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A Bus Clamping PWM-Based Improved Control of Grid Tied PV Inverter with LCL Filter Under Varying Grid Frequency Condition
IETE Journal of Research ( IF 1.5 ) Pub Date : 2020-11-23 , DOI: 10.1080/03772063.2020.1844067
A. Shantanu Chatterjee 1
Affiliation  

This paper presents a modified Synchronous Reference Frame Phase locked loop (MSRFPLL) for better synchronizing the output of the inverter with the grid. The proposed PLL is able to track the changes in the grid frequency in a faster way as compared to the conventional synchronous reference frame PLL (SRF-PLL). In order to switch the inverter, an advanced bus clamping based space vector PWM is being used which is novel for photovoltaic application. This PWM gives better DC bus utilization as compared to the conventional Sine PWM technique. To keep the THD within a permissible limit of 5% in accordance with the IEEE-519 & 1547 standard LCL filter with passive damping is implemented. DSPACE-1104 DAC card has been used for better interfacing of the experimental set up with MATLAB. The overall system is also being simulated in MATLAB/Simulink environment and the simulated results have been validated with the experimental results.



中文翻译:

变电网频率条件下基于母线钳位 PWM 的 LCL 滤波器并网光伏逆变器改进控制

本文介绍了一种改进的同步参考帧锁相环 (MSRFPLL),用于更好地使逆变器的输出与电网同步。与传统的同步参考系 PLL (SRF-PLL) 相比,所提出的 PLL 能够以更快的方式跟踪电网频率的变化。为了切换逆变器,正在使用基于空间矢量 PWM 的高级总线钳位,这对于光伏应用来说是新颖的。与传统的正弦 PWM 技术相比,这种 PWM 提供了更好的直流母线利用率。为了根据 IEEE-519 和 1547 标准将 THD 保持在 5% 的允许限度内,实施了具有无源阻尼的 LCL 滤波器。DSPACE-1104 DAC 卡已用于更好地连接实验装置与 MATLAB。

更新日期:2020-11-23
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