scholarly journals Frequency-Domain Characteristics of Series DC Arcs in Photovoltaic Systems with Voltage-Source Inverters

2020 ◽  
Vol 10 (22) ◽  
pp. 8042
Author(s):  
Jae-Chang Kim ◽  
Sang-Shin Kwak
Keyword(s):  
Current Data ◽  
Frequency Characteristics ◽  
Frequency Fluctuation ◽  
Voltage Source ◽  
Phase Inverter ◽  
Three Phase ◽  
Arc Current ◽  
Frequency Fluctuations ◽  
Single Phase Inverter ◽  
Three Phase Inverter

In this study, the frequency characteristics of series DC arcs are analyzed according to the types of frequency fluctuations caused by inverters in photovoltaic (PV) systems. These frequency fluctuation types used in analysis include centralized frequency fluctuations by three-phase inverter, spread frequency fluctuations by three-phase inverter, and centralized frequency fluctuations by single-phase inverter. To collect arc current data, the frequency fluctuations are generated by inverters in the arc-generating circuit, designed by referring to UL1699B, and the arcs are generated by separating the arc rods of the arc generator. The frequency analysis of the arc current data, collected using an oscilloscope, is conducted using MATLAB. From the results of the frequency characteristics analysis, it is confirmed that the frequencies in the range from 5 to 40 kHz increase after arc generation regardless of the type of frequency fluctuation. In addition, the smaller the current, the greater the increase in frequencies between 5 and 40 kHz after arc generation. Further, in case of arc currents with centralized frequency fluctuations, for larger switching frequencies, the 5 to 40 kHz components increase to a greater extent after arcing.

Simulation and Experiment of Three-Phase Inverter Based on SVPWM

2010 ◽  
Vol 29-32 ◽  
pp. 709-715
Author(s):  
Zhi Hong Wu ◽  
Guo Qiang Chen ◽  
Yuan Zhu ◽  
Guang Yu Tian ◽  
Liu Qun Fan
Keyword(s):  
Voltage Drop ◽  
Simulation Models ◽  
Voltage Source ◽  
Power Devices ◽  
Phase Inverter ◽  
Light Load ◽  
Three Phase ◽  
In Series ◽  
Simulation And Experiment ◽  
Three Phase Inverter

Aiming at the simulation of the three-phase inverter and SVPWM, the paper introduces their principles. A new method to build SVPWM simulation block in MATLAB/Simulink is proposed. The on-voltage-drop of the power devices is taken into account; the switch and diode are modeled as the connection in series of a resistance and a voltage source in simulation. The simulation and experiment results verify the correctness of simulation models, and show that the on-voltage-drop of the power devices has effects on the phase current and phase/line voltage, especially when the inverter works at a light load state.

Co-simulation and hardware implementation of multi-port rectifier for power system and renewable energy applications

2018 ◽  
Vol 43 (2) ◽  
pp. 162-174
Author(s):  
Karthikrajan Senthilnathan ◽  
K Iyswarya Annapoorani
Keyword(s):  
Single Phase ◽  
Hardware Implementation ◽  
Phase Inverter ◽  
Graphical Programming ◽  
Energy Applications ◽  
Three Phase ◽  
Input Source ◽  
Single Phase Inverter ◽  
Simulation Engines ◽  
Three Phase Inverter

In this article, a novel rectifier is designed for two three-phase sources with single-phase inverter and three-phase inverter. The proposed configuration results in back-to-back converter with the dual input source. The main objective is to reduce the semiconductor components in the rectifier. The rectifier design consists of six diodes and three split capacitors. A separate direct current link capacitor is eliminated due to the presence of split capacitors. The simulation model of rectifier and inverter is designed in Multisim, a PSpice-based power electronics simulator, and interfaced with LabVIEW, a graphical programming language for co-simulation. The co-simulation enables the user to utilize two simulation engines for better analysis. The hardware prototype is fabricated and tested for rectifier and inverter. The co-simulation and hardware results proved that proposed design is capable to use in back-to-back converter applications.

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