• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Compatibility, Power Electronics and Power Engineering >Condition monitoring of dc-link capacitor utilizing zero state of solar PV H5 inverter
【24h】

Condition monitoring of dc-link capacitor utilizing zero state of solar PV H5 inverter

机译：利用太阳能PV H5逆变器零状态的直流环节电容器状态监测

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

摘要

Single phase direct grid feeding solar photovoltaic (PV) inverters are used to interface with the grid. Aluminum Electrolytic Capacitors (AECs) are used to suppress dc-link voltage oscillation in these inverter. Life of solar PV inverter system is limited due to the use of these capacitors. With ageing its capacitance decreases, which may lead to increased voltage ripple, thereby reduced average power extraction from solar PV and/or damage to semiconductor switches due to overvoltage. Further, prolonged used of aged capacitor could lead to open circuit of the dc-link due to degradation of oxide layer in the AEC. Therefore, to improve the reliability of system, health monitoring of capacitor is desirable. In this paper, a technique for condition monitoring of dc-link capacitor is proposed for the solar PV H5 inverter. Proposed technique estimates capacitance by utilizing the sampled values of solar PV voltage and current during zero states of the inverter. Key advantage is that the existing voltage and current sensors and digital processor/controller are used for estimation of capacitance. Further, the proposed technique is also applicable to other full bridge based, single phase inverters. To validate the efficacy of proposed technique, detailed simulation studies are performed using MATLAB-Simulink. Further, error analysis in the estimation of capacitance values using proposed technique under different levels of solar radiation over the day is provided. Practical aspects of the proposed technique are also discussed in this paper.
机译：单相直接并网馈电太阳能光伏（PV）逆变器用于与并网。铝电解电容器（AEC）用于抑制这些逆变器中的直流母线电压振荡。由于使用这些电容器，太阳能光伏逆变器系统的寿命受到限制。随着老化，其电容减小，这可能导致电压纹波增加，从而减少了从太阳能PV提取的平均功率和/或由于过电压而损坏半导体开关。此外，由于AEC中氧化层的退化，长时间使用老化的电容器可能导致dc链路开路。因此，为了提高系统的可靠性，需要对电容器进行健康监测。本文提出了一种用于太阳能光伏H5逆变器的直流环节电容器状态监测技术。提出的技术通过利用逆变器零状态期间太阳能光伏电压和电流的采样值来估计电容。关键优势在于，现有的电压和电流传感器以及数字处理器/控制器可用于估算电容。此外，提出的技术还适用于其他基于全桥的单相逆变器。为了验证所提出技术的有效性，使用MATLAB-Simulink进行了详细的仿真研究。此外，提供了在一天中不同水平的太阳辐射下使用所提出的技术估算电容值的误差分析。本文还讨论了提出的技术的实际方面。

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