A Novel Algorithm for Characterizing Measured Three-Phase Voltage Sags

2012 ◽  
Author(s):  
Jairo Blanco Solano ◽  
Jorge Luis Jagua ◽  
Johann F. Petit Suarez ◽  
Gabriel Ordonez Plata ◽  
Victor Barrera Nunez
Keyword(s):  
Voltage Sags ◽  
Phase Voltage ◽  
Three Phase ◽  
Novel Algorithm

Study on the Characteristic of Sensitive Load under Voltage Sags

2013 ◽  
Vol 418 ◽  
pp. 269-272
Author(s):  
Rong Hui Liu ◽  
Ai Qang Pan ◽  
Hai Bo Wang ◽  
Xiu Yang
Keyword(s):  
Power Supply ◽  
Single Phase ◽  
Voltage Sensitivity ◽  
Voltage Sags ◽  
Phase Voltage ◽  
Three Phase ◽  
Simulation Results

In this paper, the characteristics of AC/DC converter under single-phase voltage sags and three-phase voltage sags are simulated with Matlab emulator. The simulation results show that effects on rectifier equipment under three-phase voltage sags are more serious than those under single-phase voltage sags. The flat wave capacitance plays an important role in voltage sensitivity of sensitive loads. In practice, the capacitance of flat wave capacitor is chosen according to the power supply and load requirements so as to realize the best balance of performance and price.

Characterizing Voltage Sags and Swells Using Three-Phase Voltage Ellipse Parameters

2015 ◽  
Vol 51 (4) ◽  
pp. 2780-2790 ◽  
Author(s):  
Mollah Rezaul Alam ◽  
K. M. Muttaqi ◽  
Abdesselam Bouzerdoum
Keyword(s):  
Voltage Sags ◽  
Phase Voltage ◽  
Three Phase

Park’s Transformation for Electric Power Quality Recognition and Classification in Distribution Networks

2012 ◽  
Vol 1 (2) ◽  
pp. 60-79 ◽  
Author(s):  
Ahmad M. AL Kandari ◽  
Jamal Y. Madouh ◽  
Soliman A. Soliman ◽  
Rashid A. Alammari
Keyword(s):  
Power Quality ◽  
Time Domain ◽  
Single Phase ◽  
Distribution Networks ◽  
Voltage Sags ◽  
Three Phase ◽  
Electric Power Quality ◽  
Voltage Swell ◽  
Phase Signal ◽  
Novel Algorithm

This paper presents a novel algorithm for recognizing and classifying the power quality events based on Park’s transformation, where the three rotating abc phases are transferred to three equivalent stationary dq0 phases (d-q reference frame). This transformation is implemented, either for three-phase or single phase circuits. The proposed algorithm transferred the utility signal to a complex phasor (transformation from time domain to frequency domain). The magnitude of this phasor depends on the magnitude of the signal either a three-phase or a single phase signal. The proposed technique produces the complex phasor loci that depend on the type of power quality event; voltage sags, voltage flickers, voltage swell, and harmonics. The time of starting the disturbance is chosen randomly and the length of disturbance is arbitrary. Implementation of this technique is succeeded in recognizing and classifying the power quality events. Simulated results are presented within the text, for three-phase and single phase events.

Experimental Investigation of the Response of Different PLL Algorithms to Grid Disturbances

2016 ◽  
Vol 856 ◽  
pp. 291-296 ◽  
Author(s):  
Georgios E. Kampitsis ◽  
Anastasis P. Tsoumanis ◽  
Konstantinos C. Gallos ◽  
Stavros A. Papathanassiou ◽  
Stefanos N. Manias
Keyword(s):  
Experimental Investigation ◽  
Reference Frame ◽  
Discrete Time ◽  
Harmonic Distortion ◽  
Digital Controller ◽  
Voltage Sags ◽  
Phase Voltage ◽  
Synchronous Reference Frame ◽  
Three Phase ◽  
Grid Codes

In this paper, the performance of three different phase locked loop (PLL) algorithms is experimentally evaluated in a grid connected photovoltaic inverter. Robust PLL is a key requirement for ensuring system compatibility with existing grid codes. The double second order generalized integrator (DSOGI) and the decoupled double synchronous reference frame (DDSRF) PLL are compared against the conventional synchronous reference frame (SRF) PLL under grid disturbances. All synchronization algorithms are initially simulated in Matlab and subsequently transformed in discrete time for implementation in the digital controller. Grid distortions, such as phase voltage sags, frequency fluctuations and voltage harmonic distortion are emulated via a controllable three phase generator.

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