Energy conversion efficiency of single-phase transformerless PV inverters

Ziya Ozkan, A. Hava
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引用次数: 5

Abstract

In grid-connected photovoltaic (PV) applications, power semiconductor energy conversion efficiency of PV inverters is one of the major figures of merits to evaluate and compare these systems as the payback ratio of the overall system is tightly related to the energy conversion efficiency and as semiconductor losses comprise the majority of energy losses. In order to wisely choose the PV inverter topology and associated semiconductors, analytic evaluation of semiconductor losses of topologies is required. Furthermore, the evaluation of these losses serves the purpose of designing PV inverters in terms of better thermal management and reliability. In this study, the analytical semiconductor efficiency evaluation of PV inverters promising high efficiency is performed for 3 kW and 10 kW power ratings based on selected semiconductor datasheets and average power per switching cycle (APPSC) method. A comparison of energy efficiency of topologies regarding power levels is provided.
单相无变压器光伏逆变器的能量转换效率
在并网光伏(PV)应用中,光伏逆变器的功率半导体能量转换效率是评估和比较这些系统的主要优点之一,因为整个系统的投资回报率与能量转换效率密切相关,并且半导体损耗占能量损耗的大部分。为了明智地选择光伏逆变器拓扑和相关半导体,需要对拓扑的半导体损耗进行分析评估。此外,对这些损耗的评估有助于设计更好的热管理和可靠性的光伏逆变器。在本研究中,基于选定的半导体数据表和每开关周期平均功率(APPSC)方法,对具有较高效率的光伏逆变器进行了3 kW和10 kW额定功率的分析半导体效率评估。提供了关于功率水平的拓扑的能源效率的比较。
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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