Open AccessEnhancement of power quality using double‐band hysteresis controller for the grid integrated renewable energy system
Author(s) -
Rajakumar Vinifa,
Anbukumar Kavitha
Publication year - 2018
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/etep.2623
Subject(s) - power factor , control theory (sociology) , total harmonic distortion , ac power , renewable energy , engineering , controller (irrigation) , harmonics , distributed generation , electrical engineering , electronic engineering , voltage , computer science , artificial intelligence , agronomy , control (management) , biology
Summary With the advancement of power electronics and control techniques, the renewable energy sources are integrated to the grid through highly efficient power electronic interfaces. The voltage source inverter connected at the grid acts as shunt active power filter to mitigate the power quality issues in addition to the power conversion. In this paper, the double‐band hysteresis current controller is implemented to ensure the real and reactive power flow from renewable energy system (RES) to the grid through voltage source inverter. In order to show the efficacy of the controller, 3 different modes depending on the climatic conditions such as (1) no RES power, (2) lacking RES power, and (3) surplus RES power are taken into consideration. The synchronous detection method with equal current criterion is used to generate the reference current. This criterion makes the grid currents balanced and sinusoidal even under unbalanced grid voltage conditions. The control system guarantees the unity power factor in the grid side with reduced total harmonic distortion in the presence of nonlinear loads. The average switching frequency is also reduced using double‐band hysteresis current controller which is proved by simulation, and the performance of the system is validated with the experimental results.