Abdul Balikci

Cascade PI controller for single-phase STATCOM

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.

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

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.

A novel multilevel converter used for three phase STATCOM under unbalanced load

In this paper, multi-level cascaded Static Synchronous Compensator (STATCOM) is proposed using a novel converter having reduced number of switches. STATCOM is analyzed by using DSP and Matlab, interactively. The level shifted carrier based SPWM method, instantaneous single phase active (P) and reactive (Q) power algorithms are applied to control this converters. The performance of STATCOM is investigated for unbalanced reactive load conditions. The simulation results of Matlab alone and Matlab interactively operated with DSP TMS320F28335 are presented.

Efficiency calculation of inverter for PV applications Using MATLAB and SPICE

The purpose of this paper is to estimate the efficiency of the inverter circuits used for the Photovoltaic (PV) systems. The analysis of a power electronics converter with the SPICE during the steady-state operation takes a long time and the results may not be obtained accurately due to convergence problem in the solver. The MATLAB package program is widely preferred to analyze the power electronics converters if the switching losses are not taken into account and efficiency of the converter is not main purpose of the study. Here, In order to perform a detailed efficiency analysis of converter with SPICE program, the gate signals of IGBTs have been generated as a text file in MATLAB simulation of the same converter and that data has been transferred into the SPICE. The simulation results are verified with experimental results. The algorithm developed here is applicable to all converters that can be simulated in the MATLAB and the SPICE. Hence this approach is very useful to compare the efficiencies of the power electronic converters which are alternative to each other.

Five-level converter with selective harmonic elimination for STATCOM

In this paper, five-level Static Synchronous Compensator (STATCOM) is analyzed with reduced number of power switches. The simulation has been performed by using a digital signal processing unit (DSP) and Matlab/Simulink together. Selective harmonic elimination, single phase real (P) and reactive (Q) power methods are used to control power flow in the delta connected converter. The response of STATCOM is investigated under inductive loading conditions. All the control algorithm is programmed on DSP and grid connected AC/DC converter is simulated in Matlab/Simulink. The predicted results from Matlab and DSP TMS320F28335 have been presented.