Abstract The changes in power quality are very quick and a difficult task to know under power networks. Most of the power quality issues are observed in interconnected networks due to different sources of power generation can be attributed to temporary faults and sudden loading conditions. The Flexible AC Transmission Systems (FACTS) provide one of the fastest controls of reactive and active power through a multi bus system. The Static Var Compensator (SVC) is one of the FACTS controllers with reasonably good features. Operating with multi terminal systems, when incorporating with FACTS devices are very complex in power systems which needs effective and detailed study, particularly for fault identification. The present research work explores the analysis of wavelet multiresolution with the usage of the mother wavelet Bior1.5 for different Power Quality problems are presented to evaluate the analysis of a 5-bus network. In this work different power quality issues are tested during different faulty conditions and when sudden load of 50 MW injecting in to the line conditions and the performance and effectiveness is analysed in the environment of SVC. The effectiveness of wavelets is useful to find out the fault in under different fault conditions as well as under sudden loading conditions.