Open AccessOne cycle controlled grid‐tied differential boost inverter
Author(s) -
Purnama Irwan,
Chi PeiChin,
Hsieh YaoChing,
Lin JingYuan,
Chiu HuangJen
Publication year - 2016
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.2015.0611
Subject(s) - control theory (sociology) , total harmonic distortion , inverter , voltage , controller (irrigation) , grid tie inverter , converters , power factor , voltage controller , voltage reference , computer science , topology (electrical circuits) , maximum power point tracking , engineering , voltage divider , electrical engineering , voltage droop , control (management) , agronomy , artificial intelligence , biology
A differential boost inverter (DBI) consists of two bidirectional boost converters and has a differential sinusoidal output voltage. This output voltage is obtained because each bidirectional boost converters generates a dc‐biased sinusoidal voltage. Owing to this characteristic, this inverter topology requires a controller that can track a dc‐biased sinusoidal voltage as the control reference. One cycle control (OCC) is a non‐linear control approach that can meet the requirements and be easily implemented in a simple circuit with constant switching frequency. The controller must be capable of achieving a unity power factor (PF) because the inverter is designed to deliver maximum active power to the grid. Therefore, the sinusoidal reference signal of the OCC is formed by the scaled grid voltage and its derivation. Given this reference signal, the inverter output voltage represents the grid voltage with a small variation phase and amplitude. Furthermore, this strategy will guarantee that the output current and the grid voltage are in phase. An experimental prototype of DBI is implemented to verify that the control approach can achieve PF close to unity such that the maximum active power can be delivered to the grid with minimum current total harmonic distortion.