Preprint Article Version 1 This version is not peer-reviewed

Instantaneous Symmetrical Component Estimator Using Second Order Generalized Integrator under Distorted Voltage Conditions

Version 1 : Received: 17 May 2017 / Approved: 18 May 2017 / Online: 18 May 2017 (04:40:16 CEST)

How to cite: Ozsoy, E.; Padmanaban, S.; Siano, P.; Ahmad, F.; Akhtar, R.; Sabanovic, A.; Loia, V. Instantaneous Symmetrical Component Estimator Using Second Order Generalized Integrator under Distorted Voltage Conditions. Preprints 2017, 2017050136 (doi: 10.20944/preprints201705.0136.v1). Ozsoy, E.; Padmanaban, S.; Siano, P.; Ahmad, F.; Akhtar, R.; Sabanovic, A.; Loia, V. Instantaneous Symmetrical Component Estimator Using Second Order Generalized Integrator under Distorted Voltage Conditions. Preprints 2017, 2017050136 (doi: 10.20944/preprints201705.0136.v1).

Abstract

Frequency, amplitude and phase information of the grid voltage are of great importance in constructing a robust controller structure for grid connected inverter systems. This paper presents a simple and robust approach for the instantaneous estimation of positive and negative sequence voltage components under distorted voltage conditions. A second order generalized integrator (SOGI) is used to filter the distorted voltage and to generate orthogonal voltage components for each of the three phases. These filtered and orthogonal components are used for instantaneous calculation of symmetrical components. The implemented method is frequency adaptive; the method is demonstrated and compared to a conventional phase locked loop (PLL) technique with both MATLAB/Simulink simulations and experiments utilizing the dSPACE ds1103 digital controller.

Subject Areas

generalized integrator; grid connected inverters; phase locked loops; renewable energy; symmetrical components; unbalanced voltage

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