Design and PSPICE analysis of a grid connected multilevel converter with reduced number of switches

2014

IET Power Electronics

In this paper, a three-phase, Y-connected, five-level static synchronous compensator with reduced number of switches is proposed for single phase and unbalanced three-phase loads. The level shifted carrier based sinusoidal pulse width modulation method is used for switching. The active and reactive powers demanded by the load are estimated for each phase independently to compensate the reactive power supplied from the power system. The simulation results obtained from Matlab are compared with the results of experimental work and dedicated model of the proposed system. The system is implemented in the laboratory by using DSP TMS320F28335.

Section: Control Algorithmmentioning

confidence: 99%

“…2 b and c . Voltage spike is almost 1.2 times of the DC‐link voltage (sum of two capacitor voltages) [29] after connecting snubber circuit.…”

Section: Control Algorithmmentioning

confidence: 99%

See 1 more Smart Citation

A three‐phase four‐wire static synchronous compensator with reduced number of switches for unbalanced loads

2014

IET Power Electronics

Assessment of two different reactive power estimation methods on single phase loads

Hafezi

2014 16th International Power Electronics and Motion Control Conference and Exposition

2014

In this paper single-phase instantaneous reactive power (p-q) method and non-active current method have been compared. Reactive power and reactive current calculation using these methods have been considered here under distorted voltage and current waveforms. It has been shown that these two methods have some limitations for reactive power compensation. The p-q method with hysteresis current controller and non-active current theory with sinusoidal pulse width modulation (SPWM) controller have been analyzed in Matlab/Simulink. A prototype system has been designed using TMS320F2812 EzDSP in the laboratory and assessment based on simulation and experimental results is given for these methods in this paper

Cascade PI controller for single-phase STATCOM

Hafezi

2014 16th International Power Electronics and Motion Control Conference and Exposition

2014

This paper presents state space model of singlephase STATCOM based on continues switching function. Continues switching functions for bipolar voltage source inverter (VSI) have been used to derive the transfer function for complete controller. Two proportional integral (PI) controllers which are a DC PI for DC link voltage control and an AC PI for alternating current control are implemented in cascade topology in reactive power compensation. Proposed control method has been analyzed in simulation by using MATLAB. Root locus technique is used to design AC PI controller parameters