• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>IEEE Photovoltaic Specialists Conference >Purely inductive ripple power storage for improved lifetime in solar photovoltaic micro-inverter topology
【24h】

Purely inductive ripple power storage for improved lifetime in solar photovoltaic micro-inverter topology

机译：纯电感纹波功率存储，可延长太阳能光伏微逆变器拓扑的使用寿命

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In a solar photovoltaic (PV) system, decoupling of power ripple is necessary in order to maximize the energy harvest because the power flowing to the grid is time varying while the power extracted from the photovoltaic panel needs to be maintained constant. This necessitates the requirement of energy storage elements between the input and output to decouple the unbalance of power. The location of the decoupling element can be either at the PV-side or the AC-side. The traditionally used energy storage element is the electrolytic capacitor. Due to its fast degradation, it is often replaced by film capacitors with active decoupling schemes that perform better at higher temperatures with less degradation, however at significantly higher cost. From an economic perspective, both electrolytic and film capacitors have similar lifetimes, which are substantially lower than the typical warranty of the solar module (20–25 years) though. An inductor, in contrast, is an energy storage element with aging of less than 0.5 percentage over a 20-year lifecycle. Further, the reduced temperature drift compared to a capacitor makes it a highly suitable candidate for storage of power ripple in solar photovoltaic power converters. This paper demonstrates a proof-of-concept decoupling scheme using an inductor as the energy storage element at the PV-side of a DC-AC single stage power converter.
机译：在太阳能光伏（PV）系统中，功率波动的去耦是必要的，以便最大化能量收集，因为流到电网的功率是随时间变化的，而从光伏面板提取的功率需要保持恒定。这需要在输入和输出之间需要能量存储元件，以消除功率的不平衡。去耦元件的位置可以在PV侧或AC侧。传统上使用的储能元件是电解电容器。由于其快速降级，它通常被具有主动去耦方案的薄膜电容器所取代，该方案在较高温度下表现更好，降级较少，但是成本却高得多。从经济角度来看，电解电容器和薄膜电容器的寿命相似，但远低于太阳能电池组件的典型保修期（20-25年）。相比之下，电感器是一种储能元件，在20年的生命周期中，其老化时间不到0.5％。此外，与电容器相比，降低的温度漂移使其非常适合用于存储太阳能光伏功率转换器中的功率纹波。本文演示了一种概念证明去耦方案，该方案在DC-AC单级功率转换器的PV侧使用电感器作为储能元件。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号