controlled by IC MPPT method has satisfactory performance and the efficiency is relatively higher than that of non-MPPT, CV or P&O method. Thus, it can be used as an alternative solution of micro-inverter topology.

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并网光伏系统中最优潮流控制的双级微型逆变器

本文提出了一种带隔离式Sepic变换器的双级微型逆变器，用于小型并网光伏系统的最优潮流控制。所提出的微型逆变器分为两级。第一级是带隔离Sepic变压器的DC-DC变换器，第二级是基于电压源逆变器的DC-AC变换器。该逆变器的主要特点是:效率高、体积小、成本低、重量轻、注入交流电流稳定。使用的三种控制器包括非mppt(最大功率点跟踪器)，恒压(CV)，扰动和观察(P&O)和增量电导(IC)。为了验证设计的有效性，在不同的辐照度下对这些方法进行了测试。结果表明，采用集成电路MPPT方法控制的微型逆变器具有良好的性能，效率相对高于非MPPT、CV或P&O方法。因此，它可以作为微逆变器拓扑的替代解决方案。

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2018 International Conference on Information and Communications Technology (ICOIACT)

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