Mitigation of power quality problems associated with solar PV integration into low voltage distribution network in India

The emergence of renewable power energy has opened a new horizon to the generation, transmission and distribution of electrical power. Higher electricity demand, reduction in non-renewable (fossil fuels) and increasing demands of renewable energy, the combination of solar photovoltaic (\pmb{PV}) generation in low voltage grid is increasing prominence in India. Many distributed energy resources are associated with the utility network or microgrids with the assistance of a power electronics interface to make a hybrid system in nature. However, power quality is affected by various internal and external factors of power system including non-linear loads or induction loads, changing load demands, faults and different weather patterns to deteriorate the performance system. This thesis focuses on power quality issues such as mismatch of voltage (Voltage dip) and poor power factor and possible solution of these \pmb{PQ} issues is addressed by FACTS device with two different energy storage devices. \pmb{D}-STATCOM is a part of FACTS device that has excellent voltage regulation capacity through reactive power compensation in hybrid power system. By voltage control topology, the proposed \pmb{D}-STATCOM can mitigate voltage dip and poor power factor problems during the addition of 11KVA rated extra load in hybrid power during specific time 0.1s to 0.3s interval. Furthermore, \pmb{D}-STATCOM with energy storage also provides active and reactive power compensation simultaneously and independently in 15KVA low voltage electrical distribution system integrates with 25KW Solar \pmb{PV} hybrid system. D-STATCOM with battery energy storage and capacitor to check the effectiveness of this combination for mitigation of these power quality problems through comparison of results. In this project, simulation tool, namely MATLAB/SIMULINK, is used to study the of power quality problems and mitigation device. From the simulation data shows that D-STATCOM with BESS is an effective solution of voltage sag poor power factor between 0.1s to 0.3s and improve voltage profile at the desired stage and help to compensation of active reactive power compared DSTATCOM with a capacitor. The future upgrade of the work is proposed as needs be to fill the gap.