This thesis includes the basics of microgrid and technical challenges associated with MG protection. Also, this thesis reviews the existing schemes with their limitation and presents state of the art on emerging protection schemes developed for AC microgrid. Then, time-frequency analysis of transient events using conventional time-frequency transforms including S-Transform, Continuous wavelet transform has been performed and it is observed that these conventional transforms results low-resolution T-F representation. Thus, this problem is mitigated by introducing synchrosqueezing wavelet transform (SWT). From the results, obtained from different case studies, it is observed that the SWT enhances the readability and resolution of TFR as compared to other TFA tools. For the discrimination and classification of the fault and non-fault scenarios, quantitative analysis is required. This emerges the need for a strong quantifier with a fast response time is required. For this purpose concept of teager energy operator is adopted with continuous wavelet transform which is further used to train multiple classifiers including, KNN, DT, and RF.
1900520885003 Ayushi Gupta