• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Energy, Communication, Data Analytics and Soft Computing >DC link voltage control of power conditioning unit during LVRT
【24h】

DC link voltage control of power conditioning unit during LVRT

机译：LVRT期间功率调节单元的直流母线电压控制

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

摘要

The increasing demand of photovoltaic (PV) solar systems and use of power conditioning unit (PCU) in these systems lead to new requirements for the operation and management of the distribution grid, especially during low voltage ride through (LVRT) operation period. LVRT requires PV system to remain as grid connected and it will help to maintain grid voltage and frequency stable during the unexpected condition. This paper proposes a dc-link voltage control of power conditioning unit during LVRT operation. To observe the changes in grid voltage during the LVRT, the high modulation ratio (HMR) is maintained by controlling dc link voltage to attenuate the high frequency harmonics injected into grid. The low voltage operation affects the power quality at point of common coupling (PCC), as a result of the reduced grid current quality induced by the oscillated dc-link voltage. The dc-link voltage can be decreased to a particular value to increase HMR when needed, without weakening the LVRT capability, in order to attenuate the higher order harmonics of output waveform. The control method suggested here will attenuate the double-line frequency dc-link voltage ripple during the asymmetrical grid faults. Due to this, the dc-link voltage will attain the safe operational range value by transferring power ripple to the front-end dc input source. The results are verified in MATLAB/SIMULINK.
机译：光伏（PV）太阳能系统的需求不断增长，在这些系统中使用功率调节单元（PCU）导致对配电网的运行和管理提出了新要求，尤其是在低压穿越（LVRT）运行期间。 LVRT要求光伏系统保持与电网连接，这将有助于在意外情况下保持电网电压和频率稳定。本文提出了LVRT运行期间功率调节单元的直流链路电压控制。为了观察LVRT期间电网电压的变化，通过控制直流母线电压来衰减注入电网的高频谐波，可以维持高调制比（HMR）。低压运行会影响公共耦合点（PCC）的电能质量，这是由于振荡的直流母线电压引起的电网电流质量降低的结果。可以在需要时将直流母线电压降低到特定值以增加HMR，而不会削弱LVRT功能，以衰减输出波形的高次谐波。此处建议的控制方法将减弱非对称电网故障期间的双线频率直流链路电压纹波。因此，通过将功率纹波传输到前端直流输入源，直流母线电压将达到安全工作范围值。结果在MATLAB / SIMULINK中进行了验证。

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