Analysis and Verification of Compound SRFPI-LADRC Strategy for an Off-Grid Single-Phase Inverter

The linear active disturbance rejection control (LADRC) is mainly applied for tracking a step signal, and it is inadequate to realize satisfactory performance in the control of a single-phase inverter whose reference signal is sinusoidal. In this paper, an improved voltage control strategy based on...

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Bibliographic Details
Published in:International transactions on electrical energy systems 2022, Vol.2022, p.1-14
Main Authors: Lin, Liaoyuan, Li, Haoda, Zhu, Kai, Shi, Lingling, Li, Ping
Format: Article
Language:English
Subjects:
Controllers
Electric potential
Error analysis
Harmonic distortion
Inverters
Proportional integral
Reference signals
Tracking errors
Transient response
Voltage
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Summary:The linear active disturbance rejection control (LADRC) is mainly applied for tracking a step signal, and it is inadequate to realize satisfactory performance in the control of a single-phase inverter whose reference signal is sinusoidal. In this paper, an improved voltage control strategy based on compound synchronous reference frame proportional-integral (SRFPI) control and LADRC is proposed. The SRFPI and LADRC remain relatively independent without complicating the control parameter design. Detailed theoretical analyses on the compound strategy and its performance are presented, indicating that it inherits the advantages of the two controllers. Moreover, contrast experiments are carried out to verify the feasibility and superiority of the proposed control strategy. The results show that the system achieves a small steady-state error, voltage tracking error, fast transient response, and low total harmonic distortion (THD) when feeding a highly nonlinear load.
ISSN:2050-7038
2050-7038
DOI:10.1155/2022/8131611