Open AccessEnhanced orthogonal signal generator for a single‐phase grid‐connected converter
Author(s) -
Taghizadeh Seyedfoad,
Hossain M. Jahangir,
Lu Junwei
Publication year - 2018
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5253
Subject(s) - generator (circuit theory) , grid , signal (programming language) , computer science , phase (matter) , signal generator , single phase , electronic engineering , electrical engineering , physics , telecommunications , mathematics , engineering , power (physics) , geometry , quantum mechanics , programming language , chip
This study presents a new orthogonal signal generation (OSG) technique for the control system of a single‐phase grid‐connected voltage‐source converter (VSC). The existing methods mostly suffer from delay, rely on the system parameters, or require multiple inputs. Among them, the second‐order generalised integrator (SOGI) excludes the drawbacks of the other methods and shows better steady‐state and dynamic response. The proposed OSG method here includes the advantages of the SOGI technique while demonstrating superior dynamic response and higher disturbance rejection capability. It is structurally simple without adding complexity to the control system. The proposed method is implemented in a DQ ‐frame current controller and its feasibility and reliability are verified through mathematical analysis, simulation, and experimental results.