面向可靠性的单相无变压器光伏逆变器输入电容设计与分析

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) Pub Date : 2013-03-17 DOI:10.1109/APEC.2013.6520714

Huai Wang, Yongheng Yang, F. Blaabjerg

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引用次数: 37

摘要

虽然99%的效率已被报道，但20年服务时间的目标对并网光伏(PV)逆变器的成本效益解决方案提出了新的挑战。在单相光伏系统中，铝电解电容器是可靠性和寿命方面的薄弱环节。提出了一种以可靠性为导向的单相无变压器光伏逆变器输入电容设计准则。该指南确保在不同的功率水平和环境温度曲线下完成服务时间要求。该理论分析已通过1kw单相光伏逆变器得到验证。

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Reliability-oriented design and analysis of input capacitors in single-phase transformer-less photovoltaic inverters

While 99% efficiency has been reported, the target of 20 years of service time imposes new challenge to cost-effective solutions for grid-connected photovoltaic (PV) inverters. Aluminum electrolytic capacitors are the weak-link in terms of reliability and lifetime in single-phase PV systems. A reliability-oriented design guideline is proposed in this paper for the input capacitors in single-phase transformer-less PV inverters. The guideline ensures that the service time requirement is to be accomplished under different power levels and ambient temperature profiles. The theoretical analysis has been demonstrated by a 1 kW single-phase PV inverter.

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2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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