Proficient operation of grid interfaced solar PV system for power quality improvement during adverse grid conditions

作     者：Shukl, Pavitra Singh, Bhim 

作者机构：Indian Inst Technol Delhi Dept Elect Engn New Delhi 110016 India 

出 版 物：《IET GENERATION TRANSMISSION & DISTRIBUTION》 (IET发电，输电与配电)

年 卷 期：2020年第14卷第25期

页      面：6330-6337页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：J.C. Bose Fellowship [RP03128] OPAL-RT [RP03253] FIST project [RP03195G] 

主　　题：smart power grids power generation control photovoltaic power systems power supply quality reactive power solar power biquadratic filters power harmonic filters solar cell arrays proficient operation grid interfaced solar PV system power quality improvement adverse grid conditions solar energy distribution network seasonal day-to-day variability solar power generation power quality deterioration weak utility grid smart grid operability power exchange PQ indices multifunctional control capability quantisation errors control loops biquad filter utilisation reactive power compensation unbalanced loading conditions weak grid conditions solar photovoltaic array variable perturbation step size grid voltage load currents fundamental load current harmonics mitigation adaptive perturb and observe technique IEEE-519 standard 

摘      要：The penetration of solar energy into the distribution network is affected by the seasonal and day-to-day variability of the solar power generation. In underdeveloped and developing countries, the power quality (PQ) deterioration issues are primarily observed due to the presence of the weak utility grid. Therefore, smart grid operability is achieved through power exchange along with the improvement in PQ indices by the application of the biquad filter, thereby exhibiting multifunctional control capability. The biquad filter is less affected by quantization errors and involves no additional usage of sensors or control loops, which are the significant advantages observed in its implementation. The biquad filter utilization in this work, includes the estimation of fundamental load current along with mitigation of harmonics, improving PQ, reactive power compensation, and satisfactory performance during voltage unbalance, sag, distortion, swell, and unbalanced loading conditions, which are observed during weak grid conditions. The stochastic inputs of the solar PV array interfaced utility grid system are agitated due to the erratic availability of solar power, and are overcome through an adaptive perturb and observe technique, which uses a variable perturbation step size. Test cases considered here, validate the performance in accordance to the IEEE-519 standard.