Open AccessKullback‐Leibler divergence based differential protection scheme for shunt compensated transmission line
Author(s) -
Biswal Sandeep,
Tajdinian Mohsen,
Adly Ahmed. R.,
Patidar Ram Dayal,
Bhoi Akash Kumar,
Rathore Natwar Singh
Publication year - 2021
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/gtd2.12136
Subject(s) - control theory (sociology) , transmission line , computer science , electric power system , electric power transmission , robustness (evolution) , protective relay , time domain , differential protection , power system protection , electronic engineering , engineering , transformer , voltage , power (physics) , electrical engineering , artificial intelligence , telecommunications , biochemistry , physics , chemistry , control (management) , quantum mechanics , computer vision , gene
Conventional transmission line protection algorithms may experience delay or even mal‐operation in presence of shunt compensation due to various non‐fault transient disturbances. This paper presents a time‐domain differential protection technique based on Kullback–Leibler divergence with thresholding logic for mid‐point static synchronous compensator compensated transmission system. A detection index for each phase currents are computed in order to discrimination the fault and non‐fault scenarios. Different structure of power systems modelled using EMTDC/PSCAD are simulated to generate numerous numbers of test cases in order to evaluate the applicability of the proposed differential protection logic. Proposed method is also efficient to differentiate the faults during various non‐fault events like capacitor switching, sudden load change, power swing, and current transformer saturation including external fault cases. Results and comparative assessment with recently proposed time‐frequency and commercial current differential relaying reports demonstrate the efficacy and robustness of the proposed technique. The results confirmed the accurate operation of the proposed protection technique.