Open AccessPower quality improvement in distribution system using distribution static compensator with super twisting sliding mode control
Author(s) -
Ullah Mian Farhan,
Hanif Aamir
Publication year - 2021
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/2050-7038.12997
Subject(s) - voltage sag , control theory (sociology) , robustness (evolution) , matlab , swell , total harmonic distortion , sliding mode control , ac power , voltage , engineering , voltage source , static var compensator , power factor , electronic engineering , computer science , nonlinear system , power quality , control (management) , electrical engineering , physics , artificial intelligence , quantum mechanics , operating system , biochemistry , chemistry , thermodynamics , gene
Summary Nowadays, power quality (PQ) issues are gaining considerable attention to both electrical utilities and end‐users as they are causing significant financial losses to industrial customers. Among PQ issues, voltage sag and swell are the most important and frequently occurring problems for sensitive load. Voltage sag/swell can be mitigated using a distribution static compensator (DSTATCOM), which is fast, effective, and flexible custom power device. Its performance mostly depends upon the designed control scheme for the switching of voltage source converter (VSC). In this research work, a fused control scheme based on second‐order super twisting algorithm (STA) and sliding mode control (SMC) for VSC of DSTATCOM is developed, that can effectively eliminate the effects of voltage sag/swell as well as compensate active and reactive power in distribution system. STA along with standard SMC is used to eliminate the chattering effect which is the drawback of SMC alone, while keeping its other properties such as robustness, faster response time, and insensitive to load variation. The proposed control scheme for DSTATCOM is simulated on SimPower system toolbox of MATLAB/Simulink. Both linear as well as nonlinear loads have been considered for the purpose of static and dynamic analysis. Simulation results show that the super twisting sliding mode control (STSMC) for DSTATCOM can effectively detect and correct voltage sag/swell and compensate active and reactive power within 2.5 milliseconds as per semiconductor processing equipment voltage sag immunity standard for sensitive load (SEMI F‐47 Standard). Total harmonic distortions (THD) measured in all simulated cases is found to be less than 5%. The frequency response analysis shows good stability properties of developed system. A comparison analysis is also carried out between the classical SMC and the proposed STSMC, in which the proposed algorithm with SMC shows better performance than classical SMC.