Analysis and implement of the single-phase voltage-controlled grid-connected inverter

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...

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Bibliographic Details
Published in:IET power electronics 2017-09, Vol.10 (11), p.1344-1352
Main Authors: He, Chaojie, Zhao, Jinbin, Zhang, Shuaitao, Ushiki, Shuuichi
Format: Article
Language:English
Subjects:
current deviation compensation control
dc component
decoupled power control level analysis
grid‐connected operation
inverter governor‐free characteristics
inverter inner controllable impedance characteristics
open loop systems
open‐loop power control
output current deviation problem
output power characteristics analysis
power control
power grids
primary frequency modulation
primary voltage modulation
pulse‐width modulation inverter
PWM invertors
Research Article
single‐phase voltage‐controlled grid‐connected inverter
synchronous generator
synchronous generators
voltage control
voltage supply
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Summary: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.
ISSN:1755-4535
1755-4543
1755-4543
DOI:10.1049/iet-pel.2016.0446