This article deals with the implementation of a control approach for an active power transfer between solar photovoltaic (PV) array and the grid/ load along-with power quality (PQ) improvement by eliminating harmonics and compensating reactive power required by the load in the distribution network. The PQ problems at the point of intersection, are increasing preeminently with respect to voltage and current harmonics due to integration of renewable sources. The recursive digital filter control implemented here for PV grid interfaced system is efficient in improving PQ indices by operating round the clock and ensuring power transfer between utility grid and connected loads. The prominence of the control algorithm lies in the efficient switching of voltage source converter (VSC), by generating reference grid currents, which are obtained through indirect current control technique. The recursive digital filter is utilized for processing the load currents and extracting the active power component of them. These active power components of load currents are used for generating the reference grid currents in this system. A prototype of the system is developed in the laboratory and its performance is studied for varying loads, changing solar insolation, and voltage swell, voltage sag and voltage distortion conditions.

中文翻译：

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基于递归数字滤波器的并网太阳能光伏系统电能质量改进控制

本文介绍了通过消除谐波和补偿配电中负载所需的无功功率来实现太阳能光伏 (PV) 阵列和电网/负载之间有功功率传输的控制方法以及电能质量 (PQ) 的实现。网络。由于可再生能源的整合，交叉点的 PQ 问题在电压和电流谐波方面正在显着增加。此处为光伏电网接口系统实施的递归数字滤波器控制通过全天候运行并确保公用电网与连接负载之间的电力传输，可有效提高 PQ 指数。控制算法的突出之处在于电压源换流器 (VSC) 的有效切换，通过生成参考电网电流，这些是通过间接电流控制技术获得的。递归数字滤波器用于处理负载电流并提取它们的有功功率分量。负载电流的这些有功功率分量用于在该系统中产生参考电网电流。在实验室中开发了该系统的原型，并研究了其在不同负载、不断变化的日照、电压骤升、电压骤降和电压失真条件下的性能。