Open AccessProficient operation of grid interfaced solar PV system for power quality improvement during adverse grid conditions
Author(s) -
Shukl Pavitra,
Singh Bhim
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2020.1173
Subject(s) - photovoltaic system , digital biquad filter , grid connected photovoltaic power system , harmonics , smart grid , grid , computer science , electric power system , electronic engineering , distributed generation , control theory (sociology) , renewable energy , engineering , automotive engineering , reliability engineering , voltage , maximum power point tracking , electrical engineering , active filter , power (physics) , inverter , mathematics , control (management) , physics , geometry , quantum mechanics , artificial intelligence
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.