In this study, a novel smooth least mean square (LMS) algorithm for controlling PV inverter has been proposed to estimate the reference current for synchronisation of solar photovoltaic (SPV) to the grid. The proposed control extracts both active and reactive fundamental components of the load current with improved convergence rate. These currents are compared with sensed grid currents to generate gating pulses for a voltage source converter. It also compensates the load harmonics, reduces voltage fluctuation at point of common coupling and supplies the reactive power demand of the local load. The algorithm has been tested under steady state and transient conditions for input variation as well as load variation under the power factor correction mode of operation. The algorithm has been developed in MATLAB/Simulink. Further, the efficacy of the proposed control algorithm has been tested on prototype hardware setup developed in the laboratory using dSPACE1104. The total harmonic distortion at the grid side, obtained from simulated and hardware results are well within the IEEE standards.

中文翻译：

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平滑的基于LMS的SPV系统自适应控制与电网相连，可提高电能质量

在这项研究中，提出了一种新颖的用于控制光伏逆变器的平滑最小均方（LMS）算法，以估算用于太阳能光伏（SPV）与电网同步的参考电流。所提出的控制以提高的收敛速度提取负载电流的有功和无功基本分量。将这些电流与感测到的电网电流进行比较，以生成用于电压源转换器的选通脉冲。它还可以补偿负载谐波，减少公共耦合点的电压波动，并提供本地负载的无功功率需求。该算法已在稳态和瞬态条件下针对功率变化校正操作模式下的输入变化以及负载变化进行了测试。该算法已在MATLAB / Simulink中开发。进一步，建议的控制算法的功效已在实验室中使用dSPACE1104开发的原型硬件设置上进行了测试。从仿真和硬件结果获得的电网侧总谐波失真完全符合IEEE标准。