Title :
Design and simulation of Cascaded H-bridge multilevel inverter based DSTATCOM for compensation of reactive power and harmonics
Author :
Reddy, J. Ganesh Prasad ; Reddy, K. Ramesh
Author_Institution :
Dept. of Electr. & Electron. Eng., Vasireddy Venkatadri Inst. of Technol., Guntur, India
Abstract :
This paper presents an investigation of five-Level Cascaded H - bridge (CHB) Inverter as Distribution Static Compensator (DSTATCOM) in Power System (PS) for compensation of reactive power and harmonics. The advantages of CHB inverter are low harmonic distortion, reduced number of switches and suppression of switching losses. The DSTATCOM helps to improve the power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non-Liner Diode Rectifier Load (NLDRL). The D-Q reference frame theory is used to generate the reference compensating currents for DSTATCOM while Proportional and Integral (PI) control is used for capacitor dc voltage regulation. A CHB Inverter is considered for shunt compensation of a 11 kV distribution system. Finally a level shifted PWM (LSPWM) and phase shifted PWM (PSPWM) techniques are adopted to investigate the performance of CHB Inverter. The results are obtained through Matlab/Simulink software package.
Keywords :
PI control; PWM invertors; capacitors; compensation; electric current control; harmonic distortion; harmonics suppression; power distribution control; power system harmonics; reactive power control; static VAr compensators; voltage control; CHB inverter; D-Q reference frame theory; DSTATCOM; Matlab; NLDRL; PI control; Simulink; capacitor dc voltage regulation; cascaded H-bridge multilevel inverter; distribution static compensator; distribution system; harmonics compensation; level shifted PWM technique; nonlinear diode rectifier load; phase shifted PWM technique; power factor; power system; reactive power compensation; reference compensating current; shunt compensation; software package; switching loss suppression; total harmonics distortion; Insulated gate bipolar transistors; Inverters; Switches; Tin; Video recording; CHB multilevel inverter; D-Q reference frame theory; DSTATCOM; Level shifted Pulse width modulation (LSPWM); Phase shifted Pulse width modulation (PSPWM); Proportional-Integral (PI) control;
Conference_Titel :
Recent Advances in Information Technology (RAIT), 2012 1st International Conference on
Conference_Location :
Dhanbad
Print_ISBN :
978-1-4577-0694-3
DOI :
10.1109/RAIT.2012.6194546
