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燃料电池应用中具有小直流母线电容的逆变器摆动母线运行

Swinging Bus Operation of Inverters for Fuel Cell Applications With Small DC-Link Capacitance

语言:

中文摘要

为提升可靠性,在燃料电池单相逆变器中采用薄膜电容替代电解电容成为趋势。由于薄膜电容容量较小,会导致直流母线产生显著的低频电压波动。本文研究了“摆动母线”运行策略,旨在通过优化控制应对直流侧电压波动,从而在降低成本的同时提升系统整体寿命与可靠性。

English Abstract

For reliability reasons, the employment of small film capacitors instead of electrolytic ones is an interesting alternative for the dc-link in single-phase inverters for fuel cell applications. Due to the low capacitance that can be accomplished at an acceptable cost using this technology, there are large low-frequency voltage fluctuations (100/120 Hz and harmonics) in the dc-link caused by the do...
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SunView 深度解读

该技术主要针对单相逆变器直流母线电容的优化设计,对阳光电源的户用光伏逆变器及小型储能PCS产品具有参考价值。通过采用薄膜电容替代电解电容,可显著提升逆变器在高温、高湿等严苛环境下的长期可靠性,降低故障率。建议研发团队关注“摆动母线”控制策略,在不增加硬件成本的前提下,通过软件算法抑制低频电压波动,从而优化户用逆变器体积与寿命,提升iSolarCloud平台的运维表现。