Open AccessAnalysis and implement of the single‐phase voltage‐controlled grid‐connected inverter
Author(s) -
He Chaojie,
Zhao Jinbin,
Zhang Shuaitao,
Ushiki Shuuichi
Publication year - 2017
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.2016.0446
Subject(s) - inverter , control theory (sociology) , pulse width modulation , power (physics) , voltage , electrical impedance , computer science , grid tie inverter , grid , engineering , electronic engineering , control (management) , electrical engineering , maximum power point tracking , mathematics , physics , quantum mechanics , artificial intelligence , geometry
This study describes the design and implementation of an inverter control algorithm with both the inverter inner controllable impedance and governor‐free characteristics. The inverter controlled as a voltage supply works with open‐loop power control in grid‐connected operation. It is realised that a pulse‐width modulation inverter mimics the primary frequency and voltage modulation characterised similarly to a synchronous generator. On the basis of the proposed control algorithm, the inner controllable impedance and governor‐free characteristics are analysed mathematically. Simultaneously, the authors analyse the output power characteristics of the proposed inverter and the level of the decoupled power control for designing the inner controllable impedance. When the inverter connects with the stiff grid, it will appear as the output current deviation problem. The generation mechanism of the dc component from the proposed inverter is clearly identified. The current deviation compensation control is analysed and implemented to solve it. Simulations and experimental results are given to verify the idea.