A Robust Control Scheme for Renewable-Based Distributed Generators Using Artificial Hydrocarbon Networks

Antonio Rosales,Arturo Molina,Pedro Ponce,Hiram Ponce

doi:10.3390/en12101896

Antonio Rosales, Arturo Molina + Show 2 more

Open Access

https://doi.org/10.3390/en12101896

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Journal: Energies	Publication Date: May 18, 2019
Citations: 2	License type: CC BY 4.0

Affiliation: Tecnológico de Monterrey, Universidad Panamericana

Abstract

Distributed generators (DGs) based on renewable energy systems such as wind turbines, solar panels, and storage systems, are key in transforming the current electric grid into a green and sustainable network. These DGs are called inverter-interfaced systems because they are integrated into the grid through power converters. However, inverter-interfaced systems lack inertia, deteriorating the stability of the grid as frequency and voltage oscillations emerge. Additionally, when DGs are connected to the grid, its robustness against unbalanced conditions must to be ensured. This paper presents a robust control scheme for power regulation in DGs, which includes inertia and operates under unbalanced conditions. The proposed scheme integrates a robust control algorithm to ensured power regulation, despite unbalanced voltages. The control algorithm is an artificial hydrocarbon network controller, which is a chemically-inspired technique, based on carbon networks, that provides stability, robustness, and accuracy. The robustness and stability of the proposed control scheme are tested using Lyapunov techniques. Simulation, considering one- and three-phase voltage sags, is executed to validate the performance of the control scheme.

Highlights

Distributed generators (DGs) based on green-energy technologies are strongly promoted in governmental and industrial policies around in the world, due to agreements that promote the decrement of energy generation using fossil fuels [1,2]
This paper presents a robust control scheme for power regulation in DGs, which includes inertia and operates under unbalanced conditions
This paper proposes a robust control algorithm to tackle the aforementioned issues

Summary

Introduction

Distributed generators (DGs) based on green-energy technologies are strongly promoted in governmental and industrial policies around in the world, due to agreements that promote the decrement of energy generation using fossil fuels [1,2]. Solar panels, and storage systems are the most promising technologies [3,4] to reduce the use of fossil fuels. DGs based on renewable energy resources are denominated inverter-interfaced units because a power converter is employed to tie the DG to the grid. As inverter-interfaced units, such as solar panels and storage systems, are non-synchronous generators, they lack rotational inertia, causing large frequency variations which affect the stability of the grid [6]. An useful alternative to alleviate instability is the addition of virtual inertia in the control scheme—namely, virtual synchronous generator (VSG)

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