This study investigates the possible effects of high-penetration REG and EVCS systems on PQ in distribution
systems under varying weather and loading conditions. All information related to modelling of EVCS, WF, PV, and
FC systems as well as weather conditions were obtained from different power companies and the Malaysian
Meteorological Department, respectively. A radial 16-bus test system with distributed EVCS, WF, PV, and FC units
was simulated using MATLAB/Simulink software under various weather conditions. The results indicated that the
installed hybrid REG and EVCS systems cause frequency and voltage variations, voltage drop, power factor
reduction and harmonic distortion, thus creating severe PQ problems in the system components.