Multi-Resonant based Output Voltage Control of Autonomous Distributed Generators

Saim Abdelhakim,Mellah Rabah,Houari Azeddine,Q Huang,M Kolhe

doi:10.1051/e3sconf/20186407004

Abstract

The distributed or decentralized generation electricity constitutes the central stone of various recent energy models, such as the intelligent electrical supply networks. The quality of energy in this type of structure depends primarily on the strategy of control adopted, in order to guarantee proper operation according to the international standards. The strategy of control proposed in this paper uses two control loops. An internal control loop aims at deadening the phenomena of resonance while ensuring the required control dynamic for fast disturbance rejection. As for the external control loop, a multi-resonant composed of a stabilizing state feedback that ensure an asymptotic tracking of the voltage reference with a weak rate of harmonic distortion. Finally, experimental results are presented to show the performances and feasibility of the proposed control strategy.

Highlights

The autonomous systems of distributed generation appropriate to electricity require an adequate and permanent control of the tension of the bus AC in order to ensure a quasi sinusoidal tension with a weak rate of harmonic distortion (THD), and this, independently of the dynamics of the fed electric charges
The autonomous electrical supply networks with low tension (BT) are regarded as fragile structures because of the difficulties related to the maintenance of a bus tension with amplitude and frequency constants
These difficulties are exacerbated by the proliferation of the electric charges with strong not linearity, as by the intermittency which characterizes the majority of the sources of renewable energies

Summary

Introduction

The autonomous systems of distributed generation appropriate to electricity require an adequate and permanent control of the tension of the bus AC in order to ensure a quasi sinusoidal tension with a weak rate of harmonic distortion (THD), and this, independently of the dynamics of the fed electric charges. The autonomous electrical supply networks with low tension (BT) are regarded as fragile structures because of the difficulties related to the maintenance of a bus tension with amplitude and frequency constants. These difficulties are exacerbated by the proliferation of the electric charges with strong not linearity, as by the intermittency which characterizes the majority of the sources of renewable energies. Application of the resonant controllers in the control of the autonomous systems of distributed generation of electricity must face the recurring variations of frequency in the micro grid network [6]. Research in progress, is focused on the design of a multi resonant controller who is more robust with regard to the fluctuation of the frequency all while maintaining the effectiveness of the multi resonant controllers in the follow-up and the rejection of periodic signals

Objectives

Results

Conclusion