Abstract
This paper proposes a new method for the simultaneous determination of the optimal control parameters of proportional resonant controllers and the optimal design of the output filter of a grid-tied three-phase inverter. The proposed method, based on the grey wolf optimization (GWO) algorithm, addresses both optimization problems as a single process to achieve a better system frequency response. It optimizes the unknown parameters by using a fitness function to find the best trade-off between the following fundamental terms: the harmonic attenuation rate; the power loss, through the damping resistor; and the current tracking error in the stationary frame, ensuring the system and grid stability. To validate the proposed optimization methodology, two case studies are considered with different output filter topologies with passive damping methods. The results obtained from the proposed optimization procedure were analyzed and discussed according to the fitness function terms.
Highlights
The over-exploitation of non-renewable natural resources has led an overall environmental degradation on the planet
The optimization process reached a fitness value of 0.3210, where almost 90% of the fitness value is related to normalized root-mean-square error (NRMSE), which quantifies the error of the proportional resonant (PR) current controllers in both axes of the stationary frame
This paper proposed a new method to simultaneously determine the optimal control parameters of PR controllers and optimize the design of the output filter of a grid-tied three-phase inverter
Summary
The over-exploitation of non-renewable natural resources has led an overall environmental degradation on the planet. There are some essential factors to ensure that the coupling between the inverter and the electrical grid is carried out efficiently and meets the specified standards [5]. These factors can be roughly divided into three categories: control structures, control parameters optimization, and hardware configuration [6]. Hysteresis controllers are widely used because of their characteristics: simple implementation, low cost, and fast dynamic response [8,9]. These controllers have the disadvantages of introducing harmonics into the current shape. They operate with a variable switching frequency, making the output filter design more complex [10]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
