Next Article in Journal
Exploitation of Mowed Grass from Green Areas by Means of Anaerobic Digestion: Effects of Grass Conservation Methods (Drying and Ensiling) on Biogas and Biomethane Yield
Previous Article in Journal
Extraction of Partial Discharge Pulses from the Complex Noisy Signals of Power Cables Based on CEEMDAN and Wavelet Packet
Open AccessArticle

A Unified Method for Online Detection of Phase Variables and Symmetrical Components of Unbalanced Three-Phase Systems with Harmonic Distortion

1
Department of Electrical Engineering and Information Technology, Munich University of Applied Sciences (MUAS), 80335 Munich, Germany
2
Munich School of Engineering, Technical Unversity of Munich (TUM), 85748 Garching, Germany
*
Author to whom correspondence should be addressed.
Energies 2019, 12(17), 3243; https://doi.org/10.3390/en12173243
Received: 15 July 2019 / Revised: 13 August 2019 / Accepted: 14 August 2019 / Published: 22 August 2019
This paper presents a method for online detection of symmetrical components of arbitrarily distorted and biased three-phase input signals. This method is based on Second-Order Generalized Integrators (SOGIs), for which a new tuning based on a gradient search is presented to achieve the fastest possible estimation. Frequency estimation is achieved by a Frequency Locked Loop (FLL) with Gain Normalization (GN) for which an Output Saturation (OS) is applied; this OS guarantees stability of the overall system. Offset detection is implemented by a combination of High-Pass Filter (HPF) and HPF-Amplitude Phase Correction (APC HPF ); the HPF filters out any offset, where the APC reconstructs the original offset-free signal. An identical method (APC LPF ) can be used for the implemented Low-Pass Filter (LPF) used for noise filtering. The resulting estimates are then used for Harmonic Sequence Detection (HSD) of each harmonic. For the overall system, stability is proven. The estimation performances of the proposed overall system are verified by simulation results. The improvements in tuning and offset detection are compared to standard approaches. View Full-Text
Keywords: second-order generalized integrator; symmetrical components; real Fortescue transformation; frequency locked-loop; DC-offset detection; frequency detection; amplitude detection; stability analysis; convergence analysis second-order generalized integrator; symmetrical components; real Fortescue transformation; frequency locked-loop; DC-offset detection; frequency detection; amplitude detection; stability analysis; convergence analysis
Show Figures

Figure 1

MDPI and ACS Style

Hackl, C.M.; Landerer, M. A Unified Method for Online Detection of Phase Variables and Symmetrical Components of Unbalanced Three-Phase Systems with Harmonic Distortion. Energies 2019, 12, 3243. https://doi.org/10.3390/en12173243

AMA Style

Hackl CM, Landerer M. A Unified Method for Online Detection of Phase Variables and Symmetrical Components of Unbalanced Three-Phase Systems with Harmonic Distortion. Energies. 2019; 12(17):3243. https://doi.org/10.3390/en12173243

Chicago/Turabian Style

Hackl, Christoph M.; Landerer, Markus. 2019. "A Unified Method for Online Detection of Phase Variables and Symmetrical Components of Unbalanced Three-Phase Systems with Harmonic Distortion" Energies 12, no. 17: 3243. https://doi.org/10.3390/en12173243

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop