Low Latency Stockwell Transform Based Secured Distance Protection Scheme for Power Network Connected with High Renewable Penetration, Protection and Automation Conference

Power electronic converter (PEC) interfaced renewable energy generators (REGs) are increasingly being integrated to the power gird. With the high renewable power penetration levels, one of the key power system parameters, namely reactive power is affected, provoking steady-state voltage and dynamic/ transient stability issues. The performance of existing fault detection and phase selection scheme degrades in presence of PEC interfaced REGs power transmission network. This paper deals with a comprehensive analysis to test the performance of available distance protection, that can be used in transmission networks with high renewable power penetration levels. The performance of the different vendor distance relay is compared for different type fault in transmission line. Further, the new fast S-transform (FST) based hybrid scheme has been discussed that is capable of operating under challenging conditions. The computational complexity of FST is much lower than the S-transform. Therefore, the method is a good choice for real-time applications for the time-frequency analysis of faults in a presence of PEC interfaced REGs power transmission network. The proposed FST-based method is highly efficient and also meet the speed criteria of the relaying function when performing the task. The work is part of the EU project MIGRATE dealing with Massive Integration of Power Electronic Equipment